2 * arch/arm/include/asm/smp.h
4 * Copyright (C) 2004-2005 ARM Ltd.
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.
10 #ifndef __ASM_ARM_SMP_H
11 #define __ASM_ARM_SMP_H
13 #include <linux/threads.h>
14 #include <linux/cpumask.h>
15 #include <linux/thread_info.h>
18 # error "<asm/smp.h> included in non-SMP build"
21 #define raw_smp_processor_id() (current_thread_info()->cpu)
24 * at the moment, there's not a big penalty for changing CPUs
25 * (the >big< penalty is running SMP in the first place)
27 #define PROC_CHANGE_PENALTY 15
32 * generate IPI list text
34 extern void show_ipi_list(struct seq_file *, int);
37 * Called from assembly code, this handles an IPI.
39 asmlinkage void do_IPI(int ipinr, struct pt_regs *regs);
42 * Setup the set of possible CPUs (via set_cpu_possible)
44 extern void smp_init_cpus(void);
48 * Provide a function to raise an IPI cross call on CPUs in callmap.
50 extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
53 * Boot a secondary CPU, and assign it the specified idle task.
54 * This also gives us the initial stack to use for this CPU.
56 extern int boot_secondary(unsigned int cpu, struct task_struct *);
59 * Called from platform specific assembly code, this is the
60 * secondary CPU entry point.
62 asmlinkage void secondary_start_kernel(void);
65 * Perform platform specific initialisation of the specified CPU.
67 extern void platform_secondary_init(unsigned int cpu);
70 * Initialize cpu_possible map, and enable coherency
72 extern void platform_smp_prepare_cpus(unsigned int);
75 * Initial data for bringing up a secondary CPU.
77 struct secondary_data {
81 extern struct secondary_data secondary_data;
83 extern int __cpu_disable(void);
84 extern int platform_cpu_disable(unsigned int cpu);
86 extern void __cpu_die(unsigned int cpu);
87 extern void cpu_die(void);
89 extern void platform_cpu_die(unsigned int cpu);
90 extern int platform_cpu_kill(unsigned int cpu);
91 extern void platform_cpu_enable(unsigned int cpu);
93 extern void arch_send_call_function_single_ipi(int cpu);
94 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
97 * show local interrupt info
99 extern void show_local_irqs(struct seq_file *, int);
101 #endif /* ifndef __ASM_ARM_SMP_H */