1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright IBM Corp. 1999, 2012 4 * Author(s): Denis Joseph Barrow, 5 * Martin Schwidefsky <schwidefsky@de.ibm.com>, 6 */ 7 #ifndef __ASM_SMP_H 8 #define __ASM_SMP_H 9 10 #include <asm/sigp.h> 11 #include <asm/lowcore.h> 12 #include <asm/processor.h> 13 14 #define raw_smp_processor_id() (get_lowcore()->cpu_nr) 15 16 extern struct mutex smp_cpu_state_mutex; 17 extern unsigned int smp_cpu_mt_shift; 18 extern unsigned int smp_cpu_mtid; 19 extern __vector128 __initdata boot_cpu_vector_save_area[__NUM_VXRS]; 20 extern cpumask_t cpu_setup_mask; 21 22 extern int __cpu_up(unsigned int cpu, struct task_struct *tidle); 23 24 extern void arch_send_call_function_single_ipi(int cpu); 25 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 26 27 extern void smp_call_ipl_cpu(void (*func)(void *), void *); 28 extern void smp_emergency_stop(void); 29 30 extern int smp_find_processor_id(u16 address); 31 extern int smp_store_status(int cpu); 32 extern void smp_save_dump_ipl_cpu(void); 33 extern void smp_save_dump_secondary_cpus(void); 34 extern void smp_yield_cpu(int cpu); 35 extern void smp_cpu_set_polarization(int cpu, int val); 36 extern int smp_cpu_get_polarization(int cpu); 37 extern int smp_cpu_get_cpu_address(int cpu); 38 extern void smp_fill_possible_mask(void); 39 extern void smp_detect_cpus(void); 40 41 static inline void smp_stop_cpu(void) 42 { 43 u16 pcpu = stap(); 44 45 for (;;) { 46 __pcpu_sigp(pcpu, SIGP_STOP, 0, NULL); 47 cpu_relax(); 48 } 49 } 50 51 /* Return thread 0 CPU number as base CPU */ 52 static inline int smp_get_base_cpu(int cpu) 53 { 54 return cpu - (cpu % (smp_cpu_mtid + 1)); 55 } 56 57 static inline void smp_cpus_done(unsigned int max_cpus) 58 { 59 } 60 61 extern int smp_rescan_cpus(bool early); 62 extern void __noreturn cpu_die(void); 63 extern void __cpu_die(unsigned int cpu); 64 extern int __cpu_disable(void); 65 extern void schedule_mcck_handler(void); 66 void notrace smp_yield_cpu(int cpu); 67 68 #endif /* __ASM_SMP_H */ 69