mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
a3bc0dbc81
If we're going to implement smp_call_function_single() on three architecture with the same prototype then it should have a declaration in a non-arch-specific header file. Move it into <linux/smp.h>. Cc: Stephane Eranian <eranian@hpl.hp.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
133 lines
3.3 KiB
C
133 lines
3.3 KiB
C
#ifndef __LINUX_SMP_H
|
|
#define __LINUX_SMP_H
|
|
|
|
/*
|
|
* Generic SMP support
|
|
* Alan Cox. <alan@redhat.com>
|
|
*/
|
|
|
|
|
|
extern void cpu_idle(void);
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
#include <linux/preempt.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/compiler.h>
|
|
#include <linux/thread_info.h>
|
|
#include <asm/smp.h>
|
|
|
|
/*
|
|
* main cross-CPU interfaces, handles INIT, TLB flush, STOP, etc.
|
|
* (defined in asm header):
|
|
*/
|
|
|
|
/*
|
|
* stops all CPUs but the current one:
|
|
*/
|
|
extern void smp_send_stop(void);
|
|
|
|
/*
|
|
* sends a 'reschedule' event to another CPU:
|
|
*/
|
|
extern void smp_send_reschedule(int cpu);
|
|
|
|
|
|
/*
|
|
* Prepare machine for booting other CPUs.
|
|
*/
|
|
extern void smp_prepare_cpus(unsigned int max_cpus);
|
|
|
|
/*
|
|
* Bring a CPU up
|
|
*/
|
|
extern int __cpu_up(unsigned int cpunum);
|
|
|
|
/*
|
|
* Final polishing of CPUs
|
|
*/
|
|
extern void smp_cpus_done(unsigned int max_cpus);
|
|
|
|
/*
|
|
* Call a function on all other processors
|
|
*/
|
|
int smp_call_function(void(*func)(void *info), void *info, int retry, int wait);
|
|
|
|
int smp_call_function_single(int cpuid, void (*func) (void *info), void *info,
|
|
int retry, int wait);
|
|
|
|
/*
|
|
* Call a function on all processors
|
|
*/
|
|
int on_each_cpu(void (*func) (void *info), void *info, int retry, int wait);
|
|
|
|
#define MSG_ALL_BUT_SELF 0x8000 /* Assume <32768 CPU's */
|
|
#define MSG_ALL 0x8001
|
|
|
|
#define MSG_INVALIDATE_TLB 0x0001 /* Remote processor TLB invalidate */
|
|
#define MSG_STOP_CPU 0x0002 /* Sent to shut down slave CPU's
|
|
* when rebooting
|
|
*/
|
|
#define MSG_RESCHEDULE 0x0003 /* Reschedule request from master CPU*/
|
|
#define MSG_CALL_FUNCTION 0x0004 /* Call function on all other CPUs */
|
|
|
|
/*
|
|
* Mark the boot cpu "online" so that it can call console drivers in
|
|
* printk() and can access its per-cpu storage.
|
|
*/
|
|
void smp_prepare_boot_cpu(void);
|
|
|
|
#else /* !SMP */
|
|
|
|
/*
|
|
* These macros fold the SMP functionality into a single CPU system
|
|
*/
|
|
#define raw_smp_processor_id() 0
|
|
#define hard_smp_processor_id() 0
|
|
static inline int up_smp_call_function(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#define smp_call_function(func,info,retry,wait) (up_smp_call_function())
|
|
#define on_each_cpu(func,info,retry,wait) \
|
|
({ \
|
|
local_irq_disable(); \
|
|
func(info); \
|
|
local_irq_enable(); \
|
|
0; \
|
|
})
|
|
static inline void smp_send_reschedule(int cpu) { }
|
|
#define num_booting_cpus() 1
|
|
#define smp_prepare_boot_cpu() do {} while (0)
|
|
|
|
#endif /* !SMP */
|
|
|
|
/*
|
|
* smp_processor_id(): get the current CPU ID.
|
|
*
|
|
* if DEBUG_PREEMPT is enabled the we check whether it is
|
|
* used in a preemption-safe way. (smp_processor_id() is safe
|
|
* if it's used in a preemption-off critical section, or in
|
|
* a thread that is bound to the current CPU.)
|
|
*
|
|
* NOTE: raw_smp_processor_id() is for internal use only
|
|
* (smp_processor_id() is the preferred variant), but in rare
|
|
* instances it might also be used to turn off false positives
|
|
* (i.e. smp_processor_id() use that the debugging code reports but
|
|
* which use for some reason is legal). Don't use this to hack around
|
|
* the warning message, as your code might not work under PREEMPT.
|
|
*/
|
|
#ifdef CONFIG_DEBUG_PREEMPT
|
|
extern unsigned int debug_smp_processor_id(void);
|
|
# define smp_processor_id() debug_smp_processor_id()
|
|
#else
|
|
# define smp_processor_id() raw_smp_processor_id()
|
|
#endif
|
|
|
|
#define get_cpu() ({ preempt_disable(); smp_processor_id(); })
|
|
#define put_cpu() preempt_enable()
|
|
#define put_cpu_no_resched() preempt_enable_no_resched()
|
|
|
|
void smp_setup_processor_id(void);
|
|
|
|
#endif /* __LINUX_SMP_H */
|