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#ifndef __LINUX_SMP_H
#define __LINUX_SMP_H
/*
* Generic SMP support
* Alan Cox. <alan@redhat.com>
*/
#include <linux/config.h>
#ifdef CONFIG_SMP
#include <linux/kernel.h>
#include <linux/compiler.h>
#include <linux/threads.h>
#include <asm/smp.h>
#include <asm/bug.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 FASTCALL(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
*/
extern int smp_call_function (void (*func) (void *info), void *info,
int retry, int wait);
/*
* True once the per process idle is forked
*/
extern int smp_threads_ready;
extern volatile unsigned long smp_msg_data;
extern volatile int smp_src_cpu;
extern volatile int smp_msg_id;
#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 */
struct notifier_block;
/* Need to know about CPUs going up/down? */
extern int register_cpu_notifier(struct notifier_block *nb);
extern void unregister_cpu_notifier(struct notifier_block *nb);
int cpu_up(unsigned int cpu);
/*
* 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 smp_processor_id() 0
#define hard_smp_processor_id() 0
#define smp_threads_ready 1
#define smp_call_function(func,info,retry,wait) ({ 0; })
static inline void smp_send_reschedule(int cpu) { }
static inline void smp_send_reschedule_all(void) { }
#define cpu_online_map 1
#define cpu_online(cpu) ({ BUG_ON((cpu) != 0); 1; })
#define num_online_cpus() 1
#define num_booting_cpus() 1
#define cpu_possible(cpu) ({ BUG_ON((cpu) != 0); 1; })
#define smp_prepare_boot_cpu() do {} while (0)
struct notifier_block;
/* Need to know about CPUs going up/down? */
static inline int register_cpu_notifier(struct notifier_block *nb)
{
return 0;
}
static inline void unregister_cpu_notifier(struct notifier_block *nb)
{
}
#endif /* !SMP */
#define get_cpu() ({ preempt_disable(); smp_processor_id(); })
#define put_cpu() preempt_enable()
#define put_cpu_no_resched() preempt_enable_no_resched()
#endif /* __LINUX_SMP_H */
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