[S] Change in coreboot[main]: soc/intel/mtl: Override SOC_INTEL_CSE_FW_PARTITION_CMOS_OFFSET

[Subrata Banik (Code Review)]

Subrata Banik has submitted this change. ( https://review.coreboot.org/c/coreboot/+/78054?usp=email )

Change subject: soc/intel/mtl: Override SOC_INTEL_CSE_FW_PARTITION_CMOS_OFFSET
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soc/intel/mtl: Override SOC_INTEL_CSE_FW_PARTITION_CMOS_OFFSET

CSE firmware downgrade and PSR data backup flows involve global resets,
there is a need to track the PSR data backup status across resets. In
the subsequent patches, a CMOS structure to store PSR back-up status
will be added.

The current SOC_INTEL_CSE_FW_PARTITION_CMOS_OFFSET of 68 can only store
cse_specific_info, as ramtop is at offset 100 and PSR back-up status
structure will not be able to fit within the range.

This patch overrides the SOC_INTEL_CSE_FW_PARTITION_CMOS_OFFSET to 161
to accommodate all CSE related info in adjacent CMOS memory.

BUG=b:273207144
TEST=Verify CSE RW FW versions are stored in CMOS memory in rex.

Change-Id: I8bae5245f93b99be15b4e59cfeffbc23eec95001
Signed-off-by: Krishna Prasad Bhat 
Signed-off-by: Rizwan Qureshi 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78054
Reviewed-by: Kapil Porwal 
Reviewed-by: Subrata Banik 
Tested-by: build bot (Jenkins) 
---
M src/soc/intel/meteorlake/Kconfig
1 file changed, 10 insertions(+), 0 deletions(-)

Approvals:
  Subrata Banik: Looks good to me, approved
  Kapil Porwal: Looks good to me, approved
  build bot (Jenkins): Verified

diff --git a/src/soc/intel/meteorlake/Kconfig b/src/soc/intel/meteorlake/Kconfig
index 1c61547..a416e88 100644
--- a/src/soc/intel/meteorlake/Kconfig
+++ b/src/soc/intel/meteorlake/Kconfig
@@ -439,4 +439,14 @@
 config HAVE_BMP_LOGO_COMPRESS_LZMA
    default n

+# The default offset to store CSE RW FW version information is at 68.
+# However, in Intel Meteor Lake based systems that use PSR, the additional
+# size required to keep CSE RW FW version information and PSR back-up status
+# in adjacent CMOS memory at offset 68 is not available. Therefore, we
+# override the default offset to 161, which has enough space to keep both
+# the CSE related information together.
+config SOC_INTEL_CSE_FW_PARTITION_CMOS_OFFSET
+	int
+	default 161
+
 endif