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