From 17cea380d9856ed5765e5233aa2d6edeaa3a16c5 Mon Sep 17 00:00:00 2001 From: Krishna Prasad Bhat Date: Thu, 21 Sep 2023 22:40:43 +0530 Subject: [PATCH] commonlib: Add CBMEM ID to store CSE Boot Partition Info PSR data is created and stored in CSE data partition. In platforms that employ CSE Lite SKU firmware, a firmware downgrade involves clearing of CSE data partition which results in PSR data being lost. In order to backup PSR data before initiating firmware downgrade, CSE Lite firmware supports a command to do this. This command works only after memory has been initialized. So the CSE firmware downgrade can be done only in post-RAM stage. CSE firmware sync actions will be moved to early ramstage to support this. Moving CSE firmware sync actions to ramstage results in cse_get_bp_info command taking additional boot time of ~45-55ms. To avoid this, cse_get_bp_info will be sent in early romstage and the response will be stored in cbmem to avoid sending the command again, and re-use in ramstage. This patch adds a CBMEM ID to store this CSE Boot Partition Info response in cbmem. BUG=b:273207144 Change-Id: I914befadab4ad0ac197435e2a2c4343a796b2b1b Signed-off-by: Krishna Prasad Bhat Signed-off-by: Rizwan Qureshi Reviewed-on: https://review.coreboot.org/c/coreboot/+/78052 Tested-by: build bot (Jenkins) Reviewed-by: sridhar siricilla --- src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h b/src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h index ad85689950..a848702f26 100644 --- a/src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h +++ b/src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h @@ -88,6 +88,7 @@ #define CBMEM_ID_AMD_STB 0x5f425453 #define CBMEM_ID_AMD_MP2 0x5f32504d #define CBMEM_ID_CSE_INFO 0x4553435F +#define CBMEM_ID_CSE_BP_INFO 0x43534542 #define CBMEM_ID_TO_NAME_TABLE \ { CBMEM_ID_ACPI, "ACPI " }, \ @@ -168,5 +169,6 @@ { CBMEM_ID_MEM_CHIP_INFO, "MEM CHIP INFO"},\ { CBMEM_ID_AMD_STB, "AMD STB"},\ { CBMEM_ID_AMD_MP2, "AMD MP2 BUFFER"},\ - { CBMEM_ID_CSE_INFO, "CSE SPECIFIC INFO"} + { CBMEM_ID_CSE_INFO, "CSE SPECIFIC INFO"},\ + { CBMEM_ID_CSE_INFO, "CSE BP INFO"} #endif /* _CBMEM_ID_H_ */