include/asm-sh/cpu-sh4/cacheflush.h

   1 /*
   2  * include/asm-sh/cpu-sh4/cacheflush.h
   3  *
   4  * Copyright (C) 1999 Niibe Yutaka
   5  * Copyright (C) 2003 Paul Mundt
   6  *
   7  * This file is subject to the terms and conditions of the GNU General Public
   8  * License.  See the file "COPYING" in the main directory of this archive
   9  * for more details.
  10  */
  11 #ifndef __ASM_CPU_SH4_CACHEFLUSH_H
  12 #define __ASM_CPU_SH4_CACHEFLUSH_H
  13
  14 /*
  15  *  Caches are broken on SH-4 (unless we use write-through
  16  *  caching; in which case they're only semi-broken),
  17  *  so we need them.
  18  */
  19
  20 /* Page is 4K, OC size is 16K, there are four lines. */
  21 #define CACHE_ALIAS 0x00003000
  22
  23 struct page;
  24 struct mm_struct;
  25 struct vm_area_struct;
  26
  27 extern void flush_cache_all(void);
  28 extern void flush_cache_mm(struct mm_struct *mm);
  29 extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
  30                               unsigned long end);
  31 extern void flush_cache_page(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn);
  32 extern void flush_dcache_page(struct page *pg);
  33
  34 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  35 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  36
  37 extern void flush_icache_range(unsigned long start, unsigned long end);
  38 extern void flush_cache_sigtramp(unsigned long addr);
  39 extern void flush_icache_user_range(struct vm_area_struct *vma,
  40                                     struct page *page, unsigned long addr,
  41                                     int len);
  42
  43 #define flush_icache_page(vma,pg)               do { } while (0)
  44
  45 /* Initialization of P3 area for copy_user_page */
  46 extern void p3_cache_init(void);
  47
  48 #define PG_mapped       PG_arch_1
  49
  50 /* We provide our own get_unmapped_area to avoid cache alias issue */
  51 #define HAVE_ARCH_UNMAPPED_AREA
  52
  53 #ifdef CONFIG_MMU
  54 extern int remap_area_pages(unsigned long addr, unsigned long phys_addr,
  55                             unsigned long size, unsigned long flags);
  56 #else /* CONFIG_MMU */
  57 static inline int remap_area_pages(unsigned long addr, unsigned long phys_addr,
  58                                    unsigned long size, unsigned long flags)
  59 {
  60         return 0;
  61 }
  62 #endif /* CONFIG_MMU */
  63 #endif /* __ASM_CPU_SH4_CACHEFLUSH_H */
  64