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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