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 <m...@freescale.com>
---
There are some checkpatch.pl warnings for formatting issues. In this case
I choose to keep the same formatting as was used in the file already:
#44: FILE: common/cmd_cache.c:48:
+ case 2: flush_icache();
ERROR: trailing statements should be on next line
#70: FILE: common/cmd_cache.c:78:
+ case 2: flush_dcache();
ERROR: return is not a function, parentheses are not required
#84: FILE: common/cmd_cache.c:96:
+ return (2);
total: 3 errors, 0 warnings, 83 lines checked
common/cmd_cache.c | 38 +++++++++++++++++++++++++++++---------
1 files changed, 29 insertions(+), 9 deletions(-)
diff --git a/common/cmd_cache.c b/common/cmd_cache.c
index 5cdd834..78d53df 100644
--- a/common/cmd_cache.c
+++ b/common/cmd_cache.c
@@ -27,17 +27,26 @@
#include <common.h>
#include <command.h>
-static int on_off (const char *);
+static int parse_argv(const char *);
+
+void __flush_icache(void)
+{
+ /* please define arch specific flush_icache */
+ printf("No arch specific flush_icache available!\n");
+}
+void flush_icache(void) __attribute__((weak, alias("__flush_icache")));
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 +59,24 @@ int do_icache ( cmd_tbl_t *cmdtp, int flag, int argc, char
* const argv[])
return 0;
}
+void __flush_dcache(void)
+{
+ printf("No arch specific flush_dcache available!\n");
+ /* please define arch specific flush_dcache */
+}
+void flush_dcache(void) __attribute__((weak, alias("__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 +90,11 @@ 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 +106,13 @@ 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"
);
--
1.7.3.4
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