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- /*
- * 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 _DEVICE_PAGER_
- #define _DEVICE_PAGER_ 1
-
- /*
- * 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 /* _DEVICE_PAGER_ */
-