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 * Called from C code, this handles an IPI. 37 */ 38 void handle_IPI(int ipinr, struct pt_regs *regs); 39 40 /* 41 * Setup the set of possible CPUs (via set_cpu_possible) 42 */ 43 extern void smp_init_cpus(void); 44 45 46 /* 47 * Provide a function to raise an IPI cross call on CPUs in callmap. 48 */ 49 extern 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 */ 55 extern 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 */ 61 asmlinkage void secondary_start_kernel(void); 62 63 64 /* 65 * Initial data for bringing up a secondary CPU. 66 */ 67 struct 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 }; 75 extern struct secondary_data secondary_data; 76 extern volatile int pen_release; 77 extern void secondary_startup(void); 78 79 extern int __cpu_disable(void); 80 81 extern void __cpu_die(unsigned int cpu); 82 extern void cpu_die(void); 83 84 extern void arch_send_call_function_single_ipi(int cpu); 85 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 86 extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask); 87 88 extern int register_ipi_completion(struct completion *completion, int cpu); 89 90 struct smp_operations { 91 #ifdef CONFIG_SMP 92 /* 93 * Setup the set of possible CPUs (via set_cpu_possible) 94 */ 95 void (*smp_init_cpus)(void); 96 /* 97 * Initialize cpu_possible map, and enable coherency 98 */ 99 void (*smp_prepare_cpus)(unsigned int max_cpus); 100 101 /* 102 * Perform platform specific initialisation of the specified CPU. 103 */ 104 void (*smp_secondary_init)(unsigned int cpu); 105 /* 106 * Boot a secondary CPU, and assign it the specified idle task. 107 * This also gives us the initial stack to use for this CPU. 108 */ 109 int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle); 110 #ifdef CONFIG_HOTPLUG_CPU 111 int (*cpu_kill)(unsigned int cpu); 112 void (*cpu_die)(unsigned int cpu); 113 int (*cpu_disable)(unsigned int cpu); 114 #endif 115 #endif 116 }; 117 118 struct of_cpu_method { 119 const char *method; 120 struct smp_operations *ops; 121 }; 122 123 #define CPU_METHOD_OF_DECLARE(name, _method, _ops) \ 124 static const struct of_cpu_method __cpu_method_of_table_##name \ 125 __used __section(__cpu_method_of_table) \ 126 = { .method = _method, .ops = _ops } 127 /* 128 * set platform specific SMP operations 129 */ 130 extern void smp_set_ops(struct smp_operations *); 131 132 #endif /* ifndef __ASM_ARM_SMP_H */ 133