diff options
Diffstat (limited to 'arch/m68k/kernel')
46 files changed, 8728 insertions, 5218 deletions
diff --git a/arch/m68k/kernel/Makefile b/arch/m68k/kernel/Makefile index 55d5d6b..c482ebc 100644 --- a/arch/m68k/kernel/Makefile +++ b/arch/m68k/kernel/Makefile @@ -1,17 +1,5 @@ -# -# Makefile for the linux kernel. -# - -ifndef CONFIG_SUN3 - extra-y := head.o +ifdef CONFIG_MMU +include arch/m68k/kernel/Makefile_mm else - extra-y := sun3-head.o +include arch/m68k/kernel/Makefile_no endif -extra-y += vmlinux.lds - -obj-y := entry.o process.o traps.o ints.o signal.o ptrace.o module.o \ - sys_m68k.o time.o setup.o m68k_ksyms.o devres.o - -devres-y = ../../../kernel/irq/devres.o - -obj-y$(CONFIG_MMU_SUN3) += dma.o # no, it's not a typo diff --git a/arch/m68k/kernel/Makefile_mm b/arch/m68k/kernel/Makefile_mm new file mode 100644 index 0000000..55d5d6b --- /dev/null +++ b/arch/m68k/kernel/Makefile_mm @@ -0,0 +1,17 @@ +# +# Makefile for the linux kernel. +# + +ifndef CONFIG_SUN3 + extra-y := head.o +else + extra-y := sun3-head.o +endif +extra-y += vmlinux.lds + +obj-y := entry.o process.o traps.o ints.o signal.o ptrace.o module.o \ + sys_m68k.o time.o setup.o m68k_ksyms.o devres.o + +devres-y = ../../../kernel/irq/devres.o + +obj-y$(CONFIG_MMU_SUN3) += dma.o # no, it's not a typo diff --git a/arch/m68k/kernel/Makefile_no b/arch/m68k/kernel/Makefile_no new file mode 100644 index 0000000..37c3fc0 --- /dev/null +++ b/arch/m68k/kernel/Makefile_no @@ -0,0 +1,10 @@ +# +# Makefile for arch/m68knommu/kernel. +# + +extra-y := vmlinux.lds + +obj-y += dma.o entry.o init_task.o irq.o m68k_ksyms.o process.o ptrace.o \ + setup.o signal.o syscalltable.o sys_m68k.o time.o traps.o + +obj-$(CONFIG_MODULES) += module.o diff --git a/arch/m68k/kernel/asm-offsets.c b/arch/m68k/kernel/asm-offsets.c index 78e59b8..59a69a5 100644 --- a/arch/m68k/kernel/asm-offsets.c +++ b/arch/m68k/kernel/asm-offsets.c @@ -1,100 +1,5 @@ -/* - * This program is used to generate definitions needed by - * assembly language modules. - * - * We use the technique used in the OSF Mach kernel code: - * generate asm statements containing #defines, - * compile this file to assembler, and then extract the - * #defines from the assembly-language output. - */ - -#define ASM_OFFSETS_C - -#include <linux/stddef.h> -#include <linux/sched.h> -#include <linux/kernel_stat.h> -#include <linux/kbuild.h> -#include <asm/bootinfo.h> -#include <asm/irq.h> -#include <asm/amigahw.h> -#include <linux/font.h> - -int main(void) -{ - /* offsets into the task struct */ - DEFINE(TASK_THREAD, offsetof(struct task_struct, thread)); - DEFINE(TASK_INFO, offsetof(struct task_struct, thread.info)); - DEFINE(TASK_MM, offsetof(struct task_struct, mm)); #ifdef CONFIG_MMU - DEFINE(TASK_TINFO, offsetof(struct task_struct, thread.info)); +#include "asm-offsets_mm.c" +#else +#include "asm-offsets_no.c" #endif - - /* offsets into the thread struct */ - DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp)); - DEFINE(THREAD_USP, offsetof(struct thread_struct, usp)); - DEFINE(THREAD_SR, offsetof(struct thread_struct, sr)); - DEFINE(THREAD_FS, offsetof(struct thread_struct, fs)); - DEFINE(THREAD_CRP, offsetof(struct thread_struct, crp)); - DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0)); - DEFINE(THREAD_FPREG, offsetof(struct thread_struct, fp)); - DEFINE(THREAD_FPCNTL, offsetof(struct thread_struct, fpcntl)); - DEFINE(THREAD_FPSTATE, offsetof(struct thread_struct, fpstate)); - - /* offsets into the thread_info struct */ - DEFINE(TINFO_PREEMPT, offsetof(struct thread_info, preempt_count)); - DEFINE(TINFO_FLAGS, offsetof(struct thread_info, flags)); - - /* offsets into the pt_regs */ - DEFINE(PT_OFF_D0, offsetof(struct pt_regs, d0)); - DEFINE(PT_OFF_ORIG_D0, offsetof(struct pt_regs, orig_d0)); - DEFINE(PT_OFF_D1, offsetof(struct pt_regs, d1)); - DEFINE(PT_OFF_D2, offsetof(struct pt_regs, d2)); - DEFINE(PT_OFF_D3, offsetof(struct pt_regs, d3)); - DEFINE(PT_OFF_D4, offsetof(struct pt_regs, d4)); - DEFINE(PT_OFF_D5, offsetof(struct pt_regs, d5)); - DEFINE(PT_OFF_A0, offsetof(struct pt_regs, a0)); - DEFINE(PT_OFF_A1, offsetof(struct pt_regs, a1)); - DEFINE(PT_OFF_A2, offsetof(struct pt_regs, a2)); - DEFINE(PT_OFF_PC, offsetof(struct pt_regs, pc)); - DEFINE(PT_OFF_SR, offsetof(struct pt_regs, sr)); - /* bitfields are a bit difficult */ - DEFINE(PT_OFF_FORMATVEC, offsetof(struct pt_regs, pc) + 4); - - /* offsets into the irq_cpustat_t struct */ - DEFINE(CPUSTAT_SOFTIRQ_PENDING, offsetof(irq_cpustat_t, __softirq_pending)); - - /* offsets into the bi_record struct */ - DEFINE(BIR_TAG, offsetof(struct bi_record, tag)); - DEFINE(BIR_SIZE, offsetof(struct bi_record, size)); - DEFINE(BIR_DATA, offsetof(struct bi_record, data)); - - /* offsets into font_desc (drivers/video/console/font.h) */ - DEFINE(FONT_DESC_IDX, offsetof(struct font_desc, idx)); - DEFINE(FONT_DESC_NAME, offsetof(struct font_desc, name)); - DEFINE(FONT_DESC_WIDTH, offsetof(struct font_desc, width)); - DEFINE(FONT_DESC_HEIGHT, offsetof(struct font_desc, height)); - DEFINE(FONT_DESC_DATA, offsetof(struct font_desc, data)); - DEFINE(FONT_DESC_PREF, offsetof(struct font_desc, pref)); - - /* signal defines */ - DEFINE(LSIGSEGV, SIGSEGV); - DEFINE(LSEGV_MAPERR, SEGV_MAPERR); - DEFINE(LSIGTRAP, SIGTRAP); - DEFINE(LTRAP_TRACE, TRAP_TRACE); - - /* offsets into the custom struct */ - DEFINE(CUSTOMBASE, &amiga_custom); - DEFINE(C_INTENAR, offsetof(struct CUSTOM, intenar)); - DEFINE(C_INTREQR, offsetof(struct CUSTOM, intreqr)); - DEFINE(C_INTENA, offsetof(struct CUSTOM, intena)); - DEFINE(C_INTREQ, offsetof(struct CUSTOM, intreq)); - DEFINE(C_SERDATR, offsetof(struct CUSTOM, serdatr)); - DEFINE(C_SERDAT, offsetof(struct CUSTOM, serdat)); - DEFINE(C_SERPER, offsetof(struct CUSTOM, serper)); - DEFINE(CIAABASE, &ciaa); - DEFINE(CIABBASE, &ciab); - DEFINE(C_PRA, offsetof(struct CIA, pra)); - DEFINE(ZTWOBASE, zTwoBase); - - return 0; -} diff --git a/arch/m68k/kernel/asm-offsets_mm.c b/arch/m68k/kernel/asm-offsets_mm.c new file mode 100644 index 0000000..78e59b8 --- /dev/null +++ b/arch/m68k/kernel/asm-offsets_mm.c @@ -0,0 +1,100 @@ +/* + * This program is used to generate definitions needed by + * assembly language modules. + * + * We use the technique used in the OSF Mach kernel code: + * generate asm statements containing #defines, + * compile this file to assembler, and then extract the + * #defines from the assembly-language output. + */ + +#define ASM_OFFSETS_C + +#include <linux/stddef.h> +#include <linux/sched.h> +#include <linux/kernel_stat.h> +#include <linux/kbuild.h> +#include <asm/bootinfo.h> +#include <asm/irq.h> +#include <asm/amigahw.h> +#include <linux/font.h> + +int main(void) +{ + /* offsets into the task struct */ + DEFINE(TASK_THREAD, offsetof(struct task_struct, thread)); + DEFINE(TASK_INFO, offsetof(struct task_struct, thread.info)); + DEFINE(TASK_MM, offsetof(struct task_struct, mm)); +#ifdef CONFIG_MMU + DEFINE(TASK_TINFO, offsetof(struct task_struct, thread.info)); +#endif + + /* offsets into the thread struct */ + DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp)); + DEFINE(THREAD_USP, offsetof(struct thread_struct, usp)); + DEFINE(THREAD_SR, offsetof(struct thread_struct, sr)); + DEFINE(THREAD_FS, offsetof(struct thread_struct, fs)); + DEFINE(THREAD_CRP, offsetof(struct thread_struct, crp)); + DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0)); + DEFINE(THREAD_FPREG, offsetof(struct thread_struct, fp)); + DEFINE(THREAD_FPCNTL, offsetof(struct thread_struct, fpcntl)); + DEFINE(THREAD_FPSTATE, offsetof(struct thread_struct, fpstate)); + + /* offsets into the thread_info struct */ + DEFINE(TINFO_PREEMPT, offsetof(struct thread_info, preempt_count)); + DEFINE(TINFO_FLAGS, offsetof(struct thread_info, flags)); + + /* offsets into the pt_regs */ + DEFINE(PT_OFF_D0, offsetof(struct pt_regs, d0)); + DEFINE(PT_OFF_ORIG_D0, offsetof(struct pt_regs, orig_d0)); + DEFINE(PT_OFF_D1, offsetof(struct pt_regs, d1)); + DEFINE(PT_OFF_D2, offsetof(struct pt_regs, d2)); + DEFINE(PT_OFF_D3, offsetof(struct pt_regs, d3)); + DEFINE(PT_OFF_D4, offsetof(struct pt_regs, d4)); + DEFINE(PT_OFF_D5, offsetof(struct pt_regs, d5)); + DEFINE(PT_OFF_A0, offsetof(struct pt_regs, a0)); + DEFINE(PT_OFF_A1, offsetof(struct pt_regs, a1)); + DEFINE(PT_OFF_A2, offsetof(struct pt_regs, a2)); + DEFINE(PT_OFF_PC, offsetof(struct pt_regs, pc)); + DEFINE(PT_OFF_SR, offsetof(struct pt_regs, sr)); + /* bitfields are a bit difficult */ + DEFINE(PT_OFF_FORMATVEC, offsetof(struct pt_regs, pc) + 4); + + /* offsets into the irq_cpustat_t struct */ + DEFINE(CPUSTAT_SOFTIRQ_PENDING, offsetof(irq_cpustat_t, __softirq_pending)); + + /* offsets into the bi_record struct */ + DEFINE(BIR_TAG, offsetof(struct bi_record, tag)); + DEFINE(BIR_SIZE, offsetof(struct bi_record, size)); + DEFINE(BIR_DATA, offsetof(struct bi_record, data)); + + /* offsets into font_desc (drivers/video/console/font.h) */ + DEFINE(FONT_DESC_IDX, offsetof(struct font_desc, idx)); + DEFINE(FONT_DESC_NAME, offsetof(struct font_desc, name)); + DEFINE(FONT_DESC_WIDTH, offsetof(struct font_desc, width)); + DEFINE(FONT_DESC_HEIGHT, offsetof(struct font_desc, height)); + DEFINE(FONT_DESC_DATA, offsetof(struct font_desc, data)); + DEFINE(FONT_DESC_PREF, offsetof(struct font_desc, pref)); + + /* signal defines */ + DEFINE(LSIGSEGV, SIGSEGV); + DEFINE(LSEGV_MAPERR, SEGV_MAPERR); + DEFINE(LSIGTRAP, SIGTRAP); + DEFINE(LTRAP_TRACE, TRAP_TRACE); + + /* offsets into the custom struct */ + DEFINE(CUSTOMBASE, &amiga_custom); + DEFINE(C_INTENAR, offsetof(struct CUSTOM, intenar)); + DEFINE(C_INTREQR, offsetof(struct CUSTOM, intreqr)); + DEFINE(C_INTENA, offsetof(struct CUSTOM, intena)); + DEFINE(C_INTREQ, offsetof(struct CUSTOM, intreq)); + DEFINE(C_SERDATR, offsetof(struct CUSTOM, serdatr)); + DEFINE(C_SERDAT, offsetof(struct CUSTOM, serdat)); + DEFINE(C_SERPER, offsetof(struct CUSTOM, serper)); + DEFINE(CIAABASE, &ciaa); + DEFINE(CIABBASE, &ciab); + DEFINE(C_PRA, offsetof(struct CIA, pra)); + DEFINE(ZTWOBASE, zTwoBase); + + return 0; +} diff --git a/arch/m68k/kernel/asm-offsets_no.c b/arch/m68k/kernel/asm-offsets_no.c new file mode 100644 index 0000000..ffe02f4 --- /dev/null +++ b/arch/m68k/kernel/asm-offsets_no.c @@ -0,0 +1,76 @@ +/* + * This program is used to generate definitions needed by + * assembly language modules. + * + * We use the technique used in the OSF Mach kernel code: + * generate asm statements containing #defines, + * compile this file to assembler, and then extract the + * #defines from the assembly-language output. + */ + +#include <linux/stddef.h> +#include <linux/sched.h> +#include <linux/kernel_stat.h> +#include <linux/ptrace.h> +#include <linux/hardirq.h> +#include <linux/kbuild.h> +#include <asm/bootinfo.h> +#include <asm/irq.h> +#include <asm/thread_info.h> + +int main(void) +{ + /* offsets into the task struct */ + DEFINE(TASK_THREAD, offsetof(struct task_struct, thread)); + DEFINE(TASK_MM, offsetof(struct task_struct, mm)); + + /* offsets into the irq_cpustat_t struct */ + DEFINE(CPUSTAT_SOFTIRQ_PENDING, offsetof(irq_cpustat_t, __softirq_pending)); + + /* offsets into the thread struct */ + DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp)); + DEFINE(THREAD_USP, offsetof(struct thread_struct, usp)); + DEFINE(THREAD_SR, offsetof(struct thread_struct, sr)); + DEFINE(THREAD_FS, offsetof(struct thread_struct, fs)); + DEFINE(THREAD_CRP, offsetof(struct thread_struct, crp)); + DEFINE(THREAD_ESP0, offsetof(struct thread_struct, esp0)); + DEFINE(THREAD_FPREG, offsetof(struct thread_struct, fp)); + DEFINE(THREAD_FPCNTL, offsetof(struct thread_struct, fpcntl)); + DEFINE(THREAD_FPSTATE, offsetof(struct thread_struct, fpstate)); + + /* offsets into the pt_regs */ + DEFINE(PT_OFF_D0, offsetof(struct pt_regs, d0)); + DEFINE(PT_OFF_ORIG_D0, offsetof(struct pt_regs, orig_d0)); + DEFINE(PT_OFF_D1, offsetof(struct pt_regs, d1)); + DEFINE(PT_OFF_D2, offsetof(struct pt_regs, d2)); + DEFINE(PT_OFF_D3, offsetof(struct pt_regs, d3)); + DEFINE(PT_OFF_D4, offsetof(struct pt_regs, d4)); + DEFINE(PT_OFF_D5, offsetof(struct pt_regs, d5)); + DEFINE(PT_OFF_A0, offsetof(struct pt_regs, a0)); + DEFINE(PT_OFF_A1, offsetof(struct pt_regs, a1)); + DEFINE(PT_OFF_A2, offsetof(struct pt_regs, a2)); + DEFINE(PT_OFF_PC, offsetof(struct pt_regs, pc)); + DEFINE(PT_OFF_SR, offsetof(struct pt_regs, sr)); + +#ifdef CONFIG_COLDFIRE + /* bitfields are a bit difficult */ + DEFINE(PT_OFF_FORMATVEC, offsetof(struct pt_regs, sr) - 2); +#else + /* bitfields are a bit difficult */ + DEFINE(PT_OFF_FORMATVEC, offsetof(struct pt_regs, pc) + 4); +#endif + + /* signal defines */ + DEFINE(SIGSEGV, SIGSEGV); + DEFINE(SEGV_MAPERR, SEGV_MAPERR); + DEFINE(SIGTRAP, SIGTRAP); + DEFINE(TRAP_TRACE, TRAP_TRACE); + + DEFINE(PT_PTRACED, PT_PTRACED); + + /* Offsets in thread_info structure */ + DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); + DEFINE(TI_PREEMPTCOUNT, offsetof(struct thread_info, preempt_count)); + + return 0; +} diff --git a/arch/m68k/kernel/dma.c b/arch/m68k/kernel/dma.c index 4bbb3c2..90e8cb72 100644 --- a/arch/m68k/kernel/dma.c +++ b/arch/m68k/kernel/dma.c @@ -1,130 +1,5 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file COPYING in the main directory of this archive - * for more details. - */ - -#undef DEBUG - -#include <linux/dma-mapping.h> -#include <linux/device.h> -#include <linux/kernel.h> -#include <linux/scatterlist.h> -#include <linux/slab.h> -#include <linux/vmalloc.h> - -#include <asm/pgalloc.h> - -void *dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *handle, gfp_t flag) -{ - struct page *page, **map; - pgprot_t pgprot; - void *addr; - int i, order; - - pr_debug("dma_alloc_coherent: %d,%x\n", size, flag); - - size = PAGE_ALIGN(size); - order = get_order(size); - - page = alloc_pages(flag, order); - if (!page) - return NULL; - - *handle = page_to_phys(page); - map = kmalloc(sizeof(struct page *) << order, flag & ~__GFP_DMA); - if (!map) { - __free_pages(page, order); - return NULL; - } - split_page(page, order); - - order = 1 << order; - size >>= PAGE_SHIFT; - map[0] = page; - for (i = 1; i < size; i++) - map[i] = page + i; - for (; i < order; i++) - __free_page(page + i); - pgprot = __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY); - if (CPU_IS_040_OR_060) - pgprot_val(pgprot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S; - else - pgprot_val(pgprot) |= _PAGE_NOCACHE030; - addr = vmap(map, size, VM_MAP, pgprot); - kfree(map); - - return addr; -} -EXPORT_SYMBOL(dma_alloc_coherent); - -void dma_free_coherent(struct device *dev, size_t size, - void *addr, dma_addr_t handle) -{ - pr_debug("dma_free_coherent: %p, %x\n", addr, handle); - vfree(addr); -} -EXPORT_SYMBOL(dma_free_coherent); - -void dma_sync_single_for_device(struct device *dev, dma_addr_t handle, - size_t size, enum dma_data_direction dir) -{ - switch (dir) { - case DMA_TO_DEVICE: - cache_push(handle, size); - break; - case DMA_FROM_DEVICE: - cache_clear(handle, size); - break; - default: - if (printk_ratelimit()) - printk("dma_sync_single_for_device: unsupported dir %u\n", dir); - break; - } -} -EXPORT_SYMBOL(dma_sync_single_for_device); - -void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction dir) -{ - int i; - - for (i = 0; i < nents; sg++, i++) - dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir); -} -EXPORT_SYMBOL(dma_sync_sg_for_device); - -dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size, - enum dma_data_direction dir) -{ - dma_addr_t handle = virt_to_bus(addr); - - dma_sync_single_for_device(dev, handle, size, dir); - return handle; -} -EXPORT_SYMBOL(dma_map_single); - -dma_addr_t dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction dir) -{ - dma_addr_t handle = page_to_phys(page) + offset; - - dma_sync_single_for_device(dev, handle, size, dir); - return handle; -} -EXPORT_SYMBOL(dma_map_page); - -int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction dir) -{ - int i; - - for (i = 0; i < nents; sg++, i++) { - sg->dma_address = sg_phys(sg); - dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir); - } - return nents; -} -EXPORT_SYMBOL(dma_map_sg); +#ifdef CONFIG_MMU +#include "dma_mm.c" +#else +#include "dma_no.c" +#endif diff --git a/arch/m68k/kernel/dma_mm.c b/arch/m68k/kernel/dma_mm.c new file mode 100644 index 0000000..4bbb3c2 --- /dev/null +++ b/arch/m68k/kernel/dma_mm.c @@ -0,0 +1,130 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#undef DEBUG + +#include <linux/dma-mapping.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/scatterlist.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> + +#include <asm/pgalloc.h> + +void *dma_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *handle, gfp_t flag) +{ + struct page *page, **map; + pgprot_t pgprot; + void *addr; + int i, order; + + pr_debug("dma_alloc_coherent: %d,%x\n", size, flag); + + size = PAGE_ALIGN(size); + order = get_order(size); + + page = alloc_pages(flag, order); + if (!page) + return NULL; + + *handle = page_to_phys(page); + map = kmalloc(sizeof(struct page *) << order, flag & ~__GFP_DMA); + if (!map) { + __free_pages(page, order); + return NULL; + } + split_page(page, order); + + order = 1 << order; + size >>= PAGE_SHIFT; + map[0] = page; + for (i = 1; i < size; i++) + map[i] = page + i; + for (; i < order; i++) + __free_page(page + i); + pgprot = __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY); + if (CPU_IS_040_OR_060) + pgprot_val(pgprot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S; + else + pgprot_val(pgprot) |= _PAGE_NOCACHE030; + addr = vmap(map, size, VM_MAP, pgprot); + kfree(map); + + return addr; +} +EXPORT_SYMBOL(dma_alloc_coherent); + +void dma_free_coherent(struct device *dev, size_t size, + void *addr, dma_addr_t handle) +{ + pr_debug("dma_free_coherent: %p, %x\n", addr, handle); + vfree(addr); +} +EXPORT_SYMBOL(dma_free_coherent); + +void dma_sync_single_for_device(struct device *dev, dma_addr_t handle, + size_t size, enum dma_data_direction dir) +{ + switch (dir) { + case DMA_TO_DEVICE: + cache_push(handle, size); + break; + case DMA_FROM_DEVICE: + cache_clear(handle, size); + break; + default: + if (printk_ratelimit()) + printk("dma_sync_single_for_device: unsupported dir %u\n", dir); + break; + } +} +EXPORT_SYMBOL(dma_sync_single_for_device); + +void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction dir) +{ + int i; + + for (i = 0; i < nents; sg++, i++) + dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir); +} +EXPORT_SYMBOL(dma_sync_sg_for_device); + +dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size, + enum dma_data_direction dir) +{ + dma_addr_t handle = virt_to_bus(addr); + + dma_sync_single_for_device(dev, handle, size, dir); + return handle; +} +EXPORT_SYMBOL(dma_map_single); + +dma_addr_t dma_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir) +{ + dma_addr_t handle = page_to_phys(page) + offset; + + dma_sync_single_for_device(dev, handle, size, dir); + return handle; +} +EXPORT_SYMBOL(dma_map_page); + +int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction dir) +{ + int i; + + for (i = 0; i < nents; sg++, i++) { + sg->dma_address = sg_phys(sg); + dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir); + } + return nents; +} +EXPORT_SYMBOL(dma_map_sg); diff --git a/arch/m68k/kernel/dma_no.c b/arch/m68k/kernel/dma_no.c new file mode 100644 index 0000000..fc61541 --- /dev/null +++ b/arch/m68k/kernel/dma_no.c @@ -0,0 +1,74 @@ +/* + * Dynamic DMA mapping support. + * + * We never have any address translations to worry about, so this + * is just alloc/free. + */ + +#include <linux/types.h> +#include <linux/gfp.h> +#include <linux/mm.h> +#include <linux/device.h> +#include <linux/dma-mapping.h> +#include <asm/cacheflush.h> + +void *dma_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp) +{ + void *ret; + /* ignore region specifiers */ + gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); + + if (dev == NULL || (*dev->dma_mask < 0xffffffff)) + gfp |= GFP_DMA; + ret = (void *)__get_free_pages(gfp, get_order(size)); + + if (ret != NULL) { + memset(ret, 0, size); + *dma_handle = virt_to_phys(ret); + } + return ret; +} + +void dma_free_coherent(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle) +{ + free_pages((unsigned long)vaddr, get_order(size)); +} + +void dma_sync_single_for_device(struct device *dev, dma_addr_t handle, + size_t size, enum dma_data_direction dir) +{ + switch (dir) { + case DMA_TO_DEVICE: + flush_dcache_range(handle, size); + break; + case DMA_FROM_DEVICE: + /* Should be clear already */ + break; + default: + if (printk_ratelimit()) + printk("dma_sync_single_for_device: unsupported dir %u\n", dir); + break; + } +} + +EXPORT_SYMBOL(dma_sync_single_for_device); +dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size, + enum dma_data_direction dir) +{ + dma_addr_t handle = virt_to_phys(addr); + flush_dcache_range(handle, size); + return handle; +} +EXPORT_SYMBOL(dma_map_single); + +dma_addr_t dma_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir) +{ + dma_addr_t handle = page_to_phys(page) + offset; + dma_sync_single_for_device(dev, handle, size, dir); + return handle; +} +EXPORT_SYMBOL(dma_map_page); diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S index 1559dea..081cf96 100644 --- a/arch/m68k/kernel/entry.S +++ b/arch/m68k/kernel/entry.S @@ -1,753 +1,5 @@ -/* -*- mode: asm -*- - * - * linux/arch/m68k/kernel/entry.S - * - * Copyright (C) 1991, 1992 Linus Torvalds - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file README.legal in the main directory of this archive - * for more details. - * - * Linux/m68k support by Hamish Macdonald - * - * 68060 fixes by Jesper Skov - * - */ - -/* - * entry.S contains the system-call and fault low-level handling routines. - * This also contains the timer-interrupt handler, as well as all interrupts - * and faults that can result in a task-switch. - * - * NOTE: This code handles signal-recognition, which happens every time - * after a timer-interrupt and after each system call. - * - */ - -/* - * 12/03/96 Jes: Currently we only support m68k single-cpu systems, so - * all pointers that used to be 'current' are now entry - * number 0 in the 'current_set' list. - * - * 6/05/00 RZ: addedd writeback completion after return from sighandler - * for 68040 - */ - -#include <linux/linkage.h> -#include <asm/entry.h> -#include <asm/errno.h> -#include <asm/setup.h> -#include <asm/segment.h> -#include <asm/traps.h> -#include <asm/unistd.h> - -#include <asm/asm-offsets.h> - -.globl system_call, buserr, trap, resume -.globl sys_call_table -.globl sys_fork, sys_clone, sys_vfork -.globl ret_from_interrupt, bad_interrupt -.globl auto_irqhandler_fixup -.globl user_irqvec_fixup, user_irqhandler_fixup - -.text -ENTRY(buserr) - SAVE_ALL_INT - GET_CURRENT(%d0) - movel %sp,%sp@- | stack frame pointer argument - bsrl buserr_c - addql #4,%sp - jra .Lret_from_exception - -ENTRY(trap) - SAVE_ALL_INT - GET_CURRENT(%d0) - movel %sp,%sp@- | stack frame pointer argument - bsrl trap_c - addql #4,%sp - jra .Lret_from_exception - - | After a fork we jump here directly from resume, - | so that %d1 contains the previous task - | schedule_tail now used regardless of CONFIG_SMP -ENTRY(ret_from_fork) - movel %d1,%sp@- - jsr schedule_tail - addql #4,%sp - jra .Lret_from_exception - -do_trace_entry: - movel #-ENOSYS,%sp@(PT_OFF_D0)| needed for strace - subql #4,%sp - SAVE_SWITCH_STACK - jbsr syscall_trace - RESTORE_SWITCH_STACK - addql #4,%sp - movel %sp@(PT_OFF_ORIG_D0),%d0 - cmpl #NR_syscalls,%d0 - jcs syscall -badsys: - movel #-ENOSYS,%sp@(PT_OFF_D0) - jra ret_from_syscall - -do_trace_exit: - subql #4,%sp - SAVE_SWITCH_STACK - jbsr syscall_trace - RESTORE_SWITCH_STACK - addql #4,%sp - jra .Lret_from_exception - -ENTRY(ret_from_signal) - tstb %curptr@(TASK_INFO+TINFO_FLAGS+2) - jge 1f - jbsr syscall_trace -1: RESTORE_SWITCH_STACK - addql #4,%sp -/* on 68040 complete pending writebacks if any */ -#ifdef CONFIG_M68040 - bfextu %sp@(PT_OFF_FORMATVEC){#0,#4},%d0 - subql #7,%d0 | bus error frame ? - jbne 1f - movel %sp,%sp@- - jbsr berr_040cleanup - addql #4,%sp -1: +#ifdef CONFIG_MMU +#include "entry_mm.S" +#else +#include "entry_no.S" #endif - jra .Lret_from_exception - -ENTRY(system_call) - SAVE_ALL_SYS - - GET_CURRENT(%d1) - | save top of frame - movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0) - - | syscall trace? - tstb %curptr@(TASK_INFO+TINFO_FLAGS+2) - jmi do_trace_entry - cmpl #NR_syscalls,%d0 - jcc badsys -syscall: - jbsr @(sys_call_table,%d0:l:4)@(0) - movel %d0,%sp@(PT_OFF_D0) | save the return value -ret_from_syscall: - |oriw #0x0700,%sr - movew %curptr@(TASK_INFO+TINFO_FLAGS+2),%d0 - jne syscall_exit_work -1: RESTORE_ALL - -syscall_exit_work: - btst #5,%sp@(PT_OFF_SR) | check if returning to kernel - bnes 1b | if so, skip resched, signals - lslw #1,%d0 - jcs do_trace_exit - jmi do_delayed_trace - lslw #8,%d0 - jmi do_signal_return - pea resume_userspace - jra schedule - - -ENTRY(ret_from_exception) -.Lret_from_exception: - btst #5,%sp@(PT_OFF_SR) | check if returning to kernel - bnes 1f | if so, skip resched, signals - | only allow interrupts when we are really the last one on the - | kernel stack, otherwise stack overflow can occur during - | heavy interrupt load - andw #ALLOWINT,%sr - -resume_userspace: - moveb %curptr@(TASK_INFO+TINFO_FLAGS+3),%d0 - jne exit_work -1: RESTORE_ALL - -exit_work: - | save top of frame - movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0) - lslb #1,%d0 - jmi do_signal_return - pea resume_userspace - jra schedule - - -do_signal_return: - |andw #ALLOWINT,%sr - subql #4,%sp | dummy return address - SAVE_SWITCH_STACK - pea %sp@(SWITCH_STACK_SIZE) - bsrl do_signal - addql #4,%sp - RESTORE_SWITCH_STACK - addql #4,%sp - jbra resume_userspace - -do_delayed_trace: - bclr #7,%sp@(PT_OFF_SR) | clear trace bit in SR - pea 1 | send SIGTRAP - movel %curptr,%sp@- - pea LSIGTRAP - jbsr send_sig - addql #8,%sp - addql #4,%sp - jbra resume_userspace - - -/* This is the main interrupt handler for autovector interrupts */ - -ENTRY(auto_inthandler) - SAVE_ALL_INT - GET_CURRENT(%d0) - addqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) - | put exception # in d0 - bfextu %sp@(PT_OFF_FORMATVEC){#4,#10},%d0 - subw #VEC_SPUR,%d0 - - movel %sp,%sp@- - movel %d0,%sp@- | put vector # on stack -auto_irqhandler_fixup = . + 2 - jsr __m68k_handle_int | process the IRQ - addql #8,%sp | pop parameters off stack - -ret_from_interrupt: - subqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) - jeq ret_from_last_interrupt -2: RESTORE_ALL - - ALIGN -ret_from_last_interrupt: - moveq #(~ALLOWINT>>8)&0xff,%d0 - andb %sp@(PT_OFF_SR),%d0 - jne 2b - - /* check if we need to do software interrupts */ - tstl irq_stat+CPUSTAT_SOFTIRQ_PENDING - jeq .Lret_from_exception - pea ret_from_exception - jra do_softirq - -/* Handler for user defined interrupt vectors */ - -ENTRY(user_inthandler) - SAVE_ALL_INT - GET_CURRENT(%d0) - addqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) - | put exception # in d0 - bfextu %sp@(PT_OFF_FORMATVEC){#4,#10},%d0 -user_irqvec_fixup = . + 2 - subw #VEC_USER,%d0 - - movel %sp,%sp@- - movel %d0,%sp@- | put vector # on stack -user_irqhandler_fixup = . + 2 - jsr __m68k_handle_int | process the IRQ - addql #8,%sp | pop parameters off stack - - subqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) - jeq ret_from_last_interrupt - RESTORE_ALL - -/* Handler for uninitialized and spurious interrupts */ - -ENTRY(bad_inthandler) - SAVE_ALL_INT - GET_CURRENT(%d0) - addqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) - - movel %sp,%sp@- - jsr handle_badint - addql #4,%sp - - subqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) - jeq ret_from_last_interrupt - RESTORE_ALL - - -ENTRY(sys_fork) - SAVE_SWITCH_STACK - pea %sp@(SWITCH_STACK_SIZE) - jbsr m68k_fork - addql #4,%sp - RESTORE_SWITCH_STACK - rts - -ENTRY(sys_clone) - SAVE_SWITCH_STACK - pea %sp@(SWITCH_STACK_SIZE) - jbsr m68k_clone - addql #4,%sp - RESTORE_SWITCH_STACK - rts - -ENTRY(sys_vfork) - SAVE_SWITCH_STACK - pea %sp@(SWITCH_STACK_SIZE) - jbsr m68k_vfork - addql #4,%sp - RESTORE_SWITCH_STACK - rts - -ENTRY(sys_sigreturn) - SAVE_SWITCH_STACK - jbsr do_sigreturn - RESTORE_SWITCH_STACK - rts - -ENTRY(sys_rt_sigreturn) - SAVE_SWITCH_STACK - jbsr do_rt_sigreturn - RESTORE_SWITCH_STACK - rts - -resume: - /* - * Beware - when entering resume, prev (the current task) is - * in a0, next (the new task) is in a1,so don't change these - * registers until their contents are no longer needed. - */ - - /* save sr */ - movew %sr,%a0@(TASK_THREAD+THREAD_SR) - - /* save fs (sfc,%dfc) (may be pointing to kernel memory) */ - movec %sfc,%d0 - movew %d0,%a0@(TASK_THREAD+THREAD_FS) - - /* save usp */ - /* it is better to use a movel here instead of a movew 8*) */ - movec %usp,%d0 - movel %d0,%a0@(TASK_THREAD+THREAD_USP) - - /* save non-scratch registers on stack */ - SAVE_SWITCH_STACK - - /* save current kernel stack pointer */ - movel %sp,%a0@(TASK_THREAD+THREAD_KSP) - - /* save floating point context */ -#ifndef CONFIG_M68KFPU_EMU_ONLY -#ifdef CONFIG_M68KFPU_EMU - tstl m68k_fputype - jeq 3f -#endif - fsave %a0@(TASK_THREAD+THREAD_FPSTATE) - -#if defined(CONFIG_M68060) -#if !defined(CPU_M68060_ONLY) - btst #3,m68k_cputype+3 - beqs 1f -#endif - /* The 060 FPU keeps status in bits 15-8 of the first longword */ - tstb %a0@(TASK_THREAD+THREAD_FPSTATE+2) - jeq 3f -#if !defined(CPU_M68060_ONLY) - jra 2f -#endif -#endif /* CONFIG_M68060 */ -#if !defined(CPU_M68060_ONLY) -1: tstb %a0@(TASK_THREAD+THREAD_FPSTATE) - jeq 3f -#endif -2: fmovemx %fp0-%fp7,%a0@(TASK_THREAD+THREAD_FPREG) - fmoveml %fpcr/%fpsr/%fpiar,%a0@(TASK_THREAD+THREAD_FPCNTL) -3: -#endif /* CONFIG_M68KFPU_EMU_ONLY */ - /* Return previous task in %d1 */ - movel %curptr,%d1 - - /* switch to new task (a1 contains new task) */ - movel %a1,%curptr - - /* restore floating point context */ -#ifndef CONFIG_M68KFPU_EMU_ONLY -#ifdef CONFIG_M68KFPU_EMU - tstl m68k_fputype - jeq 4f -#endif -#if defined(CONFIG_M68060) -#if !defined(CPU_M68060_ONLY) - btst #3,m68k_cputype+3 - beqs 1f -#endif - /* The 060 FPU keeps status in bits 15-8 of the first longword */ - tstb %a1@(TASK_THREAD+THREAD_FPSTATE+2) - jeq 3f -#if !defined(CPU_M68060_ONLY) - jra 2f -#endif -#endif /* CONFIG_M68060 */ -#if !defined(CPU_M68060_ONLY) -1: tstb %a1@(TASK_THREAD+THREAD_FPSTATE) - jeq 3f -#endif -2: fmovemx %a1@(TASK_THREAD+THREAD_FPREG),%fp0-%fp7 - fmoveml %a1@(TASK_THREAD+THREAD_FPCNTL),%fpcr/%fpsr/%fpiar -3: frestore %a1@(TASK_THREAD+THREAD_FPSTATE) -4: -#endif /* CONFIG_M68KFPU_EMU_ONLY */ - - /* restore the kernel stack pointer */ - movel %a1@(TASK_THREAD+THREAD_KSP),%sp - - /* restore non-scratch registers */ - RESTORE_SWITCH_STACK - - /* restore user stack pointer */ - movel %a1@(TASK_THREAD+THREAD_USP),%a0 - movel %a0,%usp - - /* restore fs (sfc,%dfc) */ - movew %a1@(TASK_THREAD+THREAD_FS),%a0 - movec %a0,%sfc - movec %a0,%dfc - - /* restore status register */ - movew %a1@(TASK_THREAD+THREAD_SR),%sr - - rts - -.data -ALIGN -sys_call_table: - .long sys_restart_syscall /* 0 - old "setup()" system call, used for restarting */ - .long sys_exit - .long sys_fork - .long sys_read - .long sys_write - .long sys_open /* 5 */ - .long sys_close - .long sys_waitpid - .long sys_creat - .long sys_link - .long sys_unlink /* 10 */ - .long sys_execve - .long sys_chdir - .long sys_time - .long sys_mknod - .long sys_chmod /* 15 */ - .long sys_chown16 - .long sys_ni_syscall /* old break syscall holder */ - .long sys_stat - .long sys_lseek - .long sys_getpid /* 20 */ - .long sys_mount - .long sys_oldumount - .long sys_setuid16 - .long sys_getuid16 - .long sys_stime /* 25 */ - .long sys_ptrace - .long sys_alarm - .long sys_fstat - .long sys_pause - .long sys_utime /* 30 */ - .long sys_ni_syscall /* old stty syscall holder */ - .long sys_ni_syscall /* old gtty syscall holder */ - .long sys_access - .long sys_nice - .long sys_ni_syscall /* 35 */ /* old ftime syscall holder */ - .long sys_sync - .long sys_kill - .long sys_rename - .long sys_mkdir - .long sys_rmdir /* 40 */ - .long sys_dup - .long sys_pipe - .long sys_times - .long sys_ni_syscall /* old prof syscall holder */ - .long sys_brk /* 45 */ - .long sys_setgid16 - .long sys_getgid16 - .long sys_signal - .long sys_geteuid16 - .long sys_getegid16 /* 50 */ - .long sys_acct - .long sys_umount /* recycled never used phys() */ - .long sys_ni_syscall /* old lock syscall holder */ - .long sys_ioctl - .long sys_fcntl /* 55 */ - .long sys_ni_syscall /* old mpx syscall holder */ - .long sys_setpgid - .long sys_ni_syscall /* old ulimit syscall holder */ - .long sys_ni_syscall - .long sys_umask /* 60 */ - .long sys_chroot - .long sys_ustat - .long sys_dup2 - .long sys_getppid - .long sys_getpgrp /* 65 */ - .long sys_setsid - .long sys_sigaction - .long sys_sgetmask - .long sys_ssetmask - .long sys_setreuid16 /* 70 */ - .long sys_setregid16 - .long sys_sigsuspend - .long sys_sigpending - .long sys_sethostname - .long sys_setrlimit /* 75 */ - .long sys_old_getrlimit - .long sys_getrusage - .long sys_gettimeofday - .long sys_settimeofday - .long sys_getgroups16 /* 80 */ - .long sys_setgroups16 - .long sys_old_select - .long sys_symlink - .long sys_lstat - .long sys_readlink /* 85 */ - .long sys_uselib - .long sys_swapon - .long sys_reboot - .long sys_old_readdir - .long sys_old_mmap /* 90 */ - .long sys_munmap - .long sys_truncate - .long sys_ftruncate - .long sys_fchmod - .long sys_fchown16 /* 95 */ - .long sys_getpriority - .long sys_setpriority - .long sys_ni_syscall /* old profil syscall holder */ - .long sys_statfs - .long sys_fstatfs /* 100 */ - .long sys_ni_syscall /* ioperm for i386 */ - .long sys_socketcall - .long sys_syslog - .long sys_setitimer - .long sys_getitimer /* 105 */ - .long sys_newstat - .long sys_newlstat - .long sys_newfstat - .long sys_ni_syscall - .long sys_ni_syscall /* 110 */ /* iopl for i386 */ - .long sys_vhangup - .long sys_ni_syscall /* obsolete idle() syscall */ - .long sys_ni_syscall /* vm86old for i386 */ - .long sys_wait4 - .long sys_swapoff /* 115 */ - .long sys_sysinfo - .long sys_ipc - .long sys_fsync - .long sys_sigreturn - .long sys_clone /* 120 */ - .long sys_setdomainname - .long sys_newuname - .long sys_cacheflush /* modify_ldt for i386 */ - .long sys_adjtimex - .long sys_mprotect /* 125 */ - .long sys_sigprocmask - .long sys_ni_syscall /* old "create_module" */ - .long sys_init_module - .long sys_delete_module - .long sys_ni_syscall /* 130 - old "get_kernel_syms" */ - .long sys_quotactl - .long sys_getpgid - .long sys_fchdir - .long sys_bdflush - .long sys_sysfs /* 135 */ - .long sys_personality - .long sys_ni_syscall /* for afs_syscall */ - .long sys_setfsuid16 - .long sys_setfsgid16 - .long sys_llseek /* 140 */ - .long sys_getdents - .long sys_select - .long sys_flock - .long sys_msync - .long sys_readv /* 145 */ - .long sys_writev - .long sys_getsid - .long sys_fdatasync - .long sys_sysctl - .long sys_mlock /* 150 */ - .long sys_munlock - .long sys_mlockall - .long sys_munlockall - .long sys_sched_setparam - .long sys_sched_getparam /* 155 */ - .long sys_sched_setscheduler - .long sys_sched_getscheduler - .long sys_sched_yield - .long sys_sched_get_priority_max - .long sys_sched_get_priority_min /* 160 */ - .long sys_sched_rr_get_interval - .long sys_nanosleep - .long sys_mremap - .long sys_setresuid16 - .long sys_getresuid16 /* 165 */ - .long sys_getpagesize - .long sys_ni_syscall /* old sys_query_module */ - .long sys_poll - .long sys_nfsservctl - .long sys_setresgid16 /* 170 */ - .long sys_getresgid16 - .long sys_prctl - .long sys_rt_sigreturn - .long sys_rt_sigaction - .long sys_rt_sigprocmask /* 175 */ - .long sys_rt_sigpending - .long sys_rt_sigtimedwait - .long sys_rt_sigqueueinfo - .long sys_rt_sigsuspend - .long sys_pread64 /* 180 */ - .long sys_pwrite64 - .long sys_lchown16; - .long sys_getcwd - .long sys_capget - .long sys_capset /* 185 */ - .long sys_sigaltstack - .long sys_sendfile - .long sys_ni_syscall /* streams1 */ - .long sys_ni_syscall /* streams2 */ - .long sys_vfork /* 190 */ - .long sys_getrlimit - .long sys_mmap2 - .long sys_truncate64 - .long sys_ftruncate64 - .long sys_stat64 /* 195 */ - .long sys_lstat64 - .long sys_fstat64 - .long sys_chown - .long sys_getuid - .long sys_getgid /* 200 */ - .long sys_geteuid - .long sys_getegid - .long sys_setreuid - .long sys_setregid - .long sys_getgroups /* 205 */ - .long sys_setgroups - .long sys_fchown - .long sys_setresuid - .long sys_getresuid - .long sys_setresgid /* 210 */ - .long sys_getresgid - .long sys_lchown - .long sys_setuid - .long sys_setgid - .long sys_setfsuid /* 215 */ - .long sys_setfsgid - .long sys_pivot_root - .long sys_ni_syscall - .long sys_ni_syscall - .long sys_getdents64 /* 220 */ - .long sys_gettid - .long sys_tkill - .long sys_setxattr - .long sys_lsetxattr - .long sys_fsetxattr /* 225 */ - .long sys_getxattr - .long sys_lgetxattr - .long sys_fgetxattr - .long sys_listxattr - .long sys_llistxattr /* 230 */ - .long sys_flistxattr - .long sys_removexattr - .long sys_lremovexattr - .long sys_fremovexattr - .long sys_futex /* 235 */ - .long sys_sendfile64 - .long sys_mincore - .long sys_madvise - .long sys_fcntl64 - .long sys_readahead /* 240 */ - .long sys_io_setup - .long sys_io_destroy - .long sys_io_getevents - .long sys_io_submit - .long sys_io_cancel /* 245 */ - .long sys_fadvise64 - .long sys_exit_group - .long sys_lookup_dcookie - .long sys_epoll_create - .long sys_epoll_ctl /* 250 */ - .long sys_epoll_wait - .long sys_remap_file_pages - .long sys_set_tid_address - .long sys_timer_create - .long sys_timer_settime /* 255 */ - .long sys_timer_gettime - .long sys_timer_getoverrun - .long sys_timer_delete - .long sys_clock_settime - .long sys_clock_gettime /* 260 */ - .long sys_clock_getres - .long sys_clock_nanosleep - .long sys_statfs64 - .long sys_fstatfs64 - .long sys_tgkill /* 265 */ - .long sys_utimes - .long sys_fadvise64_64 - .long sys_mbind - .long sys_get_mempolicy - .long sys_set_mempolicy /* 270 */ - .long sys_mq_open - .long sys_mq_unlink - .long sys_mq_timedsend - .long sys_mq_timedreceive - .long sys_mq_notify /* 275 */ - .long sys_mq_getsetattr - .long sys_waitid - .long sys_ni_syscall /* for sys_vserver */ - .long sys_add_key - .long sys_request_key /* 280 */ - .long sys_keyctl - .long sys_ioprio_set - .long sys_ioprio_get - .long sys_inotify_init - .long sys_inotify_add_watch /* 285 */ - .long sys_inotify_rm_watch - .long sys_migrate_pages - .long sys_openat - .long sys_mkdirat - .long sys_mknodat /* 290 */ - .long sys_fchownat - .long sys_futimesat - .long sys_fstatat64 - .long sys_unlinkat - .long sys_renameat /* 295 */ - .long sys_linkat - .long sys_symlinkat - .long sys_readlinkat - .long sys_fchmodat - .long sys_faccessat /* 300 */ - .long sys_ni_syscall /* Reserved for pselect6 */ - .long sys_ni_syscall /* Reserved for ppoll */ - .long sys_unshare - .long sys_set_robust_list - .long sys_get_robust_list /* 305 */ - .long sys_splice - .long sys_sync_file_range - .long sys_tee - .long sys_vmsplice - .long sys_move_pages /* 310 */ - .long sys_sched_setaffinity - .long sys_sched_getaffinity - .long sys_kexec_load - .long sys_getcpu - .long sys_epoll_pwait /* 315 */ - .long sys_utimensat - .long sys_signalfd - .long sys_timerfd_create - .long sys_eventfd - .long sys_fallocate /* 320 */ - .long sys_timerfd_settime - .long sys_timerfd_gettime - .long sys_signalfd4 - .long sys_eventfd2 - .long sys_epoll_create1 /* 325 */ - .long sys_dup3 - .long sys_pipe2 - .long sys_inotify_init1 - .long sys_preadv - .long sys_pwritev /* 330 */ - .long sys_rt_tgsigqueueinfo - .long sys_perf_event_open - .long sys_get_thread_area - .long sys_set_thread_area - .long sys_atomic_cmpxchg_32 /* 335 */ - .long sys_atomic_barrier - .long sys_fanotify_init - .long sys_fanotify_mark - .long sys_prlimit64 - diff --git a/arch/m68k/kernel/entry_mm.S b/arch/m68k/kernel/entry_mm.S new file mode 100644 index 0000000..1359ee6 --- /dev/null +++ b/arch/m68k/kernel/entry_mm.S @@ -0,0 +1,757 @@ +/* -*- mode: asm -*- + * + * linux/arch/m68k/kernel/entry.S + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file README.legal in the main directory of this archive + * for more details. + * + * Linux/m68k support by Hamish Macdonald + * + * 68060 fixes by Jesper Skov + * + */ + +/* + * entry.S contains the system-call and fault low-level handling routines. + * This also contains the timer-interrupt handler, as well as all interrupts + * and faults that can result in a task-switch. + * + * NOTE: This code handles signal-recognition, which happens every time + * after a timer-interrupt and after each system call. + * + */ + +/* + * 12/03/96 Jes: Currently we only support m68k single-cpu systems, so + * all pointers that used to be 'current' are now entry + * number 0 in the 'current_set' list. + * + * 6/05/00 RZ: addedd writeback completion after return from sighandler + * for 68040 + */ + +#include <linux/linkage.h> +#include <asm/entry.h> +#include <asm/errno.h> +#include <asm/setup.h> +#include <asm/segment.h> +#include <asm/traps.h> +#include <asm/unistd.h> + +#include <asm/asm-offsets.h> + +.globl system_call, buserr, trap, resume +.globl sys_call_table +.globl sys_fork, sys_clone, sys_vfork +.globl ret_from_interrupt, bad_interrupt +.globl auto_irqhandler_fixup +.globl user_irqvec_fixup, user_irqhandler_fixup + +.text +ENTRY(buserr) + SAVE_ALL_INT + GET_CURRENT(%d0) + movel %sp,%sp@- | stack frame pointer argument + bsrl buserr_c + addql #4,%sp + jra .Lret_from_exception + +ENTRY(trap) + SAVE_ALL_INT + GET_CURRENT(%d0) + movel %sp,%sp@- | stack frame pointer argument + bsrl trap_c + addql #4,%sp + jra .Lret_from_exception + + | After a fork we jump here directly from resume, + | so that %d1 contains the previous task + | schedule_tail now used regardless of CONFIG_SMP +ENTRY(ret_from_fork) + movel %d1,%sp@- + jsr schedule_tail + addql #4,%sp + jra .Lret_from_exception + +do_trace_entry: + movel #-ENOSYS,%sp@(PT_OFF_D0)| needed for strace + subql #4,%sp + SAVE_SWITCH_STACK + jbsr syscall_trace + RESTORE_SWITCH_STACK + addql #4,%sp + movel %sp@(PT_OFF_ORIG_D0),%d0 + cmpl #NR_syscalls,%d0 + jcs syscall +badsys: + movel #-ENOSYS,%sp@(PT_OFF_D0) + jra ret_from_syscall + +do_trace_exit: + subql #4,%sp + SAVE_SWITCH_STACK + jbsr syscall_trace + RESTORE_SWITCH_STACK + addql #4,%sp + jra .Lret_from_exception + +ENTRY(ret_from_signal) + tstb %curptr@(TASK_INFO+TINFO_FLAGS+2) + jge 1f + jbsr syscall_trace +1: RESTORE_SWITCH_STACK + addql #4,%sp +/* on 68040 complete pending writebacks if any */ +#ifdef CONFIG_M68040 + bfextu %sp@(PT_OFF_FORMATVEC){#0,#4},%d0 + subql #7,%d0 | bus error frame ? + jbne 1f + movel %sp,%sp@- + jbsr berr_040cleanup + addql #4,%sp +1: +#endif + jra .Lret_from_exception + +ENTRY(system_call) + SAVE_ALL_SYS + + GET_CURRENT(%d1) + | save top of frame + movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0) + + | syscall trace? + tstb %curptr@(TASK_INFO+TINFO_FLAGS+2) + jmi do_trace_entry + cmpl #NR_syscalls,%d0 + jcc badsys +syscall: + jbsr @(sys_call_table,%d0:l:4)@(0) + movel %d0,%sp@(PT_OFF_D0) | save the return value +ret_from_syscall: + |oriw #0x0700,%sr + movew %curptr@(TASK_INFO+TINFO_FLAGS+2),%d0 + jne syscall_exit_work +1: RESTORE_ALL + +syscall_exit_work: + btst #5,%sp@(PT_OFF_SR) | check if returning to kernel + bnes 1b | if so, skip resched, signals + lslw #1,%d0 + jcs do_trace_exit + jmi do_delayed_trace + lslw #8,%d0 + jmi do_signal_return + pea resume_userspace + jra schedule + + +ENTRY(ret_from_exception) +.Lret_from_exception: + btst #5,%sp@(PT_OFF_SR) | check if returning to kernel + bnes 1f | if so, skip resched, signals + | only allow interrupts when we are really the last one on the + | kernel stack, otherwise stack overflow can occur during + | heavy interrupt load + andw #ALLOWINT,%sr + +resume_userspace: + moveb %curptr@(TASK_INFO+TINFO_FLAGS+3),%d0 + jne exit_work +1: RESTORE_ALL + +exit_work: + | save top of frame + movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0) + lslb #1,%d0 + jmi do_signal_return + pea resume_userspace + jra schedule + + +do_signal_return: + |andw #ALLOWINT,%sr + subql #4,%sp | dummy return address + SAVE_SWITCH_STACK + pea %sp@(SWITCH_STACK_SIZE) + bsrl do_signal + addql #4,%sp + RESTORE_SWITCH_STACK + addql #4,%sp + jbra resume_userspace + +do_delayed_trace: + bclr #7,%sp@(PT_OFF_SR) | clear trace bit in SR + pea 1 | send SIGTRAP + movel %curptr,%sp@- + pea LSIGTRAP + jbsr send_sig + addql #8,%sp + addql #4,%sp + jbra resume_userspace + + +/* This is the main interrupt handler for autovector interrupts */ + +ENTRY(auto_inthandler) + SAVE_ALL_INT + GET_CURRENT(%d0) + addqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) + | put exception # in d0 + bfextu %sp@(PT_OFF_FORMATVEC){#4,#10},%d0 + subw #VEC_SPUR,%d0 + + movel %sp,%sp@- + movel %d0,%sp@- | put vector # on stack +auto_irqhandler_fixup = . + 2 + jsr __m68k_handle_int | process the IRQ + addql #8,%sp | pop parameters off stack + +ret_from_interrupt: + subqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) + jeq ret_from_last_interrupt +2: RESTORE_ALL + + ALIGN +ret_from_last_interrupt: + moveq #(~ALLOWINT>>8)&0xff,%d0 + andb %sp@(PT_OFF_SR),%d0 + jne 2b + + /* check if we need to do software interrupts */ + tstl irq_stat+CPUSTAT_SOFTIRQ_PENDING + jeq .Lret_from_exception + pea ret_from_exception + jra do_softirq + +/* Handler for user defined interrupt vectors */ + +ENTRY(user_inthandler) + SAVE_ALL_INT + GET_CURRENT(%d0) + addqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) + | put exception # in d0 + bfextu %sp@(PT_OFF_FORMATVEC){#4,#10},%d0 +user_irqvec_fixup = . + 2 + subw #VEC_USER,%d0 + + movel %sp,%sp@- + movel %d0,%sp@- | put vector # on stack +user_irqhandler_fixup = . + 2 + jsr __m68k_handle_int | process the IRQ + addql #8,%sp | pop parameters off stack + + subqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) + jeq ret_from_last_interrupt + RESTORE_ALL + +/* Handler for uninitialized and spurious interrupts */ + +ENTRY(bad_inthandler) + SAVE_ALL_INT + GET_CURRENT(%d0) + addqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) + + movel %sp,%sp@- + jsr handle_badint + addql #4,%sp + + subqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1) + jeq ret_from_last_interrupt + RESTORE_ALL + + +ENTRY(sys_fork) + SAVE_SWITCH_STACK + pea %sp@(SWITCH_STACK_SIZE) + jbsr m68k_fork + addql #4,%sp + RESTORE_SWITCH_STACK + rts + +ENTRY(sys_clone) + SAVE_SWITCH_STACK + pea %sp@(SWITCH_STACK_SIZE) + jbsr m68k_clone + addql #4,%sp + RESTORE_SWITCH_STACK + rts + +ENTRY(sys_vfork) + SAVE_SWITCH_STACK + pea %sp@(SWITCH_STACK_SIZE) + jbsr m68k_vfork + addql #4,%sp + RESTORE_SWITCH_STACK + rts + +ENTRY(sys_sigreturn) + SAVE_SWITCH_STACK + jbsr do_sigreturn + RESTORE_SWITCH_STACK + rts + +ENTRY(sys_rt_sigreturn) + SAVE_SWITCH_STACK + jbsr do_rt_sigreturn + RESTORE_SWITCH_STACK + rts + +resume: + /* + * Beware - when entering resume, prev (the current task) is + * in a0, next (the new task) is in a1,so don't change these + * registers until their contents are no longer needed. + */ + + /* save sr */ + movew %sr,%a0@(TASK_THREAD+THREAD_SR) + + /* save fs (sfc,%dfc) (may be pointing to kernel memory) */ + movec %sfc,%d0 + movew %d0,%a0@(TASK_THREAD+THREAD_FS) + + /* save usp */ + /* it is better to use a movel here instead of a movew 8*) */ + movec %usp,%d0 + movel %d0,%a0@(TASK_THREAD+THREAD_USP) + + /* save non-scratch registers on stack */ + SAVE_SWITCH_STACK + + /* save current kernel stack pointer */ + movel %sp,%a0@(TASK_THREAD+THREAD_KSP) + + /* save floating point context */ +#ifndef CONFIG_M68KFPU_EMU_ONLY +#ifdef CONFIG_M68KFPU_EMU + tstl m68k_fputype + jeq 3f +#endif + fsave %a0@(TASK_THREAD+THREAD_FPSTATE) + +#if defined(CONFIG_M68060) +#if !defined(CPU_M68060_ONLY) + btst #3,m68k_cputype+3 + beqs 1f +#endif + /* The 060 FPU keeps status in bits 15-8 of the first longword */ + tstb %a0@(TASK_THREAD+THREAD_FPSTATE+2) + jeq 3f +#if !defined(CPU_M68060_ONLY) + jra 2f +#endif +#endif /* CONFIG_M68060 */ +#if !defined(CPU_M68060_ONLY) +1: tstb %a0@(TASK_THREAD+THREAD_FPSTATE) + jeq 3f +#endif +2: fmovemx %fp0-%fp7,%a0@(TASK_THREAD+THREAD_FPREG) + fmoveml %fpcr/%fpsr/%fpiar,%a0@(TASK_THREAD+THREAD_FPCNTL) +3: +#endif /* CONFIG_M68KFPU_EMU_ONLY */ + /* Return previous task in %d1 */ + movel %curptr,%d1 + + /* switch to new task (a1 contains new task) */ + movel %a1,%curptr + + /* restore floating point context */ +#ifndef CONFIG_M68KFPU_EMU_ONLY +#ifdef CONFIG_M68KFPU_EMU + tstl m68k_fputype + jeq 4f +#endif +#if defined(CONFIG_M68060) +#if !defined(CPU_M68060_ONLY) + btst #3,m68k_cputype+3 + beqs 1f +#endif + /* The 060 FPU keeps status in bits 15-8 of the first longword */ + tstb %a1@(TASK_THREAD+THREAD_FPSTATE+2) + jeq 3f +#if !defined(CPU_M68060_ONLY) + jra 2f +#endif +#endif /* CONFIG_M68060 */ +#if !defined(CPU_M68060_ONLY) +1: tstb %a1@(TASK_THREAD+THREAD_FPSTATE) + jeq 3f +#endif +2: fmovemx %a1@(TASK_THREAD+THREAD_FPREG),%fp0-%fp7 + fmoveml %a1@(TASK_THREAD+THREAD_FPCNTL),%fpcr/%fpsr/%fpiar +3: frestore %a1@(TASK_THREAD+THREAD_FPSTATE) +4: +#endif /* CONFIG_M68KFPU_EMU_ONLY */ + + /* restore the kernel stack pointer */ + movel %a1@(TASK_THREAD+THREAD_KSP),%sp + + /* restore non-scratch registers */ + RESTORE_SWITCH_STACK + + /* restore user stack pointer */ + movel %a1@(TASK_THREAD+THREAD_USP),%a0 + movel %a0,%usp + + /* restore fs (sfc,%dfc) */ + movew %a1@(TASK_THREAD+THREAD_FS),%a0 + movec %a0,%sfc + movec %a0,%dfc + + /* restore status register */ + movew %a1@(TASK_THREAD+THREAD_SR),%sr + + rts + +.data +ALIGN +sys_call_table: + .long sys_restart_syscall /* 0 - old "setup()" system call, used for restarting */ + .long sys_exit + .long sys_fork + .long sys_read + .long sys_write + .long sys_open /* 5 */ + .long sys_close + .long sys_waitpid + .long sys_creat + .long sys_link + .long sys_unlink /* 10 */ + .long sys_execve + .long sys_chdir + .long sys_time + .long sys_mknod + .long sys_chmod /* 15 */ + .long sys_chown16 + .long sys_ni_syscall /* old break syscall holder */ + .long sys_stat + .long sys_lseek + .long sys_getpid /* 20 */ + .long sys_mount + .long sys_oldumount + .long sys_setuid16 + .long sys_getuid16 + .long sys_stime /* 25 */ + .long sys_ptrace + .long sys_alarm + .long sys_fstat + .long sys_pause + .long sys_utime /* 30 */ + .long sys_ni_syscall /* old stty syscall holder */ + .long sys_ni_syscall /* old gtty syscall holder */ + .long sys_access + .long sys_nice + .long sys_ni_syscall /* 35 */ /* old ftime syscall holder */ + .long sys_sync + .long sys_kill + .long sys_rename + .long sys_mkdir + .long sys_rmdir /* 40 */ + .long sys_dup + .long sys_pipe + .long sys_times + .long sys_ni_syscall /* old prof syscall holder */ + .long sys_brk /* 45 */ + .long sys_setgid16 + .long sys_getgid16 + .long sys_signal + .long sys_geteuid16 + .long sys_getegid16 /* 50 */ + .long sys_acct + .long sys_umount /* recycled never used phys() */ + .long sys_ni_syscall /* old lock syscall holder */ + .long sys_ioctl + .long sys_fcntl /* 55 */ + .long sys_ni_syscall /* old mpx syscall holder */ + .long sys_setpgid + .long sys_ni_syscall /* old ulimit syscall holder */ + .long sys_ni_syscall + .long sys_umask /* 60 */ + .long sys_chroot + .long sys_ustat + .long sys_dup2 + .long sys_getppid + .long sys_getpgrp /* 65 */ + .long sys_setsid + .long sys_sigaction + .long sys_sgetmask + .long sys_ssetmask + .long sys_setreuid16 /* 70 */ + .long sys_setregid16 + .long sys_sigsuspend + .long sys_sigpending + .long sys_sethostname + .long sys_setrlimit /* 75 */ + .long sys_old_getrlimit + .long sys_getrusage + .long sys_gettimeofday + .long sys_settimeofday + .long sys_getgroups16 /* 80 */ + .long sys_setgroups16 + .long sys_old_select + .long sys_symlink + .long sys_lstat + .long sys_readlink /* 85 */ + .long sys_uselib + .long sys_swapon + .long sys_reboot + .long sys_old_readdir + .long sys_old_mmap /* 90 */ + .long sys_munmap + .long sys_truncate + .long sys_ftruncate + .long sys_fchmod + .long sys_fchown16 /* 95 */ + .long sys_getpriority + .long sys_setpriority + .long sys_ni_syscall /* old profil syscall holder */ + .long sys_statfs + .long sys_fstatfs /* 100 */ + .long sys_ni_syscall /* ioperm for i386 */ + .long sys_socketcall + .long sys_syslog + .long sys_setitimer + .long sys_getitimer /* 105 */ + .long sys_newstat + .long sys_newlstat + .long sys_newfstat + .long sys_ni_syscall + .long sys_ni_syscall /* 110 */ /* iopl for i386 */ + .long sys_vhangup + .long sys_ni_syscall /* obsolete idle() syscall */ + .long sys_ni_syscall /* vm86old for i386 */ + .long sys_wait4 + .long sys_swapoff /* 115 */ + .long sys_sysinfo + .long sys_ipc + .long sys_fsync + .long sys_sigreturn + .long sys_clone /* 120 */ + .long sys_setdomainname + .long sys_newuname + .long sys_cacheflush /* modify_ldt for i386 */ + .long sys_adjtimex + .long sys_mprotect /* 125 */ + .long sys_sigprocmask + .long sys_ni_syscall /* old "create_module" */ + .long sys_init_module + .long sys_delete_module + .long sys_ni_syscall /* 130 - old "get_kernel_syms" */ + .long sys_quotactl + .long sys_getpgid + .long sys_fchdir + .long sys_bdflush + .long sys_sysfs /* 135 */ + .long sys_personality + .long sys_ni_syscall /* for afs_syscall */ + .long sys_setfsuid16 + .long sys_setfsgid16 + .long sys_llseek /* 140 */ + .long sys_getdents + .long sys_select + .long sys_flock + .long sys_msync + .long sys_readv /* 145 */ + .long sys_writev + .long sys_getsid + .long sys_fdatasync + .long sys_sysctl + .long sys_mlock /* 150 */ + .long sys_munlock + .long sys_mlockall + .long sys_munlockall + .long sys_sched_setparam + .long sys_sched_getparam /* 155 */ + .long sys_sched_setscheduler + .long sys_sched_getscheduler + .long sys_sched_yield + .long sys_sched_get_priority_max + .long sys_sched_get_priority_min /* 160 */ + .long sys_sched_rr_get_interval + .long sys_nanosleep + .long sys_mremap + .long sys_setresuid16 + .long sys_getresuid16 /* 165 */ + .long sys_getpagesize + .long sys_ni_syscall /* old sys_query_module */ + .long sys_poll + .long sys_nfsservctl + .long sys_setresgid16 /* 170 */ + .long sys_getresgid16 + .long sys_prctl + .long sys_rt_sigreturn + .long sys_rt_sigaction + .long sys_rt_sigprocmask /* 175 */ + .long sys_rt_sigpending + .long sys_rt_sigtimedwait + .long sys_rt_sigqueueinfo + .long sys_rt_sigsuspend + .long sys_pread64 /* 180 */ + .long sys_pwrite64 + .long sys_lchown16; + .long sys_getcwd + .long sys_capget + .long sys_capset /* 185 */ + .long sys_sigaltstack + .long sys_sendfile + .long sys_ni_syscall /* streams1 */ + .long sys_ni_syscall /* streams2 */ + .long sys_vfork /* 190 */ + .long sys_getrlimit + .long sys_mmap2 + .long sys_truncate64 + .long sys_ftruncate64 + .long sys_stat64 /* 195 */ + .long sys_lstat64 + .long sys_fstat64 + .long sys_chown + .long sys_getuid + .long sys_getgid /* 200 */ + .long sys_geteuid + .long sys_getegid + .long sys_setreuid + .long sys_setregid + .long sys_getgroups /* 205 */ + .long sys_setgroups + .long sys_fchown + .long sys_setresuid + .long sys_getresuid + .long sys_setresgid /* 210 */ + .long sys_getresgid + .long sys_lchown + .long sys_setuid + .long sys_setgid + .long sys_setfsuid /* 215 */ + .long sys_setfsgid + .long sys_pivot_root + .long sys_ni_syscall + .long sys_ni_syscall + .long sys_getdents64 /* 220 */ + .long sys_gettid + .long sys_tkill + .long sys_setxattr + .long sys_lsetxattr + .long sys_fsetxattr /* 225 */ + .long sys_getxattr + .long sys_lgetxattr + .long sys_fgetxattr + .long sys_listxattr + .long sys_llistxattr /* 230 */ + .long sys_flistxattr + .long sys_removexattr + .long sys_lremovexattr + .long sys_fremovexattr + .long sys_futex /* 235 */ + .long sys_sendfile64 + .long sys_mincore + .long sys_madvise + .long sys_fcntl64 + .long sys_readahead /* 240 */ + .long sys_io_setup + .long sys_io_destroy + .long sys_io_getevents + .long sys_io_submit + .long sys_io_cancel /* 245 */ + .long sys_fadvise64 + .long sys_exit_group + .long sys_lookup_dcookie + .long sys_epoll_create + .long sys_epoll_ctl /* 250 */ + .long sys_epoll_wait + .long sys_remap_file_pages + .long sys_set_tid_address + .long sys_timer_create + .long sys_timer_settime /* 255 */ + .long sys_timer_gettime + .long sys_timer_getoverrun + .long sys_timer_delete + .long sys_clock_settime + .long sys_clock_gettime /* 260 */ + .long sys_clock_getres + .long sys_clock_nanosleep + .long sys_statfs64 + .long sys_fstatfs64 + .long sys_tgkill /* 265 */ + .long sys_utimes + .long sys_fadvise64_64 + .long sys_mbind + .long sys_get_mempolicy + .long sys_set_mempolicy /* 270 */ + .long sys_mq_open + .long sys_mq_unlink + .long sys_mq_timedsend + .long sys_mq_timedreceive + .long sys_mq_notify /* 275 */ + .long sys_mq_getsetattr + .long sys_waitid + .long sys_ni_syscall /* for sys_vserver */ + .long sys_add_key + .long sys_request_key /* 280 */ + .long sys_keyctl + .long sys_ioprio_set + .long sys_ioprio_get + .long sys_inotify_init + .long sys_inotify_add_watch /* 285 */ + .long sys_inotify_rm_watch + .long sys_migrate_pages + .long sys_openat + .long sys_mkdirat + .long sys_mknodat /* 290 */ + .long sys_fchownat + .long sys_futimesat + .long sys_fstatat64 + .long sys_unlinkat + .long sys_renameat /* 295 */ + .long sys_linkat + .long sys_symlinkat + .long sys_readlinkat + .long sys_fchmodat + .long sys_faccessat /* 300 */ + .long sys_ni_syscall /* Reserved for pselect6 */ + .long sys_ni_syscall /* Reserved for ppoll */ + .long sys_unshare + .long sys_set_robust_list + .long sys_get_robust_list /* 305 */ + .long sys_splice + .long sys_sync_file_range + .long sys_tee + .long sys_vmsplice + .long sys_move_pages /* 310 */ + .long sys_sched_setaffinity + .long sys_sched_getaffinity + .long sys_kexec_load + .long sys_getcpu + .long sys_epoll_pwait /* 315 */ + .long sys_utimensat + .long sys_signalfd + .long sys_timerfd_create + .long sys_eventfd + .long sys_fallocate /* 320 */ + .long sys_timerfd_settime + .long sys_timerfd_gettime + .long sys_signalfd4 + .long sys_eventfd2 + .long sys_epoll_create1 /* 325 */ + .long sys_dup3 + .long sys_pipe2 + .long sys_inotify_init1 + .long sys_preadv + .long sys_pwritev /* 330 */ + .long sys_rt_tgsigqueueinfo + .long sys_perf_event_open + .long sys_get_thread_area + .long sys_set_thread_area + .long sys_atomic_cmpxchg_32 /* 335 */ + .long sys_atomic_barrier + .long sys_fanotify_init + .long sys_fanotify_mark + .long sys_prlimit64 + .long sys_name_to_handle_at /* 340 */ + .long sys_open_by_handle_at + .long sys_clock_adjtime + .long sys_syncfs + diff --git a/arch/m68k/kernel/entry_no.S b/arch/m68k/kernel/entry_no.S new file mode 100644 index 0000000..2783f25 --- /dev/null +++ b/arch/m68k/kernel/entry_no.S @@ -0,0 +1,134 @@ +/* + * linux/arch/m68knommu/kernel/entry.S + * + * Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com) + * Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>, + * Kenneth Albanowski <kjahds@kjahds.com>, + * Copyright (C) 2000 Lineo Inc. (www.lineo.com) + * + * Based on: + * + * linux/arch/m68k/kernel/entry.S + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file README.legal in the main directory of this archive + * for more details. + * + * Linux/m68k support by Hamish Macdonald + * + * 68060 fixes by Jesper Skov + * ColdFire support by Greg Ungerer (gerg@snapgear.com) + * 5307 fixes by David W. Miller + * linux 2.4 support David McCullough <davidm@snapgear.com> + */ + +#include <linux/sys.h> +#include <linux/linkage.h> +#include <asm/errno.h> +#include <asm/setup.h> +#include <asm/segment.h> +#include <asm/asm-offsets.h> +#include <asm/entry.h> +#include <asm/unistd.h> + +.text + +.globl buserr +.globl trap +.globl ret_from_exception +.globl ret_from_signal +.globl sys_fork +.globl sys_clone +.globl sys_vfork + +ENTRY(buserr) + SAVE_ALL + moveq #-1,%d0 + movel %d0,%sp@(PT_OFF_ORIG_D0) + movel %sp,%sp@- /* stack frame pointer argument */ + jsr buserr_c + addql #4,%sp + jra ret_from_exception + +ENTRY(trap) + SAVE_ALL + moveq #-1,%d0 + movel %d0,%sp@(PT_OFF_ORIG_D0) + movel %sp,%sp@- /* stack frame pointer argument */ + jsr trap_c + addql #4,%sp + jra ret_from_exception + +#ifdef TRAP_DBG_INTERRUPT + +.globl dbginterrupt +ENTRY(dbginterrupt) + SAVE_ALL + moveq #-1,%d0 + movel %d0,%sp@(PT_OFF_ORIG_D0) + movel %sp,%sp@- /* stack frame pointer argument */ + jsr dbginterrupt_c + addql #4,%sp + jra ret_from_exception +#endif + +ENTRY(reschedule) + /* save top of frame */ + pea %sp@ + jbsr set_esp0 + addql #4,%sp + pea ret_from_exception + jmp schedule + +ENTRY(ret_from_fork) + movel %d1,%sp@- + jsr schedule_tail + addql #4,%sp + jra ret_from_exception + +ENTRY(sys_fork) + SAVE_SWITCH_STACK + pea %sp@(SWITCH_STACK_SIZE) + jbsr m68k_fork + addql #4,%sp + RESTORE_SWITCH_STACK + rts + +ENTRY(sys_vfork) + SAVE_SWITCH_STACK + pea %sp@(SWITCH_STACK_SIZE) + jbsr m68k_vfork + addql #4,%sp + RESTORE_SWITCH_STACK + rts + +ENTRY(sys_clone) + SAVE_SWITCH_STACK + pea %sp@(SWITCH_STACK_SIZE) + jbsr m68k_clone + addql #4,%sp + RESTORE_SWITCH_STACK + rts + +ENTRY(sys_sigreturn) + SAVE_SWITCH_STACK + jbsr do_sigreturn + RESTORE_SWITCH_STACK + rts + +ENTRY(sys_rt_sigreturn) + SAVE_SWITCH_STACK + jbsr do_rt_sigreturn + RESTORE_SWITCH_STACK + rts + +ENTRY(ret_from_user_signal) + moveq #__NR_sigreturn,%d0 + trap #0 + +ENTRY(ret_from_user_rt_signal) + movel #__NR_rt_sigreturn,%d0 + trap #0 + diff --git a/arch/m68k/kernel/head.S b/arch/m68k/kernel/head.S index ef54128..27622b3 100644 --- a/arch/m68k/kernel/head.S +++ b/arch/m68k/kernel/head.S @@ -134,7 +134,7 @@ * Thanks to a small helping routine enabling the mmu got quite simple * and there is only one way left. mmu_engage makes a complete a new mapping * that only includes the absolute necessary to be able to jump to the final - * postion and to restore the original mapping. + * position and to restore the original mapping. * As this code doesn't need a transparent translation register anymore this * means all registers are free to be used by machines that needs them for * other purposes. @@ -969,7 +969,7 @@ L(mmu_init_amiga): is_not_040_or_060(1f) /* - * 040: Map the 16Meg range physical 0x0 upto logical 0x8000.0000 + * 040: Map the 16Meg range physical 0x0 up to logical 0x8000.0000 */ mmu_map #0x80000000,#0,#0x01000000,#_PAGE_NOCACHE_S /* @@ -982,7 +982,7 @@ L(mmu_init_amiga): 1: /* - * 030: Map the 32Meg range physical 0x0 upto logical 0x8000.0000 + * 030: Map the 32Meg range physical 0x0 up to logical 0x8000.0000 */ mmu_map #0x80000000,#0,#0x02000000,#_PAGE_NOCACHE030 mmu_map_tt #1,#0x40000000,#0x20000000,#_PAGE_NOCACHE030 @@ -1074,7 +1074,7 @@ L(notq40): is_040(1f) /* - * 030: Map the 32Meg range physical 0x0 upto logical 0xf000.0000 + * 030: Map the 32Meg range physical 0x0 up to logical 0xf000.0000 */ mmu_map #0xf0000000,#0,#0x02000000,#_PAGE_NOCACHE030 @@ -1082,7 +1082,7 @@ L(notq40): 1: /* - * 040: Map the 16Meg range physical 0x0 upto logical 0xf000.0000 + * 040: Map the 16Meg range physical 0x0 up to logical 0xf000.0000 */ mmu_map #0xf0000000,#0,#0x01000000,#_PAGE_NOCACHE_S @@ -3078,7 +3078,7 @@ func_start serial_putc,%d0/%d1/%a0/%a1 /* * If the loader gave us a board type then we can use that to * select an appropriate output routine; otherwise we just use - * the Bug code. If we haev to use the Bug that means the Bug + * the Bug code. If we have to use the Bug that means the Bug * workspace has to be valid, which means the Bug has to use * the SRAM, which is non-standard. */ diff --git a/arch/m68k/kernel/init_task.c b/arch/m68k/kernel/init_task.c new file mode 100644 index 0000000..cbf9dc3 --- /dev/null +++ b/arch/m68k/kernel/init_task.c @@ -0,0 +1,36 @@ +/* + * linux/arch/m68knommu/kernel/init_task.c + */ +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/init.h> +#include <linux/init_task.h> +#include <linux/fs.h> +#include <linux/mqueue.h> + +#include <asm/uaccess.h> +#include <asm/pgtable.h> + +static struct signal_struct init_signals = INIT_SIGNALS(init_signals); +static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); +/* + * Initial task structure. + * + * All other task structs will be allocated on slabs in fork.c + */ +__asm__(".align 4"); +struct task_struct init_task = INIT_TASK(init_task); + +EXPORT_SYMBOL(init_task); + +/* + * Initial thread structure. + * + * We need to make sure that this is 8192-byte aligned due to the + * way process stacks are handled. This is done by having a special + * "init_task" linker map entry.. + */ +union thread_union init_thread_union __init_task_data = + { INIT_THREAD_INFO(init_task) }; + diff --git a/arch/m68k/kernel/irq.c b/arch/m68k/kernel/irq.c new file mode 100644 index 0000000..15dbc3e --- /dev/null +++ b/arch/m68k/kernel/irq.c @@ -0,0 +1,58 @@ +/* + * irq.c + * + * (C) Copyright 2007, Greg Ungerer <gerg@snapgear.com> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/types.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/kernel_stat.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/seq_file.h> +#include <asm/system.h> +#include <asm/traps.h> + +asmlinkage void do_IRQ(int irq, struct pt_regs *regs) +{ + struct pt_regs *oldregs = set_irq_regs(regs); + + irq_enter(); + generic_handle_irq(irq); + irq_exit(); + + set_irq_regs(oldregs); +} + +int show_interrupts(struct seq_file *p, void *v) +{ + struct irqaction *ap; + int irq = *((loff_t *) v); + + if (irq == 0) + seq_puts(p, " CPU0\n"); + + if (irq < NR_IRQS) { + struct irq_desc *desc = irq_to_desc(irq); + + ap = desc->action; + if (ap) { + seq_printf(p, "%3d: ", irq); + seq_printf(p, "%10u ", kstat_irqs(irq)); + seq_printf(p, "%14s ", irq_desc_get_chip(desc)->name); + + seq_printf(p, "%s", ap->name); + for (ap = ap->next; ap; ap = ap->next) + seq_printf(p, ", %s", ap->name); + seq_putc(p, '\n'); + } + } + + return 0; +} + diff --git a/arch/m68k/kernel/m68k_ksyms.c b/arch/m68k/kernel/m68k_ksyms.c index d900e77..4752c28 100644 --- a/arch/m68k/kernel/m68k_ksyms.c +++ b/arch/m68k/kernel/m68k_ksyms.c @@ -1,16 +1,5 @@ -#include <linux/module.h> - -asmlinkage long long __ashldi3 (long long, int); -asmlinkage long long __ashrdi3 (long long, int); -asmlinkage long long __lshrdi3 (long long, int); -asmlinkage long long __muldi3 (long long, long long); - -/* The following are special because they're not called - explicitly (the C compiler generates them). Fortunately, - their interface isn't gonna change any time soon now, so - it's OK to leave it out of version control. */ -EXPORT_SYMBOL(__ashldi3); -EXPORT_SYMBOL(__ashrdi3); -EXPORT_SYMBOL(__lshrdi3); -EXPORT_SYMBOL(__muldi3); - +#ifdef CONFIG_MMU +#include "m68k_ksyms_mm.c" +#else +#include "m68k_ksyms_no.c" +#endif diff --git a/arch/m68k/kernel/m68k_ksyms_mm.c b/arch/m68k/kernel/m68k_ksyms_mm.c new file mode 100644 index 0000000..d900e77 --- /dev/null +++ b/arch/m68k/kernel/m68k_ksyms_mm.c @@ -0,0 +1,16 @@ +#include <linux/module.h> + +asmlinkage long long __ashldi3 (long long, int); +asmlinkage long long __ashrdi3 (long long, int); +asmlinkage long long __lshrdi3 (long long, int); +asmlinkage long long __muldi3 (long long, long long); + +/* The following are special because they're not called + explicitly (the C compiler generates them). Fortunately, + their interface isn't gonna change any time soon now, so + it's OK to leave it out of version control. */ +EXPORT_SYMBOL(__ashldi3); +EXPORT_SYMBOL(__ashrdi3); +EXPORT_SYMBOL(__lshrdi3); +EXPORT_SYMBOL(__muldi3); + diff --git a/arch/m68k/kernel/m68k_ksyms_no.c b/arch/m68k/kernel/m68k_ksyms_no.c new file mode 100644 index 0000000..39fe0a7 --- /dev/null +++ b/arch/m68k/kernel/m68k_ksyms_no.c @@ -0,0 +1,78 @@ +#include <linux/module.h> +#include <linux/linkage.h> +#include <linux/sched.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/user.h> +#include <linux/elfcore.h> +#include <linux/in6.h> +#include <linux/interrupt.h> + +#include <asm/setup.h> +#include <asm/machdep.h> +#include <asm/pgalloc.h> +#include <asm/irq.h> +#include <asm/io.h> +#include <asm/checksum.h> +#include <asm/current.h> + +extern int dump_fpu(struct pt_regs *, elf_fpregset_t *); + +/* platform dependent support */ + +EXPORT_SYMBOL(__ioremap); +EXPORT_SYMBOL(iounmap); +EXPORT_SYMBOL(dump_fpu); + +EXPORT_SYMBOL(ip_fast_csum); + +EXPORT_SYMBOL(kernel_thread); + +/* Networking helper routines. */ +EXPORT_SYMBOL(csum_partial_copy_nocheck); + +/* The following are special because they're not called + explicitly (the C compiler generates them). Fortunately, + their interface isn't gonna change any time soon now, so + it's OK to leave it out of version control. */ +EXPORT_SYMBOL(memcpy); +EXPORT_SYMBOL(memset); + +/* + * libgcc functions - functions that are used internally by the + * compiler... (prototypes are not correct though, but that + * doesn't really matter since they're not versioned). + */ +extern void __ashldi3(void); +extern void __ashrdi3(void); +extern void __divsi3(void); +extern void __lshrdi3(void); +extern void __modsi3(void); +extern void __muldi3(void); +extern void __mulsi3(void); +extern void __udivsi3(void); +extern void __umodsi3(void); + + /* gcc lib functions */ +EXPORT_SYMBOL(__ashldi3); +EXPORT_SYMBOL(__ashrdi3); +EXPORT_SYMBOL(__divsi3); +EXPORT_SYMBOL(__lshrdi3); +EXPORT_SYMBOL(__modsi3); +EXPORT_SYMBOL(__muldi3); +EXPORT_SYMBOL(__mulsi3); +EXPORT_SYMBOL(__udivsi3); +EXPORT_SYMBOL(__umodsi3); + +#ifdef CONFIG_COLDFIRE +extern unsigned int *dma_device_address; +extern unsigned long dma_base_addr, _ramend; +EXPORT_SYMBOL(dma_base_addr); +EXPORT_SYMBOL(dma_device_address); +EXPORT_SYMBOL(_ramend); + +extern asmlinkage void trap(void); +extern void *_ramvec; +EXPORT_SYMBOL(trap); +EXPORT_SYMBOL(_ramvec); +#endif /* CONFIG_COLDFIRE */ diff --git a/arch/m68k/kernel/module.c b/arch/m68k/kernel/module.c index cd6bcb1c9..7ea203c 100644 --- a/arch/m68k/kernel/module.c +++ b/arch/m68k/kernel/module.c @@ -1,155 +1,5 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file COPYING in the main directory of this archive - * for more details. - */ - -#include <linux/moduleloader.h> -#include <linux/elf.h> -#include <linux/vmalloc.h> -#include <linux/fs.h> -#include <linux/string.h> -#include <linux/kernel.h> - -#if 0 -#define DEBUGP printk +#ifdef CONFIG_MMU +#include "module_mm.c" #else -#define DEBUGP(fmt...) +#include "module_no.c" #endif - -#ifdef CONFIG_MODULES - -void *module_alloc(unsigned long size) -{ - if (size == 0) - return NULL; - return vmalloc(size); -} - - -/* Free memory returned from module_alloc */ -void module_free(struct module *mod, void *module_region) -{ - vfree(module_region); -} - -/* We don't need anything special. */ -int module_frob_arch_sections(Elf_Ehdr *hdr, - Elf_Shdr *sechdrs, - char *secstrings, - struct module *mod) -{ - return 0; -} - -int apply_relocate(Elf32_Shdr *sechdrs, - const char *strtab, - unsigned int symindex, - unsigned int relsec, - struct module *me) -{ - unsigned int i; - Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr; - Elf32_Sym *sym; - uint32_t *location; - - DEBUGP("Applying relocate section %u to %u\n", relsec, - sechdrs[relsec].sh_info); - for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { - /* This is where to make the change */ - location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr - + rel[i].r_offset; - /* This is the symbol it is referring to. Note that all - undefined symbols have been resolved. */ - sym = (Elf32_Sym *)sechdrs[symindex].sh_addr - + ELF32_R_SYM(rel[i].r_info); - - switch (ELF32_R_TYPE(rel[i].r_info)) { - case R_68K_32: - /* We add the value into the location given */ - *location += sym->st_value; - break; - case R_68K_PC32: - /* Add the value, subtract its postition */ - *location += sym->st_value - (uint32_t)location; - break; - default: - printk(KERN_ERR "module %s: Unknown relocation: %u\n", - me->name, ELF32_R_TYPE(rel[i].r_info)); - return -ENOEXEC; - } - } - return 0; -} - -int apply_relocate_add(Elf32_Shdr *sechdrs, - const char *strtab, - unsigned int symindex, - unsigned int relsec, - struct module *me) -{ - unsigned int i; - Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr; - Elf32_Sym *sym; - uint32_t *location; - - DEBUGP("Applying relocate_add section %u to %u\n", relsec, - sechdrs[relsec].sh_info); - for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { - /* This is where to make the change */ - location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr - + rel[i].r_offset; - /* This is the symbol it is referring to. Note that all - undefined symbols have been resolved. */ - sym = (Elf32_Sym *)sechdrs[symindex].sh_addr - + ELF32_R_SYM(rel[i].r_info); - - switch (ELF32_R_TYPE(rel[i].r_info)) { - case R_68K_32: - /* We add the value into the location given */ - *location = rel[i].r_addend + sym->st_value; - break; - case R_68K_PC32: - /* Add the value, subtract its postition */ - *location = rel[i].r_addend + sym->st_value - (uint32_t)location; - break; - default: - printk(KERN_ERR "module %s: Unknown relocation: %u\n", - me->name, ELF32_R_TYPE(rel[i].r_info)); - return -ENOEXEC; - } - } - return 0; -} - -int module_finalize(const Elf_Ehdr *hdr, - const Elf_Shdr *sechdrs, - struct module *mod) -{ - module_fixup(mod, mod->arch.fixup_start, mod->arch.fixup_end); - - return 0; -} - -void module_arch_cleanup(struct module *mod) -{ -} - -#endif /* CONFIG_MODULES */ - -void module_fixup(struct module *mod, struct m68k_fixup_info *start, - struct m68k_fixup_info *end) -{ - struct m68k_fixup_info *fixup; - - for (fixup = start; fixup < end; fixup++) { - switch (fixup->type) { - case m68k_fixup_memoffset: - *(u32 *)fixup->addr = m68k_memoffset; - break; - case m68k_fixup_vnode_shift: - *(u16 *)fixup->addr += m68k_virt_to_node_shift; - break; - } - } -} diff --git a/arch/m68k/kernel/module_mm.c b/arch/m68k/kernel/module_mm.c new file mode 100644 index 0000000..cd6bcb1c9 --- /dev/null +++ b/arch/m68k/kernel/module_mm.c @@ -0,0 +1,155 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/moduleloader.h> +#include <linux/elf.h> +#include <linux/vmalloc.h> +#include <linux/fs.h> +#include <linux/string.h> +#include <linux/kernel.h> + +#if 0 +#define DEBUGP printk +#else +#define DEBUGP(fmt...) +#endif + +#ifdef CONFIG_MODULES + +void *module_alloc(unsigned long size) +{ + if (size == 0) + return NULL; + return vmalloc(size); +} + + +/* Free memory returned from module_alloc */ +void module_free(struct module *mod, void *module_region) +{ + vfree(module_region); +} + +/* We don't need anything special. */ +int module_frob_arch_sections(Elf_Ehdr *hdr, + Elf_Shdr *sechdrs, + char *secstrings, + struct module *mod) +{ + return 0; +} + +int apply_relocate(Elf32_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ + unsigned int i; + Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr; + Elf32_Sym *sym; + uint32_t *location; + + DEBUGP("Applying relocate section %u to %u\n", relsec, + sechdrs[relsec].sh_info); + for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { + /* This is where to make the change */ + location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr + + rel[i].r_offset; + /* This is the symbol it is referring to. Note that all + undefined symbols have been resolved. */ + sym = (Elf32_Sym *)sechdrs[symindex].sh_addr + + ELF32_R_SYM(rel[i].r_info); + + switch (ELF32_R_TYPE(rel[i].r_info)) { + case R_68K_32: + /* We add the value into the location given */ + *location += sym->st_value; + break; + case R_68K_PC32: + /* Add the value, subtract its postition */ + *location += sym->st_value - (uint32_t)location; + break; + default: + printk(KERN_ERR "module %s: Unknown relocation: %u\n", + me->name, ELF32_R_TYPE(rel[i].r_info)); + return -ENOEXEC; + } + } + return 0; +} + +int apply_relocate_add(Elf32_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ + unsigned int i; + Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr; + Elf32_Sym *sym; + uint32_t *location; + + DEBUGP("Applying relocate_add section %u to %u\n", relsec, + sechdrs[relsec].sh_info); + for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { + /* This is where to make the change */ + location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr + + rel[i].r_offset; + /* This is the symbol it is referring to. Note that all + undefined symbols have been resolved. */ + sym = (Elf32_Sym *)sechdrs[symindex].sh_addr + + ELF32_R_SYM(rel[i].r_info); + + switch (ELF32_R_TYPE(rel[i].r_info)) { + case R_68K_32: + /* We add the value into the location given */ + *location = rel[i].r_addend + sym->st_value; + break; + case R_68K_PC32: + /* Add the value, subtract its postition */ + *location = rel[i].r_addend + sym->st_value - (uint32_t)location; + break; + default: + printk(KERN_ERR "module %s: Unknown relocation: %u\n", + me->name, ELF32_R_TYPE(rel[i].r_info)); + return -ENOEXEC; + } + } + return 0; +} + +int module_finalize(const Elf_Ehdr *hdr, + const Elf_Shdr *sechdrs, + struct module *mod) +{ + module_fixup(mod, mod->arch.fixup_start, mod->arch.fixup_end); + + return 0; +} + +void module_arch_cleanup(struct module *mod) +{ +} + +#endif /* CONFIG_MODULES */ + +void module_fixup(struct module *mod, struct m68k_fixup_info *start, + struct m68k_fixup_info *end) +{ + struct m68k_fixup_info *fixup; + + for (fixup = start; fixup < end; fixup++) { + switch (fixup->type) { + case m68k_fixup_memoffset: + *(u32 *)fixup->addr = m68k_memoffset; + break; + case m68k_fixup_vnode_shift: + *(u16 *)fixup->addr += m68k_virt_to_node_shift; + break; + } + } +} diff --git a/arch/m68k/kernel/module_no.c b/arch/m68k/kernel/module_no.c new file mode 100644 index 0000000..d11ffae --- /dev/null +++ b/arch/m68k/kernel/module_no.c @@ -0,0 +1,126 @@ +#include <linux/moduleloader.h> +#include <linux/elf.h> +#include <linux/vmalloc.h> +#include <linux/fs.h> +#include <linux/string.h> +#include <linux/kernel.h> + +#if 0 +#define DEBUGP printk +#else +#define DEBUGP(fmt...) +#endif + +void *module_alloc(unsigned long size) +{ + if (size == 0) + return NULL; + return vmalloc(size); +} + + +/* Free memory returned from module_alloc */ +void module_free(struct module *mod, void *module_region) +{ + vfree(module_region); +} + +/* We don't need anything special. */ +int module_frob_arch_sections(Elf_Ehdr *hdr, + Elf_Shdr *sechdrs, + char *secstrings, + struct module *mod) +{ + return 0; +} + +int apply_relocate(Elf32_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ + unsigned int i; + Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr; + Elf32_Sym *sym; + uint32_t *location; + + DEBUGP("Applying relocate section %u to %u\n", relsec, + sechdrs[relsec].sh_info); + for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { + /* This is where to make the change */ + location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr + + rel[i].r_offset; + /* This is the symbol it is referring to. Note that all + undefined symbols have been resolved. */ + sym = (Elf32_Sym *)sechdrs[symindex].sh_addr + + ELF32_R_SYM(rel[i].r_info); + + switch (ELF32_R_TYPE(rel[i].r_info)) { + case R_68K_32: + /* We add the value into the location given */ + *location += sym->st_value; + break; + case R_68K_PC32: + /* Add the value, subtract its postition */ + *location += sym->st_value - (uint32_t)location; + break; + default: + printk(KERN_ERR "module %s: Unknown relocation: %u\n", + me->name, ELF32_R_TYPE(rel[i].r_info)); + return -ENOEXEC; + } + } + return 0; +} + +int apply_relocate_add(Elf32_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ + unsigned int i; + Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr; + Elf32_Sym *sym; + uint32_t *location; + + DEBUGP("Applying relocate_add section %u to %u\n", relsec, + sechdrs[relsec].sh_info); + for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { + /* This is where to make the change */ + location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr + + rel[i].r_offset; + /* This is the symbol it is referring to. Note that all + undefined symbols have been resolved. */ + sym = (Elf32_Sym *)sechdrs[symindex].sh_addr + + ELF32_R_SYM(rel[i].r_info); + + switch (ELF32_R_TYPE(rel[i].r_info)) { + case R_68K_32: + /* We add the value into the location given */ + *location = rel[i].r_addend + sym->st_value; + break; + case R_68K_PC32: + /* Add the value, subtract its postition */ + *location = rel[i].r_addend + sym->st_value - (uint32_t)location; + break; + default: + printk(KERN_ERR "module %s: Unknown relocation: %u\n", + me->name, ELF32_R_TYPE(rel[i].r_info)); + return -ENOEXEC; + } + } + return 0; +} + +int module_finalize(const Elf_Ehdr *hdr, + const Elf_Shdr *sechdrs, + struct module *me) +{ + return 0; +} + +void module_arch_cleanup(struct module *mod) +{ +} diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c index c2a1fc2..6cf4bd6 100644 --- a/arch/m68k/kernel/process.c +++ b/arch/m68k/kernel/process.c @@ -1,354 +1,5 @@ -/* - * linux/arch/m68k/kernel/process.c - * - * Copyright (C) 1995 Hamish Macdonald - * - * 68060 fixes by Jesper Skov - */ - -/* - * This file handles the architecture-dependent parts of process handling.. - */ - -#include <linux/errno.h> -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/fs.h> -#include <linux/smp.h> -#include <linux/stddef.h> -#include <linux/unistd.h> -#include <linux/ptrace.h> -#include <linux/user.h> -#include <linux/reboot.h> -#include <linux/init_task.h> -#include <linux/mqueue.h> - -#include <asm/uaccess.h> -#include <asm/system.h> -#include <asm/traps.h> -#include <asm/machdep.h> -#include <asm/setup.h> -#include <asm/pgtable.h> - -/* - * Initial task/thread structure. Make this a per-architecture thing, - * because different architectures tend to have different - * alignment requirements and potentially different initial - * setup. - */ -static struct signal_struct init_signals = INIT_SIGNALS(init_signals); -static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); -union thread_union init_thread_union __init_task_data - __attribute__((aligned(THREAD_SIZE))) = - { INIT_THREAD_INFO(init_task) }; - -/* initial task structure */ -struct task_struct init_task = INIT_TASK(init_task); - -EXPORT_SYMBOL(init_task); - -asmlinkage void ret_from_fork(void); - - -/* - * Return saved PC from a blocked thread - */ -unsigned long thread_saved_pc(struct task_struct *tsk) -{ - struct switch_stack *sw = (struct switch_stack *)tsk->thread.ksp; - /* Check whether the thread is blocked in resume() */ - if (in_sched_functions(sw->retpc)) - return ((unsigned long *)sw->a6)[1]; - else - return sw->retpc; -} - -/* - * The idle loop on an m68k.. - */ -static void default_idle(void) -{ - if (!need_resched()) -#if defined(MACH_ATARI_ONLY) - /* block out HSYNC on the atari (falcon) */ - __asm__("stop #0x2200" : : : "cc"); +#ifdef CONFIG_MMU +#include "process_mm.c" #else - __asm__("stop #0x2000" : : : "cc"); +#include "process_no.c" #endif -} - -void (*idle)(void) = default_idle; - -/* - * The idle thread. There's no useful work to be - * done, so just try to conserve power and have a - * low exit latency (ie sit in a loop waiting for - * somebody to say that they'd like to reschedule) - */ -void cpu_idle(void) -{ - /* endless idle loop with no priority at all */ - while (1) { - while (!need_resched()) - idle(); - preempt_enable_no_resched(); - schedule(); - preempt_disable(); - } -} - -void machine_restart(char * __unused) -{ - if (mach_reset) - mach_reset(); - for (;;); -} - -void machine_halt(void) -{ - if (mach_halt) - mach_halt(); - for (;;); -} - -void machine_power_off(void) -{ - if (mach_power_off) - mach_power_off(); - for (;;); -} - -void (*pm_power_off)(void) = machine_power_off; -EXPORT_SYMBOL(pm_power_off); - -void show_regs(struct pt_regs * regs) -{ - printk("\n"); - printk("Format %02x Vector: %04x PC: %08lx Status: %04x %s\n", - regs->format, regs->vector, regs->pc, regs->sr, print_tainted()); - printk("ORIG_D0: %08lx D0: %08lx A2: %08lx A1: %08lx\n", - regs->orig_d0, regs->d0, regs->a2, regs->a1); - printk("A0: %08lx D5: %08lx D4: %08lx\n", - regs->a0, regs->d5, regs->d4); - printk("D3: %08lx D2: %08lx D1: %08lx\n", - regs->d3, regs->d2, regs->d1); - if (!(regs->sr & PS_S)) - printk("USP: %08lx\n", rdusp()); -} - -/* - * Create a kernel thread - */ -int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) -{ - int pid; - mm_segment_t fs; - - fs = get_fs(); - set_fs (KERNEL_DS); - - { - register long retval __asm__ ("d0"); - register long clone_arg __asm__ ("d1") = flags | CLONE_VM | CLONE_UNTRACED; - - retval = __NR_clone; - __asm__ __volatile__ - ("clrl %%d2\n\t" - "trap #0\n\t" /* Linux/m68k system call */ - "tstl %0\n\t" /* child or parent */ - "jne 1f\n\t" /* parent - jump */ - "lea %%sp@(%c7),%6\n\t" /* reload current */ - "movel %6@,%6\n\t" - "movel %3,%%sp@-\n\t" /* push argument */ - "jsr %4@\n\t" /* call fn */ - "movel %0,%%d1\n\t" /* pass exit value */ - "movel %2,%%d0\n\t" /* exit */ - "trap #0\n" - "1:" - : "+d" (retval) - : "i" (__NR_clone), "i" (__NR_exit), - "r" (arg), "a" (fn), "d" (clone_arg), "r" (current), - "i" (-THREAD_SIZE) - : "d2"); - - pid = retval; - } - - set_fs (fs); - return pid; -} -EXPORT_SYMBOL(kernel_thread); - -void flush_thread(void) -{ - unsigned long zero = 0; - set_fs(USER_DS); - current->thread.fs = __USER_DS; - if (!FPU_IS_EMU) - asm volatile (".chip 68k/68881\n\t" - "frestore %0@\n\t" - ".chip 68k" : : "a" (&zero)); -} - -/* - * "m68k_fork()".. By the time we get here, the - * non-volatile registers have also been saved on the - * stack. We do some ugly pointer stuff here.. (see - * also copy_thread) - */ - -asmlinkage int m68k_fork(struct pt_regs *regs) -{ - return do_fork(SIGCHLD, rdusp(), regs, 0, NULL, NULL); -} - -asmlinkage int m68k_vfork(struct pt_regs *regs) -{ - return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, - NULL, NULL); -} - -asmlinkage int m68k_clone(struct pt_regs *regs) -{ - unsigned long clone_flags; - unsigned long newsp; - int __user *parent_tidptr, *child_tidptr; - - /* syscall2 puts clone_flags in d1 and usp in d2 */ - clone_flags = regs->d1; - newsp = regs->d2; - parent_tidptr = (int __user *)regs->d3; - child_tidptr = (int __user *)regs->d4; - if (!newsp) - newsp = rdusp(); - return do_fork(clone_flags, newsp, regs, 0, - parent_tidptr, child_tidptr); -} - -int copy_thread(unsigned long clone_flags, unsigned long usp, - unsigned long unused, - struct task_struct * p, struct pt_regs * regs) -{ - struct pt_regs * childregs; - struct switch_stack * childstack, *stack; - unsigned long *retp; - - childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1; - - *childregs = *regs; - childregs->d0 = 0; - - retp = ((unsigned long *) regs); - stack = ((struct switch_stack *) retp) - 1; - - childstack = ((struct switch_stack *) childregs) - 1; - *childstack = *stack; - childstack->retpc = (unsigned long)ret_from_fork; - - p->thread.usp = usp; - p->thread.ksp = (unsigned long)childstack; - - if (clone_flags & CLONE_SETTLS) - task_thread_info(p)->tp_value = regs->d5; - - /* - * Must save the current SFC/DFC value, NOT the value when - * the parent was last descheduled - RGH 10-08-96 - */ - p->thread.fs = get_fs().seg; - - if (!FPU_IS_EMU) { - /* Copy the current fpu state */ - asm volatile ("fsave %0" : : "m" (p->thread.fpstate[0]) : "memory"); - - if (!CPU_IS_060 ? p->thread.fpstate[0] : p->thread.fpstate[2]) - asm volatile ("fmovemx %/fp0-%/fp7,%0\n\t" - "fmoveml %/fpiar/%/fpcr/%/fpsr,%1" - : : "m" (p->thread.fp[0]), "m" (p->thread.fpcntl[0]) - : "memory"); - /* Restore the state in case the fpu was busy */ - asm volatile ("frestore %0" : : "m" (p->thread.fpstate[0])); - } - - return 0; -} - -/* Fill in the fpu structure for a core dump. */ - -int dump_fpu (struct pt_regs *regs, struct user_m68kfp_struct *fpu) -{ - char fpustate[216]; - - if (FPU_IS_EMU) { - int i; - - memcpy(fpu->fpcntl, current->thread.fpcntl, 12); - memcpy(fpu->fpregs, current->thread.fp, 96); - /* Convert internal fpu reg representation - * into long double format - */ - for (i = 0; i < 24; i += 3) - fpu->fpregs[i] = ((fpu->fpregs[i] & 0xffff0000) << 15) | - ((fpu->fpregs[i] & 0x0000ffff) << 16); - return 1; - } - - /* First dump the fpu context to avoid protocol violation. */ - asm volatile ("fsave %0" :: "m" (fpustate[0]) : "memory"); - if (!CPU_IS_060 ? !fpustate[0] : !fpustate[2]) - return 0; - - asm volatile ("fmovem %/fpiar/%/fpcr/%/fpsr,%0" - :: "m" (fpu->fpcntl[0]) - : "memory"); - asm volatile ("fmovemx %/fp0-%/fp7,%0" - :: "m" (fpu->fpregs[0]) - : "memory"); - return 1; -} -EXPORT_SYMBOL(dump_fpu); - -/* - * sys_execve() executes a new program. - */ -asmlinkage int sys_execve(const char __user *name, - const char __user *const __user *argv, - const char __user *const __user *envp) -{ - int error; - char * filename; - struct pt_regs *regs = (struct pt_regs *) &name; - - filename = getname(name); - error = PTR_ERR(filename); - if (IS_ERR(filename)) - return error; - error = do_execve(filename, argv, envp, regs); - putname(filename); - return error; -} - -unsigned long get_wchan(struct task_struct *p) -{ - unsigned long fp, pc; - unsigned long stack_page; - int count = 0; - if (!p || p == current || p->state == TASK_RUNNING) - return 0; - - stack_page = (unsigned long)task_stack_page(p); - fp = ((struct switch_stack *)p->thread.ksp)->a6; - do { - if (fp < stack_page+sizeof(struct thread_info) || - fp >= 8184+stack_page) - return 0; - pc = ((unsigned long *)fp)[1]; - if (!in_sched_functions(pc)) - return pc; - fp = *(unsigned long *) fp; - } while (count++ < 16); - return 0; -} diff --git a/arch/m68k/kernel/process_mm.c b/arch/m68k/kernel/process_mm.c new file mode 100644 index 0000000..c2a1fc2 --- /dev/null +++ b/arch/m68k/kernel/process_mm.c @@ -0,0 +1,354 @@ +/* + * linux/arch/m68k/kernel/process.c + * + * Copyright (C) 1995 Hamish Macdonald + * + * 68060 fixes by Jesper Skov + */ + +/* + * This file handles the architecture-dependent parts of process handling.. + */ + +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/slab.h> +#include <linux/fs.h> +#include <linux/smp.h> +#include <linux/stddef.h> +#include <linux/unistd.h> +#include <linux/ptrace.h> +#include <linux/user.h> +#include <linux/reboot.h> +#include <linux/init_task.h> +#include <linux/mqueue.h> + +#include <asm/uaccess.h> +#include <asm/system.h> +#include <asm/traps.h> +#include <asm/machdep.h> +#include <asm/setup.h> +#include <asm/pgtable.h> + +/* + * Initial task/thread structure. Make this a per-architecture thing, + * because different architectures tend to have different + * alignment requirements and potentially different initial + * setup. + */ +static struct signal_struct init_signals = INIT_SIGNALS(init_signals); +static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); +union thread_union init_thread_union __init_task_data + __attribute__((aligned(THREAD_SIZE))) = + { INIT_THREAD_INFO(init_task) }; + +/* initial task structure */ +struct task_struct init_task = INIT_TASK(init_task); + +EXPORT_SYMBOL(init_task); + +asmlinkage void ret_from_fork(void); + + +/* + * Return saved PC from a blocked thread + */ +unsigned long thread_saved_pc(struct task_struct *tsk) +{ + struct switch_stack *sw = (struct switch_stack *)tsk->thread.ksp; + /* Check whether the thread is blocked in resume() */ + if (in_sched_functions(sw->retpc)) + return ((unsigned long *)sw->a6)[1]; + else + return sw->retpc; +} + +/* + * The idle loop on an m68k.. + */ +static void default_idle(void) +{ + if (!need_resched()) +#if defined(MACH_ATARI_ONLY) + /* block out HSYNC on the atari (falcon) */ + __asm__("stop #0x2200" : : : "cc"); +#else + __asm__("stop #0x2000" : : : "cc"); +#endif +} + +void (*idle)(void) = default_idle; + +/* + * The idle thread. There's no useful work to be + * done, so just try to conserve power and have a + * low exit latency (ie sit in a loop waiting for + * somebody to say that they'd like to reschedule) + */ +void cpu_idle(void) +{ + /* endless idle loop with no priority at all */ + while (1) { + while (!need_resched()) + idle(); + preempt_enable_no_resched(); + schedule(); + preempt_disable(); + } +} + +void machine_restart(char * __unused) +{ + if (mach_reset) + mach_reset(); + for (;;); +} + +void machine_halt(void) +{ + if (mach_halt) + mach_halt(); + for (;;); +} + +void machine_power_off(void) +{ + if (mach_power_off) + mach_power_off(); + for (;;); +} + +void (*pm_power_off)(void) = machine_power_off; +EXPORT_SYMBOL(pm_power_off); + +void show_regs(struct pt_regs * regs) +{ + printk("\n"); + printk("Format %02x Vector: %04x PC: %08lx Status: %04x %s\n", + regs->format, regs->vector, regs->pc, regs->sr, print_tainted()); + printk("ORIG_D0: %08lx D0: %08lx A2: %08lx A1: %08lx\n", + regs->orig_d0, regs->d0, regs->a2, regs->a1); + printk("A0: %08lx D5: %08lx D4: %08lx\n", + regs->a0, regs->d5, regs->d4); + printk("D3: %08lx D2: %08lx D1: %08lx\n", + regs->d3, regs->d2, regs->d1); + if (!