Author: oxygene Date: Tue Aug 17 12:14:50 2010 New Revision: 5711 URL: https://tracker.coreboot.org/trac/coreboot/changeset/5711
Log: libpayload: Add function to fix CMOS checksum. Signed-off-by: Stefan Reinauer <[email protected]> Acked-by: Myles Watson <[email protected]> Modified: trunk/payloads/libpayload/drivers/options.c trunk/payloads/libpayload/include/libpayload.h Modified: trunk/payloads/libpayload/drivers/options.c ============================================================================== --- trunk/payloads/libpayload/drivers/options.c Tue Aug 17 11:52:01 2010 (r5710) +++ trunk/payloads/libpayload/drivers/options.c Tue Aug 17 12:14:50 2010 (r5711) @@ -48,6 +48,23 @@ 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; Modified: trunk/payloads/libpayload/include/libpayload.h ============================================================================== --- trunk/payloads/libpayload/include/libpayload.h Tue Aug 17 11:52:01 2010 (r5710) +++ trunk/payloads/libpayload/include/libpayload.h Tue Aug 17 12:14:50 2010 (r5711) @@ -194,6 +194,7 @@ /** @} */ /* drivers/option.c */ +void fix_options_checksum(void); int get_option(void *dest, char *name); /** -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
