LXR linux/arch/microblaze/include/asm/cacheflush.h

   1/*
   2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
   3 * Copyright (C) 2007-2009 PetaLogix
   4 * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
   5 * based on v850 version which was
   6 * Copyright (C) 2001,02,03 NEC Electronics Corporation
   7 * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
   8 *
   9 * This file is subject to the terms and conditions of the GNU General
  10 * Public License. See the file COPYING in the main directory of this
  11 * archive for more details.
  12 *
  13 */
  14
  15#ifndef _ASM_MICROBLAZE_CACHEFLUSH_H
  16#define _ASM_MICROBLAZE_CACHEFLUSH_H
  17
  18/* Somebody depends on this; sigh... */
  19#include <linux/mm.h>
  20
  21/*
  22 * Cache handling functions.
  23 * Microblaze has a write-through data cache, meaning that the data cache
  24 * never needs to be flushed.  The only flushing operations that are
  25 * implemented are to invalidate the instruction cache.  These are called
  26 * after loading a user application into memory, we must invalidate the
  27 * instruction cache to make sure we don't fetch old, bad code.
  28 */
  29
  30/* FIXME for LL-temac driver */
  31#define invalidate_dcache_range(start, end) \
  32                        __invalidate_dcache_range(start, end)
  33
  34#define flush_cache_all()                       __invalidate_cache_all()
  35#define flush_cache_mm(mm)                      do { } while (0)
  36#define flush_cache_range(vma, start, end)      __invalidate_cache_all()
  37#define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
  38
  39#define flush_dcache_range(start, end)  __invalidate_dcache_range(start, end)
  40#define flush_dcache_page(page)                 do { } while (0)
  41#define flush_dcache_mmap_lock(mapping)         do { } while (0)
  42#define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  43
  44#define flush_icache_range(start, len)  __invalidate_icache_range(start, len)
  45#define flush_icache_page(vma, pg)              do { } while (0)
  46
  47#ifndef CONFIG_MMU
  48# define flush_icache_user_range(start, len)    do { } while (0)
  49#else
  50# define flush_icache_user_range(vma, pg, adr, len) __invalidate_icache_all()
  51
  52# define flush_page_to_ram(page)                do { } while (0)
  53
  54# define flush_icache()                 __invalidate_icache_all()
  55# define flush_cache_sigtramp(vaddr) \
  56                        __invalidate_icache_range(vaddr, vaddr + 8)
  57
  58# define flush_dcache_mmap_lock(mapping)        do { } while (0)
  59# define flush_dcache_mmap_unlock(mapping)      do { } while (0)
  60
  61# define flush_cache_dup_mm(mm)                 do { } while (0)
  62#endif
  63
  64#define flush_cache_vmap(start, end)            do { } while (0)
  65#define flush_cache_vunmap(start, end)          do { } while (0)
  66
  67struct page;
  68struct mm_struct;
  69struct vm_area_struct;
  70
  71/* see arch/microblaze/kernel/cache.c */
  72extern void __invalidate_icache_all(void);
  73extern void __invalidate_icache_range(unsigned long start, unsigned long end);
  74extern void __invalidate_icache_page(struct vm_area_struct *vma,
  75                                struct page *page);
  76extern void __invalidate_icache_user_range(struct vm_area_struct *vma,
  77                                struct page *page,
  78                                unsigned long adr, int len);
  79extern void __invalidate_cache_sigtramp(unsigned long addr);
  80
  81extern void __invalidate_dcache_all(void);
  82extern void __invalidate_dcache_range(unsigned long start, unsigned long end);
  83extern void __invalidate_dcache_page(struct vm_area_struct *vma,
  84                                struct page *page);
  85extern void __invalidate_dcache_user_range(struct vm_area_struct *vma,
  86                                struct page *page,
  87                                unsigned long adr, int len);
  88
  89extern inline void __invalidate_cache_all(void)
  90{
  91        __invalidate_icache_all();
  92        __invalidate_dcache_all();
  93}
  94
  95#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  96do { memcpy((dst), (src), (len)); \
  97        flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
  98} while (0)
  99
 100#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
 101        memcpy((dst), (src), (len))
 102
 103#endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */
 104