include/asm-blackfin/cacheflush.h

   1 /*
   2  * File:         include/asm-blackfin/cacheflush.h
   3  * Based on:     include/asm-m68knommu/cacheflush.h
   4  * Author:       LG Soft India
   5  *               Copyright (C) 2004 Analog Devices Inc.
   6  * Created:      Tue Sep 21 2004
   7  * Description:  Blackfin low-level cache routines adapted from the i386
   8  *               and PPC versions by Greg Ungerer (gerg@snapgear.com)
   9  *
  10  * Modified:
  11  *
  12  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; see the file COPYING.
  26  * If not, write to the Free Software Foundation,
  27  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  28  */
  29
  30 #ifndef _BLACKFIN_CACHEFLUSH_H
  31 #define _BLACKFIN_CACHEFLUSH_H
  32
  33 #include <asm/cplb.h>
  34
  35 extern void blackfin_icache_dcache_flush_range(unsigned int, unsigned int);
  36 extern void blackfin_icache_flush_range(unsigned int, unsigned int);
  37 extern void blackfin_dcache_flush_range(unsigned int, unsigned int);
  38 extern void blackfin_dcache_invalidate_range(unsigned int, unsigned int);
  39 extern void blackfin_dflush_page(void *);
  40
  41 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  42 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  43 #define flush_cache_mm(mm)                      do { } while (0)
  44 #define flush_cache_range(vma, start, end)      do { } while (0)
  45 #define flush_cache_page(vma, vmaddr)           do { } while (0)
  46 #define flush_cache_vmap(start, end)            do { } while (0)
  47 #define flush_cache_vunmap(start, end)          do { } while (0)
  48
  49 static inline void flush_icache_range(unsigned start, unsigned end)
  50 {
  51 #if defined(CONFIG_BFIN_DCACHE) && defined(CONFIG_BFIN_ICACHE)
  52
  53 # if defined(CONFIG_BFIN_WT)
  54         blackfin_icache_flush_range((start), (end));
  55 # else
  56         blackfin_icache_dcache_flush_range((start), (end));
  57 # endif
  58
  59 #else
  60
  61 # if defined(CONFIG_BFIN_ICACHE)
  62         blackfin_icache_flush_range((start), (end));
  63 # endif
  64 # if defined(CONFIG_BFIN_DCACHE)
  65         blackfin_dcache_flush_range((start), (end));
  66 # endif
  67
  68 #endif
  69 }
  70
  71 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  72 do { memcpy(dst, src, len); \
  73      flush_icache_range ((unsigned) (dst), (unsigned) (dst) + (len)); \
  74 } while (0)
  75 #define copy_from_user_page(vma, page, vaddr, dst, src, len)    memcpy(dst, src, len)
  76
  77 #if defined(CONFIG_BFIN_DCACHE)
  78 # define invalidate_dcache_range(start,end)     blackfin_dcache_invalidate_range((start), (end))
  79 #else
  80 # define invalidate_dcache_range(start,end)     do { } while (0)
  81 #endif
  82 #if defined(CONFIG_BFIN_DCACHE) && defined(CONFIG_BFIN_WB)
  83 # define flush_dcache_range(start,end)          blackfin_dcache_flush_range((start), (end))
  84 # define flush_dcache_page(page)                        blackfin_dflush_page(page_address(page))
  85 #else
  86 # define flush_dcache_range(start,end)          do { } while (0)
  87 # define flush_dcache_page(page)                        do { } while (0)
  88 #endif
  89
  90 #endif                          /* _BLACKFIN_ICACHEFLUSH_H */