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author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2005-09-08 15:32:23 +0100 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-09-08 15:32:23 +0100 |
commit | d7b6b3589471c3856f1e6dc9c77abc4af962ffdb (patch) | |
tree | 82751eba321a062ce91af7f0f0bff8c4c5531a1c /arch/arm | |
parent | b38d950d3aedf90c8b15b3c7c799b5eb53c47c45 (diff) | |
download | kernel_samsung_aries-d7b6b3589471c3856f1e6dc9c77abc4af962ffdb.zip kernel_samsung_aries-d7b6b3589471c3856f1e6dc9c77abc4af962ffdb.tar.gz kernel_samsung_aries-d7b6b3589471c3856f1e6dc9c77abc4af962ffdb.tar.bz2 |
[ARM] Fix ARMv6 VIPT cache >= 32K
This adds the necessary changes to ensure that we flush the
caches correctly with aliasing VIPT caches.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/mm/flush.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c index 191788f..b0208c9 100644 --- a/arch/arm/mm/flush.c +++ b/arch/arm/mm/flush.c @@ -16,6 +16,58 @@ #include <asm/tlbflush.h> #ifdef CONFIG_CPU_CACHE_VIPT + +void flush_cache_mm(struct mm_struct *mm) +{ + if (cache_is_vivt()) { + if (cpu_isset(smp_processor_id(), mm->cpu_vm_mask)) + __cpuc_flush_user_all(); + return; + } + + if (cache_is_vipt_aliasing()) { + asm( "mcr p15, 0, %0, c7, c14, 0\n" + " mcr p15, 0, %0, c7, c5, 0\n" + " mcr p15, 0, %0, c7, c10, 4" + : + : "r" (0) + : "cc"); + } +} + +void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) +{ + if (cache_is_vivt()) { + if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) + __cpuc_flush_user_range(start & PAGE_MASK, PAGE_ALIGN(end), + vma->vm_flags); + return; + } + + if (cache_is_vipt_aliasing()) { + asm( "mcr p15, 0, %0, c7, c14, 0\n" + " mcr p15, 0, %0, c7, c5, 0\n" + " mcr p15, 0, %0, c7, c10, 4" + : + : "r" (0) + : "cc"); + } +} + +void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long pfn) +{ + if (cache_is_vivt()) { + if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) { + unsigned long addr = user_addr & PAGE_MASK; + __cpuc_flush_user_range(addr, addr + PAGE_SIZE, vma->vm_flags); + } + return; + } + + if (cache_is_vipt_aliasing()) + flush_pfn_alias(pfn, user_addr); +} + #define ALIAS_FLUSH_START 0xffff4000 #define TOP_PTE(x) pte_offset_kernel(top_pmd, x) |