This patch adds a configurable flash auto protection list that can be used
to make U-Boot protect flash regions in flash_init().
The idea has been discussed on the u-boot mailing list starting
on Nov 18th, 2007.
Even this patch brings a new feature it is used as a bugfix for 4xx
platforms where flash_init() does not completely protect the
monitor's flash range in all situations.
U-Boot protects the flash range from CFG_MONITOR_BASE to
(CFG_MONITOR_BASE + monitor_flash_len - 1) by default. This does not
include the reset vector at 0xfffffffc.
Example:
#define CFG_FLASH_AUTOPROTECT_LIST {{0xfff80000, 0x80000}}
This config option will auto protect the last 512k of flash that
contains the bootloader on board like APC405 and PMC405.
Signed-off-by: Matthias Fuchs <[EMAIL PROTECTED]>
---
drivers/mtd/cfi_flash.c | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c
index e3cfb8a..68ab55f 100644
--- a/drivers/mtd/cfi_flash.c
+++ b/drivers/mtd/cfi_flash.c
@@ -1873,6 +1873,12 @@ unsigned long flash_init (void)
{
unsigned long size = 0;
int i;
+#if defined(CFG_FLASH_AUTOPROTECT_LIST)
+ struct apl_s {
+ ulong start;
+ ulong size;
+ } apl[] = CFG_FLASH_AUTOPROTECT_LIST;
+#endif
#ifdef CFG_FLASH_PROTECTION
char *s = getenv("unlock");
@@ -1966,6 +1972,17 @@ unsigned long flash_init (void)
CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
flash_get_info(CFG_ENV_ADDR_REDUND));
#endif
+
+#if defined(CFG_FLASH_AUTOPROTECT_LIST)
+ for (i = 0; i < (sizeof(apl) / sizeof(struct apl_s)); i++) {
+ debug("autoprotecting from %08x to %08x\n",
+ apl[i].start, apl[i].start + apl[i].size - 1);
+ flash_protect (FLAG_PROTECT_SET,
+ apl[i].start,
+ apl[i].start + apl[i].size - 1,
+ flash_get_info(apl[i].start));
+ }
+#endif
return (size);
}
--
1.5.3
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