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author | Ralf Baechle <ralf@linux-mips.org> | 2009-06-23 10:00:31 +0100 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2009-06-24 18:34:40 +0100 |
commit | 1b2bc75c1bde6581d2694cb3ed7fb06b69685008 (patch) | |
tree | 800fc23052bccb1fbf8acfbaabbf5648c69daa9e /arch/mips/include/asm/smp.h | |
parent | 4ac4aa5cc3b00cc558575065ae71043e92d1a69a (diff) | |
download | kernel_samsung_smdk4412-1b2bc75c1bde6581d2694cb3ed7fb06b69685008.zip kernel_samsung_smdk4412-1b2bc75c1bde6581d2694cb3ed7fb06b69685008.tar.gz kernel_samsung_smdk4412-1b2bc75c1bde6581d2694cb3ed7fb06b69685008.tar.bz2 |
MIPS: Add arch generic CPU hotplug
Each platform has to add support for CPU hotplugging itself by providing
suitable definitions for the cpu_disable and cpu_die of the smp_ops
methods and setting SYS_SUPPORTS_HOTPLUG_CPU. A platform should only set
SYS_SUPPORTS_HOTPLUG_CPU once all it's smp_ops definitions have the
necessary changes. This patch contains the changes to the dummy smp_ops
definition for uni-processor systems.
Parts of the code contributed by Cavium Inc.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/smp.h')
-rw-r--r-- | arch/mips/include/asm/smp.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/mips/include/asm/smp.h b/arch/mips/include/asm/smp.h index 2f83fa8..01f813d 100644 --- a/arch/mips/include/asm/smp.h +++ b/arch/mips/include/asm/smp.h @@ -41,6 +41,7 @@ extern int __cpu_logical_map[NR_CPUS]; /* Octeon - Tell another core to flush its icache */ #define SMP_ICACHE_FLUSH 0x4 +extern cpumask_t cpu_callin_map; extern void asmlinkage smp_bootstrap(void); @@ -56,6 +57,24 @@ static inline void smp_send_reschedule(int cpu) mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF); } +#ifdef CONFIG_HOTPLUG_CPU +static inline int __cpu_disable(void) +{ + extern struct plat_smp_ops *mp_ops; /* private */ + + return mp_ops->cpu_disable(); +} + +static inline void __cpu_die(unsigned int cpu) +{ + extern struct plat_smp_ops *mp_ops; /* private */ + + mp_ops->cpu_die(cpu); +} + +extern void play_dead(void); +#endif + extern asmlinkage void smp_call_function_interrupt(void); extern void arch_send_call_function_single_ipi(int cpu); |