diff options
Diffstat (limited to 'arch/parisc/kernel/init_task.c')
| -rw-r--r-- | arch/parisc/kernel/init_task.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/arch/parisc/kernel/init_task.c b/arch/parisc/kernel/init_task.c new file mode 100644 index 00000000000..7e898fd6441 --- /dev/null +++ b/arch/parisc/kernel/init_task.c @@ -0,0 +1,76 @@ +/* + * Static declaration of "init" task data structure. + * + * Copyright (C) 2000 Paul Bame <bame at parisc-linux.org> + * Copyright (C) 2000-2001 John Marvin <jsm at parisc-linux.org> + * Copyright (C) 2001 Helge Deller <deller @ parisc-linux.org> + * Copyright (C) 2002 Matthew Wilcox <willy with parisc-linux.org> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/init.h> +#include <linux/init_task.h> +#include <linux/mqueue.h> + +#include <asm/uaccess.h> +#include <asm/pgtable.h> +#include <asm/pgalloc.h> + +static struct fs_struct init_fs = INIT_FS; +static struct files_struct init_files = INIT_FILES; +static struct signal_struct init_signals = INIT_SIGNALS(init_signals); +static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); +struct mm_struct init_mm = INIT_MM(init_mm); + +EXPORT_SYMBOL(init_mm); + +/* + * Initial task structure. + * + * We need to make sure that this is 16384-byte aligned due to the + * way process stacks are handled. This is done by having a special + * "init_task" linker map entry.. + */ +unsigned char interrupt_stack[ISTACK_SIZE] __attribute__ ((section("init_istack"), aligned(4096))); +union thread_union init_thread_union + __attribute__((aligned(128))) __attribute__((__section__(".data.init_task"))) = + { INIT_THREAD_INFO(init_task) }; + +#ifdef __LP64__ +/* NOTE: This layout exactly conforms to the hybrid L2/L3 page table layout + * with the first pmd adjacent to the pgd and below it. gcc doesn't actually + * guarantee that global objects will be laid out in memory in the same order + * as the order of declaration, so put these in different sections and use + * the linker script to order them. */ +pmd_t pmd0[PTRS_PER_PMD] __attribute__ ((aligned(PAGE_SIZE))) __attribute__ ((__section__ (".data.vm0.pmd"))) = { {0}, }; + +#endif +pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__ ((aligned(PAGE_SIZE))) __attribute__ ((__section__ (".data.vm0.pgd"))) = { {0}, }; +pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __attribute__ ((aligned(PAGE_SIZE))) __attribute__ ((__section__ (".data.vm0.pte"))) = { {0}, }; + +/* + * Initial task structure. + * + * All other task structs will be allocated on slabs in fork.c + */ +EXPORT_SYMBOL(init_task); + +__asm__(".data"); +struct task_struct init_task = INIT_TASK(init_task); |