diff options
Diffstat (limited to 'arch/arm/mm')
43 files changed, 1183 insertions, 439 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 67f75a0..4cefb57 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -629,6 +629,23 @@ config IO_36 comment "Processor Features" +config ARM_LPAE + bool "Support for the Large Physical Address Extension" + depends on MMU && CPU_V7 + help + Say Y if you have an ARMv7 processor supporting the LPAE page + table format and you would like to access memory beyond the + 4GB limit. The resulting kernel image will not run on + processors without the LPA extension. + + If unsure, say N. + +config ARCH_PHYS_ADDR_T_64BIT + def_bool ARM_LPAE + +config ARCH_DMA_ADDR_T_64BIT + bool + config ARM_THUMB bool "Support Thumb user binaries" depends on CPU_ARM720T || CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_V6 || CPU_V6K || CPU_V7 || CPU_FEROCEON @@ -816,14 +833,23 @@ config CACHE_FEROCEON_L2_WRITETHROUGH Say Y here to use the Feroceon L2 cache in writethrough mode. Unless you specifically require this, say N for writeback mode. +config MIGHT_HAVE_CACHE_L2X0 + bool + help + This option should be selected by machines which have a L2x0 + or PL310 cache controller, but where its use is optional. + + The only effect of this option is to make CACHE_L2X0 and + related options available to the user for configuration. + + Boards or SoCs which always require the cache controller + support to be present should select CACHE_L2X0 directly + instead of this option, thus preventing the user from + inadvertently configuring a broken kernel. + config CACHE_L2X0 - bool "Enable the L2x0 outer cache controller" - depends on REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || MACH_REALVIEW_PB1176 || \ - REALVIEW_EB_A9MP || ARCH_IMX_V6_V7 || MACH_REALVIEW_PBX || \ - ARCH_NOMADIK || ARCH_OMAP4 || ARCH_EXYNOS4 || ARCH_TEGRA || \ - ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || ARCH_SHMOBILE || \ - ARCH_PRIMA2 || ARCH_ZYNQ || ARCH_CNS3XXX || ARCH_HIGHBANK - default y + bool "Enable the L2x0 outer cache controller" if MIGHT_HAVE_CACHE_L2X0 + default MIGHT_HAVE_CACHE_L2X0 select OUTER_CACHE select OUTER_CACHE_SYNC help diff --git a/arch/arm/mm/alignment.c b/arch/arm/mm/alignment.c index c335c76..caf14dc 100644 --- a/arch/arm/mm/alignment.c +++ b/arch/arm/mm/alignment.c @@ -968,7 +968,7 @@ static int __init alignment_init(void) ai_usermode = safe_usermode(ai_usermode, false); } - hook_fault_code(1, do_alignment, SIGBUS, BUS_ADRALN, + hook_fault_code(FAULT_CODE_ALIGNMENT, do_alignment, SIGBUS, BUS_ADRALN, "alignment exception"); /* diff --git a/arch/arm/mm/context.c b/arch/arm/mm/context.c index 93aac06..ee9bb36 100644 --- a/arch/arm/mm/context.c +++ b/arch/arm/mm/context.c @@ -22,6 +22,21 @@ unsigned int cpu_last_asid = ASID_FIRST_VERSION; DEFINE_PER_CPU(struct mm_struct *, current_mm); #endif +#ifdef CONFIG_ARM_LPAE +#define cpu_set_asid(asid) { \ + unsigned long ttbl, ttbh; \ + asm volatile( \ + " mrrc p15, 0, %0, %1, c2 @ read TTBR0\n" \ + " mov %1, %2, lsl #(48 - 32) @ set ASID\n" \ + " mcrr p15, 0, %0, %1, c2 @ set TTBR0\n" \ + : "=&r" (ttbl), "=&r" (ttbh) \ + : "r" (asid & ~ASID_MASK)); \ +} +#else +#define cpu_set_asid(asid) \ + asm(" mcr p15, 0, %0, c13, c0, 1\n" : : "r" (asid)) +#endif + /* * We fork()ed a process, and we need a new context for the child * to run in. We reserve version 0 for initial tasks so we will @@ -37,7 +52,7 @@ void __init_new_context(struct task_struct *tsk, struct mm_struct *mm) static void flush_context(void) { /* set the reserved ASID before flushing the TLB */ - asm("mcr p15, 0, %0, c13, c0, 1\n" : : "r" (0)); + cpu_set_asid(0); isb(); local_flush_tlb_all(); if (icache_is_vivt_asid_tagged()) { @@ -99,7 +114,7 @@ static void reset_context(void *info) set_mm_context(mm, asid); /* set the new ASID */ - asm("mcr p15, 0, %0, c13, c0, 1\n" : : "r" (mm->context.id)); + cpu_set_asid(mm->context.id); isb(); } diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index aa33949..bb7eac3 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -27,19 +27,6 @@ #include "fault.h" -/* - * Fault status register encodings. We steal bit 31 for our own purposes. - */ -#define FSR_LNX_PF (1 << 31) -#define FSR_WRITE (1 << 11) -#define FSR_FS4 (1 << 10) -#define FSR_FS3_0 (15) - -static inline int fsr_fs(unsigned int fsr) -{ - return (fsr & FSR_FS3_0) | (fsr & FSR_FS4) >> 6; -} - #ifdef CONFIG_MMU #ifdef CONFIG_KPROBES @@ -123,8 +110,10 @@ void show_pte(struct mm_struct *mm, unsigned long addr) pte = pte_offset_map(pmd, addr); printk(", *pte=%08llx", (long long)pte_val(*pte)); +#ifndef CONFIG_ARM_LPAE printk(", *ppte=%08llx", (long long)pte_val(pte[PTE_HWTABLE_PTRS])); +#endif pte_unmap(pte); } while(0); @@ -231,7 +220,7 @@ static inline bool access_error(unsigned int fsr, struct vm_area_struct *vma) static int __kprobes __do_page_fault(struct mm_struct *mm, unsigned long addr, unsigned int fsr, - struct task_struct *tsk) + unsigned int flags, struct task_struct *tsk) { struct vm_area_struct *vma; int fault; @@ -253,18 +242,7 @@ good_area: goto out; } - /* - * If for any reason at all we couldn't handle the fault, make - * sure we exit gracefully rather than endlessly redo the fault. - */ - fault = handle_mm_fault(mm, vma, addr & PAGE_MASK, (fsr & FSR_WRITE) ? FAULT_FLAG_WRITE : 0); - if (unlikely(fault & VM_FAULT_ERROR)) - return fault; - if (fault & VM_FAULT_MAJOR) - tsk->maj_flt++; - else - tsk->min_flt++; - return fault; + return handle_mm_fault(mm, vma, addr & PAGE_MASK, flags); check_stack: if (vma->vm_flags & VM_GROWSDOWN && !expand_stack(vma, addr)) @@ -279,6 +257,9 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) struct task_struct *tsk; struct mm_struct *mm; int fault, sig, code; + int write = fsr & FSR_WRITE; + unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE | + (write ? FAULT_FLAG_WRITE : 0); if (notify_page_fault(regs, fsr)) return 0; @@ -305,6 +286,7 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) if (!down_read_trylock(&mm->mmap_sem)) { if (!user_mode(regs) && !search_exception_tables(regs->ARM_pc)) goto no_context; +retry: down_read(&mm->mmap_sem); } else { /* @@ -320,14 +302,41 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) #endif } - fault = __do_page_fault(mm, addr, fsr, tsk); - up_read(&mm->mmap_sem); + fault = __do_page_fault(mm, addr, fsr, flags, tsk); + + /* If we need to retry but a fatal signal is pending, handle the + * signal first. We do not need to release the mmap_sem because + * it would already be released in __lock_page_or_retry in + * mm/filemap.c. */ + if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) + return 0; + + /* + * Major/minor page fault accounting is only done on the + * initial attempt. If we go through a retry, it is extremely + * likely that the page will be found in page cache at that point. + */ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, addr); - if (fault & VM_FAULT_MAJOR) - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs, addr); - else if (fault & VM_FAULT_MINOR) - perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs, addr); + if (flags & FAULT_FLAG_ALLOW_RETRY) { + if (fault & VM_FAULT_MAJOR) { + tsk->maj_flt++; + perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, + regs, addr); + } else { + tsk->min_flt++; + perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, + regs, addr); + } + if (fault & VM_FAULT_RETRY) { + /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk + * of starvation. */ + flags &= ~FAULT_FLAG_ALLOW_RETRY; + goto retry; + } + } + + up_read(&mm->mmap_sem); /* * Handle the "normal" case first - VM_FAULT_MAJOR / VM_FAULT_MINOR @@ -441,6 +450,12 @@ do_translation_fault(unsigned long addr, unsigned int fsr, pmd = pmd_offset(pud, addr); pmd_k = pmd_offset(pud_k, addr); +#ifdef CONFIG_ARM_LPAE + /* + * Only one hardware entry per PMD with LPAE. + */ + index = 0; +#else /* * On ARM one Linux PGD entry contains two hardware entries (see page * tables layout in pgtable.h). We normally guarantee that we always @@ -450,6 +465,7 @@ do_translation_fault(unsigned long addr, unsigned int fsr, * for the first of pair. */ index = (addr >> SECTION_SHIFT) & 1; +#endif if (pmd_none(pmd_k[index])) goto bad_area; @@ -489,55 +505,20 @@ do_bad(unsigned long addr, unsigned int fsr, struct pt_regs *regs) return 1; } -static struct fsr_info { +struct fsr_info { int (*fn)(unsigned long addr, unsigned int fsr, struct pt_regs *regs); int sig; int code; const char *name; -} fsr_info[] = { - /* - * The following are the standard ARMv3 and ARMv4 aborts. ARMv5 - * defines these to be "precise" aborts. - */ - { do_bad, SIGSEGV, 0, "vector exception" }, - { do_bad, SIGBUS, BUS_ADRALN, "alignment exception" }, - { do_bad, SIGKILL, 0, "terminal exception" }, - { do_bad, SIGBUS, BUS_ADRALN, "alignment exception" }, - { do_bad, SIGBUS, 0, "external abort on linefetch" }, - { do_translation_fault, SIGSEGV, SEGV_MAPERR, "section translation fault" }, - { do_bad, SIGBUS, 0, "external abort on linefetch" }, - { do_page_fault, SIGSEGV, SEGV_MAPERR, "page translation fault" }, - { do_bad, SIGBUS, 0, "external abort on non-linefetch" }, - { do_bad, SIGSEGV, SEGV_ACCERR, "section domain fault" }, - { do_bad, SIGBUS, 0, "external abort on non-linefetch" }, - { do_bad, SIGSEGV, SEGV_ACCERR, "page domain fault" }, - { do_bad, SIGBUS, 0, "external abort on translation" }, - { do_sect_fault, SIGSEGV, SEGV_ACCERR, "section permission fault" }, - { do_bad, SIGBUS, 0, "external abort on translation" }, - { do_page_fault, SIGSEGV, SEGV_ACCERR, "page permission fault" }, - /* - * The following are "imprecise" aborts, which are signalled by bit - * 10 of the FSR, and may not be recoverable. These are only - * supported if the CPU abort handler supports bit 10. - */ - { do_bad, SIGBUS, 0, "unknown 16" }, - { do_bad, SIGBUS, 0, "unknown 17" }, - { do_bad, SIGBUS, 0, "unknown 18" }, - { do_bad, SIGBUS, 0, "unknown 19" }, - { do_bad, SIGBUS, 0, "lock abort" }, /* xscale */ - { do_bad, SIGBUS, 0, "unknown 21" }, - { do_bad, SIGBUS, BUS_OBJERR, "imprecise external abort" }, /* xscale */ - { do_bad, SIGBUS, 0, "unknown 23" }, - { do_bad, SIGBUS, 0, "dcache parity error" }, /* xscale */ - { do_bad, SIGBUS, 0, "unknown 25" }, - { do_bad, SIGBUS, 0, "unknown 26" }, - { do_bad, SIGBUS, 0, "unknown 27" }, - { do_bad, SIGBUS, 