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authorMatthew McClintock <msm@freescale.com>2011-05-24 10:09:05 +0000
committerWolfgang Denk <wd@denx.de>2011-07-26 14:30:08 +0200
commitd0c4c33850793be7e211d1cb20c9e0ce67c26c3b (patch)
tree2a28c0f25beb867fd425bdc7ce8b76dc62c2a6c3
parent0e0996ef4fb340bd91ce6588a998cdaf10f43a42 (diff)
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command/cmd_cache.c: Add optional flush arguments
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>
-rw-r--r--common/cmd_cache.c37
1 files changed, 28 insertions, 9 deletions
diff --git a/common/cmd_cache.c b/common/cmd_cache.c
index 5cdd834..9778d3b 100644
--- a/common/cmd_cache.c
+++ b/common/cmd_cache.c
@@ -26,18 +26,27 @@
*/
#include <common.h>
#include <command.h>
+#include <linux/compiler.h>
-static int on_off (const char *);
+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 (on_off(argv[1])) {
+ 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 */
@@ -50,15 +59,23 @@ int do_icache ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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 (on_off(argv[1])) {
+ 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 */
@@ -72,9 +89,11 @@ int do_dcache ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
}
-static int on_off (const char *s)
+static int parse_argv(const char *s)
{
- if (strcmp(s, "on") == 0) {
+ if (strcmp(s, "flush") == 0) {
+ return (2);
+ } else if (strcmp(s, "on") == 0) {
return (1);
} else if (strcmp(s, "off") == 0) {
return (0);
@@ -86,13 +105,13 @@ static int on_off (const char *s)
U_BOOT_CMD(
icache, 2, 1, do_icache,
"enable or disable instruction cache",
- "[on, off]\n"
- " - 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]\n"
- " - enable or disable data (writethrough) cache"
+ "[on, off, flush]\n"
+ " - enable, disable, or flush data (writethrough) cache"
);