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Linux kernel mirror (for testing)
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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 */
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#define arch_scale_cpu_capacity smp_cpu_get_capacity
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_ipl_cpu(void (*func)(void *), void *);
29extern void smp_emergency_stop(void);
30
31extern int smp_find_processor_id(u16 address);
32extern int smp_store_status(int cpu);
33extern void smp_save_dump_ipl_cpu(void);
34extern void smp_save_dump_secondary_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 void smp_cpu_set_capacity(int cpu, unsigned long val);
39extern void smp_set_core_capacity(int cpu, unsigned long val);
40extern unsigned long smp_cpu_get_capacity(int cpu);
41extern int smp_cpu_get_cpu_address(int cpu);
42extern void smp_fill_possible_mask(void);
43extern void smp_detect_cpus(void);
44
45static inline void smp_stop_cpu(void)
46{
47 u16 pcpu = stap();
48
49 for (;;) {
50 __pcpu_sigp(pcpu, SIGP_STOP, 0, NULL);
51 cpu_relax();
52 }
53}
54
55/* Return thread 0 CPU number as base CPU */
56static inline int smp_get_base_cpu(int cpu)
57{
58 return cpu - (cpu % (smp_cpu_mtid + 1));
59}
60
61static inline void smp_cpus_done(unsigned int max_cpus)
62{
63}
64
65extern int smp_rescan_cpus(bool early);
66extern void __noreturn cpu_die(void);
67extern void __cpu_die(unsigned int cpu);
68extern int __cpu_disable(void);
69extern void schedule_mcck_handler(void);
70void notrace smp_yield_cpu(int cpu);
71
72#endif /* __ASM_SMP_H */