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2fd8303816
More work towards supporing multiple page sizes on 64-bit. Convert some assumptions that 64bit uses 3 level page tables into testing PT_NLEVELS. Also some BUG() to BUG_ON() conversions and some cleanups to assembler. Signed-off-by: Helge Deller <deller@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
77 lines
2.9 KiB
C
77 lines
2.9 KiB
C
/*
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* Static declaration of "init" task data structure.
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*
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* Copyright (C) 2000 Paul Bame <bame at parisc-linux.org>
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* Copyright (C) 2000-2001 John Marvin <jsm at parisc-linux.org>
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* Copyright (C) 2001 Helge Deller <deller @ parisc-linux.org>
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* Copyright (C) 2002 Matthew Wilcox <willy with parisc-linux.org>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/init.h>
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#include <linux/init_task.h>
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#include <linux/mqueue.h>
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#include <asm/uaccess.h>
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#include <asm/pgtable.h>
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#include <asm/pgalloc.h>
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static struct fs_struct init_fs = INIT_FS;
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static struct files_struct init_files = INIT_FILES;
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static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
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static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
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struct mm_struct init_mm = INIT_MM(init_mm);
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EXPORT_SYMBOL(init_mm);
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/*
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* Initial task structure.
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*
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* We need to make sure that this is 16384-byte aligned due to the
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* way process stacks are handled. This is done by having a special
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* "init_task" linker map entry..
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*/
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unsigned char interrupt_stack[ISTACK_SIZE] __attribute__ ((section("init_istack"), aligned(4096)));
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union thread_union init_thread_union
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__attribute__((aligned(128))) __attribute__((__section__(".data.init_task"))) =
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{ INIT_THREAD_INFO(init_task) };
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#if PT_NLEVELS == 3
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/* NOTE: This layout exactly conforms to the hybrid L2/L3 page table layout
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* with the first pmd adjacent to the pgd and below it. gcc doesn't actually
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* guarantee that global objects will be laid out in memory in the same order
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* as the order of declaration, so put these in different sections and use
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* the linker script to order them. */
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pmd_t pmd0[PTRS_PER_PMD] __attribute__ ((__section__ (".data.vm0.pmd"), aligned(PAGE_SIZE)));
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#endif
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pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__ ((__section__ (".data.vm0.pgd"), aligned(PAGE_SIZE)));
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pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __attribute__ ((__section__ (".data.vm0.pte"), aligned(PAGE_SIZE)));
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/*
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* Initial task structure.
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*
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* All other task structs will be allocated on slabs in fork.c
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*/
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EXPORT_SYMBOL(init_task);
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__asm__(".data");
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struct task_struct init_task = INIT_TASK(init_task);
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