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soc/intel/cannonlake: Use EBDA area to store cbmem_top address

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This patch uses BIOS EBDA area to store relevent details
like cbmem top during romstage after MRC init is done.
Also provide provision to use the same EBDA data across
various stages without reexecuting memory map algorithm.

BRANCH=none
BUG=b:63974384
TEST=Ensures HW based memmap algorithm is executing once in romstage
and store required data into EBDA for other stage to avoid redundant
calculation and get cbmem_top start from EBDA area.

Change-Id: I763ad8181396ea8d8c0d5cf088264791ba62dceb
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/21985
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Subrata Banik
2017-10-12 17:59:02 +05:30
committed by Aaron Durbin
parent d2cadc39f3
commit 47569cf3a9
5 changed files with 77 additions and 50 deletions
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src/soc/intel/cannonlake/Kconfig
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@@ -46,6 +46,7 @@ config CPU_SPECIFIC_OPTIONS
select SOC_INTEL_COMMON_BLOCK_CPU
select SOC_INTEL_COMMON_BLOCK_CPU_MPINIT
select SOC_INTEL_COMMON_BLOCK_CSE
select SOC_INTEL_COMMON_BLOCK_EBDA
select SOC_INTEL_COMMON_BLOCK_FAST_SPI
select SOC_INTEL_COMMON_BLOCK_GPIO
select SOC_INTEL_COMMON_BLOCK_GSPI