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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[];
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
56/*
57 * this function sends a 'reschedule' IPI to another CPU.
58 * it goes straight through and wastes no time serializing
59 * anything. Worst case is that we lose a reschedule ...
60 */
61static inline void smp_send_reschedule(int cpu)
62{
63 extern struct plat_smp_ops *mp_ops; /* private */
64
65 mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
66}
67
68#ifdef CONFIG_HOTPLUG_CPU
69static inline int __cpu_disable(void)
70{
71 extern struct plat_smp_ops *mp_ops; /* private */
72
73 return mp_ops->cpu_disable();
74}
75
76static inline void __cpu_die(unsigned int cpu)
77{
78 extern struct plat_smp_ops *mp_ops; /* private */
79
80 mp_ops->cpu_die(cpu);
81}
82
83extern void play_dead(void);
84#endif
85
86static inline void arch_send_call_function_single_ipi(int cpu)
87{
88 extern struct plat_smp_ops *mp_ops; /* private */
89
90 mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION);
91}
92
93static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
94{
95 extern struct plat_smp_ops *mp_ops; /* private */
96
97 mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
98}
99
100#if defined(CONFIG_KEXEC)
101extern void (*dump_ipi_function_ptr)(void *);
102void dump_send_ipi(void (*dump_ipi_callback)(void *));
103#endif
104#endif /* __ASM_SMP_H */