[coreboot] [commit] r5711 - in trunk/payloads/libpayload: drivers include

[repository service]

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 <stepan at coresystems.de>
Acked-by: Myles Watson <mylesgw at gmail.com>

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);
 
 /**