/* * (C) Copyright 2000 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ /* * Cache support: switch on or off, get status */ #include <common.h> #include <command.h> #if (CONFIG_COMMANDS & CFG_CMD_CACHE) static int on_off (const char *); int do_icache ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { switch (argc) { case 2: /* on / off */ switch (on_off(argv[1])) { #if 0 /* prevented by varargs handling; FALLTROUGH is harmless, too */ default: printf ("Usage:\n%s\n", cmdtp->usage); return; #endif case 0: icache_disable(); break; case 1: icache_enable (); break; } /* FALL TROUGH */ case 1: /* get status */ printf ("Instruction Cache is %s\n", icache_status() ? "ON" : "OFF"); return 0; default: printf ("Usage:\n%s\n", cmdtp->usage); return 1; } return 0; } int do_dcache ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { switch (argc) { case 2: /* on / off */ switch (on_off(argv[1])) { #if 0 /* prevented by varargs handling; FALLTROUGH is harmless, too */ default: printf ("Usage:\n%s\n", cmdtp->usage); return; #endif case 0: dcache_disable(); break; case 1: dcache_enable (); break; } /* FALL TROUGH */ case 1: /* get status */ printf ("Data (writethrough) Cache is %s\n", dcache_status() ? "ON" : "OFF"); return 0; default: printf ("Usage:\n%s\n", cmdtp->usage); return 1; } return 0; } static int on_off (const char *s) { if (strcmp(s, "on") == 0) { return (1); } else if (strcmp(s, "off") == 0) { return (0); } return (-1); } U_BOOT_CMD( icache, 2, 1, do_icache, "icache - enable or disable instruction cache\n", "[on, off]\n" " - enable or disable instruction cache\n" ); U_BOOT_CMD( dcache, 2, 1, do_dcache, "dcache - enable or disable data cache\n", "[on, off]\n" " - enable or disable data (writethrough) cache\n" ); #endif /* CFG_CMD_CACHE */