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

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* smp.h: Sparc specific SMP stuff.
   3 *
   4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   5 */
   6
   7#ifndef _SPARC_SMP_H
   8#define _SPARC_SMP_H
   9
  10#include <linux/threads.h>
  11#include <asm/head.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
  31extern unsigned char boot_cpu_id;
  32extern volatile unsigned long cpu_callin_map[NR_CPUS];
  33extern cpumask_t smp_commenced_mask;
  34extern struct linux_prom_registers smp_penguin_ctable;
  35
  36typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
  37                       unsigned long, unsigned long);
  38
  39void cpu_panic(void);
  40
  41/*
  42 *      General functions that each host system must provide.
  43 */
  44
  45void sun4m_init_smp(void);
  46void sun4d_init_smp(void);
  47
  48void smp_callin(void);
  49void smp_store_cpu_info(int);
  50
  51void smp_resched_interrupt(void);
  52void smp_call_function_single_interrupt(void);
  53void smp_call_function_interrupt(void);
  54
  55struct seq_file;
  56void smp_bogo(struct seq_file *);
  57void smp_info(struct seq_file *);
  58
  59struct sparc32_ipi_ops {
  60        void (*cross_call)(smpfunc_t func, cpumask_t mask, unsigned long arg1,
  61                           unsigned long arg2, unsigned long arg3,
  62                           unsigned long arg4);
  63        void (*resched)(int cpu);
  64        void (*single)(int cpu);
  65        void (*mask_one)(int cpu);
  66};
  67extern const struct sparc32_ipi_ops *sparc32_ipi_ops;
  68
  69static inline void xc0(smpfunc_t func)
  70{
  71        sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 0, 0, 0, 0);
  72}
  73
  74static inline void xc1(smpfunc_t func, unsigned long arg1)
  75{
  76        sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, 0, 0, 0);
  77}
  78static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
  79{
  80        sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, arg2, 0, 0);
  81}
  82
  83static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  84                       unsigned long arg3)
  85{
  86        sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
  87                                    arg1, arg2, arg3, 0);
  88}
  89
  90static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  91                       unsigned long arg3, unsigned long arg4)
  92{
  93        sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
  94                                    arg1, arg2, arg3, arg4);
  95}
  96
  97void arch_send_call_function_single_ipi(int cpu);
  98void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  99
 100static inline int cpu_logical_map(int cpu)
 101{
 102        return cpu;
 103}
 104
 105int hard_smp_processor_id(void);
 106
 107#define raw_smp_processor_id()          (current_thread_info()->cpu)
 108
 109void smp_setup_cpu_possible_map(void);
 110
 111#endif /* !(__ASSEMBLY__) */
 112
 113/* Sparc specific messages. */
 114#define MSG_CROSS_CALL         0x0005       /* run func on cpus */
 115
 116/* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
 117 * contains something other than one of these then the ipi is from
 118 * Linux's active_kernel_processor.  This facility exists so that
 119 * the boot monitor can capture all the other cpus when one catches
 120 * a watchdog reset or the user enters the monitor using L1-A keys.
 121 */
 122#define MBOX_STOPCPU          0xFB
 123#define MBOX_IDLECPU          0xFC
 124#define MBOX_IDLECPU2         0xFD
 125#define MBOX_STOPCPU2         0xFE
 126
 127#else /* SMP */
 128
 129#define hard_smp_processor_id()         0
 130#define smp_setup_cpu_possible_map() do { } while (0)
 131
 132#endif /* !(SMP) */
 133#endif /* !(_SPARC_SMP_H) */
 134