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| author | Matthias Fuchs <matthias.fuchs@esd-electronics.com> | 2008-04-18 16:29:40 +0200 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2008-04-25 15:52:14 +0200 |
| commit | c63ad6325a8ac0097a54b418a3288926b0484b18 (patch) | |
| tree | e1559e0c2898ea63e519193000b643f427a2d2e8 | |
| parent | d0d91ae3acb4f29d1a2a3a766747478ed54e2848 (diff) | |
| download | u-boot-imx-c63ad6325a8ac0097a54b418a3288926b0484b18.zip u-boot-imx-c63ad6325a8ac0097a54b418a3288926b0484b18.tar.gz u-boot-imx-c63ad6325a8ac0097a54b418a3288926b0484b18.tar.bz2 | |
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 <matthias.fuchs@esd-electronics.com>
| -rw-r--r-- | 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); } |