diff options
| author | Neil Armstrong <narmstrong@baylibre.com> | 2016-09-09 12:23:11 +0200 |
|---|---|---|
| committer | Neil Armstrong <narmstrong@baylibre.com> | 2016-11-23 09:53:54 +0100 |
| commit | af76e806b5b72da66b7c37d792ec422bafa14c22 (patch) | |
| tree | 4c4e8d10a0a0c5c71ff20672fb90b597899ba5d5 /arch/arm/mach-oxnas/headsmp.S | |
| parent | 1001354ca34179f3db924eb66672442a173147dc (diff) | |
ARM: oxnas: Add OX820 SMP support
The Oxford Semiconductor OX820 is a ARM11MPcore based SoC sharing some
features with the OX810 earlier SoC.
This patch adds the core to wake up the second core.
Clarifications about Copyrights dates :
- hotplug.c was taken from an old versatile code by Ma Haijun and left verbatim
- headsmp.S was taken from an old versatile code and adapted by Ma Haijun
- platsmp.c is a mix from versatile code, Ma Haijun code and my code for DT
Hence the 2002/2003 ARM Coryrights and 2013 Ma Haijun Copyrights.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Diffstat (limited to 'arch/arm/mach-oxnas/headsmp.S')
| -rw-r--r-- | arch/arm/mach-oxnas/headsmp.S | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/arm/mach-oxnas/headsmp.S b/arch/arm/mach-oxnas/headsmp.S new file mode 100644 index 000000000000..25fd4f82ab3a --- /dev/null +++ b/arch/arm/mach-oxnas/headsmp.S @@ -0,0 +1,26 @@ +/* + * Copyright (C) 2013 Ma Haijun <mahaijuns@gmail.com> + * Copyright (c) 2003 ARM Limited + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/linkage.h> +#include <linux/init.h> + + __INIT + +/* + * OX820 specific entry point for secondary CPUs. + */ +ENTRY(ox820_secondary_startup) + mov r4, #0 + /* invalidate both caches and branch target cache */ + mcr p15, 0, r4, c7, c7, 0 + /* + * we've been released from the holding pen: secondary_stack + * should now contain the SVC stack for this core + */ + b secondary_startup |