(regs->sr & PS_S)) + printk("USP: %08lx\n", rdusp()); +} + +/* + * Create a kernel thread + */ +int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) +{ + int pid; + mm_segment_t fs; + + fs = get_fs(); + set_fs (KERNEL_DS); + + { + register long retval __asm__ ("d0"); + register long clone_arg __asm__ ("d1") = flags | CLONE_VM | CLONE_UNTRACED; + + retval = __NR_clone; + __asm__ __volatile__ + ("clrl %%d2\n\t" + "trap #0\n\t" /* Linux/m68k system call */ + "tstl %0\n\t" /* child or parent */ + "jne 1f\n\t" /* parent - jump */ + "lea %%sp@(%c7),%6\n\t" /* reload current */ + "movel %6@,%6\n\t" + "movel %3,%%sp@-\n\t" /* push argument */ + "jsr %4@\n\t" /* call fn */ + "movel %0,%%d1\n\t" /* pass exit value */ + "movel %2,%%d0\n\t" /* exit */ + "trap #0\n" + "1:" + : "+d" (retval) + : "i" (__NR_clone), "i" (__NR_exit), + "r" (arg), "a" (fn), "d" (clone_arg), "r" (current), + "i" (-THREAD_SIZE) + : "d2"); + + pid = retval; + } + + set_fs (fs); + return pid; +} +EXPORT_SYMBOL(kernel_thread); + +void flush_thread(void) +{ + unsigned long zero = 0; + set_fs(USER_DS); + current->thread.fs = __USER_DS; + if (!FPU_IS_EMU) + asm volatile (".chip 68k/68881\n\t" + "frestore %0@\n\t" + ".chip 68k" : : "a" (&zero)); +} + +/* + * "m68k_fork()".. By the time we get here, the + * non-volatile registers have also been saved on the + * stack. We do some ugly pointer stuff here.. (see + * also copy_thread) + */ + +asmlinkage int m68k_fork(struct pt_regs *regs) +{ + return do_fork(SIGCHLD, rdusp(), regs, 0, NULL, NULL); +} + +asmlinkage int m68k_vfork(struct pt_regs *regs) +{ + return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, + NULL, NULL); +} + +asmlinkage int m68k_clone(struct pt_regs *regs) +{ + unsigned long clone_flags; + unsigned long newsp; + int __user *parent_tidptr, *child_tidptr; + + /* syscall2 puts clone_flags in d1 and usp in d2 */ + clone_flags = regs->d1; + newsp = regs->d2; + parent_tidptr = (int __user *)regs->d3; + child_tidptr = (int __user *)regs->d4; + if (!newsp) + newsp = rdusp(); + return do_fork(clone_flags, newsp, regs, 0, + parent_tidptr, child_tidptr); +} + +int copy_thread(unsigned long clone_flags, unsigned long usp, + unsigned long unused, + struct task_struct * p, struct pt_regs * regs) +{ + struct pt_regs * childregs; + struct switch_stack * childstack, *stack; + unsigned long *retp; + + childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1; + + *childregs = *regs; + childregs->d0 = 0; + + retp = ((unsigned long *) regs); + stack = ((struct switch_stack *) retp) - 1; + + childstack = ((struct switch_stack *) childregs) - 1; + *childstack = *stack; + childstack->retpc = (unsigned long)ret_from_fork; + + p->thread.usp = usp; + p->thread.ksp = (unsigned long)childstack; + + if (clone_flags & CLONE_SETTLS) + task_thread_info(p)->tp_value = regs->d5; + + /* + * Must save the current SFC/DFC value, NOT the value when + * the parent was last descheduled - RGH 10-08-96 + */ + p->thread.fs = get_fs().seg; + + if (!FPU_IS_EMU) { + /* Copy the current fpu state */ + asm volatile ("fsave %0" : : "m" (p->thread.fpstate[0]) : "memory"); + + if (!CPU_IS_060 ? p->thread.fpstate[0] : p->thread.fpstate[2]) + asm volatile ("fmovemx %/fp0-%/fp7,%0\n\t" + "fmoveml %/fpiar/%/fpcr/%/fpsr,%1" + : : "m" (p->thread.fp[0]), "m" (p->thread.fpcntl[0]) + : "memory"); + /* Restore the state in case the fpu was busy */ + asm volatile ("frestore %0" : : "m" (p->thread.fpstate[0])); + } + + return 0; +} + +/* Fill in the fpu structure for a core dump. */ + +int dump_fpu (struct pt_regs *regs, struct user_m68kfp_struct *fpu) +{ + char fpustate[216]; + + if (FPU_IS_EMU) { + int i; + + memcpy(fpu->fpcntl, current->thread.fpcntl, 12); + memcpy(fpu->fpregs, current->thread.fp, 96); + /* Convert internal fpu reg representation + * into long double format + */ + for (i = 0; i < 24; i += 3) + fpu->fpregs[i] = ((fpu->fpregs[i] & 0xffff0000) << 15) | + ((fpu->fpregs[i] & 0x0000ffff) << 16); + return 1; + } + + /* First dump the fpu context to avoid protocol violation. */ + asm volatile ("fsave %0" :: "m" (fpustate[0]) : "memory"); + if (!CPU_IS_060 ? !fpustate[0] : !fpustate[2]) + return 0; + + asm volatile ("fmovem %/fpiar/%/fpcr/%/fpsr,%0" + :: "m" (fpu->fpcntl[0]) + : "memory"); + asm volatile ("fmovemx %/fp0-%/fp7,%0" + :: "m" (fpu->fpregs[0]) + : "memory"); + return 1; +} +EXPORT_SYMBOL(dump_fpu); + +/* + * sys_execve() executes a new program. + */ +asmlinkage int sys_execve(const char __user *name, + const char __user *const __user *argv, + const char __user *const __user *envp) +{ + int error; + char * filename; + struct pt_regs *regs = (struct pt_regs *) &name; + + filename = getname(name); + error = PTR_ERR(filename); + if (IS_ERR(filename)) + return error; + error = do_execve(filename, argv, envp, regs); + putname(filename); + return error; +} + +unsigned long get_wchan(struct task_struct *p) +{ + unsigned long fp, pc; + unsigned long stack_page; + int count = 0; + if (!p || p == current || p->state == TASK_RUNNING) + return 0; + + stack_page = (unsigned long)task_stack_page(p); + fp = ((struct switch_stack *)p->thread.ksp)->a6; + do { + if (fp < stack_page+sizeof(struct thread_info) || + fp >= 8184+stack_page) + return 0; + pc = ((unsigned long *)fp)[1]; + if (!in_sched_functions(pc)) + return pc; + fp = *(unsigned long *) fp; + } while (count++ < 16); + return 0; +} diff --git a/arch/m68k/kernel/process_no.c b/arch/m68k/kernel/process_no.c new file mode 100644 index 0000000..e2a63af --- /dev/null +++ b/arch/m68k/kernel/process_no.c @@ -0,0 +1,404 @@ +/* + * linux/arch/m68knommu/kernel/process.c + * + * Copyright (C) 1995 Hamish Macdonald + * + * 68060 fixes by Jesper Skov + * + * uClinux changes + * Copyright (C) 2000-2002, David McCullough <davidm@snapgear.com> + */ + +/* + * This file handles the architecture-dependent parts of process handling.. + */ + +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/stddef.h> +#include <linux/unistd.h> +#include <linux/ptrace.h> +#include <linux/user.h> +#include <linux/interrupt.h> +#include <linux/reboot.h> +#include <linux/fs.h> +#include <linux/slab.h> + +#include <asm/uaccess.h> +#include <asm/system.h> +#include <asm/traps.h> +#include <asm/machdep.h> +#include <asm/setup.h> +#include <asm/pgtable.h> + +asmlinkage void ret_from_fork(void); + +/* + * The following aren't currently used. + */ +void (*pm_idle)(void); +EXPORT_SYMBOL(pm_idle); + +void (*pm_power_off)(void); +EXPORT_SYMBOL(pm_power_off); + +/* + * The idle loop on an m68knommu.. + */ +static void default_idle(void) +{ + local_irq_disable(); + while (!need_resched()) { + /* This stop will re-enable interrupts */ + __asm__("stop #0x2000" : : : "cc"); + local_irq_disable(); + } + local_irq_enable(); +} + +void (*idle)(void) = default_idle; + +/* + * The idle thread. There's no useful work to be + * done, so just try to conserve power and have a + * low exit latency (ie sit in a loop waiting for + * somebody to say that they'd like to reschedule) + */ +void cpu_idle(void) +{ + /* endless idle loop with no priority at all */ + while (1) { + idle(); + preempt_enable_no_resched(); + schedule(); + preempt_disable(); + } +} + +void machine_restart(char * __unused) +{ + if (mach_reset) + mach_reset(); + for (;;); +} + +void machine_halt(void) +{ + if (mach_halt) + mach_halt(); + for (;;); +} + +void machine_power_off(void) +{ + if (mach_power_off) + mach_power_off(); + for (;;); +} + +void show_regs(struct pt_regs * regs) +{ + printk(KERN_NOTICE "\n"); + printk(KERN_NOTICE "Format %02x Vector: %04x PC: %08lx Status: %04x %s\n", + regs->format, regs->vector, regs->pc, regs->sr, print_tainted()); + printk(KERN_NOTICE "ORIG_D0: %08lx D0: %08lx A2: %08lx A1: %08lx\n", + regs->orig_d0, regs->d0, regs->a2, regs->a1); + printk(KERN_NOTICE "A0: %08lx D5: %08lx D4: %08lx\n", + regs->a0, regs->d5, regs->d4); + printk(KERN_NOTICE "D3: %08lx D2: %08lx D1: %08lx\n", + regs->d3, regs->d2, regs->d1); + if (!(regs->sr & PS_S)) + printk(KERN_NOTICE "USP: %08lx\n", rdusp()); +} + +/* + * Create a kernel thread + */ +int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) +{ + int retval; + long clone_arg = flags | CLONE_VM; + mm_segment_t fs; + + fs = get_fs(); + set_fs(KERNEL_DS); + + __asm__ __volatile__ ( + "movel %%sp, %%d2\n\t" + "movel %5, %%d1\n\t" + "movel %1, %%d0\n\t" + "trap #0\n\t" + "cmpl %%sp, %%d2\n\t" + "jeq 1f\n\t" + "movel %3, %%sp@-\n\t" + "jsr %4@\n\t" + "movel %2, %%d0\n\t" + "trap #0\n" + "1:\n\t" + "movel %%d0, %0\n" + : "=d" (retval) + : "i" (__NR_clone), + "i" (__NR_exit), + "a" (arg), + "a" (fn), + "a" (clone_arg) + : "cc", "%d0", "%d1", "%d2"); + + set_fs(fs); + return retval; +} + +void flush_thread(void) +{ +#ifdef CONFIG_FPU + unsigned long zero = 0; +#endif + set_fs(USER_DS); + current->thread.fs = __USER_DS; +#ifdef CONFIG_FPU + if (!FPU_IS_EMU) + asm volatile (".chip 68k/68881\n\t" + "frestore %0@\n\t" + ".chip 68k" : : "a" (&zero)); +#endif +} + +/* + * "m68k_fork()".. By the time we get here, the + * non-volatile registers have also been saved on the + * stack. We do some ugly pointer stuff here.. (see + * also copy_thread) + */ + +asmlinkage int m68k_fork(struct pt_regs *regs) +{ + /* fork almost works, enough to trick you into looking elsewhere :-( */ + return(-EINVAL); +} + +asmlinkage int m68k_vfork(struct pt_regs *regs) +{ + return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, NULL, NULL); +} + +asmlinkage int m68k_clone(struct pt_regs *regs) +{ + unsigned long clone_flags; + unsigned long newsp; + + /* syscall2 puts clone_flags in d1 and usp in d2 */ + clone_flags = regs->d1; + newsp = regs->d2; + if (!newsp) + newsp = rdusp(); + return do_fork(clone_flags, newsp, regs, 0, NULL, NULL); +} + +int copy_thread(unsigned long clone_flags, + unsigned long usp, unsigned long topstk, + struct task_struct * p, struct pt_regs * regs) +{ + struct pt_regs * childregs; + struct switch_stack * childstack, *stack; + unsigned long *retp; + + childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1; + + *childregs = *regs; + childregs->d0 = 0; + + retp = ((unsigned long *) regs); + stack = ((struct switch_stack *) retp) - 1; + + childstack = ((struct switch_stack *) childregs) - 1; + *childstack = *stack; + childstack->retpc = (unsigned long)ret_from_fork; + + p->thread.usp = usp; + p->thread.ksp = (unsigned long)childstack; + + if (clone_flags & CLONE_SETTLS) + task_thread_info(p)->tp_value = regs->d5; + + /* + * Must save the current SFC/DFC value, NOT the value when + * the parent was last descheduled - RGH 10-08-96 + */ + p->thread.fs = get_fs().seg; + +#ifdef CONFIG_FPU + if (!FPU_IS_EMU) { + /* Copy the current fpu state */ + asm volatile ("fsave %0" : : "m" (p->thread.fpstate[0]) : "memory"); + + if (p->thread.fpstate[0]) + asm volatile ("fmovemx %/fp0-%/fp7,%0\n\t" + "fmoveml %/fpiar/%/fpcr/%/fpsr,%1" + : : "m" (p->thread.fp[0]), "m" (p->thread.fpcntl[0]) + : "memory"); + /* Restore the state in case the fpu was busy */ + asm volatile ("frestore %0" : : "m" (p->thread.fpstate[0])); + } +#endif + + return 0; +} + +/* Fill in the fpu structure for a core dump. */ + +int dump_fpu(struct pt_regs *regs, struct user_m68kfp_struct *fpu) +{ +#ifdef CONFIG_FPU + char fpustate[216]; + + if (FPU_IS_EMU) { + int i; + + memcpy(fpu->fpcntl, current->thread.fpcntl, 12); + memcpy(fpu->fpregs, current->thread.fp, 96); + /* Convert internal fpu reg representation + * into long double format + */ + for (i = 0; i < 24; i += 3) + fpu->fpregs[i] = ((fpu->fpregs[i] & 0xffff0000) << 15) | + ((fpu->fpregs[i] & 0x0000ffff) << 16); + return 1; + } + + /* First dump the fpu context to avoid protocol violation. */ + asm volatile ("fsave %0" :: "m" (fpustate[0]) : "memory"); + if (!fpustate[0]) + return 0; + + asm volatile ("fmovem %/fpiar/%/fpcr/%/fpsr,%0" + :: "m" (fpu->fpcntl[0]) + : "memory"); + asm volatile ("fmovemx %/fp0-%/fp7,%0" + :: "m" (fpu->fpregs[0]) + : "memory"); +#endif + return 1; +} + +/* + * Generic dumping code. Used for panic and debug. + */ +void dump(struct pt_regs *fp) +{ + unsigned long *sp; + unsigned char *tp; + int i; + + printk(KERN_EMERG "\nCURRENT PROCESS:\n\n"); + printk(KERN_EMERG "COMM=%s PID=%d\n", current->comm, current->pid); + + if (current->mm) { + printk(KERN_EMERG "TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n", + (int) current->mm->start_code, + (int) current->mm->end_code, + (int) current->mm->start_data, + (int) current->mm->end_data, + (int) current->mm->end_data, + (int) current->mm->brk); + printk(KERN_EMERG "USER-STACK=%08x KERNEL-STACK=%08x\n\n", + (int) current->mm->start_stack, + (int)(((unsigned long) current) + THREAD_SIZE)); + } + + printk(KERN_EMERG "PC: %08lx\n", fp->pc); + printk(KERN_EMERG "SR: %08lx SP: %08lx\n", (long) fp->sr, (long) fp); + printk(KERN_EMERG "d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n", + fp->d0, fp->d1, fp->d2, fp->d3); + printk(KERN_EMERG "d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n", + fp->d4, fp->d5, fp->a0, fp->a1); + printk(KERN_EMERG "\nUSP: %08x TRAPFRAME: %p\n", + (unsigned int) rdusp(), fp); + + printk(KERN_EMERG "\nCODE:"); + tp = ((unsigned char *) fp->pc) - 0x20; + for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) { + if ((i % 0x10) == 0) + printk(KERN_EMERG "%p: ", tp + i); + printk("%08x ", (int) *sp++); + } + printk(KERN_EMERG "\n"); + + printk(KERN_EMERG "KERNEL STACK:"); + tp = ((unsigned char *) fp) - 0x40; + for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) { + if ((i % 0x10) == 0) + printk(KERN_EMERG "%p: ", tp + i); + printk("%08x ", (int) *sp++); + } + printk(KERN_EMERG "\n"); + + printk(KERN_EMERG "USER STACK:"); + tp = (unsigned char *) (rdusp() - 0x10); + for (sp = (unsigned long *) tp, i = 0; (i < 0x80); i += 4) { + if ((i % 0x10) == 0) + printk(KERN_EMERG "%p: ", tp + i); + printk("%08x ", (int) *sp++); + } + printk(KERN_EMERG "\n"); +} + +/* + * sys_execve() executes a new program. + */ +asmlinkage int sys_execve(const char *name, + const char *const *argv, + const char *const *envp) +{ + int error; + char * filename; + struct pt_regs *regs = (struct pt_regs *) &name; + + filename = getname(name); + error = PTR_ERR(filename); + if (IS_ERR(filename)) + return error; + error = do_execve(filename, argv, envp, regs); + putname(filename); + return error; +} + +unsigned long get_wchan(struct task_struct *p) +{ + unsigned long fp, pc; + unsigned long stack_page; + int count = 0; + if (!p || p == current || p->state == TASK_RUNNING) + return 0; + + stack_page = (unsigned long)p; + fp = ((struct switch_stack *)p->thread.ksp)->a6; + do { + if (fp < stack_page+sizeof(struct thread_info) || + fp >= THREAD_SIZE-8+stack_page) + return 0; + pc = ((unsigned long *)fp)[1]; + if (!in_sched_functions(pc)) + return pc; + fp = *(unsigned long *) fp; + } while (count++ < 16); + return 0; +} + +/* + * Return saved PC of a blocked thread. + */ +unsigned long thread_saved_pc(struct task_struct *tsk) +{ + struct switch_stack *sw = (struct switch_stack *)tsk->thread.ksp; + + /* Check whether the thread is blocked in resume() */ + if (in_sched_functions(sw->retpc)) + return ((unsigned long *)sw->a6)[1]; + else + return sw->retpc; +} + diff --git a/arch/m68k/kernel/ptrace.c b/arch/m68k/kernel/ptrace.c index 0b25268..07a4175 100644 --- a/arch/m68k/kernel/ptrace.c +++ b/arch/m68k/kernel/ptrace.c @@ -1,277 +1,5 @@ -/* - * linux/arch/m68k/kernel/ptrace.c - * - * Copyright (C) 1994 by Hamish Macdonald - * Taken from linux/kernel/ptrace.c and modified for M680x0. - * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds - * - * This file is subject to the terms and conditions of the GNU General - * Public License. See the file COPYING in the main directory of - * this archive for more details. - */ - -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/mm.h> -#include <linux/smp.h> -#include <linux/errno.h> -#include <linux/ptrace.h> -#include <linux/user.h> -#include <linux/signal.h> - -#include <asm/uaccess.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/system.h> -#include <asm/processor.h> - -/* - * does not yet catch signals sent when the child dies. - * in exit.c or in signal.c. - */ - -/* determines which bits in the SR the user has access to. */ -/* 1 = access 0 = no access */ -#define SR_MASK 0x001f - -/* sets the trace bits. */ -#define TRACE_BITS 0xC000 -#define T1_BIT 0x8000 -#define T0_BIT 0x4000 - -/* Find the stack offset for a register, relative to thread.esp0. */ -#define PT_REG(reg) ((long)&((struct pt_regs *)0)->reg) -#define SW_REG(reg) ((long)&((struct switch_stack *)0)->reg \ - - sizeof(struct switch_stack)) -/* Mapping from PT_xxx to the stack offset at which the register is - saved. Notice that usp has no stack-slot and needs to be treated - specially (see get_reg/put_reg below). */ -static const int regoff[] = { - [0] = PT_REG(d1), - [1] = PT_REG(d2), - [2] = PT_REG(d3), - [3] = PT_REG(d4), - [4] = PT_REG(d5), - [5] = SW_REG(d6), - [6] = SW_REG(d7), - [7] = PT_REG(a0), - [8] = PT_REG(a1), - [9] = PT_REG(a2), - [10] = SW_REG(a3), - [11] = SW_REG(a4), - [12] = SW_REG(a5), - [13] = SW_REG(a6), - [14] = PT_REG(d0), - [15] = -1, - [16] = PT_REG(orig_d0), - [17] = PT_REG(sr), - [18] = PT_REG(pc), -}; - -/* - * Get contents of register REGNO in task TASK. - */ -static inline long get_reg(struct task_struct *task, int regno) -{ - unsigned long *addr; - - if (regno == PT_USP) - addr = &task->thread.usp; - else if (regno < ARRAY_SIZE(regoff)) - addr = (unsigned long *)(task->thread.esp0 + regoff[regno]); - else - return 0; - /* Need to take stkadj into account. */ - if (regno == PT_SR || regno == PT_PC) { - long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj)); - addr = (unsigned long *) ((unsigned long)addr + stkadj); - /* The sr is actually a 16 bit register. */ - if (regno == PT_SR) - return *(unsigned short *)addr; - } - return *addr; -} - -/* - * Write contents of register REGNO in task TASK. - */ -static inline int put_reg(struct task_struct *task, int regno, - unsigned long data) -{ - unsigned long *addr; - - if (regno == PT_USP) - addr = &task->thread.usp; - else if (regno < ARRAY_SIZE(regoff)) - addr = (unsigned long *)(task->thread.esp0 + regoff[regno]); - else - return -1; - /* Need to take stkadj into account. */ - if (regno == PT_SR || regno == PT_PC) { - long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj)); - addr = (unsigned long *) ((unsigned long)addr + stkadj); - /* The sr is actually a 16 bit register. */ - if (regno == PT_SR) { - *(unsigned short *)addr = data; - return 0; - } - } - *addr = data; - return 0; -} - -/* - * Make sure the single step bit is not set. - */ -static inline void singlestep_disable(struct task_struct *child) -{ - unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS; - put_reg(child, PT_SR, tmp); - clear_tsk_thread_flag(child, TIF_DELAYED_TRACE); -} - -/* - * Called by kernel/ptrace.c when detaching.. - */ -void ptrace_disable(struct task_struct *child) -{ - singlestep_disable(child); -} - -void user_enable_single_step(struct task_struct *child) -{ - unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS; - put_reg(child, PT_SR, tmp | T1_BIT); - set_tsk_thread_flag(child, TIF_DELAYED_TRACE); -} - -void user_enable_block_step(struct task_struct *child) -{ - unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS; - put_reg(child, PT_SR, tmp | T0_BIT); -} - -void user_disable_single_step(struct task_struct *child) -{ - singlestep_disable(child); -} - -long arch_ptrace(struct task_struct *child, long request, - unsigned long addr, unsigned long data) -{ - unsigned long tmp; - int i, ret = 0; - int regno = addr >> 2; /* temporary hack. */ - unsigned long __user *datap = (unsigned long __user *) data; - - switch (request) { - /* read the word at location addr in the USER area. */ - case PTRACE_PEEKUSR: - if (addr & 3) - goto out_eio; - - if (regno >= 0 && regno < 19) { - tmp = get_reg(child, regno); - } else if (regno >= 21 && regno < 49) { - tmp = child->thread.fp[regno - 21]; - /* Convert internal fpu reg representation - * into long double format - */ - if (FPU_IS_EMU && (regno < 45) && !(regno % 3)) - tmp = ((tmp & 0xffff0000) << 15) | - ((tmp & 0x0000ffff) << 16); - } else - goto out_eio; - ret = put_user(tmp, datap); - break; - - case PTRACE_POKEUSR: - /* write the word at location addr in the USER area */ - if (addr & 3) - goto out_eio; - - if (regno == PT_SR) { - data &= SR_MASK; - data |= get_reg(child, PT_SR) & ~SR_MASK; - } - if (regno >= 0 && regno < 19) { - if (put_reg(child, regno, data)) - goto out_eio; - } else if (regno >= 21 && regno < 48) { - /* Convert long double format - * into internal fpu reg representation - */ - if (FPU_IS_EMU && (regno < 45) && !(regno % 3)) { - data <<= 15; - data = (data & 0xffff0000) | - ((data & 0x0000ffff) >> 1); - } - child->thread.fp[regno - 21] = data; - } else - goto out_eio; - break; - - case PTRACE_GETREGS: /* Get all gp regs from the child. */ - for (i = 0; i < 19; i++) { - tmp = get_reg(child, i); - ret = put_user(tmp, datap); - if (ret) - break; - datap++; - } - break; - - case PTRACE_SETREGS: /* Set all gp regs in the child. */ - for (i = 0; i < 19; i++) { - ret = get_user(tmp, datap); - if (ret) - break; - if (i == PT_SR) { - tmp &= SR_MASK; - tmp |= get_reg(child, PT_SR) & ~SR_MASK; - } - put_reg(child, i, tmp); - datap++; - } - break; - - case PTRACE_GETFPREGS: /* Get the child FPU state. */ - if (copy_to_user(datap, &child->thread.fp, - sizeof(struct user_m68kfp_struct))) - ret = -EFAULT; - break; - - case PTRACE_SETFPREGS: /* Set the child FPU state. */ - if (copy_from_user(&child->thread.fp, datap, - sizeof(struct user_m68kfp_struct))) - ret = -EFAULT; - break; - - case PTRACE_GET_THREAD_AREA: - ret = put_user(task_thread_info(child)->tp_value, datap); - break; - - default: - ret = ptrace_request(child, request, addr, data); - break; - } - - return ret; -out_eio: - return -EIO; -} - -asmlinkage void syscall_trace(void) -{ - ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) - ? 0x80 : 0)); - /* - * this isn't the same as continuing with a signal, but it will do - * for normal use. strace only continues with a signal if the - * stopping signal is not SIGTRAP. -brl - */ - if (current->exit_code) { - send_sig(current->exit_code, current, 1); - current->exit_code = 0; - } -} +#ifdef CONFIG_MMU +#include "ptrace_mm.c" +#else +#include "ptrace_no.c" +#endif diff --git a/arch/m68k/kernel/ptrace_mm.c b/arch/m68k/kernel/ptrace_mm.c new file mode 100644 index 0000000..0b25268 --- /dev/null +++ b/arch/m68k/kernel/ptrace_mm.c @@ -0,0 +1,277 @@ +/* + * linux/arch/m68k/kernel/ptrace.c + * + * Copyright (C) 1994 by Hamish Macdonald + * Taken from linux/kernel/ptrace.c and modified for M680x0. + * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of + * this archive for more details. + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/errno.h> +#include <linux/ptrace.h> +#include <linux/user.h> +#include <linux/signal.h> + +#include <asm/uaccess.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/system.h> +#include <asm/processor.h> + +/* + * does not yet catch signals sent when the child dies. + * in exit.c or in signal.c. + */ + +/* determines which bits in the SR the user has access to. */ +/* 1 = access 0 = no access */ +#define SR_MASK 0x001f + +/* sets the trace bits. */ +#define TRACE_BITS 0xC000 +#define T1_BIT 0x8000 +#define T0_BIT 0x4000 + +/* Find the stack offset for a register, relative to thread.esp0. */ +#define PT_REG(reg) ((long)&((struct pt_regs *)0)->reg) +#define SW_REG(reg) ((long)&((struct switch_stack *)0)->reg \ + - sizeof(struct switch_stack)) +/* Mapping from PT_xxx to the stack offset at which the register is + saved. Notice that usp has no stack-slot and needs to be treated + specially (see get_reg/put_reg below). */ +static const int regoff[] = { + [0] = PT_REG(d1), + [1] = PT_REG(d2), + [2] = PT_REG(d3), + [3] = PT_REG(d4), + [4] = PT_REG(d5), + [5] = SW_REG(d6), + [6] = SW_REG(d7), + [7] = PT_REG(a0), + [8] = PT_REG(a1), + [9] = PT_REG(a2), + [10] = SW_REG(a3), + [11] = SW_REG(a4), + [12] = SW_REG(a5), + [13] = SW_REG(a6), + [14] = PT_REG(d0), + [15] = -1, + [16] = PT_REG(orig_d0), + [17] = PT_REG(sr), + [18] = PT_REG(pc), +}; + +/* + * Get contents of register REGNO in task TASK. + */ +static inline long get_reg(struct task_struct *task, int regno) +{ + unsigned long *addr; + + if (regno == PT_USP) + addr = &task->thread.usp; + else if (regno < ARRAY_SIZE(regoff)) + addr = (unsigned long *)(task->thread.esp0 + regoff[regno]); + else + return 0; + /* Need to take stkadj into account. */ + if (regno == PT_SR || regno == PT_PC) { + long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj)); + addr = (unsigned long *) ((unsigned long)addr + stkadj); + /* The sr is actually a 16 bit register. */ + if (regno == PT_SR) + return *(unsigned short *)addr; + } + return *addr; +} + +/* + * Write contents of register REGNO in task TASK. + */ +static inline int put_reg(struct task_struct *task, int regno, + unsigned long data) +{ + unsigned long *addr; + + if (regno == PT_USP) + addr = &task->thread.usp; + else if (regno < ARRAY_SIZE(regoff)) + addr = (unsigned long *)(task->thread.esp0 + regoff[regno]); + else + return -1; + /* Need to take stkadj into account. */ + if (regno == PT_SR || regno == PT_PC) { + long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj)); + addr = (unsigned long *) ((unsigned long)addr + stkadj); + /* The sr is actually a 16 bit register. */ + if (regno == PT_SR) { + *(unsigned short *)addr = data; + return 0; + } + } + *addr = data; + return 0; +} + +/* + * Make sure the single step bit is not set. + */ +static inline void singlestep_disable(struct task_struct *child) +{ + unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS; + put_reg(child, PT_SR, tmp); + clear_tsk_thread_flag(child, TIF_DELAYED_TRACE); +} + +/* + * Called by kernel/ptrace.c when detaching.. + */ +void ptrace_disable(struct task_struct *child) +{ + singlestep_disable(child); +} + +void user_enable_single_step(struct task_struct *child) +{ + unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS; + put_reg(child, PT_SR, tmp | T1_BIT); + set_tsk_thread_flag(child, TIF_DELAYED_TRACE); +} + +void user_enable_block_step(struct task_struct *child) +{ + unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS; + put_reg(child, PT_SR, tmp | T0_BIT); +} + +void user_disable_single_step(struct task_struct *child) +{ + singlestep_disable(child); +} + +long arch_ptrace(struct task_struct *child, long request, + unsigned long addr, unsigned long data) +{ + unsigned long tmp; + int i, ret = 0; + int regno = addr >> 2; /* temporary hack. */ + unsigned long __user *datap = (unsigned long __user *) data; + + switch (request) { + /* read the word at location addr in the USER area. */ + case PTRACE_PEEKUSR: + if (addr & 3) + goto out_eio; + + if (regno >= 0 && regno < 19) { + tmp = get_reg(child, regno); + } else if (regno >= 21 && regno < 49) { + tmp = child->thread.fp[regno - 21]; + /* Convert internal fpu reg representation + * into long double format + */ + if (FPU_IS_EMU && (regno < 45) && !(regno % 3)) + tmp = ((tmp & 0xffff0000) << 15) | + ((tmp & 0x0000ffff) << 16); + } else + goto out_eio; + ret = put_user(tmp, datap); + break; + + case PTRACE_POKEUSR: + /* write the word at location addr in the USER area */ + if (addr & 3) + goto out_eio; + + if (regno == PT_SR) { + data &= SR_MASK; + data |= get_reg(child, PT_SR) & ~SR_MASK; + } + if (regno >= 0 && regno < 19) { + if (put_reg(child, regno, data)) + goto out_eio; + } else if (regno >= 21 && regno < 48) { + /* Convert long double format + * into internal fpu reg representation + */ + if (FPU_IS_EMU && (regno < 45) && !(regno % 3)) { + data <<= 15; + data = (data & 0xffff0000) | + ((data & 0x0000ffff) >> 1); + } + child->thread.fp[regno - 21] = data; + } else + goto out_eio; + break; + + case PTRACE_GETREGS: /* Get all gp regs from the child. */ + for (i = 0; i < 19; i++) { + tmp = get_reg(child, i); + ret = put_user(tmp, datap); + if (ret) + break; + datap++; + } + break; + + case PTRACE_SETREGS: /* Set all gp regs in the child. */ + for (i = 0; i < 19; i++) { + ret = get_user(tmp, datap); + if (ret) + break; + if (i == PT_SR) { + tmp &= SR_MASK; + tmp |= get_reg(child, PT_SR) & ~SR_MASK; + } + put_reg(child, i, tmp); + datap++; + } + break; + + case PTRACE_GETFPREGS: /* Get the child FPU state. */ + if (copy_to_user(datap, &child->thread.fp, + sizeof(struct user_m68kfp_struct))) + ret = -EFAULT; + break; + + case PTRACE_SETFPREGS: /* Set the child FPU state. */ + if (copy_from_user(&child->thread.fp, datap, + sizeof(struct user_m68kfp_struct))) + ret = -EFAULT; + break; + + case PTRACE_GET_THREAD_AREA: + ret = put_user(task_thread_info(child)->tp_value, datap); + break; + + default: + ret = ptrace_request(child, request, addr, data); + break; + } + + return ret; +out_eio: + return -EIO; +} + +asmlinkage void syscall_trace(void) +{ + ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) + ? 0x80 : 0)); + /* + * this isn't the same as continuing with a signal, but it will do + * for normal use. strace only continues with a signal if the + * stopping signal is not SIGTRAP. -brl + */ + if (current->exit_code) { + send_sig(current->exit_code, current, 1); + current->exit_code = 0; + } +} diff --git a/arch/m68k/kernel/ptrace_no.c b/arch/m68k/kernel/ptrace_no.c new file mode 100644 index 0000000..6709fb7 --- /dev/null +++ b/arch/m68k/kernel/ptrace_no.c @@ -0,0 +1,255 @@ +/* + * linux/arch/m68knommu/kernel/ptrace.c + * + * Copyright (C) 1994 by Hamish Macdonald + * Taken from linux/kernel/ptrace.c and modified for M680x0. + * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of + * this archive for more details. + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/errno.h> +#include <linux/ptrace.h> +#include <linux/user.h> +#include <linux/signal.h> +#include <linux/tracehook.h> + +#include <asm/uaccess.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/system.h> +#include <asm/processor.h> + +/* + * does not yet catch signals sent when the child dies. + * in exit.c or in signal.c. + */ + +/* determines which bits in the SR the user has access to. */ +/* 1 = access 0 = no access */ +#define SR_MASK 0x001f + +/* sets the trace bits. */ +#define TRACE_BITS 0x8000 + +/* Find the stack offset for a register, relative to thread.esp0. */ +#define PT_REG(reg) ((long)&((struct pt_regs *)0)->reg) +#define SW_REG(reg) ((long)&((struct switch_stack *)0)->reg \ + - sizeof(struct switch_stack)) +/* Mapping from PT_xxx to the stack offset at which the register is + saved. Notice that usp has no stack-slot and needs to be treated + specially (see get_reg/put_reg below). */ +static int regoff[] = { + PT_REG(d1), PT_REG(d2), PT_REG(d3), PT_REG(d4), + PT_REG(d5), SW_REG(d6), SW_REG(d7), PT_REG(a0), + PT_REG(a1), PT_REG(a2), SW_REG(a3), SW_REG(a4), + SW_REG(a5), SW_REG(a6), PT_REG(d0), -1, + PT_REG(orig_d0), PT_REG(sr), PT_REG(pc), +}; + +/* + * Get contents of register REGNO in task TASK. + */ +static inline long get_reg(struct task_struct *task, int regno) +{ + unsigned long *addr; + + if (regno == PT_USP) + addr = &task->thread.usp; + else if (regno < ARRAY_SIZE(regoff)) + addr = (unsigned long *)(task->thread.esp0 + regoff[regno]); + else + return 0; + return *addr; +} + +/* + * Write contents of register REGNO in task TASK. + */ +static inline int put_reg(struct task_struct *task, int regno, + unsigned long data) +{ + unsigned long *addr; + + if (regno == PT_USP) + addr = &task->thread.usp; + else if (regno < ARRAY_SIZE(regoff)) + addr = (unsigned long *) (task->thread.esp0 + regoff[regno]); + else + return -1; + *addr = data; + return 0; +} + +void user_enable_single_step(struct task_struct *task) +{ + unsigned long srflags; + srflags = get_reg(task, PT_SR) | (TRACE_BITS << 16); + put_reg(task, PT_SR, srflags); +} + +void user_disable_single_step(struct task_struct *task) +{ + unsigned long srflags; + srflags = get_reg(task, PT_SR) & ~(TRACE_BITS << 16); + put_reg(task, PT_SR, srflags); +} + +/* + * Called by kernel/ptrace.c when detaching.. + * + * Make sure the single step bit is not set. + */ +void ptrace_disable(struct task_struct *child) +{ + /* make sure the single step bit is not set. */ + user_disable_single_step(child); +} + +long arch_ptrace(struct task_struct *child, long request, + unsigned long addr, unsigned long data) +{ + int ret; + int regno = addr >> 2; + unsigned long __user *datap = (unsigned long __user *) data; + + switch (request) { + /* read the word at location addr in the USER area. */ + case PTRACE_PEEKUSR: { + unsigned long tmp; + + ret = -EIO; + if ((addr & 3) || addr > sizeof(struct user) - 3) + break; + + tmp = 0; /* Default return condition */ + ret = -EIO; + if (regno < 19) { + tmp = get_reg(child, regno); + if (regno == PT_SR) + tmp >>= 16; + } else if (regno >= 21 && regno < 49) { + tmp = child->thread.fp[regno - 21]; + } else if (regno == 49) { + tmp = child->mm->start_code; + } else if (regno == 50) { + tmp = child->mm->start_data; + } else if (regno == 51) { + tmp = child->mm->end_code; + } else + break; + ret = put_user(tmp, datap); + break; + } + + case PTRACE_POKEUSR: /* write the word at location addr in the USER area */ + ret = -EIO; + if ((addr & 3) || addr > sizeof(struct user) - 3) + break; + + if (regno == PT_SR) { + data &= SR_MASK; + data <<= 16; + data |= get_reg(child, PT_SR) & ~(SR_MASK << 16); + } + if (regno < 19) { + if (put_reg(child, regno, data)) + break; + ret = 0; + break; + } + if (regno >= 21 && regno < 48) + { + child->thread.fp[regno - 21] = data; + ret = 0; + } + break; + + case PTRACE_GETREGS: { /* Get all gp regs from the child. */ + int i; + unsigned long tmp; + for (i = 0; i < 19; i++) { + tmp = get_reg(child, i); + if (i == PT_SR) + tmp >>= 16; + if (put_user(tmp, datap)) { + ret = -EFAULT; + break; + } + datap++; + } + ret = 0; + break; + } + + case PTRACE_SETREGS: { /* Set all gp regs in the child. */ + int i; + unsigned long tmp; + for (i = 0; i < 19; i++) { + if (get_user(tmp, datap)) { + ret = -EFAULT; + break; + } + if (i == PT_SR) { + tmp &= SR_MASK; + tmp <<= 16; + tmp |= get_reg(child, PT_SR) & ~(SR_MASK << 16); + } + put_reg(child, i, tmp); + datap++; + } + ret = 0; + break; + } + +#ifdef PTRACE_GETFPREGS + case PTRACE_GETFPREGS: { /* Get the child FPU state. */ + ret = 0; + if (copy_to_user(datap, &child->thread.fp, + sizeof(struct user_m68kfp_struct))) + ret = -EFAULT; + break; + } +#endif + +#ifdef PTRACE_SETFPREGS + case PTRACE_SETFPREGS: { /* Set the child FPU state. */ + ret = 0; + if (copy_from_user(&child->thread.fp, datap, + sizeof(struct user_m68kfp_struct))) + ret = -EFAULT; + break; + } +#endif + + case PTRACE_GET_THREAD_AREA: + ret = put_user(task_thread_info(child)->tp_value, datap); + break; + + default: + ret = ptrace_request(child, request, addr, data); + break; + } + return ret; +} + +asmlinkage int syscall_trace_enter(void) +{ + int ret = 0; + + if (test_thread_flag(TIF_SYSCALL_TRACE)) + ret = tracehook_report_syscall_entry(task_pt_regs(current)); + return ret; +} + +asmlinkage void syscall_trace_leave(void) +{ + if (test_thread_flag(TIF_SYSCALL_TRACE)) + tracehook_report_syscall_exit(task_pt_regs(current), 0); +} diff --git a/arch/m68k/kernel/setup.c b/arch/m68k/kernel/setup.c index 334d836..4bf129f 100644 --- a/arch/m68k/kernel/setup.c +++ b/arch/m68k/kernel/setup.c @@ -1,533 +1,5 @@ -/* - * linux/arch/m68k/kernel/setup.c - * - * Copyright (C) 1995 Hamish Macdonald - */ - -/* - * This file handles the architecture-dependent parts of system setup - */ - -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/sched.h> -#include <linux/delay.h> -#include <linux/interrupt.h> -#include <linux/fs.h> -#include <linux/console.h> -#include <linux/genhd.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/init.h> -#include <linux/bootmem.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> -#include <linux/module.h> -#include <linux/initrd.h> - -#include <asm/bootinfo.h> -#include <asm/sections.h> -#include <asm/setup.h> -#include <asm/fpu.h> -#include <asm/irq.h> -#include <asm/io.h> -#include <asm/machdep.h> -#ifdef CONFIG_AMIGA -#include <asm/amigahw.h> -#endif -#ifdef CONFIG_ATARI -#include <asm/atarihw.h> -#include <asm/atari_stram.h> -#endif -#ifdef CONFIG_SUN3X -#include <asm/dvma.h> -#endif -#include <asm/natfeat.h> - -#if !FPSTATESIZE || !NR_IRQS -#warning No CPU/platform type selected, your kernel will not work! -#warning Are you building an allnoconfig kernel? -#endif - -unsigned long m68k_machtype; -EXPORT_SYMBOL(m68k_machtype); -unsigned long m68k_cputype; -EXPORT_SYMBOL(m68k_cputype); -unsigned long m68k_fputype; -unsigned long m68k_mmutype; -EXPORT_SYMBOL(m68k_mmutype); -#ifdef CONFIG_VME -unsigned long vme_brdtype; -EXPORT_SYMBOL(vme_brdtype); -#endif - -int m68k_is040or060; -EXPORT_SYMBOL(m68k_is040or060); - -extern unsigned long availmem; - -int m68k_num_memory; -EXPORT_SYMBOL(m68k_num_memory); -int m68k_realnum_memory; -EXPORT_SYMBOL(m68k_realnum_memory); -unsigned long m68k_memoffset; -struct mem_info m68k_memory[NUM_MEMINFO]; -EXPORT_SYMBOL(m68k_memory); - -struct mem_info m68k_ramdisk; - -static char m68k_command_line[CL_SIZE]; - -void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL; -/* machine dependent irq functions */ -void (*mach_init_IRQ) (void) __initdata = NULL; -void (*mach_get_model) (char *model); -void (*mach_get_hardware_list) (struct seq_file *m); -/* machine dependent timer functions */ -unsigned long (*mach_gettimeoffset) (void); -int (*mach_hwclk) (int, struct rtc_time*); -EXPORT_SYMBOL(mach_hwclk); -int (*mach_set_clock_mmss) (unsigned long); -unsigned int (*mach_get_ss)(void); -int (*mach_get_rtc_pll)(struct rtc_pll_info *); -int (*mach_set_rtc_pll)(struct rtc_pll_info *); -EXPORT_SYMBOL(mach_get_ss); -EXPORT_SYMBOL(mach_get_rtc_pll); -EXPORT_SYMBOL(mach_set_rtc_pll); -void (*mach_reset)( void ); -void (*mach_halt)( void ); -void (*mach_power_off)( void ); -long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ -#ifdef CONFIG_HEARTBEAT -void (*mach_heartbeat) (int); -EXPORT_SYMBOL(mach_heartbeat); -#endif -#ifdef CONFIG_M68K_L2_CACHE -void (*mach_l2_flush) (int); -#endif -#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) -void (*mach_beep)(unsigned int, unsigned int); -EXPORT_SYMBOL(mach_beep); -#endif -#if defined(CONFIG_ISA) && defined(MULTI_ISA) -int isa_type; -int isa_sex; -EXPORT_SYMBOL(isa_type); -EXPORT_SYMBOL(isa_sex); -#endif - -extern int amiga_parse_bootinfo(const struct bi_record *); -extern int atari_parse_bootinfo(const struct bi_record *); -extern int mac_parse_bootinfo(const struct bi_record *); -extern int q40_parse_bootinfo(const struct bi_record *); -extern int bvme6000_parse_bootinfo(const struct bi_record *); -extern int mvme16x_parse_bootinfo(const struct bi_record *); -extern int mvme147_parse_bootinfo(const struct bi_record *); -extern int hp300_parse_bootinfo(const struct bi_record *); -extern int apollo_parse_bootinfo(const struct bi_record *); - -extern void config_amiga(void); -extern void config_atari(void); -extern void config_mac(void); -extern void config_sun3(void); -extern void config_apollo(void); -extern void config_mvme147(void); -extern void config_mvme16x(void); -extern void config_bvme6000(void); -extern void config_hp300(void); -extern void config_q40(void); -extern void config_sun3x(void); - -#define MASK_256K 0xfffc0000 - -extern void paging_init(void); - -static void __init m68k_parse_bootinfo(const struct bi_record *record) -{ - while (record->tag != BI_LAST) { - int unknown = 0; - const unsigned long *data = record->data; - - switch (record->tag) { - case BI_MACHTYPE: - case BI_CPUTYPE: - case BI_FPUTYPE: - case BI_MMUTYPE: - /* Already set up by head.S */ - break; - - case BI_MEMCHUNK: - if (m68k_num_memory < NUM_MEMINFO) { - m68k_memory[m68k_num_memory].addr = data[0]; - m68k_memory[m68k_num_memory].size = data[1]; - m68k_num_memory++; - } else - printk("m68k_parse_bootinfo: too many memory chunks\n"); - break; - - case BI_RAMDISK: - m68k_ramdisk.addr = data[0]; - m68k_ramdisk.size = data[1]; - break; - - case BI_COMMAND_LINE: - strlcpy(m68k_command_line, (const char *)data, - sizeof(m68k_command_line)); - break; - - default: - if (MACH_IS_AMIGA) - unknown = amiga_parse_bootinfo(record); - else if (MACH_IS_ATARI) - unknown = atari_parse_bootinfo(record); - else if (MACH_IS_MAC) - unknown = mac_parse_bootinfo(record); - else if (MACH_IS_Q40) - unknown = q40_parse_bootinfo(record); - else if (MACH_IS_BVME6000) - unknown = bvme6000_parse_bootinfo(record); - else if (MACH_IS_MVME16x) - unknown = mvme16x_parse_bootinfo(record); - else if (MACH_IS_MVME147) - unknown = mvme147_parse_bootinfo(record); - else if (MACH_IS_HP300) - unknown = hp300_parse_bootinfo(record); - else if (MACH_IS_APOLLO) - unknown = apollo_parse_bootinfo(record); - else - unknown = 1; - } - if (unknown) - printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n", - record->tag); - record = (struct bi_record *)((unsigned long)record + - record->size); - } - - m68k_realnum_memory = m68k_num_memory; -#ifdef CONFIG_SINGLE_MEMORY_CHUNK - if (m68k_num_memory > 1) { - printk("Ignoring last %i chunks of physical memory\n", - (m68k_num_memory - 1)); - m68k_num_memory = 1; - } -#endif -} - -void __init setup_arch(char **cmdline_p) -{ - int i; - - /* The bootinfo is located right after the kernel bss */ - m68k_parse_bootinfo((const struct bi_record *)_end); - - if (CPU_IS_040) - m68k_is040or060 = 4; - else if (CPU_IS_060) - m68k_is040or060 = 6; - - /* FIXME: m68k_fputype is passed in by Penguin booter, which can - * be confused by software FPU emulation. BEWARE. - * We should really do our own FPU check at startup. - * [what do we do with buggy 68LC040s? if we have problems - * with them, we should add a test to check_bugs() below] */ -#ifndef CONFIG_M68KFPU_EMU_ONLY - /* clear the fpu if we have one */ - if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) { - volatile int zero = 0; - asm volatile ("frestore %0" : : "m" (zero)); - } -#endif - - if (CPU_IS_060) { - u32 pcr; - - asm (".chip 68060; movec %%pcr,%0; .chip 68k" - : "=d" (pcr)); - if (((pcr >> 8) & 0xff) <= 5) { - printk("Enabling workaround for errata I14\n"); - asm (".chip 68060; movec %0,%%pcr; .chip 68k" - : : "d" (pcr | 0x20)); - } - } - - init_mm.start_code = PAGE_OFFSET; - init_mm.end_code = (unsigned long)_etext; - init_mm.end_data = (unsigned long)_edata; - init_mm.brk = (unsigned long)_end; - - *cmdline_p = m68k_command_line; - memcpy(boot_command_line, *cmdline_p, CL_SIZE); - - parse_early_param(); - -#ifdef CONFIG_DUMMY_CONSOLE - conswitchp = &dummy_con; -#endif - - switch (m68k_machtype) { -#ifdef CONFIG_AMIGA - case MACH_AMIGA: - config_amiga(); - break; -#endif -#ifdef CONFIG_ATARI - case MACH_ATARI: - config_atari(); - break; -#endif -#ifdef CONFIG_MAC - case MACH_MAC: - config_mac(); - break; -#endif -#ifdef CONFIG_SUN3 - case MACH_SUN3: - config_sun3(); - break; -#endif -#ifdef CONFIG_APOLLO - case MACH_APOLLO: - config_apollo(); - break; -#endif -#ifdef CONFIG_MVME147 - case MACH_MVME147: - config_mvme147(); - break; -#endif -#ifdef CONFIG_MVME16x - case MACH_MVME16x: - config_mvme16x(); - break; -#endif -#ifdef CONFIG_BVME6000 - case MACH_BVME6000: - config_bvme6000(); - break; -#endif -#ifdef CONFIG_HP300 - case MACH_HP300: - config_hp300(); - break; -#endif -#ifdef CONFIG_Q40 - case MACH_Q40: - config_q40(); - break; -#endif -#ifdef CONFIG_SUN3X - case MACH_SUN3X: - config_sun3x(); - break; -#endif - default: - panic("No configuration setup"); - } - -#ifdef CONFIG_NATFEAT - nf_init(); -#endif - - paging_init(); - -#ifndef CONFIG_SUN3 - for (i = 1; i < m68k_num_memory; i++) - free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr, - m68k_memory[i].size); -#ifdef CONFIG_BLK_DEV_INITRD - if (m68k_ramdisk.size) { - reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)), - m68k_ramdisk.addr, m68k_ramdisk.size, - BOOTMEM_DEFAULT); - initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); - initrd_end = initrd_start + m68k_ramdisk.size; - printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end); - } -#endif - -#ifdef CONFIG_ATARI - if (MACH_IS_ATARI) - atari_stram_reserve_pages((void *)availmem); -#endif -#ifdef CONFIG_SUN3X - if (MACH_IS_SUN3X) { - dvma_init(); - } -#endif - -#endif /* !CONFIG_SUN3 */ - -/* set ISA defs early as possible */ -#if defined(CONFIG_ISA) && defined(MULTI_ISA) - if (MACH_IS_Q40) { - isa_type = ISA_TYPE_Q40; - isa_sex = 0; - } -#ifdef CONFIG_AMIGA_PCMCIA - if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { - isa_type = ISA_TYPE_AG; - isa_sex = 1; - } -#endif -#endif -} - -static int show_cpuinfo(struct seq_file *m, void *v) -{ - const char *cpu, *mmu, *fpu; - unsigned long clockfreq, clockfactor; - -#define LOOP_CYCLES_68020 (8) -#define LOOP_CYCLES_68030 (8) -#define LOOP_CYCLES_68040 (3) -#define LOOP_CYCLES_68060 (1) - - if (CPU_IS_020) { - cpu = "68020"; - clockfactor = LOOP_CYCLES_68020; - } else if (CPU_IS_030) { - cpu = "68030"; - clockfactor = LOOP_CYCLES_68030; - } else if (CPU_IS_040) { - cpu = "68040"; - clockfactor = LOOP_CYCLES_68040; - } else if (CPU_IS_060) { - cpu = "68060"; - clockfactor = LOOP_CYCLES_68060; - } else { - cpu = "680x0"; - clockfactor = 0; - } - -#ifdef CONFIG_M68KFPU_EMU_ONLY - fpu = "none(soft float)"; +#ifdef CONFIG_MMU +#include "setup_mm.c" #else - if (m68k_fputype & FPU_68881) - fpu = "68881"; - else if (m68k_fputype & FPU_68882) - fpu = "68882"; - else if (m68k_fputype & FPU_68040) - fpu = "68040"; - else if (m68k_fputype & FPU_68060) - fpu = "68060"; - else if (m68k_fputype & FPU_SUNFPA) - fpu = "Sun FPA"; - else - fpu = "none"; -#endif - - if (m68k_mmutype & MMU_68851) - mmu = "68851"; - else if (m68k_mmutype & MMU_68030) - mmu = "68030"; - else if (m68k_mmutype & MMU_68040) - mmu = "68040"; - else if (m68k_mmutype & MMU_68060) - mmu = "68060"; - else if (m68k_mmutype & MMU_SUN3) - mmu = "Sun-3"; - else if (m68k_mmutype & MMU_APOLLO) - mmu = "Apollo"; - else - mmu = "unknown"; - - clockfreq = loops_per_jiffy * HZ * clockfactor; - - seq_printf(m, "CPU:\t\t%s\n" - "MMU:\t\t%s\n" - "FPU:\t\t%s\n" - "Clocking:\t%lu.