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qemu-arm64: Enable POSITION_INDEPENDENT

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Now that PIE works when U-Boot is started from ROM, let's enable
CONFIG_POSITION_INDEPENDENT, which allows to load U-Boot also via
ARM Trusted-Firmware's fip.bin to DRAM, without tweaking the
configuration.

To get a writable initial stack, we need to keep the fixed initial
stack pointer, which points to DRAM in our case.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Andre Przywara 2020-09-30 17:39:18 +01:00 committed by Tom Rini
parent f8df0560b6
commit f5cb6c3081
2 changed files with 2 additions and 0 deletions
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1
arch/arm/Kconfig
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@ -22,6 +22,7 @@ config POSITION_INDEPENDENT
config INIT_SP_RELATIVE
bool "Specify the early stack pointer relative to the .bss section"
default n if ARCH_QEMU
default y if POSITION_INDEPENDENT
help
U-Boot typically uses a hard-coded value for the stack pointer

1
configs/qemu_arm64_defconfig
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@ -1,6 +1,7 @@
CONFIG_ARM=y
CONFIG_ARCH_QEMU=y
CONFIG_NR_DRAM_BANKS=1
CONFIG_POSITION_INDEPENDENT=y
CONFIG_ENV_SIZE=0x40000
CONFIG_ENV_SECT_SIZE=0x40000
CONFIG_AHCI=y