diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 11:16:34 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 11:16:34 +0200 |
commit | 4b60eb8380a0b588a03b6052d7ac93e1964c75b8 (patch) | |
tree | 0b66caf260001230144ba3d09bde84d3bd58dc81 /arch/i386 | |
parent | 44f0257fc316ff4b33aa3438dd8d891b7d6d72b9 (diff) | |
download | op-kernel-dev-4b60eb8380a0b588a03b6052d7ac93e1964c75b8.zip op-kernel-dev-4b60eb8380a0b588a03b6052d7ac93e1964c75b8.tar.gz |
i386: move power
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/i386')
-rw-r--r-- | arch/i386/Makefile | 2 | ||||
-rw-r--r-- | arch/i386/power/Makefile | 2 | ||||
-rw-r--r-- | arch/i386/power/cpu.c | 133 | ||||
-rw-r--r-- | arch/i386/power/suspend.c | 172 | ||||
-rw-r--r-- | arch/i386/power/swsusp.S | 78 |
5 files changed, 1 insertions, 386 deletions
diff --git a/arch/i386/Makefile b/arch/i386/Makefile index 93492b3..da64799 100644 --- a/arch/i386/Makefile +++ b/arch/i386/Makefile @@ -110,7 +110,7 @@ drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/ drivers-$(CONFIG_PCI) += arch/i386/pci/ # must be linked after kernel/ drivers-$(CONFIG_OPROFILE) += arch/i386/oprofile/ -drivers-$(CONFIG_PM) += arch/i386/power/ +drivers-$(CONFIG_PM) += arch/x86/power/ drivers-$(CONFIG_FB) += arch/i386/video/ CFLAGS += $(mflags-y) diff --git a/arch/i386/power/Makefile b/arch/i386/power/Makefile deleted file mode 100644 index d764ec9..0000000 --- a/arch/i386/power/Makefile +++ /dev/null @@ -1,2 +0,0 @@ -obj-$(CONFIG_PM) += cpu.o -obj-$(CONFIG_HIBERNATION) += swsusp.o suspend.o diff --git a/arch/i386/power/cpu.c b/arch/i386/power/cpu.c deleted file mode 100644 index 998fd3e..0000000 --- a/arch/i386/power/cpu.c +++ /dev/null @@ -1,133 +0,0 @@ -/* - * Suspend support specific for i386. - * - * Distribute under GPLv2 - * - * Copyright (c) 2002 Pavel Machek <pavel@suse.cz> - * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org> - */ - -#include <linux/module.h> -#include <linux/suspend.h> -#include <asm/mtrr.h> -#include <asm/mce.h> - -static struct saved_context saved_context; - -unsigned long saved_context_ebx; -unsigned long saved_context_esp, saved_context_ebp; -unsigned long saved_context_esi, saved_context_edi; -unsigned long saved_context_eflags; - -void __save_processor_state(struct saved_context *ctxt) -{ - mtrr_save_fixed_ranges(NULL); - kernel_fpu_begin(); - - /* - * descriptor tables - */ - store_gdt(&ctxt->gdt); - store_idt(&ctxt->idt); - store_tr(ctxt->tr); - - /* - * segment registers - */ - savesegment(es, ctxt->es); - savesegment(fs, ctxt->fs); - savesegment(gs, ctxt->gs); - savesegment(ss, ctxt->ss); - - /* - * control registers - */ - ctxt->cr0 = read_cr0(); - ctxt->cr2 = read_cr2(); - ctxt->cr3 = read_cr3(); - ctxt->cr4 = read_cr4(); -} - -void save_processor_state(void) -{ - __save_processor_state(&saved_context); -} - -static void do_fpu_end(void) -{ - /* - * Restore FPU regs if necessary. - */ - kernel_fpu_end(); -} - -static void fix_processor_context(void) -{ - int cpu = smp_processor_id(); - struct tss_struct * t = &per_cpu(init_tss, cpu); - - set_tss_desc(cpu,t); /* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */ - - load_TR_desc(); /* This does ltr */ - load_LDT(¤t->active_mm->context); /* This does lldt */ - - /* - * Now maybe reload the debug registers - */ - if (current->thread.debugreg[7]){ - set_debugreg(current->thread.debugreg[0], 0); - set_debugreg(current->thread.debugreg[1], 1); - set_debugreg(current->thread.debugreg[2], 2); - set_debugreg(current->thread.debugreg[3], 3); - /* no 4 and 