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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-09-08 16:32:23 +0200
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-09-08 16:32:23 +0200
commitd7b6b3589471c3856f1e6dc9c77abc4af962ffdb (patch)
tree82751eba321a062ce91af7f0f0bff8c4c5531a1c /arch/arm/mm/flush.c
parent[ARM] Add suspend/resume support to locomo.c (diff)
downloadlinux-d7b6b3589471c3856f1e6dc9c77abc4af962ffdb.tar.xz
linux-d7b6b3589471c3856f1e6dc9c77abc4af962ffdb.zip
[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/mm/flush.c')
-rw-r--r--arch/arm/mm/flush.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index 191788fb18d1..b0208c992576 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)