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