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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>
extern void smp_message_pass(int target, int msg, unsigned long data, int wait);
extern void smp_boot_cpus(void); /* Boot processor call to load the other CPU's */
extern void smp_callin(void); /* Processor call in. Must hold processors until .. */
extern void smp_commence(void); /* Multiprocessors may now schedule */
extern int smp_num_cpus;
extern int smp_threads_ready; /* True once the per process idle is forked */
#ifdef __SMP_PROF__
extern volatile unsigned long smp_spins[NR_CPUS]; /* count of interrupt spins */
extern volatile unsigned long smp_spins_sys_idle[]; /* count of idle spins */
extern volatile unsigned long smp_spins_syscall[]; /* count of syscall spins */
extern volatile unsigned long smp_spins_syscall_cur[]; /* count of syscall spins for the current
call */
extern volatile unsigned long smp_idle_count[1+NR_CPUS];/* count idle ticks */
extern volatile unsigned long smp_idle_map; /* map with idle cpus */
#else
extern volatile unsigned long smp_spins;
#endif
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 smp_message_pass(t,m,d,w)
#define smp_threads_ready 1
#define kernel_lock()
#endif
#endif
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