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/config.h>
  10 #include <linux/threads.h>
  11 #include <asm/head.h>
  12 #include <asm/btfixup.h>
  13
  14 #ifndef __ASSEMBLY__
  15
  16 #include <linux/cpumask.h>
  17
  18 #endif /* __ASSEMBLY__ */
  19
  20 #ifdef CONFIG_SMP
  21
  22 #ifndef __ASSEMBLY__
  23
  24 #include <asm/ptrace.h>
  25 #include <asm/asi.h>
  26 #include <asm/atomic.h>
  27
  28 /*
  29  *      Private routines/data
  30  */
  31
  32 extern unsigned char boot_cpu_id;
  33 extern cpumask_t phys_cpu_present_map;
  34 #define cpu_possible_map phys_cpu_present_map
  35
  36 typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
  37                        unsigned long, unsigned long);
  38
  39 /*
  40  *      General functions that each host system must provide.
  41  */
  42
  43 void sun4m_init_smp(void);
  44 void sun4d_init_smp(void);
  45
  46 void smp_callin(void);
  47 void smp_boot_cpus(void);
  48 void smp_store_cpu_info(int);
  49
  50 struct seq_file;
  51 void smp_bogo(struct seq_file *);
  52 void smp_info(struct seq_file *);
  53
  54 BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)
  55 BTFIXUPDEF_CALL(void, smp_message_pass, int, int, unsigned long, int)
  56 BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
  57 BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
  58 BTFIXUPDEF_BLACKBOX(load_current)
  59
  60 #define smp_cross_call(func,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5)
  61 #define smp_message_pass(target,msg,data,wait) BTFIXUP_CALL(smp_message_pass)(target,msg,data,wait)
  62
  63 static inline void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); }
  64 static inline void xc1(smpfunc_t func, unsigned long arg1)
  65 { smp_cross_call(func, arg1, 0, 0, 0, 0); }
  66 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
  67 { smp_cross_call(func, arg1, arg2, 0, 0, 0); }
  68 static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  69                            unsigned long arg3)
  70 { smp_cross_call(func, arg1, arg2, arg3, 0, 0); }
  71 static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  72                            unsigned long arg3, unsigned long arg4)
  73 { smp_cross_call(func, arg1, arg2, arg3, arg4, 0); }
  74 static inline void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  75                            unsigned long arg3, unsigned long arg4, unsigned long arg5)
  76 { smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); }
  77
  78 static inline int smp_call_function(void (*func)(void *info), void *info, int nonatomic, int wait)
  79 {
  80         xc1((smpfunc_t)func, (unsigned long)info);
  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 #endif /* !(__ASSEMBLY__) */
 150
 151 /* Sparc specific messages. */
 152 #define MSG_CROSS_CALL         0x0005       /* run func on cpus */
 153
 154 /* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
 155  * contains something other than one of these then the ipi is from
 156  * Linux's active_kernel_processor.  This facility exists so that
 157  * the boot monitor can capture all the other cpus when one catches
 158  * a watchdog reset or the user enters the monitor using L1-A keys.
 159  */
 160 #define MBOX_STOPCPU          0xFB
 161 #define MBOX_IDLECPU          0xFC
 162 #define MBOX_IDLECPU2         0xFD
 163 #define MBOX_STOPCPU2         0xFE
 164
 165 #endif /* SMP */
 166
 167 #define NO_PROC_ID            0xFF
 168
 169 #endif /* !(_SPARC_SMP_H) */