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 * Called from platform specific assembly code, this is the 53 * secondary CPU entry point. 54 */ 55 asmlinkage void secondary_start_kernel(void); 56 57 58 /* 59 * Initial data for bringing up a secondary CPU. 60 */ 61 struct secondary_data { 62 union { 63 unsigned long mpu_rgn_szr; 64 u64 pgdir; 65 }; 66 unsigned long swapper_pg_dir; 67 void *stack; 68 }; 69 extern struct secondary_data secondary_data; 70 extern volatile int pen_release; 71 extern void secondary_startup(void); 72 73 extern int __cpu_disable(void); 74 75 extern void __cpu_die(unsigned int cpu); 76 extern void cpu_die(void); 77 78 extern void arch_send_call_function_single_ipi(int cpu); 79 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 80 extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask); 81 82 extern int register_ipi_completion(struct completion *completion, int cpu); 83 84 extern void smp_send_all_cpu_backtrace(void); 85 86 struct smp_operations { 87 #ifdef CONFIG_SMP 88 /* 89 * Setup the set of possible CPUs (via set_cpu_possible) 90 */ 91 void (*smp_init_cpus)(void); 92 /* 93 * Initialize cpu_possible map, and enable coherency 94 */ 95 void (*smp_prepare_cpus)(unsigned int max_cpus); 96 97 /* 98 * Perform platform specific initialisation of the specified CPU. 99 */ 100 void (*smp_secondary_init)(unsigned int cpu); 101 /* 102 * Boot a secondary CPU, and assign it the specified idle task. 103 * This also gives us the initial stack to use for this CPU. 104 */ 105 int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle); 106 #ifdef CONFIG_HOTPLUG_CPU 107 int (*cpu_kill)(unsigned int cpu); 108 void (*cpu_die)(unsigned int cpu); 109 int (*cpu_disable)(unsigned int cpu); 110 #endif 111 #endif 112 }; 113 114 struct of_cpu_method { 115 const char *method; 116 struct smp_operations *ops; 117 }; 118 119 #define CPU_METHOD_OF_DECLARE(name, _method, _ops) \ 120 static const struct of_cpu_method __cpu_method_of_table_##name \ 121 __used __section(__cpu_method_of_table) \ 122 = { .method = _method, .ops = _ops } 123 /* 124 * set platform specific SMP operations 125 */ 126 extern void smp_set_ops(struct smp_operations *); 127 128 #endif /* ifndef __ASM_ARM_SMP_H */ 129