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 unsigned char boot_cpu_id;
  34
  35 extern cpumask_t phys_cpu_present_map;
  36 #define cpu_possible_map phys_cpu_present_map
  37
  38 /*
  39  *      General functions that each host system must provide.
  40  */
  41
  42 static __inline__ int hard_smp_processor_id(void)
  43 {
  44         if (tlb_type == cheetah || tlb_type == cheetah_plus) {
  45                 unsigned long cfg, ver;
  46                 __asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver));
  47                 if ((ver >> 32) == 0x003e0016) {
  48                         __asm__ __volatile__("ldxa [%%g0] %1, %0"
  49                                              : "=r" (cfg)
  50                                              : "i" (ASI_JBUS_CONFIG));
  51                         return ((cfg >> 17) & 0x1f);
  52                 } else {
  53                         __asm__ __volatile__("ldxa [%%g0] %1, %0"
  54                                              : "=r" (cfg)
  55                                              : "i" (ASI_SAFARI_CONFIG));
  56                         return ((cfg >> 17) & 0x3ff);
  57                 }
  58         } else if (this_is_starfire != 0) {
  59                 return starfire_hard_smp_processor_id();
  60         } else {
  61                 unsigned long upaconfig;
  62                 __asm__ __volatile__("ldxa      [%%g0] %1, %0"
  63                                      : "=r" (upaconfig)
  64                                      : "i" (ASI_UPA_CONFIG));
  65                 return ((upaconfig >> 17) & 0x1f);
  66         }
  67 }
  68
  69 #define smp_processor_id() (current_thread_info()->cpu)
  70
  71 #endif /* !(__ASSEMBLY__) */
  72
  73 #endif /* !(CONFIG_SMP) */
  74
  75 #define NO_PROC_ID              0xFF
  76
  77 #endif /* !(_SPARC64_SMP_H) */