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| author | Andrew Walbran <qwandor@google.com> | 2020-01-15 14:11:31 +0000 |
|---|---|---|
| committer | Andrew Walbran <qwandor@google.com> | 2020-01-23 10:53:44 +0000 |
| commit | 74464d5b51954b500a1a656539a88a58e70d9b8a (patch) | |
| tree | e583486803e61be9083623517922ca255f059e51 /docs | |
| parent | d81e38f66e232ddd2590f50cafe88eef52d4a752 (diff) | |
| download | platform_external_arm-trusted-firmware-74464d5b51954b500a1a656539a88a58e70d9b8a.tar.gz platform_external_arm-trusted-firmware-74464d5b51954b500a1a656539a88a58e70d9b8a.tar.bz2 platform_external_arm-trusted-firmware-74464d5b51954b500a1a656539a88a58e70d9b8a.zip | |
qemu: Support ARM_LINUX_KERNEL_AS_BL33 to pass FDT address.
This lets the Linux kernel or any other image which expects an FDT in x0 be
loaded directly as BL33 without a separate bootloader on QEMU.
Signed-off-by: Andrew Walbran <qwandor@google.com>
Change-Id: Ia8eb4710a3d97cdd877af3b8aae36a2de7cfc654
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/plat/qemu.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/plat/qemu.rst b/docs/plat/qemu.rst index 4ebe64b85..a4c5bec71 100644 --- a/docs/plat/qemu.rst +++ b/docs/plat/qemu.rst @@ -10,6 +10,10 @@ loop to be released by normal world via PSCI. BL2 edits the Flattened Device Tree, FDT, generated by QEMU at run-time to add a node describing PSCI and also enable methods for the CPUs. +If ``ARM_LINUX_KERNEL_AS_BL33`` is set to 1 then this FDT will be passed to BL33 +via register x0, as expected by a Linux kernel. This allows a Linux kernel image +to be booted directly as BL33 rather than using a bootloader. + An ARM64 defconfig v4.5 Linux kernel is known to boot, FDT doesn't need to be provided as it's generated by QEMU. |