| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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/module.h> |
| 27 | #include <linux/sched.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/init_task.h> |
| 30 | #include <linux/mqueue.h> |
| 31 | |
| 32 | #include <asm/uaccess.h> |
| 33 | #include <asm/pgtable.h> |
| 34 | #include <asm/pgalloc.h> |
| 35 | |
| 36 | static struct fs_struct init_fs = INIT_FS; |
| 37 | static struct files_struct init_files = INIT_FILES; |
| 38 | static struct signal_struct init_signals = INIT_SIGNALS(init_signals); |
| 39 | static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); |
| 40 | struct mm_struct init_mm = INIT_MM(init_mm); |
| 41 | |
| 42 | EXPORT_SYMBOL(init_mm); |
| 43 | |
| 44 | /* |
| 45 | * Initial task structure. |
| 46 | * |
| 47 | * We need to make sure that this is 16384-byte aligned due to the |
| 48 | * way process stacks are handled. This is done by having a special |
| 49 | * "init_task" linker map entry.. |
| 50 | */ |
| 51 | unsigned char interrupt_stack[ISTACK_SIZE] __attribute__ ((section("init_istack"), aligned(4096))); |
| 52 | union thread_union init_thread_union |
| 53 | __attribute__((aligned(128))) __attribute__((__section__(".data.init_task"))) = |
| 54 | { INIT_THREAD_INFO(init_task) }; |
| 55 | |
| 56 | #ifdef __LP64__ |
| 57 | /* NOTE: This layout exactly conforms to the hybrid L2/L3 page table layout |
| 58 | * with the first pmd adjacent to the pgd and below it. gcc doesn't actually |
| 59 | * guarantee that global objects will be laid out in memory in the same order |
| 60 | * as the order of declaration, so put these in different sections and use |
| 61 | * the linker script to order them. */ |
| 62 | pmd_t pmd0[PTRS_PER_PMD] __attribute__ ((aligned(PAGE_SIZE))) __attribute__ ((__section__ (".data.vm0.pmd"))) = { {0}, }; |
| 63 | |
| 64 | #endif |
| 65 | pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__ ((aligned(PAGE_SIZE))) __attribute__ ((__section__ (".data.vm0.pgd"))) = { {0}, }; |
| 66 | pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __attribute__ ((aligned(PAGE_SIZE))) __attribute__ ((__section__ (".data.vm0.pte"))) = { {0}, }; |
| 67 | |
| 68 | /* |
| 69 | * Initial task structure. |
| 70 | * |
| 71 | * All other task structs will be allocated on slabs in fork.c |
| 72 | */ |
| 73 | EXPORT_SYMBOL(init_task); |
| 74 | |
| 75 | __asm__(".data"); |
| 76 | struct task_struct init_task = INIT_TASK(init_task); |