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1 /*
2  * This file is subject to the terms and conditions of the GNU General
3  * Public License.  See the file "COPYING" in the main directory of this
4  * archive for more details.
5  *
6  * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
7  * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
8  * Copyright (C) 2000, 2001, 2002 Ralf Baechle
9  * Copyright (C) 2000, 2001 Broadcom Corporation
10  */
11 #ifndef __ASM_SMP_OPS_H
12 #define __ASM_SMP_OPS_H
13 
14 #include <linux/errno.h>
15 
16 #include <asm/mips-cm.h>
17 
18 #ifdef CONFIG_SMP
19 
20 #include <linux/cpumask.h>
21 
22 struct task_struct;
23 
24 struct plat_smp_ops {
25 	void (*send_ipi_single)(int cpu, unsigned int action);
26 	void (*send_ipi_mask)(const struct cpumask *mask, unsigned int action);
27 	void (*init_secondary)(void);
28 	void (*smp_finish)(void);
29 	void (*boot_secondary)(int cpu, struct task_struct *idle);
30 	void (*smp_setup)(void);
31 	void (*prepare_cpus)(unsigned int max_cpus);
32 #ifdef CONFIG_HOTPLUG_CPU
33 	int (*cpu_disable)(void);
34 	void (*cpu_die)(unsigned int cpu);
35 #endif
36 };
37 
38 extern void register_smp_ops(struct plat_smp_ops *ops);
39 
plat_smp_setup(void)40 static inline void plat_smp_setup(void)
41 {
42 	extern struct plat_smp_ops *mp_ops;	/* private */
43 
44 	mp_ops->smp_setup();
45 }
46 
47 extern void gic_send_ipi_single(int cpu, unsigned int action);
48 extern void gic_send_ipi_mask(const struct cpumask *mask, unsigned int action);
49 
50 #else /* !CONFIG_SMP */
51 
52 struct plat_smp_ops;
53 
plat_smp_setup(void)54 static inline void plat_smp_setup(void)
55 {
56 	/* UP, nothing to do ...  */
57 }
58 
register_smp_ops(struct plat_smp_ops * ops)59 static inline void register_smp_ops(struct plat_smp_ops *ops)
60 {
61 }
62 
63 #endif /* !CONFIG_SMP */
64 
register_up_smp_ops(void)65 static inline int register_up_smp_ops(void)
66 {
67 #ifdef CONFIG_SMP_UP
68 	extern struct plat_smp_ops up_smp_ops;
69 
70 	register_smp_ops(&up_smp_ops);
71 
72 	return 0;
73 #else
74 	return -ENODEV;
75 #endif
76 }
77 
register_cmp_smp_ops(void)78 static inline int register_cmp_smp_ops(void)
79 {
80 #ifdef CONFIG_MIPS_CMP
81 	extern struct plat_smp_ops cmp_smp_ops;
82 
83 	if (!mips_cm_present())
84 		return -ENODEV;
85 
86 	register_smp_ops(&cmp_smp_ops);
87 
88 	return 0;
89 #else
90 	return -ENODEV;
91 #endif
92 }
93 
register_vsmp_smp_ops(void)94 static inline int register_vsmp_smp_ops(void)
95 {
96 #ifdef CONFIG_MIPS_MT_SMP
97 	extern struct plat_smp_ops vsmp_smp_ops;
98 
99 	register_smp_ops(&vsmp_smp_ops);
100 
101 	return 0;
102 #else
103 	return -ENODEV;
104 #endif
105 }
106 
107 #ifdef CONFIG_MIPS_CPS
108 extern int register_cps_smp_ops(void);
109 #else
register_cps_smp_ops(void)110 static inline int register_cps_smp_ops(void)
111 {
112 	return -ENODEV;
113 }
114 #endif
115 
116 #endif /* __ASM_SMP_OPS_H */
117