diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/mach-prima2/hotplug.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/mach-prima2/hotplug.c')
-rw-r--r-- | kernel/arch/arm/mach-prima2/hotplug.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-prima2/hotplug.c b/kernel/arch/arm/mach-prima2/hotplug.c new file mode 100644 index 000000000..0ab2f8bae --- /dev/null +++ b/kernel/arch/arm/mach-prima2/hotplug.c @@ -0,0 +1,38 @@ +/* + * CPU hotplug support for CSR Marco dual-core SMP SoCs + * + * Copyright (c) 2012 Cambridge Silicon Radio Limited, a CSR plc group company. + * + * Licensed under GPLv2 or later. + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/smp.h> + +#include <asm/smp_plat.h> + +static inline void platform_do_lowpower(unsigned int cpu) +{ + /* we put the platform to just WFI */ + for (;;) { + __asm__ __volatile__("dsb\n\t" "wfi\n\t" + : : : "memory"); + if (pen_release == cpu_logical_map(cpu)) { + /* + * OK, proper wakeup, we're done + */ + break; + } + } +} + +/* + * platform-specific code to shutdown a CPU + * + * Called with IRQs disabled + */ +void __ref sirfsoc_cpu_die(unsigned int cpu) +{ + platform_do_lowpower(cpu); +} |