include/asm-parisc/smp.h

   1 #ifndef __ASM_SMP_H
   2 #define __ASM_SMP_H
   3
   4 #include <linux/config.h>
   5
   6 #if defined(CONFIG_SMP)
   7
   8 /* Page Zero Location PDC will look for the address to branch to when we poke
   9 ** slave CPUs still in "Icache loop".
  10 */
  11 #define PDC_OS_BOOT_RENDEZVOUS     0x10
  12 #define PDC_OS_BOOT_RENDEZVOUS_HI  0x28
  13
  14 #ifndef ASSEMBLY
  15 #include <linux/bitops.h>
  16 #include <linux/threads.h>      /* for NR_CPUS */
  17 typedef unsigned long address_t;
  18
  19 extern volatile unsigned long 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
  32 #endif /* !ASSEMBLY */
  33
  34 /*
  35  *      This magic constant controls our willingness to transfer
  36  *      a process across CPUs. Such a transfer incurs cache and tlb
  37  *      misses. The current value is inherited from i386. Still needs
  38  *      to be tuned for parisc.
  39  */
  40
  41 #define PROC_CHANGE_PENALTY     15              /* Schedule penalty */
  42
  43 #undef ENTRY_SYS_CPUS
  44 #ifdef ENTRY_SYS_CPUS
  45 #define STATE_RENDEZVOUS                        0
  46 #define STATE_STOPPED                           1
  47 #define STATE_RUNNING                           2
  48 #define STATE_HALTED                            3
  49 #endif
  50
  51 extern unsigned long cpu_present_mask;
  52
  53 #define smp_processor_id()      (current_thread_info()->cpu)
  54 #define cpu_online(cpu) (cpu_online_map & (1<<(cpu)))
  55
  56 #define cpu_possible(cpu)       (cpu_present_mask & (1<<(cpu)))
  57
  58 extern inline unsigned int num_online_cpus(void)
  59 {
  60         return hweight32(cpu_online_map);
  61 }
  62
  63 extern inline unsigned int any_online_cpu(unsigned int mask)
  64 {
  65         if (mask & cpu_online_map)
  66                 return __ffs(mask & cpu_online_map);
  67
  68         return NR_CPUS;
  69 }
  70 #endif /* CONFIG_SMP */
  71
  72 #define NO_PROC_ID              0xFF            /* No processor magic marker */
  73 #define ANY_PROC_ID             0xFF            /* Any processor magic marker */
  74
  75 #endif /*  __ASM_SMP_H */