u-boot/common/cmd_cache.c

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/*
* (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>
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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");
}
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int do_icache(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
switch (argc) {
case 2: /* on / off */
switch (parse_argv(argv[1])) {
case 0:
icache_disable();
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break;
case 1:
icache_enable();
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break;
case 2:
invalidate_icache_all();
break;
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}
break;
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case 1: /* get status */
printf("Instruction Cache is %s\n",
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icache_status() ? "ON" : "OFF");
return 0;
default:
return CMD_RET_USAGE;
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}
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[])
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{
switch (argc) {
case 2: /* on / off */
switch (parse_argv(argv[1])) {
case 0:
dcache_disable();
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break;
case 1:
dcache_enable();
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break;
case 2:
flush_dcache_all();
break;
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}
break;
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case 1: /* get status */
printf("Data (writethrough) Cache is %s\n",
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dcache_status() ? "ON" : "OFF");
return 0;
default:
return CMD_RET_USAGE;
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}
return 0;
}
static int parse_argv(const char *s)
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{
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;
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}
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"
);