1 /* 2 * Copyright (C) 2012 ARM Ltd. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 #ifndef __ASM_SMP_H 17 #define __ASM_SMP_H 18 19 #include <linux/threads.h> 20 #include <linux/cpumask.h> 21 #include <linux/thread_info.h> 22 23 #ifndef CONFIG_SMP 24 # error "<asm/smp.h> included in non-SMP build" 25 #endif 26 27 #define raw_smp_processor_id() (current_thread_info()->cpu) 28 29 struct seq_file; 30 31 /* 32 * generate IPI list text 33 */ 34 extern void show_ipi_list(struct seq_file *p, int prec); 35 36 /* 37 * Called from C code, this handles an IPI. 38 */ 39 extern void handle_IPI(int ipinr, struct pt_regs *regs); 40 41 /* 42 * Discover the set of possible CPUs and determine their 43 * SMP operations. 44 */ 45 extern void of_smp_init_cpus(void); 46 47 /* 48 * Provide a function to raise an IPI cross call on CPUs in callmap. 49 */ 50 extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int)); 51 52 extern void (*__smp_cross_call)(const struct cpumask *, unsigned int); 53 54 /* 55 * Called from the secondary holding pen, this is the secondary CPU entry point. 56 */ 57 asmlinkage void secondary_start_kernel(void); 58 59 /* 60 * Initial data for bringing up a secondary CPU. 61 */ 62 struct secondary_data { 63 void *stack; 64 }; 65 extern struct secondary_data secondary_data; 66 extern void secondary_entry(void); 67 68 extern void arch_send_call_function_single_ipi(int cpu); 69 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 70 71 extern int __cpu_disable(void); 72 73 extern void __cpu_die(unsigned int cpu); 74 extern void cpu_die(void); 75 76 #endif /* ifndef __ASM_SMP_H */ 77