LXR linux/arch/sparc/include/asm/smp

   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
  31extern unsigned char boot_cpu_id;
  32
  33typedef 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
  40void sun4m_init_smp(void);
  41void sun4d_init_smp(void);
  42
  43void smp_callin(void);
  44void smp_boot_cpus(void);
  45void smp_store_cpu_info(int);
  46
  47struct seq_file;
  48void smp_bogo(struct seq_file *);
  49void smp_info(struct seq_file *);
  50
  51BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, cpumask_t, unsigned long, unsigned long, unsigned long, unsigned long)
  52BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
  53BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
  54BTFIXUPDEF_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
  58static inline void xc0(smpfunc_t func) { smp_cross_call(func, cpu_online_map, 0, 0, 0, 0); }
  59static inline void xc1(smpfunc_t func, unsigned long arg1)
  60{ smp_cross_call(func, cpu_online_map, arg1, 0, 0, 0); }
  61static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
  62{ smp_cross_call(func, cpu_online_map, arg1, arg2, 0, 0); }
  63static 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); }
  66static 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
  70static 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
  76static 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
  84static inline int cpu_logical_map(int cpu)
  85{
  86        return cpu;
  87}
  88
  89static 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
 100static 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
 110static 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
 132static 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
 149void 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) */
 174