0, "unknown 28" }, - { do_bad, SIGBUS, 0, "unknown 29" }, - { do_bad, SIGBUS, 0, "unknown 30" }, - { do_bad, SIGBUS, 0, "unknown 31" } }; +/* FSR definition */ +#ifdef CONFIG_ARM_LPAE +#include "fsr-3level.c" +#else +#include "fsr-2level.c" +#endif + void __init hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int, struct pt_regs *), int sig, int code, const char *name) @@ -573,42 +554,6 @@ do_DataAbort(unsigned long addr, unsigned int fsr, struct pt_regs *regs) arm_notify_die("", regs, &info, fsr, 0); } - -static struct fsr_info ifsr_info[] = { - { do_bad, SIGBUS, 0, "unknown 0" }, - { do_bad, SIGBUS, 0, "unknown 1" }, - { do_bad, SIGBUS, 0, "debug event" }, - { do_bad, SIGSEGV, SEGV_ACCERR, "section access flag fault" }, - { do_bad, SIGBUS, 0, "unknown 4" }, - { do_translation_fault, SIGSEGV, SEGV_MAPERR, "section translation fault" }, - { do_bad, SIGSEGV, SEGV_ACCERR, "page access flag fault" }, - { do_page_fault, SIGSEGV, SEGV_MAPERR, "page translation fault" }, - { do_bad, SIGBUS, 0, "external abort on non-linefetch" }, - { do_bad, SIGSEGV, SEGV_ACCERR, "section domain fault" }, - { do_bad, SIGBUS, 0, "unknown 10" }, - { do_bad, SIGSEGV, SEGV_ACCERR, "page domain fault" }, - { do_bad, SIGBUS, 0, "external abort on translation" }, - { do_sect_fault, SIGSEGV, SEGV_ACCERR, "section permission fault" }, - { do_bad, SIGBUS, 0, "external abort on translation" }, - { do_page_fault, SIGSEGV, SEGV_ACCERR, "page permission fault" }, - { do_bad, SIGBUS, 0, "unknown 16" }, - { do_bad, SIGBUS, 0, "unknown 17" }, - { do_bad, SIGBUS, 0, "unknown 18" }, - { do_bad, SIGBUS, 0, "unknown 19" }, - { do_bad, SIGBUS, 0, "unknown 20" }, - { do_bad, SIGBUS, 0, "unknown 21" }, - { do_bad, SIGBUS, 0, "unknown 22" }, - { do_bad, SIGBUS, 0, "unknown 23" }, - { do_bad, SIGBUS, 0, "unknown 24" }, - { do_bad, SIGBUS, 0, "unknown 25" }, - { do_bad, SIGBUS, 0, "unknown 26" }, - { do_bad, SIGBUS, 0, "unknown 27" }, - { do_bad, SIGBUS, 0, "unknown 28" }, - { do_bad, SIGBUS, 0, "unknown 29" }, - { do_bad, SIGBUS, 0, "unknown 30" }, - { do_bad, SIGBUS, 0, "unknown 31" }, -}; - void __init hook_ifault_code(int nr, int (*fn)(unsigned long, unsigned int, struct pt_regs *), int sig, int code, const char *name) @@ -641,6 +586,7 @@ do_PrefetchAbort(unsigned long addr, unsigned int ifsr, struct pt_regs *regs) arm_notify_die("", regs, &info, ifsr, 0); } +#ifndef CONFIG_ARM_LPAE static int __init exceptions_init(void) { if (cpu_architecture() >= CPU_ARCH_ARMv6) { @@ -663,3 +609,4 @@ static int __init exceptions_init(void) } arch_initcall(exceptions_init); +#endif diff --git a/arch/arm/mm/fault.h b/arch/arm/mm/fault.h index 49e9e38..cf08bdf 100644 --- a/arch/arm/mm/fault.h +++ b/arch/arm/mm/fault.h @@ -1,3 +1,28 @@ -void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs); +#ifndef __ARCH_ARM_FAULT_H +#define __ARCH_ARM_FAULT_H + +/* + * Fault status register encodings. We steal bit 31 for our own purposes. + */ +#define FSR_LNX_PF (1 << 31) +#define FSR_WRITE (1 << 11) +#define FSR_FS4 (1 << 10) +#define FSR_FS3_0 (15) +#define FSR_FS5_0 (0x3f) + +#ifdef CONFIG_ARM_LPAE +static inline int fsr_fs(unsigned int fsr) +{ + return fsr & FSR_FS5_0; +} +#else +static inline int fsr_fs(unsigned int fsr) +{ + return (fsr & FSR_FS3_0) | (fsr & FSR_FS4) >> 6; +} +#endif +void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs); unsigned long search_exception_table(unsigned long addr); + +#endif /* __ARCH_ARM_FAULT_H */ diff --git a/arch/arm/mm/fsr-2level.c b/arch/arm/mm/fsr-2level.c new file mode 100644 index 0000000..18ca74c --- /dev/null +++ b/arch/arm/mm/fsr-2level.c @@ -0,0 +1,78 @@ +static struct fsr_info fsr_info[] = { + /* + * The following are the standard ARMv3 and ARMv4 aborts. ARMv5 + * defines these to be "precise" aborts. + */ + { do_bad, SIGSEGV, 0, "vector exception" }, + { do_bad, SIGBUS, BUS_ADRALN, "alignment exception" }, + { do_bad, SIGKILL, 0, "terminal exception" }, + { do_bad, SIGBUS, BUS_ADRALN, "alignment exception" }, + { do_bad, SIGBUS, 0, "external abort on linefetch" }, + { do_translation_fault, SIGSEGV, SEGV_MAPERR, "section translation fault" }, + { do_bad, SIGBUS, 0, "external abort on linefetch" }, + { do_page_fault, SIGSEGV, SEGV_MAPERR, "page translation fault" }, + { do_bad, SIGBUS, 0, "external abort on non-linefetch" }, + { do_bad, SIGSEGV, SEGV_ACCERR, "section domain fault" }, + { do_bad, SIGBUS, 0, "external abort on non-linefetch" }, + { do_bad, SIGSEGV, SEGV_ACCERR, "page domain fault" }, + { do_bad, SIGBUS, 0, "external abort on translation" }, + { do_sect_fault, SIGSEGV, SEGV_ACCERR, "section permission fault" }, + { do_bad, SIGBUS, 0, "external abort on translation" }, + { do_page_fault, SIGSEGV, SEGV_ACCERR, "page permission fault" }, + /* + * The following are "imprecise" aborts, which are signalled by bit + * 10 of the FSR, and may not be recoverable. These are only + * supported if the CPU abort handler supports bit 10. + */ + { do_bad, SIGBUS, 0, "unknown 16" }, + { do_bad, SIGBUS, 0, "unknown 17" }, + { do_bad, SIGBUS, 0, "unknown 18" }, + { do_bad, SIGBUS, 0, "unknown 19" }, + { do_bad, SIGBUS, 0, "lock abort" }, /* xscale */ + { do_bad, SIGBUS, 0, "unknown 21" }, + { do_bad, SIGBUS, BUS_OBJERR, "imprecise external abort" }, /* xscale */ + { do_bad, SIGBUS, 0, "unknown 23" }, + { do_bad, SIGBUS, 0, "dcache parity error" }, /* xscale */ + { do_bad, SIGBUS, 0, "unknown 25" }, + { do_bad, SIGBUS, 0, "unknown 26" }, + { do_bad, SIGBUS, 0, "unknown 27" }, + { do_bad, SIGBUS, 0, "unknown 28" }, + { do_bad, SIGBUS, 0, "unknown 29" }, + { do_bad, SIGBUS, 0, "unknown 30" }, + { do_bad, SIGBUS, 0, "unknown 31" }, +}; + +static struct fsr_info ifsr_info[] = { + { do_bad, SIGBUS, 0, "unknown 0" }, + { do_bad, SIGBUS, 0, "unknown 1" }, + { do_bad, SIGBUS, 0, "debug event" }, + { do_bad, SIGSEGV, SEGV_ACCERR, "section access flag fault" }, + { do_bad, SIGBUS, 0, "unknown 4" }, + { do_translation_fault, SIGSEGV, SEGV_MAPERR, "section translation fault" }, + { do_bad, SIGSEGV, SEGV_ACCERR, "page access flag fault" }, + { do_page_fault, SIGSEGV, SEGV_MAPERR, "page translation fault" }, + { do_bad, SIGBUS, 0, "external abort on non-linefetch" }, + { do_bad, SIGSEGV, SEGV_ACCERR, "section domain fault" }, + { do_bad, SIGBUS, 0, "unknown 10" }, + { do_bad, SIGSEGV, SEGV_ACCERR, "page domain fault" }, + { do_bad, SIGBUS, 0, "external abort on translation" }, + { do_sect_fault, SIGSEGV, SEGV_ACCERR, "section permission fault" }, + { do_bad, SIGBUS, 0, "external abort on translation" }, + { do_page_fault, SIGSEGV, SEGV_ACCERR, "page permission fault" }, + { do_bad, SIGBUS, 0, "unknown 16" }, + { do_bad, SIGBUS, 0, "unknown 17" }, + { do_bad, SIGBUS, 0, "unknown 18" }, + { do_bad, SIGBUS, 0, "unknown 19" }, + { do_bad, SIGBUS, 0, "unknown 20" }, + { do_bad, SIGBUS, 0, "unknown 21" }, + { do_bad, SIGBUS, 0, "unknown 22" }, + { do_bad, SIGBUS, 0, "unknown 23" }, + { do_bad, SIGBUS, 0, "unknown 24" }, + { do_bad, SIGBUS, 0, "unknown 25" }, + { do_bad, SIGBUS, 0, "unknown 26" }, + { do_bad, SIGBUS, 0, "unknown 27" }, + { do_bad, SIGBUS, 0, "unknown 28" }, + { do_bad, SIGBUS, 0, "unknown 29" }, + { do_bad, SIGBUS, 0, "unknown 30" }, + { do_bad, SIGBUS, 0, "unknown 31" }, +}; diff --git a/arch/arm/mm/fsr-3level.c b/arch/arm/mm/fsr-3level.c new file mode 100644 index 0000000..05a4e94 --- /dev/null +++ b/arch/arm/mm/fsr-3level.c @@ -0,0 +1,68 @@ +static struct fsr_info fsr_info[] = { + { do_bad, SIGBUS, 0, "unknown 0" }, + { do_bad, SIGBUS, 0, "unknown 1" }, + { do_bad, SIGBUS, 0, "unknown 2" }, + { do_bad, SIGBUS, 0, "unknown 3" }, + { do_bad, SIGBUS, 0, "reserved translation fault" }, + { do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 1 translation fault" }, + { do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 2 translation fault" }, + { do_page_fault, SIGSEGV, SEGV_MAPERR, "level 3 translation fault" }, + { do_bad, SIGBUS, 0, "reserved access flag fault" }, + { do_bad, SIGSEGV, SEGV_ACCERR, "level 1 access flag fault" }, + { do_bad, SIGSEGV, SEGV_ACCERR, "level 2 access flag fault" }, + { do_page_fault, SIGSEGV, SEGV_ACCERR, "level 3 access flag fault" }, + { do_bad, SIGBUS, 0, "reserved permission fault" }, + { do_bad, SIGSEGV, SEGV_ACCERR, "level 1 permission fault" }, + { do_sect_fault, SIGSEGV, SEGV_ACCERR, "level 2 permission fault" }, + { do_page_fault, SIGSEGV, SEGV_ACCERR, "level 3 permission fault" }, + { do_bad, SIGBUS, 0, "synchronous external abort" }, + { do_bad, SIGBUS, 0, "asynchronous external abort" }, + { do_bad, SIGBUS, 0, "unknown 18" }, + { do_bad, SIGBUS, 0, "unknown 19" }, + { do_bad, SIGBUS, 0, "synchronous abort (translation table walk)" }, + { do_bad, SIGBUS, 0, "synchronous abort (translation table walk)" }, + { do_bad, SIGBUS, 0, "synchronous abort (translation table walk)" }, + { do_bad, SIGBUS, 0, "synchronous abort (translation table walk)" }, + { do_bad, SIGBUS, 0, "synchronous parity error" }, + { do_bad, SIGBUS, 0, "asynchronous parity error" }, + { do_bad, SIGBUS, 0, "unknown 26" }, + { do_bad, SIGBUS, 0, "unknown 27" }, + { do_bad, SIGBUS, 0, "synchronous parity error (translation table walk" }, + { do_bad, SIGBUS, 0, "synchronous parity error (translation table walk" }, + { do_bad, SIGBUS, 0, "synchronous parity error (translation table walk" }, + { do_bad, SIGBUS, 0, "synchronous parity error (translation table walk" }, + { do_bad, SIGBUS, 0, "unknown 32" }, + { do_bad, SIGBUS, BUS_ADRALN, "alignment fault" }, + { do_bad, SIGBUS, 0, "debug event" }, + { do_bad, SIGBUS, 0, "unknown 35" }, + { do_bad, SIGBUS, 0, "unknown 36" }, + { do_bad, SIGBUS, 0, "unknown 37" }, + { do_bad, SIGBUS, 0, "unknown 38" }, + { do_bad, SIGBUS, 0, "unknown 39" }, + { do_bad, SIGBUS, 0, "unknown 40" }, + { do_bad, SIGBUS, 0, "unknown 41" }, + { do_bad, SIGBUS, 0, "unknown 42" }, + { do_bad, SIGBUS, 0, "unknown 43" }, + { do_bad, SIGBUS, 0, "unknown 44" }, + { do_bad, SIGBUS, 0, "unknown 45" }, + { do_bad, SIGBUS, 0, "unknown 46" }, + { do_bad, SIGBUS, 0, "unknown 47" }, + { do_bad, SIGBUS, 0, "unknown 48" }, + { do_bad, SIGBUS, 0, "unknown 49" }, + { do_bad, SIGBUS, 0, "unknown 50" }, + { do_bad, SIGBUS, 0, "unknown 51" }, + { do_bad, SIGBUS, 0, "implementation fault (lockdown abort)" }, + { do_bad, SIGBUS, 0, "unknown 53" }, + { do_bad, SIGBUS, 0, "unknown 54" }, + { do_bad, SIGBUS, 0, "unknown 55" }, + { do_bad, SIGBUS, 0, "unknown 56" }, + { do_bad, SIGBUS, 0, "unknown 57" }, + { do_bad, SIGBUS, 0, "implementation fault (coprocessor abort)" }, + { do_bad, SIGBUS, 0, "unknown 59" }, + { do_bad, SIGBUS, 0, "unknown 60" }, + { do_bad, SIGBUS, 0, "unknown 61" }, + { do_bad, SIGBUS, 0, "unknown 62" }, + { do_bad, SIGBUS, 0, "unknown 63" }, +}; + +#define ifsr_info fsr_info diff --git a/arch/arm/mm/idmap.c b/arch/arm/mm/idmap.c index 2be9139..feacf4c 100644 --- a/arch/arm/mm/idmap.c +++ b/arch/arm/mm/idmap.c @@ -1,9 +1,38 @@ #include <linux/kernel.h> #include <asm/cputype.h> +#include <asm/idmap.h> #include <asm/pgalloc.h> #include <asm/pgtable.h> +#include <asm/sections.h> +pgd_t *idmap_pgd; + +#ifdef CONFIG_ARM_LPAE +static void idmap_add_pmd(pud_t *pud, unsigned long addr, unsigned long end, + unsigned long prot) +{ + pmd_t *pmd; + unsigned long next; + + if (pud_none_or_clear_bad(pud) || (pud_val(*pud) & L_PGD_SWAPPER)) { + pmd = pmd_alloc_one(&init_mm, addr); + if (!pmd) { + pr_warning("Failed to allocate identity pmd.