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 23 struct seq_file; 24 25 /* 26 * generate IPI list text 27 */ 28 extern void show_ipi_list(struct seq_file *, int); 29 30 /* 31 * Called from assembly code, this handles an IPI. 32 */ 33 asmlinkage void do_IPI(int ipinr, struct pt_regs *regs); 34 35 /* 36 * Setup the set of possible CPUs (via set_cpu_possible) 37 */ 38 extern void smp_init_cpus(void); 39 40 41 /* 42 * Provide a function to raise an IPI cross call on CPUs in callmap. 43 */ 44 extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int)); 45 46 /* 47 * Boot a secondary CPU, and assign it the specified idle task. 48 * This also gives us the initial stack to use for this CPU. 49 */ 50 extern int boot_secondary(unsigned int cpu, struct task_struct *); 51 52 /* 53 * Called from platform specific assembly code, this is the 54 * secondary CPU entry point. 55 */ 56 asmlinkage void secondary_start_kernel(void); 57 58 /* 59 * Perform platform specific initialisation of the specified CPU. 60 */ 61 extern void platform_secondary_init(unsigned int cpu); 62 63 /* 64 * Initialize cpu_possible map, and enable coherency 65 */ 66 extern void platform_smp_prepare_cpus(unsigned int); 67 68 /* 69 * Initial data for bringing up a secondary CPU. 70 */ 71 struct secondary_data { 72 unsigned long pgdir; 73 unsigned long swapper_pg_dir; 74 void *stack; 75 }; 76 extern struct secondary_data secondary_data; 77 78 extern int __cpu_disable(void); 79 extern int platform_cpu_disable(unsigned int cpu); 80 81 extern void __cpu_die(unsigned int cpu); 82 extern void cpu_die(void); 83 84 extern void platform_cpu_die(unsigned int cpu); 85 extern int platform_cpu_kill(unsigned int cpu); 86 extern void platform_cpu_enable(unsigned int cpu); 87 88 extern void arch_send_call_function_single_ipi(int cpu); 89 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 90 91 /* 92 * show local interrupt info 93 */ 94 extern void show_local_irqs(struct seq_file *, int); 95 96 #endif /* ifndef __ASM_ARM_SMP_H */ 97