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fix(rme): map DEVICE0_BASE as EL3_PAS

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To pass SMMUv3 Realm Page 0 address to RMM
in Boot Manifest, BL31 needs to read SMMU_ROOT_IDR0
register. BL31 at EL3 runs in Root mode, but
CoreSight and peripherals at DEVICE0_BASE
(0x2000_0000) including SMMUv3 at 0x2B40_0000 are
mapped as MT_SECURE which results in RAZ access
to all SMMUv3 registers after enabling MMU.
This patch changes MT_SECURE mapping to EL3_PAS
resulting in MT_SECURE (ENABLE_RME = 0), and
MT_ROOT (ENABLE_RME = 1).

Change-Id: I3d9ae7c86e4836dd6722fa64116a14d8c8aed8da
Signed-off-by: AlexeiFedorov <Alexei.Fedorov@arm.com>
This commit is contained in:
AlexeiFedorov 2025-02-13 13:14:34 +00:00 • committed by Alexei Fedorov
parent 7a6230c18c
commit b577248061
1 changed files with 1 additions and 1 deletions

2
plat/arm/board/fvp/fvp_common.c
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@ -52,7 +52,7 @@ arm_config_t arm_config;
#define MAP_DEVICE0 MAP_REGION_FLAT(DEVICE0_BASE, \
DEVICE0_SIZE, \
MT_DEVICE | MT_RW | MT_SECURE)
MT_DEVICE | MT_RW | EL3_PAS)
#define MAP_DEVICE1 MAP_REGION_FLAT(DEVICE1_BASE, \
DEVICE1_SIZE, \