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

[Sridhar Siricilla (Code Review)]

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

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

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

to look at the new patch set (#80).

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

The following changes have been done in this patch:
  Get the CSE partition info containing version of CSE 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
   - If CSE's current boot partition is not RO, then
    * Set the CSE's next boot partition to RO using SET_BOOT_PARTITION
         HECI command.
    * Send global reset command to reset the system.
   - Enable HMRFPO (Host ME Region Flash Protection Override) operation
     mode using HMRFPO_ENABLE HECI command
   - Erase and Copy the CBFS CSE RW to CSE 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 CSE RW partition.

TEST=Verified basic update flows on hatch and helios.
BUG=b:111330995

Change-Id: I12f6bba3324069d65edabaccd234006b0840e700
Signed-off-by: Rizwan Qureshi 
Signed-off-by: Sridhar Siricilla 
Signed-off-by: V Sowmya 
---
A Documentation/soc/intel/cse_fw_update/Layout_after.svg
A Documentation/soc/intel/cse_fw_update/Layout_before.svg
A Documentation/soc/intel/cse_fw_update/cse_fw_update.md
M Documentation/soc/intel/index.md
M src/soc/intel/common/block/cse/Kconfig
M src/soc/intel/common/block/cse/custom_bp.c
6 files changed, 703 insertions(+), 22 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/03/35403/80