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
  37 int checkcpu(void)
  38 {
  39 #if defined(CONFIG_SH2A)
  40         puts("CPU: SH2A\n");
  41 #else
  42         puts("CPU: SH2\n");
  43 #endif
  44         return 0;
  45 }
  46
  47 int cpu_init(void)
  48 {
  49         /* SCIF enable */
  50         scif0_enable();
  51         /* CMT clock enable */
  52         cmt_clock_enable() ;
  53         return 0;
  54 }
  55
  56 int cleanup_before_linux(void)
  57 {
  58         disable_interrupts();
  59         return 0;
  60 }
  61
  62 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  63 {
  64         disable_interrupts();
  65         reset_cpu(0);
  66         return 0;
  67 }
  68
  69 void flush_cache(unsigned long addr, unsigned long size)
  70 {
  71
  72 }
  73
  74 void icache_enable(void)
  75 {
  76 }
  77
  78 void icache_disable(void)
  79 {
  80 }
  81
  82 int icache_status(void)
  83 {
  84         return 0;
  85 }
  86
  87 void dcache_enable(void)
  88 {
  89 }
  90
  91 void dcache_disable(void)
  92 {
  93 }
  94
  95 int dcache_status(void)
  96 {
  97         return 0;
  98 }