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1da177e4 LT |
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 | ||
1da177e4 LT |
14 | #include <linux/bitops.h> |
15 | #include <linux/linkage.h> | |
631330f5 | 16 | #include <linux/smp.h> |
1da177e4 LT |
17 | #include <linux/threads.h> |
18 | #include <linux/cpumask.h> | |
87353d8a | 19 | |
60063497 | 20 | #include <linux/atomic.h> |
87353d8a | 21 | #include <asm/smp-ops.h> |
1da177e4 | 22 | |
0ab7aefc RB |
23 | extern int smp_num_siblings; |
24 | extern cpumask_t cpu_sibling_map[]; | |
bda4584c | 25 | extern cpumask_t cpu_core_map[]; |
640511ae | 26 | extern cpumask_t cpu_foreign_map[]; |
0ab7aefc | 27 | |
39c715b7 | 28 | #define raw_smp_processor_id() (current_thread_info()->cpu) |
1da177e4 LT |
29 | |
30 | /* Map from cpu id to sequential logical cpu number. This will only | |
70342287 | 31 | not be idempotent when cpus failed to come on-line. */ |
1da177e4 LT |
32 | extern 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. */ | |
36 | extern int __cpu_logical_map[NR_CPUS]; | |
37 | #define cpu_logical_map(cpu) __cpu_logical_map[cpu] | |
38 | ||
39 | #define NO_PROC_ID (-1) | |
40 | ||
70342287 | 41 | #define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */ |
1da177e4 | 42 | #define SMP_CALL_FUNCTION 0x2 |
ddcdb1b4 DD |
43 | /* Octeon - Tell another core to flush its icache */ |
44 | #define SMP_ICACHE_FLUSH 0x4 | |
c83c2eed | 45 | #define SMP_ASK_C0COUNT 0x8 |
ddcdb1b4 | 46 | |
76306f42 PB |
47 | /* Mask of CPUs which are currently definitely operating coherently */ |
48 | extern cpumask_t cpu_coherent_mask; | |
49 | ||
1da177e4 LT |
50 | extern void asmlinkage smp_bootstrap(void); |
51 | ||
826e99be JH |
52 | extern void calculate_cpu_foreign_map(void); |
53 | ||
1da177e4 LT |
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 | */ | |
59 | static inline void smp_send_reschedule(int cpu) | |
60 | { | |
87353d8a RB |
61 | extern struct plat_smp_ops *mp_ops; /* private */ |
62 | ||
63 | mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF); | |
1da177e4 LT |
64 | } |
65 | ||
1b2bc75c RB |
66 | #ifdef CONFIG_HOTPLUG_CPU |
67 | static inline int __cpu_disable(void) | |
68 | { | |
70342287 | 69 | extern struct plat_smp_ops *mp_ops; /* private */ |
1b2bc75c RB |
70 | |
71 | return mp_ops->cpu_disable(); | |
72 | } | |
73 | ||
74 | static inline void __cpu_die(unsigned int cpu) | |
75 | { | |
70342287 | 76 | extern struct plat_smp_ops *mp_ops; /* private */ |
1b2bc75c RB |
77 | |
78 | mp_ops->cpu_die(cpu); | |
79 | } | |
80 | ||
81 | extern void play_dead(void); | |
82 | #endif | |
83 | ||
7688c539 MR |
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 | */ | |
89 | int 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 | */ | |
96 | int mips_smp_ipi_free(const struct cpumask *mask); | |
97 | ||
eef34ec5 RB |
98 | static inline void arch_send_call_function_single_ipi(int cpu) |
99 | { | |
70342287 | 100 | extern struct plat_smp_ops *mp_ops; /* private */ |
eef34ec5 | 101 | |
1ed1835f | 102 | mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION); |
eef34ec5 RB |
103 | } |
104 | ||
105 | static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) | |
106 | { | |
70342287 | 107 | extern struct plat_smp_ops *mp_ops; /* private */ |
eef34ec5 RB |
108 | |
109 | mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION); | |
110 | } | |
2f304c0a | 111 | |
1da177e4 | 112 | #endif /* __ASM_SMP_H */ |