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authorAlexander Couzens <lynxis@fe80.eu>2015-10-10 16:04:59 +0200
committerMartin Roth <martinroth@google.com>2016-01-14 17:58:29 +0100
commitf8970f53eff5114f819df84196efa4e4539cbba1 (patch)
treef8f0388d9417a8ccded471a68b8219e97ec2d74d /src/mainboard/lenovo/x220
parent485225e0a382fe398a5e8283a00fc99670306b1e (diff)
downloadcoreboot-f8970f53eff5114f819df84196efa4e4539cbba1.tar.xz
mainboard/lenovo: reserve century byte
The century byte is used by most RTC (default 0x32@nvram). Even the century byte can disabled via ACPI it's more safe to reserve it's space. Because some RTC will act with that byte anyhow. Some OS overwrite it when syncronize the RTC. Change-Id: I078c0c57215ccb925afa85b9d067f15268801ec9 Signed-off-by: Alexander Couzens <lynxis@fe80.eu> Reviewed-on: https://review.coreboot.org/11853 Tested-by: build bot (Jenkins) Reviewed-by: Nico Huber <nico.h@gmx.de>
Diffstat (limited to 'src/mainboard/lenovo/x220')
-rw-r--r--src/mainboard/lenovo/x220/cmos.layout3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mainboard/lenovo/x220/cmos.layout b/src/mainboard/lenovo/x220/cmos.layout
index 8f147cc7e8..ca2c45c933 100644
--- a/src/mainboard/lenovo/x220/cmos.layout
+++ b/src/mainboard/lenovo/x220/cmos.layout
@@ -52,7 +52,7 @@ entries
395 4 e 6 debug_level
#399 1 r 0 unused
-400 8 h 0 volume
+#400 8 r 0 reserved for century byte
# coreboot config options: southbridge
408 1 e 1 nmi
@@ -78,6 +78,7 @@ entries
# coreboot config options: northbridge
432 3 e 11 gfx_uma_size
#435 549 r 0 unused
+440 8 h 0 volume
# SandyBridge MRC Scrambler Seed values
896 32 r 0 mrc_scrambler_seed