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 (#25).

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

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.
    Send global reset command to reset only the CSME
    Wait for CSME to enter SOFT_TEMP_DISABLE operation mode (indicated by HFSTS1 register bit 19:16)
    Enable HMRFPO (Host ME Region Flash Protection Override) using the HMRFPO_ENABLE HECI command
    Erase and Copy the CBFS ME RW to ME RW partition
    Set the CSE's next boot partition to RW using SET_BOOT_PARTITION HECI command
    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, 446 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/03/35403/25