Linux kernel mirror (for testing)
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linux
1#ifndef __ASM_SH_CACHEFLUSH_H
2#define __ASM_SH_CACHEFLUSH_H
3
4#ifdef __KERNEL__
5
6#ifdef CONFIG_CACHE_OFF
7/*
8 * Nothing to do when the cache is disabled, initial flush and explicit
9 * disabling is handled at CPU init time.
10 *
11 * See arch/sh/kernel/cpu/init.c:cache_init().
12 */
13#define p3_cache_init() do { } while (0)
14#define flush_cache_all() do { } while (0)
15#define flush_cache_mm(mm) do { } while (0)
16#define flush_cache_dup_mm(mm) do { } while (0)
17#define flush_cache_range(vma, start, end) do { } while (0)
18#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
19#define flush_dcache_page(page) do { } while (0)
20#define flush_icache_range(start, end) do { } while (0)
21#define flush_icache_page(vma,pg) do { } while (0)
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 <asm/cpu/cacheflush.h>
31
32/*
33 * Consistent DMA requires that the __flush_xxx() primitives must be set
34 * for any of the enabled non-coherent caches (most of the UP CPUs),
35 * regardless of PIPT or VIPT cache configurations.
36 */
37
38/* Flush (write-back only) a region (smaller than a page) */
39extern void __flush_wback_region(void *start, int size);
40/* Flush (write-back & invalidate) a region (smaller than a page) */
41extern void __flush_purge_region(void *start, int size);
42/* Flush (invalidate only) a region (smaller than a page) */
43extern void __flush_invalidate_region(void *start, int size);
44#endif
45
46#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
47static inline void flush_kernel_dcache_page(struct page *page)
48{
49 flush_dcache_page(page);
50}
51
52#if defined(CONFIG_CPU_SH4) && !defined(CONFIG_CACHE_OFF)
53extern void copy_to_user_page(struct vm_area_struct *vma,
54 struct page *page, unsigned long vaddr, void *dst, const void *src,
55 unsigned long len);
56
57extern void copy_from_user_page(struct vm_area_struct *vma,
58 struct page *page, unsigned long vaddr, void *dst, const void *src,
59 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
75#define flush_cache_vmap(start, end) flush_cache_all()
76#define flush_cache_vunmap(start, end) flush_cache_all()
77
78#define HAVE_ARCH_UNMAPPED_AREA
79
80#endif /* __KERNEL__ */
81#endif /* __ASM_SH_CACHEFLUSH_H */