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smp.h
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1 /*
2  * Copyright IBM Corp. 1999, 2012
3  * Author(s): Denis Joseph Barrow,
4  * Martin Schwidefsky <[email protected]>,
5  * Heiko Carstens <[email protected]>,
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 
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 
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 extern void smp_cpu_set_polarization(int cpu, int val);
34 extern int smp_cpu_get_polarization(int cpu);
35 
36 #else /* CONFIG_SMP */
37 
38 static inline void smp_call_ipl_cpu(void (*func)(void *), void *data)
39 {
40  func(data);
41 }
42 
43 static inline void smp_call_online_cpu(void (*func)(void *), void *data)
44 {
45  func(data);
46 }
47 
48 static inline int smp_find_processor_id(u16 address) { return 0; }
49 static inline int smp_store_status(int cpu) { return 0; }
50 static inline int smp_vcpu_scheduled(int cpu) { return 1; }
51 static inline void smp_yield_cpu(int cpu) { }
52 static inline void smp_yield(void) { }
53 static inline void smp_stop_cpu(void) { }
54 
55 #endif /* CONFIG_SMP */
56 
57 #ifdef CONFIG_HOTPLUG_CPU
58 extern int smp_rescan_cpus(void);
59 extern void __noreturn cpu_die(void);
60 extern void __cpu_die(unsigned int cpu);
61 extern int __cpu_disable(void);
62 #else
63 static inline int smp_rescan_cpus(void) { return 0; }
64 static inline void cpu_die(void) { }
65 #endif
66 
67 #endif /* __ASM_SMP_H */