include/asm-parisc/smp.h

   1 #ifndef __ASM_SMP_H
   2 #define __ASM_SMP_H
   3
   4
   5 #if defined(CONFIG_SMP)
   6
   7 /* Page Zero Location PDC will look for the address to branch to when we poke
   8 ** slave CPUs still in "Icache loop".
   9 */
  10 #define PDC_OS_BOOT_RENDEZVOUS     0x10
  11 #define PDC_OS_BOOT_RENDEZVOUS_HI  0x28
  12
  13 #ifndef ASSEMBLY
  14 #include <linux/bitops.h>
  15 #include <linux/threads.h>      /* for NR_CPUS */
  16 #include <linux/cpumask.h>
  17 typedef unsigned long address_t;
  18
  19 extern cpumask_t cpu_online_map;
  20
  21
  22 /*
  23  *      Private routines/data
  24  *
  25  *      physical and logical are equivalent until we support CPU hotplug.
  26  */
  27 #define cpu_number_map(cpu)     (cpu)
  28 #define cpu_logical_map(cpu)    (cpu)
  29
  30 extern void smp_send_reschedule(int cpu);
  31 extern void smp_send_all_nop(void);
  32
  33 #endif /* !ASSEMBLY */
  34
  35 /*
  36  *      This magic constant controls our willingness to transfer
  37  *      a process across CPUs. Such a transfer incurs cache and tlb
  38  *      misses. The current value is inherited from i386. Still needs
  39  *      to be tuned for parisc.
  40  */
  41
  42 #define PROC_CHANGE_PENALTY     15              /* Schedule penalty */
  43
  44 #undef ENTRY_SYS_CPUS
  45 #ifdef ENTRY_SYS_CPUS
  46 #define STATE_RENDEZVOUS                        0
  47 #define STATE_STOPPED                           1
  48 #define STATE_RUNNING                           2
  49 #define STATE_HALTED                            3
  50 #endif
  51
  52 extern unsigned long cpu_present_mask;
  53
  54 #define raw_smp_processor_id()  (current_thread_info()->cpu)
  55
  56 #else /* CONFIG_SMP */
  57
  58 static inline void smp_send_all_nop(void) { return; }
  59
  60 #endif
  61
  62 #define NO_PROC_ID              0xFF            /* No processor magic marker */
  63 #define ANY_PROC_ID             0xFF            /* Any processor magic marker */
  64 static inline int __cpu_disable (void) {
  65   return 0;
  66 }
  67 static inline void __cpu_die (unsigned int cpu) {
  68   while(1)
  69     ;
  70 }
  71 extern int __cpu_up (unsigned int cpu);
  72
  73 #endif /*  __ASM_SMP_H */