git.dujemihanovic.xyz Git - u-boot.git/commit

author	Patrick Rudolph <patrick.rudolph@9elements.com>
	Wed, 23 Oct 2024 13:20:14 +0000 (15:20 +0200)
committer	Tom Rini <trini@konsulko.com>
	Sun, 27 Oct 2024 23:24:13 +0000 (17:24 -0600)
commit	92e02b01eceacb21c65c1aa07e3ca0695fdbaff7
tree	227c87e026f569b6295786eaba481650c6cdb606	tree \| snapshot
parent	34bfe8eff895b864247d923ce37110a9053592ee	commit \| diff

armv8: cpu: Enable ACPI parking protocol

Update the generic entry point code to support the ACPI parking protocol.
The ACPI parking protocol can be used when PSCI is not available to bring
up secondary CPU cores.

When enabled secondary CPUs will enter U-Boot proper and spin in their own
4KiB reserved memory page, which also acts as mailbox with the OS to
release the CPU.

TEST: Boots all CPUs on qemu-system-aarch64 -machine raspi4b

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Simon Glass <sjg@chromium.org>