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#ifndef __LINUX_SMP_H
#define __LINUX_SMP_H
/*
* Generic SMP support
* Alan Cox. <alan@cymru.net>
*/
#ifdef __SMP__
#include <asm/smp.h>
/*
* main IPI interface, handles INIT, TLB flush, STOP, etc.:
*/
extern void smp_message_pass(int target, int msg, unsigned long data, int wait);
/*
* Boot processor call to load the other CPU's
*/
extern void smp_boot_cpus(void);
/*
* Processor call in. Must hold processors until ..
*/
extern void smp_callin(void);
/*
* Multiprocessors may now schedule
*/
extern void smp_commence(void);
/*
* True once the per process idle is forked
*/
extern int smp_threads_ready;
extern int smp_num_cpus;
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 */
#else
/*
* These macros fold the SMP functionality into a single CPU system
*/
#define smp_num_cpus 1
#define smp_processor_id() 0
#define hard_smp_processor_id() 0
#define smp_message_pass(t,m,d,w)
#define smp_threads_ready 1
#define kernel_lock()
#endif
#endif
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