include/linux/smp.h

/* */
   1 #ifndef __LINUX_SMP_H
   2 #define __LINUX_SMP_H
   3 
   4 /*
   5  *      Generic SMP support
   6  *              Alan Cox. <alan@cymru.net>
   7  */
   8 
   9 #ifdef __SMP__
  10 #include <asm/smp.h>
  11  
  12 extern void smp_message_pass(int target, int msg, unsigned long data, int wait);
  13 extern void smp_boot_cpus(void);                /* Boot processor call to load the other CPU's */
  14 extern void smp_callin(void);                   /* Processor call in. Must hold processors until .. */
  15 extern void smp_commence(void);                 /* Multiprocessors may now schedule */
  16 extern int smp_num_cpus;
  17 extern int smp_threads_ready;                   /* True once the per process idle is forked */
  18 #ifdef __SMP_PROF__
  19 extern volatile unsigned long smp_spins[NR_CPUS];       /* count of interrupt spins */
  20 extern volatile unsigned long smp_spins_sys_idle[];     /* count of idle spins */
  21 extern volatile unsigned long smp_spins_syscall[];      /* count of syscall spins */
  22 extern volatile unsigned long smp_spins_syscall_cur[];  /* count of syscall spins for the current
  23                                                            call */
  24 extern volatile unsigned long smp_idle_count[1+NR_CPUS];/* count idle ticks */
  25 extern volatile unsigned long smp_idle_map;             /* map with idle cpus */
  26 #else
  27 extern volatile unsigned long smp_spins;
  28 #endif
  29 
  30 
  31 extern volatile unsigned long smp_msg_data;
  32 extern volatile int smp_src_cpu;
  33 extern volatile int smp_msg_id;
  34 
  35 #define MSG_ALL_BUT_SELF        0x8000          /* Assume <32768 CPU's */
  36 #define MSG_ALL                 0x8001
  37 
  38 #define MSG_INVALIDATE_TLB      0x0001          /* Remote processor TLB invalidate */
  39 #define MSG_STOP_CPU            0x0002          /* Sent to shut down slave CPU's when rebooting */
  40 #define MSG_RESCHEDULE          0x0003          /* Reschedule request from master CPU */
  41 
  42 #else
  43 
  44 /*
  45  *      These macros fold the SMP functionality into a single CPU system
  46  */
  47  
  48 #define smp_num_cpus                    1
  49 #define smp_processor_id()              0
  50 #define smp_message_pass(t,m,d,w)       
  51 #define smp_threads_ready               1
  52 #define kernel_lock()
  53 #endif
  54 #endif
/* */
root/include/linux/smp.h

INCLUDED FROM
