common/cmd_cache.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   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 /*
  25  * Cache support: switch on or off, get status
  26  */
  27 #include <common.h>
  28 #include <command.h>
  29
  30 static int on_off (const char *);
  31
  32 int do_icache ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  33 {
  34         switch (argc) {
  35         case 2:                 /* on / off     */
  36                 switch (on_off(argv[1])) {
  37                 case 0: icache_disable();
  38                         break;
  39                 case 1: icache_enable ();
  40                         break;
  41                 }
  42                 /* FALL TROUGH */
  43         case 1:                 /* get status */
  44                 printf ("Instruction Cache is %s\n",
  45                         icache_status() ? "ON" : "OFF");
  46                 return 0;
  47         default:
  48                 return cmd_usage(cmdtp);
  49         }
  50         return 0;
  51 }
  52
  53 int do_dcache ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  54 {
  55         switch (argc) {
  56         case 2:                 /* on / off     */
  57                 switch (on_off(argv[1])) {
  58                 case 0: dcache_disable();
  59                         break;
  60                 case 1: dcache_enable ();
  61                         break;
  62                 }
  63                 /* FALL TROUGH */
  64         case 1:                 /* get status */
  65                 printf ("Data (writethrough) Cache is %s\n",
  66                         dcache_status() ? "ON" : "OFF");
  67                 return 0;
  68         default:
  69                 return cmd_usage(cmdtp);
  70         }
  71         return 0;
  72
  73 }
  74
  75 static int on_off (const char *s)
  76 {
  77         if (strcmp(s, "on") == 0) {
  78                 return (1);
  79         } else if (strcmp(s, "off") == 0) {
  80                 return (0);
  81         }
  82         return (-1);
  83 }
  84
  85
  86 U_BOOT_CMD(
  87         icache,   2,   1,     do_icache,
  88         "enable or disable instruction cache",
  89         "[on, off]\n"
  90         "    - enable or disable instruction cache"
  91 );
  92
  93 U_BOOT_CMD(
  94         dcache,   2,   1,     do_dcache,
  95         "enable or disable data cache",
  96         "[on, off]\n"
  97         "    - enable or disable data (writethrough) cache"
  98 );