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authorDavid Milosevic <David.Milosevic@9elements.com>2023-11-16 05:11:18 +0100
committerLean Sheng Tan <sheng.tan@9elements.com>2024-06-08 20:41:14 +0000
commitad83eb1ee6bb833783c4b870c86413978fb5d4ba (patch)
tree34effa2a8c4d42be4b5b06dba8ad0a7b78ef8778 /Documentation
parent91cda2af74b4142bf459f7416b8f997c7d981e13 (diff)
mainboard/emulation/qemu-sbsa: Add qemu-sbsa board
Add coreboot support for qemu's sbsa-ref (Server Base System Architecture) machine (-m sbsa-ref). The qemu-sbsa coreboot port runs on EL2 and is the payload of the EL3 firmware (Arm Trusted Firmware). Note that, coreboot expects a pointer to the FDT in x0. Make sure to configure TF-A to handoff the FDT pointer. Example qemu commandline: qemu-system-aarch64 -nographic -m 2048 -M sbsa-ref \ -pflash <path/to/TFA.fd> \ -pflash <path/to/coreboot.rom> The Documentation can be found here: Documentation/mainboard/emulation/qemu-sbsa.md Change-Id: Iacc9aaf065e0d153336cbef9a9b5b46a9eb24a53 Signed-off-by: David Milosevic <David.Milosevic@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/79086 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/mainboard/emulation/qemu-sbsa.md42
-rw-r--r--Documentation/mainboard/index.md1
2 files changed, 43 insertions, 0 deletions
diff --git a/Documentation/mainboard/emulation/qemu-sbsa.md b/Documentation/mainboard/emulation/qemu-sbsa.md
new file mode 100644
index 0000000000..abbd1895a5
--- /dev/null
+++ b/Documentation/mainboard/emulation/qemu-sbsa.md
@@ -0,0 +1,42 @@
+# QEMU SBSA emulator
+This page describes how to build and run ```coreboot``` for QEMU's sbsa-ref machine.
+The qemu-sbsa ```coreboot``` image acts as BL-3.3 for Arm Trusted Firmware (```TF-A```) and
+mainly takes care of setting up SMBIOS and ACPI tables, hence, in order to boot,
+you also need to supply a ```TF-A``` image.
+
+## Building TF-A
+
+You can build ```TF-A``` from source by fetching
+```
+https://github.com/ARM-software/arm-trusted-firmware
+```
+and building the qemu-sbsa platform
+```
+PLAT=qemu_sbsa
+```
+Upon entry, ```coreboot``` expects a FDT pointer in x0, so make sure to compile ```TF-A``` with
+```
+ARM_LINUX_KERNEL_AS_BL33=1
+```
+This will force ```TF-A``` to pass a pointer to the FDT in x0.
+
+## Building coreboot
+
+Simply select the qemu-sbsa board and, optionally, configure a payload. We recommend
+the ```leanefi``` payload. ```leanefi``` will setup a minimal set of UEFI services, just enough
+to boot into a linux kernel.
+
+## Running coreboot in QEMU
+
+Once you have obtained ```TF-A``` and ```coreboot``` images, launch qemu via
+
+```bash
+qemu-system-aarch64 -nographic -m 1024 -M sbsa-ref -pflash <path/to/TFA.fd> \
+ -pflash <path/to/coreboot.rom>
+```
+
+## LBBR bootflow
+
+arm and 9elements worked together in order to create a LBBR compliant bootflow
+consisting of ```TF-A```, ```coreboot```, ```leanefi``` and ```LinuxBoot```. A proof of concept
+can be found here https://gitlab.arm.com/systemready/firmware-build/linuxboot/lbbr-coreboot-poc
diff --git a/Documentation/mainboard/index.md b/Documentation/mainboard/index.md
index 5a80d46c14..e54b01fa38 100644
--- a/Documentation/mainboard/index.md
+++ b/Documentation/mainboard/index.md
@@ -90,6 +90,7 @@ The boards in this section are not real mainboards, but emulators.
Spike RISC-V emulator <emulation/spike-riscv.md>
QEMU RISC-V emulator <emulation/qemu-riscv.md>
QEMU AArch64 emulator <emulation/qemu-aarch64.md>
+QEMU SBSA emulator <emulation/qemu-sbsa.md>
QEMU x86 Q35 <emulation/qemu-q35.md>
QEMU x86 PC <emulation/qemu-i440fx.md>
QEMU POWER9 <emulation/qemu-power9.md>