Djam/arm-trusted-firmware
1
0
Fork 0
mirror of https://github.com/ARM-software/arm-trusted-firmware.git synced 2025-04-08 05:43:53 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Merge "docs(ras): document RAS considerations with powerdown" into integration

Browse source
This commit is contained in:
Manish V Badarkhe 2025-03-04 14:25:20 +01:00 • committed by TrustedFirmware Code Review
commit 4d6315e9a6
1 changed files with 12 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
docs/porting-guide.rst
View file

@ -3459,6 +3459,18 @@ This API is used to setup the early console, it is required only if the flag
External Abort handling and RAS Support External Abort handling and RAS Support
--------------------------------------- ---------------------------------------
If any cores on the platform support powerdown abandon (i.e. ``FEAT_PABANDON``
is set, check the "Core powerup and powerdown sequence" in their TRMs), then
these functions should be able to handle being called with power domains off and
after the powerdown ``wfi``. In other words it may run after a call to
``pwr_domain_suspend()`` and before a call to ``pwr_domain_suspend_finish()``
(and their power off counterparts).
Should this not be desirable, or if there is no powerdown abandon support, then
RAS errors should be masked by writing any relevant error records in any
powerdown hooks to prevent deadlocks due to a RAS error after the point of no
return. See the core's TRM for further information.
Function : plat_ea_handler Function : plat_ea_handler
~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~