1 /* 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)
23 #define flush_cache_dup_mm(mm) do {} while(0)
24 #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 management
33 * - see arch/frv/lib/cache.S
34 */
35 extern void frv_dcache_writeback(unsigned long start, unsigned long size);
36 extern void frv_cache_invalidate(unsigned long start, unsigned long size);
37 extern void frv_icache_invalidate(unsigned long start, unsigned long size);
38 extern void frv_cache_wback_inv(unsigned long start, unsigned long size);
39
__flush_cache_all(void)40 static 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 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
51 #ifdef CONFIG_MMU
52 extern void flush_dcache_page(struct page *page);
53 #else
flush_dcache_page(struct page * page)54 static inline void flush_dcache_page(struct page *page)
55 {
56 unsigned long addr = page_to_phys(page);
57 frv_dcache_writeback(addr, addr + PAGE_SIZE);
58 }
59 #endif
60
flush_page_to_ram(struct page * page)61 static inline void flush_page_to_ram(struct page *page)
62 {
63 flush_dcache_page(page);
64 }
65
flush_icache(void)66 static inline void flush_icache(void)
67 {
68 __flush_cache_all();
69 }
70
flush_icache_range(unsigned long start,unsigned long end)71 static inline void flush_icache_range(unsigned long start, unsigned long end)
72 {
73 frv_cache_wback_inv(start, end);
74 }
75
76 #ifdef CONFIG_MMU
77 extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
78 unsigned long start, unsigned long len);
79 #else
flush_icache_user_range(struct vm_area_struct * vma,struct page * page,unsigned long start,unsigned long len)80 static inline void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
81 unsigned long start, unsigned long len)
82 {
83 frv_cache_wback_inv(start, start + len);
84 }
85 #endif
86
flush_icache_page(struct vm_area_struct * vma,struct page * page)87 static inline void flush_icache_page(struct vm_area_struct *vma, struct page *page)
88 {
89 flush_icache_user_range(vma, page, page_to_phys(page), PAGE_SIZE);
90 }
91
92 /*
93 * permit ptrace to access another process's address space through the icache
94 * and the dcache
95 */
96 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
97 do { \
98 memcpy((dst), (src), (len)); \
99 flush_icache_user_range((vma), (page), (vaddr), (len)); \
100 } while(0)
101
102 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
103 memcpy((dst), (src), (len))
104
105 #endif /* _ASM_CACHEFLUSH_H */
106