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-rw-r--r--arch/sh/include/asm/cacheflush.h114
1 files changed, 65 insertions, 49 deletions
diff --git a/arch/sh/include/asm/cacheflush.h b/arch/sh/include/asm/cacheflush.h
index 4c5462daa74c..c29918f3c819 100644
--- a/arch/sh/include/asm/cacheflush.h
+++ b/arch/sh/include/asm/cacheflush.h
@@ -3,45 +3,65 @@
3 3
4#ifdef __KERNEL__ 4#ifdef __KERNEL__
5 5
6#ifdef CONFIG_CACHE_OFF 6#include <linux/mm.h>
7
7/* 8/*
8 * Nothing to do when the cache is disabled, initial flush and explicit 9 * Cache flushing:
9 * disabling is handled at CPU init time. 10 *
11 * - flush_cache_all() flushes entire cache
12 * - flush_cache_mm(mm) flushes the specified mm context's cache lines
13 * - flush_cache_dup mm(mm) handles cache flushing when forking
14 * - flush_cache_page(mm, vmaddr, pfn) flushes a single page
15 * - flush_cache_range(vma, start, end) flushes a range of pages
10 * 16 *
11 * See arch/sh/kernel/cpu/init.c:cache_init(). 17 * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
18 * - flush_icache_range(start, end) flushes(invalidates) a range for icache
19 * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
20 * - flush_cache_sigtramp(vaddr) flushes the signal trampoline
12 */ 21 */
13#define p3_cache_init() do { } while (0) 22extern void (*local_flush_cache_all)(void *args);
14#define flush_cache_all() do { } while (0) 23extern void (*local_flush_cache_mm)(void *args);
15#define flush_cache_mm(mm) do { } while (0) 24extern void (*local_flush_cache_dup_mm)(void *args);
16#define flush_cache_dup_mm(mm) do { } while (0) 25extern void (*local_flush_cache_page)(void *args);
17#define flush_cache_range(vma, start, end) do { } while (0) 26extern void (*local_flush_cache_range)(void *args);
18#define flush_cache_page(vma, vmaddr, pfn) do { } while (0) 27extern void (*local_flush_dcache_page)(void *args);
19#define flush_dcache_page(page) do { } while (0) 28extern void (*local_flush_icache_range)(void *args);
20#define flush_icache_range(start, end) do { } while (0) 29extern void (*local_flush_icache_page)(void *args);
21#define flush_icache_page(vma,pg) do { } while (0) 30extern void (*local_flush_cache_sigtramp)(void *args);
22#define flush_dcache_mmap_lock(mapping) do { } while (0)
23#define flush_dcache_mmap_unlock(mapping) do { } while (0)
24#define flush_cache_sigtramp(vaddr) do { } while (0)
25#define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
26#define __flush_wback_region(start, size) do { (void)(start); } while (0)
27#define __flush_purge_region(start, size) do { (void)(start); } while (0)
28#define __flush_invalidate_region(start, size) do { (void)(start); } while (0)
29#else
30#include <cpu/cacheflush.h>
31 31
32/* 32static inline void cache_noop(void *args) { }
33 * Consistent DMA requires that the __flush_xxx() primitives must be set 33
34 * for any of the enabled non-coherent caches (most of the UP CPUs), 34extern void (*__flush_wback_region)(void *start, int size);
35 * regardless of PIPT or VIPT cache configurations. 35extern void (*__flush_purge_region)(void *start, int size);
36 */ 36extern void (*__flush_invalidate_region)(void *start, int size);
37
38extern void flush_cache_all(void);
39extern void flush_cache_mm(struct mm_struct *mm);
40extern void flush_cache_dup_mm(struct mm_struct *mm);
41extern void flush_cache_page(struct vm_area_struct *vma,
42 unsigned long addr, unsigned long pfn);
43extern void flush_cache_range(struct vm_area_struct *vma,
44 unsigned long start, unsigned long end);
45extern void flush_dcache_page(struct page *page);
46extern void flush_icache_range(unsigned long start, unsigned long end);
47extern void flush_icache_page(struct vm_area_struct *vma,
48 struct page *page);
49extern void flush_cache_sigtramp(unsigned long address);
50
51struct flusher_data {
52 struct vm_area_struct *vma;
53 unsigned long addr1, addr2;
54};
37 55
38/* Flush (write-back only) a region (smaller than a page) */ 56#define ARCH_HAS_FLUSH_ANON_PAGE
39extern void __flush_wback_region(void *start, int size); 57extern void __flush_anon_page(struct page *page, unsigned long);
40/* Flush (write-back & invalidate) a region (smaller than a page) */ 58
41extern void __flush_purge_region(void *start, int size); 59static inline void flush_anon_page(struct vm_area_struct *vma,
42/* Flush (invalidate only) a region (smaller than a page) */ 60 struct page *page, unsigned long vmaddr)
43extern void __flush_invalidate_region(void *start, int size); 61{
44#endif 62 if (boot_cpu_data.dcache.n_aliases && PageAnon(page))
63 __flush_anon_page(page, vmaddr);
64}
45 65
46#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE 66#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
47static inline void flush_kernel_dcache_page(struct page *page) 67static inline void flush_kernel_dcache_page(struct page *page)
@@ -49,7 +69,6 @@ static inline void flush_kernel_dcache_page(struct page *page)
49 flush_dcache_page(page); 69 flush_dcache_page(page);
50} 70}
51 71
52#if defined(CONFIG_CPU_SH4) && !defined(CONFIG_CACHE_OFF)
53extern void copy_to_user_page(struct vm_area_struct *vma, 72extern void copy_to_user_page(struct vm_area_struct *vma,
54 struct page *page, unsigned long vaddr, void *dst, const void *src, 73 struct page *page, unsigned long vaddr, void *dst, const void *src,
55 unsigned long len); 74 unsigned long len);
@@ -57,23 +76,20 @@ extern void copy_to_user_page(struct vm_area_struct *vma,
57extern void copy_from_user_page(struct vm_area_struct *vma, 76extern void copy_from_user_page(struct vm_area_struct *vma,
58 struct page *page, unsigned long vaddr, void *dst, const void *src, 77 struct page *page, unsigned long vaddr, void *dst, const void *src,
59 unsigned long len); 78 unsigned long len);
60#else
61#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
62 do { \
63 flush_cache_page(vma, vaddr, page_to_pfn(page));\
64 memcpy(dst, src, len); \
65 flush_icache_user_range(vma, page, vaddr, len); \
66 } while (0)
67
68#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
69 do { \
70 flush_cache_page(vma, vaddr, page_to_pfn(page));\
71 memcpy(dst, src, len); \
72 } while (0)
73#endif
74 79
75#define flush_cache_vmap(start, end) flush_cache_all() 80#define flush_cache_vmap(start, end) flush_cache_all()
76#define flush_cache_vunmap(start, end) flush_cache_all() 81#define flush_cache_vunmap(start, end) flush_cache_all()
77 82
83#define flush_dcache_mmap_lock(mapping) do { } while (0)
84#define flush_dcache_mmap_unlock(mapping) do { } while (0)
85
86void kmap_coherent_init(void);
87void *kmap_coherent(struct page *page, unsigned long addr);
88void kunmap_coherent(void *kvaddr);
89
90#define PG_dcache_dirty PG_arch_1
91
92void cpu_cache_init(void);
93
78#endif /* __KERNEL__ */ 94#endif /* __KERNEL__ */
79#endif /* __ASM_SH_CACHEFLUSH_H */ 95#endif /* __ASM_SH_CACHEFLUSH_H */
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