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 <linux/atomic.h>
  26
  27 /*
  28  *      Private routines/data
  29  */
  30
  31 extern unsigned char boot_cpu_id;
  32 extern volatile unsigned long cpu_callin_map[NR_CPUS];
  33 extern cpumask_t smp_commenced_mask;
  34 extern struct linux_prom_registers smp_penguin_ctable;
  35
  36 typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
  37                        unsigned long, unsigned long);
  38
  39 void cpu_panic(void);
  40 extern void smp4m_irq_rotate(int cpu);
  41
  42 /*
  43  *      General functions that each host system must provide.
  44  */
  45
  46 void sun4m_init_smp(void);
  47 void sun4d_init_smp(void);
  48
  49 void smp_callin(void);
  50 void smp_boot_cpus(void);
  51 void smp_store_cpu_info(int);
  52
  53 void smp_resched_interrupt(void);
  54 void smp_call_function_single_interrupt(void);
  55 void smp_call_function_interrupt(void);
  56
  57 struct seq_file;
  58 void smp_bogo(struct seq_file *);
  59 void smp_info(struct seq_file *);
  60
  61 BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, cpumask_t, unsigned long, unsigned long, unsigned long, unsigned long)
  62 BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
  63 BTFIXUPDEF_CALL(void, smp_ipi_resched, int);
  64 BTFIXUPDEF_CALL(void, smp_ipi_single, int);
  65 BTFIXUPDEF_CALL(void, smp_ipi_mask_one, int);
  66 BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
  67 BTFIXUPDEF_BLACKBOX(load_current)
  68
  69 #define smp_cross_call(func,mask,arg1,arg2,arg3,arg4) BTFIXUP_CALL(smp_cross_call)(func,mask,arg1,arg2,arg3,arg4)
  70
  71 static inline void xc0(smpfunc_t func) { smp_cross_call(func, *cpu_online_mask, 0, 0, 0, 0); }
  72 static inline void xc1(smpfunc_t func, unsigned long arg1)
  73 { smp_cross_call(func, *cpu_online_mask, arg1, 0, 0, 0); }
  74 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
  75 { smp_cross_call(func, *cpu_online_mask, arg1, arg2, 0, 0); }
  76 static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  77                            unsigned long arg3)
  78 { smp_cross_call(func, *cpu_online_mask, arg1, arg2, arg3, 0); }
  79 static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  80                            unsigned long arg3, unsigned long arg4)
  81 { smp_cross_call(func, *cpu_online_mask, arg1, arg2, arg3, arg4); }
  82
  83 extern void arch_send_call_function_single_ipi(int cpu);
  84 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  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 extern inline int hard_smpleon_processor_id(void)
 112 {
 113         int cpuid;
 114         __asm__ __volatile__("rd     %%asr17,%0\n\t"
 115                              "srl    %0,28,%0" :
 116                              "=&r" (cpuid) : );
 117         return cpuid;
 118 }
 119
 120 #ifndef MODULE
 121 static inline int hard_smp_processor_id(void)
 122 {
 123         int cpuid;
 124
 125         /* Black box - sun4m
 126                 __asm__ __volatile__("rd %%tbr, %0\n\t"
 127                                      "srl %0, 12, %0\n\t"
 128                                      "and %0, 3, %0\n\t" :
 129                                      "=&r" (cpuid));
 130                      - sun4d
 131                 __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t"
 132                                      "nop; nop" :
 133                                      "=&r" (cpuid));
 134                      - leon
 135                 __asm__ __volatile__(   "rd %asr17, %0\n\t"
 136                                         "srl %0, 0x1c, %0\n\t"
 137                                         "nop\n\t" :
 138                                         "=&r" (cpuid));
 139            See btfixup.h and btfixupprep.c to understand how a blackbox works.
 140          */
 141         __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t"
 142                              "sethi %%hi(boot_cpu_id), %0\n\t"
 143                              "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" :
 144                              "=&r" (cpuid));
 145         return cpuid;
 146 }
 147 #else
 148 static inline int hard_smp_processor_id(void)
 149 {
 150         int cpuid;
 151
 152         __asm__ __volatile__("mov %%o7, %%g1\n\t"
 153                              "call ___f___hard_smp_processor_id\n\t"
 154                              " nop\n\t"
 155                              "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2");
 156         return cpuid;
 157 }
 158 #endif
 159
 160 #define raw_smp_processor_id()          (current_thread_info()->cpu)
 161
 162 #define prof_multiplier(__cpu)          cpu_data(__cpu).multiplier
 163 #define prof_counter(__cpu)             cpu_data(__cpu).counter
 164
 165 void smp_setup_cpu_possible_map(void);
 166
 167 #endif /* !(__ASSEMBLY__) */
 168
 169 /* Sparc specific messages. */
 170 #define MSG_CROSS_CALL         0x0005       /* run func on cpus */
 171
 172 /* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
 173  * contains something other than one of these then the ipi is from
 174  * Linux's active_kernel_processor.  This facility exists so that
 175  * the boot monitor can capture all the other cpus when one catches
 176  * a watchdog reset or the user enters the monitor using L1-A keys.
 177  */
 178 #define MBOX_STOPCPU          0xFB
 179 #define MBOX_IDLECPU          0xFC
 180 #define MBOX_IDLECPU2         0xFD
 181 #define MBOX_STOPCPU2         0xFE
 182
 183 #else /* SMP */
 184
 185 #define hard_smp_processor_id()         0
 186 #define smp_setup_cpu_possible_map() do { } while (0)
 187
 188 #endif /* !(SMP) */
 189 #endif /* !(_SPARC_SMP_H) */