79 lines
2.9 KiB
C
79 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 1990 University of Utah.
|
|
* Copyright (c) 1991 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.
|
|
*
|
|
* @(#)device_pager.h 7.1 (Berkeley) 12/5/90
|
|
*/
|
|
|
|
#ifndef _VM_DEVICE_PAGER_H_
|
|
#define _VM_DEVICE_PAGER_H_
|
|
|
|
/*
|
|
* Device pager private data.
|
|
*/
|
|
struct devpager {
|
|
queue_head_t devp_list; /* list of managed devices */
|
|
dev_t devp_dev; /* devno of device */
|
|
vm_page_t devp_pages; /* page structs for device */
|
|
int devp_npages; /* size of device in pages */
|
|
int devp_count; /* reference count */
|
|
vm_object_t devp_object; /* object representing this device */
|
|
};
|
|
typedef struct devpager *dev_pager_t;
|
|
|
|
#define DEV_PAGER_NULL ((dev_pager_t)0)
|
|
|
|
#ifdef KERNEL
|
|
|
|
void dev_pager_init();
|
|
vm_pager_t dev_pager_alloc();
|
|
void dev_pager_dealloc();
|
|
boolean_t dev_pager_getpage(), dev_pager_putpage();
|
|
boolean_t dev_pager_haspage();
|
|
|
|
struct pagerops devicepagerops = {
|
|
dev_pager_init,
|
|
dev_pager_alloc,
|
|
dev_pager_dealloc,
|
|
dev_pager_getpage,
|
|
dev_pager_putpage,
|
|
dev_pager_haspage
|
|
};
|
|
|
|
#endif
|
|
|
|
#endif /* !_VM_DEVICE_PAGER_H_ */
|