Stefan Reinauer ([email protected]) just uploaded a new patch set to 
gerrit, which you can find at http://review.coreboot.org/1302

-gerrit

commit 0bcdec8a18ce4061710fa212adabc4fdc63b2f4b
Author: Duncan Laurie <[email protected]>
Date:   Sat Jun 23 13:22:25 2012 -0700

    RTC: Add defines for standard clock offsets
    
    ELOG reads from RTC to build timestamp structure,
    the resulting timestamp is decoded when printing events.
    
    Change-Id: If26552074f18de5095b967b875a0ac1d815a5b31
    Signed-off-by: Duncan Laurie <[email protected]>
---
 src/include/pc80/mc146818rtc.h |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/src/include/pc80/mc146818rtc.h b/src/include/pc80/mc146818rtc.h
index a1f06e7..9f18ba4 100644
--- a/src/include/pc80/mc146818rtc.h
+++ b/src/include/pc80/mc146818rtc.h
@@ -76,6 +76,18 @@
 # define RTC_VRT 0x80          /* valid RAM and time */
 /**********************************************************************/
 
+/* Date and Time in RTC CMOS */
+#define RTC_CLK_SECOND         0
+#define RTC_CLK_SECOND_ALARM   1
+#define RTC_CLK_MINUTE         2
+#define RTC_CLK_MINUTE_ALARM   3
+#define RTC_CLK_HOUR           4
+#define RTC_CLK_HOUR_ALARM     5
+#define RTC_CLK_DAYOFWEEK      6
+#define RTC_CLK_DAYOFMONTH     7
+#define RTC_CLK_MONTH          8
+#define RTC_CLK_YEAR           9
+
 /* On PCs, the checksum is built only over bytes 16..45 */
 #define PC_CKS_RANGE_START     16
 #define PC_CKS_RANGE_END       45

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