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 * Heiko Carstens <heiko.carstens@de.ibm.com>,
7 */
8 #ifndef __ASM_SMP_H
9 #define __ASM_SMP_H
10
11 #include <asm/sigp.h>
12 #include <asm/lowcore.h>
13 #include <asm/processor.h>
14
15 #define raw_smp_processor_id() (S390_lowcore.cpu_nr)
16
17 extern struct mutex smp_cpu_state_mutex;
18 extern unsigned int smp_cpu_mt_shift;
19 extern unsigned int smp_cpu_mtid;
20 extern __vector128 __initdata boot_cpu_vector_save_area[__NUM_VXRS];
21 extern cpumask_t cpu_setup_mask;
22
23 extern int __cpu_up(unsigned int cpu, struct task_struct *tidle);
24
25 extern void arch_send_call_function_single_ipi(int cpu);
26 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
27
28 extern void smp_call_online_cpu(void (*func)(void *), void *);
29 extern void smp_call_ipl_cpu(void (*func)(void *), void *);
30 extern void smp_emergency_stop(void);
31
32 extern int smp_find_processor_id(u16 address);
33 extern int smp_store_status(int cpu);
34 extern void smp_save_dump_cpus(void);
35 extern void smp_yield_cpu(int cpu);
36 extern void smp_cpu_set_polarization(int cpu, int val);
37 extern int smp_cpu_get_polarization(int cpu);
38 extern int smp_cpu_get_cpu_address(int cpu);
39 extern void smp_fill_possible_mask(void);
40 extern void smp_detect_cpus(void);
41
smp_stop_cpu(void)42 static inline void smp_stop_cpu(void)
43 {
44 u16 pcpu = stap();
45
46 for (;;) {
47 __pcpu_sigp(pcpu, SIGP_STOP, 0, NULL);
48 cpu_relax();
49 }
50 }
51
52 /* Return thread 0 CPU number as base CPU */
smp_get_base_cpu(int cpu)53 static inline int smp_get_base_cpu(int cpu)
54 {
55 return cpu - (cpu % (smp_cpu_mtid + 1));
56 }
57
smp_cpus_done(unsigned int max_cpus)58 static inline void smp_cpus_done(unsigned int max_cpus)
59 {
60 }
61
62 extern int smp_rescan_cpus(void);
63 extern void __noreturn cpu_die(void);
64 extern void __cpu_die(unsigned int cpu);
65 extern int __cpu_disable(void);
66 extern void schedule_mcck_handler(void);
67 void notrace smp_yield_cpu(int cpu);
68
69 #endif /* __ASM_SMP_H */
70