tree 4197a0eef7b05d8bc7cfe21269f1464d1e014127
parent aa7f6cd8b363fb97efd232991eb9ccedc2316a9d
author Yann Gautier <yann.gautier@foss.st.com> 1686674703 +0200
committer Maxime Méré <maxime.mere@foss.st.com> 1726241876 +0200

feat(stm32mp2): add minimal support for BL31

Add the required files to compile BL31 on STM32MP2.
Update BL2 configuration to load BL31. The platform boots until BL31,
but stops here as no other binaries are loaded as DDR is not
initialized.
At runtime, BL31 will use only the first half of the SYSRAM, the upper
half will be used for non-secure DMA LLIs. To be sure nothing from this
area is still in the cache, invalidate the upper SYSRAM before enabling
BL31 cache. BL31 should then map only first half of the SYSRAM. But it
must temporarily map the upper half read-only, as this is where we will
retrieve BL2 parameters, used to fill registers for next boot stages.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Maxime Méré <maxime.mere@foss.st.com>
Change-Id: Ie91527a7a26625624b4b3c65fb6a0ca9dd355dbd