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| author | Aaron Durbin <adurbin@chromium.org> | 2014-09-17 11:43:20 -0500 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-03-28 07:05:13 +0100 |
| commit | 5add43574dc10b9df3b8d050ce9ef14540e339a8 (patch) | |
| tree | af7cfb1c5bf7b058f30887fee1b3de7eeb20f2a9 /src/arch/arm64/spintable_asm.S | |
| parent | 74ff69feefaf3a34ad458ee641c68e1b62edd8f5 (diff) | |
| download | coreboot-5add43574dc10b9df3b8d050ce9ef14540e339a8.tar.xz | |
arm64: add spin table support
There was a hacky and one-off spin table support in tegra132.
Make this support generic for all arm64 chips.
BUG=chrome-os-partner:32082
BRANCH=None
TEST=Ran with and without secure monitor booting smp into the kernel.
Change-Id: I3425ab0c30983d4c74d0aa465dda38bb2c91c83b
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 024dc3f3e5262433a56ed14934db837b5feb1748
Original-Change-Id: If12083a9afc3b2be663d36cfeed10f9b74bae3c8
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/218654
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/9084
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/arch/arm64/spintable_asm.S')
| -rw-r--r-- | src/arch/arm64/spintable_asm.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/arch/arm64/spintable_asm.S b/src/arch/arm64/spintable_asm.S new file mode 100644 index 0000000000..3066b7e679 --- /dev/null +++ b/src/arch/arm64/spintable_asm.S @@ -0,0 +1,38 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2014 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <arch/asm.h> + +ENTRY(__wait_for_spin_table_request) + /* Entry here is in EL2 with the magic address in x0. */ + mov x28, x0 +1: + ldr x27, [x28] + cmp x27, xzr + b.ne 2f + wfe + b 1b +2: + /* Entry into the kernel. */ + mov x0, xzr + mov x1, xzr + mov x2, xzr + mov x3, xzr + br x27 +ENDPROC(__wait_for_spin_table_request) |