\n"); + return; + } + pud_populate(&init_mm, pud, pmd); + pmd += pmd_index(addr); + } else + pmd = pmd_offset(pud, addr); + + do { + next = pmd_addr_end(addr, end); + *pmd = __pmd((addr & PMD_MASK) | prot); + flush_pmd_entry(pmd); + } while (pmd++, addr = next, addr != end); +} +#else /* !CONFIG_ARM_LPAE */ static void idmap_add_pmd(pud_t *pud, unsigned long addr, unsigned long end, unsigned long prot) { @@ -15,6 +44,7 @@ static void idmap_add_pmd(pud_t *pud, unsigned long addr, unsigned long end, pmd[1] = __pmd(addr); flush_pmd_entry(pmd); } +#endif /* CONFIG_ARM_LPAE */ static void idmap_add_pud(pgd_t *pgd, unsigned long addr, unsigned long end, unsigned long prot) @@ -28,11 +58,11 @@ static void idmap_add_pud(pgd_t *pgd, unsigned long addr, unsigned long end, } while (pud++, addr = next, addr != end); } -void identity_mapping_add(pgd_t *pgd, unsigned long addr, unsigned long end) +static void identity_mapping_add(pgd_t *pgd, unsigned long addr, unsigned long end) { unsigned long prot, next; - prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE; + prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AF; if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale()) prot |= PMD_BIT4; @@ -43,48 +73,41 @@ void identity_mapping_add(pgd_t *pgd, unsigned long addr, unsigned long end) } while (pgd++, addr = next, addr != end); } -#ifdef CONFIG_SMP -static void idmap_del_pmd(pud_t *pud, unsigned long addr, unsigned long end) -{ - pmd_t *pmd = pmd_offset(pud, addr); - pmd_clear(pmd); -} +extern char __idmap_text_start[], __idmap_text_end[]; -static void idmap_del_pud(pgd_t *pgd, unsigned long addr, unsigned long end) +static int __init init_static_idmap(void) { - pud_t *pud = pud_offset(pgd, addr); - unsigned long next; + phys_addr_t idmap_start, idmap_end; - do { - next = pud_addr_end(addr, end); - idmap_del_pmd(pud, addr, next); - } while (pud++, addr = next, addr != end); -} + idmap_pgd = pgd_alloc(&init_mm); + if (!idmap_pgd) + return -ENOMEM; -void identity_mapping_del(pgd_t *pgd, unsigned long addr, unsigned long end) -{ - unsigned long next; + /* Add an identity mapping for the physical address of the section. */ + idmap_start = virt_to_phys((void *)__idmap_text_start); + idmap_end = virt_to_phys((void *)__idmap_text_end); - pgd += pgd_index(addr); - do { - next = pgd_addr_end(addr, end); - idmap_del_pud(pgd, addr, next); - } while (pgd++, addr = next, addr != end); + pr_info("Setting up static identity map for 0x%llx - 0x%llx\n", + (long long)idmap_start, (long long)idmap_end); + identity_mapping_add(idmap_pgd, idmap_start, idmap_end); + + return 0; } -#endif +early_initcall(init_static_idmap); /* - * In order to soft-boot, we need to insert a 1:1 mapping in place of - * the user-mode pages. This will then ensure that we have predictable - * results when turning the mmu off + * In order to soft-boot, we need to switch to a 1:1 mapping for the + * cpu_reset functions. This will then ensure that we have predictable + * results when turning off the mmu. */ -void setup_mm_for_reboot(char mode) +void setup_mm_for_reboot(void) { - /* - * We need to access to user-mode page tables here. For kernel threads - * we don't have any user-mode mappings so we use the context that we - * "borrowed". - */ - identity_mapping_add(current->active_mm->pgd, 0, TASK_SIZE); + /* Clean and invalidate L1. */ + flush_cache_all(); + + /* Switch to the identity mapping. */ + cpu_switch_mm(idmap_pgd, &init_mm); + + /* Flush the TLB. */ local_flush_tlb_all(); } diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index fbdd12e..6ec1226 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -20,9 +20,9 @@ #include <linux/highmem.h> #include <linux/gfp.h> #include <linux/memblock.h> -#include <linux/sort.h> #include <asm/mach-types.h> +#include <asm/memblock.h> #include <asm/prom.h> #include <asm/sections.h> #include <asm/setup.h> @@ -32,6 +32,7 @@ #include <asm/mach/arch.h> #include <asm/mach/map.h> +#include <asm/memblock.h> #include "mm.h" @@ -134,30 +135,18 @@ void show_mem(unsigned int filter) } static void __init find_limits(unsigned long *min, unsigned long *max_low, - unsigned long *max_high) + unsigned long *max_high) { struct meminfo *mi = &meminfo; int i; - *min = -1UL; - *max_low = *max_high = 0; - - for_each_bank (i, mi) { - struct membank *bank = &mi->bank[i]; - unsigned long start, end; - - start = bank_pfn_start(bank); - end = bank_pfn_end(bank); - - if (*min > start) - *min = start; - if (*max_high < end) - *max_high = end; - if (bank->highmem) - continue; - if (*max_low < end) - *max_low = end; - } + /* This assumes the meminfo array is properly sorted */ + *min = bank_pfn_start(&mi->bank[0]); + for_each_bank (i, mi) + if (mi->bank[i].highmem) + break; + *max_low = bank_pfn_end(&mi->bank[i - 1]); + *max_high = bank_pfn_end(&mi->bank[mi->nr_banks - 1]); } static void __init arm_bootmem_init(unsigned long start_pfn, @@ -319,20 +308,25 @@ static void arm_memory_present(void) } #endif -static int __init meminfo_cmp(const void *_a, const void *_b) +static bool arm_memblock_steal_permitted = true; + +phys_addr_t arm_memblock_steal(phys_addr_t size, phys_addr_t align) { - const struct membank *a = _a, *b = _b; - long cmp = bank_pfn_start(a) - bank_pfn_start(b); - return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; + phys_addr_t phys; + + BUG_ON(!arm_memblock_steal_permitted); + + phys = memblock_alloc(size, align); + memblock_free(phys, size); + memblock_remove(phys, size); + + return phys; } void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc) { int i; - sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL); - - memblock_init(); for (i = 0; i < mi->nr_banks; i++) memblock_add(mi->bank[i].start, mi->bank[i].size); @@ -371,7 +365,8 @@ void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc) if (mdesc->reserve) mdesc->reserve(); - memblock_analyze(); + arm_memblock_steal_permitted = false; + memblock_allow_resize(); memblock_dump_all(); } @@ -403,8 +398,6 @@ void __init bootmem_init(void) */ arm_bootmem_free(min, max_low, max_high); - high_memory = __va(((phys_addr_t)max_low << PAGE_SHIFT) - 1) + 1; - /* * This doesn't seem to be used by the Linux memory manager any * more, but is used by ll_rw_block. If we can get rid of it, we diff --git a/arch/arm/mm/iomap.c b/arch/arm/mm/iomap.c index 430df1a..e62956e 100644 --- a/arch/arm/mm/iomap.c +++ b/arch/arm/mm/iomap.c @@ -35,27 +35,6 @@ EXPORT_SYMBOL(pcibios_min_mem); unsigned int pci_flags = PCI_REASSIGN_ALL_RSRC; EXPORT_SYMBOL(pci_flags); -void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) -{ - resource_size_t start = pci_resource_start(dev, bar); - resource_size_t len = pci_resource_len(dev, bar); - unsigned long flags = pci_resource_flags(dev, bar); - - if (!len || !start) - return NULL; - if (maxlen && len > maxlen) - len = maxlen; - if (flags & IORESOURCE_IO) - return ioport_map(start, len); - if (flags & IORESOURCE_MEM) { - if (flags & IORESOURCE_CACHEABLE) - return ioremap(start, len); - return ioremap_nocache(start, len); - } - return NULL; -} -EXPORT_SYMBOL(pci_iomap); - void pci_iounmap(struct pci_dev *dev, void __iomem *addr) { if ((unsigned long)addr >= VMALLOC_START && diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c index bdb248c..80632e8 100644 --- a/arch/arm/mm/ioremap.c +++ b/arch/arm/mm/ioremap.c @@ -36,12 +36,6 @@ #include <asm/mach/map.h> #include "mm.h" -/* - * Used by ioremap() and iounmap() code to mark (super)section-mapped - * I/O regions in vm_struct->flags field. - */ -#define VM_ARM_SECTION_MAPPING 0x80000000 - int ioremap_page(unsigned long virt, unsigned long phys, const struct mem_type *mtype) { @@ -64,7 +58,7 @@ void __check_kvm_seq(struct mm_struct *mm) } while (seq != init_mm.context.kvm_seq); } -#ifndef CONFIG_SMP +#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE) /* * Section support is unsafe on SMP - If you iounmap and ioremap a region, * the other CPUs will not see this change until their next context switch. @@ -79,13 +73,16 @@ static void unmap_area_sections(unsigned long virt, unsigned long size) { unsigned long addr = virt, end = virt + (size & ~(SZ_1M - 1)); pgd_t *pgd; + pud_t *pud; + pmd_t *pmdp; flush_cache_vunmap(addr, end); pgd = pgd_offset_k(addr); + pud = pud_offset(pgd, addr); + pmdp = pmd_offset(pud, addr); do { - pmd_t pmd, *pmdp = pmd_offset(pgd, addr); + pmd_t pmd = *pmdp; - pmd = *pmdp; if (!pmd_none(pmd)) { /* * Clear the PMD from the page table, and @@ -104,8 +101,8 @@ static void unmap_area_sections(unsigned long virt, unsigned long size) pte_free_kernel(&init_mm, pmd_page_vaddr(pmd)); } - addr += PGDIR_SIZE; - pgd++; + addr += PMD_SIZE; + pmdp += 2; } while (addr < end); /* @@ -124,6 +121,8 @@ remap_area_sections(unsigned long virt, unsigned long pfn, { unsigned long addr = virt, end = virt + size; pgd_t *pgd; + pud_t *pud; + pmd_t *pmd; /* * Remove and free any PTE-based mapping, and @@ -132,17 +131,17 @@ remap_area_sections(unsigned long virt, unsigned long pfn, unmap_area_sections(virt, size); pgd = pgd_offset_k(addr); + pud = pud_offset(pgd, addr); + pmd = pmd_offset(pud, addr); do { - pmd_t *pmd = pmd_offset(pgd, addr); - pmd[0] = __pmd(__pfn_to_phys(pfn) | type->prot_sect); pfn += SZ_1M >> PAGE_SHIFT; pmd[1] = __pmd(__pfn_to_phys(pfn) | type->prot_sect); pfn += SZ_1M >> PAGE_SHIFT; flush_pmd_entry(pmd); - addr += PGDIR_SIZE; - pgd++; + addr += PMD_SIZE; + pmd += 2; } while (addr < end); return 0; @@ -154,6 +153,8 @@ remap_area_supersections(unsigned long virt, unsigned long pfn, { unsigned long addr = virt, end = virt + size; pgd_t *pgd; + pud_t *pud; + pmd_t *pmd; /* * Remove and free any PTE-based mapping, and @@ -162,6 +163,8 @@ remap_area_supersections(unsigned long virt, unsigned long pfn, unmap_area_sections(virt, size); pgd = pgd_offset_k(virt); + pud = pud_offset(pgd, addr); + pmd = pmd_offset(pud, addr); do { unsigned long super_pmd_val, i; @@ -170,14 +173,12 @@ remap_area_supersections(unsigned long virt, unsigned long pfn, super_pmd_val |= ((pfn >> (32 - PAGE_SHIFT)) & 0xf) << 20; for (i = 0; i < 8; i++) { - pmd_t *pmd = pmd_offset(pgd, addr); - pmd[0] = __pmd(super_pmd_val); pmd[1] = __pmd(super_pmd_val); flush_pmd_entry(pmd); - addr += PGDIR_SIZE; - pgd++; + addr += PMD_SIZE; + pmd += 2; } pfn += SUPERSECTION_SIZE >> PAGE_SHIFT; @@ -195,17 +196,13 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn, unsigned long addr; struct vm_struct * area; +#ifndef CONFIG_ARM_LPAE /* * High mappings must be supersection aligned */ if (pfn >= 0x100000 && (__pfn_to_phys(pfn) & ~SUPERSECTION_MASK)) return NULL; - - /* - * Don't allow RAM to be mapped - this causes problems with ARMv6+ - */ - if (WARN_ON(pfn_valid(pfn))) - return NULL; +#endif type = get_mem_type(mtype); if (!type) @@ -216,12 +213,40 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn, */ size = PAGE_ALIGN(offset + size); + /* + * Try to reuse one of the static mapping whenever possible. + */ + read_lock(&vmlist_lock); + for (area = vmlist; area; area = area->next) { + if (!size || (sizeof(phys_addr_t) == 4 && pfn >= 0x100000)) + break; + if (!(area->flags & VM_ARM_STATIC_MAPPING)) + continue; + if ((area->flags & VM_ARM_MTYPE_MASK) != VM_ARM_MTYPE(mtype)) + continue; + if (__phys_to_pfn(area->phys_addr) > pfn || + __pfn_to_phys(pfn) + size-1 > area->phys_addr + area->size-1) + continue; + /* we can drop the lock here as we know *area is static */ + read_unlock(&vmlist_lock); + addr = (unsigned long)area->addr; + addr += __pfn_to_phys(pfn) - area->phys_addr; + return (void __iomem *) (offset + addr); + } + read_unlock(&vmlist_lock); + + /* + * Don't allow RAM to be mapped - this causes problems with ARMv6+ + */ + if (WARN_ON(pfn_valid(pfn))) + return NULL; + area = get_vm_area_caller(size, VM_IOREMAP, caller); if (!area) return NULL; addr = (unsigned long)area->addr; -#ifndef CONFIG_SMP +#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE) if (DOMAIN_IO == 0 && (((cpu_architecture() >= CPU_ARCH_ARMv6) && (get_cr() & CR_XP)) || cpu_is_xsc3()) && pfn >= 0x100000 && @@ -313,28 +338,34 @@ __arm_ioremap_exec(unsigned long phys_addr, size_t size, bool cached) void __iounmap(volatile void __iomem *io_addr) { void *addr = (void *)(PAGE_MASK & (unsigned long)io_addr); -#ifndef CONFIG_SMP - struct vm_struct **p, *tmp; + struct vm_struct *vm; - /* - * If this is a section based mapping we need to handle it - * specially as the VM subsystem does not know how to handle - * such a beast. We need the lock here b/c we need to clear - * all the mappings before the area can be reclaimed - * by someone else. - */ - write_lock(&vmlist_lock); - for (p = &vmlist ; (tmp = *p) ; p = &tmp->next) { - if ((tmp->flags & VM_IOREMAP) && (tmp->addr == addr)) { - if (tmp->flags & VM_ARM_SECTION_MAPPING) { - unmap_area_sections((unsigned long)tmp->addr, - tmp->size); - } + read_lock(&vmlist_lock); + for (vm = vmlist; vm; vm = vm->next) { + if (vm->addr > addr) + break; + if (!(vm->flags & VM_IOREMAP)) + continue; + /* If this is a static mapping we must leave it alone */ + if ((vm->flags & VM_ARM_STATIC_MAPPING) && + (vm->addr <= addr) && (vm->addr + vm->size > addr)) { + read_unlock(&vmlist_lock); + return; + } +#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE) + /* + * If this is a section based mapping we need to handle it + * specially as the VM subsystem does not know how to handle + * such a beast. + */ + if ((vm->addr == addr) && + (vm->flags & VM_ARM_SECTION_MAPPING)) { + unmap_area_sections((unsigned long)vm->addr, vm->size); break; } - } - write_unlock(&vmlist_lock); #endif + } + read_unlock(&vmlist_lock); vunmap(addr); } diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h index ad7cce3..70f6d3ea 100644 --- a/arch/arm/mm/mm.h +++ b/arch/arm/mm/mm.h @@ -21,6 +21,20 @@ const struct mem_type *get_mem_type(unsigned int type); extern void __flush_dcache_page(struct address_space *mapping, struct page *page); +/* + * ARM specific vm_struct->flags bits. + */ + +/* (super)section-mapped I/O regions used by ioremap()/iounmap() */ +#define VM_ARM_SECTION_MAPPING 0x80000000 + +/* permanent static mappings from iotable_init() */ +#define VM_ARM_STATIC_MAPPING 0x40000000 + +/* mapping type (attributes) for permanent static mappings */ +#define VM_ARM_MTYPE(mt) ((mt) << 20) +#define VM_ARM_MTYPE_MASK (0x1f << 20) + #endif #ifdef CONFIG_ZONE_DMA diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c index 44b628e..ce8cb19 100644 --- a/arch/arm/mm/mmap.c +++ b/arch/arm/mm/mmap.c @@ -11,10 +11,49 @@ #include <linux/random.h> #include <asm/cachetype.h> +static inline unsigned long COLOUR_ALIGN_DOWN(unsigned long addr, + unsigned long pgoff) +{ + unsigned long base = addr & ~(SHMLBA-1); + unsigned long off = (pgoff << PAGE_SHIFT) & (SHMLBA-1); + + if (base + off <= addr) + return base + off; + + return base - off; +} + #define COLOUR_ALIGN(addr,pgoff) \ ((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \ (((pgoff)<<PAGE_SHIFT) & (SHMLBA-1))) +/* gap between mmap and stack */ +#define MIN_GAP (128*1024*1024UL) +#define MAX_GAP ((TASK_SIZE)/6*5) + +static int mmap_is_legacy(void) +{ + if (current->personality & ADDR_COMPAT_LAYOUT) + return 1; + + if (rlimit(RLIMIT_STACK) == RLIM_INFINITY) + return 1; + + return sysctl_legacy_va_layout; +} + +static unsigned long mmap_base(unsigned long rnd) +{ + unsigned long gap = rlimit(RLIMIT_STACK); + + if (gap < MIN_GAP) + gap = MIN_GAP; + else if (gap > MAX_GAP) + gap = MAX_GAP; + + return PAGE_ALIGN(TASK_SIZE - gap - rnd); +} + /* * We need to ensure that shared mappings are correctly aligned to * avoid aliasing issues with VIPT caches. We need to ensure that @@ -68,13 +107,9 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, if (len > mm->cached_hole_size) { start_addr = addr = mm->free_area_cache; } else { - start_addr = addr = TASK_UNMAPPED_BASE; + start_addr = addr = mm->mmap_base; mm->cached_hole_size = 0; } - /* 8 bits of randomness in 20 address space bits */ - if ((current->flags & PF_RANDOMIZE) && - !(current->personality & ADDR_NO_RANDOMIZE)) - addr += (get_random_int() % (1 << 8)) << PAGE_SHIFT; full_search: if (do_align) @@ -111,6 +146,134 @@ full_search: } } +unsigned long +arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, + const unsigned long len, const unsigned long pgoff, + const unsigned long flags) +{ + struct vm_area_struct *vma; + struct mm_struct *mm = current->mm; + unsigned long addr = addr0; + int do_align = 0; + int aliasing = cache_is_vipt_aliasing(); + + /* + * We only need to do colour alignment if either the I or D + * caches alias. + */ + if (aliasing) + do_align = filp || (flags & MAP_SHARED); + + /* requested length too big for entire address space */ + if (len > TASK_SIZE) + return -ENOMEM; + + if (flags & MAP_FIXED) { + if (aliasing && flags & MAP_SHARED && + (addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)) + return -EINVAL; + return addr; + } + + /* requesting a specific address */ + if (addr) { + if (do_align) + addr = COLOUR_ALIGN(addr, pgoff); + else + addr = PAGE_ALIGN(addr); + vma = find_vma(mm, addr); + if (TASK_SIZE - len >= addr && + (!vma || addr + len <= vma->vm_start)) + return addr; + } + + /* check if free_area_cache is useful for us */ + if (len <= mm->cached_hole_size) { + mm->cached_hole_size = 0; + mm->free_area_cache = mm->mmap_base; + } + + /* either no address requested or can't fit in requested address hole */ + addr = mm->free_area_cache; + if (do_align) { + unsigned long base = COLOUR_ALIGN_DOWN(addr - len, pgoff); + addr = base + len; + } + + /* make sure it can fit in the remaining address space */ + if (addr > len) { + vma = find_vma(mm, addr-len); + if (!vma || addr <= vma->vm_start) + /* remember the address as a hint for next time */ + return (mm->free_area_cache = addr-len); + } + + if (mm->mmap_base < len) + goto bottomup; + + addr = mm->mmap_base - len; + if (do_align) + addr = COLOUR_ALIGN_DOWN(addr, pgoff); + + do { + /* + * Lookup failure means no vma is above this address, + * else if new region fits below vma->vm_start, + * return with success: + */ + vma = find_vma(mm, addr); + if (!vma || addr+len <= vma->vm_start) + /* remember the address as a hint for next time */ + return (mm->free_area_cache = addr); + + /* remember the largest hole we saw so far */ + if (addr + mm->cached_hole_size < vma->vm_start) + mm->cached_hole_size = vma->vm_start - addr; + + /* try just below the current vma->vm_start */ + addr = vma->vm_start - len; + if (do_align) + addr = COLOUR_ALIGN_DOWN(addr, pgoff); + } while (len < vma->vm_start); + +bottomup: + /* + * A failed mmap() very likely causes application failure, + * so fall back to the bottom-up function here. This scenario + * can happen with large stack limits and large mmap() + * allocations. + */ + mm->cached_hole_size = ~0UL; + mm->free_area_cache = TASK_UNMAPPED_BASE; + addr = arch_get_unmapped_area(filp, addr0, len, pgoff, flags); + /* + * Restore the topdown base: + */ + mm->free_area_cache = mm->mmap_base; + mm->cached_hole_size = ~0UL; + + return addr; +} + +void arch_pick_mmap_layout(struct mm_struct *mm) +{ + unsigned long random_factor = 0UL; + + /* 8 bits of randomness in 20 address space bits */ + if ((current->flags & PF_RANDOMIZE) && + !