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#ifndef CONFIG_SMP 18# error "<asm/smp.h> included in non-SMP build" 19#endif 20 21#define raw_smp_processor_id() (current_thread_info()->cpu) 22 23struct seq_file; 24 25/* 26 * generate IPI list text 27 */ 28extern void show_ipi_list(struct seq_file *, int); 29 30/* 31 * Called from assembly code, this handles an IPI. 32 */ 33asmlinkage void do_IPI(int ipinr, struct pt_regs *regs); 34 35/* 36 * Called from C code, this handles an IPI. 37 */ 38void handle_IPI(int ipinr, struct pt_regs *regs); 39 40/* 41 * Setup the set of possible CPUs (via set_cpu_possible) 42 */ 43extern void smp_init_cpus(void); 44 45 46/* 47 * Provide a function to raise an IPI cross call on CPUs in callmap. 48 */ 49extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int)); 50 51/* 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. 54 */ 55extern int boot_secondary(unsigned int cpu, struct task_struct *); 56 57/* 58 * Called from platform specific assembly code, this is the 59 * secondary CPU entry point. 60 */ 61asmlinkage void secondary_start_kernel(void); 62 63 64/* 65 * Initial data for bringing up a secondary CPU. 66 */ 67struct secondary_data { 68 union { 69 unsigned long mpu_rgn_szr; 70 unsigned long pgdir; 71 }; 72 unsigned long swapper_pg_dir; 73 void *stack; 74}; 75extern struct secondary_data secondary_data; 76extern volatile int pen_release; 77 78extern int __cpu_disable(void); 79 80extern void __cpu_die(unsigned int cpu); 81extern void cpu_die(void); 82 83extern void arch_send_call_function_single_ipi(int cpu); 84extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 85extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask); 86 87struct smp_operations { 88#ifdef CONFIG_SMP 89 /* 90 * Setup the set of possible CPUs (via set_cpu_possible) 91 */ 92 void (*smp_init_cpus)(void); 93 /* 94 * Initialize cpu_possible map, and enable coherency 95 */ 96 void (*smp_prepare_cpus)(unsigned int max_cpus); 97 98 /* 99 * Perform platform specific initialisation of the specified CPU. 100 */ 101 void (*smp_secondary_init)(unsigned int cpu); 102 /* 103 * Boot a secondary CPU, and assign it the specified idle task. 104 * This also gives us the initial stack to use for this CPU. 105 */ 106 int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle); 107#ifdef CONFIG_HOTPLUG_CPU 108 int (*cpu_kill)(unsigned int cpu); 109 void (*cpu_die)(unsigned int cpu); 110 int (*cpu_disable)(unsigned int cpu); 111#endif 112#endif 113}; 114 115/* 116 * set platform specific SMP operations 117 */ 118extern void smp_set_ops(struct smp_operations *); 119 120#endif /* ifndef __ASM_ARM_SMP_H */ 121