%1luMHz\n" - "BogoMips:\t%lu.%02lu\n" - "Calibration:\t%lu loops\n", - cpu, mmu, fpu, - clockfreq/1000000,(clockfreq/100000)%10, - loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, - loops_per_jiffy); - return 0; -} - -static void *c_start(struct seq_file *m, loff_t *pos) -{ - return *pos < 1 ? (void *)1 : NULL; -} -static void *c_next(struct seq_file *m, void *v, loff_t *pos) -{ - ++*pos; - return NULL; -} -static void c_stop(struct seq_file *m, void *v) -{ -} -const struct seq_operations cpuinfo_op = { - .start = c_start, - .next = c_next, - .stop = c_stop, - .show = show_cpuinfo, -}; - -#ifdef CONFIG_PROC_HARDWARE -static int hardware_proc_show(struct seq_file *m, void *v) -{ - char model[80]; - unsigned long mem; - int i; - - if (mach_get_model) - mach_get_model(model); - else - strcpy(model, "Unknown m68k"); - - seq_printf(m, "Model:\t\t%s\n", model); - for (mem = 0, i = 0; i < m68k_num_memory; i++) - mem += m68k_memory[i].size; - seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); - - if (mach_get_hardware_list) - mach_get_hardware_list(m); - - return 0; -} - -static int hardware_proc_open(struct inode *inode, struct file *file) -{ - return single_open(file, hardware_proc_show, NULL); -} - -static const struct file_operations hardware_proc_fops = { - .open = hardware_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int __init proc_hardware_init(void) -{ - proc_create("hardware", 0, NULL, &hardware_proc_fops); - return 0; -} -module_init(proc_hardware_init); +#include "setup_no.c" #endif - -void check_bugs(void) -{ -#ifndef CONFIG_M68KFPU_EMU - if (m68k_fputype == 0) { - printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " - "WHICH IS REQUIRED BY LINUX/M68K ***\n"); - printk(KERN_EMERG "Upgrade your hardware or join the FPU " - "emulation project\n"); - panic("no FPU"); - } -#endif /* !CONFIG_M68KFPU_EMU */ -} - -#ifdef CONFIG_ADB -static int __init adb_probe_sync_enable (char *str) { - extern int __adb_probe_sync; - __adb_probe_sync = 1; - return 1; -} - -__setup("adb_sync", adb_probe_sync_enable); -#endif /* CONFIG_ADB */ diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c new file mode 100644 index 0000000..334d836 --- /dev/null +++ b/arch/m68k/kernel/setup_mm.c @@ -0,0 +1,533 @@ +/* + * linux/arch/m68k/kernel/setup.c + * + * Copyright (C) 1995 Hamish Macdonald + */ + +/* + * This file handles the architecture-dependent parts of system setup + */ + +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/sched.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/fs.h> +#include <linux/console.h> +#include <linux/genhd.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/bootmem.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/module.h> +#include <linux/initrd.h> + +#include <asm/bootinfo.h> +#include <asm/sections.h> +#include <asm/setup.h> +#include <asm/fpu.h> +#include <asm/irq.h> +#include <asm/io.h> +#include <asm/machdep.h> +#ifdef CONFIG_AMIGA +#include <asm/amigahw.h> +#endif +#ifdef CONFIG_ATARI +#include <asm/atarihw.h> +#include <asm/atari_stram.h> +#endif +#ifdef CONFIG_SUN3X +#include <asm/dvma.h> +#endif +#include <asm/natfeat.h> + +#if !FPSTATESIZE || !NR_IRQS +#warning No CPU/platform type selected, your kernel will not work! +#warning Are you building an allnoconfig kernel? +#endif + +unsigned long m68k_machtype; +EXPORT_SYMBOL(m68k_machtype); +unsigned long m68k_cputype; +EXPORT_SYMBOL(m68k_cputype); +unsigned long m68k_fputype; +unsigned long m68k_mmutype; +EXPORT_SYMBOL(m68k_mmutype); +#ifdef CONFIG_VME +unsigned long vme_brdtype; +EXPORT_SYMBOL(vme_brdtype); +#endif + +int m68k_is040or060; +EXPORT_SYMBOL(m68k_is040or060); + +extern unsigned long availmem; + +int m68k_num_memory; +EXPORT_SYMBOL(m68k_num_memory); +int m68k_realnum_memory; +EXPORT_SYMBOL(m68k_realnum_memory); +unsigned long m68k_memoffset; +struct mem_info m68k_memory[NUM_MEMINFO]; +EXPORT_SYMBOL(m68k_memory); + +struct mem_info m68k_ramdisk; + +static char m68k_command_line[CL_SIZE]; + +void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL; +/* machine dependent irq functions */ +void (*mach_init_IRQ) (void) __initdata = NULL; +void (*mach_get_model) (char *model); +void (*mach_get_hardware_list) (struct seq_file *m); +/* machine dependent timer functions */ +unsigned long (*mach_gettimeoffset) (void); +int (*mach_hwclk) (int, struct rtc_time*); +EXPORT_SYMBOL(mach_hwclk); +int (*mach_set_clock_mmss) (unsigned long); +unsigned int (*mach_get_ss)(void); +int (*mach_get_rtc_pll)(struct rtc_pll_info *); +int (*mach_set_rtc_pll)(struct rtc_pll_info *); +EXPORT_SYMBOL(mach_get_ss); +EXPORT_SYMBOL(mach_get_rtc_pll); +EXPORT_SYMBOL(mach_set_rtc_pll); +void (*mach_reset)( void ); +void (*mach_halt)( void ); +void (*mach_power_off)( void ); +long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */ +#ifdef CONFIG_HEARTBEAT +void (*mach_heartbeat) (int); +EXPORT_SYMBOL(mach_heartbeat); +#endif +#ifdef CONFIG_M68K_L2_CACHE +void (*mach_l2_flush) (int); +#endif +#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE) +void (*mach_beep)(unsigned int, unsigned int); +EXPORT_SYMBOL(mach_beep); +#endif +#if defined(CONFIG_ISA) && defined(MULTI_ISA) +int isa_type; +int isa_sex; +EXPORT_SYMBOL(isa_type); +EXPORT_SYMBOL(isa_sex); +#endif + +extern int amiga_parse_bootinfo(const struct bi_record *); +extern int atari_parse_bootinfo(const struct bi_record *); +extern int mac_parse_bootinfo(const struct bi_record *); +extern int q40_parse_bootinfo(const struct bi_record *); +extern int bvme6000_parse_bootinfo(const struct bi_record *); +extern int mvme16x_parse_bootinfo(const struct bi_record *); +extern int mvme147_parse_bootinfo(const struct bi_record *); +extern int hp300_parse_bootinfo(const struct bi_record *); +extern int apollo_parse_bootinfo(const struct bi_record *); + +extern void config_amiga(void); +extern void config_atari(void); +extern void config_mac(void); +extern void config_sun3(void); +extern void config_apollo(void); +extern void config_mvme147(void); +extern void config_mvme16x(void); +extern void config_bvme6000(void); +extern void config_hp300(void); +extern void config_q40(void); +extern void config_sun3x(void); + +#define MASK_256K 0xfffc0000 + +extern void paging_init(void); + +static void __init m68k_parse_bootinfo(const struct bi_record *record) +{ + while (record->tag != BI_LAST) { + int unknown = 0; + const unsigned long *data = record->data; + + switch (record->tag) { + case BI_MACHTYPE: + case BI_CPUTYPE: + case BI_FPUTYPE: + case BI_MMUTYPE: + /* Already set up by head.S */ + break; + + case BI_MEMCHUNK: + if (m68k_num_memory < NUM_MEMINFO) { + m68k_memory[m68k_num_memory].addr = data[0]; + m68k_memory[m68k_num_memory].size = data[1]; + m68k_num_memory++; + } else + printk("m68k_parse_bootinfo: too many memory chunks\n"); + break; + + case BI_RAMDISK: + m68k_ramdisk.addr = data[0]; + m68k_ramdisk.size = data[1]; + break; + + case BI_COMMAND_LINE: + strlcpy(m68k_command_line, (const char *)data, + sizeof(m68k_command_line)); + break; + + default: + if (MACH_IS_AMIGA) + unknown = amiga_parse_bootinfo(record); + else if (MACH_IS_ATARI) + unknown = atari_parse_bootinfo(record); + else if (MACH_IS_MAC) + unknown = mac_parse_bootinfo(record); + else if (MACH_IS_Q40) + unknown = q40_parse_bootinfo(record); + else if (MACH_IS_BVME6000) + unknown = bvme6000_parse_bootinfo(record); + else if (MACH_IS_MVME16x) + unknown = mvme16x_parse_bootinfo(record); + else if (MACH_IS_MVME147) + unknown = mvme147_parse_bootinfo(record); + else if (MACH_IS_HP300) + unknown = hp300_parse_bootinfo(record); + else if (MACH_IS_APOLLO) + unknown = apollo_parse_bootinfo(record); + else + unknown = 1; + } + if (unknown) + printk("m68k_parse_bootinfo: unknown tag 0x%04x ignored\n", + record->tag); + record = (struct bi_record *)((unsigned long)record + + record->size); + } + + m68k_realnum_memory = m68k_num_memory; +#ifdef CONFIG_SINGLE_MEMORY_CHUNK + if (m68k_num_memory > 1) { + printk("Ignoring last %i chunks of physical memory\n", + (m68k_num_memory - 1)); + m68k_num_memory = 1; + } +#endif +} + +void __init setup_arch(char **cmdline_p) +{ + int i; + + /* The bootinfo is located right after the kernel bss */ + m68k_parse_bootinfo((const struct bi_record *)_end); + + if (CPU_IS_040) + m68k_is040or060 = 4; + else if (CPU_IS_060) + m68k_is040or060 = 6; + + /* FIXME: m68k_fputype is passed in by Penguin booter, which can + * be confused by software FPU emulation. BEWARE. + * We should really do our own FPU check at startup. + * [what do we do with buggy 68LC040s? if we have problems + * with them, we should add a test to check_bugs() below] */ +#ifndef CONFIG_M68KFPU_EMU_ONLY + /* clear the fpu if we have one */ + if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) { + volatile int zero = 0; + asm volatile ("frestore %0" : : "m" (zero)); + } +#endif + + if (CPU_IS_060) { + u32 pcr; + + asm (".chip 68060; movec %%pcr,%0; .chip 68k" + : "=d" (pcr)); + if (((pcr >> 8) & 0xff) <= 5) { + printk("Enabling workaround for errata I14\n"); + asm (".chip 68060; movec %0,%%pcr; .chip 68k" + : : "d" (pcr | 0x20)); + } + } + + init_mm.start_code = PAGE_OFFSET; + init_mm.end_code = (unsigned long)_etext; + init_mm.end_data = (unsigned long)_edata; + init_mm.brk = (unsigned long)_end; + + *cmdline_p = m68k_command_line; + memcpy(boot_command_line, *cmdline_p, CL_SIZE); + + parse_early_param(); + +#ifdef CONFIG_DUMMY_CONSOLE + conswitchp = &dummy_con; +#endif + + switch (m68k_machtype) { +#ifdef CONFIG_AMIGA + case MACH_AMIGA: + config_amiga(); + break; +#endif +#ifdef CONFIG_ATARI + case MACH_ATARI: + config_atari(); + break; +#endif +#ifdef CONFIG_MAC + case MACH_MAC: + config_mac(); + break; +#endif +#ifdef CONFIG_SUN3 + case MACH_SUN3: + config_sun3(); + break; +#endif +#ifdef CONFIG_APOLLO + case MACH_APOLLO: + config_apollo(); + break; +#endif +#ifdef CONFIG_MVME147 + case MACH_MVME147: + config_mvme147(); + break; +#endif +#ifdef CONFIG_MVME16x + case MACH_MVME16x: + config_mvme16x(); + break; +#endif +#ifdef CONFIG_BVME6000 + case MACH_BVME6000: + config_bvme6000(); + break; +#endif +#ifdef CONFIG_HP300 + case MACH_HP300: + config_hp300(); + break; +#endif +#ifdef CONFIG_Q40 + case MACH_Q40: + config_q40(); + break; +#endif +#ifdef CONFIG_SUN3X + case MACH_SUN3X: + config_sun3x(); + break; +#endif + default: + panic("No configuration setup"); + } + +#ifdef CONFIG_NATFEAT + nf_init(); +#endif + + paging_init(); + +#ifndef CONFIG_SUN3 + for (i = 1; i < m68k_num_memory; i++) + free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr, + m68k_memory[i].size); +#ifdef CONFIG_BLK_DEV_INITRD + if (m68k_ramdisk.size) { + reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)), + m68k_ramdisk.addr, m68k_ramdisk.size, + BOOTMEM_DEFAULT); + initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr); + initrd_end = initrd_start + m68k_ramdisk.size; + printk("initrd: %08lx - %08lx\n", initrd_start, initrd_end); + } +#endif + +#ifdef CONFIG_ATARI + if (MACH_IS_ATARI) + atari_stram_reserve_pages((void *)availmem); +#endif +#ifdef CONFIG_SUN3X + if (MACH_IS_SUN3X) { + dvma_init(); + } +#endif + +#endif /* !CONFIG_SUN3 */ + +/* set ISA defs early as possible */ +#if defined(CONFIG_ISA) && defined(MULTI_ISA) + if (MACH_IS_Q40) { + isa_type = ISA_TYPE_Q40; + isa_sex = 0; + } +#ifdef CONFIG_AMIGA_PCMCIA + if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) { + isa_type = ISA_TYPE_AG; + isa_sex = 1; + } +#endif +#endif +} + +static int show_cpuinfo(struct seq_file *m, void *v) +{ + const char *cpu, *mmu, *fpu; + unsigned long clockfreq, clockfactor; + +#define LOOP_CYCLES_68020 (8) +#define LOOP_CYCLES_68030 (8) +#define LOOP_CYCLES_68040 (3) +#define LOOP_CYCLES_68060 (1) + + if (CPU_IS_020) { + cpu = "68020"; + clockfactor = LOOP_CYCLES_68020; + } else if (CPU_IS_030) { + cpu = "68030"; + clockfactor = LOOP_CYCLES_68030; + } else if (CPU_IS_040) { + cpu = "68040"; + clockfactor = LOOP_CYCLES_68040; + } else if (CPU_IS_060) { + cpu = "68060"; + clockfactor = LOOP_CYCLES_68060; + } else { + cpu = "680x0"; + clockfactor = 0; + } + +#ifdef CONFIG_M68KFPU_EMU_ONLY + fpu = "none(soft float)"; +#else + if (m68k_fputype & FPU_68881) + fpu = "68881"; + else if (m68k_fputype & FPU_68882) + fpu = "68882"; + else if (m68k_fputype & FPU_68040) + fpu = "68040"; + else if (m68k_fputype & FPU_68060) + fpu = "68060"; + else if (m68k_fputype & FPU_SUNFPA) + fpu = "Sun FPA"; + else + fpu = "none"; +#endif + + if (m68k_mmutype & MMU_68851) + mmu = "68851"; + else if (m68k_mmutype & MMU_68030) + mmu = "68030"; + else if (m68k_mmutype & MMU_68040) + mmu = "68040"; + else if (m68k_mmutype & MMU_68060) + mmu = "68060"; + else if (m68k_mmutype & MMU_SUN3) + mmu = "Sun-3"; + else if (m68k_mmutype & MMU_APOLLO) + mmu = "Apollo"; + else + mmu = "unknown"; + + clockfreq = loops_per_jiffy * HZ * clockfactor; + + seq_printf(m, "CPU:\t\t%s\n" + "MMU:\t\t%s\n" + "FPU:\t\t%s\n" + "Clocking:\t%lu.%1luMHz\n" + "BogoMips:\t%lu.%02lu\n" + "Calibration:\t%lu loops\n", + cpu, mmu, fpu, + clockfreq/1000000,(clockfreq/100000)%10, + loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100, + loops_per_jiffy); + return 0; +} + +static void *c_start(struct seq_file *m, loff_t *pos) +{ + return *pos < 1 ? (void *)1 : NULL; +} +static void *c_next(struct seq_file *m, void *v, loff_t *pos) +{ + ++*pos; + return NULL; +} +static void c_stop(struct seq_file *m, void *v) +{ +} +const struct seq_operations cpuinfo_op = { + .start = c_start, + .next = c_next, + .stop = c_stop, + .show = show_cpuinfo, +}; + +#ifdef CONFIG_PROC_HARDWARE +static int hardware_proc_show(struct seq_file *m, void *v) +{ + char model[80]; + unsigned long mem; + int i; + + if (mach_get_model) + mach_get_model(model); + else + strcpy(model, "Unknown m68k"); + + seq_printf(m, "Model:\t\t%s\n", model); + for (mem = 0, i = 0; i < m68k_num_memory; i++) + mem += m68k_memory[i].size; + seq_printf(m, "System Memory:\t%ldK\n", mem >> 10); + + if (mach_get_hardware_list) + mach_get_hardware_list(m); + + return 0; +} + +static int hardware_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, hardware_proc_show, NULL); +} + +static const struct file_operations hardware_proc_fops = { + .open = hardware_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int __init proc_hardware_init(void) +{ + proc_create("hardware", 0, NULL, &hardware_proc_fops); + return 0; +} +module_init(proc_hardware_init); +#endif + +void check_bugs(void) +{ +#ifndef CONFIG_M68KFPU_EMU + if (m68k_fputype == 0) { + printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, " + "WHICH IS REQUIRED BY LINUX/M68K ***\n"); + printk(KERN_EMERG "Upgrade your hardware or join the FPU " + "emulation project\n"); + panic("no FPU"); + } +#endif /* !CONFIG_M68KFPU_EMU */ +} + +#ifdef CONFIG_ADB +static int __init adb_probe_sync_enable (char *str) { + extern int __adb_probe_sync; + __adb_probe_sync = 1; + return 1; +} + +__setup("adb_sync", adb_probe_sync_enable); +#endif /* CONFIG_ADB */ diff --git a/arch/m68k/kernel/setup_no.c b/arch/m68k/kernel/setup_no.c new file mode 100644 index 0000000..16b2de7 --- /dev/null +++ b/arch/m68k/kernel/setup_no.c @@ -0,0 +1,317 @@ +/* + * linux/arch/m68knommu/kernel/setup.c + * + * Copyright (C) 1999-2007 Greg Ungerer (gerg@snapgear.com) + * Copyright (C) 1998,1999 D. Jeff Dionne <jeff@uClinux.org> + * Copyleft ()) 2000 James D. Schettine {james@telos-systems.com} + * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> + * Copyright (C) 1995 Hamish Macdonald + * Copyright (C) 2000 Lineo Inc. (www.lineo.com) + * Copyright (C) 2001 Lineo, Inc. <www.lineo.com> + * + * 68VZ328 Fixes/support Evan Stawnyczy <e@lineo.ca> + */ + +/* + * This file handles the architecture-dependent parts of system setup + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/fb.h> +#include <linux/module.h> +#include <linux/mm.h> +#include <linux/console.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/bootmem.h> +#include <linux/seq_file.h> +#include <linux/init.h> +#include <linux/initrd.h> +#include <linux/root_dev.h> + +#include <asm/setup.h> +#include <asm/irq.h> +#include <asm/machdep.h> +#include <asm/pgtable.h> + +unsigned long memory_start; +unsigned long memory_end; + +EXPORT_SYMBOL(memory_start); +EXPORT_SYMBOL(memory_end); + +char __initdata command_line[COMMAND_LINE_SIZE]; + +/* machine dependent timer functions */ +void (*mach_gettod)(int*, int*, int*, int*, int*, int*); +int (*mach_set_clock_mmss)(unsigned long); + +/* machine dependent reboot functions */ +void (*mach_reset)(void); +void (*mach_halt)(void); +void (*mach_power_off)(void); + +#ifdef CONFIG_M68328 +#define CPU_NAME "MC68328" +#endif +#ifdef CONFIG_M68EZ328 +#define CPU_NAME "MC68EZ328" +#endif +#ifdef CONFIG_M68VZ328 +#define CPU_NAME "MC68VZ328" +#endif +#ifdef CONFIG_M68360 +#define CPU_NAME "MC68360" +#endif +#ifndef CPU_NAME +#define CPU_NAME "UNKNOWN" +#endif + +/* + * Different cores have different instruction execution timings. + * The old/traditional 68000 cores are basically all the same, at 16. + * The ColdFire cores vary a little, their values are defined in their + * headers. We default to the standard 68000 value here. + */ +#ifndef CPU_INSTR_PER_JIFFY +#define CPU_INSTR_PER_JIFFY 16 +#endif + +extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end; +extern int _ramstart, _ramend; + +#if defined(CONFIG_UBOOT) +/* + * parse_uboot_commandline + * + * Copies u-boot commandline arguments and store them in the proper linux + * variables. + * + * Assumes: + * _init_sp global contains the address in the stack pointer when the + * kernel starts (see head.S::_start) + * + * U-Boot calling convention: + * (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end); + * + * _init_sp can be parsed as such + * + * _init_sp+00 = u-boot cmd after jsr into kernel (skip) + * _init_sp+04 = &kernel board_info (residual data) + * _init_sp+08 = &initrd_start + * _init_sp+12 = &initrd_end + * _init_sp+16 = &cmd_start + * _init_sp+20 = &cmd_end + * + * This also assumes that the memory locations pointed to are still + * unmodified. U-boot places them near the end of external SDRAM. + * + * Argument(s): + * commandp = the linux commandline arg container to fill. + * size = the sizeof commandp. + * + * Returns: + */ +void parse_uboot_commandline(char *commandp, int size) +{ + extern unsigned long _init_sp; + unsigned long *sp; + unsigned long uboot_kbd; + unsigned long uboot_initrd_start, uboot_initrd_end; + unsigned long uboot_cmd_start, uboot_cmd_end; + + + sp = (unsigned long *)_init_sp; + uboot_kbd = sp[1]; + uboot_initrd_start = sp[2]; + uboot_initrd_end = sp[3]; + uboot_cmd_start = sp[4]; + uboot_cmd_end = sp[5]; + + if (uboot_cmd_start && uboot_cmd_end) + strncpy(commandp, (const char *)uboot_cmd_start, size); +#if defined(CONFIG_BLK_DEV_INITRD) + if (uboot_initrd_start && uboot_initrd_end && + (uboot_initrd_end > uboot_initrd_start)) { + initrd_start = uboot_initrd_start; + initrd_end = uboot_initrd_end; + ROOT_DEV = Root_RAM0; + printk(KERN_INFO "initrd at 0x%lx:0x%lx\n", + initrd_start, initrd_end); + } +#endif /* if defined(CONFIG_BLK_DEV_INITRD) */ +} +#endif /* #if defined(CONFIG_UBOOT) */ + +void __init setup_arch(char **cmdline_p) +{ + int bootmap_size; + + memory_start = PAGE_ALIGN(_ramstart); + memory_end = _ramend; + + init_mm.start_code = (unsigned long) &_stext; + init_mm.end_code = (unsigned long) &_etext; + init_mm.end_data = (unsigned long) &_edata; + init_mm.brk = (unsigned long) 0; + + config_BSP(&command_line[0], sizeof(command_line)); + +#if defined(CONFIG_BOOTPARAM) + strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line)); + command_line[sizeof(command_line) - 1] = 0; +#endif /* CONFIG_BOOTPARAM */ + +#if defined(CONFIG_UBOOT) + /* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */ + #if defined(CONFIG_BOOTPARAM) + /* Add the whitespace separator */ + command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' '; + /* Parse uboot command line into the rest of the buffer */ + parse_uboot_commandline( + &command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)], + (sizeof(command_line) - + (strlen(CONFIG_BOOTPARAM_STRING)+1))); + /* Only CONFIG_UBOOT defined, create cmdline */ + #else + parse_uboot_commandline(&command_line[0], sizeof(command_line)); + #endif /* CONFIG_BOOTPARAM */ + command_line[sizeof(command_line) - 1] = 0; +#endif /* CONFIG_UBOOT */ + + printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU_NAME "\n"); + +#ifdef CONFIG_UCDIMM + printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n"); +#endif +#ifdef CONFIG_M68VZ328 + printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n"); +#endif +#ifdef CONFIG_COLDFIRE + printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n"); +#ifdef CONFIG_M5307 + printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n"); +#endif +#ifdef CONFIG_ELITE + printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n"); +#endif +#endif + printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); + +#if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 ) + printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n"); +#endif +#if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 ) + printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n"); +#endif +#if defined (CONFIG_M68360) + printk(KERN_INFO "QUICC port done by SED Systems <hamilton@sedsystems.ca>,\n"); + printk(KERN_INFO "based on 2.0.38 port by Lineo Inc. <mleslie@lineo.com>.\n"); +#endif +#ifdef CONFIG_DRAGEN2 + printk(KERN_INFO "DragonEngine II board support by Georges Menie\n"); +#endif +#ifdef CONFIG_M5235EVB + printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n"); +#endif + + pr_debug("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x " + "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext, + (int) &_sdata, (int) &_edata, + (int) &_sbss, (int) &_ebss); + pr_debug("MEMORY -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x\n ", + (int) &_ebss, (int) memory_start, + (int) memory_start, (int) memory_end); + + /* Keep a copy of command line */ + *cmdline_p = &command_line[0]; + memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); + boot_command_line[COMMAND_LINE_SIZE-1] = 0; + +#if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE) + conswitchp = &dummy_con; +#endif + + /* + * Give all the memory to the bootmap allocator, tell it to put the + * boot mem_map at the start of memory. + */ + bootmap_size = init_bootmem_node( + NODE_DATA(0), + memory_start >> PAGE_SHIFT, /* map goes here */ + PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */ + memory_end >> PAGE_SHIFT); + /* + * Free the usable memory, we have to make sure we do not free + * the bootmem bitmap so we then reserve it after freeing it :-) + */ + free_bootmem(memory_start, memory_end - memory_start); + reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT); + +#if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD) + if ((initrd_start > 0) && (initrd_start < initrd_end) && + (initrd_end < memory_end)) + reserve_bootmem(initrd_start, initrd_end - initrd_start, + BOOTMEM_DEFAULT); +#endif /* if defined(CONFIG_BLK_DEV_INITRD) */ + + /* + * Get kmalloc into gear. + */ + paging_init(); +} + +/* + * Get CPU information for use by the procfs. + */ +static int show_cpuinfo(struct seq_file *m, void *v) +{ + char *cpu, *mmu, *fpu; + u_long clockfreq; + + cpu = CPU_NAME; + mmu = "none"; + fpu = "none"; + clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY; + + seq_printf(m, "CPU:\t\t%s\n" + "MMU:\t\t%s\n" + "FPU:\t\t%s\n" + "Clocking:\t%lu.%1luMHz\n" + "BogoMips:\t%lu.%02lu\n" + "Calibration:\t%lu loops\n", + cpu, mmu, fpu, + clockfreq / 1000000, + (clockfreq / 100000) % 10, + (loops_per_jiffy * HZ) / 500000, + ((loops_per_jiffy * HZ) / 5000) % 100, + (loops_per_jiffy * HZ)); + + return 0; +} + +static void *c_start(struct seq_file *m, loff_t *pos) +{ + return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; +} + +static void *c_next(struct seq_file *m, void *v, loff_t *pos) +{ + ++*pos; + return c_start(m, pos); +} + +static void c_stop(struct seq_file *m, void *v) +{ +} + +const struct seq_operations cpuinfo_op = { + .start = c_start, + .next = c_next, + .stop = c_stop, + .show = show_cpuinfo, +}; + diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c index a0afc23..2e25713 100644 --- a/arch/m68k/kernel/signal.c +++ b/arch/m68k/kernel/signal.c @@ -1,1017 +1,5 @@ -/* - * linux/arch/m68k/kernel/signal.c - * - * Copyright (C) 1991, 1992 Linus Torvalds - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file COPYING in the main directory of this archive - * for more details. - */ - -/* - * Linux/m68k support by Hamish Macdonald - * - * 68060 fixes by Jesper Skov - * - * 1997-12-01 Modified for POSIX.1b signals by Andreas Schwab - * - * mathemu support by Roman Zippel - * (Note: fpstate in the signal context is completely ignored for the emulator - * and the internal floating point format is put on stack) - */ - -/* - * ++roman (07/09/96): implemented signal stacks (specially for tosemu on - * Atari :-) Current limitation: Only one sigstack can be active at one time. - * If a second signal with SA_ONSTACK set arrives while working on a sigstack, - * SA_ONSTACK is ignored. This behaviour avoids lots of trouble with nested - * signal handlers! - */ - -#include <linux/sched.h> -#include <linux/mm.h> -#include <linux/kernel.h> -#include <linux/signal.h> -#include <linux/syscalls.h> -#include <linux/errno.h> -#include <linux/wait.h> -#include <linux/ptrace.h> -#include <linux/unistd.h> -#include <linux/stddef.h> -#include <linux/highuid.h> -#include <linux/personality.h> -#include <linux/tty.h> -#include <linux/binfmts.h> -#include <linux/module.h> - -#include <asm/setup.h> -#include <asm/uaccess.h> -#include <asm/pgtable.h> -#include <asm/traps.h> -#include <asm/ucontext.h> - -#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) - -static const int frame_extra_sizes[16] = { - [1] = -1, /* sizeof(((struct frame *)0)->un.fmt1), */ - [2] = sizeof(((struct frame *)0)->un.fmt2), - [3] = sizeof(((struct frame *)0)->un.fmt3), - [4] = sizeof(((struct frame *)0)->un.fmt4), - [5] = -1, /* sizeof(((struct frame *)0)->un.fmt5), */ - [6] = -1, /* sizeof(((struct frame *)0)->un.fmt6), */ - [7] = sizeof(((struct frame *)0)->un.fmt7), - [8] = -1, /* sizeof(((struct frame *)0)->un.fmt8), */ - [9] = sizeof(((struct frame *)0)->un.fmt9), - [10] = sizeof(((struct frame *)0)->un.fmta), - [11] = sizeof(((struct frame *)0)->un.fmtb), - [12] = -1, /* sizeof(((struct frame *)0)->un.fmtc), */ - [13] = -1, /* sizeof(((struct frame *)0)->un.fmtd), */ - [14] = -1, /* sizeof(((struct frame *)0)->un.fmte), */ - [15] = -1, /* sizeof(((struct frame *)0)->un.fmtf), */ -}; - -int handle_kernel_fault(struct pt_regs *regs) -{ - const struct exception_table_entry *fixup; - struct pt_regs *tregs; - - /* Are we prepared to handle this kernel fault? */ - fixup = search_exception_tables(regs->pc); - if (!fixup) - return 0; - - /* Create a new four word stack frame, discarding the old one. */ - regs->stkadj = frame_extra_sizes[regs->format]; - tregs = (struct pt_regs *)((long)regs + regs->stkadj); - tregs->vector = regs->vector; - tregs->format = 0; - tregs->pc = fixup->fixup; - tregs->sr = regs->sr; - - return 1; -} - -/* - * Atomically swap in the new signal mask, and wait for a signal. - */ -asmlinkage int -sys_sigsuspend(int unused0, int unused1, old_sigset_t mask) -{ - mask &= _BLOCKABLE; - spin_lock_irq(¤t->sighand->siglock); - current->saved_sigmask = current->blocked; - siginitset(¤t->blocked, mask); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - - current->state = TASK_INTERRUPTIBLE; - schedule(); - set_restore_sigmask(); - - return -ERESTARTNOHAND; -} - -asmlinkage int -sys_sigaction(int sig, const struct old_sigaction __user *act, - struct old_sigaction __user *oact) -{ - struct k_sigaction new_ka, old_ka; - int ret; - - if (act) { - old_sigset_t mask; - if (!access_ok(VERIFY_READ, act, sizeof(*act)) || - __get_user(new_ka.sa.sa_handler, &act->sa_handler) || - __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) || - __get_user(new_ka.sa.sa_flags, &act->sa_flags) || - __get_user(mask, &act->sa_mask)) - return -EFAULT; - siginitset(&new_ka.sa.sa_mask, mask); - } - - ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); - - if (!ret && oact) { - if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || - __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || - __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) || - __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || - __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) - return -EFAULT; - } - - return ret; -} - -asmlinkage int -sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss) -{ - return do_sigaltstack(uss, uoss, rdusp()); -} - - -/* - * Do a signal return; undo the signal stack. - * - * Keep the return code on the stack quadword aligned! - * That makes the cache flush below easier. - */ - -struct sigframe -{ - char __user *pretcode; - int sig; - int code; - struct sigcontext __user *psc; - char retcode[8]; - unsigned long extramask[_NSIG_WORDS-1]; - struct sigcontext sc; -}; - -struct rt_sigframe -{ - char __user *pretcode; - int sig; - struct siginfo __user *pinfo; - void __user *puc; - char retcode[8]; - struct siginfo info; - struct ucontext uc; -}; - - -static unsigned char fpu_version; /* version number of fpu, set by setup_frame */ - -static inline int restore_fpu_state(struct sigcontext *sc) -{ - int err = 1; - - if (FPU_IS_EMU) { - /* restore registers */ - memcpy(current->thread.fpcntl, sc->sc_fpcntl, 12); - memcpy(current->thread.fp, sc->sc_fpregs, 24); - return 0; - } - - if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) { - /* Verify the frame format. */ - if (!CPU_IS_060 && (sc->sc_fpstate[0] != fpu_version)) - goto out; - if (CPU_IS_020_OR_030) { - if (m68k_fputype & FPU_68881 && - !(sc->sc_fpstate[1] == 0x18 || sc->sc_fpstate[1] == 0xb4)) - goto out; - if (m68k_fputype & FPU_68882 && - !(sc->sc_fpstate[1] == 0x38 || sc->sc_fpstate[1] == 0xd4)) - goto out; - } else if (CPU_IS_040) { - if (!(sc->sc_fpstate[1] == 0x00 || - sc->sc_fpstate[1] == 0x28 || - sc->sc_fpstate[1] == 0x60)) - goto out; - } else if (CPU_IS_060) { - if (!(sc->sc_fpstate[3] == 0x00 || - sc->sc_fpstate[3] == 0x60 || - sc->sc_fpstate[3] == 0xe0)) - goto out; - } else - goto out; - - __asm__ volatile (".chip 68k/68881\n\t" - "fmovemx %0,%%fp0-%%fp1\n\t" - "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t" - ".chip 68k" - : /* no outputs */ - : "m" (*sc->sc_fpregs), "m" (*sc->sc_fpcntl)); - } - __asm__ volatile (".chip 68k/68881\n\t" - "frestore %0\n\t" - ".chip 68k" : : "m" (*sc->sc_fpstate)); - err = 0; - -out: - return err; -} - -#define FPCONTEXT_SIZE 216 -#define uc_fpstate uc_filler[0] -#define uc_formatvec uc_filler[FPCONTEXT_SIZE/4] -#define uc_extra uc_filler[FPCONTEXT_SIZE/4+1] - -static inline int rt_restore_fpu_state(struct ucontext __user *uc) -{ - unsigned char fpstate[FPCONTEXT_SIZE]; - int context_size = CPU_IS_060 ? 8 : 0; - fpregset_t fpregs; - int err = 1; - - if (FPU_IS_EMU) { - /* restore fpu control register */ - if (__copy_from_user(current->thread.fpcntl, - uc->uc_mcontext.fpregs.f_fpcntl, 12)) - goto out; - /* restore all other fpu register */ - if (__copy_from_user(current->thread.fp, - uc->uc_mcontext.fpregs.f_fpregs, 96)) - goto out; - return 0; - } - - if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate)) - goto out; - if (CPU_IS_060 ? fpstate[2] : fpstate[0]) { - if (!CPU_IS_060) - context_size = fpstate[1]; - /* Verify the frame format. */ - if (!CPU_IS_060 && (fpstate[0] != fpu_version)) - goto out; - if (CPU_IS_020_OR_030) { - if (m68k_fputype & FPU_68881 && - !(context_size == 0x18 || context_size == 0xb4)) - goto out; - if (m68k_fputype & FPU_68882 && - !(context_size == 0x38 || context_size == 0xd4)) - goto out; - } else if (CPU_IS_040) { - if (!(context_size == 0x00 || - context_size == 0x28 || - context_size == 0x60)) - goto out; - } else if (CPU_IS_060) { - if (!(fpstate[3] == 0x00 || - fpstate[3] == 0x60 || - fpstate[3] == 0xe0)) - goto out; - } else - goto out; - if (__copy_from_user(&fpregs, &uc->uc_mcontext.fpregs, - sizeof(fpregs))) - goto out; - __asm__ volatile (".chip 68k/68881\n\t" - "fmovemx %0,%%fp0-%%fp7\n\t" - "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t" - ".chip 68k" - : /* no outputs */ - : "m" (*fpregs.f_fpregs), - "m" (*fpregs.f_fpcntl)); - } - if (context_size && - __copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1, - context_size)) - goto out; - __asm__ volatile (".chip 68k/68881\n\t" - "frestore %0\n\t" - ".chip 68k" : : "m" (*fpstate)); - err = 0; - -out: - return err; -} - -static int mangle_kernel_stack(struct pt_regs *regs, int formatvec, - void __user *fp) -{ - int fsize = frame_extra_sizes[formatvec >> 12]; - if (fsize < 0) { - /* - * user process trying to return with weird frame format - */ -#ifdef DEBUG - printk("user process returning with weird frame format\n"); -#endif - return 1; - } - if (!fsize) { - regs->format = formatvec >> 12; - regs->vector = formatvec & 0xfff; - } else { - struct switch_stack *sw = (struct switch_stack *)regs - 1; - unsigned long buf[fsize / 2]; /* yes, twice as much */ - - /* that'll make sure that expansion won't crap over data */ - if (copy_from_user(buf + fsize / 4, fp, fsize)) - return 1; - - /* point of no return */ - regs->format = formatvec >> 12; - regs->vector = formatvec & 0xfff; -#define frame_offset (sizeof(struct pt_regs)+sizeof(struct switch_stack)) - __asm__ __volatile__ - (" movel %0,%/a0\n\t" - " subl %1,%/a0\n\t" /* make room on stack */ - " movel %/a0,%/sp\n\t" /* set stack pointer */ - /* move switch_stack and pt_regs */ - "1: movel %0@+,%/a0@+\n\t" - " dbra %2,1b\n\t" - " lea %/sp@(%c3),%/a0\n\t" /* add offset of fmt */ - " lsrl #2,%1\n\t" - " subql #1,%1\n\t" - /* copy to the gap we'd made */ - "2: movel %4@+,%/a0@+\n\t" - " dbra %1,2b\n\t" - " bral ret_from_signal\n" - : /* no outputs, it doesn't ever return */ - : "a" (sw), "d" (fsize), "d" (frame_offset/4-1), - "n" (frame_offset), "a" (buf + fsize/4) - : "a0"); -#undef frame_offset - } - return 0; -} - -static inline int -restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __user *fp) -{ - int formatvec; - struct sigcontext context; - int err; - - /* Always make any pending restarted system calls return -EINTR */ - current_thread_info()->restart_block.fn = do_no_restart_syscall; - - /* get previous context */ - if (copy_from_user(&context, usc, sizeof(context))) - goto badframe; - - /* restore passed registers */ - regs->d0 = context.sc_d0; - regs->d1 = context.sc_d1; - regs->a0 = context.sc_a0; - regs->a1 = context.sc_a1; - regs->sr = (regs->sr & 0xff00) | (context.sc_sr & 0xff); - regs->pc = context.sc_pc; - regs->orig_d0 = -1; /* disable syscall checks */ - wrusp(context.sc_usp); - formatvec = context.sc_formatvec; - - err = restore_fpu_state(&context); - - if (err || mangle_kernel_stack(regs, formatvec, fp)) - goto badframe; - - return 0; - -badframe: - return 1; -} - -static inline int -rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw, - struct ucontext __user *uc) -{ - int temp; - greg_t __user *gregs = uc->uc_mcontext.gregs; - unsigned long usp; - int err; - - /* Always make any pending restarted system calls return -EINTR */ - current_thread_info()->restart_block.fn = do_no_restart_syscall; - - err = __get_user(temp, &uc->uc_mcontext.version); - if (temp != MCONTEXT_VERSION) - goto badframe; - /* restore passed registers */ - err |= __get_user(regs->d0, &gregs[0]); - err |= __get_user(regs->d1, &gregs[1]); - err |= __get_user(regs->d2, &gregs[2]); - err |= __get_user(regs->d3, &gregs[3]); - err |= __get_user(regs->d4, &gregs[4]); - err |= __get_user(regs->d5, &gregs[5]); - err |= __get_user(sw->d6, &gregs[6]); - err |= __get_user(sw->d7, &gregs[7]); - err |= __get_user(regs->a0, &gregs[8]); - err |= __get_user(regs->a1, &gregs[9]); - err |= __get_user(regs->a2, &gregs[10]); - err |= __get_user(sw->a3, &gregs[11]); - err |= __get_user(sw->a4, &gregs[12]); - err |= __get_user(sw->a5, &gregs[13]); - err |= __get_user(sw->a6, &gregs[14]); - err |= __get_user(usp, &gregs[15]); - wrusp(usp); - err |= __get_user(regs->pc, &gregs[16]); - err |= __get_user(temp, &gregs[17]); - regs->sr = (regs->sr & 0xff00) | (temp & 0xff); - regs->orig_d0 = -1; /* disable syscall checks */ - err |= __get_user(temp, &uc->uc_formatvec); - - err |= rt_restore_fpu_state(uc); - - if (err || do_sigaltstack(&uc->uc_stack, NULL, usp) == -EFAULT) - goto badframe; - - if (mangle_kernel_stack(regs, temp, &uc->uc_extra)) - goto badframe; - - return 0; - -badframe: - return 1; -} - -asmlinkage int do_sigreturn(unsigned long __unused) -{ - struct switch_stack *sw = (struct switch_stack *) &__unused; - struct pt_regs *regs = (struct pt_regs *) (sw + 1); - unsigned long usp = rdusp(); - struct sigframe __user *frame = (struct sigframe __user *)(usp - 4); - sigset_t set; - - if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) - goto badframe; - if (__get_user(set.sig[0], &frame->sc.sc_mask) || - (_NSIG_WORDS > 1 && - __copy_from_user(&set.sig[1], &frame->extramask, - sizeof(frame->extramask)))) - goto badframe; - - sigdelsetmask(&set, ~_BLOCKABLE); - current->blocked = set; - recalc_sigpending(); - - if (restore_sigcontext(regs, &frame->sc, frame + 1)) - goto badframe; - return regs->d0; - -badframe: - force_sig(SIGSEGV, current); - return 0; -} - -asmlinkage int do_rt_sigreturn(unsigned long __unused) -{ - struct switch_stack *sw = (struct switch_stack *) &__unused; - struct pt_regs *regs = (struct pt_regs *) (sw + 1); - unsigned long usp = rdusp(); - struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4); - sigset_t set; - - if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) - goto badframe; - if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) - goto badframe; - - sigdelsetmask(&set, ~_BLOCKABLE); - current->blocked = set; - recalc_sigpending(); - - if (rt_restore_ucontext(regs, sw, &frame->uc)) - goto badframe; - return regs->d0; - -badframe: - force_sig(SIGSEGV, current); - return 0; -} - -/* - * Set up a signal frame. - */ - -static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs) -{ - if (FPU_IS_EMU) { - /* save registers */ - memcpy(sc->sc_fpcntl, current->thread.fpcntl, 12); - memcpy(sc->sc_fpregs, current->thread.fp, 24); - return; - } - - __asm__ volatile (".chip 68k/68881\n\t" - "fsave %0\n\t" - ".chip 68k" - : : "m" (*sc->sc_fpstate) : "memory"); - - if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) { - fpu_version = sc->sc_fpstate[0]; - if (CPU_IS_020_OR_030 && - regs->vector >= (VEC_FPBRUC * 4) && - regs->vector <= (VEC_FPNAN * 4)) { - /* Clear pending exception in 68882 idle frame */ - if (*(unsigned short *) sc->sc_fpstate == 0x1f38) - sc->sc_fpstate[0x38] |= 1 << 3; - } - __asm__ volatile (".chip 68k/68881\n\t" - "fmovemx %%fp0-%%fp1,%0\n\t" - "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t" - ".chip 68k" - : "=m" (*sc->sc_fpregs), - "=m" (*sc->sc_fpcntl) - : /* no inputs */ - : "memory"); - } -} - -static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs) -{ - unsigned char fpstate[FPCONTEXT_SIZE]; - int context_size = CPU_IS_060 ? 