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>
118 lines
2.7 KiB
C
118 lines
2.7 KiB
C
/*
|
|
* (C) Copyright 2000
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
/*
|
|
* 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 flush_icache(void)
|
|
{
|
|
/* please define arch specific flush_icache */
|
|
puts("No arch specific flush_icache available!\n");
|
|
}
|
|
|
|
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: flush_icache();
|
|
break;
|
|
}
|
|
/* FALL TROUGH */
|
|
case 1: /* get status */
|
|
printf ("Instruction Cache is %s\n",
|
|
icache_status() ? "ON" : "OFF");
|
|
return 0;
|
|
default:
|
|
return cmd_usage(cmdtp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void __weak flush_dcache(void)
|
|
{
|
|
puts("No arch specific flush_dcache available!\n");
|
|
/* please define arch specific flush_dcache */
|
|
}
|
|
|
|
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();
|
|
break;
|
|
}
|
|
/* FALL TROUGH */
|
|
case 1: /* get status */
|
|
printf ("Data (writethrough) Cache is %s\n",
|
|
dcache_status() ? "ON" : "OFF");
|
|
return 0;
|
|
default:
|
|
return cmd_usage(cmdtp);
|
|
}
|
|
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"
|
|
);
|