Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle
7 * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
8 */
9#ifndef _ASM_CACHEFLUSH_H
10#define _ASM_CACHEFLUSH_H
11
12/* Keep includes the same across arches. */
13#include <linux/mm.h>
14#include <asm/cpu-features.h>
15
16/* Cache flushing:
17 *
18 * - flush_cache_all() flushes entire cache
19 * - flush_cache_mm(mm) flushes the specified mm context's cache lines
20 * - flush_cache_page(mm, vmaddr, pfn) flushes a single page
21 * - flush_cache_range(vma, start, end) flushes a range of pages
22 * - flush_icache_range(start, end) flush a range of instructions
23 * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
24 *
25 * MIPS specific flush operations:
26 *
27 * - flush_cache_sigtramp() flush signal trampoline
28 * - flush_icache_all() flush the entire instruction cache
29 * - flush_data_cache_page() flushes a page from the data cache
30 */
31extern void (*flush_cache_all)(void);
32extern void (*__flush_cache_all)(void);
33extern void (*flush_cache_mm)(struct mm_struct *mm);
34extern void (*flush_cache_range)(struct vm_area_struct *vma,
35 unsigned long start, unsigned long end);
36extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn);
37extern void __flush_dcache_page(struct page *page);
38
39static inline void flush_dcache_page(struct page *page)
40{
41 if (cpu_has_dc_aliases || !cpu_has_ic_fills_f_dc)
42 __flush_dcache_page(page);
43
44}
45
46#define flush_dcache_mmap_lock(mapping) do { } while (0)
47#define flush_dcache_mmap_unlock(mapping) do { } while (0)
48
49static inline void flush_icache_page(struct vm_area_struct *vma,
50 struct page *page)
51{
52}
53
54extern void (*flush_icache_range)(unsigned long start, unsigned long end);
55#define flush_cache_vmap(start, end) flush_cache_all()
56#define flush_cache_vunmap(start, end) flush_cache_all()
57
58extern void copy_to_user_page(struct vm_area_struct *vma,
59 struct page *page, unsigned long vaddr, void *dst, const void *src,
60 unsigned long len);
61
62extern void copy_from_user_page(struct vm_area_struct *vma,
63 struct page *page, unsigned long vaddr, void *dst, const void *src,
64 unsigned long len);
65
66extern void (*flush_cache_sigtramp)(unsigned long addr);
67extern void (*flush_icache_all)(void);
68extern void (*local_flush_data_cache_page)(void * addr);
69extern void (*flush_data_cache_page)(unsigned long addr);
70
71/*
72 * This flag is used to indicate that the page pointed to by a pte
73 * is dirty and requires cleaning before returning it to the user.
74 */
75#define PG_dcache_dirty PG_arch_1
76
77#define Page_dcache_dirty(page) \
78 test_bit(PG_dcache_dirty, &(page)->flags)
79#define SetPageDcacheDirty(page) \
80 set_bit(PG_dcache_dirty, &(page)->flags)
81#define ClearPageDcacheDirty(page) \
82 clear_bit(PG_dcache_dirty, &(page)->flags)
83
84/* Run kernel code uncached, useful for cache probing functions. */
85unsigned long __init run_uncached(void *func);
86
87#endif /* _ASM_CACHEFLUSH_H */