1 /* 2 * Copyright 2010 Tilera Corporation. All Rights Reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation, version 2. 7 * 8 * This program is distributed in the hope that it will be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 11 * NON INFRINGEMENT. See the GNU General Public License for 12 * more details. 13 */ 14 15 #include <linux/mm.h> 16 #include <linux/fs.h> 17 #include <linux/init_task.h> 18 #include <linux/mqueue.h> 19 #include <linux/module.h> 20 #include <linux/start_kernel.h> 21 #include <linux/uaccess.h> 22 23 static struct signal_struct init_signals = INIT_SIGNALS(init_signals); 24 static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); 25 26 /* 27 * Initial thread structure. 28 * 29 * We need to make sure that this is THREAD_SIZE aligned due to the 30 * way process stacks are handled. This is done by having a special 31 * "init_task" linker map entry.. 32 */ 33 union thread_union init_thread_union __init_task_data = { 34 INIT_THREAD_INFO(init_task) 35 }; 36 37 /* 38 * Initial task structure. 39 * 40 * All other task structs will be allocated on slabs in fork.c 41 */ 42 struct task_struct init_task = INIT_TASK(init_task); 43 EXPORT_SYMBOL(init_task); 44 45 /* 46 * per-CPU stack and boot info. 47 */ 48 DEFINE_PER_CPU(unsigned long, boot_sp) = 49 (unsigned long)init_stack + THREAD_SIZE; 50 51 #ifdef CONFIG_SMP 52 DEFINE_PER_CPU(unsigned long, boot_pc) = (unsigned long)start_kernel; 53 #else 54 /* 55 * The variable must be __initdata since it references __init code. 56 * With CONFIG_SMP it is per-cpu data, which is exempt from validation. 57 */ 58 unsigned long __initdata boot_pc = (unsigned long)start_kernel; 59 #endif 60