diff options
| author | Stefan Reinauer <stepan@coresystems.de> | 2010-08-17 10:14:50 +0000 |
|---|---|---|
| committer | Patrick Georgi <patrick.georgi@coresystems.de> | 2010-08-17 10:14:50 +0000 |
| commit | 59a1b7f7f1a847e20b58dbf426ba00b6b1fc8344 (patch) | |
| tree | 004e8c078bc9c77c6da45f6db088d728cbdbd7b1 /payloads/libpayload/drivers/options.c | |
| parent | 835674b9298b19315ae1ed70c2fc9d82a7f3535b (diff) | |
libpayload: Add function to fix CMOS checksum.
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Myles Watson <mylesgw@gmail.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5711 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'payloads/libpayload/drivers/options.c')
| -rw-r--r-- | payloads/libpayload/drivers/options.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/options.c b/payloads/libpayload/drivers/options.c index 5117300427..1c692f46e0 100644 --- a/payloads/libpayload/drivers/options.c +++ b/payloads/libpayload/drivers/options.c @@ -48,6 +48,23 @@ static int options_checksum_valid(void) return (checksum_old == checksum); } +void fix_options_checksum(void) +{ + int i; + int range_start = lib_sysinfo.cmos_range_start / 8; + int range_end = lib_sysinfo.cmos_range_end / 8; + int checksum_location = lib_sysinfo.cmos_checksum_location / 8; + u16 checksum = 0; + + for(i = range_start; i <= range_end; i++) { + checksum += nvram_read(i); + } + checksum = (~checksum)&0xffff; + + nvram_write((checksum >> 8), checksum_location); + nvram_write((checksum & 0xff), checksum_location + 1); +} + static int get_cmos_value(u32 bitnum, u32 len, void *valptr) { u8 *value = (u8 *)valptr; |