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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* cacheflush.h: FRV cache flushing routines
2 *
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#ifndef _ASM_CACHEFLUSH_H
13#define _ASM_CACHEFLUSH_H
14
15/* Keep includes the same across arches. */
16#include <linux/mm.h>
17
18/*
19 * virtually-indexed cache management (our cache is physically indexed)
20 */
21#define flush_cache_all() do {} while(0)
22#define flush_cache_mm(mm) do {} while(0)
Ralf Baechleec8c0442006-12-12 17:14:57 +000023#define flush_cache_dup_mm(mm) do {} while(0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#define flush_cache_range(mm, start, end) do {} while(0)
25#define flush_cache_page(vma, vmaddr, pfn) do {} while(0)
26#define flush_cache_vmap(start, end) do {} while(0)
27#define flush_cache_vunmap(start, end) do {} while(0)
28#define flush_dcache_mmap_lock(mapping) do {} while(0)
29#define flush_dcache_mmap_unlock(mapping) do {} while(0)
30
31/*
32 * physically-indexed cache managment
33 * - see arch/frv/lib/cache.S
34 */
35extern void frv_dcache_writeback(unsigned long start, unsigned long size);
36extern void frv_cache_invalidate(unsigned long start, unsigned long size);
37extern void frv_icache_invalidate(unsigned long start, unsigned long size);
38extern void frv_cache_wback_inv(unsigned long start, unsigned long size);
39
40static inline void __flush_cache_all(void)
41{
42 asm volatile(" dcef @(gr0,gr0),#1 \n"
43 " icei @(gr0,gr0),#1 \n"
44 " membar \n"
45 : : : "memory"
46 );
47}
48
49/* dcache/icache coherency... */
50#ifdef CONFIG_MMU
51extern void flush_dcache_page(struct page *page);
52#else
53static inline void flush_dcache_page(struct page *page)
54{
55 unsigned long addr = page_to_phys(page);
56 frv_dcache_writeback(addr, addr + PAGE_SIZE);
57}
58#endif
59
60static inline void flush_page_to_ram(struct page *page)
61{
62 flush_dcache_page(page);
63}
64
65static inline void flush_icache(void)
66{
67 __flush_cache_all();
68}
69
70static inline void flush_icache_range(unsigned long start, unsigned long end)
71{
72 frv_cache_wback_inv(start, end);
73}
74
75#ifdef CONFIG_MMU
76extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
77 unsigned long start, unsigned long len);
78#else
79static inline void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
80 unsigned long start, unsigned long len)
81{
82 frv_cache_wback_inv(start, start + len);
83}
84#endif
85
86static inline void flush_icache_page(struct vm_area_struct *vma, struct page *page)
87{
88 flush_icache_user_range(vma, page, page_to_phys(page), PAGE_SIZE);
89}
90
David Howells68f624f2006-02-14 13:53:18 -080091/*
92 * permit ptrace to access another process's address space through the icache
93 * and the dcache
94 */
95#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
96do { \
97 memcpy((dst), (src), (len)); \
98 flush_icache_user_range((vma), (page), (vaddr), (len)); \
99} while(0)
100
101#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
102 memcpy((dst), (src), (len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
104#endif /* _ASM_CACHEFLUSH_H */