LXR linux/arch/sh/include/asm/smp.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __ASM_SH_SMP_H
   3#define __ASM_SH_SMP_H
   4
   5#include <linux/bitops.h>
   6#include <linux/cpumask.h>
   7#include <asm/smp-ops.h>
   8
   9#ifdef CONFIG_SMP
  10
  11#include <linux/spinlock.h>
  12#include <linux/atomic.h>
  13#include <asm/current.h>
  14#include <asm/percpu.h>
  15
  16#define raw_smp_processor_id()  (current_thread_info()->cpu)
  17
  18/* Map from cpu id to sequential logical cpu number. */
  19extern int __cpu_number_map[NR_CPUS];
  20#define cpu_number_map(cpu)  __cpu_number_map[cpu]
  21
  22/* The reverse map from sequential logical cpu number to cpu id.  */
  23extern int __cpu_logical_map[NR_CPUS];
  24#define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
  25
  26enum {
  27        SMP_MSG_FUNCTION,
  28        SMP_MSG_RESCHEDULE,
  29        SMP_MSG_FUNCTION_SINGLE,
  30        SMP_MSG_TIMER,
  31
  32        SMP_MSG_NR,     /* must be last */
  33};
  34
  35DECLARE_PER_CPU(int, cpu_state);
  36
  37void smp_message_recv(unsigned int msg);
  38
  39void arch_send_call_function_single_ipi(int cpu);
  40void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  41
  42void native_play_dead(void);
  43void native_cpu_die(unsigned int cpu);
  44int native_cpu_disable(unsigned int cpu);
  45
  46#ifdef CONFIG_HOTPLUG_CPU
  47void play_dead_common(void);
  48extern int __cpu_disable(void);
  49
  50static inline void __cpu_die(unsigned int cpu)
  51{
  52        extern struct plat_smp_ops *mp_ops;     /* private */
  53
  54        mp_ops->cpu_die(cpu);
  55}
  56#endif
  57
  58static inline int hard_smp_processor_id(void)
  59{
  60        extern struct plat_smp_ops *mp_ops;     /* private */
  61
  62        if (!mp_ops)
  63                return 0;       /* boot CPU */
  64
  65        return mp_ops->smp_processor_id();
  66}
  67
  68struct of_cpu_method {
  69        const char *method;
  70        struct plat_smp_ops *ops;
  71};
  72
  73#define CPU_METHOD_OF_DECLARE(name, _method, _ops)                      \
  74        static const struct of_cpu_method __cpu_method_of_table_##name  \
  75                __used __section(__cpu_method_of_table)                 \
  76                = { .method = _method, .ops = _ops }
  77
  78#else
  79
  80#define hard_smp_processor_id() (0)
  81
  82#endif /* CONFIG_SMP */
  83
  84#endif /* __ASM_SH_SMP_H */
  85