cpu/at32ap/cache.c

   1 /*
   2  * Copyright (C) 2004-2006 Atmel Corporation
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22
  23 #include <common.h>
  24
  25 #include <asm/cacheflush.h>
  26
  27 void dcache_clean_range(volatile void *start, size_t size)
  28 {
  29         unsigned long v, begin, end, linesz;
  30
  31         linesz = CONFIG_SYS_DCACHE_LINESZ;
  32
  33         /* You asked for it, you got it */
  34         begin = (unsigned long)start & ~(linesz - 1);
  35         end = ((unsigned long)start + size + linesz - 1) & ~(linesz - 1);
  36
  37         for (v = begin; v < end; v += linesz)
  38                 dcache_clean_line((void *)v);
  39
  40         sync_write_buffer();
  41 }
  42
  43 void dcache_invalidate_range(volatile void *start, size_t size)
  44 {
  45         unsigned long v, begin, end, linesz;
  46
  47         linesz = CONFIG_SYS_DCACHE_LINESZ;
  48
  49         /* You asked for it, you got it */
  50         begin = (unsigned long)start & ~(linesz - 1);
  51         end = ((unsigned long)start + size + linesz - 1) & ~(linesz - 1);
  52
  53         for (v = begin; v < end; v += linesz)
  54                 dcache_invalidate_line((void *)v);
  55 }
  56
  57 void dcache_flush_range(volatile void *start, size_t size)
  58 {
  59         unsigned long v, begin, end, linesz;
  60
  61         linesz = CONFIG_SYS_DCACHE_LINESZ;
  62
  63         /* You asked for it, you got it */
  64         begin = (unsigned long)start & ~(linesz - 1);
  65         end = ((unsigned long)start + size + linesz - 1) & ~(linesz - 1);
  66
  67         for (v = begin; v < end; v += linesz)
  68                 dcache_flush_line((void *)v);
  69
  70         sync_write_buffer();
  71 }
  72
  73 void icache_invalidate_range(volatile void *start, size_t size)
  74 {
  75         unsigned long v, begin, end, linesz;
  76
  77         linesz = CONFIG_SYS_ICACHE_LINESZ;
  78
  79         /* You asked for it, you got it */
  80         begin = (unsigned long)start & ~(linesz - 1);
  81         end = ((unsigned long)start + size + linesz - 1) & ~(linesz - 1);
  82
  83         for (v = begin; v < end; v += linesz)
  84                 icache_invalidate_line((void *)v);
  85 }
  86
  87 /*
  88  * This is called after loading something into memory.  We need to
  89  * make sure that everything that was loaded is actually written to
  90  * RAM, and that the icache will look for it. Cleaning the dcache and
  91  * invalidating the icache will do the trick.
  92  */
  93 void  flush_cache (unsigned long start_addr, unsigned long size)
  94 {
  95         dcache_clean_range((void *)start_addr, size);
  96         icache_invalidate_range((void *)start_addr, size);
  97 }