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 16extern struct mutex smp_cpu_state_mutex; 17extern struct save_area *zfcpdump_save_areas[NR_CPUS + 1]; 18 19extern int __cpu_up(unsigned int cpu, struct task_struct *tidle); 20 21extern void arch_send_call_function_single_ipi(int cpu); 22extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 23 24extern void smp_call_online_cpu(void (*func)(void *), void *); 25extern void smp_call_ipl_cpu(void (*func)(void *), void *); 26 27extern int smp_find_processor_id(u16 address); 28extern int smp_store_status(int cpu); 29extern int smp_vcpu_scheduled(int cpu); 30extern void smp_yield_cpu(int cpu); 31extern void smp_yield(void); 32extern void smp_stop_cpu(void); 33extern void smp_cpu_set_polarization(int cpu, int val); 34extern int smp_cpu_get_polarization(int cpu); 35 36#else /* CONFIG_SMP */ 37 38static inline void smp_call_ipl_cpu(void (*func)(void *), void *data) 39{ 40 func(data); 41} 42 43static inline void smp_call_online_cpu(void (*func)(void *), void *data) 44{ 45 func(data); 46} 47 48static inline int smp_find_processor_id(u16 address) { return 0; } 49static inline int smp_store_status(int cpu) { return 0; } 50static inline int smp_vcpu_scheduled(int cpu) { return 1; } 51static inline void smp_yield_cpu(int cpu) { } 52static inline void smp_yield(void) { } 53static inline void smp_stop_cpu(void) { } 54 55#endif /* CONFIG_SMP */ 56 57#ifdef CONFIG_HOTPLUG_CPU 58extern int smp_rescan_cpus(void); 59extern void __noreturn cpu_die(void); 60extern void __cpu_die(unsigned int cpu); 61extern int __cpu_disable(void); 62#else 63static inline int smp_rescan_cpus(void) { return 0; } 64static inline void cpu_die(void) { } 65#endif 66 67#endif /* __ASM_SMP_H */ 68