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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 <krishna.p.bhat.d@intel.com>
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78052
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: sridhar siricilla <siricillasridhar@gmail.com>
This commit is contained in:
Krishna Prasad Bhat 2023-09-21 22:40:43 +05:30 committed by sridhar siricilla
parent 64ec6a77be
commit 17cea380d9
1 changed files with 3 additions and 1 deletions
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4
src/commonlib/bsd/include/commonlib/bsd/cbmem_id.h
View File

@ -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_ */