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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
17extern struct mutex smp_cpu_state_mutex;
18extern unsigned int smp_cpu_mt_shift;
19extern unsigned int smp_cpu_mtid;
20extern __vector128 __initdata boot_cpu_vector_save_area[__NUM_VXRS];
21extern cpumask_t cpu_setup_mask;
22
23extern int __cpu_up(unsigned int cpu, struct task_struct *tidle);
24
25extern void arch_send_call_function_single_ipi(int cpu);
26extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
27
28extern void smp_call_online_cpu(void (*func)(void *), void *);
29extern void smp_call_ipl_cpu(void (*func)(void *), void *);
30extern void smp_emergency_stop(void);
31
32extern int smp_find_processor_id(u16 address);
33extern int smp_store_status(int cpu);
34extern void smp_save_dump_cpus(void);
35extern void smp_yield_cpu(int cpu);
36extern void smp_cpu_set_polarization(int cpu, int val);
37extern int smp_cpu_get_polarization(int cpu);
38extern int smp_cpu_get_cpu_address(int cpu);
39extern void smp_fill_possible_mask(void);
40extern void smp_detect_cpus(void);
41
42static 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 */
53static inline int smp_get_base_cpu(int cpu)
54{
55 return cpu - (cpu % (smp_cpu_mtid + 1));
56}
57
58static inline void smp_cpus_done(unsigned int max_cpus)
59{
60}
61
62extern int smp_rescan_cpus(void);
63extern void __noreturn cpu_die(void);
64extern void __cpu_die(unsigned int cpu);
65extern int __cpu_disable(void);
66extern void schedule_mcck_handler(void);
67void notrace smp_yield_cpu(int cpu);
68
69#endif /* __ASM_SMP_H */