97 lines
4.0 KiB
C
97 lines
4.0 KiB
C
/*
|
|
* Copyright (c) 1990 University of Utah.
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* the Systems Programming Group of the University of Utah Computer
|
|
* Science Department.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)vm_pager.h 8.4 (Berkeley) 1/12/94
|
|
* $Id$
|
|
*/
|
|
|
|
/*
|
|
* Pager routine interface definition.
|
|
*/
|
|
|
|
#ifndef _VM_PAGER_
|
|
#define _VM_PAGER_
|
|
|
|
TAILQ_HEAD(pagerlst, vm_object);
|
|
|
|
struct pagerops {
|
|
void (*pgo_init) __P((void)); /* Initialize pager. */
|
|
vm_object_t (*pgo_alloc) __P((void *, vm_size_t, vm_prot_t, vm_ooffset_t)); /* Allocate pager. */
|
|
void (*pgo_dealloc) __P((vm_object_t)); /* Disassociate. */
|
|
int (*pgo_getpages) __P((vm_object_t, vm_page_t *, int, int)); /* Get (read) page. */
|
|
int (*pgo_putpages) __P((vm_object_t, vm_page_t *, int, boolean_t, int *)); /* Put (write) page. */
|
|
boolean_t (*pgo_haspage) __P((vm_object_t, vm_pindex_t, int *, int *)); /* Does pager have page? */
|
|
void (*pgo_sync) __P((void));
|
|
};
|
|
|
|
/*
|
|
* get/put return values
|
|
* OK operation was successful
|
|
* BAD specified data was out of the accepted range
|
|
* FAIL specified data was in range, but doesn't exist
|
|
* PEND operations was initiated but not completed
|
|
* ERROR error while accessing data that is in range and exists
|
|
* AGAIN temporary resource shortage prevented operation from happening
|
|
*/
|
|
#define VM_PAGER_OK 0
|
|
#define VM_PAGER_BAD 1
|
|
#define VM_PAGER_FAIL 2
|
|
#define VM_PAGER_PEND 3
|
|
#define VM_PAGER_ERROR 4
|
|
#define VM_PAGER_AGAIN 5
|
|
|
|
#ifdef KERNEL
|
|
extern vm_map_t pager_map;
|
|
extern int pager_map_size;
|
|
|
|
vm_object_t vm_pager_allocate __P((objtype_t, void *, vm_size_t, vm_prot_t, vm_ooffset_t));
|
|
void vm_pager_bufferinit __P((void));
|
|
void vm_pager_deallocate __P((vm_object_t));
|
|
int vm_pager_get_pages __P((vm_object_t, vm_page_t *, int, int));
|
|
boolean_t vm_pager_has_page __P((vm_object_t, vm_pindex_t, int *, int *));
|
|
void vm_pager_init __P((void));
|
|
vm_object_t vm_pager_object_lookup __P((struct pagerlst *, void *));
|
|
vm_offset_t vm_pager_map_pages __P((vm_page_t *, int, boolean_t));
|
|
vm_offset_t vm_pager_map_page __P((vm_page_t));
|
|
int vm_pager_put_pages __P((vm_object_t, vm_page_t *, int, boolean_t, int *));
|
|
void vm_pager_sync __P((void));
|
|
void vm_pager_unmap_pages __P((vm_offset_t, int));
|
|
void vm_pager_unmap_page __P((vm_offset_t));
|
|
#endif
|
|
|
|
#endif /* _VM_PAGER_ */
|