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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-20 12:41:58 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-20 12:55:49 +0100 |
| commit | c88d6aa71bd2ad7b4da2f281bd64ada65d533d83 (patch) | |
| tree | dbc0f5ad6f48abddde2072300b0e4617d7d46cd4 /arch/arm/mm/fault.c | |
| parent | 4275c13ca8859af8a1390856c82173bcdfc32938 (diff) | |
| download | linux-3.10-c88d6aa71bd2ad7b4da2f281bd64ada65d533d83.tar.gz linux-3.10-c88d6aa71bd2ad7b4da2f281bd64ada65d533d83.tar.bz2 linux-3.10-c88d6aa71bd2ad7b4da2f281bd64ada65d533d83.zip | |
ARM: Provide definitions and helpers for decoding the FSR register
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/fault.c')
| -rw-r--r-- | arch/arm/mm/fault.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index cc8829d7e11..1bb38712c86 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -25,6 +25,18 @@ #include "fault.h" +/* + * Fault status register encodings + */ +#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 @@ -201,7 +213,7 @@ __do_page_fault(struct mm_struct *mm, unsigned long addr, unsigned int fsr, * memory access, so we can handle it. */ good_area: - if (fsr & (1 << 11)) /* write? */ + if (fsr & FSR_WRITE) mask = VM_WRITE; else mask = VM_READ|VM_EXEC|VM_WRITE; @@ -216,7 +228,7 @@ good_area: * than endlessly redo the fault. */ survive: - fault = handle_mm_fault(mm, vma, addr & PAGE_MASK, (fsr & (1 << 11)) ? FAULT_FLAG_WRITE : 0); + fault = handle_mm_fault(mm, vma, addr & PAGE_MASK, (fsr & FSR_WRITE) ? FAULT_FLAG_WRITE : 0); if (unlikely(fault & VM_FAULT_ERROR)) { if (fault & VM_FAULT_OOM) goto out_of_memory; @@ -489,7 +501,7 @@ hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int, struct pt_regs *) asmlinkage void __exception do_DataAbort(unsigned long addr, unsigned int fsr, struct pt_regs *regs) { - const struct fsr_info *inf = fsr_info + (fsr & 15) + ((fsr & (1 << 10)) >> 6); + const struct fsr_info *inf = fsr_info + fsr_fs(fsr); struct siginfo info; if (!inf->fn(addr, fsr, regs)) |