From f8970f53eff5114f819df84196efa4e4539cbba1 Mon Sep 17 00:00:00 2001 From: Alexander Couzens Date: Sat, 10 Oct 2015 16:04:59 +0200 Subject: 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 Reviewed-on: https://review.coreboot.org/11853 Tested-by: build bot (Jenkins) Reviewed-by: Nico Huber --- src/mainboard/lenovo/x220/cmos.layout | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'src/mainboard/lenovo/x220') 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 -- cgit v1.2.3