include/asm-sparc64/cacheflush.h

   1 #ifndef _SPARC64_CACHEFLUSH_H
   2 #define _SPARC64_CACHEFLUSH_H
   3
   4 #include <linux/config.h>
   5 #include <asm/page.h>
   6
   7 /* Flushing for D-cache alias handling is only needed if
   8  * the page size is smaller than 16K.
   9  */
  10 #if PAGE_SHIFT < 14
  11 #define DCACHE_ALIASING_POSSIBLE
  12 #endif
  13
  14 #ifndef __ASSEMBLY__
  15
  16 #include <linux/mm.h>
  17
  18 /* Cache flush operations. */
  19
  20 /* These are the same regardless of whether this is an SMP kernel or not. */
  21 #define flush_cache_mm(__mm) \
  22         do { if ((__mm) == current->mm) flushw_user(); } while(0)
  23 #define flush_cache_range(vma, start, end) \
  24         flush_cache_mm((vma)->vm_mm)
  25 #define flush_cache_page(vma, page, pfn) \
  26         flush_cache_mm((vma)->vm_mm)
  27
  28 /*
  29  * On spitfire, the icache doesn't snoop local stores and we don't
  30  * use block commit stores (which invalidate icache lines) during
  31  * module load, so we need this.
  32  */
  33 extern void flush_icache_range(unsigned long start, unsigned long end);
  34 extern void __flush_icache_page(unsigned long);
  35
  36 extern void __flush_dcache_page(void *addr, int flush_icache);
  37 extern void flush_dcache_page_impl(struct page *page);
  38 #ifdef CONFIG_SMP
  39 extern void smp_flush_dcache_page_impl(struct page *page, int cpu);
  40 extern void flush_dcache_page_all(struct mm_struct *mm, struct page *page);
  41 #else
  42 #define smp_flush_dcache_page_impl(page,cpu) flush_dcache_page_impl(page)
  43 #define flush_dcache_page_all(mm,page) flush_dcache_page_impl(page)
  44 #endif
  45
  46 extern void __flush_dcache_range(unsigned long start, unsigned long end);
  47 extern void flush_dcache_page(struct page *page);
  48
  49 #define flush_icache_page(vma, pg)      do { } while(0)
  50 #define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
  51
  52 extern void flush_ptrace_access(struct vm_area_struct *, struct page *,
  53                                 unsigned long uaddr, void *kaddr,
  54                                 unsigned long len, int write);
  55
  56 #define copy_to_user_page(vma, page, vaddr, dst, src, len)              \
  57         do {                                                            \
  58                 flush_cache_page(vma, vaddr, page_to_pfn(page));        \
  59                 memcpy(dst, src, len);                                  \
  60                 flush_ptrace_access(vma, page, vaddr, src, len, 0);     \
  61         } while (0)
  62
  63 #define copy_from_user_page(vma, page, vaddr, dst, src, len)            \
  64         do {                                                            \
  65                 flush_cache_page(vma, vaddr, page_to_pfn(page));        \
  66                 memcpy(dst, src, len);                                  \
  67                 flush_ptrace_access(vma, page, vaddr, dst, len, 1);     \
  68         } while (0)
  69
  70 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  71 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  72
  73 #define flush_cache_vmap(start, end)            do { } while (0)
  74 #define flush_cache_vunmap(start, end)          do { } while (0)
  75
  76 #endif /* !__ASSEMBLY__ */
  77
  78 #endif /* _SPARC64_CACHEFLUSH_H */