include/asm-sparc/smp.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, unsigned long, 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,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5)
  59
  60 static inline void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); }
  61 static inline void xc1(smpfunc_t func, unsigned long arg1)
  62 { smp_cross_call(func, arg1, 0, 0, 0, 0); }
  63 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
  64 { smp_cross_call(func, arg1, arg2, 0, 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, arg1, arg2, arg3, 0, 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, arg1, arg2, arg3, arg4, 0); }
  71 static inline void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  72                            unsigned long arg3, unsigned long arg4, unsigned long arg5)
  73 { smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); }
  74
  75 static inline int smp_call_function(void (*func)(void *info), void *info, int nonatomic, int wait)
  76 {
  77         xc1((smpfunc_t)func, (unsigned long)info);
  78         return 0;
  79 }
  80
  81 static inline int cpu_logical_map(int cpu)
  82 {
  83         return cpu;
  84 }
  85
  86 static inline int hard_smp4m_processor_id(void)
  87 {
  88         int cpuid;
  89
  90         __asm__ __volatile__("rd %%tbr, %0\n\t"
  91                              "srl %0, 12, %0\n\t"
  92                              "and %0, 3, %0\n\t" :
  93                              "=&r" (cpuid));
  94         return cpuid;
  95 }
  96
  97 static inline int hard_smp4d_processor_id(void)
  98 {
  99         int cpuid;
 100
 101         __asm__ __volatile__("lda [%%g0] %1, %0\n\t" :
 102                              "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1));
 103         return cpuid;
 104 }
 105
 106 #ifndef MODULE
 107 static inline int hard_smp_processor_id(void)
 108 {
 109         int cpuid;
 110
 111         /* Black box - sun4m
 112                 __asm__ __volatile__("rd %%tbr, %0\n\t"
 113                                      "srl %0, 12, %0\n\t"
 114                                      "and %0, 3, %0\n\t" :
 115                                      "=&r" (cpuid));
 116                      - sun4d
 117                 __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t"
 118                                      "nop; nop" :
 119                                      "=&r" (cpuid));
 120            See btfixup.h and btfixupprep.c to understand how a blackbox works.
 121          */
 122         __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t"
 123                              "sethi %%hi(boot_cpu_id), %0\n\t"
 124                              "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" :
 125                              "=&r" (cpuid));
 126         return cpuid;
 127 }
 128 #else
 129 static inline int hard_smp_processor_id(void)
 130 {
 131         int cpuid;
 132
 133         __asm__ __volatile__("mov %%o7, %%g1\n\t"
 134                              "call ___f___hard_smp_processor_id\n\t"
 135                              " nop\n\t"
 136                              "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2");
 137         return cpuid;
 138 }
 139 #endif
 140
 141 #define raw_smp_processor_id()          (current_thread_info()->cpu)
 142
 143 #define prof_multiplier(__cpu)          cpu_data(__cpu).multiplier
 144 #define prof_counter(__cpu)             cpu_data(__cpu).counter
 145
 146 void smp_setup_cpu_possible_map(void);
 147
 148 #endif /* !(__ASSEMBLY__) */
 149
 150 /* Sparc specific messages. */
 151 #define MSG_CROSS_CALL         0x0005       /* run func on cpus */
 152
 153 /* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
 154  * contains something other than one of these then the ipi is from
 155  * Linux's active_kernel_processor.  This facility exists so that
 156  * the boot monitor can capture all the other cpus when one catches
 157  * a watchdog reset or the user enters the monitor using L1-A keys.
 158  */
 159 #define MBOX_STOPCPU          0xFB
 160 #define MBOX_IDLECPU          0xFC
 161 #define MBOX_IDLECPU2         0xFD
 162 #define MBOX_STOPCPU2         0xFE
 163
 164 #else /* SMP */
 165
 166 #define hard_smp_processor_id()         0
 167 #define smp_setup_cpu_possible_map() do { } while (0)
 168
 169 #endif /* !(SMP) */
 170
 171 #define NO_PROC_ID            0xFF
 172
 173 #endif /* !(_SPARC_SMP_H) */