Change in coreboot[master]: soc/intel/common/basecode: Implement CSE update flow

[Sridhar Siricilla (Code Review)]

Hello Patrick Rudolph, Subrata Banik, Balaji Manigandan, Aamir Bohra, Rizwan Qureshi, V Sowmya, build bot (Jenkins), Andrey Petrov, Patrick Georgi, Martin Roth, Furquan Shaikh,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/35403

to look at the new patch set (#15).

Change subject: soc/intel/common/basecode: Implement CSE update flow
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soc/intel/common/basecode: Implement CSE update flow

This is the core patch that implement CSE FW update flow.

To enable the FW update flow the following are required:

* Descriptor change to accommodate a larger CSME region
    The CSME size is 6MB for the POC.

* FMAP changes to accommodate ME update binary in RW CBFSes.
    Due to the increased CSME binary size and to accommodate the extra
    CSME RW binaries (which are ~2.5 MB) in RW CBFSes, the board FMAP has
    to be modified.

* The new CSE binary with new partitions and respective RW area binaries.

The following changes have been done in this patch:

* Implement Update flow
  Get the partition info containing version of ME RW using GET_BOOT_PARTITION_INFO HECI command
  Get the me_rw.version from the currently selected RW slot.
  If the version from the above 2 locations don't match start the update
    Set the CSE's next boot partition to RO using SET_BOOT_PARTITION HECI command.
    Enable HMRFPO (Host ME Region Flash Protection Override) using the HMRFPO_ENABLE HECI command
    Send global reset command to reset only the CSME.
    Wait for CSME to enter SECOVR_MEI_MSG operation mode (indicated by HFSTS1 register bit 19:16)
    Erase and Copy the CBFS ME RW to ME RW partition.
    Trigger global reset.
    The system should boot with the Updated ME.

Verified that the basic update flows are working on Cometlake RVP and hatch.

Change-Id: I12f6bba3324069d65edabaccd234006b0840e700
Signed-off-by: Rizwan Qureshi 
Signed-off-by: V Sowmya 
Signed-off-by: Sridhar Siricilla 
---
A src/soc/intel/common/basecode/fw_update/Kconfig
A src/soc/intel/common/basecode/fw_update/Makefile.inc
A src/soc/intel/common/basecode/fw_update/cse_update.c
A src/soc/intel/common/basecode/include/intelbasecode/cse_update.h
4 files changed, 480 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/03/35403/15