diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2014-08-28 09:46:10 -0500 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-03-27 08:04:14 +0100 |
| commit | 127f051f86a3f3f1c1df889f2838123481a37b2f (patch) | |
| tree | 19a8211f8735673573052fe0a58de70d7aa72bac /src/soc/nvidia/tegra132/spintable.S | |
| parent | 79eb2b3ec6c0b38c6aeaf9a78ab3cb2de9cfcee7 (diff) | |
tegra132: add spin table support
Until PSCI is functional the other core still needs to be
brought up in the kernel. The kernel boots these cpus with
the spin table which is just an address in memory to monitor
a jump location.
BUG=chrome-os-partner:31545
BRANCH=None
TEST=Built and brought up secondary core in linux.
Change-Id: Iaa69110f6a647d8fd4149119d97db4fc45d7da00
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 01ca36685852bc5dd85fd4015c8a1e600e23e7ca
Original-Change-Id: Ieaf19cd70aff3e6c8de932e04b1b5aba71822a97
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/214777
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/9021
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/soc/nvidia/tegra132/spintable.S')
| -rw-r--r-- | src/soc/nvidia/tegra132/spintable.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/soc/nvidia/tegra132/spintable.S b/src/soc/nvidia/tegra132/spintable.S new file mode 100644 index 0000000000..3066b7e679 --- /dev/null +++ b/src/soc/nvidia/tegra132/spintable.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) |