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1da177e4 LT |
1 | /* |
2 | * linux/include/asm-arm/smp.h | |
3 | * | |
4 | * Copyright (C) 2004-2005 ARM Ltd. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #ifndef __ASM_ARM_SMP_H | |
11 | #define __ASM_ARM_SMP_H | |
12 | ||
1da177e4 LT |
13 | #include <linux/threads.h> |
14 | #include <linux/cpumask.h> | |
15 | #include <linux/thread_info.h> | |
16 | ||
17 | #include <asm/arch/smp.h> | |
18 | ||
19 | #ifndef CONFIG_SMP | |
20 | # error "<asm-arm/smp.h> included in non-SMP build" | |
21 | #endif | |
22 | ||
39c715b7 | 23 | #define raw_smp_processor_id() (current_thread_info()->cpu) |
1da177e4 | 24 | |
1da177e4 LT |
25 | /* |
26 | * at the moment, there's not a big penalty for changing CPUs | |
27 | * (the >big< penalty is running SMP in the first place) | |
28 | */ | |
29 | #define PROC_CHANGE_PENALTY 15 | |
30 | ||
31 | struct seq_file; | |
32 | ||
33 | /* | |
34 | * generate IPI list text | |
35 | */ | |
36 | extern void show_ipi_list(struct seq_file *p); | |
37 | ||
3b6353fa RK |
38 | /* |
39 | * Called from assembly code, this handles an IPI. | |
40 | */ | |
41 | asmlinkage void do_IPI(struct pt_regs *regs); | |
42 | ||
7bbb7940 RK |
43 | /* |
44 | * Setup the SMP cpu_possible_map | |
45 | */ | |
46 | extern void smp_init_cpus(void); | |
47 | ||
1da177e4 LT |
48 | /* |
49 | * Move global data into per-processor storage. | |
50 | */ | |
51 | extern void smp_store_cpu_info(unsigned int cpuid); | |
52 | ||
53 | /* | |
54 | * Raise an IPI cross call on CPUs in callmap. | |
55 | */ | |
56 | extern void smp_cross_call(cpumask_t callmap); | |
57 | ||
dbebb4cb RK |
58 | /* |
59 | * Broadcast a timer interrupt to the other CPUs. | |
60 | */ | |
61 | extern void smp_send_timer(void); | |
62 | ||
1da177e4 LT |
63 | /* |
64 | * Boot a secondary CPU, and assign it the specified idle task. | |
65 | * This also gives us the initial stack to use for this CPU. | |
66 | */ | |
67 | extern int boot_secondary(unsigned int cpu, struct task_struct *); | |
68 | ||
3b6353fa RK |
69 | /* |
70 | * Called from platform specific assembly code, this is the | |
71 | * secondary CPU entry point. | |
72 | */ | |
73 | asmlinkage void secondary_start_kernel(void); | |
74 | ||
e65f38ed RK |
75 | /* |
76 | * Perform platform specific initialisation of the specified CPU. | |
77 | */ | |
78 | extern void platform_secondary_init(unsigned int cpu); | |
79 | ||
80 | /* | |
81 | * Initial data for bringing up a secondary CPU. | |
82 | */ | |
83 | struct secondary_data { | |
84 | unsigned long pgdir; | |
85 | void *stack; | |
86 | }; | |
87 | extern struct secondary_data secondary_data; | |
88 | ||
a054a811 RK |
89 | extern int __cpu_disable(void); |
90 | extern int mach_cpu_disable(unsigned int cpu); | |
91 | ||
92 | extern void __cpu_die(unsigned int cpu); | |
93 | extern void cpu_die(void); | |
94 | ||
95 | extern void platform_cpu_die(unsigned int cpu); | |
96 | extern int platform_cpu_kill(unsigned int cpu); | |
97 | extern void platform_cpu_enable(unsigned int cpu); | |
98 | ||
37ee16ae RK |
99 | #ifdef CONFIG_LOCAL_TIMERS |
100 | /* | |
101 | * Setup a local timer interrupt for a CPU. | |
102 | */ | |
103 | extern void local_timer_setup(unsigned int cpu); | |
104 | ||
105 | /* | |
106 | * Stop a local timer interrupt. | |
107 | */ | |
108 | extern void local_timer_stop(unsigned int cpu); | |
109 | ||
110 | /* | |
111 | * Platform provides this to acknowledge a local timer IRQ | |
112 | */ | |
113 | extern int local_timer_ack(void); | |
114 | ||
115 | #else | |
116 | ||
117 | static inline void local_timer_setup(unsigned int cpu) | |
118 | { | |
119 | } | |
120 | ||
121 | static inline void local_timer_stop(unsigned int cpu) | |
122 | { | |
123 | } | |
124 | ||
125 | #endif | |
126 | ||
127 | /* | |
128 | * show local interrupt info | |
129 | */ | |
130 | extern void show_local_irqs(struct seq_file *); | |
131 | ||
132 | /* | |
133 | * Called from assembly, this is the local timer IRQ handler | |
134 | */ | |
135 | asmlinkage void do_local_timer(struct pt_regs *); | |
136 | ||
1da177e4 | 137 | #endif /* ifndef __ASM_ARM_SMP_H */ |