1/* 2 * Static declaration of "init" task data structure. 3 * 4 * Copyright (C) 2000 Paul Bame <bame at parisc-linux.org> 5 * Copyright (C) 2000-2001 John Marvin <jsm at parisc-linux.org> 6 * Copyright (C) 2001 Helge Deller <deller @ parisc-linux.org> 7 * Copyright (C) 2002 Matthew Wilcox <willy with parisc-linux.org> 8 * 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 */ 24 25#include <linux/mm.h> 26#include <linux/fs.h> 27#include <linux/module.h> 28#include <linux/sched.h> 29#include <linux/init.h> 30#include <linux/init_task.h> 31#include <linux/mqueue.h> 32 33#include <asm/uaccess.h> 34#include <asm/pgtable.h> 35#include <asm/pgalloc.h> 36 37static struct signal_struct init_signals = INIT_SIGNALS(init_signals); 38static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); 39/* 40 * Initial task structure. 41 * 42 * We need to make sure that this is 16384-byte aligned due to the 43 * way process stacks are handled. This is done by having a special 44 * "init_task" linker map entry.. 45 */ 46union thread_union init_thread_union __init_task_data 47 __attribute__((aligned(128))) = 48 { INIT_THREAD_INFO(init_task) }; 49 50#if PT_NLEVELS == 3 51/* NOTE: This layout exactly conforms to the hybrid L2/L3 page table layout 52 * with the first pmd adjacent to the pgd and below it. gcc doesn't actually 53 * guarantee that global objects will be laid out in memory in the same order 54 * as the order of declaration, so put these in different sections and use 55 * the linker script to order them. */ 56pmd_t pmd0[PTRS_PER_PMD] __attribute__ ((__section__ (".data..vm0.pmd"), aligned(PAGE_SIZE))); 57#endif 58 59pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__ ((__section__ (".data..vm0.pgd"), aligned(PAGE_SIZE))); 60pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __attribute__ ((__section__ (".data..vm0.pte"), aligned(PAGE_SIZE))); 61 62/* 63 * Initial task structure. 64 * 65 * All other task structs will be allocated on slabs in fork.c 66 */ 67EXPORT_SYMBOL(init_task); 68 69__asm__(".data"); 70struct task_struct init_task = INIT_TASK(init_task); 71