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[MIPS] Implement flush_anon_page().

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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2007-03-23 21:36:37 +00:00
parent 80e89593e5
commit 7575a49f20
3 changed files with 29 additions and 3 deletions
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16
arch/mips/mm/cache.c
View File

@ -3,7 +3,8 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1994 - 2003 by Ralf Baechle
* Copyright (C) 1994 - 2003, 07 by Ralf Baechle (ralf@linux-mips.org)
* Copyright (C) 2007 MIPS Technologies, Inc.
*/
#include <linux/init.h>
#include <linux/kernel.h>
@ -88,6 +89,19 @@ void __flush_dcache_page(struct page *page)
EXPORT_SYMBOL(__flush_dcache_page);
void __flush_anon_page(struct page *page, unsigned long vmaddr)
{
if (pages_do_alias((unsigned long)page_address(page), vmaddr)) {
void *kaddr;
kaddr = kmap_coherent(page, vmaddr);
flush_data_cache_page((unsigned long)kaddr);
kunmap_coherent(kaddr);
}
}
EXPORT_SYMBOL(__flush_anon_page);
void __update_cache(struct vm_area_struct *vma, unsigned long address,
pte_t pte)
{

4
arch/mips/mm/init.c
View File

@ -123,7 +123,7 @@ static void __init kmap_coherent_init(void)
static inline void kmap_coherent_init(void) {}
#endif
static inline void *kmap_coherent(struct page *page, unsigned long addr)
void *kmap_coherent(struct page *page, unsigned long addr)
{
enum fixed_addresses idx;
unsigned long vaddr, flags, entrylo;
@ -177,7 +177,7 @@ static inline void *kmap_coherent(struct page *page, unsigned long addr)
#define UNIQUE_ENTRYHI(idx) (CKSEG0 + ((idx) << (PAGE_SHIFT + 1)))
static inline void kunmap_coherent(struct page *page)
void kunmap_coherent(struct page *page)
{
#ifndef CONFIG_MIPS_MT_SMTC
unsigned int wired;

12
include/asm-mips/cacheflush.h
View File

@ -48,6 +48,15 @@ static inline void flush_dcache_page(struct page *page)
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
#define ARCH_HAS_FLUSH_ANON_PAGE
extern void __flush_anon_page(struct page *, unsigned long);
static inline void flush_anon_page(struct vm_area_struct *vma,
struct page *page, unsigned long vmaddr)
{
if (cpu_has_dc_aliases && PageAnon(page))
__flush_anon_page(page, vmaddr);
}
static inline void flush_icache_page(struct vm_area_struct *vma,
struct page *page)
{
@ -86,4 +95,7 @@ extern void (*flush_data_cache_page)(unsigned long addr);
/* Run kernel code uncached, useful for cache probing functions. */
unsigned long __init run_uncached(void *func);
extern void *kmap_coherent(struct page *page, unsigned long addr);
extern void kunmap_coherent(struct page *page);
#endif /* _ASM_CACHEFLUSH_H */