Change in coreboot[master]: soc/intel/common/../car: Calculate SF Mask#1 based on MSR 0xc87

[Subrata Banik (Code Review)]

Attention is currently required from: Furquan Shaikh, Subrata Banik, Nick Vaccaro, EricR Lai.
Hello build bot (Jenkins), Furquan Shaikh, Tim Wawrzynczak, Angel Pons, Nick Vaccaro, Patrick Rudolph, EricR Lai,

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

https://review.coreboot.org/c/coreboot/+/51374

to look at the new patch set (#6).

Change subject: soc/intel/common/../car: Calculate SF Mask#1 based on MSR 0xc87
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soc/intel/common/../car: Calculate SF Mask#1 based on MSR 0xc87

MSR IA_SF_QOS_INFO (0xc87) has been introduced since TGL is used
to find out the NUM_SNOOP_FILTER_WAYS. Bit[5:0] of MSR 0xc87
indicates the maximum numbers of bits that may be set in any of
the SF MASK register. Hence, this patch calculates SF way count to
program SF Mask#1 using below logic:

1. Calcuate SFWayCnt = (MSR 0xC87) & 0x3f
2. Set SF_MASK_1 = ((1 << SFWayCnt) - 1) - ((1 << data_ways) - 1)

Change-Id: Ifd0b7e1a90cad4a4837adf6067fe8301dcd0a941
Signed-off-by: Subrata Banik 
---
M src/include/cpu/x86/msr.h
M src/soc/intel/common/block/cpu/car/cache_as_ram.S
2 files changed, 9 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/74/51374/6