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
  12#ifndef __ASSEMBLY__
  13
  14#include <linux/cpumask.h>
  15
  16#endif /* __ASSEMBLY__ */
  17
  18#ifdef CONFIG_SMP
  19
  20#ifndef __ASSEMBLY__
  21
  22#include <asm/ptrace.h>
  23#include <asm/asi.h>
  24#include <linux/atomic.h>
  25
  26/*
  27 *      Private routines/data
  28 */
  29
  30extern unsigned char boot_cpu_id;
  31extern volatile unsigned long cpu_callin_map[NR_CPUS];
  32extern cpumask_t smp_commenced_mask;
  33extern struct linux_prom_registers smp_penguin_ctable;
  34
  35typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
  36                       unsigned long, unsigned long);
  37
  38void cpu_panic(void);
  39
  40/*
  41 *      General functions that each host system must provide.
  42 */
  43
  44void sun4m_init_smp(void);
  45void sun4d_init_smp(void);
  46
  47void smp_callin(void);
  48void smp_store_cpu_info(int);
  49
  50void smp_resched_interrupt(void);
  51void smp_call_function_single_interrupt(void);
  52void smp_call_function_interrupt(void);
  53
  54struct seq_file;
  55void smp_bogo(struct seq_file *);
  56void smp_info(struct seq_file *);
  57
  58struct sparc32_ipi_ops {
  59        void (*cross_call)(smpfunc_t func, cpumask_t mask, unsigned long arg1,
  60                           unsigned long arg2, unsigned long arg3,
  61                           unsigned long arg4);
  62        void (*resched)(int cpu);
  63        void (*single)(int cpu);
  64        void (*mask_one)(int cpu);
  65};
  66extern const struct sparc32_ipi_ops *sparc32_ipi_ops;
  67
  68static inline void xc0(smpfunc_t func)
  69{
  70        sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 0, 0, 0, 0);
  71}
  72
  73static inline void xc1(smpfunc_t func, unsigned long arg1)
  74{
  75        sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, 0, 0, 0);
  76}
  77static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
  78{
  79        sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, arg2, 0, 0);
  80}
  81
  82static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  83                       unsigned long arg3)
  84{
  85        sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
  86                                    arg1, arg2, arg3, 0);
  87}
  88
  89static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  90                       unsigned long arg3, unsigned long arg4)
  91{
  92        sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
  93                                    arg1, arg2, arg3, arg4);
  94}
  95
  96extern void arch_send_call_function_single_ipi(int cpu);
  97extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  98
  99static inline int cpu_logical_map(int cpu)
 100{
 101        return cpu;
 102}
 103
 104extern int hard_smp_processor_id(void);
 105
 106#define raw_smp_processor_id()          (current_thread_info()->cpu)
 107
 108void smp_setup_cpu_possible_map(void);
 109
 110#endif /* !(__ASSEMBLY__) */
 111
 112/* Sparc specific messages. */
 113#define MSG_CROSS_CALL         0x0005       /* run func on cpus */
 114
 115/* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
 116 * contains something other than one of these then the ipi is from
 117 * Linux's active_kernel_processor.  This facility exists so that
 118 * the boot monitor can capture all the other cpus when one catches
 119 * a watchdog reset or the user enters the monitor using L1-A keys.
 120 */
 121#define MBOX_STOPCPU          0xFB
 122#define MBOX_IDLECPU          0xFC
 123#define MBOX_IDLECPU2         0xFD
 124#define MBOX_STOPCPU2         0xFE
 125
 126#else /* SMP */
 127
 128#define hard_smp_processor_id()         0
 129#define smp_setup_cpu_possible_map() do { } while (0)
 130
 131#endif /* !(SMP) */
 132#endif /* !(_SPARC_SMP_H) */
 133