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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
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[CONFIG_MIPS_NR_CPU_NR_MAP];
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#define SMP_ASK_C0COUNT 0x8
46
47/* Mask of CPUs which are currently definitely operating coherently */
48extern cpumask_t cpu_coherent_mask;
49
50extern asmlinkage void smp_bootstrap(void);
51
52extern void calculate_cpu_foreign_map(void);
53
54/*
55 * this function sends a 'reschedule' IPI to another CPU.
56 * it goes straight through and wastes no time serializing
57 * anything. Worst case is that we lose a reschedule ...
58 */
59static inline void smp_send_reschedule(int cpu)
60{
61 extern const struct plat_smp_ops *mp_ops; /* private */
62
63 mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
64}
65
66#ifdef CONFIG_HOTPLUG_CPU
67static inline int __cpu_disable(void)
68{
69 extern const struct plat_smp_ops *mp_ops; /* private */
70
71 return mp_ops->cpu_disable();
72}
73
74static inline void __cpu_die(unsigned int cpu)
75{
76 extern const struct plat_smp_ops *mp_ops; /* private */
77
78 mp_ops->cpu_die(cpu);
79}
80
81extern void play_dead(void);
82#endif
83
84/*
85 * This function will set up the necessary IPIs for Linux to communicate
86 * with the CPUs in mask.
87 * Return 0 on success.
88 */
89int mips_smp_ipi_allocate(const struct cpumask *mask);
90
91/*
92 * This function will free up IPIs allocated with mips_smp_ipi_allocate to the
93 * CPUs in mask, which must be a subset of the IPIs that have been configured.
94 * Return 0 on success.
95 */
96int mips_smp_ipi_free(const struct cpumask *mask);
97
98static inline void arch_send_call_function_single_ipi(int cpu)
99{
100 extern const struct plat_smp_ops *mp_ops; /* private */
101
102 mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION);
103}
104
105static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
106{
107 extern const struct plat_smp_ops *mp_ops; /* private */
108
109 mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
110}
111
112#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
44extern volatile cpumask_t cpu_callin_map;
45
46extern void asmlinkage smp_bootstrap(void);
47
48/*
49 * this function sends a 'reschedule' IPI to another CPU.
50 * it goes straight through and wastes no time serializing
51 * anything. Worst case is that we lose a reschedule ...
52 */
53static inline void smp_send_reschedule(int cpu)
54{
55 extern struct plat_smp_ops *mp_ops; /* private */
56
57 mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
58}
59
60#ifdef CONFIG_HOTPLUG_CPU
61static inline int __cpu_disable(void)
62{
63 extern struct plat_smp_ops *mp_ops; /* private */
64
65 return mp_ops->cpu_disable();
66}
67
68static inline void __cpu_die(unsigned int cpu)
69{
70 extern struct plat_smp_ops *mp_ops; /* private */
71
72 mp_ops->cpu_die(cpu);
73}
74
75extern void play_dead(void);
76#endif
77
78extern asmlinkage void smp_call_function_interrupt(void);
79
80static inline void arch_send_call_function_single_ipi(int cpu)
81{
82 extern struct plat_smp_ops *mp_ops; /* private */
83
84 mp_ops->send_ipi_mask(&cpumask_of_cpu(cpu), SMP_CALL_FUNCTION);
85}
86
87static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
88{
89 extern struct plat_smp_ops *mp_ops; /* private */
90
91 mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
92}
93
94#endif /* __ASM_SMP_H */