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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_H
12#define __ASM_SMP_H
13
14#include <linux/compiler.h>
15#include <linux/linkage.h>
16#include <linux/threads.h>
17#include <linux/cpumask.h>
18
19#include <asm/smp-ops.h>
20
21extern int smp_num_siblings;
22extern cpumask_t cpu_sibling_map[];
23extern cpumask_t cpu_core_map[];
24extern cpumask_t cpu_foreign_map[];
25
26static inline int raw_smp_processor_id(void)
27{
28#if defined(__VDSO__)
29 extern int vdso_smp_processor_id(void)
30 __compiletime_error("VDSO should not call smp_processor_id()");
31 return vdso_smp_processor_id();
32#else
33 return current_thread_info()->cpu;
34#endif
35}
36#define raw_smp_processor_id raw_smp_processor_id
37
38/* Map from cpu id to sequential logical cpu number. This will only
39 not be idempotent when cpus failed to come on-line. */
40extern int __cpu_number_map[CONFIG_MIPS_NR_CPU_NR_MAP];
41#define cpu_number_map(cpu) __cpu_number_map[cpu]
42
43/* The reverse map from sequential logical cpu number to cpu id. */
44extern int __cpu_logical_map[NR_CPUS];
45#define cpu_logical_map(cpu) __cpu_logical_map[cpu]
46
47#define NO_PROC_ID (-1)
48
49#define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */
50#define SMP_CALL_FUNCTION 0x2
51/* Octeon - Tell another core to flush its icache */
52#define SMP_ICACHE_FLUSH 0x4
53
54/* Mask of CPUs which are currently definitely operating coherently */
55extern cpumask_t cpu_coherent_mask;
56
57extern unsigned int smp_max_threads __initdata;
58
59extern asmlinkage void smp_bootstrap(void);
60
61extern void calculate_cpu_foreign_map(void);
62
63asmlinkage void start_secondary(void);
64
65/*
66 * this function sends a 'reschedule' IPI to another CPU.
67 * it goes straight through and wastes no time serializing
68 * anything. Worst case is that we lose a reschedule ...
69 */
70static inline void arch_smp_send_reschedule(int cpu)
71{
72 extern const struct plat_smp_ops *mp_ops; /* private */
73
74 mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
75}
76
77#ifdef CONFIG_HOTPLUG_CPU
78static inline int __cpu_disable(void)
79{
80 extern const struct plat_smp_ops *mp_ops; /* private */
81
82 return mp_ops->cpu_disable();
83}
84
85static inline void __cpu_die(unsigned int cpu)
86{
87 extern const struct plat_smp_ops *mp_ops; /* private */
88
89 mp_ops->cpu_die(cpu);
90}
91
92extern void __noreturn play_dead(void);
93#endif
94
95#ifdef CONFIG_KEXEC_CORE
96static inline void kexec_nonboot_cpu(void)
97{
98 extern const struct plat_smp_ops *mp_ops; /* private */
99
100 return mp_ops->kexec_nonboot_cpu();
101}
102
103static inline void *kexec_nonboot_cpu_func(void)
104{
105 extern const struct plat_smp_ops *mp_ops; /* private */
106
107 return mp_ops->kexec_nonboot_cpu;
108}
109#endif
110
111/*
112 * This function will set up the necessary IPIs for Linux to communicate
113 * with the CPUs in mask.
114 * Return 0 on success.
115 */
116int mips_smp_ipi_allocate(const struct cpumask *mask);
117
118/*
119 * This function will free up IPIs allocated with mips_smp_ipi_allocate to the
120 * CPUs in mask, which must be a subset of the IPIs that have been configured.
121 * Return 0 on success.
122 */
123int mips_smp_ipi_free(const struct cpumask *mask);
124
125static inline void arch_send_call_function_single_ipi(int cpu)
126{
127 extern const struct plat_smp_ops *mp_ops; /* private */
128
129 mp_ops->send_ipi_single(cpu, SMP_CALL_FUNCTION);
130}
131
132static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
133{
134 extern const struct plat_smp_ops *mp_ops; /* private */
135
136 mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
137}
138
139#endif /* __ASM_SMP_H */
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_H
12#define __ASM_SMP_H
13
14#include <linux/bitops.h>
15#include <linux/linkage.h>
16#include <linux/smp.h>
17#include <linux/threads.h>
18#include <linux/cpumask.h>
19
20#include <linux/atomic.h>
21#include <asm/smp-ops.h>
22
23extern int smp_num_siblings;
24extern cpumask_t cpu_sibling_map[];
25extern cpumask_t cpu_core_map[];
26extern cpumask_t cpu_foreign_map[];
27
28#define raw_smp_processor_id() (current_thread_info()->cpu)
29
30/* Map from cpu id to sequential logical cpu number. This will only
31 not be idempotent when cpus failed to come on-line. */
32extern int __cpu_number_map[NR_CPUS];
33#define cpu_number_map(cpu) __cpu_number_map[cpu]
34
35/* The reverse map from sequential logical cpu number to cpu id. */
36extern int __cpu_logical_map[NR_CPUS];
37#define cpu_logical_map(cpu) __cpu_logical_map[cpu]
38
39#define NO_PROC_ID (-1)
40
41#define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */
42#define SMP_CALL_FUNCTION 0x2
43/* Octeon - Tell another core to flush its icache */
44#define SMP_ICACHE_FLUSH 0x4
45/* Used by kexec crashdump to save all cpu's state */
46#define SMP_DUMP 0x8
47#define SMP_ASK_C0COUNT 0x10
48
49extern cpumask_t cpu_callin_map;
50
51/* Mask of CPUs which are currently definitely operating coherently */
52extern cpumask_t cpu_coherent_mask;
53
54extern void asmlinkage smp_bootstrap(void);
55
56extern void calculate_cpu_foreign_map(void);
57
58/*
59 * this function sends a 'reschedule' IPI to another CPU.
60 * it goes straight through and wastes no time serializing
61 * anything. Worst case is that we lose a reschedule ...
62 */
63static inline void smp_send_reschedule(int cpu)
64{
65 extern struct plat_smp_ops *mp_ops; /* private */
66
67 mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
68}
69
70#ifdef CONFIG_HOTPLUG_CPU
71static inline int __cpu_disable(void)
72{
73 extern struct plat_smp_ops *mp_ops; /* private */
74
75 return mp_ops->cpu_disable();
76}
77
78static inline void __cpu_die(unsigned int cpu)
79{
80 extern struct plat_smp_ops *mp_ops; /* private */
81
82 mp_ops->cpu_die(cpu);
83}
84
85extern void play_dead(void);
86#endif
87
88/*
89 * This function will set up the necessary IPIs for Linux to communicate
90 * with the CPUs in mask.
91 * Return 0 on success.
92 */
93int mips_smp_ipi_allocate(const struct cpumask *mask);
94
95/*
96 * This function will free up IPIs allocated with mips_smp_ipi_allocate to the
97 * CPUs in mask, which must be a subset of the IPIs that have been configured.
98 * Return 0 on success.
99 */
100int mips_smp_ipi_free(const struct cpumask *mask);
101
102static inline void arch_send_call_function_single_ipi(int cpu)
103{
104 extern struct plat_smp_ops *mp_ops; /* private */
105
106 mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION);
107}
108
109static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
110{
111 extern struct plat_smp_ops *mp_ops; /* private */
112
113 mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
114}
115
116#if defined(CONFIG_KEXEC)
117extern void (*dump_ipi_function_ptr)(void *);
118void dump_send_ipi(void (*dump_ipi_callback)(void *));
119#endif
120#endif /* __ASM_SMP_H */