include/asm-sparc64/smp.h

   1 /* smp.h: Sparc64 specific SMP stuff.
   2  *
   3  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   4  */
   5
   6 #ifndef _SPARC64_SMP_H
   7 #define _SPARC64_SMP_H
   8
   9 #include <linux/config.h>
  10 #include <linux/threads.h>
  11 #include <asm/asi.h>
  12 #include <asm/starfire.h>
  13 #include <asm/spitfire.h>
  14
  15 #ifndef __ASSEMBLY__
  16
  17 #include <linux/cpumask.h>
  18 #include <linux/cache.h>
  19
  20 #endif /* !(__ASSEMBLY__) */
  21
  22 #ifdef CONFIG_SMP
  23
  24 #ifndef __ASSEMBLY__
  25
  26 /*
  27  *      Private routines/data
  28  */
  29
  30 #include <asm/bitops.h>
  31 #include <asm/atomic.h>
  32
  33 extern cpumask_t phys_cpu_present_map;
  34 #define cpu_possible_map phys_cpu_present_map
  35
  36 /*
  37  *      General functions that each host system must provide.
  38  */
  39
  40 static __inline__ int hard_smp_processor_id(void)
  41 {
  42         if (tlb_type == cheetah || tlb_type == cheetah_plus) {
  43                 unsigned long cfg, ver;
  44                 __asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver));
  45                 if ((ver >> 32) == 0x003e0016) {
  46                         __asm__ __volatile__("ldxa [%%g0] %1, %0"
  47                                              : "=r" (cfg)
  48                                              : "i" (ASI_JBUS_CONFIG));
  49                         return ((cfg >> 17) & 0x1f);
  50                 } else {
  51                         __asm__ __volatile__("ldxa [%%g0] %1, %0"
  52                                              : "=r" (cfg)
  53                                              : "i" (ASI_SAFARI_CONFIG));
  54                         return ((cfg >> 17) & 0x3ff);
  55                 }
  56         } else if (this_is_starfire != 0) {
  57                 return starfire_hard_smp_processor_id();
  58         } else {
  59                 unsigned long upaconfig;
  60                 __asm__ __volatile__("ldxa      [%%g0] %1, %0"
  61                                      : "=r" (upaconfig)
  62                                      : "i" (ASI_UPA_CONFIG));
  63                 return ((upaconfig >> 17) & 0x1f);
  64         }
  65 }
  66
  67 #define smp_processor_id() (current_thread_info()->cpu)
  68
  69 #endif /* !(__ASSEMBLY__) */
  70
  71 #endif /* !(CONFIG_SMP) */
  72
  73 #define NO_PROC_ID              0xFF
  74
  75 #endif /* !(_SPARC64_SMP_H) */