1/* 2 * arch/arm/include/asm/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 13#include <linux/threads.h> 14#include <linux/cpumask.h> 15#include <linux/thread_info.h> 16 17#include <mach/smp.h> 18 19#ifndef CONFIG_SMP 20# error "<asm/smp.h> included in non-SMP build" 21#endif 22 23#define raw_smp_processor_id() (current_thread_info()->cpu) 24 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 31struct seq_file; 32 33/* 34 * generate IPI list text 35 */ 36extern void show_ipi_list(struct seq_file *p); 37 38/* 39 * Called from assembly code, this handles an IPI. 40 */ 41asmlinkage void do_IPI(struct pt_regs *regs); 42 43/* 44 * Setup the set of possible CPUs (via set_cpu_possible) 45 */ 46extern void smp_init_cpus(void); 47 48/* 49 * Move global data into per-processor storage. 50 */ 51extern void smp_store_cpu_info(unsigned int cpuid); 52 53/* 54 * Raise an IPI cross call on CPUs in callmap. 55 */ 56extern void smp_cross_call(const struct cpumask *mask); 57 58/* 59 * Boot a secondary CPU, and assign it the specified idle task. 60 * This also gives us the initial stack to use for this CPU. 61 */ 62extern int boot_secondary(unsigned int cpu, struct task_struct *); 63 64/* 65 * Called from platform specific assembly code, this is the 66 * secondary CPU entry point. 67 */ 68asmlinkage void secondary_start_kernel(void); 69 70/* 71 * Perform platform specific initialisation of the specified CPU. 72 */ 73extern void platform_secondary_init(unsigned int cpu); 74 75/* 76 * Initial data for bringing up a secondary CPU. 77 */ 78struct secondary_data { 79 unsigned long pgdir; 80 void *stack; 81}; 82extern struct secondary_data secondary_data; 83 84extern int __cpu_disable(void); 85extern int platform_cpu_disable(unsigned int cpu); 86 87extern void __cpu_die(unsigned int cpu); 88extern void cpu_die(void); 89 90extern void platform_cpu_die(unsigned int cpu); 91extern int platform_cpu_kill(unsigned int cpu); 92extern void platform_cpu_enable(unsigned int cpu); 93 94extern void arch_send_call_function_single_ipi(int cpu); 95extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 96 97/* 98 * show local interrupt info 99 */ 100extern void show_local_irqs(struct seq_file *); 101 102#endif /* ifndef __ASM_ARM_SMP_H */ 103