LXR uboot/arch/sh/cpu/sh2/cpu.c

   1/*
   2 * Copyright (C) 2007,2008 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
   3 * Copyright (C) 2008 Renesas Solutions Corp.
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24#include <common.h>
  25#include <command.h>
  26#include <asm/processor.h>
  27#include <asm/io.h>
  28
  29#define STBCR4      0xFFFE040C
  30#define cmt_clock_enable() do {\
  31                writeb(readb(STBCR4) & ~0x04, STBCR4);\
  32        } while (0)
  33#define scif0_enable() do {\
  34                writeb(readb(STBCR4) & ~0x80, STBCR4);\
  35        } while (0)
  36#define scif3_enable() do {\
  37                writeb(readb(STBCR4) & ~0x10, STBCR4);\
  38        } while (0)
  39
  40int checkcpu(void)
  41{
  42#if defined(CONFIG_SH2A)
  43        puts("CPU: SH2A\n");
  44#else
  45        puts("CPU: SH2\n");
  46#endif
  47        return 0;
  48}
  49
  50int cpu_init(void)
  51{
  52        /* SCIF enable */
  53#if defined(CONFIG_CONS_SCIF3)
  54        scif3_enable();
  55#else
  56        scif0_enable();
  57#endif
  58        /* CMT clock enable */
  59        cmt_clock_enable() ;
  60        return 0;
  61}
  62
  63int cleanup_before_linux(void)
  64{
  65        disable_interrupts();
  66        return 0;
  67}
  68
  69int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  70{
  71        disable_interrupts();
  72        reset_cpu(0);
  73        return 0;
  74}
  75
  76void flush_cache(unsigned long addr, unsigned long size)
  77{
  78
  79}
  80
  81void icache_enable(void)
  82{
  83}
  84
  85void icache_disable(void)
  86{
  87}
  88
  89int icache_status(void)
  90{
  91        return 0;
  92}
  93
  94void dcache_enable(void)
  95{
  96}
  97
  98void dcache_disable(void)
  99{
 100}
 101
 102int dcache_status(void)
 103{
 104        return 0;
 105}
 106