mirror of
https://github.com/AsahiLinux/u-boot
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d0c4c33850
It might be desirable to have the ability to flush icache/dcache within u-boot, this patch gives each arch the ability to provide a flush_dcache/flush_icache function to let u-boot flush caches from the prompt Signed-off-by: Matthew McClintock <msm@freescale.com>
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/*
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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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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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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 <common.h>
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#include <command.h>
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#include <linux/compiler.h>
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static int parse_argv(const char *);
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void __weak flush_icache(void)
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{
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/* please define arch specific flush_icache */
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puts("No arch specific flush_icache available!\n");
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}
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int do_icache ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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switch (argc) {
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case 2: /* on / off */
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switch (parse_argv(argv[1])) {
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case 0: icache_disable();
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break;
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case 1: icache_enable ();
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break;
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case 2: flush_icache();
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break;
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}
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/* FALL TROUGH */
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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_usage(cmdtp);
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}
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return 0;
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}
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void __weak flush_dcache(void)
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{
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puts("No arch specific flush_dcache available!\n");
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/* please define arch specific flush_dcache */
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}
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int do_dcache ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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switch (argc) {
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case 2: /* on / off */
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switch (parse_argv(argv[1])) {
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case 0: dcache_disable();
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break;
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case 1: dcache_enable ();
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break;
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case 2: flush_dcache();
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break;
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}
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/* FALL TROUGH */
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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_usage(cmdtp);
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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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}
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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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