Merge remote-tracking branch 's5p/for-next'
[linux-2.6/next.git] / arch / parisc / kernel / init_task.c
blob4a91e433416f17b4f0df48a7e66035cde928303f
1 /*
2 * Static declaration of "init" task data structure.
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>
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.
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.
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
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>
33 #include <asm/uaccess.h>
34 #include <asm/pgtable.h>
35 #include <asm/pgalloc.h>
37 static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
38 static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
40 * Initial task structure.
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..
46 union thread_union init_thread_union __init_task_data
47 __attribute__((aligned(128))) =
48 { INIT_THREAD_INFO(init_task) };
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. */
56 pmd_t pmd0[PTRS_PER_PMD] __attribute__ ((__section__ (".data..vm0.pmd"), aligned(PAGE_SIZE)));
57 #endif
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)));
63 * Initial task structure.
65 * All other task structs will be allocated on slabs in fork.c
67 EXPORT_SYMBOL(init_task);
69 __asm__(".data");
70 struct task_struct init_task = INIT_TASK(init_task);