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, Tim Wawrzynczak, 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 (#7).

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 and 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. Calculate 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, 19 insertions(+), 5 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/74/51374/7