a3f0842419
vm_mtx does not recurse and is required for most low level vm operations. faults can not be taken without holding Giant. Memory subsystems can now call the base page allocators safely. Almost all atomic ops were removed as they are covered under the vm mutex. Alpha and ia64 now need to catch up to i386's trap handlers. FFS and NFS have been tested, other filesystems will need minor changes (grabbing the vm lock when twiddling page properties). Reviewed (partially) by: jake, jhb
121 lines
4.4 KiB
C
121 lines
4.4 KiB
C
/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)vm.h 8.2 (Berkeley) 12/13/93
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* @(#)vm_prot.h 8.1 (Berkeley) 6/11/93
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* @(#)vm_inherit.h 8.1 (Berkeley) 6/11/93
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*
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* Copyright (c) 1987, 1990 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Authors: Avadis Tevanian, Jr., Michael Wayne Young
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*
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* $FreeBSD$
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*/
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#ifndef VM_H
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#define VM_H
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typedef char vm_inherit_t; /* inheritance codes */
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#define VM_INHERIT_SHARE ((vm_inherit_t) 0)
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#define VM_INHERIT_COPY ((vm_inherit_t) 1)
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#define VM_INHERIT_NONE ((vm_inherit_t) 2)
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#define VM_INHERIT_DEFAULT VM_INHERIT_COPY
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typedef u_char vm_prot_t; /* protection codes */
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#define VM_PROT_NONE ((vm_prot_t) 0x00)
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#define VM_PROT_READ ((vm_prot_t) 0x01)
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#define VM_PROT_WRITE ((vm_prot_t) 0x02)
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#define VM_PROT_EXECUTE ((vm_prot_t) 0x04)
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#define VM_PROT_OVERRIDE_WRITE ((vm_prot_t) 0x08) /* copy-on-write */
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#define VM_PROT_ALL (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
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#define VM_PROT_DEFAULT VM_PROT_ALL
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union vm_map_object;
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typedef union vm_map_object vm_map_object_t;
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struct vm_map_entry;
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typedef struct vm_map_entry *vm_map_entry_t;
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struct vm_map;
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typedef struct vm_map *vm_map_t;
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struct vm_object;
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typedef struct vm_object *vm_object_t;
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#ifdef _KERNEL
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extern struct mtx vm_mtx;
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#endif
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#ifndef _KERNEL
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/*
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* This is defined in <sys/types.h> for the kernel so that non-vm kernel
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* sources (mainly Mach-derived ones such as ddb) don't have to include
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* vm stuff. Defining it there for applications might break things.
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* Define it here for "applications" that include vm headers (e.g.,
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* genassym).
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*/
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typedef int boolean_t;
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/*
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* This is defined in <sys/types.h> for the kernel so that vnode_if.h
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* doesn't have to include <vm/vm.h>.
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*/
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struct vm_page;
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typedef struct vm_page *vm_page_t;
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#endif
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#endif /* VM_H */
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