LXR uboot/arch/arm/cpu/s3c44b0/cpu.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/*
  28 * S3C44B0 CPU specific code
  29 */
  30
  31#include <common.h>
  32#include <command.h>
  33#include <asm/hardware.h>
  34
  35int arch_cpu_init (void)
  36{
  37        icache_enable();
  38
  39        return 0;
  40}
  41
  42int cleanup_before_linux (void)
  43{
  44        /*
  45                cache memory should be enabled before calling
  46                Linux to make the kernel uncompression faster
  47        */
  48        icache_enable();
  49
  50        disable_interrupts ();
  51
  52        return 0;
  53}
  54
  55void reset_cpu (ulong addr)
  56{
  57        /*
  58                reset the cpu using watchdog
  59        */
  60
  61        /* Disable the watchdog.*/
  62        WTCON&=~(1<<5);
  63
  64        /* set the timeout value to a short time... */
  65        WTCNT = 0x1;
  66
  67        /* Enable the watchdog. */
  68        WTCON|=1;
  69        WTCON|=(1<<5);
  70
  71        while(1) {
  72                /*NOP*/
  73        }
  74}
  75