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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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