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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[]; | |
25 | ||
39c715b7 | 26 | #define raw_smp_processor_id() (current_thread_info()->cpu) |
1da177e4 LT |
27 | |
28 | /* Map from cpu id to sequential logical cpu number. This will only | |
70342287 | 29 | not be idempotent when cpus failed to come on-line. */ |
1da177e4 LT |
30 | extern 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. */ | |
34 | extern int __cpu_logical_map[NR_CPUS]; | |
35 | #define cpu_logical_map(cpu) __cpu_logical_map[cpu] | |
36 | ||
37 | #define NO_PROC_ID (-1) | |
38 | ||
70342287 | 39 | #define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */ |
1da177e4 | 40 | #define SMP_CALL_FUNCTION 0x2 |
ddcdb1b4 DD |
41 | /* Octeon - Tell another core to flush its icache */ |
42 | #define SMP_ICACHE_FLUSH 0x4 | |
7aa1c8f4 RB |
43 | /* Used by kexec crashdump to save all cpu's state */ |
44 | #define SMP_DUMP 0x8 | |
c4a987db | 45 | #define SMP_ASK_C0COUNT 0x10 |
ddcdb1b4 | 46 | |
773cb77d | 47 | extern volatile cpumask_t cpu_callin_map; |
1da177e4 | 48 | |
76306f42 PB |
49 | /* Mask of CPUs which are currently definitely operating coherently */ |
50 | extern cpumask_t cpu_coherent_mask; | |
51 | ||
1da177e4 LT |
52 | extern void asmlinkage smp_bootstrap(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 | */ | |
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 | ||
1da177e4 LT |
84 | extern asmlinkage void smp_call_function_interrupt(void); |
85 | ||
eef34ec5 RB |
86 | static inline void arch_send_call_function_single_ipi(int cpu) |
87 | { | |
70342287 | 88 | extern struct plat_smp_ops *mp_ops; /* private */ |
eef34ec5 RB |
89 | |
90 | mp_ops->send_ipi_mask(&cpumask_of_cpu(cpu), SMP_CALL_FUNCTION); | |
91 | } | |
92 | ||
93 | static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) | |
94 | { | |
70342287 | 95 | extern struct plat_smp_ops *mp_ops; /* private */ |
eef34ec5 RB |
96 | |
97 | mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION); | |
98 | } | |
2f304c0a | 99 | |
7aa1c8f4 RB |
100 | #if defined(CONFIG_KEXEC) |
101 | extern void (*dump_ipi_function_ptr)(void *); | |
102 | void dump_send_ipi(void (*dump_ipi_callback)(void *)); | |
103 | #endif | |
1da177e4 | 104 | #endif /* __ASM_SMP_H */ |