| // 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 <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"); |
| } |
| |
| static 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; |
| } |
| 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(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" |
| ); |