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 31 struct seq_file; 32 33 /* 34 * generate IPI list text 35 */ 36 extern void show_ipi_list(struct seq_file *, int); 37 38 /* 39 * Called from assembly code, this handles an IPI. 40 */ 41 asmlinkage void do_IPI(int ipinr, struct pt_regs *regs); 42 43 /* 44 * Setup the set of possible CPUs (via set_cpu_possible) 45 */ 46 extern void smp_init_cpus(void); 47 48 49 /* 50 * Raise an IPI cross call on CPUs in callmap. 51 */ 52 extern void smp_cross_call(const struct cpumask *mask, int ipi); 53 54 /* 55 * Boot a secondary CPU, and assign it the specified idle task. 56 * This also gives us the initial stack to use for this CPU. 57 */ 58 extern int boot_secondary(unsigned int cpu, struct task_struct *); 59 60 /* 61 * Called from platform specific assembly code, this is the 62 * secondary CPU entry point. 63 */ 64 asmlinkage void secondary_start_kernel(void); 65 66 /* 67 * Perform platform specific initialisation of the specified CPU. 68 */ 69 extern void platform_secondary_init(unsigned int cpu); 70 71 /* 72 * Initialize cpu_possible map, and enable coherency 73 */ 74 extern void platform_smp_prepare_cpus(unsigned int); 75 76 /* 77 * Initial data for bringing up a secondary CPU. 78 */ 79 struct secondary_data { 80 unsigned long pgdir; 81 void *stack; 82 }; 83 extern struct secondary_data secondary_data; 84 85 extern int __cpu_disable(void); 86 extern int platform_cpu_disable(unsigned int cpu); 87 88 extern void __cpu_die(unsigned int cpu); 89 extern void cpu_die(void); 90 91 extern void platform_cpu_die(unsigned int cpu); 92 extern int platform_cpu_kill(unsigned int cpu); 93 extern void platform_cpu_enable(unsigned int cpu); 94 95 extern void arch_send_call_function_single_ipi(int cpu); 96 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 97 98 /* 99 * show local interrupt info 100 */ 101 extern void show_local_irqs(struct seq_file *, int); 102 103 #endif /* ifndef __ASM_ARM_SMP_H */ 104