xref: /openbmc/linux/arch/sh/include/asm/smp.h (revision 33def849)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_SMP_H
3 #define __ASM_SH_SMP_H
4 
5 #include <linux/bitops.h>
6 #include <linux/cpumask.h>
7 #include <asm/smp-ops.h>
8 
9 #ifdef CONFIG_SMP
10 
11 #include <linux/atomic.h>
12 #include <asm/current.h>
13 #include <asm/percpu.h>
14 
15 #define raw_smp_processor_id()	(current_thread_info()->cpu)
16 
17 /* Map from cpu id to sequential logical cpu number. */
18 extern int __cpu_number_map[NR_CPUS];
19 #define cpu_number_map(cpu)  __cpu_number_map[cpu]
20 
21 /* The reverse map from sequential logical cpu number to cpu id.  */
22 extern int __cpu_logical_map[NR_CPUS];
23 #define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
24 
25 enum {
26 	SMP_MSG_FUNCTION,
27 	SMP_MSG_RESCHEDULE,
28 	SMP_MSG_FUNCTION_SINGLE,
29 	SMP_MSG_TIMER,
30 
31 	SMP_MSG_NR,	/* must be last */
32 };
33 
34 DECLARE_PER_CPU(int, cpu_state);
35 
36 void smp_message_recv(unsigned int msg);
37 
38 void arch_send_call_function_single_ipi(int cpu);
39 void arch_send_call_function_ipi_mask(const struct cpumask *mask);
40 
41 void native_play_dead(void);
42 void native_cpu_die(unsigned int cpu);
43 int native_cpu_disable(unsigned int cpu);
44 
45 #ifdef CONFIG_HOTPLUG_CPU
46 void play_dead_common(void);
47 extern int __cpu_disable(void);
48 
__cpu_die(unsigned int cpu)49 static inline void __cpu_die(unsigned int cpu)
50 {
51 	extern struct plat_smp_ops *mp_ops;     /* private */
52 
53 	mp_ops->cpu_die(cpu);
54 }
55 #endif
56 
hard_smp_processor_id(void)57 static inline int hard_smp_processor_id(void)
58 {
59 	extern struct plat_smp_ops *mp_ops;	/* private */
60 
61 	if (!mp_ops)
62 		return 0;	/* boot CPU */
63 
64 	return mp_ops->smp_processor_id();
65 }
66 
67 struct of_cpu_method {
68 	const char *method;
69 	struct plat_smp_ops *ops;
70 };
71 
72 #define CPU_METHOD_OF_DECLARE(name, _method, _ops)			\
73 	static const struct of_cpu_method __cpu_method_of_table_##name	\
74 		__used __section("__cpu_method_of_table")		\
75 		= { .method = _method, .ops = _ops }
76 
77 #else
78 
79 #define hard_smp_processor_id()	(0)
80 
81 #endif /* CONFIG_SMP */
82 
83 #endif /* __ASM_SH_SMP_H */
84