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Commit 7575a49f authored by Ralf Baechle's avatar Ralf Baechle
Browse files

[MIPS] Implement flush_anon_page(). 



Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 80e89593

arch/mips/mm/cache.c

+15 −1
Original line number Diff line number Diff line
@@ -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)

{

arch/mips/mm/init.c

+2 −2
Original line number Diff line number Diff line
@@ -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;

include/asm-mips/cacheflush.h

+12 −0
Original line number Diff line number Diff line
@@ -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 */