/* * 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: vm_pager.h,v 1.14 1997/10/12 20:26:32 phk Exp $ */ /* * Pager routine interface definition. */ #ifndef _VM_PAGER_ #define _VM_PAGER_ #include 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 #ifdef MALLOC_DECLARE MALLOC_DECLARE(M_VMPGDATA); #endif 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_ */