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. */
  18 extern 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.  */
  22 extern int __cpu_logical_map[NR_CPUS];
  23 #define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
  24
  25 enum {
  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
  34 DECLARE_PER_CPU(int, cpu_state);
  35
  36 void smp_message_recv(unsigned int msg);
  37
  38 void arch_send_call_function_single_ipi(int cpu);
  39 void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  40
  41 void native_play_dead(void);
  42 void native_cpu_die(unsigned int cpu);
  43 int native_cpu_disable(unsigned int cpu);
  44
  45 #ifdef CONFIG_HOTPLUG_CPU
  46 void play_dead_common(void);
  47 extern int __cpu_disable(void);
  48
  49 static 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
  57 static 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
  67 struct 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 */