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cpu/intel/common/fsb.c: add Crystal Well support 

Without this change, there will be no console output when using a
Crystal Well CPU.

Tested with i5-4570R (with LGA1150 mod) on ASRock H81M-HDS.

Change-Id: Id18645c52d9c4a4ea7acb602bcb39b796d9e24b9
Signed-off-by: Iru Cai <mytbk920423@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44065
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Iru Cai 2020-07-30 22:57:09 +08:00 committed by Patrick Georgi
parent 2aedc9776a
commit 9c20ad6da2
1 changed files with 1 additions and 0 deletions
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src/cpu/intel/common/fsb.c
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@ -45,6 +45,7 @@ static int get_fsb_tsc(int *fsb, int *ratio)
case 0x3a: /* IvyBridge BCLK fixed at 100MHz */
case 0x3c: /* Haswell BCLK fixed at 100MHz */
case 0x45: /* Haswell-ULT BCLK fixed at 100MHz */
case 0x46: /* Haswell-GT3e BCLK fixed at 100MHz */
*fsb = 100;
*ratio = (rdmsr(MSR_PLATFORM_INFO).lo >> 8) & 0xff;
break;