07570d592e
Following steps are required to boot JUNO in AArch32 state: 1> BL1, in AArch64 state, loads BL2. 2> BL2, in AArch64 state, initializes DDR. Loads SP_MIN & BL33 (AArch32 executable)images. Calls RUN_IMAGE SMC to go back to BL1. 3> BL1 writes AArch32 executable opcodes, to load and branch at the entrypoint address of SP_MIN, at HI-VECTOR address and then request for warm reset in AArch32 state using RMR_EL3. This patch makes following changes to facilitate above steps: * Added assembly function to carry out step 3 above. * Added region in TZC that enables Secure access to the HI-VECTOR(0xFFFF0000) address space. * AArch32 image descriptor is used, in BL2, to load SP_MIN and BL33 AArch32 executable images. A new flag `JUNO_AARCH32_EL3_RUNTIME` is introduced that controls above changes. By default this flag is disabled. NOTE: BL1 and BL2 are not supported in AArch32 state for JUNO. Change-Id: I091d56a0e6d36663e6d9d2bb53c92c672195d1ec Signed-off-by: Yatharth Kochar <yatharth.kochar@arm.com> Signed-off-by: dp-arm <dimitris.papastamos@arm.com> |
||
|---|---|---|
| .. | ||
| bl1 | ||
| bl31 | ||
| bl32 | ||
| common | ||
| drivers | ||
| lib | ||
| plat | ||
| services | ||