8 : 0; - int err = 0; - - if (FPU_IS_EMU) { - /* save fpu control register */ - err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpcntl, - current->thread.fpcntl, 12); - /* save all other fpu register */ - err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpregs, - current->thread.fp, 96); - return err; - } - - __asm__ volatile (".chip 68k/68881\n\t" - "fsave %0\n\t" - ".chip 68k" - : : "m" (*fpstate) : "memory"); - - err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate); - if (CPU_IS_060 ? fpstate[2] : fpstate[0]) { - fpregset_t fpregs; - if (!CPU_IS_060) - context_size = fpstate[1]; - fpu_version = fpstate[0]; - if (CPU_IS_020_OR_030 && - regs->vector >= (VEC_FPBRUC * 4) && - regs->vector <= (VEC_FPNAN * 4)) { - /* Clear pending exception in 68882 idle frame */ - if (*(unsigned short *) fpstate == 0x1f38) - fpstate[0x38] |= 1 << 3; - } - __asm__ volatile (".chip 68k/68881\n\t" - "fmovemx %%fp0-%%fp7,%0\n\t" - "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t" - ".chip 68k" - : "=m" (*fpregs.f_fpregs), - "=m" (*fpregs.f_fpcntl) - : /* no inputs */ - : "memory"); - err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs, - sizeof(fpregs)); - } - if (context_size) - err |= copy_to_user((long __user *)&uc->uc_fpstate + 1, fpstate + 4, - context_size); - return err; -} - -static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs, - unsigned long mask) -{ - sc->sc_mask = mask; - sc->sc_usp = rdusp(); - sc->sc_d0 = regs->d0; - sc->sc_d1 = regs->d1; - sc->sc_a0 = regs->a0; - sc->sc_a1 = regs->a1; - sc->sc_sr = regs->sr; - sc->sc_pc = regs->pc; - sc->sc_formatvec = regs->format << 12 | regs->vector; - save_fpu_state(sc, regs); -} - -static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs) -{ - struct switch_stack *sw = (struct switch_stack *)regs - 1; - greg_t __user *gregs = uc->uc_mcontext.gregs; - int err = 0; - - err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version); - err |= __put_user(regs->d0, &gregs[0]); - err |= __put_user(regs->d1, &gregs[1]); - err |= __put_user(regs->d2, &gregs[2]); - err |= __put_user(regs->d3, &gregs[3]); - err |= __put_user(regs->d4, &gregs[4]); - err |= __put_user(regs->d5, &gregs[5]); - err |= __put_user(sw->d6, &gregs[6]); - err |= __put_user(sw->d7, &gregs[7]); - err |= __put_user(regs->a0, &gregs[8]); - err |= __put_user(regs->a1, &gregs[9]); - err |= __put_user(regs->a2, &gregs[10]); - err |= __put_user(sw->a3, &gregs[11]); - err |= __put_user(sw->a4, &gregs[12]); - err |= __put_user(sw->a5, &gregs[13]); - err |= __put_user(sw->a6, &gregs[14]); - err |= __put_user(rdusp(), &gregs[15]); - err |= __put_user(regs->pc, &gregs[16]); - err |= __put_user(regs->sr, &gregs[17]); - err |= __put_user((regs->format << 12) | regs->vector, &uc->uc_formatvec); - err |= rt_save_fpu_state(uc, regs); - return err; -} - -static inline void push_cache (unsigned long vaddr) -{ - /* - * Using the old cache_push_v() was really a big waste. - * - * What we are trying to do is to flush 8 bytes to ram. - * Flushing 2 cache lines of 16 bytes is much cheaper than - * flushing 1 or 2 pages, as previously done in - * cache_push_v(). - * Jes - */ - if (CPU_IS_040) { - unsigned long temp; - - __asm__ __volatile__ (".chip 68040\n\t" - "nop\n\t" - "ptestr (%1)\n\t" - "movec %%mmusr,%0\n\t" - ".chip 68k" - : "=r" (temp) - : "a" (vaddr)); - - temp &= PAGE_MASK; - temp |= vaddr & ~PAGE_MASK; - - __asm__ __volatile__ (".chip 68040\n\t" - "nop\n\t" - "cpushl %%bc,(%0)\n\t" - ".chip 68k" - : : "a" (temp)); - } - else if (CPU_IS_060) { - unsigned long temp; - __asm__ __volatile__ (".chip 68060\n\t" - "plpar (%0)\n\t" - ".chip 68k" - : "=a" (temp) - : "0" (vaddr)); - __asm__ __volatile__ (".chip 68060\n\t" - "cpushl %%bc,(%0)\n\t" - ".chip 68k" - : : "a" (temp)); - } - else { - /* - * 68030/68020 have no writeback cache; - * still need to clear icache. - * Note that vaddr is guaranteed to be long word aligned. - */ - unsigned long temp; - asm volatile ("movec %%cacr,%0" : "=r" (temp)); - temp += 4; - asm volatile ("movec %0,%%caar\n\t" - "movec %1,%%cacr" - : : "r" (vaddr), "r" (temp)); - asm volatile ("movec %0,%%caar\n\t" - "movec %1,%%cacr" - : : "r" (vaddr + 4), "r" (temp)); - } -} - -static inline void __user * -get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size) -{ - unsigned long usp; - - /* Default to using normal stack. */ - usp = rdusp(); - - /* This is the X/Open sanctioned signal stack switching. */ - if (ka->sa.sa_flags & SA_ONSTACK) { - if (!sas_ss_flags(usp)) - usp = current->sas_ss_sp + current->sas_ss_size; - } - return (void __user *)((usp - frame_size) & -8UL); -} - -static int setup_frame (int sig, struct k_sigaction *ka, - sigset_t *set, struct pt_regs *regs) -{ - struct sigframe __user *frame; - int fsize = frame_extra_sizes[regs->format]; - struct sigcontext context; - int err = 0; - - if (fsize < 0) { -#ifdef DEBUG - printk ("setup_frame: Unknown frame format %#x\n", - regs->format); -#endif - goto give_sigsegv; - } - - frame = get_sigframe(ka, regs, sizeof(*frame) + fsize); - - if (fsize) - err |= copy_to_user (frame + 1, regs + 1, fsize); - - err |= __put_user((current_thread_info()->exec_domain - && current_thread_info()->exec_domain->signal_invmap - && sig < 32 - ? current_thread_info()->exec_domain->signal_invmap[sig] - : sig), - &frame->sig); - - err |= __put_user(regs->vector, &frame->code); - err |= __put_user(&frame->sc, &frame->psc); - - if (_NSIG_WORDS > 1) - err |= copy_to_user(frame->extramask, &set->sig[1], - sizeof(frame->extramask)); - - setup_sigcontext(&context, regs, set->sig[0]); - err |= copy_to_user (&frame->sc, &context, sizeof(context)); - - /* Set up to return from userspace. */ - err |= __put_user(frame->retcode, &frame->pretcode); - /* moveq #,d0; trap #0 */ - err |= __put_user(0x70004e40 + (__NR_sigreturn << 16), - (long __user *)(frame->retcode)); - - if (err) - goto give_sigsegv; - - push_cache ((unsigned long) &frame->retcode); - - /* - * Set up registers for signal handler. All the state we are about - * to destroy is successfully copied to sigframe. - */ - wrusp ((unsigned long) frame); - regs->pc = (unsigned long) ka->sa.sa_handler; - - /* - * This is subtle; if we build more than one sigframe, all but the - * first one will see frame format 0 and have fsize == 0, so we won't - * screw stkadj. - */ - if (fsize) - regs->stkadj = fsize; - - /* Prepare to skip over the extra stuff in the exception frame. */ - if (regs->stkadj) { - struct pt_regs *tregs = - (struct pt_regs *)((ulong)regs + regs->stkadj); -#ifdef DEBUG - printk("Performing stackadjust=%04x\n", regs->stkadj); -#endif - /* This must be copied with decreasing addresses to - handle overlaps. */ - tregs->vector = 0; - tregs->format = 0; - tregs->pc = regs->pc; - tregs->sr = regs->sr; - } - return 0; - -give_sigsegv: - force_sigsegv(sig, current); - return err; -} - -static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs *regs) -{ - struct rt_sigframe __user *frame; - int fsize = frame_extra_sizes[regs->format]; - int err = 0; - - if (fsize < 0) { -#ifdef DEBUG - printk ("setup_frame: Unknown frame format %#x\n", - regs->format); -#endif - goto give_sigsegv; - } - - frame = get_sigframe(ka, regs, sizeof(*frame)); - - if (fsize) - err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize); - - err |= __put_user((current_thread_info()->exec_domain - && current_thread_info()->exec_domain->signal_invmap - && sig < 32 - ? current_thread_info()->exec_domain->signal_invmap[sig] - : sig), - &frame->sig); - err |= __put_user(&frame->info, &frame->pinfo); - err |= __put_user(&frame->uc, &frame->puc); - err |= copy_siginfo_to_user(&frame->info, info); - - /* Create the ucontext. */ - err |= __put_user(0, &frame->uc.uc_flags); - err |= __put_user(NULL, &frame->uc.uc_link); - err |= __put_user((void __user *)current->sas_ss_sp, - &frame->uc.uc_stack.ss_sp); - err |= __put_user(sas_ss_flags(rdusp()), - &frame->uc.uc_stack.ss_flags); - err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); - err |= rt_setup_ucontext(&frame->uc, regs); - err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set)); - - /* Set up to return from userspace. */ - err |= __put_user(frame->retcode, &frame->pretcode); -#ifdef __mcoldfire__ - /* movel #__NR_rt_sigreturn,d0; trap #0 */ - err |= __put_user(0x203c0000, (long __user *)(frame->retcode + 0)); - err |= __put_user(0x00004e40 + (__NR_rt_sigreturn << 16), - (long __user *)(frame->retcode + 4)); +#ifdef CONFIG_MMU +#include "signal_mm.c" #else - /* moveq #,d0; notb d0; trap #0 */ - err |= __put_user(0x70004600 + ((__NR_rt_sigreturn ^ 0xff) << 16), - (long __user *)(frame->retcode + 0)); - err |= __put_user(0x4e40, (short __user *)(frame->retcode + 4)); -#endif - - if (err) - goto give_sigsegv; - - push_cache ((unsigned long) &frame->retcode); - - /* - * Set up registers for signal handler. All the state we are about - * to destroy is successfully copied to sigframe. - */ - wrusp ((unsigned long) frame); - regs->pc = (unsigned long) ka->sa.sa_handler; - - /* - * This is subtle; if we build more than one sigframe, all but the - * first one will see frame format 0 and have fsize == 0, so we won't - * screw stkadj. - */ - if (fsize) - regs->stkadj = fsize; - - /* Prepare to skip over the extra stuff in the exception frame. */ - if (regs->stkadj) { - struct pt_regs *tregs = - (struct pt_regs *)((ulong)regs + regs->stkadj); -#ifdef DEBUG - printk("Performing stackadjust=%04x\n", regs->stkadj); +#include "signal_no.c" #endif - /* This must be copied with decreasing addresses to - handle overlaps. */ - tregs->vector = 0; - tregs->format = 0; - tregs->pc = regs->pc; - tregs->sr = regs->sr; - } - return 0; - -give_sigsegv: - force_sigsegv(sig, current); - return err; -} - -static inline void -handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler) -{ - switch (regs->d0) { - case -ERESTARTNOHAND: - if (!has_handler) - goto do_restart; - regs->d0 = -EINTR; - break; - - case -ERESTART_RESTARTBLOCK: - if (!has_handler) { - regs->d0 = __NR_restart_syscall; - regs->pc -= 2; - break; - } - regs->d0 = -EINTR; - break; - - case -ERESTARTSYS: - if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) { - regs->d0 = -EINTR; - break; - } - /* fallthrough */ - case -ERESTARTNOINTR: - do_restart: - regs->d0 = regs->orig_d0; - regs->pc -= 2; - break; - } -} - -void ptrace_signal_deliver(struct pt_regs *regs, void *cookie) -{ - if (regs->orig_d0 < 0) - return; - switch (regs->d0) { - case -ERESTARTNOHAND: - case -ERESTARTSYS: - case -ERESTARTNOINTR: - regs->d0 = regs->orig_d0; - regs->orig_d0 = -1; - regs->pc -= 2; - break; - } -} - -/* - * OK, we're invoking a handler - */ -static void -handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info, - sigset_t *oldset, struct pt_regs *regs) -{ - int err; - /* are we from a system call? */ - if (regs->orig_d0 >= 0) - /* If so, check system call restarting.. */ - handle_restart(regs, ka, 1); - - /* set up the stack frame */ - if (ka->sa.sa_flags & SA_SIGINFO) - err = setup_rt_frame(sig, ka, info, oldset, regs); - else - err = setup_frame(sig, ka, oldset, regs); - - if (err) - return; - - sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); - if (!(ka->sa.sa_flags & SA_NODEFER)) - sigaddset(¤t->blocked,sig); - recalc_sigpending(); - - if (test_thread_flag(TIF_DELAYED_TRACE)) { - regs->sr &= ~0x8000; - send_sig(SIGTRAP, current, 1); - } - - clear_thread_flag(TIF_RESTORE_SIGMASK); -} - -/* - * Note that 'init' is a special process: it doesn't get signals it doesn't - * want to handle. Thus you cannot kill init even with a SIGKILL even by - * mistake. - */ -asmlinkage void do_signal(struct pt_regs *regs) -{ - siginfo_t info; - struct k_sigaction ka; - int signr; - sigset_t *oldset; - - current->thread.esp0 = (unsigned long) regs; - - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - oldset = ¤t->saved_sigmask; - else - oldset = ¤t->blocked; - - signr = get_signal_to_deliver(&info, &ka, regs, NULL); - if (signr > 0) { - /* Whee! Actually deliver the signal. */ - handle_signal(signr, &ka, &info, oldset, regs); - return; - } - - /* Did we come from a system call? */ - if (regs->orig_d0 >= 0) - /* Restart the system call - no handlers present */ - handle_restart(regs, NULL, 0); - - /* If there's no signal to deliver, we just restore the saved mask. */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) { - clear_thread_flag(TIF_RESTORE_SIGMASK); - sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); - } -} diff --git a/arch/m68k/kernel/signal_mm.c b/arch/m68k/kernel/signal_mm.c new file mode 100644 index 0000000..a0afc23 --- /dev/null +++ b/arch/m68k/kernel/signal_mm.c @@ -0,0 +1,1017 @@ +/* + * linux/arch/m68k/kernel/signal.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +/* + * Linux/m68k support by Hamish Macdonald + * + * 68060 fixes by Jesper Skov + * + * 1997-12-01 Modified for POSIX.1b signals by Andreas Schwab + * + * mathemu support by Roman Zippel + * (Note: fpstate in the signal context is completely ignored for the emulator + * and the internal floating point format is put on stack) + */ + +/* + * ++roman (07/09/96): implemented signal stacks (specially for tosemu on + * Atari :-) Current limitation: Only one sigstack can be active at one time. + * If a second signal with SA_ONSTACK set arrives while working on a sigstack, + * SA_ONSTACK is ignored. This behaviour avoids lots of trouble with nested + * signal handlers! + */ + +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/kernel.h> +#include <linux/signal.h> +#include <linux/syscalls.h> +#include <linux/errno.h> +#include <linux/wait.h> +#include <linux/ptrace.h> +#include <linux/unistd.h> +#include <linux/stddef.h> +#include <linux/highuid.h> +#include <linux/personality.h> +#include <linux/tty.h> +#include <linux/binfmts.h> +#include <linux/module.h> + +#include <asm/setup.h> +#include <asm/uaccess.h> +#include <asm/pgtable.h> +#include <asm/traps.h> +#include <asm/ucontext.h> + +#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) + +static const int frame_extra_sizes[16] = { + [1] = -1, /* sizeof(((struct frame *)0)->un.fmt1), */ + [2] = sizeof(((struct frame *)0)->un.fmt2), + [3] = sizeof(((struct frame *)0)->un.fmt3), + [4] = sizeof(((struct frame *)0)->un.fmt4), + [5] = -1, /* sizeof(((struct frame *)0)->un.fmt5), */ + [6] = -1, /* sizeof(((struct frame *)0)->un.fmt6), */ + [7] = sizeof(((struct frame *)0)->un.fmt7), + [8] = -1, /* sizeof(((struct frame *)0)->un.fmt8), */ + [9] = sizeof(((struct frame *)0)->un.fmt9), + [10] = sizeof(((struct frame *)0)->un.fmta), + [11] = sizeof(((struct frame *)0)->un.fmtb), + [12] = -1, /* sizeof(((struct frame *)0)->un.fmtc), */ + [13] = -1, /* sizeof(((struct frame *)0)->un.fmtd), */ + [14] = -1, /* sizeof(((struct frame *)0)->un.fmte), */ + [15] = -1, /* sizeof(((struct frame *)0)->un.fmtf), */ +}; + +int handle_kernel_fault(struct pt_regs *regs) +{ + const struct exception_table_entry *fixup; + struct pt_regs *tregs; + + /* Are we prepared to handle this kernel fault? */ + fixup = search_exception_tables(regs->pc); + if (!fixup) + return 0; + + /* Create a new four word stack frame, discarding the old one. */ + regs->stkadj = frame_extra_sizes[regs->format]; + tregs = (struct pt_regs *)((long)regs + regs->stkadj); + tregs->vector = regs->vector; + tregs->format = 0; + tregs->pc = fixup->fixup; + tregs->sr = regs->sr; + + return 1; +} + +/* + * Atomically swap in the new signal mask, and wait for a signal. + */ +asmlinkage int +sys_sigsuspend(int unused0, int unused1, old_sigset_t mask) +{ + mask &= _BLOCKABLE; + spin_lock_irq(¤t->sighand->siglock); + current->saved_sigmask = current->blocked; + siginitset(¤t->blocked, mask); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + current->state = TASK_INTERRUPTIBLE; + schedule(); + set_restore_sigmask(); + + return -ERESTARTNOHAND; +} + +asmlinkage int +sys_sigaction(int sig, const struct old_sigaction __user *act, + struct old_sigaction __user *oact) +{ + struct k_sigaction new_ka, old_ka; + int ret; + + if (act) { + old_sigset_t mask; + if (!access_ok(VERIFY_READ, act, sizeof(*act)) || + __get_user(new_ka.sa.sa_handler, &act->sa_handler) || + __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) || + __get_user(new_ka.sa.sa_flags, &act->sa_flags) || + __get_user(mask, &act->sa_mask)) + return -EFAULT; + siginitset(&new_ka.sa.sa_mask, mask); + } + + ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); + + if (!ret && oact) { + if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || + __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || + __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) || + __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) + return -EFAULT; + } + + return ret; +} + +asmlinkage int +sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss) +{ + return do_sigaltstack(uss, uoss, rdusp()); +} + + +/* + * Do a signal return; undo the signal stack. + * + * Keep the return code on the stack quadword aligned! + * That makes the cache flush below easier. + */ + +struct sigframe +{ + char __user *pretcode; + int sig; + int code; + struct sigcontext __user *psc; + char retcode[8]; + unsigned long extramask[_NSIG_WORDS-1]; + struct sigcontext sc; +}; + +struct rt_sigframe +{ + char __user *pretcode; + int sig; + struct siginfo __user *pinfo; + void __user *puc; + char retcode[8]; + struct siginfo info; + struct ucontext uc; +}; + + +static unsigned char fpu_version; /* version number of fpu, set by setup_frame */ + +static inline int restore_fpu_state(struct sigcontext *sc) +{ + int err = 1; + + if (FPU_IS_EMU) { + /* restore registers */ + memcpy(current->thread.fpcntl, sc->sc_fpcntl, 12); + memcpy(current->thread.fp, sc->sc_fpregs, 24); + return 0; + } + + if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) { + /* Verify the frame format. */ + if (!CPU_IS_060 && (sc->sc_fpstate[0] != fpu_version)) + goto out; + if (CPU_IS_020_OR_030) { + if (m68k_fputype & FPU_68881 && + !(sc->sc_fpstate[1] == 0x18 || sc->sc_fpstate[1] == 0xb4)) + goto out; + if (m68k_fputype & FPU_68882 && + !(sc->sc_fpstate[1] == 0x38 || sc->sc_fpstate[1] == 0xd4)) + goto out; + } else if (CPU_IS_040) { + if (!(sc->sc_fpstate[1] == 0x00 || + sc->sc_fpstate[1] == 0x28 || + sc->sc_fpstate[1] == 0x60)) + goto out; + } else if (CPU_IS_060) { + if (!(sc->sc_fpstate[3] == 0x00 || + sc->sc_fpstate[3] == 0x60 || + sc->sc_fpstate[3] == 0xe0)) + goto out; + } else + goto out; + + __asm__ volatile (".chip 68k/68881\n\t" + "fmovemx %0,%%fp0-%%fp1\n\t" + "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t" + ".chip 68k" + : /* no outputs */ + : "m" (*sc->sc_fpregs), "m" (*sc->sc_fpcntl)); + } + __asm__ volatile (".chip 68k/68881\n\t" + "frestore %0\n\t" + ".chip 68k" : : "m" (*sc->sc_fpstate)); + err = 0; + +out: + return err; +} + +#define FPCONTEXT_SIZE 216 +#define uc_fpstate uc_filler[0] +#define uc_formatvec uc_filler[FPCONTEXT_SIZE/4] +#define uc_extra uc_filler[FPCONTEXT_SIZE/4+1] + +static inline int rt_restore_fpu_state(struct ucontext __user *uc) +{ + unsigned char fpstate[FPCONTEXT_SIZE]; + int context_size = CPU_IS_060 ? 8 : 0; + fpregset_t fpregs; + int err = 1; + + if (FPU_IS_EMU) { + /* restore fpu control register */ + if (__copy_from_user(current->thread.fpcntl, + uc->uc_mcontext.fpregs.f_fpcntl, 12)) + goto out; + /* restore all other fpu register */ + if (__copy_from_user(current->thread.fp, + uc->uc_mcontext.fpregs.f_fpregs, 96)) + goto out; + return 0; + } + + if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate)) + goto out; + if (CPU_IS_060 ? fpstate[2] : fpstate[0]) { + if (!CPU_IS_060) + context_size = fpstate[1]; + /* Verify the frame format. */ + if (!CPU_IS_060 && (fpstate[0] != fpu_version)) + goto out; + if (CPU_IS_020_OR_030) { + if (m68k_fputype & FPU_68881 && + !(context_size == 0x18 || context_size == 0xb4)) + goto out; + if (m68k_fputype & FPU_68882 && + !(context_size == 0x38 || context_size == 0xd4)) + goto out; + } else if (CPU_IS_040) { + if (!(context_size == 0x00 || + context_size == 0x28 || + context_size == 0x60)) + goto out; + } else if (CPU_IS_060) { + if (!(fpstate[3] == 0x00 || + fpstate[3] == 0x60 || + fpstate[3] == 0xe0)) + goto out; + } else + goto out; + if (__copy_from_user(&fpregs, &uc->uc_mcontext.fpregs, + sizeof(fpregs))) + goto out; + __asm__ volatile (".chip 68k/68881\n\t" + "fmovemx %0,%%fp0-%%fp7\n\t" + "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t" + ".chip 68k" + : /* no outputs */ + : "m" (*fpregs.f_fpregs), + "m" (*fpregs.f_fpcntl)); + } + if (context_size && + __copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1, + context_size)) + goto out; + __asm__ volatile (".chip 68k/68881\n\t" + "frestore %0\n\t" + ".chip 68k" : : "m" (*fpstate)); + err = 0; + +out: + return err; +} + +static int mangle_kernel_stack(struct pt_regs *regs, int formatvec, + void __user *fp) +{ + int fsize = frame_extra_sizes[formatvec >> 12]; + if (fsize < 0) { + /* + * user process trying to return with weird frame format + */ +#ifdef DEBUG + printk("user process returning with weird frame format\n"); +#endif + return 1; + } + if (!fsize) { + regs->format = formatvec >> 12; + regs->vector = formatvec & 0xfff; + } else { + struct switch_stack *sw = (struct switch_stack *)regs - 1; + unsigned long buf[fsize / 2]; /* yes, twice as much */ + + /* that'll make sure that expansion won't crap over data */ + if (copy_from_user(buf + fsize / 4, fp, fsize)) + return 1; + + /* point of no return */ + regs->format = formatvec >> 12; + regs->vector = formatvec & 0xfff; +#define frame_offset (sizeof(struct pt_regs)+sizeof(struct switch_stack)) + __asm__ __volatile__ + (" movel %0,%/a0\n\t" + " subl %1,%/a0\n\t" /* make room on stack */ + " movel %/a0,%/sp\n\t" /* set stack pointer */ + /* move switch_stack and pt_regs */ + "1: movel %0@+,%/a0@+\n\t" + " dbra %2,1b\n\t" + " lea %/sp@(%c3),%/a0\n\t" /* add offset of fmt */ + " lsrl #2,%1\n\t" + " subql #1,%1\n\t" + /* copy to the gap we'd made */ + "2: movel %4@+,%/a0@+\n\t" + " dbra %1,2b\n\t" + " bral ret_from_signal\n" + : /* no outputs, it doesn't ever return */ + : "a" (sw), "d" (fsize), "d" (frame_offset/4-1), + "n" (frame_offset), "a" (buf + fsize/4) + : "a0"); +#undef frame_offset + } + return 0; +} + +static inline int +restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __user *fp) +{ + int formatvec; + struct sigcontext context; + int err; + + /* Always make any pending restarted system calls return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + + /* get previous context */ + if (copy_from_user(&context, usc, sizeof(context))) + goto badframe; + + /* restore passed registers */ + regs->d0 = context.sc_d0; + regs->d1 = context.sc_d1; + regs->a0 = context.sc_a0; + regs->a1 = context.sc_a1; + regs->sr = (regs->sr & 0xff00) | (context.sc_sr & 0xff); + regs->pc = context.sc_pc; + regs->orig_d0 = -1; /* disable syscall checks */ + wrusp(context.sc_usp); + formatvec = context.sc_formatvec; + + err = restore_fpu_state(&context); + + if (err || mangle_kernel_stack(regs, formatvec, fp)) + goto badframe; + + return 0; + +badframe: + return 1; +} + +static inline int +rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw, + struct ucontext __user *uc) +{ + int temp; + greg_t __user *gregs = uc->uc_mcontext.gregs; + unsigned long usp; + int err; + + /* Always make any pending restarted system calls return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + + err = __get_user(temp, &uc->uc_mcontext.version); + if (temp != MCONTEXT_VERSION) + goto badframe; + /* restore passed registers */ + err |= __get_user(regs->d0, &gregs[0]); + err |= __get_user(regs->d1, &gregs[1]); + err |= __get_user(regs->d2, &gregs[2]); + err |= __get_user(regs->d3, &gregs[3]); + err |= __get_user(regs->d4, &gregs[4]); + err |= __get_user(regs->d5, &gregs[5]); + err |= __get_user(sw->d6, &gregs[6]); + err |= __get_user(sw->d7, &gregs[7]); + err |= __get_user(regs->a0, &gregs[8]); + err |= __get_user(regs->a1, &gregs[9]); + err |= __get_user(regs->a2, &gregs[10]); + err |= __get_user(sw->a3, &gregs[11]); + err |= __get_user(sw->a4, &gregs[12]); + err |= __get_user(sw->a5, &gregs[13]); + err |= __get_user(sw->a6, &gregs[14]); + err |= __get_user(usp, &gregs[15]); + wrusp(usp); + err |= __get_user(regs->pc, &gregs[16]); + err |= __get_user(temp, &gregs[17]); + regs->sr = (regs->sr & 0xff00) | (temp & 0xff); + regs->orig_d0 = -1; /* disable syscall checks */ + err |= __get_user(temp, &uc->uc_formatvec); + + err |= rt_restore_fpu_state(uc); + + if (err || do_sigaltstack(&uc->uc_stack, NULL, usp) == -EFAULT) + goto badframe; + + if (mangle_kernel_stack(regs, temp, &uc->uc_extra)) + goto badframe; + + return 0; + +badframe: + return 1; +} + +asmlinkage int do_sigreturn(unsigned long __unused) +{ + struct switch_stack *sw = (struct switch_stack *) &__unused; + struct pt_regs *regs = (struct pt_regs *) (sw + 1); + unsigned long usp = rdusp(); + struct sigframe __user *frame = (struct sigframe __user *)(usp - 4); + sigset_t set; + + if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) + goto badframe; + if (__get_user(set.sig[0], &frame->sc.sc_mask) || + (_NSIG_WORDS > 1 && + __copy_from_user(&set.sig[1], &frame->extramask, + sizeof(frame->extramask)))) + goto badframe; + + sigdelsetmask(&set, ~_BLOCKABLE); + current->blocked = set; + recalc_sigpending(); + + if (restore_sigcontext(regs, &frame->sc, frame + 1)) + goto badframe; + return regs->d0; + +badframe: + force_sig(SIGSEGV, current); + return 0; +} + +asmlinkage int do_rt_sigreturn(unsigned long __unused) +{ + struct switch_stack *sw = (struct switch_stack *) &__unused; + struct pt_regs *regs = (struct pt_regs *) (sw + 1); + unsigned long usp = rdusp(); + struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4); + sigset_t set; + + if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) + goto badframe; + if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) + goto badframe; + + sigdelsetmask(&set, ~_BLOCKABLE); + current->blocked = set; + recalc_sigpending(); + + if (rt_restore_ucontext(regs, sw, &frame->uc)) + goto badframe; + return regs->d0; + +badframe: + force_sig(SIGSEGV, current); + return 0; +} + +/* + * Set up a signal frame. + */ + +static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs) +{ + if (FPU_IS_EMU) { + /* save registers */ + memcpy(sc->sc_fpcntl, current->thread.fpcntl, 12); + memcpy(sc->sc_fpregs, current->thread.fp, 24); + return; + } + + __asm__ volatile (".chip 68k/68881\n\t" + "fsave %0\n\t" + ".chip 68k" + : : "m" (*sc->sc_fpstate) : "memory"); + + if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) { + fpu_version = sc->sc_fpstate[0]; + if (CPU_IS_020_OR_030 && + regs->vector >= (VEC_FPBRUC * 4) && + regs->vector <= (VEC_FPNAN * 4)) { + /* Clear pending exception in 68882 idle frame */ + if (*(unsigned short *) sc->sc_fpstate == 0x1f38) + sc->sc_fpstate[0x38] |= 1 << 3; + } + __asm__ volatile (".chip 68k/68881\n\t" + "fmovemx %%fp0-%%fp1,%0\n\t" + "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t" + ".chip 68k" + : "=m" (*sc->sc_fpregs), + "=m" (*sc->sc_fpcntl) + : /* no inputs */ + : "memory"); + } +} + +static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs) +{ + unsigned char fpstate[FPCONTEXT_SIZE]; + int context_size = CPU_IS_060 ? 8 : 0; + int err = 0; + + if (FPU_IS_EMU) { + /* save fpu control register */ + err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpcntl, + current->thread.fpcntl, 12); + /* save all other fpu register */ + err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpregs, + current->thread.fp, 96); + return err; + } + + __asm__ volatile (".chip 68k/68881\n\t" + "fsave %0\n\t" + ".chip 68k" + : : "m" (*fpstate) : "memory"); + + err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate); + if (CPU_IS_060 ? fpstate[2] : fpstate[0]) { + fpregset_t fpregs; + if (!CPU_IS_060) + context_size = fpstate[1]; + fpu_version = fpstate[0]; + if (CPU_IS_020_OR_030 && + regs->vector >= (VEC_FPBRUC * 4) && + regs->vector <= (VEC_FPNAN * 4)) { + /* Clear pending exception in 68882 idle frame */ + if (*(unsigned short *) fpstate == 0x1f38) + fpstate[0x38] |= 1 << 3; + } + __asm__ volatile (".chip 68k/68881\n\t" + "fmovemx %%fp0-%%fp7,%0\n\t" + "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t" + ".chip 68k" + : "=m" (*fpregs.f_fpregs), + "=m" (*fpregs.f_fpcntl) + : /* no inputs */ + : "memory"); + err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs, + sizeof(fpregs)); + } + if (context_size) + err |= copy_to_user((long __user *)&uc->uc_fpstate + 1, fpstate + 4, + context_size); + return err; +} + +static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs, + unsigned long mask) +{ + sc->sc_mask = mask; + sc->sc_usp = rdusp(); + sc->sc_d0 = regs->d0; + sc->sc_d1 = regs->d1; + sc->sc_a0 = regs->a0; + sc->sc_a1 = regs->a1; + sc->sc_sr = regs->sr; + sc->sc_pc = regs->pc; + sc->sc_formatvec = regs->format << 12 | regs->vector; + save_fpu_state(sc, regs); +} + +static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs) +{ + struct switch_stack *sw = (struct switch_stack *)regs - 1; + greg_t __user *gregs = uc->uc_mcontext.gregs; + int err = 0; + + err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version); + err |= __put_user(regs->d0, &gregs[0]); + err |= __put_user(regs->d1, &gregs[1]); + err |= __put_user(regs->d2, &gregs[2]); + err |= __put_user(regs->d3, &gregs[3]); + err |= __put_user(regs->d4, &gregs[4]); + err |= __put_user(regs->d5, &gregs[5]); + err |= __put_user(sw->d6, &gregs[6]); + err |= __put_user(sw->d7, &gregs[7]); + err |= __put_user(regs->a0, &gregs[8]); + err |= __put_user(regs->a1, &gregs[9]); + err |= __put_user(regs->a2, &gregs[10]); + err |= __put_user(sw->a3, &gregs[11]); + err |= __put_user(sw->a4, &gregs[12]); + err |= __put_user(sw->a5, &gregs[13]); + err |= __put_user(sw->a6, &gregs[14]); + err |= __put_user(rdusp(), &gregs[15]); + err |= __put_user(regs->pc, &gregs[16]); + err |= __put_user(regs->sr, &gregs[17]); + err |= __put_user((regs->format << 12) | regs->vector, &uc->uc_formatvec); + err |= rt_save_fpu_state(uc, regs); + return err; +} + +static inline void push_cache (unsigned long vaddr) +{ + /* + * Using the old cache_push_v() was really a big waste. + * + * What we are trying to do is to flush 8 bytes to ram. + * Flushing 2 cache lines of 16 bytes is much cheaper than + * flushing 1 or 2 pages, as previously done in + * cache_push_v(). + * Jes + */ + if (CPU_IS_040) { + unsigned long temp; + + __asm__ __volatile__ (".chip 68040\n\t" + "nop\n\t" + "ptestr (%1)\n\t" + "movec %%mmusr,%0\n\t" + ".chip 68k" + : "=r" (temp) + : "a" (vaddr)); + + temp &= PAGE_MASK; + temp |= vaddr & ~PAGE_MASK; + + __asm__ __volatile__ (".chip 68040\n\t" + "nop\n\t" + "cpushl %%bc,(%0)\n\t" + ".chip 68k" + : : "a" (temp)); + } + else if (CPU_IS_060) { + unsigned long temp; + __asm__ __volatile__ (".chip 68060\n\t" + "plpar (%0)\n\t" + ".chip 68k" + : "=a" (temp) + : "0" (vaddr)); + __asm__ __volatile__ (".chip 68060\n\t" + "cpushl %%bc,(%0)\n\t" + ".chip 68k" + : : "a" (temp)); + } + else { + /* + * 68030/68020 have no writeback cache; + * still need to clear icache. + * Note that vaddr is guaranteed to be long word aligned. + */ + unsigned long temp; + asm volatile ("movec %%cacr,%0" : "=r" (temp)); + temp += 4; + asm volatile ("movec %0,%%caar\n\t" + "movec %1,%%cacr" + : : "r" (vaddr), "r" (temp)); + asm volatile ("movec %0,%%caar\n\t" + "movec %1,%%cacr" + : : "r" (vaddr + 4), "r" (temp)); + } +} + +static inline void __user * +get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size) +{ + unsigned long usp; + + /* Default to using normal stack. */ + usp = rdusp(); + + /* This is the X/Open sanctioned signal stack switching. */ + if (ka->sa.sa_flags & SA_ONSTACK) { + if (!sas_ss_flags(usp)) + usp = current->sas_ss_sp + current->sas_ss_size; + } + return (void __user *)((usp - frame_size) & -8UL); +} + +static int setup_frame (int sig, struct k_sigaction *ka, + sigset_t *set, struct pt_regs *regs) +{ + struct sigframe __user *frame; + int fsize = frame_extra_sizes[regs->format]; + struct sigcontext context; + int err = 0; + + if (fsize < 0) { +#ifdef DEBUG + printk ("setup_frame: Unknown frame format %#x\n", + regs->format); +#endif + goto give_sigsegv; + } + + frame = get_sigframe(ka, regs, sizeof(*frame) + fsize); + + if (fsize) + err |= copy_to_user (frame + 1, regs + 1, fsize); + + err |= __put_user((current_thread_info()->exec_domain + && current_thread_info()->exec_domain->signal_invmap + && sig < 32 + ? current_thread_info()->exec_domain->signal_invmap[sig] + : sig), + &frame->sig); + + err |= __put_user(regs->vector, &frame->code); + err |= __put_user(&frame->sc, &frame->psc); + + if (_NSIG_WORDS > 1) + err |= copy_to_user(frame->extramask, &set->sig[1], + sizeof(frame->extramask)); + + setup_sigcontext(&context, regs, set->sig[0]); + err |= copy_to_user (&frame->sc, &context, sizeof(context)); + + /* Set up to return from userspace. */ + err |= __put_user(frame->retcode, &frame->pretcode); + /* moveq #,d0; trap #0 */ + err |= __put_user(0x70004e40 + (__NR_sigreturn << 16), + (long __user *)(frame->retcode)); + + if (err) + goto give_sigsegv; + + push_cache ((unsigned long) &frame->retcode); + + /* + * Set up registers for signal handler. All the state we are about + * to destroy is successfully copied to sigframe. + */ + wrusp ((unsigned long) frame); + regs->pc = (unsigned long) ka->sa.sa_handler; + + /* + * This is subtle; if we build more than one sigframe, all but the + * first one will see frame format 0 and have fsize == 0, so we won't + * screw stkadj. + */ + if (fsize) + regs->stkadj = fsize; + + /* Prepare to skip over the extra stuff in the exception frame. */ + if (regs->stkadj) { + struct pt_regs *tregs = + (struct pt_regs *)((ulong)regs + regs->stkadj); +#ifdef DEBUG + printk("Performing stackadjust=%04x\n", regs->stkadj); +#endif + /* This must be copied with decreasing addresses to + handle overlaps. */ + tregs->vector = 0; + tregs->format = 0; + tregs->pc = regs->pc; + tregs->sr = regs->sr; + } + return 0; + +give_sigsegv: + force_sigsegv(sig, current); + return err; +} + +static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info, + sigset_t *set, struct pt_regs *regs) +{ + struct rt_sigframe __user *frame; + int fsize = frame_extra_sizes[regs->format]; + int err = 0; + + if (fsize < 0) { +#ifdef DEBUG + printk ("setup_frame: Unknown frame format %#x\n", + regs->format); +#endif + goto give_sigsegv; + } + + frame = get_sigframe(ka, regs, sizeof(*frame)); + + if (fsize) + err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize); + + err |= __put_user((current_thread_info()->exec_domain + && current_thread_info()->exec_domain->signal_invmap + && sig < 32 + ? current_thread_info()->exec_domain->signal_invmap[sig] + : sig), + &frame->sig); + err |= __put_user(&frame->info, &frame->pinfo); + err |= __put_user(&frame->uc, &frame->puc); + err |= copy_siginfo_to_user(&frame->info, info); + + /* Create the ucontext. */ + err |= __put_user(0, &frame->uc.uc_flags); + err |= __put_user(NULL, &frame->uc.uc_link); + err |= __put_user((void __user *)current->sas_ss_sp, + &frame->uc.uc_stack.ss_sp); + err |= __put_user(sas_ss_flags(rdusp()), + &frame->uc.uc_stack.ss_flags); + err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); + err |= rt_setup_ucontext(&frame->uc, regs); + err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set)); + + /* Set up to return from userspace. */ + err |= __put_user(frame->retcode, &frame->pretcode); +#ifdef __mcoldfire__ + /* movel #__NR_rt_sigreturn,d0; trap #0 */ + err |= __put_user(0x203c0000, (long __user *)(frame->retcode + 0)); + err |= __put_user(0x00004e40 + (__NR_rt_sigreturn << 16), + (long __user *)(frame->retcode + 4)); +#else + /* moveq #,d0; notb d0; trap #0 */ + err |= __put_user(0x70004600 + ((__NR_rt_sigreturn ^ 0xff) << 16), + (long __user *)(frame->retcode + 0)); + err |= __put_user(0x4e40, (short __user *)(frame->retcode + 4)); +#endif + + if (err) + goto give_sigsegv; + + push_cache ((unsigned long) &frame->retcode); + + /* + * Set up registers for signal handler. All the state we are about + * to destroy is successfully copied to sigframe. + */ + wrusp ((unsigned long) frame); + regs->pc = (unsigned long) ka->sa.sa_handler; + + /* + * This is subtle; if we build more than one sigframe, all but the + * first one will see frame format 0 and have fsize == 0, so we won't + * screw stkadj. + */ + if (fsize) + regs->stkadj = fsize; + + /* Prepare to skip over the extra stuff in the exception frame. */ + if (regs->stkadj) { + struct pt_regs *tregs = + (struct pt_regs *)((ulong)regs + regs->stkadj); +#ifdef DEBUG + printk("Performing stackadjust=%04x\n", regs->stkadj); +#endif + /* This must be copied with decreasing addresses to + handle overlaps. */ + tregs->vector = 0; + tregs->format = 0; + tregs->pc = regs->pc; + tregs->sr = regs->sr; + } + return 0; + +give_sigsegv: + force_sigsegv(sig, current); + return err; +} + +static inline void +handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler) +{ + switch (regs->d0) { + case -ERESTARTNOHAND: + if (!has_handler) + goto do_restart; + regs->d0 = -EINTR; + break; + + case -ERESTART_RESTARTBLOCK: + if (!has_handler) { + regs->d0 = __NR_restart_syscall; + regs->pc -= 2; + break; + } + regs->d0 = -EINTR; + break; + + case -ERESTARTSYS: + if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) { + regs->d0 = -EINTR; + break; + } + /* fallthrough */ + case -ERESTARTNOINTR: + do_restart: + regs->d0 = regs->orig_d0; + regs->pc -= 2; + break; + } +} + +void ptrace_signal_deliver(struct pt_regs *regs, void *cookie) +{ + if (regs->orig_d0 < 0) + return; + switch (regs->d0) { + case -ERESTARTNOHAND: + case -ERESTARTSYS: + case -ERESTARTNOINTR: + regs->d0 = regs->orig_d0; + regs->orig_d0 = -1; + regs->pc -= 2; + break; + } +} + +/* + * OK, we're invoking a handler + */ +static void +handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info, + sigset_t *oldset, struct pt_regs *regs) +{ + int err; + /* are we from a system call? */ + if (regs->orig_d0 >= 0) + /* If so, check system call restarting.. */ + handle_restart(regs, ka, 1); + + /* set up the stack frame */ + if (ka->sa.sa_flags & SA_SIGINFO) + err = setup_rt_frame(sig, ka, info, oldset, regs); + else + err = setup_frame(sig, ka, oldset, regs); + + if (err) + return; + + sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); + if (!(ka->sa.sa_flags & SA_NODEFER)) + sigaddset(¤t->blocked,sig); + recalc_sigpending(); + + if (test_thread_flag(TIF_DELAYED_TRACE)) { + regs->sr &= ~0x8000; + send_sig(SIGTRAP, current, 1); + } + + clear_thread_flag(TIF_RESTORE_SIGMASK); +} + +/* + * Note that 'init' is a special process: it doesn't get signals it doesn't + * want to handle. Thus you cannot kill init even with a SIGKILL even by + * mistake. + */ +asmlinkage void do_signal(struct pt_regs *regs) +{ + siginfo_t info; + struct k_sigaction ka; + int signr; + sigset_t *oldset; + + current->thread.esp0 = (unsigned long) regs; + + if (test_thread_flag(TIF_RESTORE_SIGMASK)) + oldset = ¤t->saved_sigmask; + else + oldset = ¤t->blocked; + + signr = get_signal_to_deliver(&info, &ka, regs, NULL); + if (signr > 0) { + /* Whee! Actually deliver the signal. */ + handle_signal(signr, &ka, &info, oldset, regs); + return; + } + + /* Did we come from a system call? */ + if (regs->orig_d0 >= 0) + /* Restart the system call - no handlers present */ + handle_restart(regs, NULL, 0); + + /* If there's no signal to deliver, we just restore the saved mask. */ + if (test_thread_flag(TIF_RESTORE_SIGMASK)) { + clear_thread_flag(TIF_RESTORE_SIGMASK); + sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); + } +} diff --git a/arch/m68k/kernel/signal_no.c b/arch/m68k/kernel/signal_no.c new file mode 100644 index 0000000..36a81bb --- /dev/null +++ b/arch/m68k/kernel/signal_no.c @@ -0,0 +1,765 @@ +/* + * linux/arch/m68knommu/kernel/signal.