cacheflush.h 2.7 KB

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  1. #ifndef __ASM_SH_CACHEFLUSH_H
  2. #define __ASM_SH_CACHEFLUSH_H
  3. #ifdef __KERNEL__
  4. #ifdef CONFIG_CACHE_OFF
  5. /*
  6. * Nothing to do when the cache is disabled, initial flush and explicit
  7. * disabling is handled at CPU init time.
  8. *
  9. * See arch/sh/kernel/cpu/init.c:cache_init().
  10. */
  11. #define p3_cache_init() do { } while (0)
  12. #define flush_cache_all() do { } while (0)
  13. #define flush_cache_mm(mm) do { } while (0)
  14. #define flush_cache_dup_mm(mm) do { } while (0)
  15. #define flush_cache_range(vma, start, end) do { } while (0)
  16. #define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
  17. #define flush_dcache_page(page) do { } while (0)
  18. #define flush_icache_range(start, end) do { } while (0)
  19. #define flush_icache_page(vma,pg) do { } while (0)
  20. #define flush_dcache_mmap_lock(mapping) do { } while (0)
  21. #define flush_dcache_mmap_unlock(mapping) do { } while (0)
  22. #define flush_cache_sigtramp(vaddr) do { } while (0)
  23. #define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
  24. #define __flush_wback_region(start, size) do { (void)(start); } while (0)
  25. #define __flush_purge_region(start, size) do { (void)(start); } while (0)
  26. #define __flush_invalidate_region(start, size) do { (void)(start); } while (0)
  27. #else
  28. #include <asm/cpu/cacheflush.h>
  29. /*
  30. * Consistent DMA requires that the __flush_xxx() primitives must be set
  31. * for any of the enabled non-coherent caches (most of the UP CPUs),
  32. * regardless of PIPT or VIPT cache configurations.
  33. */
  34. /* Flush (write-back only) a region (smaller than a page) */
  35. extern void __flush_wback_region(void *start, int size);
  36. /* Flush (write-back & invalidate) a region (smaller than a page) */
  37. extern void __flush_purge_region(void *start, int size);
  38. /* Flush (invalidate only) a region (smaller than a page) */
  39. extern void __flush_invalidate_region(void *start, int size);
  40. #endif
  41. #if defined(CONFIG_CPU_SH4) && !defined(CONFIG_CACHE_OFF)
  42. extern void copy_to_user_page(struct vm_area_struct *vma,
  43. struct page *page, unsigned long vaddr, void *dst, const void *src,
  44. unsigned long len);
  45. extern void copy_from_user_page(struct vm_area_struct *vma,
  46. struct page *page, unsigned long vaddr, void *dst, const void *src,
  47. unsigned long len);
  48. #else
  49. #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  50. do { \
  51. flush_cache_page(vma, vaddr, page_to_pfn(page));\
  52. memcpy(dst, src, len); \
  53. flush_icache_user_range(vma, page, vaddr, len); \
  54. } while (0)
  55. #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  56. do { \
  57. flush_cache_page(vma, vaddr, page_to_pfn(page));\
  58. memcpy(dst, src, len); \
  59. } while (0)
  60. #endif
  61. #define flush_cache_vmap(start, end) flush_cache_all()
  62. #define flush_cache_vunmap(start, end) flush_cache_all()
  63. #define HAVE_ARCH_UNMAPPED_AREA
  64. #endif /* __KERNEL__ */
  65. #endif /* __ASM_SH_CACHEFLUSH_H */