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[ARM] Fix ARMv6 VIPT cache >= 32K

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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>
This commit is contained in:
Russell King 2005-09-08 15:32:23 +01:00 committed by Russell King
parent b38d950d3a
commit d7b6b35894
2 changed files with 58 additions and 1 deletions
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52
arch/arm/mm/flush.c
View file

@ -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)

7
include/asm-arm/cacheflush.h
View file

@ -256,7 +256,7 @@ extern void dmac_flush_range(unsigned long, unsigned long);
* Convert calls to our calling convention.
*/
#define flush_cache_all() __cpuc_flush_kern_all()
#ifndef CONFIG_CPU_CACHE_VIPT
static inline void flush_cache_mm(struct mm_struct *mm)
{
if (cpu_isset(smp_processor_id(), mm->cpu_vm_mask))
@ -279,6 +279,11 @@ flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned l
__cpuc_flush_user_range(addr, addr + PAGE_SIZE, vma->vm_flags);
}
}
#else
extern void flush_cache_mm(struct mm_struct *mm);
extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
extern void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long pfn);
#endif
/*
* flush_cache_user_range is used when we want to ensure that the