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +/* + * Linux/m68k support by Hamish Macdonald + * + * 68060 fixes by Jesper Skov + * + * 1997-12-01 Modified for POSIX.1b signals by Andreas Schwab + * + * mathemu support by Roman Zippel + * (Note: fpstate in the signal context is completely ignored for the emulator + * and the internal floating point format is put on stack) + */ + +/* + * ++roman (07/09/96): implemented signal stacks (specially for tosemu on + * Atari :-) Current limitation: Only one sigstack can be active at one time. + * If a second signal with SA_ONSTACK set arrives while working on a sigstack, + * SA_ONSTACK is ignored. This behaviour avoids lots of trouble with nested + * signal handlers! + */ + +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/kernel.h> +#include <linux/signal.h> +#include <linux/syscalls.h> +#include <linux/errno.h> +#include <linux/wait.h> +#include <linux/ptrace.h> +#include <linux/unistd.h> +#include <linux/stddef.h> +#include <linux/highuid.h> +#include <linux/tty.h> +#include <linux/personality.h> +#include <linux/binfmts.h> + +#include <asm/setup.h> +#include <asm/uaccess.h> +#include <asm/pgtable.h> +#include <asm/traps.h> +#include <asm/ucontext.h> + +#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) + +void ret_from_user_signal(void); +void ret_from_user_rt_signal(void); + +/* + * Atomically swap in the new signal mask, and wait for a signal. + */ +asmlinkage int +sys_sigsuspend(int unused0, int unused1, old_sigset_t mask) +{ + mask &= _BLOCKABLE; + spin_lock_irq(¤t->sighand->siglock); + current->saved_sigmask = current->blocked; + siginitset(¤t->blocked, mask); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + current->state = TASK_INTERRUPTIBLE; + schedule(); + set_restore_sigmask(); + + return -ERESTARTNOHAND; +} + +asmlinkage int +sys_sigaction(int sig, const struct old_sigaction __user *act, + struct old_sigaction __user *oact) +{ + struct k_sigaction new_ka, old_ka; + int ret; + + if (act) { + old_sigset_t mask; + if (!access_ok(VERIFY_READ, act, sizeof(*act)) || + __get_user(new_ka.sa.sa_handler, &act->sa_handler) || + __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) || + __get_user(new_ka.sa.sa_flags, &act->sa_flags) || + __get_user(mask, &act->sa_mask)) + return -EFAULT; + siginitset(&new_ka.sa.sa_mask, mask); + } + + ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); + + if (!ret && oact) { + if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || + __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || + __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) || + __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) + return -EFAULT; + } + + return ret; +} + +asmlinkage int +sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss) +{ + return do_sigaltstack(uss, uoss, rdusp()); +} + + +/* + * Do a signal return; undo the signal stack. + * + * Keep the return code on the stack quadword aligned! + * That makes the cache flush below easier. + */ + +struct sigframe +{ + char __user *pretcode; + int sig; + int code; + struct sigcontext __user *psc; + char retcode[8]; + unsigned long extramask[_NSIG_WORDS-1]; + struct sigcontext sc; +}; + +struct rt_sigframe +{ + char __user *pretcode; + int sig; + struct siginfo __user *pinfo; + void __user *puc; + char retcode[8]; + struct siginfo info; + struct ucontext uc; +}; + +#ifdef CONFIG_FPU + +static unsigned char fpu_version = 0; /* version number of fpu, set by setup_frame */ + +static inline int restore_fpu_state(struct sigcontext *sc) +{ + int err = 1; + + if (FPU_IS_EMU) { + /* restore registers */ + memcpy(current->thread.fpcntl, sc->sc_fpcntl, 12); + memcpy(current->thread.fp, sc->sc_fpregs, 24); + return 0; + } + + if (sc->sc_fpstate[0]) { + /* Verify the frame format. */ + if (sc->sc_fpstate[0] != fpu_version) + goto out; + + __asm__ volatile (".chip 68k/68881\n\t" + "fmovemx %0,%%fp0-%%fp1\n\t" + "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t" + ".chip 68k" + : /* no outputs */ + : "m" (*sc->sc_fpregs), "m" (*sc->sc_fpcntl)); + } + __asm__ volatile (".chip 68k/68881\n\t" + "frestore %0\n\t" + ".chip 68k" : : "m" (*sc->sc_fpstate)); + err = 0; + +out: + return err; +} + +#define FPCONTEXT_SIZE 216 +#define uc_fpstate uc_filler[0] +#define uc_formatvec uc_filler[FPCONTEXT_SIZE/4] +#define uc_extra uc_filler[FPCONTEXT_SIZE/4+1] + +static inline int rt_restore_fpu_state(struct ucontext __user *uc) +{ + unsigned char fpstate[FPCONTEXT_SIZE]; + int context_size = 0; + fpregset_t fpregs; + int err = 1; + + if (FPU_IS_EMU) { + /* restore fpu control register */ + if (__copy_from_user(current->thread.fpcntl, + uc->uc_mcontext.fpregs.f_fpcntl, 12)) + goto out; + /* restore all other fpu register */ + if (__copy_from_user(current->thread.fp, + uc->uc_mcontext.fpregs.f_fpregs, 96)) + goto out; + return 0; + } + + if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate)) + goto out; + if (fpstate[0]) { + context_size = fpstate[1]; + + /* Verify the frame format. */ + if (fpstate[0] != fpu_version) + goto out; + if (__copy_from_user(&fpregs, &uc->uc_mcontext.fpregs, + sizeof(fpregs))) + goto out; + __asm__ volatile (".chip 68k/68881\n\t" + "fmovemx %0,%%fp0-%%fp7\n\t" + "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t" + ".chip 68k" + : /* no outputs */ + : "m" (*fpregs.f_fpregs), + "m" (*fpregs.f_fpcntl)); + } + if (context_size && + __copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1, + context_size)) + goto out; + __asm__ volatile (".chip 68k/68881\n\t" + "frestore %0\n\t" + ".chip 68k" : : "m" (*fpstate)); + err = 0; + +out: + return err; +} + +#endif + +static inline int +restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __user *fp, + int *pd0) +{ + int formatvec; + struct sigcontext context; + int err = 0; + + /* Always make any pending restarted system calls return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + + /* get previous context */ + if (copy_from_user(&context, usc, sizeof(context))) + goto badframe; + + /* restore passed registers */ + regs->d1 = context.sc_d1; + regs->a0 = context.sc_a0; + regs->a1 = context.sc_a1; + ((struct switch_stack *)regs - 1)->a5 = context.sc_a5; + regs->sr = (regs->sr & 0xff00) | (context.sc_sr & 0xff); + regs->pc = context.sc_pc; + regs->orig_d0 = -1; /* disable syscall checks */ + wrusp(context.sc_usp); + formatvec = context.sc_formatvec; + regs->format = formatvec >> 12; + regs->vector = formatvec & 0xfff; + +#ifdef CONFIG_FPU + err = restore_fpu_state(&context); +#endif + + *pd0 = context.sc_d0; + return err; + +badframe: + return 1; +} + +static inline int +rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw, + struct ucontext __user *uc, int *pd0) +{ + int temp; + greg_t __user *gregs = uc->uc_mcontext.gregs; + unsigned long usp; + int err; + + /* Always make any pending restarted system calls return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + + err = __get_user(temp, &uc->uc_mcontext.version); + if (temp != MCONTEXT_VERSION) + goto badframe; + /* restore passed registers */ + err |= __get_user(regs->d0, &gregs[0]); + err |= __get_user(regs->d1, &gregs[1]); + err |= __get_user(regs->d2, &gregs[2]); + err |= __get_user(regs->d3, &gregs[3]); + err |= __get_user(regs->d4, &gregs[4]); + err |= __get_user(regs->d5, &gregs[5]); + err |= __get_user(sw->d6, &gregs[6]); + err |= __get_user(sw->d7, &gregs[7]); + err |= __get_user(regs->a0, &gregs[8]); + err |= __get_user(regs->a1, &gregs[9]); + err |= __get_user(regs->a2, &gregs[10]); + err |= __get_user(sw->a3, &gregs[11]); + err |= __get_user(sw->a4, &gregs[12]); + err |= __get_user(sw->a5, &gregs[13]); + err |= __get_user(sw->a6, &gregs[14]); + err |= __get_user(usp, &gregs[15]); + wrusp(usp); + err |= __get_user(regs->pc, &gregs[16]); + err |= __get_user(temp, &gregs[17]); + regs->sr = (regs->sr & 0xff00) | (temp & 0xff); + regs->orig_d0 = -1; /* disable syscall checks */ + regs->format = temp >> 12; + regs->vector = temp & 0xfff; + + if (do_sigaltstack(&uc->uc_stack, NULL, usp) == -EFAULT) + goto badframe; + + *pd0 = regs->d0; + return err; + +badframe: + return 1; +} + +asmlinkage int do_sigreturn(unsigned long __unused) +{ + struct switch_stack *sw = (struct switch_stack *) &__unused; + struct pt_regs *regs = (struct pt_regs *) (sw + 1); + unsigned long usp = rdusp(); + struct sigframe __user *frame = (struct sigframe __user *)(usp - 4); + sigset_t set; + int d0; + + if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) + goto badframe; + if (__get_user(set.sig[0], &frame->sc.sc_mask) || + (_NSIG_WORDS > 1 && + __copy_from_user(&set.sig[1], &frame->extramask, + sizeof(frame->extramask)))) + goto badframe; + + sigdelsetmask(&set, ~_BLOCKABLE); + spin_lock_irq(¤t->sighand->siglock); + current->blocked = set; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + if (restore_sigcontext(regs, &frame->sc, frame + 1, &d0)) + goto badframe; + return d0; + +badframe: + force_sig(SIGSEGV, current); + return 0; +} + +asmlinkage int do_rt_sigreturn(unsigned long __unused) +{ + struct switch_stack *sw = (struct switch_stack *) &__unused; + struct pt_regs *regs = (struct pt_regs *) (sw + 1); + unsigned long usp = rdusp(); + struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4); + sigset_t set; + int d0; + + if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) + goto badframe; + if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) + goto badframe; + + sigdelsetmask(&set, ~_BLOCKABLE); + spin_lock_irq(¤t->sighand->siglock); + current->blocked = set; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + if (rt_restore_ucontext(regs, sw, &frame->uc, &d0)) + goto badframe; + return d0; + +badframe: + force_sig(SIGSEGV, current); + return 0; +} + +#ifdef CONFIG_FPU +/* + * Set up a signal frame. + */ + +static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs) +{ + if (FPU_IS_EMU) { + /* save registers */ + memcpy(sc->sc_fpcntl, current->thread.fpcntl, 12); + memcpy(sc->sc_fpregs, current->thread.fp, 24); + return; + } + + __asm__ volatile (".chip 68k/68881\n\t" + "fsave %0\n\t" + ".chip 68k" + : : "m" (*sc->sc_fpstate) : "memory"); + + if (sc->sc_fpstate[0]) { + fpu_version = sc->sc_fpstate[0]; + __asm__ volatile (".chip 68k/68881\n\t" + "fmovemx %%fp0-%%fp1,%0\n\t" + "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t" + ".chip 68k" + : "=m" (*sc->sc_fpregs), + "=m" (*sc->sc_fpcntl) + : /* no inputs */ + : "memory"); + } +} + +static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs) +{ + unsigned char fpstate[FPCONTEXT_SIZE]; + int context_size = 0; + int err = 0; + + if (FPU_IS_EMU) { + /* save fpu control register */ + err |= copy_to_user(uc->uc_mcontext.fpregs.f_pcntl, + current->thread.fpcntl, 12); + /* save all other fpu register */ + err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpregs, + current->thread.fp, 96); + return err; + } + + __asm__ volatile (".chip 68k/68881\n\t" + "fsave %0\n\t" + ".chip 68k" + : : "m" (*fpstate) : "memory"); + + err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate); + if (fpstate[0]) { + fpregset_t fpregs; + context_size = fpstate[1]; + fpu_version = fpstate[0]; + __asm__ volatile (".chip 68k/68881\n\t" + "fmovemx %%fp0-%%fp7,%0\n\t" + "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t" + ".chip 68k" + : "=m" (*fpregs.f_fpregs), + "=m" (*fpregs.f_fpcntl) + : /* no inputs */ + : "memory"); + err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs, + sizeof(fpregs)); + } + if (context_size) + err |= copy_to_user((long __user *)&uc->uc_fpstate + 1, fpstate + 4, + context_size); + return err; +} + +#endif + +static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs, + unsigned long mask) +{ + sc->sc_mask = mask; + sc->sc_usp = rdusp(); + sc->sc_d0 = regs->d0; + sc->sc_d1 = regs->d1; + sc->sc_a0 = regs->a0; + sc->sc_a1 = regs->a1; + sc->sc_a5 = ((struct switch_stack *)regs - 1)->a5; + sc->sc_sr = regs->sr; + sc->sc_pc = regs->pc; + sc->sc_formatvec = regs->format << 12 | regs->vector; +#ifdef CONFIG_FPU + save_fpu_state(sc, regs); +#endif +} + +static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs) +{ + struct switch_stack *sw = (struct switch_stack *)regs - 1; + greg_t __user *gregs = uc->uc_mcontext.gregs; + int err = 0; + + err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version); + err |= __put_user(regs->d0, &gregs[0]); + err |= __put_user(regs->d1, &gregs[1]); + err |= __put_user(regs->d2, &gregs[2]); + err |= __put_user(regs->d3, &gregs[3]); + err |= __put_user(regs->d4, &gregs[4]); + err |= __put_user(regs->d5, &gregs[5]); + err |= __put_user(sw->d6, &gregs[6]); + err |= __put_user(sw->d7, &gregs[7]); + err |= __put_user(regs->a0, &gregs[8]); + err |= __put_user(regs->a1, &gregs[9]); + err |= __put_user(regs->a2, &gregs[10]); + err |= __put_user(sw->a3, &gregs[11]); + err |= __put_user(sw->a4, &gregs[12]); + err |= __put_user(sw->a5, &gregs[13]); + err |= __put_user(sw->a6, &gregs[14]); + err |= __put_user(rdusp(), &gregs[15]); + err |= __put_user(regs->pc, &gregs[16]); + err |= __put_user(regs->sr, &gregs[17]); +#ifdef CONFIG_FPU + err |= rt_save_fpu_state(uc, regs); +#endif + return err; +} + +static inline void __user * +get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size) +{ + unsigned long usp; + + /* Default to using normal stack. */ + usp = rdusp(); + + /* This is the X/Open sanctioned signal stack switching. */ + if (ka->sa.sa_flags & SA_ONSTACK) { + if (!sas_ss_flags(usp)) + usp = current->sas_ss_sp + current->sas_ss_size; + } + return (void __user *)((usp - frame_size) & -8UL); +} + +static int setup_frame (int sig, struct k_sigaction *ka, + sigset_t *set, struct pt_regs *regs) +{ + struct sigframe __user *frame; + struct sigcontext context; + int err = 0; + + frame = get_sigframe(ka, regs, sizeof(*frame)); + + err |= __put_user((current_thread_info()->exec_domain + && current_thread_info()->exec_domain->signal_invmap + && sig < 32 + ? current_thread_info()->exec_domain->signal_invmap[sig] + : sig), + &frame->sig); + + err |= __put_user(regs->vector, &frame->code); + err |= __put_user(&frame->sc, &frame->psc); + + if (_NSIG_WORDS > 1) + err |= copy_to_user(frame->extramask, &set->sig[1], + sizeof(frame->extramask)); + + setup_sigcontext(&context, regs, set->sig[0]); + err |= copy_to_user (&frame->sc, &context, sizeof(context)); + + /* Set up to return from userspace. */ + err |= __put_user((void *) ret_from_user_signal, &frame->pretcode); + + if (err) + goto give_sigsegv; + + /* Set up registers for signal handler */ + wrusp ((unsigned long) frame); + regs->pc = (unsigned long) ka->sa.sa_handler; + ((struct switch_stack *)regs - 1)->a5 = current->mm->start_data; + regs->format = 0x4; /*set format byte to make stack appear modulo 4 + which it will be when doing the rte */ + +adjust_stack: + /* Prepare to skip over the extra stuff in the exception frame. */ + if (regs->stkadj) { + struct pt_regs *tregs = + (struct pt_regs *)((ulong)regs + regs->stkadj); +#if defined(DEBUG) + printk(KERN_DEBUG "Performing stackadjust=%04x\n", regs->stkadj); +#endif + /* This must be copied with decreasing addresses to + handle overlaps. */ + tregs->vector = 0; + tregs->format = 0; + tregs->pc = regs->pc; + tregs->sr = regs->sr; + } + return err; + +give_sigsegv: + force_sigsegv(sig, current); + goto adjust_stack; +} + +static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info, + sigset_t *set, struct pt_regs *regs) +{ + struct rt_sigframe __user *frame; + int err = 0; + + frame = get_sigframe(ka, regs, sizeof(*frame)); + + err |= __put_user((current_thread_info()->exec_domain + && current_thread_info()->exec_domain->signal_invmap + && sig < 32 + ? current_thread_info()->exec_domain->signal_invmap[sig] + : sig), + &frame->sig); + err |= __put_user(&frame->info, &frame->pinfo); + err |= __put_user(&frame->uc, &frame->puc); + err |= copy_siginfo_to_user(&frame->info, info); + + /* Create the ucontext. */ + err |= __put_user(0, &frame->uc.uc_flags); + err |= __put_user(NULL, &frame->uc.uc_link); + err |= __put_user((void __user *)current->sas_ss_sp, + &frame->uc.uc_stack.ss_sp); + err |= __put_user(sas_ss_flags(rdusp()), + &frame->uc.uc_stack.ss_flags); + err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); + err |= rt_setup_ucontext(&frame->uc, regs); + err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set)); + + /* Set up to return from userspace. */ + err |= __put_user((void *) ret_from_user_rt_signal, &frame->pretcode); + + if (err) + goto give_sigsegv; + + /* Set up registers for signal handler */ + wrusp ((unsigned long) frame); + regs->pc = (unsigned long) ka->sa.sa_handler; + ((struct switch_stack *)regs - 1)->a5 = current->mm->start_data; + regs->format = 0x4; /*set format byte to make stack appear modulo 4 + which it will be when doing the rte */ + +adjust_stack: + /* Prepare to skip over the extra stuff in the exception frame. */ + if (regs->stkadj) { + struct pt_regs *tregs = + (struct pt_regs *)((ulong)regs + regs->stkadj); +#if defined(DEBUG) + printk(KERN_DEBUG "Performing stackadjust=%04x\n", regs->stkadj); +#endif + /* This must be copied with decreasing addresses to + handle overlaps. */ + tregs->vector = 0; + tregs->format = 0; + tregs->pc = regs->pc; + tregs->sr = regs->sr; + } + return err; + +give_sigsegv: + force_sigsegv(sig, current); + goto adjust_stack; +} + +static inline void +handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler) +{ + switch (regs->d0) { + case -ERESTARTNOHAND: + if (!has_handler) + goto do_restart; + regs->d0 = -EINTR; + break; + + case -ERESTART_RESTARTBLOCK: + if (!has_handler) { + regs->d0 = __NR_restart_syscall; + regs->pc -= 2; + break; + } + regs->d0 = -EINTR; + break; + + case -ERESTARTSYS: + if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) { + regs->d0 = -EINTR; + break; + } + /* fallthrough */ + case -ERESTARTNOINTR: + do_restart: + regs->d0 = regs->orig_d0; + regs->pc -= 2; + break; + } +} + +/* + * OK, we're invoking a handler + */ +static void +handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info, + sigset_t *oldset, struct pt_regs *regs) +{ + int err; + /* are we from a system call? */ + if (regs->orig_d0 >= 0) + /* If so, check system call restarting.. */ + handle_restart(regs, ka, 1); + + /* set up the stack frame */ + if (ka->sa.sa_flags & SA_SIGINFO) + err = setup_rt_frame(sig, ka, info, oldset, regs); + else + err = setup_frame(sig, ka, oldset, regs); + + if (err) + return; + + spin_lock_irq(¤t->sighand->siglock); + sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); + if (!(ka->sa.sa_flags & SA_NODEFER)) + sigaddset(¤t->blocked,sig); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + clear_thread_flag(TIF_RESTORE_SIGMASK); +} + +/* + * Note that 'init' is a special process: it doesn't get signals it doesn't + * want to handle. Thus you cannot kill init even with a SIGKILL even by + * mistake. + */ +asmlinkage void do_signal(struct pt_regs *regs) +{ + struct k_sigaction ka; + siginfo_t info; + int signr; + sigset_t *oldset; + + /* + * We want the common case to go fast, which + * is why we may in certain cases get here from + * kernel mode. Just return without doing anything + * if so. + */ + if (!user_mode(regs)) + return; + + if (test_thread_flag(TIF_RESTORE_SIGMASK)) + oldset = ¤t->saved_sigmask; + else + oldset = ¤t->blocked; + + signr = get_signal_to_deliver(&info, &ka, regs, NULL); + if (signr > 0) { + /* Whee! Actually deliver the signal. */ + handle_signal(signr, &ka, &info, oldset, regs); + return; + } + + /* Did we come from a system call? */ + if (regs->orig_d0 >= 0) { + /* Restart the system call - no handlers present */ + handle_restart(regs, NULL, 0); + } + + /* If there's no signal to deliver, we just restore the saved mask. */ + if (test_thread_flag(TIF_RESTORE_SIGMASK)) { + clear_thread_flag(TIF_RESTORE_SIGMASK); + sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); + } +} diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c index 3db2e7f..63013df 100644 --- a/arch/m68k/kernel/sys_m68k.c +++ b/arch/m68k/kernel/sys_m68k.c @@ -1,546 +1,5 @@ -/* - * linux/arch/m68k/kernel/sys_m68k.c - * - * This file contains various random system calls that - * have a non-standard calling sequence on the Linux/m68k - * platform. - */ - -#include <linux/capability.h> -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/mm.h> -#include <linux/fs.h> -#include <linux/smp.h> -#include <linux/sem.h> -#include <linux/msg.h> -#include <linux/shm.h> -#include <linux/stat.h> -#include <linux/syscalls.h> -#include <linux/mman.h> -#include <linux/file.h> -#include <linux/ipc.h> - -#include <asm/setup.h> -#include <asm/uaccess.h> -#include <asm/cachectl.h> -#include <asm/traps.h> -#include <asm/page.h> -#include <asm/unistd.h> -#include <linux/elf.h> -#include <asm/tlb.h> - -asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address, - unsigned long error_code); - -asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, - unsigned long prot, unsigned long flags, - unsigned long fd, unsigned long pgoff) -{ - /* - * This is wrong for sun3 - there PAGE_SIZE is 8Kb, - * so we need to shift the argument down by 1; m68k mmap64(3) - * (in libc) expects the last argument of mmap2 in 4Kb units. - */ - return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); -} - -/* Convert virtual (user) address VADDR to physical address PADDR */ -#define virt_to_phys_040(vaddr) \ -({ \ - unsigned long _mmusr, _paddr; \ - \ - __asm__ __volatile__ (".chip 68040\n\t" \ - "ptestr (%1)\n\t" \ - "movec %%mmusr,%0\n\t" \ - ".chip 68k" \ - : "=r" (_mmusr) \ - : "a" (vaddr)); \ - _paddr = (_mmusr & MMU_R_040) ? (_mmusr & PAGE_MASK) : 0; \ - _paddr; \ -}) - -static inline int -cache_flush_040 (unsigned long addr, int scope, int cache, unsigned long len) -{ - unsigned long paddr, i; - - switch (scope) - { - case FLUSH_SCOPE_ALL: - switch (cache) - { - case FLUSH_CACHE_DATA: - /* This nop is needed for some broken versions of the 68040. */ - __asm__ __volatile__ ("nop\n\t" - ".chip 68040\n\t" - "cpusha %dc\n\t" - ".chip 68k"); - break; - case FLUSH_CACHE_INSN: - __asm__ __volatile__ ("nop\n\t" - ".chip 68040\n\t" - "cpusha %ic\n\t" - ".chip 68k"); - break; - default: - case FLUSH_CACHE_BOTH: - __asm__ __volatile__ ("nop\n\t" - ".chip 68040\n\t" - "cpusha %bc\n\t" - ".chip 68k"); - break; - } - break; - - case FLUSH_SCOPE_LINE: - /* Find the physical address of the first mapped page in the - address range. */ - if ((paddr = virt_to_phys_040(addr))) { - paddr += addr & ~(PAGE_MASK | 15); - len = (len + (addr & 15) + 15) >> 4; - } else { - unsigned long tmp = PAGE_SIZE - (addr & ~PAGE_MASK); - - if (len <= tmp) - return 0; - addr += tmp; - len -= tmp; - tmp = PAGE_SIZE; - for (;;) - { - if ((paddr = virt_to_phys_040(addr))) - break; - if (len <= tmp) - return 0; - addr += tmp; - len -= tmp; - } - len = (len + 15) >> 4; - } - i = (PAGE_SIZE - (paddr & ~PAGE_MASK)) >> 4; - while (len--) - { - switch (cache) - { - case FLUSH_CACHE_DATA: - __asm__ __volatile__ ("nop\n\t" - ".chip 68040\n\t" - "cpushl %%dc,(%0)\n\t" - ".chip 68k" - : : "a" (paddr)); - break; - case FLUSH_CACHE_INSN: - __asm__ __volatile__ ("nop\n\t" - ".chip 68040\n\t" - "cpushl %%ic,(%0)\n\t" - ".chip 68k" - : : "a" (paddr)); - break; - default: - case FLUSH_CACHE_BOTH: - __asm__ __volatile__ ("nop\n\t" - ".chip 68040\n\t" - "cpushl %%bc,(%0)\n\t" - ".chip 68k" - : : "a" (paddr)); - break; - } - if (!--i && len) - { - /* - * No need to page align here since it is done by - * virt_to_phys_040(). - */ - addr += PAGE_SIZE; - i = PAGE_SIZE / 16; - /* Recompute physical address when crossing a page - boundary. */ - for (;;) - { - if ((paddr = virt_to_phys_040(addr))) - break; - if (len <= i) - return 0; - len -= i; - addr += PAGE_SIZE; - } - } - else - paddr += 16; - } - break; - - default: - case FLUSH_SCOPE_PAGE: - len += (addr & ~PAGE_MASK) + (PAGE_SIZE - 1); - for (len >>= PAGE_SHIFT; len--; addr += PAGE_SIZE) - { - if (!(paddr = virt_to_phys_040(addr))) - continue; - switch (cache) - { - case FLUSH_CACHE_DATA: - __asm__ __volatile__ ("nop\n\t" - ".chip 68040\n\t" - "cpushp %%dc,(%0)\n\t" - ".chip 68k" - : : "a" (paddr)); - break; - case FLUSH_CACHE_INSN: - __asm__ __volatile__ ("nop\n\t" - ".chip 68040\n\t" - "cpushp %%ic,(%0)\n\t" - ".chip 68k" - : : "a" (paddr)); - break; - default: - case FLUSH_CACHE_BOTH: - __asm__ __volatile__ ("nop\n\t" - ".chip 68040\n\t" - "cpushp %%bc,(%0)\n\t" - ".chip 68k" - : : "a" (paddr)); - break; - } - } - break; - } - return 0; -} - -#define virt_to_phys_060(vaddr) \ -({ \ - unsigned long paddr; \ - __asm__ __volatile__ (".chip 68060\n\t" \ - "plpar (%0)\n\t" \ - ".chip 68k" \ - : "=a" (paddr) \ - : "0" (vaddr)); \ - (paddr); /* XXX */ \ -}) - -static inline int -cache_flush_060 (unsigned long addr, int scope, int cache, unsigned long len) -{ - unsigned long paddr, i; - - /* - * 68060 manual says: - * cpush %dc : flush DC, remains valid (with our %cacr setup) - * cpush %ic : invalidate IC - * cpush %bc : flush DC + invalidate IC - */ - switch (scope) - { - case FLUSH_SCOPE_ALL: - switch (cache) - { - case FLUSH_CACHE_DATA: - __asm__ __volatile__ (".chip 68060\n\t" - "cpusha %dc\n\t" - ".chip 68k"); - break; - case FLUSH_CACHE_INSN: - __asm__ __volatile__ (".chip 68060\n\t" - "cpusha %ic\n\t" - ".chip 68k"); - break; - default: - case FLUSH_CACHE_BOTH: - __asm__ __volatile__ (".chip 68060\n\t" - "cpusha %bc\n\t" - ".chip 68k"); - break; - } - break; - - case FLUSH_SCOPE_LINE: - /* Find the physical address of the first mapped page in the - address range. */ - len += addr & 15; - addr &= -16; - if (!(paddr = virt_to_phys_060(addr))) { - unsigned long tmp = PAGE_SIZE - (addr & ~PAGE_MASK); - - if (len <= tmp) - return 0; - addr += tmp; - len -= tmp; - tmp = PAGE_SIZE; - for (;;) - { - if ((paddr = virt_to_phys_060(addr))) - break; - if (len <= tmp) - return 0; - addr += tmp; - len -= tmp; - } - } - len = (len + 15) >> 4; - i = (PAGE_SIZE - (paddr & ~PAGE_MASK)) >> 4; - while (len--) - { - switch (cache) - { - case FLUSH_CACHE_DATA: - __asm__ __volatile__ (".chip 68060\n\t" - "cpushl %%dc,(%0)\n\t" - ".chip 68k" - : : "a" (paddr)); - break; - case FLUSH_CACHE_INSN: - __asm__ __volatile__ (".chip 68060\n\t" - "cpushl %%ic,(%0)\n\t" - ".chip 68k" - : : "a" (paddr)); - break; - default: - case FLUSH_CACHE_BOTH: - __asm__ __volatile__ (".chip 68060\n\t" - "cpushl %%bc,(%0)\n\t" - ".chip 68k" - : : "a" (paddr)); - break; - } - if (!--i && len) - { - - /* - * We just want to jump to the first cache line - * in the next page. - */ - addr += PAGE_SIZE; - addr &= PAGE_MASK; - - i = PAGE_SIZE / 16; - /* Recompute physical address when crossing a page - boundary. */ - for (;;) - { - if ((paddr = virt_to_phys_060(addr))) - break; - if (len <= i) - return 0; - len -= i; - addr += PAGE_SIZE; - } - } - else - paddr += 16; - } - break; - - default: - case FLUSH_SCOPE_PAGE: - len += (addr & ~PAGE_MASK) + (PAGE_SIZE - 1); - addr &= PAGE_MASK; /* Workaround for bug in some - revisions of the 68060 */ - for (len >>= PAGE_SHIFT; len--; addr += PAGE_SIZE) - { - if (!(paddr = virt_to_phys_060(addr))) - continue; - switch (cache) - { - case FLUSH_CACHE_DATA: - __asm__ __volatile__ (".chip 68060\n\t" - "cpushp %%dc,(%0)\n\t" - ".chip 68k" - : : "a" (paddr)); - break; - case FLUSH_CACHE_INSN: - __asm__ __volatile__ (".chip 68060\n\t" - "cpushp %%ic,(%0)\n\t" - ".chip 68k" - : : "a" (paddr)); - break; - default: - case FLUSH_CACHE_BOTH: - __asm__ __volatile__ (".chip 68060\n\t" - "cpushp %%bc,(%0)\n\t" - ".chip 68k" - : : "a" (paddr)); - break; - } - } - break; - } - return 0; -} - -/* sys_cacheflush -- flush (part of) the processor cache. */ -asmlinkage int -sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) -{ - struct vm_area_struct *vma; - int ret = -EINVAL; - - if (scope < FLUSH_SCOPE_LINE || scope > FLUSH_SCOPE_ALL || - cache & ~FLUSH_CACHE_BOTH) - goto out; - - if (scope == FLUSH_SCOPE_ALL) { - /* Only the superuser may explicitly flush the whole cache. */ - ret = -EPERM; - if (!capable(CAP_SYS_ADMIN)) - goto out; - } else { - /* - * Verify that the specified address region actually belongs - * to this process. - */ - vma = find_vma (current->mm, addr); - ret = -EINVAL; - /* Check for overflow. */ - if (addr + len < addr) - goto out; - if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) - goto out; - } - - if (CPU_IS_020_OR_030) { - if (scope == FLUSH_SCOPE_LINE && len < 256) { - unsigned long cacr; - __asm__ ("movec %%cacr, %0" : "=r" (cacr)); - if (cache & FLUSH_CACHE_INSN) - cacr |= 4; - if (cache & FLUSH_CACHE_DATA) - cacr |= 0x400; - len >>= 2; - while (len--) { - __asm__ __volatile__ ("movec %1, %%caar\n\t" - "movec %0, %%cacr" - : /* no outputs */ - : "r" (cacr), "r" (addr)); - addr += 4; - } - } else { - /* Flush the whole cache, even if page granularity requested. */ - unsigned long cacr; - __asm__ ("movec %%cacr, %0" : "=r" (cacr)); - if (cache & FLUSH_CACHE_INSN) - cacr |= 8; - if (cache & FLUSH_CACHE_DATA) - cacr |= 0x800; - __asm__ __volatile__ ("movec %0, %%cacr" : : "r" (cacr)); - } - ret = 0; - goto out; - } else { - /* - * 040 or 060: don't blindly trust 'scope', someone could - * try to flush a few megs of memory. - */ - - if (len>=3*PAGE_SIZE && scope<FLUSH_SCOPE_PAGE) - scope=FLUSH_SCOPE_PAGE; - if (len>=10*PAGE_SIZE && scope<FLUSH_SCOPE_ALL) - scope=FLUSH_SCOPE_ALL; - if (CPU_IS_040) { - ret = cache_flush_040 (addr, scope, cache, len); - } else if (CPU_IS_060) { - ret = cache_flush_060 (addr, scope, cache, len); - } - } -out: - return ret; -} - -asmlinkage int sys_getpagesize(void) -{ - return PAGE_SIZE; -} - -/* - * Do a system call from kernel instead of calling sys_execve so we - * end up with proper pt_regs. - */ -int kernel_execve(const char *filename, - const char *const argv[], - const char *const envp[]) -{ - register long __res asm ("%d0") = __NR_execve; - register long __a asm ("%d1") = (long)(filename); - register long __b asm ("%d2") = (long)(argv); - register long __c asm ("%d3") = (long)(envp); - asm volatile ("trap #0" : "+d" (__res) - : "d" (__a), "d" (__b), "d" (__c)); - return __res; -} - -asmlinkage unsigned long sys_get_thread_area(void) -{ - return current_thread_info()->tp_value; -} - -asmlinkage int sys_set_thread_area(unsigned long tp) -{ - current_thread_info()->tp_value = tp; - return 0; -} - -/* This syscall gets its arguments in A0 (mem), D2 (oldval) and - D1 (newval). */ -asmlinkage int -sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5, - unsigned long __user * mem) -{ - /* This was borrowed from ARM's implementation. */ - for (;;) { - struct mm_struct *mm = current->mm; - pgd_t *pgd; - pmd_t *pmd; - pte_t *pte; - spinlock_t *ptl; - unsigned long mem_value; - - down_read(&mm->mmap_sem); - pgd = pgd_offset(mm, (unsigned long)mem); - if (!pgd_present(*pgd)) - goto bad_access; - pmd = pmd_offset(pgd, (unsigned long)mem); - if (!pmd_present(*pmd)) - goto bad_access; - pte = pte_offset_map_lock(mm, pmd, (unsigned long)mem, &ptl); - if (!pte_present(*pte) || !pte_dirty(*pte) - || !pte_write(*pte)) { - pte_unmap_unlock(pte, ptl); - goto bad_access; - } - - mem_value = *mem; - if (mem_value == oldval) - *mem = newval; - - pte_unmap_unlock(pte, ptl); - up_read(&mm->mmap_sem); - return mem_value; - - bad_access: - up_read(&mm->mmap_sem); - /* This is not necessarily a bad access, we can get here if - a memory we're trying to write to should be copied-on-write. - Make the kernel do the necessary page stuff, then re-iterate. - Simulate a write access fault to do that. */ - { - /* The first argument of the function corresponds to - D1, which is the first field of struct pt_regs. */ - struct pt_regs *fp = (struct pt_regs *)&newval; - - /* '3' is an RMW flag. */ - if (do_page_fault(fp, (unsigned long)mem, 3)) - /* If the do_page_fault() failed, we don't - have anything meaningful to return. - There should be a SIGSEGV pending for - the process. */ - return 0xdeadbeef; - } - } -} - -asmlinkage int sys_atomic_barrier(void) -{ - /* no code needed for uniprocs */ - return 0; -} +#ifdef CONFIG_MMU +#include "sys_m68k_mm.c" +#else +#include "sys_m68k_no.c" +#endif diff --git a/arch/m68k/kernel/sys_m68k_mm.c b/arch/m68k/kernel/sys_m68k_mm.c new file mode 100644 index 0000000..3db2e7f --- /dev/null +++ b/arch/m68k/kernel/sys_m68k_mm.c @@ -0,0 +1,546 @@ +/* + * linux/arch/m68k/kernel/sys_m68k.c + * + * This file contains various random system calls that + * have a non-standard calling sequence on the Linux/m68k + * platform. + */ + +#include <linux/capability.h> +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/fs.h> +#include <linux/smp.h> +#include <linux/sem.h> +#include <linux/msg.h> +#include <linux/shm.h> +#include <linux/stat.h> +#include <linux/syscalls.h> +#include <linux/mman.h> +#include <linux/file.h> +#include <linux/ipc.h> + +#include <asm/setup.h> +#include <asm/uaccess.h> +#include <asm/cachectl.h> +#include <asm/traps.h> +#include <asm/page.h> +#include <asm/unistd.h> +#include <linux/elf.h> +#include <asm/tlb.h> + +asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address, + unsigned long error_code); + +asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff) +{ + /* + * This is wrong for sun3 - there PAGE_SIZE is 8Kb, + * so we need to shift the argument down by 1; m68k mmap64(3) + * (in libc) expects the last argument of mmap2 in 4Kb units. + */ + return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); +} + +/* Convert virtual (user) address VADDR to physical address PADDR */ +#define virt_to_phys_040(vaddr) \ +({ \ + unsigned long _mmusr, _paddr; \ + \ + __asm__ __volatile__ (".chip 68040\n\t" \ + "ptestr (%1)\n\t" \ + "movec %%mmusr,%0\n\t" \ + ".chip 68k" \ + : "=r" (_mmusr) \ + : "a" (vaddr)); \ + _paddr = (_mmusr & MMU_R_040) ? (_mmusr & PAGE_MASK) : 0; \ + _paddr; \ +}) + +static inline int +cache_flush_040 (unsigned long addr, int scope, int cache, unsigned long len) +{ + unsigned long paddr, i; + + switch (scope) + { + case FLUSH_SCOPE_ALL: + switch (cache) + { + case FLUSH_CACHE_DATA: + /* This nop is needed for some broken versions of the 68040. */ + __asm__ __volatile__ ("nop\n\t" + ".chip 68040\n\t" + "cpusha %dc\n\t" + ".chip 68k"); + break; + case FLUSH_CACHE_INSN: + __asm__ __volatile__ ("nop\n\t" + ".chip 68040\n\t" + "cpusha %ic\n\t" + ".chip 68k"); + break; + default: + case FLUSH_CACHE_BOTH: + __asm__ __volatile__ ("nop\n\t" + ".chip 68040\n\t" + "cpusha %bc\n\t" + ".chip 68k"); + break; + } + break; + + case FLUSH_SCOPE_LINE: + /* Find the physical address of the first mapped page in the + address range. */ + if ((paddr = virt_to_phys_040(addr))) { + paddr += addr & ~(PAGE_MASK | 15); + len = (len + (addr & 15) + 15) >> 4; + } else { + unsigned long tmp = PAGE_SIZE - (addr & ~PAGE_MASK); + + if (len <= tmp) + return 0; + addr += tmp; + len -= tmp; + tmp = PAGE_SIZE; + for (;;) + { + if ((paddr = virt_to_phys_040(addr))) + break; + if (len <= tmp) + return 0; + addr += tmp; + len -= tmp; + } + len = (len + 15) >> 4; + } + i = (PAGE_SIZE - (paddr & ~PAGE_MASK)) >> 4; + while (len--) + { + switch (cache) + { + case FLUSH_CACHE_DATA: + __asm__ __volatile__ ("nop\n\t" + ".chip 68040\n\t" + "cpushl %%dc,(%0)\n\t" + ".chip 68k" + : : "a" (paddr)); + break; + case FLUSH_CACHE_INSN: + __asm__ __volatile__ ("nop\n\t" + ".chip 68040\n\t" + "cpushl %%ic,(%0)\n\t" + ".chip 68k" + : : "a" (paddr)); + break; + default: + case FLUSH_CACHE_BOTH: + __asm__ __volatile__ ("nop\n\t" + ".chip 68040\n\t" + "cpushl %%bc,(%0)\n\t" + ".chip 68k" + : : "a" (paddr)); + break; + } + if (!--i && len) + { + /* + * No need to page align here since it is done by + * virt_to_phys_040(). + */ + addr += PAGE_SIZE; + i = PAGE_SIZE / 16; + /* Recompute physical address when crossing a page + boundary. */ + for (;;) + { + if ((paddr = virt_to_phys_040(addr))) + break; + if (len <= i) + return 0; + len -= i; + addr += PAGE_SIZE; + } + } + else + paddr += 16; + } + break; + + default: + case FLUSH_SCOPE_PAGE: + len += (addr & ~PAGE_MASK) + (PAGE_SIZE - 1); + for (len >>= PAGE_SHIFT; len--; addr += PAGE_SIZE) + { + if (!(paddr = virt_to_phys_040(addr))) + continue; + switch (cache) + { + case FLUSH_CACHE_DATA: + __asm__ __volatile__ ("nop\n\t" + ".chip 68040\n\t" + "cpushp %%dc,(%0)\n\t" + ".chip 68k" + : : "a" (paddr)); + break; + case FLUSH_CACHE_INSN: + __asm__ __volatile__ ("nop\n\t" + ".chip 68040\n\t" + "cpushp %%ic,(%0)\n\t" + ".chip 68k" + : : "a" (paddr)); + break; + default: + case FLUSH_CACHE_BOTH: + __asm__ __volatile__ ("nop\n\t" + ".chip 68040\n\t" + "cpushp %%bc,(%0)\n\t" + ".chip 68k" + : : "a" (paddr)); + break; + } + } + break; + } + return 0; +} + +#define virt_to_phys_060(vaddr) \ +({ \ + unsigned long paddr; \ + __asm__ __volatile__ (".chip 68060\n\t" \ + "plpar (%0)\n\t" \ + ".chip 68k" \ + : "=a" (paddr) \ + : "0" (vaddr)); \ + (paddr); /* XXX */ \ +}) + +static inline int +cache_flush_060 (unsigned long addr, int scope, int cache, unsigned long len) +{ + unsigned long paddr, i; + + /* + * 68060 manual says: + * cpush %dc : flush DC, remains valid (with our %cacr setup) + * cpush %ic : invalidate IC + * cpush %bc : flush DC + invalidate IC + */ + switch (scope) + { + case FLUSH_SCOPE_ALL: + switch (cache) + { + case FLUSH_CACHE_DATA: + __asm__ __volatile__ (".chip 68060\n\t" + "cpusha %dc\n\t" + ".chip 68k"); + break; + case FLUSH_CACHE_INSN: + __asm__ __volatile__ (".chip 68060\n\t" + "cpusha %ic\n\t" + ".chip 68k"); + break; + default: + case FLUSH_CACHE_BOTH: + __asm__ __volatile__ (".chip 68060\n\t" + "cpusha %bc\n\t" + ".chip 68k"); + break; + } + break; + + case FLUSH_SCOPE_LINE: + /* Find the physical address of the first mapped page in the + address range. */ + len += addr & 15; + addr &= -16; + if (!(paddr = virt_to_phys_060(addr))) { + unsigned long tmp = PAGE_SIZE - (addr & ~PAGE_MASK); + + if (len <= tmp) + return 0; + addr += tmp; + len -= tmp; + tmp = PAGE_SIZE; + for (;;) + { + if ((paddr = virt_to_phys_060(addr))) + break; + if (len <= tmp) + return 0; + addr += tmp; + len -= tmp; + } + } + len = (len + 15) >> 4; + i = (PAGE_SIZE - (paddr & ~PAGE_MASK)) >> 4; + while (len--) + { + switch (cache) + { + case FLUSH_CACHE_DATA: + __asm__ __volatile__ (".chip 68060\n\t" + "cpushl %%dc,(%0)\n\t" + ".chip 68k" + : : "a" (paddr)); + break; + case FLUSH_CACHE_INSN: + __asm__ __volatile__ (".chip 68060\n\t" + "cpushl %%ic,(%0)\n\t" + ".chip 68k" + : : "a" (paddr)); + break; + default: + case FLUSH_CACHE_BOTH: + __asm__ __volatile__ (".chip 68060\n\t" + "cpushl %%bc,(%0)\n\t" + ".chip 68k" + : : "a" (paddr)); + break; + } + if (!--i && len) + { + + /* + * We just want to jump to the first cache line + * in the next page. + */ + addr += PAGE_SIZE; + addr &= PAGE_MASK; + + i = PAGE_SIZE / 16; + /* Recompute physical address when crossing a page + boundary. */ + for (;;) + { + if ((paddr = virt_to_phys_060(addr))) + break; + if (len <= i) + return 0; + len -= i; + addr += PAGE_SIZE; + } + } + else + paddr += 16; + } + break; + + default: + case FLUSH_SCOPE_PAGE: + len += (addr & ~PAGE_MASK) + (PAGE_SIZE - 1); + addr &= PAGE_MASK; /* Workaround for bug in some + revisions of the 68060 */ + for (len >>= PAGE_SHIFT; len--; addr += PAGE_SIZE) + { + if (!(paddr = virt_to_phys_060(addr))) + continue; + switch (cache) + { + case FLUSH_CACHE_DATA: + __asm__ __volatile__ (".chip 68060\n\t" + "cpushp %%dc,(%0)\n\t" + ".chip 68k" + : : "a" (paddr)); + break; + case FLUSH_CACHE_INSN: + __asm__ __volatile__ (".chip 68060\n\t" + "cpushp %%ic,(%0)\n\t" + ".chip 68k" + : : "a" (paddr)); + break; + default: + case FLUSH_CACHE_BOTH: + __asm__ __volatile__ (".chip 68060\n\t" + "cpushp %%bc,(%0)\n\t" + ".chip 68k" + : : "a" (paddr)); + break; + } + } + break; + } + return 0; +} + +/* sys_cacheflush -- flush (part of) the processor cache. */ +asmlinkage int +sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) +{ + struct vm_area_struct *vma; + int ret = -EINVAL; + + if (scope < FLUSH_SCOPE_LINE || scope > FLUSH_SCOPE_ALL || + cache & ~FLUSH_CACHE_BOTH) + goto out; + + if (scope == FLUSH_SCOPE_ALL) { + /* Only the superuser may explicitly flush the whole cache. */ + ret = -EPERM; + if (!capable(CAP_SYS_ADMIN)) + goto out; + } else { + /* + * Verify that the specified address region actually belongs + * to this process. + */ + vma = find_vma (current->mm, addr); + ret = -EINVAL; + /* Check for overflow. */ + if (addr + len < addr) + goto out; + if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) + goto out; + } + + if (CPU_IS_020_OR_030) { + if (scope == FLUSH_SCOPE_LINE && len < 256) { + unsigned long cacr; + __asm__ ("movec %%cacr, %0" : "=r" (cacr)); + if (cache & FLUSH_CACHE_INSN) + cacr |= 4; + if (cache & FLUSH_CACHE_DATA) + cacr |= 0x400; + len >>= 2; + while (len--) { + __asm__ __volatile__ ("movec %1, %%caar\n\t" + "movec %0, %%cacr" + : /* no outputs */ + : "r" (cacr), "r" (addr)); + addr += 4; + } + } else { + /* Flush the whole cache, even if page granularity requested. */ + unsigned long cacr; + __asm__ ("movec %%cacr, %0" : "=r" (cacr)); + if (cache & FLUSH_CACHE_INSN) + cacr |= 8; + if (cache & FLUSH_CACHE_DATA) + cacr |= 0x800; + __asm__ __volatile__ ("movec %0, %%cacr" : : "r" (cacr)); + } + ret = 0; + goto out; + } else { + /* + * 040 or 060: don't blindly trust 'scope', someone could + * try to flush a few megs of memory. + */ + + if (len>=3*PAGE_SIZE && scope<FLUSH_SCOPE_PAGE) + scope=FLUSH_SCOPE_PAGE; + if (len>=10*PAGE_SIZE && scope<FLUSH_SCOPE_ALL) + scope=FLUSH_SCOPE_ALL; + if (CPU_IS_040) { + ret = cache_flush_040 (addr, scope, cache, len); + } else if (CPU_IS_060) { + ret = cache_flush_060 (addr, scope, cache, len); + } + } +out: + return ret; +} + +asmlinkage int sys_getpagesize(void) +{ + return PAGE_SIZE; +} + +/* + * Do a system call from kernel instead of calling sys_execve so we + * end up with proper pt_regs. + */ +int kernel_execve(const char *filename, + const char *const argv[], + const char *const envp[]) +{ + register long __res asm ("%d0") = __NR_execve; + register long __a asm ("%d1") = (long)(filename); + register long __b asm ("%d2") = (long)(argv); + register long __c asm ("%d3") = (long)(envp); + asm volatile ("trap #0" : "+d" (__res) + : "d" (__a), "d" (__b), "d" (__c)); + return __res; +} + +asmlinkage unsigned long sys_get_thread_area(void) +{ + return current_thread_info()->tp_value; +} + +asmlinkage int sys_set_thread_area(unsigned long tp) +{ + current_thread_info()->tp_value = tp; + return 0; +} + +/* This syscall gets its arguments in A0 (mem), D2 (oldval) and + D1 (newval). */ +asmlinkage int +sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5, + unsigned long __user * mem) +{ + /* This was borrowed from ARM's implementation. */ + for (;;) { + struct mm_struct *mm = current->mm; + pgd_t *pgd; + pmd_t *pmd; + pte_t *pte; + spinlock_t *ptl; + unsigned long mem_value; + + down_read(&mm->mmap_sem); + pgd = pgd_offset(mm, (unsigned long)mem); + if (!pgd_present(*pgd)) + goto bad_access; + pmd = pmd_offset(pgd, (unsigned long)mem); + if (!pmd_present(*pmd)) + goto bad_access; + pte = pte_offset_map_lock(mm, pmd, (unsigned long)mem, &ptl); + if (!pte_present(*pte) || !pte_dirty(*pte) + || !pte_write(*pte)) { + pte_unmap_unlock(pte, ptl); + goto bad_access; + } + + mem_value = *mem; + if (mem_value == oldval) + *mem = newval; + + pte_unmap_unlock(pte, ptl); + up_read(&mm->mmap_sem); + return mem_value; + + bad_access: + up_read(&mm->mmap_sem); + /* This is not necessarily a bad access, we can get here if + a memory we're trying to write to should be copied-on-write. + Make the kernel do the necessary page stuff, then re-iterate. + Simulate a write access fault to do that. */ + { + /* The first argument of the function corresponds to + D1, which is the first field of struct pt_regs. */ + struct pt_regs *fp = (struct pt_regs *)&newval; + + /* '3' is an RMW flag. */ + if (do_page_fault(fp, (unsigned long)mem, 3)) + /* If the do_page_fault() failed, we don't + have anything meaningful to return. + There should be a SIGSEGV pending for + the process. */ + return 0xdeadbeef; + } + } +} + +asmlinkage int sys_atomic_barrier(void) +{ + /* no code needed for uniprocs */ + return 0; +} diff --git a/arch/m68k/kernel/sys_m68k_no.c b/arch/m68k/kernel/sys_m68k_no.c new file mode 100644 index 0000000..68488ae --- /dev/null +++ b/arch/m68k/kernel/sys_m68k_no.c @@ -0,0 +1,94 @@ +/* + * linux/arch/m68knommu/kernel/sys_m68k.c + * + * This file contains various random system calls that + * have a non-standard calling sequence on the Linux/m68k + * platform. + */ + +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/sem.h> +#include <linux/msg.h> +#include <linux/shm.h> +#include <linux/stat.h> +#include <linux/syscalls.h> +#include <linux/mman.h> +#include <linux/file.h> +#include <linux/ipc.h> +#include <linux/fs.h> + +#include <asm/setup.h> +#include <asm/uaccess.h> +#include <asm/cachectl.h> +#include <asm/traps.h> +#include <asm/cacheflush.h> +#include <asm/unistd.h> + +/* sys_cacheflush -- flush (part of) the processor cache. */ +asmlinkage int +sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) +{ + flush_cache_all(); + return(0); +} + +asmlinkage int sys_getpagesize(void) +{ + return PAGE_SIZE; +} + +/* + * Do a system call from kernel instead of calling sys_execve so we + * end up with proper pt_regs. + */ +int kernel_execve(const char *filename, + const char *const argv[], + const char *const envp[]) +{ + register long __res asm ("%d0") = __NR_execve; + register long __a asm ("%d1") = (long)(filename); + register long __b asm ("%d2") = (long)(argv); + register long __c asm ("%d3") = (long)(envp); + asm volatile ("trap #0" : "+d" (__res) + : "d" (__a), "d" (__b), "d" (__c)); + return __res; +} + +asmlinkage unsigned long sys_get_thread_area(void) +{ + return current_thread_info()->tp_value; +} + +asmlinkage int sys_set_thread_area(unsigned long tp) +{ + current_thread_info()->tp_value = tp; + return 0; +} + +/* This syscall gets its arguments in A0 (mem), D2 (oldval) and + D1 (newval). */ +asmlinkage int +sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5, + unsigned long __user * mem) +{ + struct mm_struct *mm = current->mm; + unsigned long mem_value; + + down_read(&mm->mmap_sem); + + mem_value = *mem; + if (mem_value == oldval) + *mem = newval; + + up_read(&mm->mmap_sem); + return mem_value; +} + +asmlinkage int sys_atomic_barrier(void) +{ + /* no code needed for uniprocs */ + return 0; +} diff --git a/arch/m68k/kernel/syscalltable.S b/arch/m68k/kernel/syscalltable.S new file mode 100644 index 0000000..9b8393d --- /dev/null +++ b/arch/m68k/kernel/syscalltable.S @@ -0,0 +1,369 @@ +/* + * linux/arch/m68knommu/kernel/syscalltable.S + * + * Copyright (C) 2002, Greg Ungerer (gerg@snapgear.com) + * + * Based on older entry.S files, the following copyrights apply: + * + * Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>, + * Kenneth Albanowski <kjahds@kjahds.com>, + * Copyright (C) 2000 Lineo Inc. (www.lineo.com) + * Copyright (C) 1991, 1992 Linus Torvalds + */ + +#include <linux/sys.h> +#include <linux/linkage.h> +#include <asm/unistd.h> + +.text +ALIGN +ENTRY(sys_call_table) + .long sys_restart_syscall /* 0 - old "setup()" system call */ + .long sys_exit + .long sys_fork + .long sys_read + .long sys_write + .long sys_open /* 5 */ + .long sys_close + .long sys_waitpid + .long sys_creat + .long sys_link + .long sys_unlink /* 10 */ + .long sys_execve + .long sys_chdir + .long sys_time + .long sys_mknod + .long sys_chmod /* 15 */ + .long sys_chown16 + .long sys_ni_syscall /* old break syscall holder */ + .long sys_stat + .long sys_lseek + .long sys_getpid /* 20 */ + .long sys_mount + .long sys_oldumount + .long sys_setuid16 + .long sys_getuid16 + .long sys_stime /* 25 */ + .long sys_ptrace + .long sys_alarm + .long sys_fstat + .long sys_pause + .long sys_utime /* 30 */ + .long sys_ni_syscall /* old stty syscall holder */ + .long sys_ni_syscall /* old gtty syscall holder */ + .long sys_access + .long sys_nice + .long sys_ni_syscall /* 35 */ /* old ftime syscall holder */ + .long sys_sync + .long sys_kill + .long sys_rename + .long sys_mkdir + .long sys_rmdir /* 40 */ + .long sys_dup + .long sys_pipe + .long sys_times + .long sys_ni_syscall /* old prof syscall holder */ + .long sys_brk /* 45 */ + .long sys_setgid16 + .long sys_getgid16 + .long sys_signal + .long sys_geteuid16 + .long sys_getegid16 /* 50 */ + .long sys_acct + .long sys_umount /* recycled never used phys() */ + .long sys_ni_syscall /* old lock syscall holder */ + .long sys_ioctl + .long sys_fcntl /* 55 */ + .long sys_ni_syscall /* old mpx syscall holder */ + .long sys_setpgid + .long sys_ni_syscall /* old ulimit syscall holder */ + .long sys_ni_syscall + .long sys_umask /* 60 */ + .long sys_chroot + .long sys_ustat + .long sys_dup2 + .long sys_getppid + .long sys_getpgrp /* 65 */ + .long sys_setsid + .long sys_sigaction + .long sys_sgetmask + .long sys_ssetmask + .long sys_setreuid16 /* 70 */ + .long sys_setregid16 + .long sys_sigsuspend + .long sys_sigpending + .long sys_sethostname + .long sys_setrlimit /* 75 */ + .long sys_old_getrlimit + .long sys_getrusage + .long sys_gettimeofday + .long sys_settimeofday + .long sys_getgroups16 /* 80 */ + .long sys_setgroups16 + .long sys_old_select + .long sys_symlink + .long sys_lstat + .long sys_readlink /* 85 */ + .long sys_uselib + .long sys_ni_syscall /* sys_swapon */ + .long sys_reboot + .long sys_old_readdir + .long sys_old_mmap /* 90 */ + .long sys_munmap + .long sys_truncate + .long sys_ftruncate + .long sys_fchmod + .long sys_fchown16 /* 95 */ + .long sys_getpriority + .long sys_setpriority + .long sys_ni_syscall /* old profil syscall holder */ + .long sys_statfs + .long sys_fstatfs /* 100 */ + .long sys_ni_syscall /* ioperm for i386 */ + .long sys_socketcall + .long sys_syslog + .long sys_setitimer + .long sys_getitimer /* 105 */ + .long sys_newstat + .long sys_newlstat + .long sys_newfstat + .long sys_ni_syscall + .long sys_ni_syscall /* iopl for i386 */ /* 110 */ + .long sys_vhangup + .long sys_ni_syscall /* obsolete idle() syscall */ + .long sys_ni_syscall /* vm86old for i386 */ + .long sys_wait4 + .long sys_ni_syscall /* 115 */ /* sys_swapoff */ + .long sys_sysinfo + .long sys_ipc + .long sys_fsync + .long sys_sigreturn + .long sys_clone /* 120 */ + .long sys_setdomainname + .long sys_newuname + .long sys_cacheflush /* modify_ldt for i386 */ + .long sys_adjtimex + .long sys_ni_syscall /* 125 */ /* sys_mprotect */ + .long sys_sigprocmask + .long sys_ni_syscall /* old "creat_module" */ + .long sys_init_module + .long sys_delete_module + .long sys_ni_syscall /* 130: old "get_kernel_syms" */ + .long sys_quotactl + .long sys_getpgid + .long sys_fchdir + .long sys_bdflush + .long sys_sysfs /* 135 */ + .long sys_personality + .long sys_ni_syscall /* for afs_syscall */ + .long sys_setfsuid16 + .long sys_setfsgid16 + .long sys_llseek /* 140 */ + .long sys_getdents + .long sys_select + .long sys_flock + .long sys_ni_syscall /* sys_msync */ + .long sys_readv /* 145 */ + .long sys_writev + .long sys_getsid + .long sys_fdatasync + .long sys_sysctl + .long sys_ni_syscall /* 150 */ /* sys_mlock */ + .long sys_ni_syscall /* sys_munlock */ + .long sys_ni_syscall /* sys_mlockall */ + .long sys_ni_syscall /* sys_munlockall */ + .long sys_sched_setparam + .long sys_sched_getparam /* 155 */ + .long sys_sched_setscheduler + .long sys_sched_getscheduler + .long sys_sched_yield + .long sys_sched_get_priority_max + .long sys_sched_get_priority_min /* 160 */ + .long sys_sched_rr_get_interval + .long sys_nanosleep + .long sys_ni_syscall /* sys_mremap */ + .long sys_setresuid16 + .long sys_getresuid16 /* 165 */ + .long sys_getpagesize /* sys_getpagesize */ + .long sys_ni_syscall /* old "query_module" */ + .long sys_poll + .long sys_ni_syscall /* sys_nfsservctl */ + .long sys_setresgid16 /* 170 */ + .long sys_getresgid16 + .long sys_prctl + .long sys_rt_sigreturn + .long sys_rt_sigaction + .long sys_rt_sigprocmask /* 175 */ + .long sys_rt_sigpending + .long sys_rt_sigtimedwait + .long sys_rt_sigqueueinfo + .long sys_rt_sigsuspend + .long sys_pread64 /* 180 */ + .long sys_pwrite64 + .long sys_lchown16 + .long sys_getcwd + .long sys_capget + .long sys_capset /* 185 */ + .long sys_sigaltstack + .long sys_sendfile + .long sys_ni_syscall /* streams1 */ + .long sys_ni_syscall /* streams2 */ + .long sys_vfork /* 190 */ + .long sys_getrlimit + .long sys_mmap_pgoff + .long sys_truncate64 + .long sys_ftruncate64 + .long sys_stat64 /* 195 */ + .long sys_lstat64 + .long sys_fstat64 + .long sys_chown + .long sys_getuid + .long sys_getgid /* 200 */ + .long sys_geteuid + .long sys_getegid + .long sys_setreuid + .long sys_setregid + .long sys_getgroups /* 205 */ + .long sys_setgroups + .long sys_fchown + .long sys_setresuid + .long sys_getresuid + .long sys_setresgid /* 210 */ + .long sys_getresgid + .long sys_lchown + .long sys_setuid + .long sys_setgid + .long sys_setfsuid /* 215 */ + .long sys_setfsgid + .long sys_pivot_root + .long sys_ni_syscall + .long sys_ni_syscall + .long sys_getdents64 /* 220 */ + .long sys_gettid + .long sys_tkill + .long sys_setxattr + .long sys_lsetxattr + .long sys_fsetxattr /* 225 */ + .long sys_getxattr + .long sys_lgetxattr + .long sys_fgetxattr + .long sys_listxattr + .long sys_llistxattr /* 230 */ + .long sys_flistxattr + .long sys_removexattr + .long sys_lremovexattr + .long sys_fremovexattr + .long sys_futex /* 235 */ + .long sys_sendfile64 + .long sys_ni_syscall /* sys_mincore */ + .long sys_ni_syscall /* sys_madvise */ + .long sys_fcntl64 + .long sys_readahead /* 240 */ + .long sys_io_setup + .long sys_io_destroy + .long sys_io_getevents + .long sys_io_submit + .long sys_io_cancel /* 245 */ + .long sys_fadvise64 + .long sys_exit_group + .long sys_lookup_dcookie + .long sys_epoll_create + .long sys_epoll_ctl /* 250 */ + .long sys_epoll_wait + .long sys_ni_syscall /* sys_remap_file_pages */ + .long sys_set_tid_address + .long sys_timer_create + .long sys_timer_settime /* 255 */ + .long sys_timer_gettime + .long sys_timer_getoverrun + .long sys_timer_delete + .long sys_clock_settime + .long sys_clock_gettime /* 260 */ + .long sys_clock_getres + .long sys_clock_nanosleep + .long sys_statfs64 + .long sys_fstatfs64 + .long sys_tgkill /* 265 */ + .long sys_utimes + .long sys_fadvise64_64 + .long sys_mbind + .long sys_get_mempolicy + .long sys_set_mempolicy /* 270 */ + .long sys_mq_open + .long sys_mq_unlink + .long sys_mq_timedsend + .long sys_mq_timedreceive + .long sys_mq_notify /* 275 */ + .long sys_mq_getsetattr + .long sys_waitid + .long sys_ni_syscall /* for sys_vserver */ + .long sys_add_key + .long sys_request_key /* 280 */ + .long sys_keyctl + .long sys_ioprio_set + .long sys_ioprio_get + .long sys_inotify_init + .long sys_inotify_add_watch /* 285 */ + .long sys_inotify_rm_watch + .long sys_migrate_pages + .long sys_openat + .long sys_mkdirat + .long sys_mknodat /* 290 */ + .long sys_fchownat + .long sys_futimesat + .long sys_fstatat64 + .long sys_unlinkat + .long sys_renameat /* 295 */ + .long sys_linkat + .long sys_symlinkat + .long sys_readlinkat + .long sys_fchmodat + .long sys_faccessat /* 300 */ + .long sys_ni_syscall /* Reserved for pselect6 */ + .long sys_ni_syscall /* Reserved for ppoll */ + .long sys_unshare + .long sys_set_robust_list + .long sys_get_robust_list /* 305 */ + .long sys_splice + .long sys_sync_file_range + .long sys_tee + .long sys_vmsplice + .long sys_move_pages /* 310 */ + .long sys_sched_setaffinity + .long sys_sched_getaffinity + .long sys_kexec_load + .long sys_getcpu + .long sys_epoll_pwait /* 315 */ + .long sys_utimensat + .long sys_signalfd + .long sys_timerfd_create + .long sys_eventfd + .long sys_fallocate /* 320 */ + .long sys_timerfd_settime + .long sys_timerfd_gettime + .long sys_signalfd4 + .long sys_eventfd2 + .long sys_epoll_create1 /* 325 */ + .long sys_dup3 + .long sys_pipe2 + .long sys_inotify_init1 + .long sys_preadv + .long sys_pwritev /* 330 */ + .long sys_rt_tgsigqueueinfo + .long sys_perf_event_open + .long sys_get_thread_area + .long sys_set_thread_area + .long sys_atomic_cmpxchg_32 /* 335 */ + .long sys_atomic_barrier + .long sys_fanotify_init + .long sys_fanotify_mark + .long sys_prlimit64 + .long sys_name_to_handle_at /* 340 */ + .long sys_open_by_handle_at + .long sys_clock_adjtime + .long sys_syncfs + + .rept NR_syscalls-(.