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7d6cee2cd0
It should be up to an architecture to decide how to implement cache functions, and if they need to use weak functions or not. Allowing the cache command to be built without cache functionality implemented is unhelpful. Further, guard the call to noncached_set_region with CONFIG_SYS_NONCACHED_MEMORY as that's when it's implemented and again is an architecture specific detail. Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Tom Rini <trini@konsulko.com>
102 lines
1.9 KiB
C
102 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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/*
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* Cache support: switch on or off, get status
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*/
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#include <command.h>
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#include <cpu_func.h>
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#include <linux/compiler.h>
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static int parse_argv(const char *);
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static int do_icache(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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switch (argc) {
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case 2: /* on / off / flush */
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switch (parse_argv(argv[1])) {
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case 0:
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icache_disable();
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break;
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case 1:
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icache_enable();
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break;
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case 2:
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invalidate_icache_all();
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break;
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default:
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return CMD_RET_USAGE;
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}
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break;
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case 1: /* get status */
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printf("Instruction Cache is %s\n",
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icache_status() ? "ON" : "OFF");
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return 0;
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default:
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return CMD_RET_USAGE;
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}
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return 0;
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}
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static int do_dcache(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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switch (argc) {
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case 2: /* on / off / flush */
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switch (parse_argv(argv[1])) {
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case 0:
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dcache_disable();
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break;
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case 1:
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dcache_enable();
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#ifdef CONFIG_SYS_NONCACHED_MEMORY
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noncached_set_region();
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#endif
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break;
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case 2:
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flush_dcache_all();
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break;
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default:
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return CMD_RET_USAGE;
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}
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break;
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case 1: /* get status */
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printf("Data (writethrough) Cache is %s\n",
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dcache_status() ? "ON" : "OFF");
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return 0;
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default:
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return CMD_RET_USAGE;
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}
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return 0;
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}
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static int parse_argv(const char *s)
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{
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if (strcmp(s, "flush") == 0)
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return 2;
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else if (strcmp(s, "on") == 0)
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return 1;
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else if (strcmp(s, "off") == 0)
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return 0;
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return -1;
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}
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U_BOOT_CMD(
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icache, 2, 1, do_icache,
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"enable or disable instruction cache",
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"[on, off, flush]\n"
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" - enable, disable, or flush instruction cache"
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);
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U_BOOT_CMD(
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dcache, 2, 1, do_dcache,
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"enable or disable data cache",
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"[on, off, flush]\n"
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" - enable, disable, or flush data (writethrough) cache"
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);
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