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_range(unsigned long, unsigned long);
  30 void flush_user_icache_range(unsigned long, unsigned long);
  31
  32 /* Cache flush operations */
  33
  34 void flush_cache_all_local(void);
  35 void flush_cache_all(void);
  36 void flush_cache_mm(struct mm_struct *mm);
  37
  38 #define flush_kernel_dcache_range(start,size) \
  39         flush_kernel_dcache_range_asm((start), (start)+(size));
  40 /* vmap range flushes and invalidates.  Architecturally, we don't need
  41  * the invalidate, because the CPU should refuse to speculate once an
  42  * area has been flushed, so invalidate is left empty */
  43 static inline void flush_kernel_vmap_range(void *vaddr, int size)
  44 {
  45         unsigned long start = (unsigned long)vaddr;
  46
  47         flush_kernel_dcache_range_asm(start, start + size);
  48 }
  49 static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
  50 {
  51 }
  52
  53 #define flush_cache_vmap(start, end)            flush_cache_all()
  54 #define flush_cache_vunmap(start, end)          flush_cache_all()
  55
  56 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  57 extern void flush_dcache_page(struct page *page);
  58
  59 #define flush_dcache_mmap_lock(mapping) \
  60         spin_lock_irq(&(mapping)->tree_lock)
  61 #define flush_dcache_mmap_unlock(mapping) \
  62         spin_unlock_irq(&(mapping)->tree_lock)
  63
  64 #define flush_icache_page(vma,page)     do {            \
  65         flush_kernel_dcache_page(page);                 \
  66         flush_kernel_icache_page(page_address(page));   \
  67 } while (0)
  68
  69 #define flush_icache_range(s,e)         do {            \
  70         flush_kernel_dcache_range_asm(s,e);             \
  71         flush_kernel_icache_range_asm(s,e);             \
  72 } while (0)
  73
  74 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  75 do { \
  76         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
  77         memcpy(dst, src, len); \
  78         flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
  79 } while (0)
  80
  81 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  82 do { \
  83         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
  84         memcpy(dst, src, len); \
  85 } while (0)
  86
  87 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
  88 void flush_cache_range(struct vm_area_struct *vma,
  89                 unsigned long start, unsigned long end);
  90
  91 /* defined in pacache.S exported in cache.c used by flush_anon_page */
  92 void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
  93
  94 #define ARCH_HAS_FLUSH_ANON_PAGE
  95 static inline void
  96 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
  97 {
  98         if (PageAnon(page))
  99                 flush_dcache_page_asm(page_to_phys(page), vmaddr);
 100 }
 101
 102 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
 103 void flush_kernel_dcache_page_addr(void *addr);
 104 static inline void flush_kernel_dcache_page(struct page *page)
 105 {
 106         flush_kernel_dcache_page_addr(page_address(page));
 107 }
 108
 109 #ifdef CONFIG_DEBUG_RODATA
 110 void mark_rodata_ro(void);
 111 #endif
 112
 113 #ifdef CONFIG_PA8X00
 114 /* Only pa8800, pa8900 needs this */
 115
 116 #include <asm/kmap_types.h>
 117
 118 #define ARCH_HAS_KMAP
 119
 120 void kunmap_parisc(void *addr);
 121
 122 static inline void *kmap(struct page *page)
 123 {
 124         might_sleep();
 125         return page_address(page);
 126 }
 127
 128 #define kunmap(page)                    kunmap_parisc(page_address(page))
 129
 130 static inline void *__kmap_atomic(struct page *page)
 131 {
 132         pagefault_disable();
 133         return page_address(page);
 134 }
 135
 136 static inline void __kunmap_atomic(void *addr)
 137 {
 138         kunmap_parisc(addr);
 139         pagefault_enable();
 140 }
 141
 142 #define kmap_atomic_prot(page, prot)    kmap_atomic(page)
 143 #define kmap_atomic_pfn(pfn)    kmap_atomic(pfn_to_page(pfn))
 144 #define kmap_atomic_to_page(ptr)        virt_to_page(ptr)
 145 #endif
 146
 147 #endif /* _PARISC_CACHEFLUSH_H */
 148