tree f5bb93baf83f71586ae07fa218bf208af825fdce
parent 707f0710490a2e1c8442f16b12aa94edd4ac6cd3
author Zelalem Aweke <zelalem.aweke@arm.com> 1627353545 -0500
committer Zelalem Aweke <zelalem.aweke@arm.com> 1633452960 -0500

fix(plat/fvp): allow changing the kernel DTB load address

We currently use ARM_PRELOADED_DTB_BASE build
variable to pass the kernel DTB base address to
the kernel when using the ARM_LINUX_KERNEL_AS_BL33
option. However this variable doesn't actually
change the DTB load address.

The DTB load address is actually specified in the
FW_CONFIG DTS (fvp_fw_config.dts) as 'hw_config'.
This patch passes the hw_config value instead of
ARM_PRELOADED_DTB_BASE allowing us to change
the kernel DTB load address through
fvp_fw_config.dts.

With this change we don't need the ARM_PRELOADED_DTB_BASE
build variable if RESET_TO_BL31 is not set.
Note that the hw_config value needs to be within the
ARM_DTB_DRAM_NS region specified by FVP_DTB_DRAM_MAP_START
and FVP_DTB_DRAM_MAP_SIZE.

This patch also expands the ARM_DTB_DRAM_NS region to 32MB.

Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com>
Change-Id: Idd74cdf5d2c649bb320644392ba5d69e175a53a9