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 *p); 37 38 /* 39 * Called from assembly code, this handles an IPI. 40 */ 41 asmlinkage void do_IPI(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 * Move global data into per-processor storage. 50 */ 51 extern void smp_store_cpu_info(unsigned int cpuid); 52 53 /* 54 * Raise an IPI cross call on CPUs in callmap. 55 */ 56 extern 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 */ 62 extern 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 */ 68 asmlinkage void secondary_start_kernel(void); 69 70 /* 71 * Perform platform specific initialisation of the specified CPU. 72 */ 73 extern void platform_secondary_init(unsigned int cpu); 74 75 /* 76 * Initial data for bringing up a secondary CPU. 77 */ 78 struct secondary_data { 79 unsigned long pgdir; 80 void *stack; 81 }; 82 extern struct secondary_data secondary_data; 83 84 extern int __cpu_disable(void); 85 extern int mach_cpu_disable(unsigned int cpu); 86 87 extern void __cpu_die(unsigned int cpu); 88 extern void cpu_die(void); 89 90 extern void platform_cpu_die(unsigned int cpu); 91 extern int platform_cpu_kill(unsigned int cpu); 92 extern void platform_cpu_enable(unsigned int cpu); 93 94 extern void arch_send_call_function_single_ipi(int cpu); 95 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 96 97 /* 98 * show local interrupt info 99 */ 100 extern void show_local_irqs(struct seq_file *); 101 102 #endif /* ifndef __ASM_ARM_SMP_H */ 103