diff options
Diffstat (limited to 'src/arch/x86/include/bootblock_common.h')
| -rw-r--r-- | src/arch/x86/include/bootblock_common.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/arch/x86/include/bootblock_common.h b/src/arch/x86/include/bootblock_common.h index bd1968202f..c9674f4a9c 100644 --- a/src/arch/x86/include/bootblock_common.h +++ b/src/arch/x86/include/bootblock_common.h @@ -34,3 +34,27 @@ static void sanitize_cmos(void) } } #endif + +#if CONFIG_CMOS_POST +#include <pc80/mc146818rtc.h> + +static void cmos_post_init(void) +{ + u8 magic = CMOS_POST_BANK_0_MAGIC; + + /* Switch to the other bank */ + switch (cmos_read(CMOS_POST_BANK_OFFSET)) { + case CMOS_POST_BANK_1_MAGIC: + break; + case CMOS_POST_BANK_0_MAGIC: + magic = CMOS_POST_BANK_1_MAGIC; + break; + default: + /* Initialize to zero */ + cmos_write(0, CMOS_POST_BANK_0_OFFSET); + cmos_write(0, CMOS_POST_BANK_1_OFFSET); + } + + cmos_write(magic, CMOS_POST_BANK_OFFSET); +} +#endif |