arch/s390/include/asm/smp.h

   1 /*
   2  *    Copyright IBM Corp. 1999, 2012
   3  *    Author(s): Denis Joseph Barrow,
   4  *               Martin Schwidefsky <schwidefsky@de.ibm.com>,
   5  *               Heiko Carstens <heiko.carstens@de.ibm.com>,
   6  */
   7 #ifndef __ASM_SMP_H
   8 #define __ASM_SMP_H
   9
  10 #ifdef CONFIG_SMP
  11
  12 #include <asm/lowcore.h>
  13
  14 #define raw_smp_processor_id()  (S390_lowcore.cpu_nr)
  15
  16 extern struct mutex smp_cpu_state_mutex;
  17 extern struct save_area *zfcpdump_save_areas[NR_CPUS + 1];
  18
  19 extern int __cpu_up(unsigned int cpu, struct task_struct *tidle);
  20
  21 extern void arch_send_call_function_single_ipi(int cpu);
  22 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  23
  24 extern void smp_call_online_cpu(void (*func)(void *), void *);
  25 extern void smp_call_ipl_cpu(void (*func)(void *), void *);
  26
  27 extern int smp_find_processor_id(u16 address);
  28 extern int smp_store_status(int cpu);
  29 extern int smp_vcpu_scheduled(int cpu);
  30 extern void smp_yield_cpu(int cpu);
  31 extern void smp_yield(void);
  32 extern void smp_stop_cpu(void);
  33
  34 #else /* CONFIG_SMP */
  35
  36 static inline void smp_call_ipl_cpu(void (*func)(void *), void *data)
  37 {
  38         func(data);
  39 }
  40
  41 static inline void smp_call_online_cpu(void (*func)(void *), void *data)
  42 {
  43         func(data);
  44 }
  45
  46 static inline int smp_find_processor_id(int address) { return 0; }
  47 static inline int smp_store_status(int cpu) { return 0; }
  48 static inline int smp_vcpu_scheduled(int cpu) { return 1; }
  49 static inline void smp_yield_cpu(int cpu) { }
  50 static inline void smp_yield(void) { }
  51 static inline void smp_stop_cpu(void) { }
  52
  53 #endif /* CONFIG_SMP */
  54
  55 #ifdef CONFIG_HOTPLUG_CPU
  56 extern int smp_rescan_cpus(void);
  57 extern void __noreturn cpu_die(void);
  58 extern void __cpu_die(unsigned int cpu);
  59 extern int __cpu_disable(void);
  60 #else
  61 static inline int smp_rescan_cpus(void) { return 0; }
  62 static inline void cpu_die(void) { }
  63 #endif
  64
  65 #endif /* __ASM_SMP_H */