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#ifndef __LINUX_SMP_H
#define __LINUX_SMP_H
/*
* Generic SMP support
* Alan Cox. <alan@redhat.com>
*/
#ifdef __SMP__
#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 FASTCALL(smp_send_reschedule(int cpu));
/*
* 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);
/*
* 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 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*/
#define MSG_CALL_FUNCTION 0x0004 /* Call function on all other CPUs */
#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_threads_ready 1
#define kernel_lock()
#define cpu_logical_map(cpu) 0
#define smp_call_function(func,info,retry,wait)
#endif
#endif
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