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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 | |
7aa1c8f4 RB |
45 | /* Used by kexec crashdump to save all cpu's state */ |
46 | #define SMP_DUMP 0x8 | |
c4a987db | 47 | #define SMP_ASK_C0COUNT 0x10 |
ddcdb1b4 | 48 | |
cafb45b2 | 49 | extern cpumask_t cpu_callin_map; |
1da177e4 | 50 | |
76306f42 PB |
51 | /* Mask of CPUs which are currently definitely operating coherently */ |
52 | extern cpumask_t cpu_coherent_mask; | |
53 | ||
1da177e4 LT |
54 | extern void asmlinkage smp_bootstrap(void); |
55 | ||
826e99be JH |
56 | extern void calculate_cpu_foreign_map(void); |
57 | ||
1da177e4 LT |
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 | */ | |
63 | static inline void smp_send_reschedule(int cpu) | |
64 | { | |
87353d8a RB |
65 | extern struct plat_smp_ops *mp_ops; /* private */ |
66 | ||
67 | mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF); | |
1da177e4 LT |
68 | } |
69 | ||
1b2bc75c RB |
70 | #ifdef CONFIG_HOTPLUG_CPU |
71 | static inline int __cpu_disable(void) | |
72 | { | |
70342287 | 73 | extern struct plat_smp_ops *mp_ops; /* private */ |
1b2bc75c RB |
74 | |
75 | return mp_ops->cpu_disable(); | |
76 | } | |
77 | ||
78 | static inline void __cpu_die(unsigned int cpu) | |
79 | { | |
70342287 | 80 | extern struct plat_smp_ops *mp_ops; /* private */ |
1b2bc75c RB |
81 | |
82 | mp_ops->cpu_die(cpu); | |
83 | } | |
84 | ||
85 | extern void play_dead(void); | |
86 | #endif | |
87 | ||
eef34ec5 RB |
88 | static inline void arch_send_call_function_single_ipi(int cpu) |
89 | { | |
70342287 | 90 | extern struct plat_smp_ops *mp_ops; /* private */ |
eef34ec5 | 91 | |
1ed1835f | 92 | mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION); |
eef34ec5 RB |
93 | } |
94 | ||
95 | static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) | |
96 | { | |
70342287 | 97 | extern struct plat_smp_ops *mp_ops; /* private */ |
eef34ec5 RB |
98 | |
99 | mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION); | |
100 | } | |
2f304c0a | 101 | |
7aa1c8f4 RB |
102 | #if defined(CONFIG_KEXEC) |
103 | extern void (*dump_ipi_function_ptr)(void *); | |
104 | void dump_send_ipi(void (*dump_ipi_callback)(void *)); | |
105 | #endif | |
1da177e4 | 106 | #endif /* __ASM_SMP_H */ |