(current->personality & ADDR_NO_RANDOMIZE)) + random_factor = (get_random_int() % (1 << 8)) << PAGE_SHIFT; + + if (mmap_is_legacy()) { + mm->mmap_base = TASK_UNMAPPED_BASE + random_factor; + mm->get_unmapped_area = arch_get_unmapped_area; + mm->unmap_area = arch_unmap_area; + } else { + mm->mmap_base = mmap_base(random_factor); + mm->get_unmapped_area = arch_get_unmapped_area_topdown; + mm->unmap_area = arch_unmap_area_topdown; + } +} /* * You really shouldn't be using read() or write() on /dev/mem. This diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index dc8c550..94c5a0c 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -15,6 +15,7 @@ #include <linux/nodemask.h> #include <linux/memblock.h> #include <linux/fs.h> +#include <linux/vmalloc.h> #include <asm/cputype.h> #include <asm/sections.h> @@ -150,6 +151,7 @@ static int __init early_nowrite(char *__unused) } early_param("nowb", early_nowrite); +#ifndef CONFIG_ARM_LPAE static int __init early_ecc(char *p) { if (memcmp(p, "on", 2) == 0) @@ -159,6 +161,7 @@ static int __init early_ecc(char *p) return 0; } early_param("ecc", early_ecc); +#endif static int __init noalign_setup(char *__unused) { @@ -228,10 +231,12 @@ static struct mem_type mem_types[] = { .prot_sect = PMD_TYPE_SECT | PMD_SECT_XN, .domain = DOMAIN_KERNEL, }, +#ifndef CONFIG_ARM_LPAE [MT_MINICLEAN] = { .prot_sect = PMD_TYPE_SECT | PMD_SECT_XN | PMD_SECT_MINICACHE, .domain = DOMAIN_KERNEL, }, +#endif [MT_LOW_VECTORS] = { .prot_pte = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | L_PTE_RDONLY, @@ -429,6 +434,7 @@ static void __init build_mem_type_table(void) * ARMv6 and above have extended page tables. */ if (cpu_arch >= CPU_ARCH_ARMv6 && (cr & CR_XP)) { +#ifndef CONFIG_ARM_LPAE /* * Mark cache clean areas and XIP ROM read only * from SVC mode and no access from userspace. @@ -436,6 +442,7 @@ static void __init build_mem_type_table(void) mem_types[MT_ROM].prot_sect |= PMD_SECT_APX|PMD_SECT_AP_WRITE; mem_types[MT_MINICLEAN].prot_sect |= PMD_SECT_APX|PMD_SECT_AP_WRITE; mem_types[MT_CACHECLEAN].prot_sect |= PMD_SECT_APX|PMD_SECT_AP_WRITE; +#endif if (is_smp()) { /* @@ -474,6 +481,18 @@ static void __init build_mem_type_table(void) mem_types[MT_MEMORY_NONCACHED].prot_sect |= PMD_SECT_BUFFERABLE; } +#ifdef CONFIG_ARM_LPAE + /* + * Do not generate access flag faults for the kernel mappings. + */ + for (i = 0; i < ARRAY_SIZE(mem_types); i++) { + mem_types[i].prot_pte |= PTE_EXT_AF; + mem_types[i].prot_sect |= PMD_SECT_AF; + } + kern_pgprot |= PTE_EXT_AF; + vecs_pgprot |= PTE_EXT_AF; +#endif + for (i = 0; i < 16; i++) { unsigned long v = pgprot_val(protection_map[i]); protection_map[i] = __pgprot(v | user_pgprot); @@ -529,13 +548,18 @@ EXPORT_SYMBOL(phys_mem_access_prot); #define vectors_base() (vectors_high() ? 0xffff0000 : 0) -static void __init *early_alloc(unsigned long sz) +static void __init *early_alloc_aligned(unsigned long sz, unsigned long align) { - void *ptr = __va(memblock_alloc(sz, sz)); + void *ptr = __va(memblock_alloc(sz, align)); memset(ptr, 0, sz); return ptr; } +static void __init *early_alloc(unsigned long sz) +{ + return early_alloc_aligned(sz, sz); +} + static pte_t * __init early_pte_alloc(pmd_t *pmd, unsigned long addr, unsigned long prot) { if (pmd_none(*pmd)) { @@ -572,8 +596,10 @@ static void __init alloc_init_section(pud_t *pud, unsigned long addr, if (((addr | end | phys) & ~SECTION_MASK) == 0) { pmd_t *p = pmd; +#ifndef CONFIG_ARM_LPAE if (addr & SECTION_SIZE) pmd++; +#endif do { *pmd = __pmd(phys | type->prot_sect); @@ -603,6 +629,7 @@ static void alloc_init_pud(pgd_t *pgd, unsigned long addr, unsigned long end, } while (pud++, addr = next, addr != end); } +#ifndef CONFIG_ARM_LPAE static void __init create_36bit_mapping(struct map_desc *md, const struct mem_type *type) { @@ -662,6 +689,7 @@ static void __init create_36bit_mapping(struct map_desc *md, pgd += SUPERSECTION_SIZE >> PGDIR_SHIFT; } while (addr != end); } +#endif /* !CONFIG_ARM_LPAE */ /* * Create the page directory entries and any necessary @@ -685,14 +713,16 @@ static void __init create_mapping(struct map_desc *md) } if ((md->type == MT_DEVICE || md->type == MT_ROM) && - md->virtual >= PAGE_OFFSET && md->virtual < VMALLOC_END) { + md->virtual >= PAGE_OFFSET && + (md->virtual < VMALLOC_START || md->virtual >= VMALLOC_END)) { printk(KERN_WARNING "BUG: mapping for 0x%08llx" - " at 0x%08lx overlaps vmalloc space\n", + " at 0x%08lx out of vmalloc space\n", (long long)__pfn_to_phys((u64)md->pfn), md->virtual); } type = &mem_types[md->type]; +#ifndef CONFIG_ARM_LPAE /* * Catch 36-bit addresses */ @@ -700,6 +730,7 @@ static void __init create_mapping(struct map_desc *md) create_36bit_mapping(md, type); return; } +#endif addr = md->virtual & PAGE_MASK; phys = __pfn_to_phys(md->pfn); @@ -729,18 +760,33 @@ static void __init create_mapping(struct map_desc *md) */ void __init iotable_init(struct map_desc *io_desc, int nr) { - int i; + struct map_desc *md; + struct vm_struct *vm; + + if (!nr) + return; - for (i = 0; i < nr; i++) - create_mapping(io_desc + i); + vm = early_alloc_aligned(sizeof(*vm) * nr, __alignof__(*vm)); + + for (md = io_desc; nr; md++, nr--) { + create_mapping(md); + vm->addr = (void *)(md->virtual & PAGE_MASK); + vm->size = PAGE_ALIGN(md->length + (md->virtual & ~PAGE_MASK)); + vm->phys_addr = __pfn_to_phys(md->pfn); + vm->flags = VM_IOREMAP | VM_ARM_STATIC_MAPPING; + vm->flags |= VM_ARM_MTYPE(md->type); + vm->caller = iotable_init; + vm_area_add_early(vm++); + } } -static void * __initdata vmalloc_min = (void *)(VMALLOC_END - SZ_128M); +static void * __initdata vmalloc_min = + (void *)(VMALLOC_END - (240 << 20) - VMALLOC_OFFSET); /* * vmalloc=size forces the vmalloc area to be exactly 'size' * bytes. This can be used to increase (or decrease) the vmalloc - * area - the default is 128m. + * area - the default is 240m. */ static int __init early_vmalloc(char *arg) { @@ -775,6 +821,9 @@ void __init sanity_check_meminfo(void) struct membank *bank = &meminfo.bank[j]; *bank = meminfo.bank[i]; + if (bank->start > ULONG_MAX) + highmem = 1; + #ifdef CONFIG_HIGHMEM if (__va(bank->start) >= vmalloc_min || __va(bank->start) < (void *)PAGE_OFFSET) @@ -786,7 +835,7 @@ void __init sanity_check_meminfo(void) * Split those memory banks which are partially overlapping * the vmalloc area greatly simplifying things later. */ - if (__va(bank->start) < vmalloc_min && + if (!highmem && __va(bank->start) < vmalloc_min && bank->size > vmalloc_min - __va(bank->start)) { if (meminfo.nr_banks >= NR_BANKS) { printk(KERN_CRIT "NR_BANKS too low, " @@ -807,6 +856,17 @@ void __init sanity_check_meminfo(void) bank->highmem = highmem; /* + * Highmem banks not allowed with !CONFIG_HIGHMEM. + */ + if (highmem) { + printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx " + "(!CONFIG_HIGHMEM).\n", + (unsigned long long)bank->start, + (unsigned long long)bank->start + bank->size - 1); + continue; + } + + /* * Check whether this memory bank would entirely overlap * the vmalloc area. */ @@ -860,6 +920,7 @@ void __init sanity_check_meminfo(void) } #endif meminfo.nr_banks = j; + high_memory = __va(lowmem_limit - 1) + 1; memblock_set_current_limit(lowmem_limit); } @@ -890,14 +951,20 @@ static inline void prepare_page_table(void) /* * Clear out all the kernel space mappings, except for the first - * memory bank, up to the end of the vmalloc region. + * memory bank, up to the vmalloc region. */ for (addr = __phys_to_virt(end); - addr < VMALLOC_END; addr += PMD_SIZE) + addr < VMALLOC_START; addr += PMD_SIZE) pmd_clear(pmd_off_k(addr)); } +#ifdef CONFIG_ARM_LPAE +/* the first page is reserved for pgd */ +#define SWAPPER_PG_DIR_SIZE (PAGE_SIZE + \ + PTRS_PER_PGD * PTRS_PER_PMD * sizeof(pmd_t)) +#else #define SWAPPER_PG_DIR_SIZE (PTRS_PER_PGD * sizeof(pgd_t)) +#endif /* * Reserve the special regions of memory @@ -920,8 +987,8 @@ void __init arm_mm_memblock_reserve(void) } /* - * Set up device the mappings. Since we clear out the page tables for all - * mappings above VMALLOC_END, we will remove any debug device mappings. + * Set up the device mappings. Since we clear out the page tables for all + * mappings above VMALLOC_START, we will remove any debug device mappings. * This means you have to be careful how you debug this function, or any * called function. This means you can't use any function or debugging * method which may touch any device, otherwise the kernel _will_ crash. @@ -936,7 +1003,7 @@ static void __init devicemaps_init(struct machine_desc *mdesc) */ vectors_page = early_alloc(PAGE_SIZE); - for (addr = VMALLOC_END; addr; addr += PMD_SIZE) + for (addr = VMALLOC_START; addr; addr += PMD_SIZE) pmd_clear(pmd_off_k(addr)); /* diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c index 941a98c..4fc6794 100644 --- a/arch/arm/mm/nommu.c +++ b/arch/arm/mm/nommu.c @@ -29,6 +29,8 @@ void __init arm_mm_memblock_reserve(void) void __init sanity_check_meminfo(void) { + phys_addr_t end = bank_phys_end(&meminfo.bank[meminfo.nr_banks - 1]); + high_memory = __va(end - 1) + 1; } /* @@ -43,7 +45,7 @@ void __init paging_init(struct machine_desc *mdesc) /* * We don't need to do anything here for nommu machines. */ -void setup_mm_for_reboot(char mode) +void setup_mm_for_reboot(void) { } diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c index b2027c1..a3e78cc 100644 --- a/arch/arm/mm/pgd.c +++ b/arch/arm/mm/pgd.c @@ -10,6 +10,7 @@ #include <linux/mm.h> #include <linux/gfp.h> #include <linux/highmem.h> +#include <linux/slab.h> #include <asm/pgalloc.h> #include <asm/page.h> @@ -17,6 +18,14 @@ #include "mm.h" +#ifdef CONFIG_ARM_LPAE +#define __pgd_alloc() kmalloc(PTRS_PER_PGD * sizeof(pgd_t), GFP_KERNEL) +#define __pgd_free(pgd) kfree(pgd) +#else +#define __pgd_alloc() (pgd_t *)__get_free_pages(GFP_KERNEL, 2) +#define __pgd_free(pgd) free_pages((unsigned long)pgd, 2) +#endif + /* * need to get a 16k page for level 1 */ @@ -27,7 +36,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm) pmd_t *new_pmd, *init_pmd; pte_t *new_pte, *init_pte; - new_pgd = (pgd_t *)__get_free_pages(GFP_KERNEL, 2); + new_pgd = __pgd_alloc(); if (!new_pgd) goto no_pgd; @@ -42,10 +51,25 @@ pgd_t *pgd_alloc(struct mm_struct *mm) clean_dcache_area(new_pgd, PTRS_PER_PGD * sizeof(pgd_t)); +#ifdef CONFIG_ARM_LPAE + /* + * Allocate PMD table for modules and pkmap mappings. + */ + new_pud = pud_alloc(mm, new_pgd + pgd_index(MODULES_VADDR), + MODULES_VADDR); + if (!new_pud) + goto no_pud; + + new_pmd = pmd_alloc(mm, new_pud, 0); + if (!new_pmd) + goto no_pmd; +#endif + if (!vectors_high()) { /* * On ARM, first page must always be allocated since it - * contains the machine vectors. + * contains the machine vectors. The vectors are always high + * with LPAE. */ new_pud = pud_alloc(mm, new_pgd, 0); if (!new_pud) @@ -74,7 +98,7 @@ no_pte: no_pmd: