Change in coreboot[master]: soc/intel/common/timer: Make TSC frequency calculation dynamically

[Subrata Banik (Code Review)]

Hello Aaron Durbin, Patrick Rudolph, Meera Ravindranath, Lean Sheng Tan, Aamir Bohra, Wonkyu Kim, Maulik V Vaghela, Duncan Laurie, V Sowmya, build bot (Jenkins), Furquan Shaikh,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/35148

to look at the new patch set (#9).

Change subject: soc/intel/common/timer: Make TSC frequency calculation dynamically
......................................................................

soc/intel/common/timer: Make TSC frequency calculation dynamically

tsc_freq_mhz() had a static table of Intel CPU families and crystal
clock, but it is possible to calculate the crystal clock speed dynamically,
and this is preferred over hardcoded table.

Recommendation is to make use of CPUID.16h where crystal clock frequency
was not reported by CPUID.15h to calculate the crystal clock.

On SKL/KBL/CML CPUID.15h.ecx = nominal core crystal clock = 0 Hz
hence we had to use static table to calculate crystal clock.

BUG=b:139798422, b:129839774
TEST=Able to build and boot KBL/CML/ICL.

Change-Id: If660a4b8d12e54b39252bce62bcc0ffcc967f5da
Signed-off-by: Subrata Banik 
---
D src/arch/x86/include/arch/intel-family.h
M src/soc/intel/common/block/timer/timer.c
2 files changed, 77 insertions(+), 117 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/48/35148/9