projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| c20c89a6 HC |
2 | * Copyright IBM Corp. 1999,2009 |
| 3 | * Author(s): Denis Joseph Barrow, | |
| 4 | * Martin Schwidefsky <schwidefsky@de.ibm.com>, | |
| 5 | * Heiko Carstens <heiko.carstens@de.ibm.com>, | |
| 1da177e4 LT |
6 | */ |
| 7 | #ifndef __ASM_SMP_H | |
| 8 | #define __ASM_SMP_H | |
| 9 | ||
| c20c89a6 | 10 | #ifdef CONFIG_SMP |
| 1da177e4 | 11 | |
| 2e5061e4 | 12 | #include <asm/system.h> |
| c20c89a6 | 13 | #include <asm/sigp.h> |
| 1da177e4 | 14 | |
| 2b67fc46 HC |
15 | extern void machine_restart_smp(char *); |
| 16 | extern void machine_halt_smp(void); | |
| 17 | extern void machine_power_off_smp(void); | |
| 18 | ||
| 7b468488 | 19 | #define raw_smp_processor_id() (S390_lowcore.cpu_nr) |
| 1da177e4 LT |
20 | |
| 21 | extern int __cpu_disable (void); | |
| 22 | extern void __cpu_die (unsigned int cpu); | |
| 1da177e4 LT |
23 | extern int __cpu_up (unsigned int cpu); |
| 24 | ||
| dbd70fb4 HC |
25 | extern struct mutex smp_cpu_state_mutex; |
| 26 | ||
| ca9fc75a | 27 | extern void arch_send_call_function_single_ipi(int cpu); |
| 630cd046 | 28 | extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); |
| ca9fc75a | 29 | |
| f64ca217 | 30 | extern struct save_area *zfcpdump_save_areas[NR_CPUS + 1]; |
| c20c89a6 | 31 | |
| 2c2df118 HC |
32 | extern void smp_switch_to_ipl_cpu(void (*func)(void *), void *); |
| 33 | extern void smp_switch_to_cpu(void (*)(void *), void *, unsigned long sp, | |
| 34 | int from, int to); | |
| 1943f53c | 35 | extern void smp_restart_with_online_cpu(void); |
| 2c2df118 HC |
36 | extern void smp_restart_cpu(void); |
| 37 | ||
| 59b69787 GS |
38 | /* |
| 39 | * returns 1 if (virtual) cpu is scheduled | |
| 40 | * returns 0 otherwise | |
| 41 | */ | |
| 42 | static inline int smp_vcpu_scheduled(int cpu) | |
| 43 | { | |
| 44 | u32 status; | |
| 45 | ||
| 46 | switch (sigp_ps(&status, 0, cpu, sigp_sense_running)) { | |
| 47 | case sigp_status_stored: | |
| 48 | /* Check for running status */ | |
| 49 | if (status & 0x400) | |
| 50 | return 0; | |
| 51 | break; | |
| 52 | case sigp_not_operational: | |
| 53 | return 0; | |
| 54 | default: | |
| 55 | break; | |
| 56 | } | |
| 57 | return 1; | |
| 58 | } | |
| 59 | ||
| 2c2df118 HC |
60 | #else /* CONFIG_SMP */ |
| 61 | ||
| 62 | static inline void smp_switch_to_ipl_cpu(void (*func)(void *), void *data) | |
| 63 | { | |
| 64 | func(data); | |
| 65 | } | |
| 66 | ||
| 1943f53c MH |
67 | static inline void smp_restart_with_online_cpu(void) |
| 68 | { | |
| 69 | } | |
| 70 | ||
| 59b69787 GS |
71 | #define smp_vcpu_scheduled (1) |
| 72 | ||
| c20c89a6 | 73 | #endif /* CONFIG_SMP */ |
| 1da177e4 | 74 | |
| 1e489518 HC |
75 | #ifdef CONFIG_HOTPLUG_CPU |
| 76 | extern int smp_rescan_cpus(void); | |
| da7f51c1 | 77 | extern void __noreturn cpu_die(void); |
| 1e489518 HC |
78 | #else |
| 79 | static inline int smp_rescan_cpus(void) { return 0; } | |
| da7f51c1 | 80 | static inline void cpu_die(void) { } |
| 1e489518 HC |
81 | #endif |
| 82 | ||
| c20c89a6 | 83 | #endif /* __ASM_SMP_H */ |