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 extern cpumask_t phys_cpu_present_map;
  33 #define cpu_possible_map phys_cpu_present_map
  34
  35 typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
  36                        unsigned long, unsigned long);
  37
  38 /*
  39  *      General functions that each host system must provide.
  40  */
  41
  42 void sun4m_init_smp(void);
  43 void sun4d_init_smp(void);
  44
  45 void smp_callin(void);
  46 void smp_boot_cpus(void);
  47 void smp_store_cpu_info(int);
  48
  49 struct seq_file;
  50 void smp_bogo(struct seq_file *);
  51 void smp_info(struct seq_file *);
  52
  53 BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, cpumask_t, unsigned long, unsigned long, unsigned long, unsigned long)
  54 BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
  55 BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
  56 BTFIXUPDEF_BLACKBOX(load_current)
  57
  58 #define smp_cross_call(func,mask,arg1,arg2,arg3,arg4) BTFIXUP_CALL(smp_cross_call)(func,mask,arg1,arg2,arg3,arg4)
  59
  60 static inline void xc0(smpfunc_t func) { smp_cross_call(func, cpu_online_map, 0, 0, 0, 0); }
  61 static inline void xc1(smpfunc_t func, unsigned long arg1)
  62 { smp_cross_call(func, cpu_online_map, arg1, 0, 0, 0); }
  63 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
  64 { smp_cross_call(func, cpu_online_map, arg1, arg2, 0, 0); }
  65 static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  66                            unsigned long arg3)
  67 { smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, 0); }
  68 static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  69                            unsigned long arg3, unsigned long arg4)
  70 { smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, arg4); }
  71
  72 static inline int smp_call_function(void (*func)(void *info), void *info, int wait)
  73 {
  74         xc1((smpfunc_t)func, (unsigned long)info);
  75         return 0;
  76 }
  77
  78 static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
  79                                            void *info, int wait)
  80 {
  81         smp_cross_call((smpfunc_t)func, cpumask_of_cpu(cpuid),
  82                        (unsigned long) info, 0, 0, 0);
  83         return 0;
  84 }
  85
  86 static inline int cpu_logical_map(int cpu)
  87 {
  88         return cpu;
  89 }
  90
  91 static inline int hard_smp4m_processor_id(void)
  92 {
  93         int cpuid;
  94
  95         __asm__ __volatile__("rd %%tbr, %0\n\t"
  96                              "srl %0, 12, %0\n\t"
  97                              "and %0, 3, %0\n\t" :
  98                              "=&r" (cpuid));
  99         return cpuid;
 100 }
 101
 102 static inline int hard_smp4d_processor_id(void)
 103 {
 104         int cpuid;
 105
 106         __asm__ __volatile__("lda [%%g0] %1, %0\n\t" :
 107                              "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1));
 108         return cpuid;
 109 }
 110
 111 #ifndef MODULE
 112 static inline int hard_smp_processor_id(void)
 113 {
 114         int cpuid;
 115
 116         /* Black box - sun4m
 117                 __asm__ __volatile__("rd %%tbr, %0\n\t"
 118                                      "srl %0, 12, %0\n\t"
 119                                      "and %0, 3, %0\n\t" :
 120                                      "=&r" (cpuid));
 121                      - sun4d
 122                 __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t"
 123                                      "nop; nop" :
 124                                      "=&r" (cpuid));
 125            See btfixup.h and btfixupprep.c to understand how a blackbox works.
 126          */
 127         __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t"
 128                              "sethi %%hi(boot_cpu_id), %0\n\t"
 129                              "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" :
 130                              "=&r" (cpuid));
 131         return cpuid;
 132 }
 133 #else
 134 static inline int hard_smp_processor_id(void)
 135 {
 136         int cpuid;
 137
 138         __asm__ __volatile__("mov %%o7, %%g1\n\t"
 139                              "call ___f___hard_smp_processor_id\n\t"
 140                              " nop\n\t"
 141                              "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2");
 142         return cpuid;
 143 }
 144 #endif
 145
 146 #define raw_smp_processor_id()          (current_thread_info()->cpu)
 147
 148 #define prof_multiplier(__cpu)          cpu_data(__cpu).multiplier
 149 #define prof_counter(__cpu)             cpu_data(__cpu).counter
 150
 151 void smp_setup_cpu_possible_map(void);
 152
 153 #endif /* !(__ASSEMBLY__) */
 154
 155 /* Sparc specific messages. */
 156 #define MSG_CROSS_CALL         0x0005       /* run func on cpus */
 157
 158 /* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
 159  * contains something other than one of these then the ipi is from
 160  * Linux's active_kernel_processor.  This facility exists so that
 161  * the boot monitor can capture all the other cpus when one catches
 162  * a watchdog reset or the user enters the monitor using L1-A keys.
 163  */
 164 #define MBOX_STOPCPU          0xFB
 165 #define MBOX_IDLECPU          0xFC
 166 #define MBOX_IDLECPU2         0xFD
 167 #define MBOX_STOPCPU2         0xFE
 168
 169 #else /* SMP */
 170
 171 #define hard_smp_processor_id()         0
 172 #define smp_setup_cpu_possible_map() do { } while (0)
 173
 174 #endif /* !(SMP) */
 175
 176 #define NO_PROC_ID            0xFF
 177
 178 #endif /* !(_SPARC_SMP_H) */