[PATCH 0/2] add support for hs bootflows on am62 devices

Kamlesh Gurudasani kamlesh at ti.com
Fri Mar 3 10:09:29 CET 2023

Bryan Brattlof <bb at ti.com> writes:

> Hi Kamlesh!
> On March  2, 2023 thus sayeth kamlesh at ti.com:
>> From: Kamlesh Gurudasani <kamlesh at ti.com>
>> Add support for high security bootflow on am62 devices.
>> On HS devices, ROM and TIFS will protect the RAM regions with
>> firewalls. This means the wakeup domain's SPL will need to move the
>> stack and heap to HSM RAM to ensure it stays within its allotted
>> memory regions.

> Thanks for getting this fixed! Does TIFS drop the On Chip SRAM firewall 
> completely once it's started? or only for the r5?
It is open completely after TIFS drops it.

It is generic RAM, should be available for use to
all cores. Ideally, it should have been opened up by ROM only, then we
wouldn't have run in to this issue. (r5 accessing it before TIFS opens
it up)

Thanks for the review.

> Reviewed-by: Bryan Brattlof <bb at ti.com>
> ~Bryan

More information about the U-Boot mailing list