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 ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
  39 void flush_kernel_dcache_page_addr(void *addr);
  40 static inline void flush_kernel_dcache_page(struct page *page)
  41 {
  42         flush_kernel_dcache_page_addr(page_address(page));
  43 }
  44
  45 #define flush_kernel_dcache_range(start,size) \
  46         flush_kernel_dcache_range_asm((start), (start)+(size));
  47 /* vmap range flushes and invalidates.  Architecturally, we don't need
  48  * the invalidate, because the CPU should refuse to speculate once an
  49  * area has been flushed, so invalidate is left empty */
  50 static inline void flush_kernel_vmap_range(void *vaddr, int size)
  51 {
  52         unsigned long start = (unsigned long)vaddr;
  53
  54         flush_kernel_dcache_range_asm(start, start + size);
  55 }
  56 static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
  57 {
  58         unsigned long start = (unsigned long)vaddr;
  59         void *cursor = vaddr;
  60
  61         for ( ; cursor < vaddr + size; cursor += PAGE_SIZE) {
  62                 struct page *page = vmalloc_to_page(cursor);
  63
  64                 if (test_and_clear_bit(PG_dcache_dirty, &page->flags))
  65                         flush_kernel_dcache_page(page);
  66         }
  67         flush_kernel_dcache_range_asm(start, start + size);
  68 }
  69
  70 #define flush_cache_vmap(start, end)            flush_cache_all()
  71 #define flush_cache_vunmap(start, end)          flush_cache_all()
  72
  73 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  74 extern void flush_dcache_page(struct page *page);
  75
  76 #define flush_dcache_mmap_lock(mapping) \
  77         spin_lock_irq(&(mapping)->tree_lock)
  78 #define flush_dcache_mmap_unlock(mapping) \
  79         spin_unlock_irq(&(mapping)->tree_lock)
  80
  81 #define flush_icache_page(vma,page)     do {            \
  82         flush_kernel_dcache_page(page);                 \
  83         flush_kernel_icache_page(page_address(page));   \
  84 } while (0)
  85
  86 #define flush_icache_range(s,e)         do {            \
  87         flush_kernel_dcache_range_asm(s,e);             \
  88         flush_kernel_icache_range_asm(s,e);             \
  89 } while (0)
  90
  91 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  92 do { \
  93         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
  94         memcpy(dst, src, len); \
  95         flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
  96 } while (0)
  97
  98 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  99 do { \
 100         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
 101         memcpy(dst, src, len); \
 102 } while (0)
 103
 104 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
 105 void flush_cache_range(struct vm_area_struct *vma,
 106                 unsigned long start, unsigned long end);
 107
 108 /* defined in pacache.S exported in cache.c used by flush_anon_page */
 109 void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
 110
 111 #define ARCH_HAS_FLUSH_ANON_PAGE
 112 static inline void
 113 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
 114 {
 115         if (PageAnon(page))
 116                 flush_dcache_page_asm(page_to_phys(page), vmaddr);
 117 }
 118
 119 #ifdef CONFIG_DEBUG_RODATA
 120 void mark_rodata_ro(void);
 121 #endif
 122
 123 #ifdef CONFIG_PA8X00
 124 /* Only pa8800, pa8900 needs this */
 125
 126 #include <asm/kmap_types.h>
 127
 128 #define ARCH_HAS_KMAP
 129
 130 void kunmap_parisc(void *addr);
 131
 132 static inline void *kmap(struct page *page)
 133 {
 134         might_sleep();
 135         return page_address(page);
 136 }
 137
 138 #define kunmap(page)                    kunmap_parisc(page_address(page))
 139
 140 static inline void *__kmap_atomic(struct page *page)
 141 {
 142         pagefault_disable();
 143         return page_address(page);
 144 }
 145
 146 static inline void __kunmap_atomic(void *addr)
 147 {
 148         kunmap_parisc(addr);
 149         pagefault_enable();
 150 }
 151
 152 #define kmap_atomic_prot(page, prot)    kmap_atomic(page)
 153 #define kmap_atomic_pfn(pfn)    kmap_atomic(pfn_to_page(pfn))
 154 #define kmap_atomic_to_page(ptr)        virt_to_page(ptr)
 155 #endif
 156
 157 #endif /* _PARISC_CACHEFLUSH_H */
 158