pud_free(mm, new_pud); no_pud: - free_pages((unsigned long)new_pgd, 2); + __pgd_free(new_pgd); no_pgd: return NULL; } @@ -111,5 +135,24 @@ no_pud: pgd_clear(pgd); pud_free(mm, pud); no_pgd: - free_pages((unsigned long) pgd_base, 2); +#ifdef CONFIG_ARM_LPAE + /* + * Free modules/pkmap or identity pmd tables. + */ + for (pgd = pgd_base; pgd < pgd_base + PTRS_PER_PGD; pgd++) { + if (pgd_none_or_clear_bad(pgd)) + continue; + if (pgd_val(*pgd) & L_PGD_SWAPPER) + continue; + pud = pud_offset(pgd, 0); + if (pud_none_or_clear_bad(pud)) + continue; + pmd = pmd_offset(pud, 0); + pud_clear(pud); + pmd_free(mm, pmd); + pgd_clear(pgd); + pud_free(mm, pud); + } +#endif + __pgd_free(pgd_base); } diff --git a/arch/arm/mm/proc-arm1020.S b/arch/arm/mm/proc-arm1020.S index 6746966..2349513 100644 --- a/arch/arm/mm/proc-arm1020.S +++ b/arch/arm/mm/proc-arm1020.S @@ -95,6 +95,7 @@ ENTRY(cpu_arm1020_proc_fin) * loc: location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_arm1020_reset) mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches @@ -107,6 +108,8 @@ ENTRY(cpu_arm1020_reset) bic ip, ip, #0x1100 @ ...i...s........ mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_arm1020_reset) + .popsection /* * cpu_arm1020_do_idle() diff --git a/arch/arm/mm/proc-arm1020e.S b/arch/arm/mm/proc-arm1020e.S index 4251421..c244b06 100644 --- a/arch/arm/mm/proc-arm1020e.S +++ b/arch/arm/mm/proc-arm1020e.S @@ -95,6 +95,7 @@ ENTRY(cpu_arm1020e_proc_fin) * loc: location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_arm1020e_reset) mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches @@ -107,6 +108,8 @@ ENTRY(cpu_arm1020e_reset) bic ip, ip, #0x1100 @ ...i...s........ mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_arm1020e_reset) + .popsection /* * cpu_arm1020e_do_idle() diff --git a/arch/arm/mm/proc-arm1022.S b/arch/arm/mm/proc-arm1022.S index d283cf3..38fe22e 100644 --- a/arch/arm/mm/proc-arm1022.S +++ b/arch/arm/mm/proc-arm1022.S @@ -84,6 +84,7 @@ ENTRY(cpu_arm1022_proc_fin) * loc: location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_arm1022_reset) mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches @@ -96,6 +97,8 @@ ENTRY(cpu_arm1022_reset) bic ip, ip, #0x1100 @ ...i...s........ mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_arm1022_reset) + .popsection /* * cpu_arm1022_do_idle() diff --git a/arch/arm/mm/proc-arm1026.S b/arch/arm/mm/proc-arm1026.S index 678a1ce..3eb9c3c 100644 --- a/arch/arm/mm/proc-arm1026.S +++ b/arch/arm/mm/proc-arm1026.S @@ -84,6 +84,7 @@ ENTRY(cpu_arm1026_proc_fin) * loc: location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_arm1026_reset) mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches @@ -96,6 +97,8 @@ ENTRY(cpu_arm1026_reset) bic ip, ip, #0x1100 @ ...i...s........ mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_arm1026_reset) + .popsection /* * cpu_arm1026_do_idle() diff --git a/arch/arm/mm/proc-arm6_7.S b/arch/arm/mm/proc-arm6_7.S index e5b974c..4fbeb5b 100644 --- a/arch/arm/mm/proc-arm6_7.S +++ b/arch/arm/mm/proc-arm6_7.S @@ -225,6 +225,7 @@ ENTRY(cpu_arm7_set_pte_ext) * Params : r0 = address to jump to * Notes : This sets up everything for a reset */ + .pushsection .idmap.text, "ax" ENTRY(cpu_arm6_reset) ENTRY(cpu_arm7_reset) mov r1, #0 @@ -235,6 +236,9 @@ ENTRY(cpu_arm7_reset) mov r1, #0x30 mcr p15, 0, r1, c1, c0, 0 @ turn off MMU etc mov pc, r0 +ENDPROC(cpu_arm6_reset) +ENDPROC(cpu_arm7_reset) + .popsection __CPUINIT diff --git a/arch/arm/mm/proc-arm720.S b/arch/arm/mm/proc-arm720.S index 55f4e29..0ac908c 100644 --- a/arch/arm/mm/proc-arm720.S +++ b/arch/arm/mm/proc-arm720.S @@ -101,6 +101,7 @@ ENTRY(cpu_arm720_set_pte_ext) * Params : r0 = address to jump to * Notes : This sets up everything for a reset */ + .pushsection .idmap.text, "ax" ENTRY(cpu_arm720_reset) mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate cache @@ -112,6 +113,8 @@ ENTRY(cpu_arm720_reset) bic ip, ip, #0x2100 @ ..v....s........ mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_arm720_reset) + .popsection __CPUINIT diff --git a/arch/arm/mm/proc-arm740.S b/arch/arm/mm/proc-arm740.S index 4506be3..dc5de5d 100644 --- a/arch/arm/mm/proc-arm740.S +++ b/arch/arm/mm/proc-arm740.S @@ -49,6 +49,7 @@ ENTRY(cpu_arm740_proc_fin) * Params : r0 = address to jump to * Notes : This sets up everything for a reset */ + .pushsection .idmap.text, "ax" ENTRY(cpu_arm740_reset) mov ip, #0 mcr p15, 0, ip, c7, c0, 0 @ invalidate cache @@ -56,6 +57,8 @@ ENTRY(cpu_arm740_reset) bic ip, ip, #0x0000000c @ ............wc.. mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_arm740_reset) + .popsection __CPUINIT diff --git a/arch/arm/mm/proc-arm7tdmi.S b/arch/arm/mm/proc-arm7tdmi.S index 7e0e1fe..6ddea3e 100644 --- a/arch/arm/mm/proc-arm7tdmi.S +++ b/arch/arm/mm/proc-arm7tdmi.S @@ -45,8 +45,11 @@ ENTRY(cpu_arm7tdmi_proc_fin) * Params : loc(r0) address to jump to * Purpose : Sets up everything for a reset and jump to the location for soft reset. */ + .pushsection .idmap.text, "ax" ENTRY(cpu_arm7tdmi_reset) mov pc, r0 +ENDPROC(cpu_arm7tdmi_reset) + .popsection __CPUINIT diff --git a/arch/arm/mm/proc-arm920.S b/arch/arm/mm/proc-arm920.S index 88fb3d9..cb941ae 100644 --- a/arch/arm/mm/proc-arm920.S +++ b/arch/arm/mm/proc-arm920.S @@ -85,6 +85,7 @@ ENTRY(cpu_arm920_proc_fin) * loc: location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_arm920_reset) mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches @@ -97,6 +98,8 @@ ENTRY(cpu_arm920_reset) bic ip, ip, #0x1100 @ ...i...s........ mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_arm920_reset) + .popsection /* * cpu_arm920_do_idle() diff --git a/arch/arm/mm/proc-arm922.S b/arch/arm/mm/proc-arm922.S index 490e188..4ec0e07 100644 --- a/arch/arm/mm/proc-arm922.S +++ b/arch/arm/mm/proc-arm922.S @@ -87,6 +87,7 @@ ENTRY(cpu_arm922_proc_fin) * loc: location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_arm922_reset) mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches @@ -99,6 +100,8 @@ ENTRY(cpu_arm922_reset) bic ip, ip, #0x1100 @ ...i...s........ mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_arm922_reset) + .popsection /* * cpu_arm922_do_idle() diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S index 51d494b..9dccd9a 100644 --- a/arch/arm/mm/proc-arm925.S +++ b/arch/arm/mm/proc-arm925.S @@ -108,6 +108,7 @@ ENTRY(cpu_arm925_proc_fin) * loc: location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_arm925_reset) /* Send software reset to MPU and DSP */ mov ip, #0xff000000 @@ -115,6 +116,8 @@ ENTRY(cpu_arm925_reset) orr ip, ip, #0x0000ce00 mov r4, #1 strh r4, [ip, #0x10] +ENDPROC(cpu_arm925_reset) + .popsection mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches diff --git a/arch/arm/mm/proc-arm926.S b/arch/arm/mm/proc-arm926.S index 9f8fd91..820259b 100644 --- a/arch/arm/mm/proc-arm926.S +++ b/arch/arm/mm/proc-arm926.S @@ -77,6 +77,7 @@ ENTRY(cpu_arm926_proc_fin) * loc: location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_arm926_reset) mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches @@ -89,6 +90,8 @@ ENTRY(cpu_arm926_reset) bic ip, ip, #0x1100 @ ...i...s........ mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_arm926_reset) + .popsection /* * cpu_arm926_do_idle() diff --git a/arch/arm/mm/proc-arm940.S b/arch/arm/mm/proc-arm940.S index ac750d5..9fdc0a17 100644 --- a/arch/arm/mm/proc-arm940.S +++ b/arch/arm/mm/proc-arm940.S @@ -48,6 +48,7 @@ ENTRY(cpu_arm940_proc_fin) * Params : r0 = address to jump to * Notes : This sets up everything for a reset */ + .pushsection .idmap.text, "ax" ENTRY(cpu_arm940_reset) mov ip, #0 mcr p15, 0, ip, c7, c5, 0 @ flush I cache @@ -58,6 +59,8 @@ ENTRY(cpu_arm940_reset) bic ip, ip, #0x00001000 @ i-cache mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_arm940_reset) + .popsection /* * cpu_arm940_do_idle() diff --git a/arch/arm/mm/proc-arm946.S b/arch/arm/mm/proc-arm946.S index 683af3a..f684cfe 100644 --- a/arch/arm/mm/proc-arm946.S +++ b/arch/arm/mm/proc-arm946.S @@ -55,6 +55,7 @@ ENTRY(cpu_arm946_proc_fin) * Params : r0 = address to jump to * Notes : This sets up everything for a reset */ + .pushsection .idmap.text, "ax" ENTRY(cpu_arm946_reset) mov ip, #0 mcr p15, 0, ip, c7, c5, 0 @ flush I cache @@ -65,6 +66,8 @@ ENTRY(cpu_arm946_reset) bic ip, ip, #0x00001000 @ i-cache mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_arm946_reset) + .popsection /* * cpu_arm946_do_idle() diff --git a/arch/arm/mm/proc-arm9tdmi.S b/arch/arm/mm/proc-arm9tdmi.S index 2120f9e..8881391 100644 --- a/arch/arm/mm/proc-arm9tdmi.S +++ b/arch/arm/mm/proc-arm9tdmi.S @@ -45,8 +45,11 @@ ENTRY(cpu_arm9tdmi_proc_fin) * Params : loc(r0) address to jump to * Purpose : Sets up everything for a reset and jump to the location for soft reset. */ + .pushsection .idmap.text, "ax" ENTRY(cpu_arm9tdmi_reset) mov pc, r0 +ENDPROC(cpu_arm9tdmi_reset) + .popsection __CPUINIT diff --git a/arch/arm/mm/proc-fa526.S b/arch/arm/mm/proc-fa526.S index 4c7a571..272558a 100644 --- a/arch/arm/mm/proc-fa526.S +++ b/arch/arm/mm/proc-fa526.S @@ -57,6 +57,7 @@ ENTRY(cpu_fa526_proc_fin) * loc: location to jump to for soft reset */ .align 4 + .pushsection .idmap.text, "ax" ENTRY(cpu_fa526_reset) /* TODO: Use CP8 if possible... */ mov ip, #0 @@ -73,6 +74,8 @@ ENTRY(cpu_fa526_reset) nop nop mov pc, r0 +ENDPROC(cpu_fa526_reset) + .popsection /* * cpu_fa526_do_idle() diff --git a/arch/arm/mm/proc-feroceon.S b/arch/arm/mm/proc-feroceon.S index 8a6c2f7..ba3c500 100644 --- a/arch/arm/mm/proc-feroceon.S +++ b/arch/arm/mm/proc-feroceon.S @@ -98,6 +98,7 @@ ENTRY(cpu_feroceon_proc_fin) * loc: location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_feroceon_reset) mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches @@ -110,6 +111,8 @@ ENTRY(cpu_feroceon_reset) bic ip, ip, #0x1100 @ ...i...s........ mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_feroceon_reset) + .popsection /* * cpu_feroceon_do_idle() diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S index 307a4def..2d8ff3a 100644 --- a/arch/arm/mm/proc-macros.S +++ b/arch/arm/mm/proc-macros.S @@ -91,8 +91,9 @@ #if L_PTE_SHARED != PTE_EXT_SHARED #error PTE shared bit mismatch #endif -#if (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\ - L_PTE_FILE+L_PTE_PRESENT) > L_PTE_SHARED +#if !defined (CONFIG_ARM_LPAE) && \ + (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\ + L_PTE_FILE+L_PTE_PRESENT) > L_PTE_SHARED #error Invalid Linux PTE bit settings #endif #endif /* CONFIG_MMU */ diff --git a/arch/arm/mm/proc-mohawk.S b/arch/arm/mm/proc-mohawk.S index db52b0f..cdfedc5 100644 --- a/arch/arm/mm/proc-mohawk.S +++ b/arch/arm/mm/proc-mohawk.S @@ -69,6 +69,7 @@ ENTRY(cpu_mohawk_proc_fin) * (same as arm926) */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_mohawk_reset) mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches @@ -79,6 +80,8 @@ ENTRY(cpu_mohawk_reset) bic ip, ip, #0x1100 @ ...i...s........ mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_mohawk_reset) + .popsection /* * cpu_mohawk_do_idle() diff --git a/arch/arm/mm/proc-sa110.S b/arch/arm/mm/proc-sa110.S index d50ada2..775d70f 100644 --- a/arch/arm/mm/proc-sa110.S +++ b/arch/arm/mm/proc-sa110.S @@ -62,6 +62,7 @@ ENTRY(cpu_sa110_proc_fin) * loc: location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_sa110_reset) mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches @@ -74,6 +75,8 @@ ENTRY(cpu_sa110_reset) bic ip, ip, #0x1100 @ ...i...s........ mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_sa110_reset) + .popsection /* * cpu_sa110_do_idle(type) diff --git a/arch/arm/mm/proc-sa1100.S b/arch/arm/mm/proc-sa1100.S index 7d91545..3aa0da1 100644 --- a/arch/arm/mm/proc-sa1100.S +++ b/arch/arm/mm/proc-sa1100.S @@ -70,6 +70,7 @@ ENTRY(cpu_sa1100_proc_fin) * loc: location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_sa1100_reset) mov ip, #0 mcr p15, 0, ip, c7, c7, 0 @ invalidate I,D caches @@ -82,6 +83,8 @@ ENTRY(cpu_sa1100_reset) bic ip, ip, #0x1100 @ ...i...s........ mcr p15, 0, ip, c1, c0, 0 @ ctrl register mov pc, r0 +ENDPROC(cpu_sa1100_reset) + .popsection /* * cpu_sa1100_do_idle(type) diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S index d061d2f..5900cd5 100644 --- a/arch/arm/mm/proc-v6.S +++ b/arch/arm/mm/proc-v6.S @@ -55,6 +55,7 @@ ENTRY(cpu_v6_proc_fin) * - loc - location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_v6_reset) mrc p15, 0, r1, c1, c0, 0 @ ctrl register bic r1, r1, #0x1 @ ...............m @@ -62,6 +63,8 @@ ENTRY(cpu_v6_reset) mov r1, #0 mcr p15, 0, r1, c7, c5, 4 @ ISB mov pc, r0 +ENDPROC(cpu_v6_reset) + .popsection /* * cpu_v6_do_idle() diff --git a/arch/arm/mm/proc-v7-2level.S b/arch/arm/mm/proc-v7-2level.S new file mode 100644 index 0000000..3a4b3e7 --- /dev/null +++ b/arch/arm/mm/proc-v7-2level.S @@ -0,0 +1,171 @@ +/* + * arch/arm/mm/proc-v7-2level.S + * + * Copyright (C) 2001 Deep Blue Solutions Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#define TTB_S (1 << 1) +#define TTB_RGN_NC (0 << 3) +#define TTB_RGN_OC_WBWA (1 << 3) +#define TTB_RGN_OC_WT (2 << 3) +#define TTB_RGN_OC_WB (3 << 3) +#define TTB_NOS (1 << 5) +#define TTB_IRGN_NC ((0 << 0) | (0 << 6)) +#define TTB_IRGN_WBWA ((0 << 0) | (1 << 6)) +#define TTB_IRGN_WT ((1 << 0) | (0 << 6)) +#define TTB_IRGN_WB ((1 << 0) | (1 << 6)) + +/* PTWs cacheable, inner WB not shareable, outer WB not shareable */ +#define TTB_FLAGS_UP TTB_IRGN_WB|TTB_RGN_OC_WB +#define PMD_FLAGS_UP PMD_SECT_WB + +/* PTWs cacheable, inner WBWA shareable, outer WBWA not shareable */ +#define TTB_FLAGS_SMP TTB_IRGN_WBWA|TTB_S|TTB_NOS|TTB_RGN_OC_WBWA +#define PMD_FLAGS_SMP PMD_SECT_WBWA|PMD_SECT_S + +/* + * cpu_v7_switch_mm(pgd_phys, tsk) + * + * Set the translation table base pointer to be pgd_phys + * + * - pgd_phys - physical address of new TTB + * + * It is assumed that: + * - we are not using split page tables + */ +ENTRY(cpu_v7_switch_mm) +#ifdef CONFIG_MMU + mov r2, #0 + ldr r1, [r1, #MM_CONTEXT_ID] @ get mm->context.id + ALT_SMP(orr r0, r0, #TTB_FLAGS_SMP) + ALT_UP(orr r0, r0, #TTB_FLAGS_UP) +#ifdef CONFIG_ARM_ERRATA_430973 + mcr p15, 0, r2, c7, c5, 6 @ flush BTAC/BTB +#endif +#ifdef CONFIG_ARM_ERRATA_754322 + dsb +#endif + mcr p15, 0, r2, c13, c0, 1 @ set reserved context ID + isb +1: mcr p15, 0, r0, c2, c0, 0 @ set TTB 0 + isb +#ifdef CONFIG_ARM_ERRATA_754322 + dsb +#endif + mcr p15, 0, r1, c13, c0, 1 @ set context ID + isb +#endif + mov pc, lr +ENDPROC(cpu_v7_switch_mm) + +/* + * cpu_v7_set_pte_ext(ptep, pte) + * + * Set a level 2 translation table entry. + * + * - ptep - pointer to level 2 translation table entry + * (hardware version is stored at +2048 bytes) + * - pte - PTE value to store + * - ext - value for extended PTE bits + */ +ENTRY(cpu_v7_set_pte_ext) +#ifdef CONFIG_MMU + str r1, [r0] @ linux version + + bic r3, r1, #0x000003f0 + bic r3, r3, #PTE_TYPE_MASK + orr r3, r3, r2 + orr r3, r3, #PTE_EXT_AP0 | 2 + + tst r1, #1 << 4 + orrne r3, r3, #PTE_EXT_TEX(1) + + eor r1, r1, #L_PTE_DIRTY + tst r1, #L_PTE_RDONLY | L_PTE_DIRTY + orrne r3, r3, #PTE_EXT_APX + + tst r1, #L_PTE_USER + orrne r3, r3, #PTE_EXT_AP1 +#ifdef CONFIG_CPU_USE_DOMAINS + @ allow kernel read/write access to read-only user pages + tstne r3, #PTE_EXT_APX + bicne r3, r3, #PTE_EXT_APX | PTE_EXT_AP0 +#endif + + tst r1, #L_PTE_XN + orrne r3, r3, #PTE_EXT_XN + + tst r1, #L_PTE_YOUNG + tstne r1, #L_PTE_PRESENT + moveq r3, #0 + + ARM( str r3, [r0, #2048]! ) + THUMB( add r0, r0, #2048 ) + THUMB( str r3, [r0] ) + mcr p15, 0, r0, c7, c10, 1 @ flush_pte +#endif + mov pc, lr +ENDPROC(cpu_v7_set_pte_ext) + + /* + * Memory region attributes with SCTLR.TRE=1 + * + * n = TEX[0],C,B + * TR = PRRR[2n+1:2n] - memory type + * IR = NMRR[2n+1:2n] - inner cacheable property + * OR = NMRR[2n+17:2n+16] - outer cacheable property + * + * n TR IR OR + * UNCACHED 000 00 + * BUFFERABLE 001 10 00 00 + * WRITETHROUGH 010 10 10 10 + * WRITEBACK 011 10 11 11 + * reserved 110 + * WRITEALLOC 111 10 01 01 + * DEV_SHARED 100 01 + * DEV_NONSHARED 100 01 + * DEV_WC 001 10 + * DEV_CACHED 011 10 + * + * Other attributes: + * + * DS0 = PRRR[16] = 0 - device shareable property + * DS1 = PRRR[17] = 1 - device shareable property + * NS0 = PRRR[18] = 0 - normal shareable property + * NS1 = PRRR[19] = 1 - normal shareable property + * NOS = PRRR[24+n] = 1 - not outer shareable + */ +.equ PRRR, 0xff0a81a8 +.equ NMRR, 0x40e040e0 + + /* + * Macro for setting up the TTBRx and TTBCR registers. + * - \ttb0 and \ttb1 updated with the corresponding flags. + */ + .macro v7_ttb_setup, zero, ttbr0, ttbr1, tmp + mcr p15, 0, \zero, c2, c0, 2 @ TTB control register + ALT_SMP(orr \ttbr0, \ttbr0, #TTB_FLAGS_SMP) + ALT_UP(orr \ttbr0, \ttbr0, #TTB_FLAGS_UP) + ALT_SMP(orr \ttbr1, \ttbr1, #TTB_FLAGS_SMP) + ALT_UP(orr \ttbr1, \ttbr1, #TTB_FLAGS_UP) + mcr p15, 0, \ttbr1, c2, c0, 1 @ load TTB1 + .endm + + __CPUINIT + + /* AT + * TFR EV X F I D LR S + * .EEE ..EE PUI. .T.T 4RVI ZWRS BLDP WCAM + * rxxx rrxx xxx0 0101 xxxx xxxx x111 xxxx < forced + * 1 0 110 0011 1100 .111 1101 < we want + */ + .align 2 + .type v7_crval, #object +v7_crval: + crval clear=0x0120c302, mmuset=0x10c03c7d, ucset=0x00c01c7c + + .previous diff --git a/arch/arm/mm/proc-v7-3level.S b/arch/arm/mm/proc-v7-3level.S new file mode 100644 index 0000000..8de0f1d --- /dev/null +++ b/arch/arm/mm/proc-v7-3level.S @@ -0,0 +1,150 @@ +/* + * arch/arm/mm/proc-v7-3level.S + * + * Copyright (C) 2001 Deep Blue Solutions Ltd. + * Copyright (C) 2011 ARM Ltd. + * Author: Catalin Marinas <catalin.marinas@arm.com> + * based on arch/arm/mm/proc-v7-2level.S + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#define TTB_IRGN_NC (0 << 8) +#define TTB_IRGN_WBWA (1 << 8) +#define TTB_IRGN_WT (2 << 8) +#define TTB_IRGN_WB (3 << 8) +#define TTB_RGN_NC (0 << 10) +#define TTB_RGN_OC_WBWA (1 << 10) +#define TTB_RGN_OC_WT (2 << 10) +#define TTB_RGN_OC_WB (3 << 10) +#define TTB_S (3 << 12) +#define TTB_EAE (1 << 31) + +/* PTWs cacheable, inner WB not shareable, outer WB not shareable */ +#define TTB_FLAGS_UP (TTB_IRGN_WB|TTB_RGN_OC_WB) +#define PMD_FLAGS_UP (PMD_SECT_WB) + +/* PTWs cacheable, inner WBWA shareable, outer WBWA not shareable */ +#define TTB_FLAGS_SMP (TTB_IRGN_WBWA|TTB_S|TTB_RGN_OC_WBWA) +#define PMD_FLAGS_SMP (PMD_SECT_WBWA|PMD_SECT_S) + +/* + * cpu_v7_switch_mm(pgd_phys, tsk) + * + * Set the translation table base pointer to be pgd_phys (physical address of + * the new TTB). + */ +ENTRY(cpu_v7_switch_mm) +#ifdef CONFIG_MMU + ldr r1, [r1, #MM_CONTEXT_ID] @ get mm->context.id + and r3, r1, #0xff + mov r3, r3, lsl #(48 - 32) @ ASID + mcrr p15, 0, r0, r3, c2 @ set TTB 0 + isb +#endif + mov pc, lr +ENDPROC(cpu_v7_switch_mm) + +/* + * cpu_v7_set_pte_ext(ptep, pte) + * + * Set a level 2 translation table entry. + * - ptep - pointer to level 3 translation table entry + * - pte - PTE value to store (64-bit in r2 and r3) + */ +ENTRY(cpu_v7_set_pte_ext) +#ifdef CONFIG_MMU + tst r2, #L_PTE_PRESENT + beq 1f + tst r3, #1 << (55 - 32) @ L_PTE_DIRTY + orreq r2, #L_PTE_RDONLY +1: strd r2, r3, [r0] + mcr p15, 0, r0, c7, c10, 1 @ flush_pte +#endif + mov pc, lr +ENDPROC(cpu_v7_set_pte_ext) + + /* + * Memory region attributes for LPAE (defined in pgtable-3level.h): + * + * n = AttrIndx[2:0] + * + * n MAIR + * UNCACHED 000 00000000 + * BUFFERABLE 001 01000100 + * DEV_WC 001 01000100 + * WRITETHROUGH 010 10101010 + * WRITEBACK 011 11101110 + * DEV_CACHED 011 11101110 + * DEV_SHARED 100 00000100 + * DEV_NONSHARED 100 00000100 + * unused 101 + * unused 110 + * WRITEALLOC 111 11111111 + */ +.equ PRRR, 0xeeaa4400 @ MAIR0 +.equ NMRR, 0xff000004 @ MAIR1 + + /* + * Macro for setting up the TTBRx and TTBCR registers. + * - \ttbr1 updated. + */ + .macro v7_ttb_setup, zero, ttbr0, ttbr1, tmp + ldr \tmp, =swapper_pg_dir @ swapper_pg_dir virtual address + cmp \ttbr1, \tmp @ PHYS_OFFSET > PAGE_OFFSET? (branch below) + mrc p15, 0, \tmp, c2, c0, 2 @ TTB control register + orr \tmp, \tmp, #TTB_EAE + ALT_SMP(orr \tmp, \tmp, #TTB_FLAGS_SMP) + ALT_UP(orr \tmp, \tmp, #TTB_FLAGS_UP) + ALT_SMP(orr \tmp, \tmp, #TTB_FLAGS_SMP << 16) + ALT_UP(orr \tmp, \tmp, #TTB_FLAGS_UP << 16) + /* + * TTBR0/TTBR1 split (PAGE_OFFSET): + * 0x40000000: T0SZ = 2, T1SZ = 0 (not used) + * 0x80000000: T0SZ = 0, T1SZ = 1 + * 0xc0000000: T0SZ = 0, T1SZ = 2 + * + * Only use this feature if PHYS_OFFSET <= PAGE_OFFSET, otherwise + * booting secondary CPUs would end up using TTBR1 for the identity + * mapping set up in TTBR0. + */ + bhi 9001f @ PHYS_OFFSET > PAGE_OFFSET? + orr \tmp, \tmp, #(((PAGE_OFFSET >> 30) - 1) << 16) @ TTBCR.T1SZ +#if defined CONFIG_VMSPLIT_2G + /* PAGE_OFFSET == 0x80000000, T1SZ == 1 */ + add \ttbr1, \ttbr1, #1 << 4 @ skip two L1 entries +#elif defined CONFIG_VMSPLIT_3G + /* PAGE_OFFSET == 0xc0000000, T1SZ == 2 */ + add \ttbr1, \ttbr1, #4096 * (1 + 3) @ only L2 used, skip pgd+3*pmd +#endif + /* CONFIG_VMSPLIT_1G does not need TTBR1 adjustment */ +9001: mcr p15, 0, \tmp, c2, c0, 2 @ TTB control register + mcrr p15, 1, \ttbr1, \zero, c2 @ load TTBR1 + .endm + + __CPUINIT + + /* + * AT + * TFR EV X F IHD LR S + * .EEE ..EE PUI. .TAT 4RVI ZWRS BLDP WCAM + * rxxx rrxx xxx0 0101 xxxx xxxx x111 xxxx < forced + * 11 0 110 1 0011 1100 .111 1101 < we want + */ + .align 2 + .type v7_crval, #object +v7_crval: + crval clear=0x0120c302, mmuset=0x30c23c7d, ucset=0x00c01c7c + + .previous diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S index 2c559ac..7e9b5bf 100644 --- a/arch/arm/mm/proc-v7.S +++ b/arch/arm/mm/proc-v7.S @@ -19,24 +19,11 @@ #include "proc-macros.S" -#define TTB_S (1 << 1) -#define TTB_RGN_NC (0 << 3) -#define TTB_RGN_OC_WBWA (1 << 3) -#define TTB_RGN_OC_WT (2 << 3) -#define TTB_RGN_OC_WB (3 << 3) -#define TTB_NOS (1 << 5) -#define TTB_IRGN_NC ((0 << 0) | (0 << 6)) -#define TTB_IRGN_WBWA ((0 << 0) | (1 << 6)) -#define TTB_IRGN_WT ((1 << 0) | (0 << 6)) -#define TTB_IRGN_WB ((1 << 0) | (1 << 6)) - -/* PTWs cacheable, inner WB not shareable, outer WB not shareable */ -#define TTB_FLAGS_UP TTB_IRGN_WB|TTB_RGN_OC_WB -#define PMD_FLAGS_UP PMD_SECT_WB - -/* PTWs cacheable, inner WBWA shareable, outer WBWA not shareable */ -#define TTB_FLAGS_SMP TTB_IRGN_WBWA|TTB_S|TTB_NOS|TTB_RGN_OC_WBWA -#define PMD_FLAGS_SMP PMD_SECT_WBWA|PMD_SECT_S +#ifdef CONFIG_ARM_LPAE +#include "proc-v7-3level.S" +#else +#include "proc-v7-2level.S" +#endif ENTRY(cpu_v7_proc_init) mov pc, lr @@ -63,6 +50,7 @@ ENDPROC(cpu_v7_proc_fin) * caches disabled. */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_v7_reset) mrc p15, 0, r1, c1, c0, 0 @ ctrl register bic r1, r1, #0x1 @ ...............m @@ -71,6 +59,7 @@ ENTRY(cpu_v7_reset) isb mov pc, r0 ENDPROC(cpu_v7_reset) + .popsection /* * cpu_v7_do_idle() @@ -97,127 +86,12 @@ ENTRY(cpu_v7_dcache_clean_area) mov pc, lr ENDPROC(cpu_v7_dcache_clean_area) -/* - * cpu_v7_switch_mm(pgd_phys, tsk) - * - * Set the translation table base pointer to be pgd_phys - * - * - pgd_phys - physical address of new TTB - * - * It is assumed that: - * - we are not using split page tables - */ -ENTRY(cpu_v7_switch_mm) -#ifdef CONFIG_MMU - mov r2, #0 - ldr r1, [r1, #MM_CONTEXT_ID] @ get mm->context.id - ALT_SMP(orr r0, r0, #TTB_FLAGS_SMP) - ALT_UP(orr r0, r0, #TTB_FLAGS_UP) -#ifdef CONFIG_ARM_ERRATA_430973 - mcr p15, 0, r2, c7, c5, 6 @ flush BTAC/BTB -#endif -#ifdef CONFIG_ARM_ERRATA_754322 - dsb -#endif - mcr p15, 0, r2, c13, c0, 1 @ set reserved context ID - isb -1: mcr p15, 0, r0, c2, c0, 0 @ set TTB 0 - isb -#ifdef CONFIG_ARM_ERRATA_754322 - dsb -#endif - mcr p15, 0, r1, c13, c0, 1 @ set context ID - isb -#endif - mov pc, lr -ENDPROC(cpu_v7_switch_mm) - -/* - * cpu_v7_set_pte_ext(ptep, pte) - * - * Set a level 2 translation table entry. - * - * - ptep - pointer to level 2 translation table entry - * (hardware version is stored at +2048 bytes) - * - pte - PTE value to store - * - ext - value for extended PTE bits - */ -ENTRY(cpu_v7_set_pte_ext) -#ifdef CONFIG_MMU - str r1, [r0] @ linux version - - bic r3, r1, #0x000003f0 - bic r3, r3, #PTE_TYPE_MASK - orr r3, r3, r2 - orr r3, r3, #PTE_EXT_AP0 | 2 - - tst r1, #1 << 4 - orrne r3, r3, #PTE_EXT_TEX(1) - - eor r1, r1, #L_PTE_DIRTY - tst r1, #L_PTE_RDONLY | L_PTE_DIRTY - orrne r3, r3, #PTE_EXT_APX - - tst r1, #L_PTE_USER - orrne r3, r3, #PTE_EXT_AP1 -#ifdef CONFIG_CPU_USE_DOMAINS - @ allow kernel read/write access to read-only user pages - tstne r3, #PTE_EXT_APX - bicne r3, r3, #PTE_EXT_APX | PTE_EXT_AP0 -#endif - - tst r1, #L_PTE_XN - orrne r3, r3, #PTE_EXT_XN - - tst r1, #L_PTE_YOUNG - tstne r1, #L_PTE_PRESENT - moveq r3, #0 - - ARM( str r3, [r0, #2048]! ) - THUMB( add r0, r0, #2048 ) - THUMB( str r3, [r0] ) - mcr p15, 0, r0, c7, c10, 1 @ flush_pte -#endif - mov pc, lr -ENDPROC(cpu_v7_set_pte_ext) - string cpu_v7_name, "ARMv7 Processor" .align - /* - * Memory region attributes with SCTLR.TRE=1 - * - * n = TEX[0],C,B - * TR = PRRR[2n+1:2n] - memory type - * IR = NMRR[2n+1:2n] - inner cacheable property - * OR = NMRR[2n+17:2n+16] - outer cacheable property - * - * n TR IR OR - * UNCACHED 000 00 - * BUFFERABLE 001 10 00 00 - * WRITETHROUGH 010 10 10 10 - * WRITEBACK 011 10 11 11 - * reserved 110 - * WRITEALLOC 111 10 01 01 - * DEV_SHARED 100 01 - * DEV_NONSHARED 100 01 - * DEV_WC 001 10 - * DEV_CACHED 011 10 - * - * Other attributes: - * - * DS0 = PRRR[16] = 0 - device shareable property - * DS1 = PRRR[17] = 1 - device shareable property - * NS0 = PRRR[18] = 0 - normal shareable property - * NS1 = PRRR[19] = 1 - normal shareable property - * NOS = PRRR[24+n] = 1 - not outer shareable - */ -.equ PRRR, 0xff0a81a8 -.equ NMRR, 0x40e040e0 - /* Suspend/resume support: derived from arch/arm/mach-s5pv210/sleep.S */ .globl cpu_v7_suspend_size -.equ cpu_v7_suspend_size, 4 * 7 +.equ cpu_v7_suspend_size, 4 * 8 #ifdef CONFIG_ARM_CPU_SUSPEND ENTRY(cpu_v7_do_suspend) stmfd sp!, {r4 - r10, lr} @@ -226,10 +100,11 @@ ENTRY(cpu_v7_do_suspend) stmia r0!, {r4 - r5} mrc p15, 0, r6, c3, c0, 0 @ Domain ID mrc p15, 0, r7, c2, c0, 1 @ TTB 1 + mrc p15, 0, r11, c2, c0, 2 @ TTB control register mrc p15, 0, r8, c1, c0, 0 @ Control register mrc p15, 0, r9, c1, c0, 1 @ Auxiliary control register mrc p15, 0, r10, c1, c0, 2 @ Co-processor access control - stmia r0, {r6 - r10} + stmia r0, {r6 - r11} ldmfd sp!, {r4 - r10, pc} ENDPROC(cpu_v7_do_suspend) @@ -241,13 +116,15 @@ ENTRY(cpu_v7_do_resume) ldmia r0!, {r4 - r5} mcr p15, 0, r4, c13, c0, 0 @ FCSE/PID mcr p15, 0, r5, c13, c0, 3 @ User r/o thread ID - ldmia r0, {r6 - r10} + ldmia r0, {r6 - r11} mcr p15, 0, r6, c3, c0, 0 @ Domain ID +#ifndef CONFIG_ARM_LPAE ALT_SMP(orr r1, r1, #TTB_FLAGS_SMP) ALT_UP(orr r1, r1, #TTB_FLAGS_UP) +#endif mcr p15, 0, r1, c2, c0, 0 @ TTB 0 mcr p15, 0, r7, c2, c0, 1 @ TTB 1 - mcr p15, 0, ip, c2, c0, 2 @ TTB control register + mcr p15, 0, r11, c2, c0, 2 @ TTB control register mrc p15, 0, r4, c1, c0, 1 @ Read Auxiliary control register teq r4, r9 @ Is it already set? mcrne p15, 0, r9, c1, c0, 1 @ No, so write it @@ -284,6 +161,7 @@ __v7_ca5mp_setup: __v7_ca9mp_setup: mov r10, #(1 << 0) @ TLB ops broadcasting b 1f +__v7_ca7mp_setup: __v7_ca15mp_setup: mov r10, #0 1: @@ -363,11 +241,13 @@ __v7_setup: orreq r10, r10, #1 << 6 @ set bit #6 mcreq p15, 0, r10, c15, c0, 1 @ write diagnostic register #endif -#ifdef CONFIG_ARM_ERRATA_751472 - cmp r6, #0x30 @ present prior to r3p0 +#if defined(CONFIG_ARM_ERRATA_751472) && defined(CONFIG_SMP) + ALT_SMP(cmp r6, #0x30) @ present prior to r3p0 + ALT_UP_B(1f) mrclt p15, 0, r10, c15, c0, 1 @ read diagnostic register orrlt r10, r10, #1 << 11 @ set bit #11 mcrlt p15, 0, r10, c15, c0, 1 @ write diagnostic register +1: #endif 3: mov r10, #0 @@ -377,12 +257,7 @@ __v7_setup: dsb #ifdef CONFIG_MMU mcr p15, 0, r10, c8, c7, 0 @ invalidate I + D TLBs - mcr p15, 0, r10, c2, c0, 2 @ TTB control register - ALT_SMP(orr r4, r4, #TTB_FLAGS_SMP) - ALT_UP(orr r4, r4, #TTB_FLAGS_UP) - ALT_SMP(orr r8, r8, #TTB_FLAGS_SMP) - ALT_UP(orr r8, r8, #TTB_FLAGS_UP) - mcr p15, 0, r8, c2, c0, 1 @ load TTB1 + v7_ttb_setup r10, r4, r8, r5 @ TTBCR, TTBRx setup ldr r5, =PRRR @ PRRR ldr r6, =NMRR @ NMRR mcr p15, 0, r5, c10, c2, 0 @ write PRRR @@ -404,16 +279,7 @@ __v7_setup: mov pc, lr @ return to head.S:__ret ENDPROC(__v7_setup) - /* AT - * TFR EV X F I D LR S - * .EEE ..EE PUI. .T.T 4RVI ZWRS BLDP WCAM - * rxxx rrxx xxx0 0101 xxxx xxxx x111 xxxx < forced - * 1 0 110 0011 1100 .111 1101 < we want - */ - .type v7_crval, #object -v7_crval: - crval clear=0x0120c302, mmuset=0x10c03c7d, ucset=0x00c01c7c - + .align 2 __v7_setup_stack: .space 4 * 11 @ 11 registers @@ -435,11 +301,11 @@ __v7_setup_stack: */ .macro __v7_proc initfunc, mm_mmuflags = 0, io_mmuflags = 0, hwcaps = 0 ALT_SMP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \ - PMD_FLAGS_SMP | \mm_mmuflags) + PMD_SECT_AF | PMD_FLAGS_SMP | \mm_mmuflags) ALT_UP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \ - PMD_FLAGS_UP | \mm_mmuflags) - .long PMD_TYPE_SECT | PMD_SECT_XN | PMD_SECT_AP_WRITE | \ - PMD_SECT_AP_READ | \io_mmuflags + PMD_SECT_AF | PMD_FLAGS_UP | \mm_mmuflags) + .long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | \ + PMD_SECT_AP_READ | PMD_SECT_AF | \io_mmuflags W(b) \initfunc .long cpu_arch_name .long cpu_elf_name @@ -452,6 +318,7 @@ __v7_setup_stack: .long v7_cache_fns .endm +#ifndef CONFIG_ARM_LPAE /* * ARM Ltd. Cortex A5 processor. */ @@ -463,6 +330,16 @@ __v7_ca5mp_proc_info: .size __v7_ca5mp_proc_info, . - __v7_ca5mp_proc_info /* + * ARM Ltd. Cortex A7 processor. + */ + .type __v7_ca7mp_proc_info, #object +__v7_ca7mp_proc_info: + .long 0x410fc070 + .long 0xff0ffff0 + __v7_proc __v7_ca7mp_setup, hwcaps = HWCAP_IDIV + .size __v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info + + /* * ARM Ltd. Cortex A9 processor. */ .type __v7_ca9mp_proc_info, #object @@ -471,6 +348,7 @@ __v7_ca9mp_proc_info: .long 0xff0ffff0 __v7_proc __v7_ca9mp_setup .size __v7_ca9mp_proc_info, . - __v7_ca9mp_proc_info +#endif /* CONFIG_ARM_LPAE */ /* * ARM Ltd. Cortex A15 processor. diff --git a/arch/arm/mm/proc-xsc3.S b/arch/arm/mm/proc-xsc3.S index abf0507..b0d5786 100644 --- a/arch/arm/mm/proc-xsc3.S +++ b/arch/arm/mm/proc-xsc3.S @@ -105,6 +105,7 @@ ENTRY(cpu_xsc3_proc_fin) * loc: location to jump to for soft reset */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_xsc3_reset) mov r1, #PSR_F_BIT|PSR_I_BIT|SVC_MODE msr cpsr_c, r1 @ reset CPSR @@ -119,6 +120,8 @@ ENTRY(cpu_xsc3_reset) @ already containing those two last instructions to survive. mcr p15, 0, ip, c8, c7, 0 @ invalidate I and D TLBs mov pc, r0 +ENDPROC(cpu_xsc3_reset) + .popsection /* * cpu_xsc3_do_idle() diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S index 3277904..4ffebaa 100644 --- a/arch/arm/mm/proc-xscale.S +++ b/arch/arm/mm/proc-xscale.S @@ -142,6 +142,7 @@ ENTRY(cpu_xscale_proc_fin) * Beware PXA270 erratum E7. */ .align 5 + .pushsection .idmap.text, "ax" ENTRY(cpu_xscale_reset) mov r1, #PSR_F_BIT|PSR_I_BIT|SVC_MODE msr cpsr_c, r1 @ reset CPSR @@ -160,6 +161,8 @@ ENTRY(cpu_xscale_reset) @ already containing those two last instructions to survive. mcr p15, 0, ip, c8, c7, 0 @ invalidate I & D TLBs mov pc, r0 +ENDPROC(cpu_xscale_reset) + .popsection /* * cpu_xscale_do_idle() |
