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cmd_bootm.c

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  • Forked from Reform / reform-boundary-uboot
    Source project has a limited visibility.
    cmd_cache.c 2.74 KiB
    /*
     * (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>
    #include <linux/compiler.h>
    
    static int parse_argv(const char *);
    
    void __weak invalidate_icache_all(void)
    {
    	/* please define arch specific invalidate_icache_all */
    	puts("No arch specific invalidate_icache_all available!\n");
    }
    
    int do_icache(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	switch (argc) {
    	case 2:			/* on / off	*/
    		switch (parse_argv(argv[1])) {
    		case 0:
    			icache_disable();
    			break;
    		case 1:
    			icache_enable();
    			break;
    		case 2:
    			invalidate_icache_all();
    			break;
    		}
    		/* FALL TROUGH */
    	case 1:			/* get status */
    		printf("Instruction Cache is %s\n",
    			icache_status() ? "ON" : "OFF");
    		return 0;
    	default:
    		return CMD_RET_USAGE;
    	}
    	return 0;
    }
    
    void __weak flush_dcache_all(void)
    {
    	puts("No arch specific flush_dcache_all available!\n");
    	/* please define arch specific flush_dcache_all */
    }
    
    int do_dcache(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	switch (argc) {
    	case 2:			/* on / off */
    		switch (parse_argv(argv[1])) {
    		case 0:
    			dcache_disable();
    			break;
    		case 1:
    			dcache_enable();
    			break;
    		case 2:
    			flush_dcache_all();
    			break;
    		}
    		break;
    	case 1:			/* get status */
    		printf("Data (writethrough) Cache is %s\n",
    			dcache_status() ? "ON" : "OFF");
    		return 0;
    	default:
    		return CMD_RET_USAGE;
    	}
    	return 0;
    }
    
    static int parse_argv(const char *s)
    {
    	if (strcmp(s, "flush") == 0)
    		return 2;
    	else 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,
    	"enable or disable instruction cache",
    	"[on, off, flush]\n"
    	"    - enable, disable, or flush instruction cache"
    );
    
    U_BOOT_CMD(
    	dcache,   2,   1,     do_dcache,
    	"enable or disable data cache",
    	"[on, off, flush]\n"
    	"    - enable, disable, or flush data (writethrough) cache"
    );