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() (S390_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_online_cpu(void (*func)(void *), void *);
28 extern void smp_call_ipl_cpu(void (*func)(void *), void *);
29 extern void smp_emergency_stop(void);
30
31 extern int smp_find_processor_id(u16 address);
32 extern int smp_store_status(int cpu);
33 extern void smp_save_dump_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
smp_stop_cpu(void)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 */
smp_get_base_cpu(int cpu)52 static inline int smp_get_base_cpu(int cpu)
53 {
54 return cpu - (cpu % (smp_cpu_mtid + 1));
55 }
56
smp_cpus_done(unsigned int max_cpus)57 static inline void smp_cpus_done(unsigned int max_cpus)
58 {
59 }
60
61 extern int smp_rescan_cpus(void);
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