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mainboard/emulation/qemu-aarch64: Update DRAM_SIZE_MB 

DRAM_SIZE_MB should be the maximum size (255GiB / -m 261120M)
that’s possible with QEMU on AArch64 virt because it tries to search
the DRAM_SIZE_MB range to find the true memory size.

Signed-off-by: Asami Doi <d0iasm.pub@gmail.com>
Change-Id: Id479c0b18d1e1adceecdcca13e36119b95617e6d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35024
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
This commit is contained in:
Asami Doi 2019-08-22 14:11:17 +09:00 committed by Patrick Georgi
parent 06993ee729
commit a5d9e7a628
2 changed files with 4 additions and 3 deletions
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5
Documentation/mainboard/emulation/qemu-aarch64.md
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@ -7,7 +7,7 @@ as a payload for QEMU/AArch64.
```bash ```bash
qemu-system-aarch64 -bios ./build/coreboot.rom \ qemu-system-aarch64 -bios ./build/coreboot.rom \
-M virt,secure=on,virtualization=on -cpu cortex-a53 \ -M virt,secure=on,virtualization=on -cpu cortex-a53 \
-nographic -m 8912M -nographic -m 8192M
``` ```
- The default CPU in QEMU for AArch64 is a cortex-a15 which is 32-bit - The default CPU in QEMU for AArch64 is a cortex-a15 which is 32-bit
@ -17,6 +17,7 @@ have the right to access EL3/EL2 registers. You need to enable EL3/EL2
via `-machine secure=on,virtualization=on`. via `-machine secure=on,virtualization=on`.
- You need to specify the size of memory more than 544 MiB because 512 - You need to specify the size of memory more than 544 MiB because 512
MiB is reserved for the kernel. MiB is reserved for the kernel.
- The maximum size of memory is 255GiB (-m 261120).
## Building coreboot with an arbitrary FIT payload ## Building coreboot with an arbitrary FIT payload
There are 3 steps to make coreboot.rom for QEMU/AArch64. If you select There are 3 steps to make coreboot.rom for QEMU/AArch64. If you select
@ -30,7 +31,7 @@ You can get the DTB from QEMU with the following command.
``` ```
$ qemu-system-aarch64 \ $ qemu-system-aarch64 \
-M virt,dumpdtb=virt.dtb,secure=on,virtualization=on \ -M virt,dumpdtb=virt.dtb,secure=on,virtualization=on \
-cpu cortex-a53 -nographic -m 2048M -cpu cortex-a53 -nographic -m 8192M
``` ```
### 2. Build a FIT image with a DTB ### 2. Build a FIT image with a DTB

2
src/mainboard/emulation/qemu-aarch64/Kconfig
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@ -46,6 +46,6 @@ config MAINBOARD_VENDOR
config DRAM_SIZE_MB config DRAM_SIZE_MB
int int
default 1024 default 261120 # The maximum dram size is 255GiB.
endif # BOARD_EMULATION_QEMU_AARCH64 endif # BOARD_EMULATION_QEMU_AARCH64