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authorKrishna Prasad Bhat <krishna.p.bhat.d@intel.com>2023-08-07 21:48:23 +0530
committersridhar siricilla <siricillasridhar@gmail.com>2023-09-23 16:48:11 +0000
commitc3c71c3783c253c6dd9e5fa19ad98f2efcc0c2d4 (patch)
tree8534642e1ce0e265e2616e11739fc028fa2cba43 /src/mainboard/clevo
parent0cd873f585f92de81476849f2aa1c6e1a47b26c3 (diff)
soc/intel/cse: Make cse_bp_info response global
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. CSE Lite SKU firmware supports a command to backup PSR data before initiating a firmware downgrade. PSR data backup command works only after memory has been initialized. Moving only the downgrade would add complexity of splitting the cse_fw_sync across pre-RAM and post-RAM stages. So the idea is to move cse_fw_sync into ramstage when PSR is enabled. We are introducing a flow to get CSE boot partition info in early romstage and then same data will be stored in cbmem once DRAM is initialized. The CSE BP info data in cbmem will be utilized in early ramstage to perform cse firmware sync operations. This helps in avoiding re-sending the CSE get boot partition info command in ramstage. Having cse_bp_info_rsp as global helps in de-linking cse_get_bp_info from cse_fw_sync. Many functions take cse_bp_info as input parameter. Since cse_bp_info_rsp is global now, we can make use of global cse_bp_info and remove it as input parameter from those functions. BUG=b:273207144 TEST=Verify cse_bp_info_rsp holds value across the stage. Change-Id: I0ee050b49fcae574882378b94329c36a228e6815 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/+/77070 Reviewed-by: sridhar siricilla <siricillasridhar@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Anil Kumar K <anil.kumar.k@intel.com>
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