arch/sparc/include/asm/smp_32.h

   1 /* smp.h: Sparc specific SMP stuff.
   2  *
   3  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   4  */
   5
   6 #ifndef _SPARC_SMP_H
   7 #define _SPARC_SMP_H
   8
   9 #include <linux/threads.h>
  10 #include <asm/head.h>
  11 #include <asm/btfixup.h>
  12
  13 #ifndef __ASSEMBLY__
  14
  15 #include <linux/cpumask.h>
  16
  17 #endif /* __ASSEMBLY__ */
  18
  19 #ifdef CONFIG_SMP
  20
  21 #ifndef __ASSEMBLY__
  22
  23 #include <asm/ptrace.h>
  24 #include <asm/asi.h>
  25 #include <asm/atomic.h>
  26
  27 /*
  28  *      Private routines/data
  29  */
  30
  31 extern unsigned char boot_cpu_id;
  32
  33 typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
  34                        unsigned long, unsigned long);
  35
  36 /*
  37  *      General functions that each host system must provide.
  38  */
  39
  40 void sun4m_init_smp(void);
  41 void sun4d_init_smp(void);
  42
  43 void smp_callin(void);
  44 void smp_boot_cpus(void);
  45 void smp_store_cpu_info(int);
  46
  47 struct seq_file;
  48 void smp_bogo(struct seq_file *);
  49 void smp_info(struct seq_file *);
  50
  51 BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, cpumask_t, unsigned long, unsigned long, unsigned long, unsigned long)
  52 BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
  53 BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
  54 BTFIXUPDEF_BLACKBOX(load_current)
  55
  56 #define smp_cross_call(func,mask,arg1,arg2,arg3,arg4) BTFIXUP_CALL(smp_cross_call)(func,mask,arg1,arg2,arg3,arg4)
  57
  58 static inline void xc0(smpfunc_t func) { smp_cross_call(func, cpu_online_map, 0, 0, 0, 0); }
  59 static inline void xc1(smpfunc_t func, unsigned long arg1)
  60 { smp_cross_call(func, cpu_online_map, arg1, 0, 0, 0); }
  61 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
  62 { smp_cross_call(func, cpu_online_map, arg1, arg2, 0, 0); }
  63 static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  64                            unsigned long arg3)
  65 { smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, 0); }
  66 static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  67                            unsigned long arg3, unsigned long arg4)
  68 { smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, arg4); }
  69
  70 static inline int smp_call_function(void (*func)(void *info), void *info, int wait)
  71 {
  72         xc1((smpfunc_t)func, (unsigned long)info);
  73         return 0;
  74 }
  75
  76 static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
  77                                            void *info, int wait)
  78 {
  79         smp_cross_call((smpfunc_t)func, cpumask_of_cpu(cpuid),
  80                        (unsigned long) info, 0, 0, 0);
  81         return 0;
  82 }
  83
  84 static inline int cpu_logical_map(int cpu)
  85 {
  86         return cpu;
  87 }
  88
  89 static inline int hard_smp4m_processor_id(void)
  90 {
  91         int cpuid;
  92
  93         __asm__ __volatile__("rd %%tbr, %0\n\t"
  94                              "srl %0, 12, %0\n\t"
  95                              "and %0, 3, %0\n\t" :
  96                              "=&r" (cpuid));
  97         return cpuid;
  98 }
  99
 100 static inline int hard_smp4d_processor_id(void)
 101 {
 102         int cpuid;
 103
 104         __asm__ __volatile__("lda [%%g0] %1, %0\n\t" :
 105                              "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1));
 106         return cpuid;
 107 }
 108
 109 #ifndef MODULE
 110 static inline int hard_smp_processor_id(void)
 111 {
 112         int cpuid;
 113
 114         /* Black box - sun4m
 115                 __asm__ __volatile__("rd %%tbr, %0\n\t"
 116                                      "srl %0, 12, %0\n\t"
 117                                      "and %0, 3, %0\n\t" :
 118                                      "=&r" (cpuid));
 119                      - sun4d
 120                 __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t"
 121                                      "nop; nop" :
 122                                      "=&r" (cpuid));
 123            See btfixup.h and btfixupprep.c to understand how a blackbox works.
 124          */
 125         __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t"
 126                              "sethi %%hi(boot_cpu_id), %0\n\t"
 127                              "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" :
 128                              "=&r" (cpuid));
 129         return cpuid;
 130 }
 131 #else
 132 static inline int hard_smp_processor_id(void)
 133 {
 134         int cpuid;
 135
 136         __asm__ __volatile__("mov %%o7, %%g1\n\t"
 137                              "call ___f___hard_smp_processor_id\n\t"
 138                              " nop\n\t"
 139                              "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2");
 140         return cpuid;
 141 }
 142 #endif
 143
 144 #define raw_smp_processor_id()          (current_thread_info()->cpu)
 145
 146 #define prof_multiplier(__cpu)          cpu_data(__cpu).multiplier
 147 #define prof_counter(__cpu)             cpu_data(__cpu).counter
 148
 149 void smp_setup_cpu_possible_map(void);
 150
 151 #endif /* !(__ASSEMBLY__) */
 152
 153 /* Sparc specific messages. */
 154 #define MSG_CROSS_CALL         0x0005       /* run func on cpus */
 155
 156 /* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
 157  * contains something other than one of these then the ipi is from
 158  * Linux's active_kernel_processor.  This facility exists so that
 159  * the boot monitor can capture all the other cpus when one catches
 160  * a watchdog reset or the user enters the monitor using L1-A keys.
 161  */
 162 #define MBOX_STOPCPU          0xFB
 163 #define MBOX_IDLECPU          0xFC
 164 #define MBOX_IDLECPU2         0xFD
 165 #define MBOX_STOPCPU2         0xFE
 166
 167 #else /* SMP */
 168
 169 #define hard_smp_processor_id()         0
 170 #define smp_setup_cpu_possible_map() do { } while (0)
 171
 172 #endif /* !(SMP) */
 173 #endif /* !(_SPARC_SMP_H) */