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1da177e4 LT |
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> | |
4e950f6f | 26 | #include <linux/fs.h> |
1da177e4 LT |
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 | ||
1da177e4 LT |
37 | static struct signal_struct init_signals = INIT_SIGNALS(init_signals); |
38 | static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); | |
1da177e4 LT |
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 | */ | |
d200c922 JP |
46 | union thread_union init_thread_union __init_task_data |
47 | __attribute__((aligned(128))) = | |
1da177e4 LT |
48 | { INIT_THREAD_INFO(init_task) }; |
49 | ||
2fd83038 | 50 | #if PT_NLEVELS == 3 |
1da177e4 LT |
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. */ | |
d56a3c1a | 56 | pmd_t pmd0[PTRS_PER_PMD] __attribute__ ((__section__ (".data..vm0.pmd"), aligned(PAGE_SIZE))); |
1da177e4 | 57 | #endif |
2fd83038 | 58 | |
d56a3c1a DV |
59 | pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__ ((__section__ (".data..vm0.pgd"), aligned(PAGE_SIZE))); |
60 | pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __attribute__ ((__section__ (".data..vm0.pte"), aligned(PAGE_SIZE))); | |
1da177e4 LT |
61 | |
62 | /* | |
63 | * Initial task structure. | |
64 | * | |
65 | * All other task structs will be allocated on slabs in fork.c | |
66 | */ | |
67 | EXPORT_SYMBOL(init_task); | |
68 | ||
69 | __asm__(".data"); | |
70 | struct task_struct init_task = INIT_TASK(init_task); |