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
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_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_ipl_cpu(void);
34 extern void smp_save_dump_secondary_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 void smp_cpu_set_capacity(int cpu, unsigned long val);
39 extern void smp_set_core_capacity(int cpu, unsigned long val);
40 extern unsigned long smp_cpu_get_capacity(int cpu);
41 extern int smp_cpu_get_cpu_address(int cpu);
42 extern void smp_fill_possible_mask(void);
43 extern void smp_detect_cpus(void);
44
smp_stop_cpu(void)45 static 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 */
smp_get_base_cpu(int cpu)56 static inline int smp_get_base_cpu(int cpu)
57 {
58 return cpu - (cpu % (smp_cpu_mtid + 1));
59 }
60
smp_cpus_done(unsigned int max_cpus)61 static inline void smp_cpus_done(unsigned int max_cpus)
62 {
63 }
64
65 extern int smp_rescan_cpus(bool early);
66 extern void __noreturn cpu_die(void);
67 extern void __cpu_die(unsigned int cpu);
68 extern int __cpu_disable(void);
69 extern void schedule_mcck_handler(void);
70 void notrace smp_yield_cpu(int cpu);
71
72 #endif /* __ASM_SMP_H */
73