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 flush_kernel_dcache_page_asm(void *);
  29 void flush_kernel_icache_page(void *);
  30 void flush_user_dcache_range(unsigned long, unsigned long);
  31 void flush_user_icache_range(unsigned long, unsigned long);
  32
  33 /* Cache flush operations */
  34
  35 void flush_cache_all_local(void);
  36 void flush_cache_all(void);
  37 void flush_cache_mm(struct mm_struct *mm);
  38
  39 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
  40 void flush_kernel_dcache_page_addr(void *addr);
  41 static inline void flush_kernel_dcache_page(struct page *page)
  42 {
  43         flush_kernel_dcache_page_addr(page_address(page));
  44 }
  45
  46 #define flush_kernel_dcache_range(start,size) \
  47         flush_kernel_dcache_range_asm((start), (start)+(size));
  48 /* vmap range flushes and invalidates.  Architecturally, we don't need
  49  * the invalidate, because the CPU should refuse to speculate once an
  50  * area has been flushed, so invalidate is left empty */
  51 static inline void flush_kernel_vmap_range(void *vaddr, int size)
  52 {
  53         unsigned long start = (unsigned long)vaddr;
  54
  55         flush_kernel_dcache_range_asm(start, start + size);
  56 }
  57 static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
  58 {
  59         unsigned long start = (unsigned long)vaddr;
  60         void *cursor = vaddr;
  61
  62         for ( ; cursor < vaddr + size; cursor += PAGE_SIZE) {
  63                 struct page *page = vmalloc_to_page(cursor);
  64
  65                 if (test_and_clear_bit(PG_dcache_dirty, &page->flags))
  66                         flush_kernel_dcache_page(page);
  67         }
  68         flush_kernel_dcache_range_asm(start, start + size);
  69 }
  70
  71 #define flush_cache_vmap(start, end)            flush_cache_all()
  72 #define flush_cache_vunmap(start, end)          flush_cache_all()
  73
  74 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
  75 extern void flush_dcache_page(struct page *page);
  76
  77 #define flush_dcache_mmap_lock(mapping) \
  78         spin_lock_irq(&(mapping)->tree_lock)
  79 #define flush_dcache_mmap_unlock(mapping) \
  80         spin_unlock_irq(&(mapping)->tree_lock)
  81
  82 #define flush_icache_page(vma,page)     do {            \
  83         flush_kernel_dcache_page(page);                 \
  84         flush_kernel_icache_page(page_address(page));   \
  85 } while (0)
  86
  87 #define flush_icache_range(s,e)         do {            \
  88         flush_kernel_dcache_range_asm(s,e);             \
  89         flush_kernel_icache_range_asm(s,e);             \
  90 } while (0)
  91
  92 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  93 do { \
  94         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
  95         memcpy(dst, src, len); \
  96         flush_kernel_dcache_range_asm((unsigned long)dst, (unsigned long)dst + len); \
  97 } while (0)
  98
  99 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
 100 do { \
 101         flush_cache_page(vma, vaddr, page_to_pfn(page)); \
 102         memcpy(dst, src, len); \
 103 } while (0)
 104
 105 void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn);
 106 void flush_cache_range(struct vm_area_struct *vma,
 107                 unsigned long start, unsigned long end);
 108
 109 /* defined in pacache.S exported in cache.c used by flush_anon_page */
 110 void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
 111
 112 #define ARCH_HAS_FLUSH_ANON_PAGE
 113 static inline void
 114 flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
 115 {
 116         if (PageAnon(page)) {
 117                 flush_tlb_page(vma, vmaddr);
 118                 preempt_disable();
 119                 flush_dcache_page_asm(page_to_phys(page), vmaddr);
 120                 preempt_enable();
 121         }
 122 }
 123
 124 #ifdef CONFIG_DEBUG_RODATA
 125 void mark_rodata_ro(void);
 126 #endif
 127
 128 #include <asm/kmap_types.h>
 129
 130 #define ARCH_HAS_KMAP
 131
 132 static inline void *kmap(struct page *page)
 133 {
 134         might_sleep();
 135         return page_address(page);
 136 }
 137
 138 static inline void kunmap(struct page *page)
 139 {
 140         flush_kernel_dcache_page_addr(page_address(page));
 141 }
 142
 143 static inline void *kmap_atomic(struct page *page)
 144 {
 145         preempt_disable();
 146         pagefault_disable();
 147         return page_address(page);
 148 }
 149
 150 static inline void __kunmap_atomic(void *addr)
 151 {
 152         flush_kernel_dcache_page_addr(addr);
 153         pagefault_enable();
 154         preempt_enable();
 155 }
 156
 157 #define kmap_atomic_prot(page, prot)    kmap_atomic(page)
 158 #define kmap_atomic_pfn(pfn)    kmap_atomic(pfn_to_page(pfn))
 159 #define kmap_atomic_to_page(ptr)        virt_to_page(ptr)
 160
 161 #endif /* _PARISC_CACHEFLUSH_H */
 162