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 #include <asm/tlbflush.h>
   7
   8 /* The usual comment is "Caches aren't brain-dead on the <architecture>".
   9  * Unfortunately, that doesn't apply to PA-RISC. */
  10
  11 /* Internal implementation */
  12 void flush_data_cache_local(void *);  /* flushes local data-cache only */
  13 void flush_instruction_cache_local(void *); /* flushes local code-cache only */
  14 #ifdef CONFIG_SMP
  15 void flush_data_cache(void); /* flushes data-cache only (all processors) */
  16 void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
  17 #else
  18 #define flush_data_cache() flush_data_cache_local(NULL)
  19 #define flush_instruction_cache() flush_instruction_cache_local(NULL)
  20 #endif
  21
  22 #define flush_cache_dup_mm(mm) flush_cache_mm(mm)
  23
  24 void flush_user_icache_range_asm(unsigned long, unsigned long);
  25 void flush_kernel_icache_range_asm(unsigned long, unsigned long);
  26 void flush_user_dcache_range_asm(unsigned long, unsigned long);
  27 void flush_kernel_dcache_range_asm(unsigned long, unsigned long);
  28 void purge_kernel_dcache_range_asm(unsigned long, unsigned long);
  29 void flush_kernel_dcache_page_asm(void *);
  30 void flush_kernel_icache_page(void *);
  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 ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
  41 void flush_kernel_dcache_page_addr(void *addr);
  42 static inline void flush_kernel_dcache_page(struct page *page)
  43 {
  44         flush_kernel_dcache_page_addr(page_address(page));
  45 }
  46
  47 #define flush_kernel_dcache_range(start,size) \
  48         flush_kernel_dcache_range_asm((start), (start)+(size));
  49
  50 void flush_kernel_vmap_range(void *vaddr, int size);
  51 void invalidate_kernel_vmap_range(void *vaddr, int size);
  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_tlb_page(vma, vmaddr);
 100                 preempt_disable();
 101                 flush_dcache_page_asm(page_to_phys(page), vmaddr);
 102                 preempt_enable();
 103         }
 104 }
 105
 106 #include <asm/kmap_types.h>
 107
 108 #define ARCH_HAS_KMAP
 109
 110 static inline void *kmap(struct page *page)
 111 {
 112         might_sleep();
 113         return page_address(page);
 114 }
 115
 116 static inline void kunmap(struct page *page)
 117 {
 118         flush_kernel_dcache_page_addr(page_address(page));
 119 }
 120
 121 static inline void *kmap_atomic(struct page *page)
 122 {
 123         preempt_disable();
 124         pagefault_disable();
 125         return page_address(page);
 126 }
 127
 128 static inline void __kunmap_atomic(void *addr)
 129 {
 130         flush_kernel_dcache_page_addr(addr);
 131         pagefault_enable();
 132         preempt_enable();
 133 }
 134
 135 #define kmap_atomic_prot(page, prot)    kmap_atomic(page)
 136 #define kmap_atomic_pfn(pfn)    kmap_atomic(pfn_to_page(pfn))
 137
 138 #endif /* _PARISC_CACHEFLUSH_H */
 139