1 /* 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>, 6 */ 7 #ifndef __ASM_SMP_H 8 #define __ASM_SMP_H 9 10 #ifdef CONFIG_SMP 11 12 #include <asm/system.h> 13 #include <asm/sigp.h> 14 15 extern void machine_restart_smp(char *); 16 extern void machine_halt_smp(void); 17 extern void machine_power_off_smp(void); 18 19 #define raw_smp_processor_id() (S390_lowcore.cpu_nr) 20 21 extern int __cpu_disable (void); 22 extern void __cpu_die (unsigned int cpu); 23 extern int __cpu_up (unsigned int cpu); 24 25 extern struct mutex smp_cpu_state_mutex; 26 extern int smp_cpu_polarization[]; 27 28 extern void arch_send_call_function_single_ipi(int cpu); 29 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 30 31 extern struct save_area *zfcpdump_save_areas[NR_CPUS + 1]; 32 33 extern void smp_switch_to_ipl_cpu(void (*func)(void *), void *); 34 extern void smp_switch_to_cpu(void (*)(void *), void *, unsigned long sp, 35 int from, int to); 36 extern void smp_restart_with_online_cpu(void); 37 extern void smp_restart_cpu(void); 38 39 /* 40 * returns 1 if (virtual) cpu is scheduled 41 * returns 0 otherwise 42 */ 43 static inline int smp_vcpu_scheduled(int cpu) 44 { 45 u32 status; 46 47 switch (sigp_ps(&status, 0, cpu, sigp_sense_running)) { 48 case sigp_status_stored: 49 /* Check for running status */ 50 if (status & 0x400) 51 return 0; 52 break; 53 case sigp_not_operational: 54 return 0; 55 default: 56 break; 57 } 58 return 1; 59 } 60 61 #else /* CONFIG_SMP */ 62 63 static inline void smp_switch_to_ipl_cpu(void (*func)(void *), void *data) 64 { 65 func(data); 66 } 67 68 static inline void smp_restart_with_online_cpu(void) 69 { 70 } 71 72 #define smp_vcpu_scheduled (1) 73 74 #endif /* CONFIG_SMP */ 75 76 #ifdef CONFIG_HOTPLUG_CPU 77 extern int smp_rescan_cpus(void); 78 extern void __noreturn cpu_die(void); 79 #else 80 static inline int smp_rescan_cpus(void) { return 0; } 81 static inline void cpu_die(void) { } 82 #endif 83 84 #endif /* __ASM_SMP_H */ 85