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)
26 * generate IPI list text
28 extern void show_ipi_list(struct seq_file *, int);
31 * Called from assembly code, this handles an IPI.
33 asmlinkage void do_IPI(int ipinr, struct pt_regs *regs);
36 * Called from C code, this handles an IPI.
38 void handle_IPI(int ipinr, struct pt_regs *regs);
41 * Setup the set of possible CPUs (via set_cpu_possible)
43 extern void smp_init_cpus(void);
47 * Provide a function to raise an IPI cross call on CPUs in callmap.
49 extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
52 * Boot a secondary CPU, and assign it the specified idle task.
53 * This also gives us the initial stack to use for this CPU.
55 extern int boot_secondary(unsigned int cpu, struct task_struct *);
58 * Called from platform specific assembly code, this is the
59 * secondary CPU entry point.
61 asmlinkage void secondary_start_kernel(void);
65 * Initial data for bringing up a secondary CPU.
67 struct secondary_data {
69 unsigned long swapper_pg_dir;
72 extern struct secondary_data secondary_data;
73 extern volatile int pen_release;
75 extern int __cpu_disable(void);
77 extern void __cpu_die(unsigned int cpu);
78 extern void cpu_die(void);
80 extern void arch_send_call_function_single_ipi(int cpu);
81 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
83 struct smp_operations {
86 * Setup the set of possible CPUs (via set_cpu_possible)
88 void (*smp_init_cpus)(void);
90 * Initialize cpu_possible map, and enable coherency
92 void (*smp_prepare_cpus)(unsigned int max_cpus);
95 * Perform platform specific initialisation of the specified CPU.
97 void (*smp_secondary_init)(unsigned int cpu);
99 * Boot a secondary CPU, and assign it the specified idle task.
100 * This also gives us the initial stack to use for this CPU.
102 int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle);
103 #ifdef CONFIG_HOTPLUG_CPU
104 int (*cpu_kill)(unsigned int cpu);
105 void (*cpu_die)(unsigned int cpu);
106 int (*cpu_disable)(unsigned int cpu);
112 * set platform specific SMP operations
114 extern void smp_set_ops(struct smp_operations *);
116 #endif /* ifndef __ASM_ARM_SMP_H */