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