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tegra132: implement smp_processor_id()

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Implement smp_processor_id() for the arm64 cores.

BUG=chrome-os-partner:31545
BRANCH=None
TEST=Built.

Change-Id: I7a1cd2f94ba4ae1854450cc60ef8a62f2457aabb
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/214664
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
This commit is contained in:
Aaron Durbin 2014-08-27 10:28:49 -05:00 • committed by chrome-internal-fetch
commit d5c5c68329
2 changed files with 28 additions and 0 deletions
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1
src/soc/nvidia/tegra132/Makefile.inc
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@ -57,6 +57,7 @@ ramstage-y += addressmap.c
ramstage-y += cbfs.c
ramstage-y += cbmem.c
ramstage-y += cpu.c
ramstage-y += cpu_lib.S
ramstage-y += timer.c
ramstage-y += clock.c
ramstage-y += soc.c

27
src/soc/nvidia/tegra132/cpu_lib.S Normal file
View file

@ -0,0 +1,27 @@
/*
* 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
*/
.text
.global smp_processor_id
smp_processor_id:
/* Core 0 and 1 are encoded in the Aff0 (7:0) field of MPIDR_EL1. */
mrs x0, mpidr_el1
uxtb w0, w0
ret