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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
/*
* Cache support: switch on or off, get status
*/
#include <common.h>
#include <command.h>
#include <cpu_func.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");
}
__weak void noncached_set_region(void)
{
}
static int do_icache(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
switch (argc) {
case 2: /* on / off / flush */
switch (parse_argv(argv[1])) {
case 0:
icache_disable();
break;
case 1:
icache_enable();
break;
case 2:
invalidate_icache_all();
break;
default:
return CMD_RET_USAGE;
}
break;
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 */
}
static int do_dcache(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
switch (argc) {
case 2: /* on / off / flush */
switch (parse_argv(argv[1])) {
case 0:
dcache_disable();
break;
case 1:
dcache_enable();
noncached_set_region();
break;
case 2:
flush_dcache_all();
break;
default:
return CMD_RET_USAGE;
}
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"
);
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