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-rw-r--r--src/include/pc80/mc146818rtc.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/include/pc80/mc146818rtc.h b/src/include/pc80/mc146818rtc.h
index 9f18ba49e8..a916761222 100644
--- a/src/include/pc80/mc146818rtc.h
+++ b/src/include/pc80/mc146818rtc.h
@@ -87,6 +87,10 @@
#define RTC_CLK_DAYOFMONTH 7
#define RTC_CLK_MONTH 8
#define RTC_CLK_YEAR 9
+#define RTC_CLK_ALTCENTURY 0x32
+
+#define RTC_HAS_ALTCENTURY 1
+#define RTC_HAS_NO_ALTCENTURY 0
/* On PCs, the checksum is built only over bytes 16..45 */
#define PC_CKS_RANGE_START 16
@@ -136,6 +140,7 @@ static inline void cmos_write32(u8 offset, u32 value)
#if !defined(__ROMCC__)
void rtc_init(int invalid);
+void rtc_check_update_cmos_date(u8 has_century);
#if CONFIG_USE_OPTION_TABLE
int set_option(const char *name, void *val);
int get_option(void *dest, const char *name);