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nb/intel/sandybridge: Limit SRT to Ivy Bridge and slow RAM 

Reference code never enables SRT for Sandy Bridge, and only enables it
for Ivy Bridge when the memory frequency is at most 1066 MHz.

Tested on Asus P8H61-M PRO, still boots.

Change-Id: I50527f311340584cf8290de2114ec2694cca3a83
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47568
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This commit is contained in:
Angel Pons 2020-11-13 13:42:07 +01:00
parent 7f1363d9b4
commit dca3cb572b
1 changed files with 3 additions and 2 deletions
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5
src/northbridge/intel/sandybridge/raminit_common.c
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@ -759,13 +759,14 @@ static void dram_mr2(ramctr_timing *ctrl, u8 rank, int channel)
{
u16 pasr, cwl, mr2reg;
odtmap odt;
int srt;
int srt = 0;
pasr = 0;
cwl = ctrl->CWL - 5;
odt = get_ODT(ctrl, channel);
srt = ctrl->extended_temperature_range && !ctrl->auto_self_refresh;
if (IS_IVY_CPU(ctrl->cpu) && ctrl->tCK >= TCK_1066MHZ)
srt = ctrl->extended_temperature_range && !ctrl->auto_self_refresh;
mr2reg = 0;
mr2reg = (mr2reg & ~0x07) | pasr;