From c63ad6325a8ac0097a54b418a3288926b0484b18 Mon Sep 17 00:00:00 2001 From: Matthias Fuchs Date: Fri, 18 Apr 2008 16:29:40 +0200 Subject: cfi-flash: Add CFG_FLASH_AUTOPROTECT_LIST 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 --- drivers/mtd/cfi_flash.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'drivers') 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); } -- cgit v1.1