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); 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_vcpu_scheduled(int cpu) { return 1; } 48 static inline void smp_yield_cpu(int cpu) { } 49 static inline void smp_yield(void) { } 50 static inline void smp_stop_cpu(void) { } 51 52 #endif /* CONFIG_SMP */ 53 54 #ifdef CONFIG_HOTPLUG_CPU 55 extern int smp_rescan_cpus(void); 56 extern void __noreturn cpu_die(void); 57 extern void __cpu_die(unsigned int cpu); 58 extern int __cpu_disable(void); 59 #else 60 static inline int smp_rescan_cpus(void) { return 0; } 61 static inline void cpu_die(void) { } 62 #endif 63 64 #endif /* __ASM_SMP_H */ 65