-sys_call_table)/4 + .long sys_ni_syscall + .endr + diff --git a/arch/m68k/kernel/time.c b/arch/m68k/kernel/time.c index 18b34ee..a5cf40c 100644 --- a/arch/m68k/kernel/time.c +++ b/arch/m68k/kernel/time.c @@ -1,114 +1,5 @@ -/* - * linux/arch/m68k/kernel/time.c - * - * Copyright (C) 1991, 1992, 1995 Linus Torvalds - * - * This file contains the m68k-specific time handling details. - * Most of the stuff is located in the machine specific files. - * - * 1997-09-10 Updated NTP code according to technical memorandum Jan '96 - * "A Kernel Model for Precision Timekeeping" by Dave Mills - */ - -#include <linux/errno.h> -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/param.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/rtc.h> -#include <linux/platform_device.h> - -#include <asm/machdep.h> -#include <asm/io.h> -#include <asm/irq_regs.h> - -#include <linux/time.h> -#include <linux/timex.h> -#include <linux/profile.h> - -static inline int set_rtc_mmss(unsigned long nowtime) -{ - if (mach_set_clock_mmss) - return mach_set_clock_mmss (nowtime); - return -1; -} - -/* - * timer_interrupt() needs to keep up the real-time clock, - * as well as call the "xtime_update()" routine every clocktick - */ -static irqreturn_t timer_interrupt(int irq, void *dummy) -{ - xtime_update(1); - update_process_times(user_mode(get_irq_regs())); - profile_tick(CPU_PROFILING); - -#ifdef CONFIG_HEARTBEAT - /* use power LED as a heartbeat instead -- much more useful - for debugging -- based on the version for PReP by Cort */ - /* acts like an actual heart beat -- ie thump-thump-pause... */ - if (mach_heartbeat) { - static unsigned cnt = 0, period = 0, dist = 0; - - if (cnt == 0 || cnt == dist) - mach_heartbeat( 1 ); - else if (cnt == 7 || cnt == dist+7) - mach_heartbeat( 0 ); - - if (++cnt > period) { - cnt = 0; - /* The hyperbolic function below modifies the heartbeat period - * length in dependency of the current (5min) load. It goes - * through the points f(0)=126, f(1)=86, f(5)=51, - * f(inf)->30. */ - period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30; - dist = period / 4; - } - } -#endif /* CONFIG_HEARTBEAT */ - return IRQ_HANDLED; -} - -void read_persistent_clock(struct timespec *ts) -{ - struct rtc_time time; - ts->tv_sec = 0; - ts->tv_nsec = 0; - - if (mach_hwclk) { - mach_hwclk(0, &time); - - if ((time.tm_year += 1900) < 1970) - time.tm_year += 100; - ts->tv_sec = mktime(time.tm_year, time.tm_mon, time.tm_mday, - time.tm_hour, time.tm_min, time.tm_sec); - } -} - -void __init time_init(void) -{ - mach_sched_init(timer_interrupt); -} - -u32 arch_gettimeoffset(void) -{ - return mach_gettimeoffset() * 1000; -} - -static int __init rtc_init(void) -{ - struct platform_device *pdev; - - if (!mach_hwclk) - return -ENODEV; - - pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0); - if (IS_ERR(pdev)) - return PTR_ERR(pdev); - - return 0; -} - -module_init(rtc_init); +#ifdef CONFIG_MMU +#include "time_mm.c" +#else +#include "time_no.c" +#endif diff --git a/arch/m68k/kernel/time_mm.c b/arch/m68k/kernel/time_mm.c new file mode 100644 index 0000000..18b34ee --- /dev/null +++ b/arch/m68k/kernel/time_mm.c @@ -0,0 +1,114 @@ +/* + * linux/arch/m68k/kernel/time.c + * + * Copyright (C) 1991, 1992, 1995 Linus Torvalds + * + * This file contains the m68k-specific time handling details. + * Most of the stuff is located in the machine specific files. + * + * 1997-09-10 Updated NTP code according to technical memorandum Jan '96 + * "A Kernel Model for Precision Timekeeping" by Dave Mills + */ + +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/param.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/rtc.h> +#include <linux/platform_device.h> + +#include <asm/machdep.h> +#include <asm/io.h> +#include <asm/irq_regs.h> + +#include <linux/time.h> +#include <linux/timex.h> +#include <linux/profile.h> + +static inline int set_rtc_mmss(unsigned long nowtime) +{ + if (mach_set_clock_mmss) + return mach_set_clock_mmss (nowtime); + return -1; +} + +/* + * timer_interrupt() needs to keep up the real-time clock, + * as well as call the "xtime_update()" routine every clocktick + */ +static irqreturn_t timer_interrupt(int irq, void *dummy) +{ + xtime_update(1); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); + +#ifdef CONFIG_HEARTBEAT + /* use power LED as a heartbeat instead -- much more useful + for debugging -- based on the version for PReP by Cort */ + /* acts like an actual heart beat -- ie thump-thump-pause... */ + if (mach_heartbeat) { + static unsigned cnt = 0, period = 0, dist = 0; + + if (cnt == 0 || cnt == dist) + mach_heartbeat( 1 ); + else if (cnt == 7 || cnt == dist+7) + mach_heartbeat( 0 ); + + if (++cnt > period) { + cnt = 0; + /* The hyperbolic function below modifies the heartbeat period + * length in dependency of the current (5min) load. It goes + * through the points f(0)=126, f(1)=86, f(5)=51, + * f(inf)->30. */ + period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30; + dist = period / 4; + } + } +#endif /* CONFIG_HEARTBEAT */ + return IRQ_HANDLED; +} + +void read_persistent_clock(struct timespec *ts) +{ + struct rtc_time time; + ts->tv_sec = 0; + ts->tv_nsec = 0; + + if (mach_hwclk) { + mach_hwclk(0, &time); + + if ((time.tm_year += 1900) < 1970) + time.tm_year += 100; + ts->tv_sec = mktime(time.tm_year, time.tm_mon, time.tm_mday, + time.tm_hour, time.tm_min, time.tm_sec); + } +} + +void __init time_init(void) +{ + mach_sched_init(timer_interrupt); +} + +u32 arch_gettimeoffset(void) +{ + return mach_gettimeoffset() * 1000; +} + +static int __init rtc_init(void) +{ + struct platform_device *pdev; + + if (!mach_hwclk) + return -ENODEV; + + pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + + return 0; +} + +module_init(rtc_init); diff --git a/arch/m68k/kernel/time_no.c b/arch/m68k/kernel/time_no.c new file mode 100644 index 0000000..6623909 --- /dev/null +++ b/arch/m68k/kernel/time_no.c @@ -0,0 +1,87 @@ +/* + * linux/arch/m68knommu/kernel/time.c + * + * Copyright (C) 1991, 1992, 1995 Linus Torvalds + * + * This file contains the m68k-specific time handling details. + * Most of the stuff is located in the machine specific files. + * + * 1997-09-10 Updated NTP code according to technical memorandum Jan '96 + * "A Kernel Model for Precision Timekeeping" by Dave Mills + */ + +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/param.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/profile.h> +#include <linux/time.h> +#include <linux/timex.h> + +#include <asm/machdep.h> +#include <asm/irq_regs.h> + +#define TICK_SIZE (tick_nsec / 1000) + +static inline int set_rtc_mmss(unsigned long nowtime) +{ + if (mach_set_clock_mmss) + return mach_set_clock_mmss (nowtime); + return -1; +} + +#ifndef CONFIG_GENERIC_CLOCKEVENTS +/* + * timer_interrupt() needs to keep up the real-time clock, + * as well as call the "xtime_update()" routine every clocktick + */ +irqreturn_t arch_timer_interrupt(int irq, void *dummy) +{ + + if (current->pid) + profile_tick(CPU_PROFILING); + + xtime_update(1); + + update_process_times(user_mode(get_irq_regs())); + + return(IRQ_HANDLED); +} +#endif + +static unsigned long read_rtc_mmss(void) +{ + unsigned int year, mon, day, hour, min, sec; + + if (mach_gettod) { + mach_gettod(&year, &mon, &day, &hour, &min, &sec); + if ((year += 1900) < 1970) + year += 100; + } else { + year = 1970; + mon = day = 1; + hour = min = sec = 0; + } + + + return mktime(year, mon, day, hour, min, sec); +} + +void read_persistent_clock(struct timespec *ts) +{ + ts->tv_sec = read_rtc_mmss(); + ts->tv_nsec = 0; +} + +int update_persistent_clock(struct timespec now) +{ + return set_rtc_mmss(now.tv_sec); +} + +void time_init(void) +{ + hw_timer_init(); +} diff --git a/arch/m68k/kernel/traps.c b/arch/m68k/kernel/traps.c index 4022bbc..c98add3 100644 --- a/arch/m68k/kernel/traps.c +++ b/arch/m68k/kernel/traps.c @@ -1,1207 +1,5 @@ -/* - * linux/arch/m68k/kernel/traps.c - * - * Copyright (C) 1993, 1994 by Hamish Macdonald - * - * 68040 fixes by Michael Rausch - * 68040 fixes by Martin Apel - * 68040 fixes and writeback by Richard Zidlicky - * 68060 fixes by Roman Hodek - * 68060 fixes by Jesper Skov - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file COPYING in the main directory of this archive - * for more details. - */ - -/* - * Sets up all exception vectors - */ - -#include <linux/sched.h> -#include <linux/signal.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/module.h> -#include <linux/user.h> -#include <linux/string.h> -#include <linux/linkage.h> -#include <linux/init.h> -#include <linux/ptrace.h> -#include <linux/kallsyms.h> - -#include <asm/setup.h> -#include <asm/fpu.h> -#include <asm/system.h> -#include <asm/uaccess.h> -#include <asm/traps.h> -#include <asm/pgalloc.h> -#include <asm/machdep.h> -#include <asm/siginfo.h> - -/* assembler routines */ -asmlinkage void system_call(void); -asmlinkage void buserr(void); -asmlinkage void trap(void); -asmlinkage void nmihandler(void); -#ifdef CONFIG_M68KFPU_EMU -asmlinkage void fpu_emu(void); -#endif - -e_vector vectors[256]; - -/* nmi handler for the Amiga */ -asm(".text\n" - __ALIGN_STR "\n" - "nmihandler: rte"); - -/* - * this must be called very early as the kernel might - * use some instruction that are emulated on the 060 - * and so we're prepared for early probe attempts (e.g. nf_init). - */ -void __init base_trap_init(void) -{ - if (MACH_IS_SUN3X) { - extern e_vector *sun3x_prom_vbr; - - __asm__ volatile ("movec %%vbr, %0" : "=r" (sun3x_prom_vbr)); - } - - /* setup the exception vector table */ - __asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)vectors)); - - if (CPU_IS_060) { - /* set up ISP entry points */ - asmlinkage void unimp_vec(void) asm ("_060_isp_unimp"); - - vectors[VEC_UNIMPII] = unimp_vec; - } - - vectors[VEC_BUSERR] = buserr; - vectors[VEC_ILLEGAL] = trap; - vectors[VEC_SYS] = system_call; -} - -void __init trap_init (void) -{ - int i; - - for (i = VEC_SPUR; i <= VEC_INT7; i++) - vectors[i] = bad_inthandler; - - for (i = 0; i < VEC_USER; i++) - if (!vectors[i]) - vectors[i] = trap; - - for (i = VEC_USER; i < 256; i++) - vectors[i] = bad_inthandler; - -#ifdef CONFIG_M68KFPU_EMU - if (FPU_IS_EMU) - vectors[VEC_LINE11] = fpu_emu; -#endif - - if (CPU_IS_040 && !FPU_IS_EMU) { - /* set up FPSP entry points */ - asmlinkage void dz_vec(void) asm ("dz"); - asmlinkage void inex_vec(void) asm ("inex"); - asmlinkage void ovfl_vec(void) asm ("ovfl"); - asmlinkage void unfl_vec(void) asm ("unfl"); - asmlinkage void snan_vec(void) asm ("snan"); - asmlinkage void operr_vec(void) asm ("operr"); - asmlinkage void bsun_vec(void) asm ("bsun"); - asmlinkage void fline_vec(void) asm ("fline"); - asmlinkage void unsupp_vec(void) asm ("unsupp"); - - vectors[VEC_FPDIVZ] = dz_vec; - vectors[VEC_FPIR] = inex_vec; - vectors[VEC_FPOVER] = ovfl_vec; - vectors[VEC_FPUNDER] = unfl_vec; - vectors[VEC_FPNAN] = snan_vec; - vectors[VEC_FPOE] = operr_vec; - vectors[VEC_FPBRUC] = bsun_vec; - vectors[VEC_LINE11] = fline_vec; - vectors[VEC_FPUNSUP] = unsupp_vec; - } - - if (CPU_IS_060 && !FPU_IS_EMU) { - /* set up IFPSP entry points */ - asmlinkage void snan_vec6(void) asm ("_060_fpsp_snan"); - asmlinkage void operr_vec6(void) asm ("_060_fpsp_operr"); - asmlinkage void ovfl_vec6(void) asm ("_060_fpsp_ovfl"); - asmlinkage void unfl_vec6(void) asm ("_060_fpsp_unfl"); - asmlinkage void dz_vec6(void) asm ("_060_fpsp_dz"); - asmlinkage void inex_vec6(void) asm ("_060_fpsp_inex"); - asmlinkage void fline_vec6(void) asm ("_060_fpsp_fline"); - asmlinkage void unsupp_vec6(void) asm ("_060_fpsp_unsupp"); - asmlinkage void effadd_vec6(void) asm ("_060_fpsp_effadd"); - - vectors[VEC_FPNAN] = snan_vec6; - vectors[VEC_FPOE] = operr_vec6; - vectors[VEC_FPOVER] = ovfl_vec6; - vectors[VEC_FPUNDER] = unfl_vec6; - vectors[VEC_FPDIVZ] = dz_vec6; - vectors[VEC_FPIR] = inex_vec6; - vectors[VEC_LINE11] = fline_vec6; - vectors[VEC_FPUNSUP] = unsupp_vec6; - vectors[VEC_UNIMPEA] = effadd_vec6; - } - - /* if running on an amiga, make the NMI interrupt do nothing */ - if (MACH_IS_AMIGA) { - vectors[VEC_INT7] = nmihandler; - } -} - - -static const char *vec_names[] = { - [VEC_RESETSP] = "RESET SP", - [VEC_RESETPC] = "RESET PC", - [VEC_BUSERR] = "BUS ERROR", - [VEC_ADDRERR] = "ADDRESS ERROR", - [VEC_ILLEGAL] = "ILLEGAL INSTRUCTION", - [VEC_ZERODIV] = "ZERO DIVIDE", - [VEC_CHK] = "CHK", - [VEC_TRAP] = "TRAPcc", - [VEC_PRIV] = "PRIVILEGE VIOLATION", - [VEC_TRACE] = "TRACE", - [VEC_LINE10] = "LINE 1010", - [VEC_LINE11] = "LINE 1111", - [VEC_RESV12] = "UNASSIGNED RESERVED 12", - [VEC_COPROC] = "COPROCESSOR PROTOCOL VIOLATION", - [VEC_FORMAT] = "FORMAT ERROR", - [VEC_UNINT] = "UNINITIALIZED INTERRUPT", - [VEC_RESV16] = "UNASSIGNED RESERVED 16", - [VEC_RESV17] = "UNASSIGNED RESERVED 17", - [VEC_RESV18] = "UNASSIGNED RESERVED 18", - [VEC_RESV19] = "UNASSIGNED RESERVED 19", - [VEC_RESV20] = "UNASSIGNED RESERVED 20", - [VEC_RESV21] = "UNASSIGNED RESERVED 21", - [VEC_RESV22] = "UNASSIGNED RESERVED 22", - [VEC_RESV23] = "UNASSIGNED RESERVED 23", - [VEC_SPUR] = "SPURIOUS INTERRUPT", - [VEC_INT1] = "LEVEL 1 INT", - [VEC_INT2] = "LEVEL 2 INT", - [VEC_INT3] = "LEVEL 3 INT", - [VEC_INT4] = "LEVEL 4 INT", - [VEC_INT5] = "LEVEL 5 INT", - [VEC_INT6] = "LEVEL 6 INT", - [VEC_INT7] = "LEVEL 7 INT", - [VEC_SYS] = "SYSCALL", - [VEC_TRAP1] = "TRAP #1", - [VEC_TRAP2] = "TRAP #2", - [VEC_TRAP3] = "TRAP #3", - [VEC_TRAP4] = "TRAP #4", - [VEC_TRAP5] = "TRAP #5", - [VEC_TRAP6] = "TRAP #6", - [VEC_TRAP7] = "TRAP #7", - [VEC_TRAP8] = "TRAP #8", - [VEC_TRAP9] = "TRAP #9", - [VEC_TRAP10] = "TRAP #10", - [VEC_TRAP11] = "TRAP #11", - [VEC_TRAP12] = "TRAP #12", - [VEC_TRAP13] = "TRAP #13", - [VEC_TRAP14] = "TRAP #14", - [VEC_TRAP15] = "TRAP #15", - [VEC_FPBRUC] = "FPCP BSUN", - [VEC_FPIR] = "FPCP INEXACT", - [VEC_FPDIVZ] = "FPCP DIV BY 0", - [VEC_FPUNDER] = "FPCP UNDERFLOW", - [VEC_FPOE] = "FPCP OPERAND ERROR", - [VEC_FPOVER] = "FPCP OVERFLOW", - [VEC_FPNAN] = "FPCP SNAN", - [VEC_FPUNSUP] = "FPCP UNSUPPORTED OPERATION", - [VEC_MMUCFG] = "MMU CONFIGURATION ERROR", - [VEC_MMUILL] = "MMU ILLEGAL OPERATION ERROR", - [VEC_MMUACC] = "MMU ACCESS LEVEL VIOLATION ERROR", - [VEC_RESV59] = "UNASSIGNED RESERVED 59", - [VEC_UNIMPEA] = "UNASSIGNED RESERVED 60", - [VEC_UNIMPII] = "UNASSIGNED RESERVED 61", - [VEC_RESV62] = "UNASSIGNED RESERVED 62", - [VEC_RESV63] = "UNASSIGNED RESERVED 63", -}; - -static const char *space_names[] = { - [0] = "Space 0", - [USER_DATA] = "User Data", - [USER_PROGRAM] = "User Program", -#ifndef CONFIG_SUN3 - [3] = "Space 3", +#ifdef CONFIG_MMU +#include "traps_mm.c" #else - [FC_CONTROL] = "Control", -#endif - [4] = "Space 4", - [SUPER_DATA] = "Super Data", - [SUPER_PROGRAM] = "Super Program", - [CPU_SPACE] = "CPU" -}; - -void die_if_kernel(char *,struct pt_regs *,int); -asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address, - unsigned long error_code); -int send_fault_sig(struct pt_regs *regs); - -asmlinkage void trap_c(struct frame *fp); - -#if defined (CONFIG_M68060) -static inline void access_error060 (struct frame *fp) -{ - unsigned long fslw = fp->un.fmt4.pc; /* is really FSLW for access error */ - -#ifdef DEBUG - printk("fslw=%#lx, fa=%#lx\n", fslw, fp->un.fmt4.effaddr); -#endif - - if (fslw & MMU060_BPE) { - /* branch prediction error -> clear branch cache */ - __asm__ __volatile__ ("movec %/cacr,%/d0\n\t" - "orl #0x00400000,%/d0\n\t" - "movec %/d0,%/cacr" - : : : "d0" ); - /* return if there's no other error */ - if (!(fslw & MMU060_ERR_BITS) && !(fslw & MMU060_SEE)) - return; - } - - if (fslw & (MMU060_DESC_ERR | MMU060_WP | MMU060_SP)) { - unsigned long errorcode; - unsigned long addr = fp->un.fmt4.effaddr; - - if (fslw & MMU060_MA) - addr = (addr + PAGE_SIZE - 1) & PAGE_MASK; - - errorcode = 1; - if (fslw & MMU060_DESC_ERR) { - __flush_tlb040_one(addr); - errorcode = 0; - } - if (fslw & MMU060_W) - errorcode |= 2; -#ifdef DEBUG - printk("errorcode = %d\n", errorcode ); -#endif - do_page_fault(&fp->ptregs, addr, errorcode); - } else if (fslw & (MMU060_SEE)){ - /* Software Emulation Error. - * fault during mem_read/mem_write in ifpsp060/os.S - */ - send_fault_sig(&fp->ptregs); - } else if (!(fslw & (MMU060_RE|MMU060_WE)) || - send_fault_sig(&fp->ptregs) > 0) { - printk("pc=%#lx, fa=%#lx\n", fp->ptregs.pc, fp->un.fmt4.effaddr); - printk( "68060 access error, fslw=%lx\n", fslw ); - trap_c( fp ); - } -} -#endif /* CONFIG_M68060 */ - -#if defined (CONFIG_M68040) -static inline unsigned long probe040(int iswrite, unsigned long addr, int wbs) -{ - unsigned long mmusr; - mm_segment_t old_fs = get_fs(); - - set_fs(MAKE_MM_SEG(wbs)); - - if (iswrite) - asm volatile (".chip 68040; ptestw (%0); .chip 68k" : : "a" (addr)); - else - asm volatile (".chip 68040; ptestr (%0); .chip 68k" : : "a" (addr)); - - asm volatile (".chip 68040; movec %%mmusr,%0; .chip 68k" : "=r" (mmusr)); - - set_fs(old_fs); - - return mmusr; -} - -static inline int do_040writeback1(unsigned short wbs, unsigned long wba, - unsigned long wbd) -{ - int res = 0; - mm_segment_t old_fs = get_fs(); - - /* set_fs can not be moved, otherwise put_user() may oops */ - set_fs(MAKE_MM_SEG(wbs)); - - switch (wbs & WBSIZ_040) { - case BA_SIZE_BYTE: - res = put_user(wbd & 0xff, (char __user *)wba); - break; - case BA_SIZE_WORD: - res = put_user(wbd & 0xffff, (short __user *)wba); - break; - case BA_SIZE_LONG: - res = put_user(wbd, (int __user *)wba); - break; - } - - /* set_fs can not be moved, otherwise put_user() may oops */ - set_fs(old_fs); - - -#ifdef DEBUG - printk("do_040writeback1, res=%d\n",res); -#endif - - return res; -} - -/* after an exception in a writeback the stack frame corresponding - * to that exception is discarded, set a few bits in the old frame - * to simulate what it should look like - */ -static inline void fix_xframe040(struct frame *fp, unsigned long wba, unsigned short wbs) -{ - fp->un.fmt7.faddr = wba; - fp->un.fmt7.ssw = wbs & 0xff; - if (wba != current->thread.faddr) - fp->un.fmt7.ssw |= MA_040; -} - -static inline void do_040writebacks(struct frame *fp) -{ - int res = 0; -#if 0 - if (fp->un.fmt7.wb1s & WBV_040) - printk("access_error040: cannot handle 1st writeback. oops.\n"); -#endif - - if ((fp->un.fmt7.wb2s & WBV_040) && - !(fp->un.fmt7.wb2s & WBTT_040)) { - res = do_040writeback1(fp->un.fmt7.wb2s, fp->un.fmt7.wb2a, - fp->un.fmt7.wb2d); - if (res) - fix_xframe040(fp, fp->un.fmt7.wb2a, fp->un.fmt7.wb2s); - else - fp->un.fmt7.wb2s = 0; - } - - /* do the 2nd wb only if the first one was successful (except for a kernel wb) */ - if (fp->un.fmt7.wb3s & WBV_040 && (!res || fp->un.fmt7.wb3s & 4)) { - res = do_040writeback1(fp->un.fmt7.wb3s, fp->un.fmt7.wb3a, - fp->un.fmt7.wb3d); - if (res) - { - fix_xframe040(fp, fp->un.fmt7.wb3a, fp->un.fmt7.wb3s); - - fp->un.fmt7.wb2s = fp->un.fmt7.wb3s; - fp->un.fmt7.wb3s &= (~WBV_040); - fp->un.fmt7.wb2a = fp->un.fmt7.wb3a; - fp->un.fmt7.wb2d = fp->un.fmt7.wb3d; - } - else - fp->un.fmt7.wb3s = 0; - } - - if (res) - send_fault_sig(&fp->ptregs); -} - -/* - * called from sigreturn(), must ensure userspace code didn't - * manipulate exception frame to circumvent protection, then complete - * pending writebacks - * we just clear TM2 to turn it into a userspace access - */ -asmlinkage void berr_040cleanup(struct frame *fp) -{ - fp->un.fmt7.wb2s &= ~4; - fp->un.fmt7.wb3s &= ~4; - - do_040writebacks(fp); -} - -static inline void access_error040(struct frame *fp) -{ - unsigned short ssw = fp->un.fmt7.ssw; - unsigned long mmusr; - -#ifdef DEBUG - printk("ssw=%#x, fa=%#lx\n", ssw, fp->un.fmt7.faddr); - printk("wb1s=%#x, wb2s=%#x, wb3s=%#x\n", fp->un.fmt7.wb1s, - fp->un.fmt7.wb2s, fp->un.fmt7.wb3s); - printk ("wb2a=%lx, wb3a=%lx, wb2d=%lx, wb3d=%lx\n", - fp->un.fmt7.wb2a, fp->un.fmt7.wb3a, - fp->un.fmt7.wb2d, fp->un.fmt7.wb3d); -#endif - - if (ssw & ATC_040) { - unsigned long addr = fp->un.fmt7.faddr; - unsigned long errorcode; - - /* - * The MMU status has to be determined AFTER the address - * has been corrected if there was a misaligned access (MA). - */ - if (ssw & MA_040) - addr = (addr + 7) & -8; - - /* MMU error, get the MMUSR info for this access */ - mmusr = probe040(!(ssw & RW_040), addr, ssw); -#ifdef DEBUG - printk("mmusr = %lx\n", mmusr); -#endif - errorcode = 1; - if (!(mmusr & MMU_R_040)) { - /* clear the invalid atc entry */ - __flush_tlb040_one(addr); - errorcode = 0; - } - - /* despite what documentation seems to say, RMW - * accesses have always both the LK and RW bits set */ - if (!(ssw & RW_040) || (ssw & LK_040)) - errorcode |= 2; - - if (do_page_fault(&fp->ptregs, addr, errorcode)) { -#ifdef DEBUG - printk("do_page_fault() !=0\n"); -#endif - if (user_mode(&fp->ptregs)){ - /* delay writebacks after signal delivery */ -#ifdef DEBUG - printk(".. was usermode - return\n"); -#endif - return; - } - /* disable writeback into user space from kernel - * (if do_page_fault didn't fix the mapping, - * the writeback won't do good) - */ -disable_wb: -#ifdef DEBUG - printk(".. disabling wb2\n"); -#endif - if (fp->un.fmt7.wb2a == fp->un.fmt7.faddr) - fp->un.fmt7.wb2s &= ~WBV_040; - if (fp->un.fmt7.wb3a == fp->un.fmt7.faddr) - fp->un.fmt7.wb3s &= ~WBV_040; - } - } else { - /* In case of a bus error we either kill the process or expect - * the kernel to catch the fault, which then is also responsible - * for cleaning up the mess. - */ - current->thread.signo = SIGBUS; - current->thread.faddr = fp->un.fmt7.faddr; - if (send_fault_sig(&fp->ptregs) >= 0) - printk("68040 bus error (ssw=%x, faddr=%lx)\n", ssw, - fp->un.fmt7.faddr); - goto disable_wb; - } - - do_040writebacks(fp); -} -#endif /* CONFIG_M68040 */ - -#if defined(CONFIG_SUN3) -#include <asm/sun3mmu.h> - -extern int mmu_emu_handle_fault (unsigned long, int, int); - -/* sun3 version of bus_error030 */ - -static inline void bus_error030 (struct frame *fp) -{ - unsigned char buserr_type = sun3_get_buserr (); - unsigned long addr, errorcode; - unsigned short ssw = fp->un.fmtb.ssw; - extern unsigned long _sun3_map_test_start, _sun3_map_test_end; - -#ifdef DEBUG - if (ssw & (FC | FB)) - printk ("Instruction fault at %#010lx\n", - ssw & FC ? - fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2 - : - fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr); - if (ssw & DF) - printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n", - ssw & RW ? "read" : "write", - fp->un.fmtb.daddr, - space_names[ssw & DFC], fp->ptregs.pc); -#endif - - /* - * Check if this page should be demand-mapped. This needs to go before - * the testing for a bad kernel-space access (demand-mapping applies - * to kernel accesses too). - */ - - if ((ssw & DF) - && (buserr_type & (SUN3_BUSERR_PROTERR | SUN3_BUSERR_INVALID))) { - if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 0)) - return; - } - - /* Check for kernel-space pagefault (BAD). */ - if (fp->ptregs.sr & PS_S) { - /* kernel fault must be a data fault to user space */ - if (! ((ssw & DF) && ((ssw & DFC) == USER_DATA))) { - // try checking the kernel mappings before surrender - if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 1)) - return; - /* instruction fault or kernel data fault! */ - if (ssw & (FC | FB)) - printk ("Instruction fault at %#010lx\n", - fp->ptregs.pc); - if (ssw & DF) { - /* was this fault incurred testing bus mappings? */ - if((fp->ptregs.pc >= (unsigned long)&_sun3_map_test_start) && - (fp->ptregs.pc <= (unsigned long)&_sun3_map_test_end)) { - send_fault_sig(&fp->ptregs); - return; - } - - printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n", - ssw & RW ? "read" : "write", - fp->un.fmtb.daddr, - space_names[ssw & DFC], fp->ptregs.pc); - } - printk ("BAD KERNEL BUSERR\n"); - - die_if_kernel("Oops", &fp->ptregs,0); - force_sig(SIGKILL, current); - return; - } - } else { - /* user fault */ - if (!(ssw & (FC | FB)) && !(ssw & DF)) - /* not an instruction fault or data fault! BAD */ - panic ("USER BUSERR w/o instruction or data fault"); - } - - - /* First handle the data fault, if any. */ - if (ssw & DF) { - addr = fp->un.fmtb.daddr; - -// errorcode bit 0: 0 -> no page 1 -> protection fault -// errorcode bit 1: 0 -> read fault 1 -> write fault - -// (buserr_type & SUN3_BUSERR_PROTERR) -> protection fault -// (buserr_type & SUN3_BUSERR_INVALID) -> invalid page fault - - if (buserr_type & SUN3_BUSERR_PROTERR) - errorcode = 0x01; - else if (buserr_type & SUN3_BUSERR_INVALID) - errorcode = 0x00; - else { -#ifdef DEBUG - printk ("*** unexpected busfault type=%#04x\n", buserr_type); - printk ("invalid %s access at %#lx from pc %#lx\n", - !(ssw & RW) ? "write" : "read", addr, - fp->ptregs.pc); -#endif - die_if_kernel ("Oops", &fp->ptregs, buserr_type); - force_sig (SIGBUS, current); - return; - } - -//todo: wtf is RM bit? --m - if (!(ssw & RW) || ssw & RM) - errorcode |= 0x02; - - /* Handle page fault. */ - do_page_fault (&fp->ptregs, addr, errorcode); - - /* Retry the data fault now. */ - return; - } - - /* Now handle the instruction fault. */ - - /* Get the fault address. */ - if (fp->ptregs.format == 0xA) - addr = fp->ptregs.pc + 4; - else - addr = fp->un.fmtb.baddr; - if (ssw & FC) - addr -= 2; - - if (buserr_type & SUN3_BUSERR_INVALID) { - if (!mmu_emu_handle_fault (fp->un.fmtb.daddr, 1, 0)) - do_page_fault (&fp->ptregs, addr, 0); - } else { -#ifdef DEBUG - printk ("protection fault on insn access (segv).\n"); -#endif - force_sig (SIGSEGV, current); - } -} -#else -#if defined(CPU_M68020_OR_M68030) -static inline void bus_error030 (struct frame *fp) -{ - volatile unsigned short temp; - unsigned short mmusr; - unsigned long addr, errorcode; - unsigned short ssw = fp->un.fmtb.ssw; -#ifdef DEBUG - unsigned long desc; - - printk ("pid = %x ", current->pid); - printk ("SSW=%#06x ", ssw); - - if (ssw & (FC | FB)) - printk ("Instruction fault at %#010lx\n", - ssw & FC ? - fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2 - : - fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr); - if (ssw & DF) - printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n", - ssw & RW ? "read" : "write", - fp->un.fmtb.daddr, - space_names[ssw & DFC], fp->ptregs.pc); -#endif - - /* ++andreas: If a data fault and an instruction fault happen - at the same time map in both pages. */ - - /* First handle the data fault, if any. */ - if (ssw & DF) { - addr = fp->un.fmtb.daddr; - -#ifdef DEBUG - asm volatile ("ptestr %3,%2@,#7,%0\n\t" - "pmove %%psr,%1@" - : "=a&" (desc) - : "a" (&temp), "a" (addr), "d" (ssw)); -#else - asm volatile ("ptestr %2,%1@,#7\n\t" - "pmove %%psr,%0@" - : : "a" (&temp), "a" (addr), "d" (ssw)); -#endif - mmusr = temp; - -#ifdef DEBUG - printk("mmusr is %#x for addr %#lx in task %p\n", - mmusr, addr, current); - printk("descriptor address is %#lx, contents %#lx\n", - __va(desc), *(unsigned long *)__va(desc)); -#endif - - errorcode = (mmusr & MMU_I) ? 0 : 1; - if (!(ssw & RW) || (ssw & RM)) - errorcode |= 2; - - if (mmusr & (MMU_I | MMU_WP)) { - if (ssw & 4) { - printk("Data %s fault at %#010lx in %s (pc=%#lx)\n", - ssw & RW ? "read" : "write", - fp->un.fmtb.daddr, - space_names[ssw & DFC], fp->ptregs.pc); - goto buserr; - } - /* Don't try to do anything further if an exception was - handled. */ - if (do_page_fault (&fp->ptregs, addr, errorcode) < 0) - return; - } else if (!(mmusr & MMU_I)) { - /* probably a 020 cas fault */ - if (!(ssw & RM) && send_fault_sig(&fp->ptregs) > 0) - printk("unexpected bus error (%#x,%#x)\n", ssw, mmusr); - } else if (mmusr & (MMU_B|MMU_L|MMU_S)) { - printk("invalid %s access at %#lx from pc %#lx\n", - !(ssw & RW) ? "write" : "read", addr, - fp->ptregs.pc); - die_if_kernel("Oops",&fp->ptregs,mmusr); - force_sig(SIGSEGV, current); - return; - } else { -#if 0 - static volatile long tlong; -#endif - - printk("weird %s access at %#lx from pc %#lx (ssw is %#x)\n", - !(ssw & RW) ? "write" : "read", addr, - fp->ptregs.pc, ssw); - asm volatile ("ptestr #1,%1@,#0\n\t" - "pmove %%psr,%0@" - : /* no outputs */ - : "a" (&temp), "a" (addr)); - mmusr = temp; - - printk ("level 0 mmusr is %#x\n", mmusr); -#if 0 - asm volatile ("pmove %%tt0,%0@" - : /* no outputs */ - : "a" (&tlong)); - printk("tt0 is %#lx, ", tlong); - asm volatile ("pmove %%tt1,%0@" - : /* no outputs */ - : "a" (&tlong)); - printk("tt1 is %#lx\n", tlong); -#endif -#ifdef DEBUG - printk("Unknown SIGSEGV - 1\n"); -#endif - die_if_kernel("Oops",&fp->ptregs,mmusr); - force_sig(SIGSEGV, current); - return; - } - - /* setup an ATC entry for the access about to be retried */ - if (!(ssw & RW) || (ssw & RM)) - asm volatile ("ploadw %1,%0@" : /* no outputs */ - : "a" (addr), "d" (ssw)); - else - asm volatile ("ploadr %1,%0@" : /* no outputs */ - : "a" (addr), "d" (ssw)); - } - - /* Now handle the instruction fault. */ - - if (!(ssw & (FC|FB))) - return; - - if (fp->ptregs.sr & PS_S) { - printk("Instruction fault at %#010lx\n", - fp->ptregs.pc); - buserr: - printk ("BAD KERNEL BUSERR\n"); - die_if_kernel("Oops",&fp->ptregs,0); - force_sig(SIGKILL, current); - return; - } - - /* get the fault address */ - if (fp->ptregs.format == 10) - addr = fp->ptregs.pc + 4; - else - addr = fp->un.fmtb.baddr; - if (ssw & FC) - addr -= 2; - - if ((ssw & DF) && ((addr ^ fp->un.fmtb.daddr) & PAGE_MASK) == 0) - /* Insn fault on same page as data fault. But we - should still create the ATC entry. */ - goto create_atc_entry; - -#ifdef DEBUG - asm volatile ("ptestr #1,%2@,#7,%0\n\t" - "pmove %%psr,%1@" - : "=a&" (desc) - : "a" (&temp), "a" (addr)); -#else - asm volatile ("ptestr #1,%1@,#7\n\t" - "pmove %%psr,%0@" - : : "a" (&temp), "a" (addr)); -#endif - mmusr = temp; - -#ifdef DEBUG - printk ("mmusr is %#x for addr %#lx in task %p\n", - mmusr, addr, current); - printk ("descriptor address is %#lx, contents %#lx\n", - __va(desc), *(unsigned long *)__va(desc)); -#endif - - if (mmusr & MMU_I) - do_page_fault (&fp->ptregs, addr, 0); - else if (mmusr & (MMU_B|MMU_L|MMU_S)) { - printk ("invalid insn access at %#lx from pc %#lx\n", - addr, fp->ptregs.pc); -#ifdef DEBUG - printk("Unknown SIGSEGV - 2\n"); -#endif - die_if_kernel("Oops",&fp->ptregs,mmusr); - force_sig(SIGSEGV, current); - return; - } - -create_atc_entry: - /* setup an ATC entry for the access about to be retried */ - asm volatile ("ploadr #2,%0@" : /* no outputs */ - : "a" (addr)); -} -#endif /* CPU_M68020_OR_M68030 */ -#endif /* !CONFIG_SUN3 */ - -asmlinkage void buserr_c(struct frame *fp) -{ - /* Only set esp0 if coming from user mode */ - if (user_mode(&fp->ptregs)) - current->thread.esp0 = (unsigned long) fp; - -#ifdef DEBUG - printk ("*** Bus Error *** Format is %x\n", fp->ptregs.format); -#endif - - switch (fp->ptregs.format) { -#if defined (CONFIG_M68060) - case 4: /* 68060 access error */ - access_error060 (fp); - break; -#endif -#if defined (CONFIG_M68040) - case 0x7: /* 68040 access error */ - access_error040 (fp); - break; -#endif -#if defined (CPU_M68020_OR_M68030) - case 0xa: - case 0xb: - bus_error030 (fp); - break; -#endif - default: - die_if_kernel("bad frame format",&fp->ptregs,0); -#ifdef DEBUG - printk("Unknown SIGSEGV - 4\n"); -#endif - force_sig(SIGSEGV, current); - } -} - - -static int kstack_depth_to_print = 48; - -void show_trace(unsigned long *stack) -{ - unsigned long *endstack; - unsigned long addr; - int i; - - printk("Call Trace:"); - addr = (unsigned long)stack + THREAD_SIZE - 1; - endstack = (unsigned long *)(addr & -THREAD_SIZE); - i = 0; - while (stack + 1 <= endstack) { - addr = *stack++; - /* - * If the address is either in the text segment of the - * kernel, or in the region which contains vmalloc'ed - * memory, it *may* be the address of a calling - * routine; if so, print it so that someone tracing - * down the cause of the crash will be able to figure - * out the call path that was taken. - */ - if (__kernel_text_address(addr)) { -#ifndef CONFIG_KALLSYMS - if (i % 5 == 0) - printk("\n "); -#endif - printk(" [<%08lx>] %pS\n", addr, (void *)addr); - i++; - } - } - printk("\n"); -} - -void show_registers(struct pt_regs *regs) -{ - struct frame *fp = (struct frame *)regs; - mm_segment_t old_fs = get_fs(); - u16 c, *cp; - unsigned long addr; - int i; - - print_modules(); - printk("PC: [<%08lx>] %pS\n", regs->pc, (void *)regs->pc); - printk("SR: %04x SP: %p a2: %08lx\n", regs->sr, regs, regs->a2); - printk("d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n", - regs->d0, regs->d1, regs->d2, regs->d3); - printk("d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n", - regs->d4, regs->d5, regs->a0, regs->a1); - - printk("Process %s (pid: %d, task=%p)\n", - current->comm, task_pid_nr(current), current); - addr = (unsigned long)&fp->un; - printk("Frame format=%X ", regs->format); - switch (regs->format) { - case 0x2: - printk("instr addr=%08lx\n", fp->un.fmt2.iaddr); - addr += sizeof(fp->un.fmt2); - break; - case 0x3: - printk("eff addr=%08lx\n", fp->un.fmt3.effaddr); - addr += sizeof(fp->un.fmt3); - break; - case 0x4: - printk((CPU_IS_060 ? "fault addr=%08lx fslw=%08lx\n" - : "eff addr=%08lx pc=%08lx\n"), - fp->un.fmt4.effaddr, fp->un.fmt4.pc); - addr += sizeof(fp->un.fmt4); - break; - case 0x7: - printk("eff addr=%08lx ssw=%04x faddr=%08lx\n", - fp->un.fmt7.effaddr, fp->un.fmt7.ssw, fp->un.fmt7.faddr); - printk("wb 1 stat/addr/data: %04x %08lx %08lx\n", - fp->un.fmt7.wb1s, fp->un.fmt7.wb1a, fp->un.fmt7.wb1dpd0); - printk("wb 2 stat/addr/data: %04x %08lx %08lx\n", - fp->un.fmt7.wb2s, fp->un.fmt7.wb2a, fp->un.fmt7.wb2d); - printk("wb 3 stat/addr/data: %04x %08lx %08lx\n", - fp->un.fmt7.wb3s, fp->un.fmt7.wb3a, fp->un.fmt7.wb3d); - printk("push data: %08lx %08lx %08lx %08lx\n", - fp->un.fmt7.wb1dpd0, fp->un.fmt7.pd1, fp->un.fmt7.pd2, - fp->un.fmt7.pd3); - addr += sizeof(fp->un.fmt7); - break; - case 0x9: - printk("instr addr=%08lx\n", fp->un.fmt9.iaddr); - addr += sizeof(fp->un.fmt9); - break; - case 0xa: - printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n", - fp->un.fmta.ssw, fp->un.fmta.isc, fp->un.fmta.isb, - fp->un.fmta.daddr, fp->un.fmta.dobuf); - addr += sizeof(fp->un.fmta); - break; - case 0xb: - printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n", - fp->un.fmtb.ssw, fp->un.fmtb.isc, fp->un.fmtb.isb, - fp->un.fmtb.daddr, fp->un.fmtb.dobuf); - printk("baddr=%08lx dibuf=%08lx ver=%x\n", - fp->un.fmtb.baddr, fp->un.fmtb.dibuf, fp->un.fmtb.ver); - addr += sizeof(fp->un.fmtb); - break; - default: - printk("\n"); - } - show_stack(NULL, (unsigned long *)addr); - - printk("Code:"); - set_fs(KERNEL_DS); - cp = (u16 *)regs->pc; - for (i = -8; i < 16; i++) { - if (get_user(c, cp + i) && i >= 0) { - printk(" Bad PC value."); - break; - } - printk(i ? " %04x" : " <%04x>", c); - } - set_fs(old_fs); - printk ("\n"); -} - -void show_stack(struct task_struct *task, unsigned long *stack) -{ - unsigned long *p; - unsigned long *endstack; - int i; - - if (!stack) { - if (task) - stack = (unsigned long *)task->thread.esp0; - else - stack = (unsigned long *)&stack; - } - endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE); - - printk("Stack from %08lx:", (unsigned long)stack); - p = stack; - for (i = 0; i < kstack_depth_to_print; i++) { - if (p + 1 > endstack) - break; - if (i % 8 == 0) - printk("\n "); - printk(" %08lx", *p++); - } - printk("\n"); - show_trace(stack); -} - -/* - * The architecture-independent backtrace generator - */ -void dump_stack(void) -{ - unsigned long stack; - - show_trace(&stack); -} - -EXPORT_SYMBOL(dump_stack); - -void bad_super_trap (struct frame *fp) -{ - console_verbose(); - if (fp->ptregs.vector < 4 * ARRAY_SIZE(vec_names)) - printk ("*** %s *** FORMAT=%X\n", - vec_names[(fp->ptregs.vector) >> 2], - fp->ptregs.format); - else - printk ("*** Exception %d *** FORMAT=%X\n", - (fp->ptregs.vector) >> 2, - fp->ptregs.format); - if (fp->ptregs.vector >> 2 == VEC_ADDRERR && CPU_IS_020_OR_030) { - unsigned short ssw = fp->un.fmtb.ssw; - - printk ("SSW=%#06x ", ssw); - - if (ssw & RC) - printk ("Pipe stage C instruction fault at %#010lx\n", - (fp->ptregs.format) == 0xA ? - fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2); - if (ssw & RB) - printk ("Pipe stage B instruction fault at %#010lx\n", - (fp->ptregs.format) == 0xA ? - fp->ptregs.pc + 4 : fp->un.fmtb.baddr); - if (ssw & DF) - printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n", - ssw & RW ? "read" : "write", - fp->un.fmtb.daddr, space_names[ssw & DFC], - fp->ptregs.pc); - } - printk ("Current process id is %d\n", task_pid_nr(current)); - die_if_kernel("BAD KERNEL TRAP", &fp->ptregs, 0); -} - -asmlinkage void trap_c(struct frame *fp) -{ - int sig; - siginfo_t info; - - if (fp->ptregs.sr & PS_S) { - if (fp->ptregs.vector == VEC_TRACE << 2) { - /* traced a trapping instruction on a 68020/30, - * real exception will be executed afterwards. - */ - } else if (!handle_kernel_fault(&fp->ptregs)) - bad_super_trap(fp); - return; - } - - /* send the appropriate signal to the user program */ - switch ((fp->ptregs.vector) >> 2) { - case VEC_ADDRERR: - info.si_code = BUS_ADRALN; - sig = SIGBUS; - break; - case VEC_ILLEGAL: - case VEC_LINE10: - case VEC_LINE11: - info.si_code = ILL_ILLOPC; - sig = SIGILL; - break; - case VEC_PRIV: - info.si_code = ILL_PRVOPC; - sig = SIGILL; - break; - case VEC_COPROC: - info.si_code = ILL_COPROC; - sig = SIGILL; - break; - case VEC_TRAP1: - case VEC_TRAP2: - case VEC_TRAP3: - case VEC_TRAP4: - case VEC_TRAP5: - case VEC_TRAP6: - case VEC_TRAP7: - case VEC_TRAP8: - case VEC_TRAP9: - case VEC_TRAP10: - case VEC_TRAP11: - case VEC_TRAP12: - case VEC_TRAP13: - case VEC_TRAP14: - info.si_code = ILL_ILLTRP; - sig = SIGILL; - break; - case VEC_FPBRUC: - case VEC_FPOE: - case VEC_FPNAN: - info.si_code = FPE_FLTINV; - sig = SIGFPE; - break; - case VEC_FPIR: - info.si_code = FPE_FLTRES; - sig = SIGFPE; - break; - case VEC_FPDIVZ: - info.si_code = FPE_FLTDIV; - sig = SIGFPE; - break; - case VEC_FPUNDER: - info.si_code = FPE_FLTUND; - sig = SIGFPE; - break; - case VEC_FPOVER: - info.si_code = FPE_FLTOVF; - sig = SIGFPE; - break; - case VEC_ZERODIV: - info.si_code = FPE_INTDIV; - sig = SIGFPE; - break; - case VEC_CHK: - case VEC_TRAP: - info.si_code = FPE_INTOVF; - sig = SIGFPE; - break; - case VEC_TRACE: /* ptrace single step */ - info.si_code = TRAP_TRACE; - sig = SIGTRAP; - break; - case VEC_TRAP15: /* breakpoint */ - info.si_code = TRAP_BRKPT; - sig = SIGTRAP; - break; - default: - info.si_code = ILL_ILLOPC; - sig = SIGILL; - break; - } - info.si_signo = sig; - info.si_errno = 0; - switch (fp->ptregs.format) { - default: - info.si_addr = (void *) fp->ptregs.pc; - break; - case 2: - info.si_addr = (void *) fp->un.fmt2.iaddr; - break; - case 7: - info.si_addr = (void *) fp->un.fmt7.effaddr; - break; - case 9: - info.si_addr = (void *) fp->un.fmt9.iaddr; - break; - case 10: - info.si_addr = (void *) fp->un.fmta.daddr; - break; - case 11: - info.si_addr = (void *) fp->un.fmtb.daddr; - break; - } - force_sig_info (sig, &info, current); -} - -void die_if_kernel (char *str, struct pt_regs *fp, int nr) -{ - if (!(fp->sr & PS_S)) - return; - - console_verbose(); - printk("%s: %08x\n",str,nr); - show_registers(fp); - add_taint(TAINT_DIE); - do_exit(SIGSEGV); -} - -/* - * This function is called if an error occur while accessing - * user-space from the fpsp040 code. - */ -asmlinkage void fpsp040_die(void) -{ - do_exit(SIGSEGV); -} - -#ifdef CONFIG_M68KFPU_EMU -asmlinkage void fpemu_signal(int signal, int code, void *addr) -{ - siginfo_t info; - - info.si_signo = signal; - info.si_errno = 0; - info.si_code = code; - info.si_addr = addr; - force_sig_info(signal, &info, current); -} +#include "traps_no.c" #endif diff --git a/arch/m68k/kernel/traps_mm.c b/arch/m68k/kernel/traps_mm.c new file mode 100644 index 0000000..4022bbc --- /dev/null +++ b/arch/m68k/kernel/traps_mm.c @@ -0,0 +1,1207 @@ +/* + * linux/arch/m68k/kernel/traps.c + * + * Copyright (C) 1993, 1994 by Hamish Macdonald + * + * 68040 fixes by Michael Rausch + * 68040 fixes by Martin Apel + * 68040 fixes and writeback by Richard Zidlicky + * 68060 fixes by Roman Hodek + * 68060 fixes by Jesper Skov + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +/* + * Sets up all exception vectors + */ + +#include <linux/sched.h> +#include <linux/signal.