94 lines
3.2 KiB
C
94 lines
3.2 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle
|
|
* Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
|
|
*/
|
|
#ifndef _ASM_CACHEFLUSH_H
|
|
#define _ASM_CACHEFLUSH_H
|
|
|
|
/* Keep includes the same across arches. */
|
|
#include <linux/mm.h>
|
|
#include <asm/cpu-features.h>
|
|
|
|
/* Cache flushing:
|
|
*
|
|
* - flush_cache_all() flushes entire cache
|
|
* - flush_cache_mm(mm) flushes the specified mm context's cache lines
|
|
* - flush_cache_page(mm, vmaddr, pfn) flushes a single page
|
|
* - flush_cache_range(vma, start, end) flushes a range of pages
|
|
* - flush_icache_range(start, end) flush a range of instructions
|
|
* - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
|
|
* - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
|
|
*
|
|
* MIPS specific flush operations:
|
|
*
|
|
* - flush_cache_sigtramp() flush signal trampoline
|
|
* - flush_icache_all() flush the entire instruction cache
|
|
* - flush_data_cache_page() flushes a page from the data cache
|
|
*/
|
|
extern void (*flush_cache_all)(void);
|
|
extern void (*__flush_cache_all)(void);
|
|
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 page, unsigned long pfn);
|
|
extern void __flush_dcache_page(struct page *page);
|
|
|
|
static inline void flush_dcache_page(struct page *page)
|
|
{
|
|
if (cpu_has_dc_aliases)
|
|
__flush_dcache_page(page);
|
|
|
|
}
|
|
|
|
#define flush_dcache_mmap_lock(mapping) do { } while (0)
|
|
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
|
|
|
|
extern void (*flush_icache_page)(struct vm_area_struct *vma,
|
|
struct page *page);
|
|
extern void (*flush_icache_range)(unsigned long __user start,
|
|
unsigned long __user end);
|
|
#define flush_cache_vmap(start, end) flush_cache_all()
|
|
#define flush_cache_vunmap(start, end) flush_cache_all()
|
|
|
|
static inline void copy_to_user_page(struct vm_area_struct *vma,
|
|
struct page *page, unsigned long vaddr, void *dst, const void *src,
|
|
unsigned long len)
|
|
{
|
|
if (cpu_has_dc_aliases)
|
|
flush_cache_page(vma, vaddr, page_to_pfn(page));
|
|
memcpy(dst, src, len);
|
|
flush_icache_page(vma, page);
|
|
}
|
|
|
|
static inline void copy_from_user_page(struct vm_area_struct *vma,
|
|
struct page *page, unsigned long vaddr, void *dst, const void *src,
|
|
unsigned long len)
|
|
{
|
|
if (cpu_has_dc_aliases)
|
|
flush_cache_page(vma, vaddr, page_to_pfn(page));
|
|
memcpy(dst, src, len);
|
|
}
|
|
|
|
extern void (*flush_cache_sigtramp)(unsigned long addr);
|
|
extern void (*flush_icache_all)(void);
|
|
extern void (*flush_data_cache_page)(unsigned long addr);
|
|
|
|
/*
|
|
* This flag is used to indicate that the page pointed to by a pte
|
|
* is dirty and requires cleaning before returning it to the user.
|
|
*/
|
|
#define PG_dcache_dirty PG_arch_1
|
|
|
|
#define Page_dcache_dirty(page) \
|
|
test_bit(PG_dcache_dirty, &(page)->flags)
|
|
#define SetPageDcacheDirty(page) \
|
|
set_bit(PG_dcache_dirty, &(page)->flags)
|
|
#define ClearPageDcacheDirty(page) \
|
|
clear_bit(PG_dcache_dirty, &(page)->flags)
|
|
|
|
#endif /* _ASM_CACHEFLUSH_H */
|