release/src-rt-6.x.4708/linux/linux-2.6.36/arch/parisc/include/asm/cacheflush.h

   1 #ifndef _PARISC_CACHEFLUSH_H
   2 #define _PARISC_CACHEFLUSH_H
   3
   4 #include <linux/mm.h>
   5 #include <linux/uaccess.h>
   6
   7 /* The usual comment is "Caches aren't brain-dead on the <architecture>".
   8  * Unfortunately, that doesn't apply to PA-RISC. */
   9
  10 /* Internal implementation */
  11 void flush_data_cache_local(void *);  /* flushes local data-cache only */
  12 void flush_instruction_cache_local(void *); /* flushes local code-cache only */
  13 #ifdef CONFIG_SMP
  14 void flush_data_cache(void); /* flushes data-cache only (all processors) */
  15 void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
  16 #else
  17 #define flush_data_cache() flush_data_cache_local(NULL)
  18 #define flush_instruction_cache() flush_instruction_cache_local(NULL)
  19 #endif
  20
  21 #define flush_cache_dup_mm(mm) flush_cache_mm(mm)
  22
  23 void flush_user_icache_range_asm(unsigned long, unsigned long);
  24 void flush_kernel_icache_range_asm(unsigned long, unsigned long);
  25 void flush_user_dcache_range_asm(unsigned long, unsigned long);
  26 void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
  27 void flush_kernel_dcache_page_asm(void *);
  28 void flush_kernel_icache_page(void *);
  29 void flush_user_dcache_page(unsigned long);
  30 void flush_user_icache_page(unsigned long);
  31 void flush_user_dcache_range(unsigned long, unsigned long);
  32 void flush_user_icache_range(unsigned long, unsigned long);
  33
  34 /* Cache flush operations */
  35
  36 void flush_cache_all_local(void);
  37 void flush_cache_all(void);
  38 void flush_cache_mm(struct mm_struct *mm);
  39
  40 #define flush_kernel_dcache_range(start,size) \
  41         flush_kernel_dcache_range_asm((start), (start)+(size));
  42 /* vmap range flushes and invalidates.  Architecturally, we don't need
  43  * the invalidate, because the CPU should refuse to speculate once an
  44  * area has been flushed, so invalidate is left empty */
  45 static inline void flush_kernel_vmap_range(void *vaddr, int size)
  46 {
  47         unsigned long start = (unsigned long)vaddr;
  48
  49         flush_kernel_dcache_range_asm(start, start + size);
  50 }
  51 static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
  52 {
  53 }
  54
  55 #define flush_cache_vmap(start, end)            flush_cache_all()
  56 #define flush_cache_vunmap(start, end)          flush_cache_all()
  57
  58 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  59 extern void flush_dcache_page(struct page *page);
  60
  61 #define flush_dcache_mmap_lock(mapping) \
  62         spin_lock_irq(&(mapping)->tree_lock)
  63 #define flush_dcache_mmap_unlock(mapping) \
  64         spin_unlock_irq(&(mapping)->tree_lock)
  65
  66 #define flush_icache_page(vma,page)     do {            \
  67         flush_kernel_dcache_page(page);                 \
  68         flush_kernel_icache_page(page_address(page));   \
  69 } while (0)
  70
  71 #define flush_icache_range(s,e)         do {            \
  72         flush_kernel_dcache_range_asm(s,e);             \
  73         flush_kernel_icache_range_asm(s,e);             \
  74 } while (0)
  75
  76 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  77 do { \
  78         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
  79         memcpy(dst, src, len); \
  80         flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
  81 } while (0)
  82
  83 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  84 do { \
  85         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
  86         memcpy(dst, src, len); \
  87 } while (0)
  88
  89 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
  90 void flush_cache_range(struct vm_area_struct *vma,
  91                 unsigned long start, unsigned long end);
  92
  93 #define ARCH_HAS_FLUSH_ANON_PAGE
  94 static inline void
  95 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
  96 {
  97         if (PageAnon(page))
  98                 flush_user_dcache_page(vmaddr);
  99 }
 100
 101 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
 102 void flush_kernel_dcache_page_addr(void *addr);
 103 static inline void flush_kernel_dcache_page(struct page *page)
 104 {
 105         flush_kernel_dcache_page_addr(page_address(page));
 106 }
 107
 108 #ifdef CONFIG_DEBUG_RODATA
 109 void mark_rodata_ro(void);
 110 #endif
 111
 112 #ifdef CONFIG_PA8X00
 113 /* Only pa8800, pa8900 needs this */
 114
 115 #include <asm/kmap_types.h>
 116
 117 #define ARCH_HAS_KMAP
 118
 119 void kunmap_parisc(void *addr);
 120
 121 static inline void *kmap(struct page *page)
 122 {
 123         might_sleep();
 124         return page_address(page);
 125 }
 126
 127 #define kunmap(page)                    kunmap_parisc(page_address(page))
 128
 129 static inline void *kmap_atomic(struct page *page, enum km_type idx)
 130 {
 131         pagefault_disable();
 132         return page_address(page);
 133 }
 134
 135 static inline void kunmap_atomic_notypecheck(void *addr, enum km_type idx)
 136 {
 137         kunmap_parisc(addr);
 138         pagefault_enable();
 139 }
 140
 141 #define kmap_atomic_prot(page, idx, prot)       kmap_atomic(page, idx)
 142 #define kmap_atomic_pfn(pfn, idx)       kmap_atomic(pfn_to_page(pfn), (idx))
 143 #define kmap_atomic_to_page(ptr)        virt_to_page(ptr)
 144 #endif
 145
 146 #endif /* _PARISC_CACHEFLUSH_H */