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/user.h> +#include <linux/string.h> +#include <linux/linkage.h> +#include <linux/init.h> +#include <linux/ptrace.h> +#include <linux/kallsyms.h> + +#include <asm/setup.h> +#include <asm/fpu.h> +#include <asm/system.h> +#include <asm/uaccess.h> +#include <asm/traps.h> +#include <asm/pgalloc.h> +#include <asm/machdep.h> +#include <asm/siginfo.h> + +/* assembler routines */ +asmlinkage void system_call(void); +asmlinkage void buserr(void); +asmlinkage void trap(void); +asmlinkage void nmihandler(void); +#ifdef CONFIG_M68KFPU_EMU +asmlinkage void fpu_emu(void); +#endif + +e_vector vectors[256]; + +/* nmi handler for the Amiga */ +asm(".text\n" + __ALIGN_STR "\n" + "nmihandler: rte"); + +/* + * this must be called very early as the kernel might + * use some instruction that are emulated on the 060 + * and so we're prepared for early probe attempts (e.g. nf_init). + */ +void __init base_trap_init(void) +{ + if (MACH_IS_SUN3X) { + extern e_vector *sun3x_prom_vbr; + + __asm__ volatile ("movec %%vbr, %0" : "=r" (sun3x_prom_vbr)); + } + + /* setup the exception vector table */ + __asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)vectors)); + + if (CPU_IS_060) { + /* set up ISP entry points */ + asmlinkage void unimp_vec(void) asm ("_060_isp_unimp"); + + vectors[VEC_UNIMPII] = unimp_vec; + } + + vectors[VEC_BUSERR] = buserr; + vectors[VEC_ILLEGAL] = trap; + vectors[VEC_SYS] = system_call; +} + +void __init trap_init (void) +{ + int i; + + for (i = VEC_SPUR; i <= VEC_INT7; i++) + vectors[i] = bad_inthandler; + + for (i = 0; i < VEC_USER; i++) + if (!vectors[i]) + vectors[i] = trap; + + for (i = VEC_USER; i < 256; i++) + vectors[i] = bad_inthandler; + +#ifdef CONFIG_M68KFPU_EMU + if (FPU_IS_EMU) + vectors[VEC_LINE11] = fpu_emu; +#endif + + if (CPU_IS_040 && !FPU_IS_EMU) { + /* set up FPSP entry points */ + asmlinkage void dz_vec(void) asm ("dz"); + asmlinkage void inex_vec(void) asm ("inex"); + asmlinkage void ovfl_vec(void) asm ("ovfl"); + asmlinkage void unfl_vec(void) asm ("unfl"); + asmlinkage void snan_vec(void) asm ("snan"); + asmlinkage void operr_vec(void) asm ("operr"); + asmlinkage void bsun_vec(void) asm ("bsun"); + asmlinkage void fline_vec(void) asm ("fline"); + asmlinkage void unsupp_vec(void) asm ("unsupp"); + + vectors[VEC_FPDIVZ] = dz_vec; + vectors[VEC_FPIR] = inex_vec; + vectors[VEC_FPOVER] = ovfl_vec; + vectors[VEC_FPUNDER] = unfl_vec; + vectors[VEC_FPNAN] = snan_vec; + vectors[VEC_FPOE] = operr_vec; + vectors[VEC_FPBRUC] = bsun_vec; + vectors[VEC_LINE11] = fline_vec; + vectors[VEC_FPUNSUP] = unsupp_vec; + } + + if (CPU_IS_060 && !FPU_IS_EMU) { + /* set up IFPSP entry points */ + asmlinkage void snan_vec6(void) asm ("_060_fpsp_snan"); + asmlinkage void operr_vec6(void) asm ("_060_fpsp_operr"); + asmlinkage void ovfl_vec6(void) asm ("_060_fpsp_ovfl"); + asmlinkage void unfl_vec6(void) asm ("_060_fpsp_unfl"); + asmlinkage void dz_vec6(void) asm ("_060_fpsp_dz"); + asmlinkage void inex_vec6(void) asm ("_060_fpsp_inex"); + asmlinkage void fline_vec6(void) asm ("_060_fpsp_fline"); + asmlinkage void unsupp_vec6(void) asm ("_060_fpsp_unsupp"); + asmlinkage void effadd_vec6(void) asm ("_060_fpsp_effadd"); + + vectors[VEC_FPNAN] = snan_vec6; + vectors[VEC_FPOE] = operr_vec6; + vectors[VEC_FPOVER] = ovfl_vec6; + vectors[VEC_FPUNDER] = unfl_vec6; + vectors[VEC_FPDIVZ] = dz_vec6; + vectors[VEC_FPIR] = inex_vec6; + vectors[VEC_LINE11] = fline_vec6; + vectors[VEC_FPUNSUP] = unsupp_vec6; + vectors[VEC_UNIMPEA] = effadd_vec6; + } + + /* if running on an amiga, make the NMI interrupt do nothing */ + if (MACH_IS_AMIGA) { + vectors[VEC_INT7] = nmihandler; + } +} + + +static const char *vec_names[] = { + [VEC_RESETSP] = "RESET SP", + [VEC_RESETPC] = "RESET PC", + [VEC_BUSERR] = "BUS ERROR", + [VEC_ADDRERR] = "ADDRESS ERROR", + [VEC_ILLEGAL] = "ILLEGAL INSTRUCTION", + [VEC_ZERODIV] = "ZERO DIVIDE", + [VEC_CHK] = "CHK", + [VEC_TRAP] = "TRAPcc", + [VEC_PRIV] = "PRIVILEGE VIOLATION", + [VEC_TRACE] = "TRACE", + [VEC_LINE10] = "LINE 1010", + [VEC_LINE11] = "LINE 1111", + [VEC_RESV12] = "UNASSIGNED RESERVED 12", + [VEC_COPROC] = "COPROCESSOR PROTOCOL VIOLATION", + [VEC_FORMAT] = "FORMAT ERROR", + [VEC_UNINT] = "UNINITIALIZED INTERRUPT", + [VEC_RESV16] = "UNASSIGNED RESERVED 16", + [VEC_RESV17] = "UNASSIGNED RESERVED 17", + [VEC_RESV18] = "UNASSIGNED RESERVED 18", + [VEC_RESV19] = "UNASSIGNED RESERVED 19", + [VEC_RESV20] = "UNASSIGNED RESERVED 20", + [VEC_RESV21] = "UNASSIGNED RESERVED 21", + [VEC_RESV22] = "UNASSIGNED RESERVED 22", + [VEC_RESV23] = "UNASSIGNED RESERVED 23", + [VEC_SPUR] = "SPURIOUS INTERRUPT", + [VEC_INT1] = "LEVEL 1 INT", + [VEC_INT2] = "LEVEL 2 INT", + [VEC_INT3] = "LEVEL 3 INT", + [VEC_INT4] = "LEVEL 4 INT", + [VEC_INT5] = "LEVEL 5 INT", + [VEC_INT6] = "LEVEL 6 INT", + [VEC_INT7] = "LEVEL 7 INT", + [VEC_SYS] = "SYSCALL", + [VEC_TRAP1] = "TRAP #1", + [VEC_TRAP2] = "TRAP #2", + [VEC_TRAP3] = "TRAP #3", + [VEC_TRAP4] = "TRAP #4", + [VEC_TRAP5] = "TRAP #5", + [VEC_TRAP6] = "TRAP #6", + [VEC_TRAP7] = "TRAP #7", + [VEC_TRAP8] = "TRAP #8", + [VEC_TRAP9] = "TRAP #9", + [VEC_TRAP10] = "TRAP #10", + [VEC_TRAP11] = "TRAP #11", + [VEC_TRAP12] = "TRAP #12", + [VEC_TRAP13] = "TRAP #13", + [VEC_TRAP14] = "TRAP #14", + [VEC_TRAP15] = "TRAP #15", + [VEC_FPBRUC] = "FPCP BSUN", + [VEC_FPIR] = "FPCP INEXACT", + [VEC_FPDIVZ] = "FPCP DIV BY 0", + [VEC_FPUNDER] = "FPCP UNDERFLOW", + [VEC_FPOE] = "FPCP OPERAND ERROR", + [VEC_FPOVER] = "FPCP OVERFLOW", + [VEC_FPNAN] = "FPCP SNAN", + [VEC_FPUNSUP] = "FPCP UNSUPPORTED OPERATION", + [VEC_MMUCFG] = "MMU CONFIGURATION ERROR", + [VEC_MMUILL] = "MMU ILLEGAL OPERATION ERROR", + [VEC_MMUACC] = "MMU ACCESS LEVEL VIOLATION ERROR", + [VEC_RESV59] = "UNASSIGNED RESERVED 59", + [VEC_UNIMPEA] = "UNASSIGNED RESERVED 60", + [VEC_UNIMPII] = "UNASSIGNED RESERVED 61", + [VEC_RESV62] = "UNASSIGNED RESERVED 62", + [VEC_RESV63] = "UNASSIGNED RESERVED 63", +}; + +static const char *space_names[] = { + [0] = "Space 0", + [USER_DATA] = "User Data", + [USER_PROGRAM] = "User Program", +#ifndef CONFIG_SUN3 + [3] = "Space 3", +#else + [FC_CONTROL] = "Control", +#endif + [4] = "Space 4", + [SUPER_DATA] = "Super Data", + [SUPER_PROGRAM] = "Super Program", + [CPU_SPACE] = "CPU" +}; + +void die_if_kernel(char *,struct pt_regs *,int); +asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address, + unsigned long error_code); +int send_fault_sig(struct pt_regs *regs); + +asmlinkage void trap_c(struct frame *fp); + +#if defined (CONFIG_M68060) +static inline void access_error060 (struct frame *fp) +{ + unsigned long fslw = fp->un.fmt4.pc; /* is really FSLW for access error */ + +#ifdef DEBUG + printk("fslw=%#lx, fa=%#lx\n", fslw, fp->un.fmt4.effaddr); +#endif + + if (fslw & MMU060_BPE) { + /* branch prediction error -> clear branch cache */ + __asm__ __volatile__ ("movec %/cacr,%/d0\n\t" + "orl #0x00400000,%/d0\n\t" + "movec %/d0,%/cacr" + : : : "d0" ); + /* return if there's no other error */ + if (!(fslw & MMU060_ERR_BITS) && !(fslw & MMU060_SEE)) + return; + } + + if (fslw & (MMU060_DESC_ERR | MMU060_WP | MMU060_SP)) { + unsigned long errorcode; + unsigned long addr = fp->un.fmt4.effaddr; + + if (fslw & MMU060_MA) + addr = (addr + PAGE_SIZE - 1) & PAGE_MASK; + + errorcode = 1; + if (fslw & MMU060_DESC_ERR) { + __flush_tlb040_one(addr); + errorcode = 0; + } + if (fslw & MMU060_W) + errorcode |= 2; +#ifdef DEBUG + printk("errorcode = %d\n", errorcode ); +#endif + do_page_fault(&fp->ptregs, addr, errorcode); + } else if (fslw & (MMU060_SEE)){ + /* Software Emulation Error. + * fault during mem_read/mem_write in ifpsp060/os.S + */ + send_fault_sig(&fp->ptregs); + } else if (!(fslw & (MMU060_RE|MMU060_WE)) || + send_fault_sig(&fp->ptregs) > 0) { + printk("pc=%#lx, fa=%#lx\n", fp->ptregs.pc, fp->un.fmt4.effaddr); + printk( "68060 access error, fslw=%lx\n", fslw ); + trap_c( fp ); + } +} +#endif /* CONFIG_M68060 */ + +#if defined (CONFIG_M68040) +static inline unsigned long probe040(int iswrite, unsigned long addr, int wbs) +{ + unsigned long mmusr; + mm_segment_t old_fs = get_fs(); + + set_fs(MAKE_MM_SEG(wbs)); + + if (iswrite) + asm volatile (".chip 68040; ptestw (%0); .chip 68k" : : "a" (addr)); + else + asm volatile (".chip 68040; ptestr (%0); .chip 68k" : : "a" (addr)); + + asm volatile (".chip 68040; movec %%mmusr,%0; .chip 68k" : "=r" (mmusr)); + + set_fs(old_fs); + + return mmusr; +} + +static inline int do_040writeback1(unsigned short wbs, unsigned long wba, + unsigned long wbd) +{ + int res = 0; + mm_segment_t old_fs = get_fs(); + + /* set_fs can not be moved, otherwise put_user() may oops */ + set_fs(MAKE_MM_SEG(wbs)); + + switch (wbs & WBSIZ_040) { + case BA_SIZE_BYTE: + res = put_user(wbd & 0xff, (char __user *)wba); + break; + case BA_SIZE_WORD: + res = put_user(wbd & 0xffff, (short __user *)wba); + break; + case BA_SIZE_LONG: + res = put_user(wbd, (int __user *)wba); + break; + } + + /* set_fs can not be moved, otherwise put_user() may oops */ + set_fs(old_fs); + + +#ifdef DEBUG + printk("do_040writeback1, res=%d\n",res); +#endif + + return res; +} + +/* after an exception in a writeback the stack frame corresponding + * to that exception is discarded, set a few bits in the old frame + * to simulate what it should look like + */ +static inline void fix_xframe040(struct frame *fp, unsigned long wba, unsigned short wbs) +{ + fp->un.fmt7.faddr = wba; + fp->un.fmt7.ssw = wbs & 0xff; + if (wba != current->thread.faddr) + fp->un.fmt7.ssw |= MA_040; +} + +static inline void do_040writebacks(struct frame *fp) +{ + int res = 0; +#if 0 + if (fp->un.fmt7.wb1s & WBV_040) + printk("access_error040: cannot handle 1st writeback. oops.\n"); +#endif + + if ((fp->un.fmt7.wb2s & WBV_040) && + !(fp->un.fmt7.wb2s & WBTT_040)) { + res = do_040writeback1(fp->un.fmt7.wb2s, fp->un.fmt7.wb2a, + fp->un.fmt7.wb2d); + if (res) + fix_xframe040(fp, fp->un.fmt7.wb2a, fp->un.fmt7.wb2s); + else + fp->un.fmt7.wb2s = 0; + } + + /* do the 2nd wb only if the first one was successful (except for a kernel wb) */ + if (fp->un.fmt7.wb3s & WBV_040 && (!res || fp->un.fmt7.wb3s & 4)) { + res = do_040writeback1(fp->un.fmt7.wb3s, fp->un.fmt7.wb3a, + fp->un.fmt7.wb3d); + if (res) + { + fix_xframe040(fp, fp->un.fmt7.wb3a, fp->un.fmt7.wb3s); + + fp->un.fmt7.wb2s = fp->un.fmt7.wb3s; + fp->un.fmt7.wb3s &= (~WBV_040); + fp->un.fmt7.wb2a = fp->un.fmt7.wb3a; + fp->un.fmt7.wb2d = fp->un.fmt7.wb3d; + } + else + fp->un.fmt7.wb3s = 0; + } + + if (res) + send_fault_sig(&fp->ptregs); +} + +/* + * called from sigreturn(), must ensure userspace code didn't + * manipulate exception frame to circumvent protection, then complete + * pending writebacks + * we just clear TM2 to turn it into a userspace access + */ +asmlinkage void berr_040cleanup(struct frame *fp) +{ + fp->un.fmt7.wb2s &= ~4; + fp->un.fmt7.wb3s &= ~4; + + do_040writebacks(fp); +} + +static inline void access_error040(struct frame *fp) +{ + unsigned short ssw = fp->un.fmt7.ssw; + unsigned long mmusr; + +#ifdef DEBUG + printk("ssw=%#x, fa=%#lx\n", ssw, fp->un.fmt7.faddr); + printk("wb1s=%#x, wb2s=%#x, wb3s=%#x\n", fp->un.fmt7.wb1s, + fp->un.fmt7.wb2s, fp->un.fmt7.wb3s); + printk ("wb2a=%lx, wb3a=%lx, wb2d=%lx, wb3d=%lx\n", + fp->un.fmt7.wb2a, fp->un.fmt7.wb3a, + fp->un.fmt7.wb2d, fp->un.fmt7.wb3d); +#endif + + if (ssw & ATC_040) { + unsigned long addr = fp->un.fmt7.faddr; + unsigned long errorcode; + + /* + * The MMU status has to be determined AFTER the address + * has been corrected if there was a misaligned access (MA). + */ + if (ssw & MA_040) + addr = (addr + 7) & -8; + + /* MMU error, get the MMUSR info for this access */ + mmusr = probe040(!(ssw & RW_040), addr, ssw); +#ifdef DEBUG + printk("mmusr = %lx\n", mmusr); +#endif + errorcode = 1; + if (!(mmusr & MMU_R_040)) { + /* clear the invalid atc entry */ + __flush_tlb040_one(addr); + errorcode = 0; + } + + /* despite what documentation seems to say, RMW + * accesses have always both the LK and RW bits set */ + if (!(ssw & RW_040) || (ssw & LK_040)) + errorcode |= 2; + + if (do_page_fault(&fp->ptregs, addr, errorcode)) { +#ifdef DEBUG + printk("do_page_fault() !=0\n"); +#endif + if (user_mode(&fp->ptregs)){ + /* delay writebacks after signal delivery */ +#ifdef DEBUG + printk(".. was usermode - return\n"); +#endif + return; + } + /* disable writeback into user space from kernel + * (if do_page_fault didn't fix the mapping, + * the writeback won't do good) + */ +disable_wb: +#ifdef DEBUG + printk(".. disabling wb2\n"); +#endif + if (fp->un.fmt7.wb2a == fp->un.fmt7.faddr) + fp->un.fmt7.wb2s &= ~WBV_040; + if (fp->un.fmt7.wb3a == fp->un.fmt7.faddr) + fp->un.fmt7.wb3s &= ~WBV_040; + } + } else { + /* In case of a bus error we either kill the process or expect + * the kernel to catch the fault, which then is also responsible + * for cleaning up the mess. + */ + current->thread.signo = SIGBUS; + current->thread.faddr = fp->un.fmt7.faddr; + if (send_fault_sig(&fp->ptregs) >= 0) + printk("68040 bus error (ssw=%x, faddr=%lx)\n", ssw, + fp->un.fmt7.faddr); + goto disable_wb; + } + + do_040writebacks(fp); +} +#endif /* CONFIG_M68040 */ + +#if defined(CONFIG_SUN3) +#include <asm/sun3mmu.h> + +extern int mmu_emu_handle_fault (unsigned long, int, int); + +/* sun3 version of bus_error030 */ + +static inline void bus_error030 (struct frame *fp) +{ + unsigned char buserr_type = sun3_get_buserr (); + unsigned long addr, errorcode; + unsigned short ssw = fp->un.fmtb.ssw; + extern unsigned long _sun3_map_test_start, _sun3_map_test_end; + +#ifdef DEBUG + if (ssw & (FC | FB)) + printk ("Instruction fault at %#010lx\n", + ssw & FC ? + fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2 + : + fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr); + if (ssw & DF) + printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n", + ssw & RW ? "read" : "write", + fp->un.fmtb.daddr, + space_names[ssw & DFC], fp->ptregs.pc); +#endif + + /* + * Check if this page should be demand-mapped. This needs to go before + * the testing for a bad kernel-space access (demand-mapping applies + * to kernel accesses too). + */ + + if ((ssw & DF) + && (buserr_type & (SUN3_BUSERR_PROTERR | SUN3_BUSERR_INVALID))) { + if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 0)) + return; + } + + /* Check for kernel-space pagefault (BAD). */ + if (fp->ptregs.sr & PS_S) { + /* kernel fault must be a data fault to user space */ + if (! ((ssw & DF) && ((ssw & DFC) == USER_DATA))) { + // try checking the kernel mappings before surrender + if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 1)) + return; + /* instruction fault or kernel data fault! */ + if (ssw & (FC | FB)) + printk ("Instruction fault at %#010lx\n", + fp->ptregs.pc); + if (ssw & DF) { + /* was this fault incurred testing bus mappings? */ + if((fp->ptregs.pc >= (unsigned long)&_sun3_map_test_start) && + (fp->ptregs.pc <= (unsigned long)&_sun3_map_test_end)) { + send_fault_sig(&fp->ptregs); + return; + } + + printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n", + ssw & RW ? "read" : "write", + fp->un.fmtb.daddr, + space_names[ssw & DFC], fp->ptregs.pc); + } + printk ("BAD KERNEL BUSERR\n"); + + die_if_kernel("Oops", &fp->ptregs,0); + force_sig(SIGKILL, current); + return; + } + } else { + /* user fault */ + if (!(ssw & (FC | FB)) && !(ssw & DF)) + /* not an instruction fault or data fault! BAD */ + panic ("USER BUSERR w/o instruction or data fault"); + } + + + /* First handle the data fault, if any. */ + if (ssw & DF) { + addr = fp->un.fmtb.daddr; + +// errorcode bit 0: 0 -> no page 1 -> protection fault +// errorcode bit 1: 0 -> read fault 1 -> write fault + +// (buserr_type & SUN3_BUSERR_PROTERR) -> protection fault +// (buserr_type & SUN3_BUSERR_INVALID) -> invalid page fault + + if (buserr_type & SUN3_BUSERR_PROTERR) + errorcode = 0x01; + else if (buserr_type & SUN3_BUSERR_INVALID) + errorcode = 0x00; + else { +#ifdef DEBUG + printk ("*** unexpected busfault type=%#04x\n", buserr_type); + printk ("invalid %s access at %#lx from pc %#lx\n", + !(ssw & RW) ? "write" : "read", addr, + fp->ptregs.pc); +#endif + die_if_kernel ("Oops", &fp->ptregs, buserr_type); + force_sig (SIGBUS, current); + return; + } + +//todo: wtf is RM bit? --m + if (!(ssw & RW) || ssw & RM) + errorcode |= 0x02; + + /* Handle page fault. */ + do_page_fault (&fp->ptregs, addr, errorcode); + + /* Retry the data fault now. */ + return; + } + + /* Now handle the instruction fault. */ + + /* Get the fault address. */ + if (fp->ptregs.format == 0xA) + addr = fp->ptregs.pc + 4; + else + addr = fp->un.fmtb.baddr; + if (ssw & FC) + addr -= 2; + + if (buserr_type & SUN3_BUSERR_INVALID) { + if (!mmu_emu_handle_fault (fp->un.fmtb.daddr, 1, 0)) + do_page_fault (&fp->ptregs, addr, 0); + } else { +#ifdef DEBUG + printk ("protection fault on insn access (segv).\n"); +#endif + force_sig (SIGSEGV, current); + } +} +#else +#if defined(CPU_M68020_OR_M68030) +static inline void bus_error030 (struct frame *fp) +{ + volatile unsigned short temp; + unsigned short mmusr; + unsigned long addr, errorcode; + unsigned short ssw = fp->un.fmtb.ssw; +#ifdef DEBUG + unsigned long desc; + + printk ("pid = %x ", current->pid); + printk ("SSW=%#06x ", ssw); + + if (ssw & (FC | FB)) + printk ("Instruction fault at %#010lx\n", + ssw & FC ? + fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2 + : + fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr); + if (ssw & DF) + printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n", + ssw & RW ? "read" : "write", + fp->un.fmtb.daddr, + space_names[ssw & DFC], fp->ptregs.pc); +#endif + + /* ++andreas: If a data fault and an instruction fault happen + at the same time map in both pages. */ + + /* First handle the data fault, if any. */ + if (ssw & DF) { + addr = fp->un.fmtb.daddr; + +#ifdef DEBUG + asm volatile ("ptestr %3,%2@,#7,%0\n\t" + "pmove %%psr,%1@" + : "=a&" (desc) + : "a" (&temp), "a" (addr), "d" (ssw)); +#else + asm volatile ("ptestr %2,%1@,#7\n\t" + "pmove %%psr,%0@" + : : "a" (&temp), "a" (addr), "d" (ssw)); +#endif + mmusr = temp; + +#ifdef DEBUG + printk("mmusr is %#x for addr %#lx in task %p\n", + mmusr, addr, current); + printk("descriptor address is %#lx, contents %#lx\n", + __va(desc), *(unsigned long *)__va(desc)); +#endif + + errorcode = (mmusr & MMU_I) ? 0 : 1; + if (!(ssw & RW) || (ssw & RM)) + errorcode |= 2; + + if (mmusr & (MMU_I | MMU_WP)) { + if (ssw & 4) { + printk("Data %s fault at %#010lx in %s (pc=%#lx)\n", + ssw & RW ? "read" : "write", + fp->un.fmtb.daddr, + space_names[ssw & DFC], fp->ptregs.pc); + goto buserr; + } + /* Don't try to do anything further if an exception was + handled. */ + if (do_page_fault (&fp->ptregs, addr, errorcode) < 0) + return; + } else if (!(mmusr & MMU_I)) { + /* probably a 020 cas fault */ + if (!(ssw & RM) && send_fault_sig(&fp->ptregs) > 0) + printk("unexpected bus error (%#x,%#x)\n", ssw, mmusr); + } else if (mmusr & (MMU_B|MMU_L|MMU_S)) { + printk("invalid %s access at %#lx from pc %#lx\n", + !(ssw & RW) ? "write" : "read", addr, + fp->ptregs.pc); + die_if_kernel("Oops",&fp->ptregs,mmusr); + force_sig(SIGSEGV, current); + return; + } else { +#if 0 + static volatile long tlong; +#endif + + printk("weird %s access at %#lx from pc %#lx (ssw is %#x)\n", + !(ssw & RW) ? "write" : "read", addr, + fp->ptregs.pc, ssw); + asm volatile ("ptestr #1,%1@,#0\n\t" + "pmove %%psr,%0@" + : /* no outputs */ + : "a" (&temp), "a" (addr)); + mmusr = temp; + + printk ("level 0 mmusr is %#x\n", mmusr); +#if 0 + asm volatile ("pmove %%tt0,%0@" + : /* no outputs */ + : "a" (&tlong)); + printk("tt0 is %#lx, ", tlong); + asm volatile ("pmove %%tt1,%0@" + : /* no outputs */ + : "a" (&tlong)); + printk("tt1 is %#lx\n", tlong); +#endif +#ifdef DEBUG + printk("Unknown SIGSEGV - 1\n"); +#endif + die_if_kernel("Oops",&fp->ptregs,mmusr); + force_sig(SIGSEGV, current); + return; + } + + /* setup an ATC entry for the access about to be retried */ + if (!(ssw & RW) || (ssw & RM)) + asm volatile ("ploadw %1,%0@" : /* no outputs */ + : "a" (addr), "d" (ssw)); + else + asm volatile ("ploadr %1,%0@" : /* no outputs */ + : "a" (addr), "d" (ssw)); + } + + /* Now handle the instruction fault. */ + + if (!(ssw & (FC|FB))) + return; + + if (fp->ptregs.sr & PS_S) { + printk("Instruction fault at %#010lx\n", + fp->ptregs.pc); + buserr: + printk ("BAD KERNEL BUSERR\n"); + die_if_kernel("Oops",&fp->ptregs,0); + force_sig(SIGKILL, current); + return; + } + + /* get the fault address */ + if (fp->ptregs.format == 10) + addr = fp->ptregs.pc + 4; + else + addr = fp->un.fmtb.baddr; + if (ssw & FC) + addr -= 2; + + if ((ssw & DF) && ((addr ^ fp->un.fmtb.daddr) & PAGE_MASK) == 0) + /* Insn fault on same page as data fault. But we + should still create the ATC entry. */ + goto create_atc_entry; + +#ifdef DEBUG + asm volatile ("ptestr #1,%2@,#7,%0\n\t" + "pmove %%psr,%1@" + : "=a&" (desc) + : "a" (&temp), "a" (addr)); +#else + asm volatile ("ptestr #1,%1@,#7\n\t" + "pmove %%psr,%0@" + : : "a" (&temp), "a" (addr)); +#endif + mmusr = temp; + +#ifdef DEBUG + printk ("mmusr is %#x for addr %#lx in task %p\n", + mmusr, addr, current); + printk ("descriptor address is %#lx, contents %#lx\n", + __va(desc), *(unsigned long *)__va(desc)); +#endif + + if (mmusr & MMU_I) + do_page_fault (&fp->ptregs, addr, 0); + else if (mmusr & (MMU_B|MMU_L|MMU_S)) { + printk ("invalid insn access at %#lx from pc %#lx\n", + addr, fp->ptregs.pc); +#ifdef DEBUG + printk("Unknown SIGSEGV - 2\n"); +#endif + die_if_kernel("Oops",&fp->ptregs,mmusr); + force_sig(SIGSEGV, current); + return; + } + +create_atc_entry: + /* setup an ATC entry for the access about to be retried */ + asm volatile ("ploadr #2,%0@" : /* no outputs */ + : "a" (addr)); +} +#endif /* CPU_M68020_OR_M68030 */ +#endif /* !CONFIG_SUN3 */ + +asmlinkage void buserr_c(struct frame *fp) +{ + /* Only set esp0 if coming from user mode */ + if (user_mode(&fp->ptregs)) + current->thread.esp0 = (unsigned long) fp; + +#ifdef DEBUG + printk ("*** Bus Error *** Format is %x\n", fp->ptregs.format); +#endif + + switch (fp->ptregs.format) { +#if defined (CONFIG_M68060) + case 4: /* 68060 access error */ + access_error060 (fp); + break; +#endif +#if defined (CONFIG_M68040) + case 0x7: /* 68040 access error */ + access_error040 (fp); + break; +#endif +#if defined (CPU_M68020_OR_M68030) + case 0xa: + case 0xb: + bus_error030 (fp); + break; +#endif + default: + die_if_kernel("bad frame format",&fp->ptregs,0); +#ifdef DEBUG + printk("Unknown SIGSEGV - 4\n"); +#endif + force_sig(SIGSEGV, current); + } +} + + +static int kstack_depth_to_print = 48; + +void show_trace(unsigned long *stack) +{ + unsigned long *endstack; + unsigned long addr; + int i; + + printk("Call Trace:"); + addr = (unsigned long)stack + THREAD_SIZE - 1; + endstack = (unsigned long *)(addr & -THREAD_SIZE); + i = 0; + while (stack + 1 <= endstack) { + addr = *stack++; + /* + * If the address is either in the text segment of the + * kernel, or in the region which contains vmalloc'ed + * memory, it *may* be the address of a calling + * routine; if so, print it so that someone tracing + * down the cause of the crash will be able to figure + * out the call path that was taken. + */ + if (__kernel_text_address(addr)) { +#ifndef CONFIG_KALLSYMS + if (i % 5 == 0) + printk("\n "); +#endif + printk(" [<%08lx>] %pS\n", addr, (void *)addr); + i++; + } + } + printk("\n"); +} + +void show_registers(struct pt_regs *regs) +{ + struct frame *fp = (struct frame *)regs; + mm_segment_t old_fs = get_fs(); + u16 c, *cp; + unsigned long addr; + int i; + + print_modules(); + printk("PC: [<%08lx>] %pS\n", regs->pc, (void *)regs->pc); + printk("SR: %04x SP: %p a2: %08lx\n", regs->sr, regs, regs->a2); + printk("d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n", + regs->d0, regs->d1, regs->d2, regs->d3); + printk("d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n", + regs->d4, regs->d5, regs->a0, regs->a1); + + printk("Process %s (pid: %d, task=%p)\n", + current->comm, task_pid_nr(current), current); + addr = (unsigned long)&fp->un; + printk("Frame format=%X ", regs->format); + switch (regs->format) { + case 0x2: + printk("instr addr=%08lx\n", fp->un.fmt2.iaddr); + addr += sizeof(fp->un.fmt2); + break; + case 0x3: + printk("eff addr=%08lx\n", fp->un.fmt3.effaddr); + addr += sizeof(fp->un.fmt3); + break; + case 0x4: + printk((CPU_IS_060 ? "fault addr=%08lx fslw=%08lx\n" + : "eff addr=%08lx pc=%08lx\n"), + fp->un.fmt4.effaddr, fp->un.fmt4.pc); + addr += sizeof(fp->un.fmt4); + break; + case 0x7: + printk("eff addr=%08lx ssw=%04x faddr=%08lx\n", + fp->un.fmt7.effaddr, fp->un.fmt7.ssw, fp->un.fmt7.faddr); + printk("wb 1 stat/addr/data: %04x %08lx %08lx\n", + fp->un.fmt7.wb1s, fp->un.fmt7.wb1a, fp->un.fmt7.wb1dpd0); + printk("wb 2 stat/addr/data: %04x %08lx %08lx\n", + fp->un.fmt7.wb2s, fp->un.fmt7.wb2a, fp->un.fmt7.wb2d); + printk("wb 3 stat/addr/data: %04x %08lx %08lx\n", + fp->un.fmt7.wb3s, fp->un.fmt7.wb3a, fp->un.fmt7.wb3d); + printk("push data: %08lx %08lx %08lx %08lx\n", + fp->un.fmt7.wb1dpd0, fp->un.fmt7.pd1, fp->un.fmt7.pd2, + fp->un.fmt7.pd3); + addr += sizeof(fp->un.fmt7); + break; + case 0x9: + printk("instr addr=%08lx\n", fp->un.fmt9.iaddr); + addr += sizeof(fp->un.fmt9); + break; + case 0xa: + printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n", + fp->un.fmta.ssw, fp->un.fmta.isc, fp->un.fmta.isb, + fp->un.fmta.daddr, fp->un.fmta.dobuf); + addr += sizeof(fp->un.fmta); + break; + case 0xb: + printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n", + fp->un.fmtb.ssw, fp->un.fmtb.isc, fp->un.fmtb.isb, + fp->un.fmtb.daddr, fp->un.fmtb.dobuf); + printk("baddr=%08lx dibuf=%08lx ver=%x\n", + fp->un.fmtb.baddr, fp->un.fmtb.dibuf, fp->un.fmtb.ver); + addr += sizeof(fp->un.fmtb); + break; + default: + printk("\n"); + } + show_stack(NULL, (unsigned long *)addr); + + printk("Code:"); + set_fs(KERNEL_DS); + cp = (u16 *)regs->pc; + for (i = -8; i < 16; i++) { + if (get_user(c, cp + i) && i >= 0) { + printk(" Bad PC value."); + break; + } + printk(i ? " %04x" : " <%04x>", c); + } + set_fs(old_fs); + printk ("\n"); +} + +void show_stack(struct task_struct *task, unsigned long *stack) +{ + unsigned long *p; + unsigned long *endstack; + int i; + + if (!stack) { + if (task) + stack = (unsigned long *)task->thread.esp0; + else + stack = (unsigned long *)&stack; + } + endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE); + + printk("Stack from %08lx:", (unsigned long)stack); + p = stack; + for (i = 0; i < kstack_depth_to_print; i++) { + if (p + 1 > endstack) + break; + if (i % 8 == 0) + printk("\n "); + printk(" %08lx", *p++); + } + printk("\n"); + show_trace(stack); +} + +/* + * The architecture-independent backtrace generator + */ +void dump_stack(void) +{ + unsigned long stack; + + show_trace(&stack); +} + +EXPORT_SYMBOL(dump_stack); + +void bad_super_trap (struct frame *fp) +{ + console_verbose(); + if (fp->ptregs.vector < 4 * ARRAY_SIZE(vec_names)) + printk ("*** %s *** FORMAT=%X\n", + vec_names[(fp->ptregs.vector) >> 2], + fp->ptregs.format); + else + printk ("*** Exception %d *** FORMAT=%X\n", + (fp->ptregs.vector) >> 2, + fp->ptregs.format); + if (fp->ptregs.vector >> 2 == VEC_ADDRERR && CPU_IS_020_OR_030) { + unsigned short ssw = fp->un.fmtb.ssw; + + printk ("SSW=%#06x ", ssw); + + if (ssw & RC) + printk ("Pipe stage C instruction fault at %#010lx\n", + (fp->ptregs.format) == 0xA ? + fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2); + if (ssw & RB) + printk ("Pipe stage B instruction fault at %#010lx\n", + (fp->ptregs.format) == 0xA ? + fp->ptregs.pc + 4 : fp->un.fmtb.baddr); + if (ssw & DF) + printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n", + ssw & RW ? "read" : "write", + fp->un.fmtb.daddr, space_names[ssw & DFC], + fp->ptregs.pc); + } + printk ("Current process id is %d\n", task_pid_nr(current)); + die_if_kernel("BAD KERNEL TRAP", &fp->ptregs, 0); +} + +asmlinkage void trap_c(struct frame *fp) +{ + int sig; + siginfo_t info; + + if (fp->ptregs.sr & PS_S) { + if (fp->ptregs.vector == VEC_TRACE << 2) { + /* traced a trapping instruction on a 68020/30, + * real exception will be executed afterwards. + */ + } else if (!handle_kernel_fault(&fp->ptregs)) + bad_super_trap(fp); + return; + } + + /* send the appropriate signal to the user program */ + switch ((fp->ptregs.vector) >> 2) { + case VEC_ADDRERR: + info.si_code = BUS_ADRALN; + sig = SIGBUS; + break; + case VEC_ILLEGAL: + case VEC_LINE10: + case VEC_LINE11: + info.si_code = ILL_ILLOPC; + sig = SIGILL; + break; + case VEC_PRIV: + info.si_code = ILL_PRVOPC; + sig = SIGILL; + break; + case VEC_COPROC: + info.si_code = ILL_COPROC; + sig = SIGILL; + break; + case VEC_TRAP1: + case VEC_TRAP2: + case VEC_TRAP3: + case VEC_TRAP4: + case VEC_TRAP5: + case VEC_TRAP6: + case VEC_TRAP7: + case VEC_TRAP8: + case VEC_TRAP9: + case VEC_TRAP10: + case VEC_TRAP11: + case VEC_TRAP12: + case VEC_TRAP13: + case VEC_TRAP14: + info.si_code = ILL_ILLTRP; + sig = SIGILL; + break; + case VEC_FPBRUC: + case VEC_FPOE: + case VEC_FPNAN: + info.si_code = FPE_FLTINV; + sig = SIGFPE; + break; + case VEC_FPIR: + info.si_code = FPE_FLTRES; + sig = SIGFPE; + break; + case VEC_FPDIVZ: + info.si_code = FPE_FLTDIV; + sig = SIGFPE; + break; + case VEC_FPUNDER: + info.si_code = FPE_FLTUND; + sig = SIGFPE; + break; + case VEC_FPOVER: + info.si_code = FPE_FLTOVF; + sig = SIGFPE; + break; + case VEC_ZERODIV: + info.si_code = FPE_INTDIV; + sig = SIGFPE; + break; + case VEC_CHK: + case VEC_TRAP: + info.si_code = FPE_INTOVF; + sig = SIGFPE; + break; + case VEC_TRACE: /* ptrace single step */ + info.si_code = TRAP_TRACE; + sig = SIGTRAP; + break; + case VEC_TRAP15: /* breakpoint */ + info.si_code = TRAP_BRKPT; + sig = SIGTRAP; + break; + default: + info.si_code = ILL_ILLOPC; + sig = SIGILL; + break; + } + info.si_signo = sig; + info.si_errno = 0; + switch (fp->ptregs.format) { + default: + info.si_addr = (void *) fp->ptregs.pc; + break; + case 2: + info.si_addr = (void *) fp->un.fmt2.iaddr; + break; + case 7: + info.si_addr = (void *) fp->un.fmt7.effaddr; + break; + case 9: + info.si_addr = (void *) fp->un.fmt9.iaddr; + break; + case 10: + info.si_addr = (void *) fp->un.fmta.daddr; + break; + case 11: + info.si_addr = (void *) fp->un.fmtb.daddr; + break; + } + force_sig_info (sig, &info, current); +} + +void die_if_kernel (char *str, struct pt_regs *fp, int nr) +{ + if (!(fp->sr & PS_S)) + return; + + console_verbose(); + printk("%s: %08x\n",str,nr); + show_registers(fp); + add_taint(TAINT_DIE); + do_exit(SIGSEGV); +} + +/* + * This function is called if an error occur while accessing + * user-space from the fpsp040 code. + */ +asmlinkage void fpsp040_die(void) +{ + do_exit(SIGSEGV); +} + +#ifdef CONFIG_M68KFPU_EMU +asmlinkage void fpemu_signal(int signal, int code, void *addr) +{ + siginfo_t info; + + info.si_signo = signal; + info.si_errno = 0; + info.si_code = code; + info.si_addr = addr; + force_sig_info(signal, &info, current); +} +#endif diff --git a/arch/m68k/kernel/traps_no.c b/arch/m68k/kernel/traps_no.c new file mode 100644 index 0000000..a768008 --- /dev/null +++ b/arch/m68k/kernel/traps_no.c @@ -0,0 +1,365 @@ +/* + * linux/arch/m68knommu/kernel/traps.c + * + * Copyright (C) 1993, 1994 by Hamish Macdonald + * + * 68040 fixes by Michael Rausch + * 68040 fixes by Martin Apel + * 68060 fixes by Roman Hodek + * 68060 fixes by Jesper Skov + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +/* + * Sets up all exception vectors + */ +#include <linux/sched.h> +#include <linux/signal.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/user.h> +#include <linux/string.h> +#include <linux/linkage.h> +#include <linux/init.h> +#include <linux/ptrace.h> +#include <linux/kallsyms.h> + +#include <asm/setup.h> +#include <asm/fpu.h> +#include <asm/system.h> +#include <asm/uaccess.h> +#include <asm/traps.h> +#include <asm/pgtable.h> +#include <asm/machdep.h> +#include <asm/siginfo.h> + +static char const * const vec_names[] = { + "RESET SP", "RESET PC", "BUS ERROR", "ADDRESS ERROR", + "ILLEGAL INSTRUCTION", "ZERO DIVIDE", "CHK", "TRAPcc", + "PRIVILEGE VIOLATION", "TRACE", "LINE 1010", "LINE 1111", + "UNASSIGNED RESERVED 12", "COPROCESSOR PROTOCOL VIOLATION", + "FORMAT ERROR", "UNINITIALIZED INTERRUPT", + "UNASSIGNED RESERVED 16", "UNASSIGNED RESERVED 17", + "UNASSIGNED RESERVED 18", "UNASSIGNED RESERVED 19", + "UNASSIGNED RESERVED 20", "UNASSIGNED RESERVED 21", + "UNASSIGNED RESERVED 22", "UNASSIGNED RESERVED 23", + "SPURIOUS INTERRUPT", "LEVEL 1 INT", "LEVEL 2 INT", "LEVEL 3 INT", + "LEVEL 4 INT", "LEVEL 5 INT", "LEVEL 6 INT", "LEVEL 7 INT", + "SYSCALL", "TRAP #1", "TRAP #2", "TRAP #3", + "TRAP #4", "TRAP #5", "TRAP #6", "TRAP #7", + "TRAP #8", "TRAP #9", "TRAP #10", "TRAP #11", + "TRAP #12", "TRAP #13", "TRAP #14", "TRAP #15", + "FPCP BSUN", "FPCP INEXACT", "FPCP DIV BY 0", "FPCP UNDERFLOW", + "FPCP OPERAND ERROR", "FPCP OVERFLOW", "FPCP SNAN", + "FPCP UNSUPPORTED OPERATION", + "MMU CONFIGURATION ERROR" +}; + +void __init trap_init(void) +{ +} + +void die_if_kernel(char *str, struct pt_regs *fp, int nr) +{ + if (!(fp->sr & PS_S)) + return; + + console_verbose(); + printk(KERN_EMERG "%s: %08x\n",str,nr); + printk(KERN_EMERG "PC: [<%08lx>]\nSR: %04x SP: %p a2: %08lx\n", + fp->pc, fp->sr, fp, fp->a2); + printk(KERN_EMERG "d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n", + fp->d0, fp->d1, fp->d2, fp->d3); + printk(KERN_EMERG "d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n", + fp->d4, fp->d5, fp->a0, fp->a1); + + printk(KERN_EMERG "Process %s (pid: %d, stackpage=%08lx)\n", + current->comm, current->pid, PAGE_SIZE+(unsigned long)current); + show_stack(NULL, (unsigned long *)(fp + 1)); + add_taint(TAINT_DIE); + do_exit(SIGSEGV); +} + +asmlinkage void buserr_c(struct frame *fp) +{ + /* Only set esp0 if coming from user mode */ + if (user_mode(&fp->ptregs)) + current->thread.esp0 = (unsigned long) fp; + +#if defined(DEBUG) + printk (KERN_DEBUG "*** Bus Error *** Format is %x\n", fp->ptregs.format); +#endif + + die_if_kernel("bad frame format",&fp->ptregs,0); +#if defined(DEBUG) + printk(KERN_DEBUG "Unknown SIGSEGV - 4\n"); +#endif + force_sig(SIGSEGV, current); +} + +static void print_this_address(unsigned long addr, int i) +{ +#ifdef CONFIG_KALLSYMS + printk(KERN_EMERG " [%08lx] ", addr); + print_symbol(KERN_CONT "%s\n", addr); +#else + if (i % 5) + printk(KERN_CONT " [%08lx] ", addr); + else + printk(KERN_EMERG " [%08lx] ", addr); + i++; +#endif +} + +int kstack_depth_to_print = 48; + +static void __show_stack(struct task_struct *task, unsigned long *stack) +{ + unsigned long *endstack, addr; +#ifdef CONFIG_FRAME_POINTER + unsigned long *last_stack; +#endif + int i; + + if (!stack) + stack = (unsigned long *)task->thread.ksp; + + addr = (unsigned long) stack; + endstack = (unsigned long *) PAGE_ALIGN(addr); + + printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack); + for (i = 0; i < kstack_depth_to_print; i++) { + if (stack + 1 + i > endstack) + break; + if (i % 8 == 0) + printk(KERN_EMERG " "); + printk(KERN_CONT " %08lx", *(stack + i)); + } + printk("\n"); + i = 0; + +#ifdef CONFIG_FRAME_POINTER + printk(KERN_EMERG "Call Trace:\n"); + + last_stack = stack - 1; + while (stack <= endstack && stack > last_stack) { + + addr = *(stack + 1); + print_this_address(addr, i); + i++; + + last_stack = stack; + stack = (unsigned long *)*stack; + } + printk("\n"); +#else + printk(KERN_EMERG "Call Trace with CONFIG_FRAME_POINTER disabled:\n"); + while (stack <= endstack) { + addr = *stack++; + /* + * If the address is either in the text segment of the kernel, + * or in a region which is occupied by a module then it *may* + * be the address of a calling routine; if so, print it so that + * someone tracing down the cause of the crash will be able to + * figure out the call path that was taken. + */ + if (__kernel_text_address(addr)) { + print_this_address(addr, i); + i++; + } + } + printk(KERN_CONT "\n"); +#endif +} + +void bad_super_trap(struct frame *fp) +{ + int vector = (fp->ptregs.vector >> 2) & 0xff; + + console_verbose(); + if (vector < ARRAY_SIZE(vec_names)) + printk (KERN_WARNING "*** %s *** FORMAT=%X\n", + vec_names[vector], + fp->ptregs.format); + else + printk (KERN_WARNING "*** Exception %d *** FORMAT=%X\n", + vector, + fp->ptregs.format); + printk (KERN_WARNING "Current process id is %d\n", current->pid); + die_if_kernel("BAD KERNEL TRAP", &fp->ptregs, 0); +} + +asmlinkage void trap_c(struct frame *fp) +{ + int sig; + int vector = (fp->ptregs.vector >> 2) & 0xff; + siginfo_t info; + + if (fp->ptregs.sr & PS_S) { + if (vector == VEC_TRACE) { + /* traced a trapping instruction */ + } else + bad_super_trap(fp); + return; + } + + /* send the appropriate signal to the user program */ + switch (vector) { + case VEC_ADDRERR: + info.si_code = BUS_ADRALN; + sig = SIGBUS; + break; + case VEC_ILLEGAL: + case VEC_LINE10: + case VEC_LINE11: + info.si_code = ILL_ILLOPC; + sig = SIGILL; + break; + case VEC_PRIV: + info.si_code = ILL_PRVOPC; + sig = SIGILL; + break; + case VEC_COPROC: + info.si_code = ILL_COPROC; + sig = SIGILL; + break; + case VEC_TRAP1: /* gdbserver breakpoint */ + fp->ptregs.pc -= 2; + info.si_code = TRAP_TRACE; + sig = SIGTRAP; + break; + case VEC_TRAP2: + case VEC_TRAP3: + case VEC_TRAP4: + case VEC_TRAP5: + case VEC_TRAP6: + case VEC_TRAP7: + case VEC_TRAP8: + case VEC_TRAP9: + case VEC_TRAP10: + case VEC_TRAP11: + case VEC_TRAP12: + case VEC_TRAP13: + case VEC_TRAP14: + info.si_code = ILL_ILLTRP; + sig = SIGILL; + break; + case VEC_FPBRUC: + case VEC_FPOE: + case VEC_FPNAN: + info.si_code = FPE_FLTINV; + sig = SIGFPE; + break; + case VEC_FPIR: + info.si_code = FPE_FLTRES; + sig = SIGFPE; + break; + case VEC_FPDIVZ: + info.si_code = FPE_FLTDIV; + sig = SIGFPE; + break; + case VEC_FPUNDER: + info.si_code = FPE_FLTUND; + sig = SIGFPE; + break; + case VEC_FPOVER: + info.si_code = FPE_FLTOVF; + sig = SIGFPE; + break; + case VEC_ZERODIV: + info.si_code = FPE_INTDIV; + sig = SIGFPE; + break; + case VEC_CHK: + case VEC_TRAP: + info.si_code = FPE_INTOVF; + sig = SIGFPE; + break; + case VEC_TRACE: /* ptrace single step */ + info.si_code = TRAP_TRACE; + sig = SIGTRAP; + break; + case VEC_TRAP15: /* breakpoint */ + info.si_code = TRAP_BRKPT; + sig = SIGTRAP; + break; + default: + info.si_code = ILL_ILLOPC; + sig = SIGILL; + break; + } + info.si_signo = sig; + info.si_errno = 0; + switch (fp->ptregs.format) { + default: + info.si_addr = (void *) fp->ptregs.pc; + break; + case 2: + info.si_addr = (void *) fp->un.fmt2.iaddr; + break; + case 7: + info.si_addr = (void *) fp->un.fmt7.effaddr; + break; + case 9: + info.si_addr = (void *) fp->un.fmt9.iaddr; + break; + case 10: + info.si_addr = (void *) fp->un.fmta.daddr; + break; + case 11: + info.si_addr = (void *) fp->un.fmtb.daddr; + break; + } + force_sig_info (sig, &info, current); +} + +asmlinkage void set_esp0(unsigned long ssp) +{ + current->thread.esp0 = ssp; +} + +/* + * The architecture-independent backtrace generator + */ +void dump_stack(void) +{ + /* + * We need frame pointers for this little trick, which works as follows: + * + * +------------+ 0x00 + * | Next SP | -> 0x0c + * +------------+ 0x04 + * | Caller | + * +------------+ 0x08 + * | Local vars | -> our stack var + * +------------+ 0x0c + * | Next SP | -> 0x18, that is what we pass to show_stack() + * +------------+ 0x10 + * | Caller | + * +------------+ 0x14 + * | Local vars | + * +------------+ 0x18 + * | ... | + * +------------+ + */ + + unsigned long *stack; + + stack = (unsigned long *)&stack; + stack++; + __show_stack(current, stack); +} +EXPORT_SYMBOL(dump_stack); + +void show_stack(struct task_struct *task, unsigned long *stack) +{ + if (!stack && !task) + dump_stack(); + else + __show_stack(task, stack); +} diff --git a/arch/m68k/kernel/vmlinux.lds.S b/arch/m68k/kernel/vmlinux.lds.S index 99ba315..030dabf 100644 --- a/arch/m68k/kernel/vmlinux.lds.S +++ b/arch/m68k/kernel/vmlinux.lds.S @@ -1,10 +1,5 @@ -PHDRS -{ - text PT_LOAD FILEHDR PHDRS FLAGS (7); - data PT_LOAD FLAGS (7); -} -#ifdef CONFIG_SUN3 -#include "vmlinux-sun3.lds" +#ifdef CONFIG_MMU +#include "vmlinux.lds_mm.S" #else -#include "vmlinux-std.lds" +#include "vmlinux.lds_no.S" #endif diff --git a/arch/m68k/kernel/vmlinux.lds_mm.S b/arch/m68k/kernel/vmlinux.lds_mm.S new file mode 100644 index 0000000..99ba315 --- /dev/null +++ b/arch/m68k/kernel/vmlinux.lds_mm.S @@ -0,0 +1,10 @@ +PHDRS +{ + text PT_LOAD FILEHDR PHDRS FLAGS (7); + data PT_LOAD FLAGS (7); +} +#ifdef CONFIG_SUN3 +#include "vmlinux-sun3.lds" +#else +#include "vmlinux-std.lds" +#endif diff --git a/arch/m68k/kernel/vmlinux.lds_no.S b/arch/m68k/kernel/vmlinux.lds_no.S new file mode 100644 index 0000000..f4d715cd --- /dev/null +++ b/arch/m68k/kernel/vmlinux.lds_no.S @@ -0,0 +1,188 @@ +/* + * vmlinux.lds.S -- master linker script for m68knommu arch + * + * (C) Copyright 2002-2006, Greg Ungerer <gerg@snapgear.com> + * + * This linker script is equipped to build either ROM loaded or RAM + * run kernels. + */ + +#include <asm-generic/vmlinux.lds.h> +#include <asm/page.h> +#include <asm/thread_info.h> + +#if defined(CONFIG_RAMKERNEL) +#define RAM_START CONFIG_KERNELBASE +#define RAM_LENGTH (CONFIG_RAMBASE + CONFIG_RAMSIZE - CONFIG_KERNELBASE) +#define TEXT ram +#define DATA ram +#define INIT ram +#define BSSS ram +#endif +#if defined(CONFIG_ROMKERNEL) || defined(CONFIG_HIMEMKERNEL) +#define RAM_START CONFIG_RAMBASE +#define RAM_LENGTH CONFIG_RAMSIZE +#define ROMVEC_START CONFIG_ROMVEC +#define ROMVEC_LENGTH CONFIG_ROMVECSIZE +#define ROM_START CONFIG_ROMSTART +#define ROM_LENGTH CONFIG_ROMSIZE +#define TEXT rom +#define DATA ram +#define INIT ram +#define BSSS ram +#endif + +#ifndef DATA_ADDR +#define DATA_ADDR +#endif + + +OUTPUT_ARCH(m68k) +ENTRY(_start) + +MEMORY { + ram : ORIGIN = RAM_START, LENGTH = RAM_LENGTH +#ifdef ROM_START + romvec : ORIGIN = ROMVEC_START, LENGTH = ROMVEC_LENGTH + rom : ORIGIN = ROM_START, LENGTH = ROM_LENGTH +#endif +} + +jiffies = jiffies_64 + 4; + +SECTIONS { + +#ifdef ROMVEC_START + . = ROMVEC_START ; + .romvec : { + __rom_start = . ; + _romvec = .; + *(.data..initvect) + } > romvec +#endif + + .text : { + _text = .; + _stext = . ; + HEAD_TEXT + TEXT_TEXT + SCHED_TEXT + LOCK_TEXT + *(.text..lock) + + . = ALIGN(16); /* Exception table */ + __start___ex_table = .; + *(__ex_table) + __stop___ex_table = .; + + *(.rodata) *(.rodata.*) + *(__vermagic) /* Kernel version magic */ + *(__markers_strings) + *(.rodata1) + *(.rodata.str1.1) + + /* Kernel symbol table: Normal symbols */ + . = ALIGN(4); + __start___ksymtab = .; + *(__ksymtab) + __stop___ksymtab = .; + + /* Kernel symbol table: GPL-only symbols */ + __start___ksymtab_gpl = .; + *(__ksymtab_gpl) + __stop___ksymtab_gpl = .; + + /* Kernel symbol table: Normal unused symbols */ + __start___ksymtab_unused = .; + *(__ksymtab_unused) + __stop___ksymtab_unused = .; + + /* Kernel symbol table: GPL-only unused symbols */ + __start___ksymtab_unused_gpl = .; + *(__ksymtab_unused_gpl) + __stop___ksymtab_unused_gpl = .; + + /* Kernel symbol table: GPL-future symbols */ + __start___ksymtab_gpl_future = .; + *(__ksymtab_gpl_future) + __stop___ksymtab_gpl_future = .; + + /* Kernel symbol table: Normal symbols */ + __start___kcrctab = .; + *(__kcrctab) + __stop___kcrctab = .; + + /* Kernel symbol table: GPL-only symbols */ + __start___kcrctab_gpl = .; + *(__kcrctab_gpl) + __stop___kcrctab_gpl = .; + + /* Kernel symbol table: Normal unused symbols */ + __start___kcrctab_unused = .; + *(__kcrctab_unused) + __stop___kcrctab_unused = .; + + /* Kernel symbol table: GPL-only unused symbols */ + __start___kcrctab_unused_gpl = .; + *(__kcrctab_unused_gpl) + __stop___kcrctab_unused_gpl = .; + + /* Kernel symbol table: GPL-future symbols */ + __start___kcrctab_gpl_future = .; + *(__kcrctab_gpl_future) + __stop___kcrctab_gpl_future = .; + + /* Kernel symbol table: strings */ + *(__ksymtab_strings) + + /* Built-in module parameters */ + . = ALIGN(4) ; + __start___param = .; + *(__param) + __stop___param = .; + + /* Built-in module versions */ + . = ALIGN(4) ; + __start___modver = .; + *(__modver) + __stop___modver = .; + + . = ALIGN(4) ; + _etext = . ; + } > TEXT + + .data DATA_ADDR : { + . = ALIGN(4); + _sdata = . ; + DATA_DATA + CACHELINE_ALIGNED_DATA(32) + PAGE_ALIGNED_DATA(PAGE_SIZE) + *(.data..shared_aligned) + INIT_TASK_DATA(THREAD_SIZE) + _edata = . ; + } > DATA + + .init.text : { + . = ALIGN(PAGE_SIZE); + __init_begin = .; + } > INIT + INIT_TEXT_SECTION(PAGE_SIZE) > INIT + INIT_DATA_SECTION(16) > INIT + .init.data : { + . = ALIGN(PAGE_SIZE); + __init_end = .; + } > INIT + + .bss : { + . = ALIGN(4); + _sbss = . ; + *(.bss) + *(COMMON) + . = ALIGN(4) ; + _ebss = . ; + _end = . ; + } > BSSS + + DISCARDS +} + |
