LXR uboot/arch/arm/cpu/s3c44b0/cache.c

   1/*
   2 * (C) Copyright 2004
   3 * DAVE Srl
   4 * http://www.dave-tech.it
   5 * http://www.wawnet.biz
   6 * mailto:info@wawnet.biz
   7 *
   8 * See file CREDITS for list of people who contributed to this
   9 * project.
  10 *
  11 * This program is free software; you can redistribute it and/or
  12 * modify it under the terms of the GNU General Public License as
  13 * published by the Free Software Foundation; either version 2 of
  14 * the License, or (at your option) any later version.
  15 *
  16 * This program is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 * GNU General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24 * MA 02111-1307 USA
  25 */
  26
  27#include <common.h>
  28#include <command.h>
  29#include <asm/hardware.h>
  30
  31static void s3c44b0_flush_cache(void)
  32{
  33        volatile int i;
  34        /* flush cycle */
  35        for(i=0x10002000;i<0x10004800;i+=16)
  36        {
  37                *((int *)i)=0x0;
  38        }
  39}
  40
  41void icache_enable (void)
  42{
  43        ulong reg;
  44
  45        s3c44b0_flush_cache();
  46
  47        /*
  48                Init cache
  49                Non-cacheable area (everything outside RAM)
  50                0x0000:0000 - 0x0C00:0000
  51         */
  52        NCACHBE0 = 0xC0000000;
  53        NCACHBE1 = 0x00000000;
  54
  55        /*
  56                Enable chache
  57        */
  58        reg = SYSCFG;
  59        reg |= 0x00000006; /* 8kB */
  60        SYSCFG = reg;
  61}
  62
  63void icache_disable (void)
  64{
  65        ulong reg;
  66
  67        reg = SYSCFG;
  68        reg &= ~0x00000006; /* 8kB */
  69        SYSCFG = reg;
  70}
  71
  72int icache_status (void)
  73{
  74        return 0;
  75}
  76
  77void dcache_enable (void)
  78{
  79        icache_enable();
  80}
  81
  82void dcache_disable (void)
  83{
  84        icache_disable();
  85}
  86
  87int dcache_status (void)
  88{
  89        return dcache_status();
  90}
  91