5 */ - set_debugreg(current->thread.debugreg[6], 6); - set_debugreg(current->thread.debugreg[7], 7); - } - -} - -void __restore_processor_state(struct saved_context *ctxt) -{ - /* - * control registers - */ - write_cr4(ctxt->cr4); - write_cr3(ctxt->cr3); - write_cr2(ctxt->cr2); - write_cr0(ctxt->cr0); - - /* - * now restore the descriptor tables to their proper values - * ltr is done i fix_processor_context(). - */ - load_gdt(&ctxt->gdt); - load_idt(&ctxt->idt); - - /* - * segment registers - */ - loadsegment(es, ctxt->es); - loadsegment(fs, ctxt->fs); - loadsegment(gs, ctxt->gs); - loadsegment(ss, ctxt->ss); - - /* - * sysenter MSRs - */ - if (boot_cpu_has(X86_FEATURE_SEP)) - enable_sep_cpu(); - - fix_processor_context(); - do_fpu_end(); - mtrr_ap_init(); - mcheck_init(&boot_cpu_data); -} - -void restore_processor_state(void) -{ - __restore_processor_state(&saved_context); -} - -/* Needed by apm.c */ -EXPORT_SYMBOL(save_processor_state); -EXPORT_SYMBOL(restore_processor_state); diff --git a/arch/i386/power/suspend.c b/arch/i386/power/suspend.c deleted file mode 100644 index a0020b9..0000000 --- a/arch/i386/power/suspend.c +++ /dev/null @@ -1,172 +0,0 @@ -/* - * Suspend support specific for i386 - temporary page tables - * - * Distribute under GPLv2 - * - * Copyright (c) 2006 Rafael J. Wysocki <rjw@sisk.pl> - */ - -#include <linux/suspend.h> -#include <linux/bootmem.h> - -#include <asm/system.h> -#include <asm/page.h> -#include <asm/pgtable.h> - -/* Defined in arch/i386/power/swsusp.S */ -extern int restore_image(void); - -/* References to section boundaries */ -extern const void __nosave_begin, __nosave_end; - -/* Pointer to the temporary resume page tables */ -pgd_t *resume_pg_dir; - -/* The following three functions are based on the analogous code in - * arch/i386/mm/init.c - */ - -/* - * Create a middle page table on a resume-safe page and put a pointer to it in - * the given global directory entry. This only returns the gd entry - * in non-PAE compilation mode, since the middle layer is folded. - */ -static pmd_t *resume_one_md_table_init(pgd_t *pgd) -{ - pud_t *pud; - pmd_t *pmd_table; - -#ifdef CONFIG_X86_PAE - pmd_table = (pmd_t *)get_safe_page(GFP_ATOMIC); - if (!pmd_table) - return NULL; - - set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT)); - pud = pud_offset(pgd, 0); - - BUG_ON(pmd_table != pmd_offset(pud, 0)); -#else - pud = pud_offset(pgd, 0); - pmd_table = pmd_offset(pud, 0); -#endif - - return pmd_table; -} - -/* - * Create a page table on a resume-safe page and place a pointer to it in - * a middle page directory entry. - */ -static pte_t *resume_one_page_table_init(pmd_t *pmd) -{ - if (pmd_none(*pmd)) { - pte_t *page_table = (pte_t *)get_safe_page(GFP_ATOMIC); - if (!page_table) - return NULL; - - set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE)); - - BUG_ON(page_table != pte_offset_kernel(pmd, 0)); - - return page_table; - } - - return pte_offset_kernel(pmd, 0); -} - -/* - * This maps the physical memory to kernel virtual address space, a total - * of max_low_pfn pages, by creating page tables starting from address - * PAGE_OFFSET. The page tables are allocated out of resume-safe pages. - */ -static int resume_physical_mapping_init(pgd_t *pgd_base) -{ - unsigned long pfn; - pgd_t *pgd; - pmd_t *pmd; - pte_t *pte; - int pgd_idx, pmd_idx; - - pgd_idx = pgd_index(PAGE_OFFSET); - pgd = pgd_base + pgd_idx; - pfn = 0; - - for (; pgd_idx < PTRS_PER_PGD; pgd++, pgd_idx++) { - pmd = resume_one_md_table_init(pgd); - if (!pmd) - return -ENOMEM; - - if (pfn >= max_low_pfn) - continue; - - for (pmd_idx = 0; pmd_idx < PTRS_PER_PMD; pmd++, pmd_idx++) { - if (pfn >= max_low_pfn) - break; - - /* Map with big pages if possible, otherwise create - * normal page tables. - * NOTE: We can mark everything as executable here - */ - if (cpu_has_pse) { - set_pmd(pmd, pfn_pmd(pfn, PAGE_KERNEL_LARGE_EXEC)); - pfn += PTRS_PER_PTE; - } else { - pte_t *max_pte; - - pte = resume_one_page_table_init(pmd); - if (!pte) - return -ENOMEM; - - max_pte = pte + PTRS_PER_PTE; - for (; pte < max_pte; pte++, pfn++) { - if (pfn >= max_low_pfn) - break; - - set_pte(pte, pfn_pte(pfn, PAGE_KERNEL_EXEC)); - } - } - } - } - return 0; -} - -static inline void resume_init_first_level_page_table(pgd_t *pg_dir) -{ -#ifdef CONFIG_X86_PAE - int i; - - /* Init entries of the first-level page table to the zero page */ - for (i = 0; i < PTRS_PER_PGD; i++) - set_pgd(pg_dir + i, - __pgd(__pa(empty_zero_page) | _PAGE_PRESENT)); -#endif -} - -int swsusp_arch_resume(void) -{ - int error; - - resume_pg_dir = (pgd_t *)get_safe_page(GFP_ATOMIC); - if (!resume_pg_dir) - return -ENOMEM; - - resume_init_first_level_page_table(resume_pg_dir); - error = resume_physical_mapping_init(resume_pg_dir); - if (error) - return error; - - /* We have got enough memory and from now on we cannot recover */ - restore_image(); - return 0; -} - -/* - * pfn_is_nosave - check if given pfn is in the 'nosave' section - */ - -int pfn_is_nosave(unsigned long pfn) -{ - unsigned long nosave_begin_pfn = __pa_symbol(&__nosave_begin) >> PAGE_SHIFT; - unsigned long nosave_end_pfn = PAGE_ALIGN(__pa_symbol(&__nosave_end)) >> PAGE_SHIFT; - return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); -} diff --git a/arch/i386/power/swsusp.S b/arch/i386/power/swsusp.S deleted file mode 100644 index 53662e0..0000000 --- a/arch/i386/power/swsusp.S +++ /dev/null @@ -1,78 +0,0 @@ -.text - -/* Originally gcc generated, modified by hand - * - * This may not use any stack, nor any variable that is not "NoSave": - * - * Its rewriting one kernel image with another. What is stack in "old" - * image could very well be data page in "new" image, and overwriting - * your own stack under you is bad idea. - */ - -#include <linux/linkage.h> -#include <asm/segment.h> -#include <asm/page.h> -#include <asm/asm-offsets.h> - - .text - -ENTRY(swsusp_arch_suspend) - - movl %esp, saved_context_esp - movl %ebx, saved_context_ebx - movl %ebp, saved_context_ebp - movl %esi, saved_context_esi - movl %edi, saved_context_edi - pushfl ; popl saved_context_eflags - - call swsusp_save - ret - -ENTRY(restore_image) - movl resume_pg_dir, %ecx - subl $__PAGE_OFFSET, %ecx - movl %ecx, %cr3 - - movl restore_pblist, %edx - .p2align 4,,7 - -copy_loop: - testl %edx, %edx - jz done - - movl pbe_address(%edx), %esi - movl pbe_orig_address(%edx), %edi - - movl $1024, %ecx - rep - movsl - - movl pbe_next(%edx), %edx - jmp copy_loop - .p2align 4,,7 - -done: - /* go back to the original page tables */ - movl $swapper_pg_dir, %ecx - subl $__PAGE_OFFSET, %ecx - movl %ecx, %cr3 - /* Flush TLB, including "global" things (vmalloc) */ - movl mmu_cr4_features, %eax - movl %eax, %edx - andl $~(1<<7), %edx; # PGE - movl %edx, %cr4; # turn off PGE - movl %cr3, %ecx; # flush TLB - movl %ecx, %cr3 - movl %eax, %cr4; # turn PGE back on - - movl saved_context_esp, %esp - movl saved_context_ebp, %ebp - movl saved_context_ebx, %ebx - movl saved_context_esi, %esi - movl saved_context_edi, %edi - - pushl saved_context_eflags ; popfl - - xorl %eax, %eax - - ret |