/* $NetBSD: uvm_pager.h,v 1.49 2020/05/19 22:22:15 ad Exp $ */ /* * Copyright (c) 1997 Charles D. Cranor and Washington University. * All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * * from: Id: uvm_pager.h,v 1.1.2.14 1998/01/13 19:00:50 chuck Exp */ /* * 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. 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 8.5 (Berkeley) 7/7/94 */ /* * Copyright (c) 1990 University of Utah. * * 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. 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 8.5 (Berkeley) 7/7/94 */ #ifndef _UVM_UVM_PAGER_H_ #define _UVM_UVM_PAGER_H_ /* * uvm_pager.h */ /* * forward structure declarations */ struct uvm_faultinfo; struct uvm_object; /* * pager ops */ struct uvm_pagerops { /* init pager */ void (*pgo_init)(void); /* add reference to obj */ void (*pgo_reference)(struct uvm_object *); /* drop reference to obj */ void (*pgo_detach)(struct uvm_object *); /* special non-standard fault processing */ int (*pgo_fault)(struct uvm_faultinfo *, vaddr_t, struct vm_page **, int, int, vm_prot_t, int); /* get/read pages */ int (*pgo_get)(struct uvm_object *, voff_t, struct vm_page **, int *, int, vm_prot_t, int, int); /* put/write pages */ int (*pgo_put)(struct uvm_object *, voff_t, voff_t, int); /* mark object dirty */ void (*pgo_markdirty)(struct uvm_object *); }; /* pager flags [mostly for flush] */ #define PGO_CLEANIT 0x001 /* write dirty pages to backing store */ #define PGO_SYNCIO 0x002 /* use sync I/O */ #define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */ #define PGO_FREE 0x008 /* free flushed pages */ /* if PGO_FREE is not set then the pages stay where they are. */ #define PGO_ALLPAGES 0x010 /* flush whole object [put] */ #define PGO_JOURNALLOCKED 0x020 /* journal is already locked [get/put] */ #define PGO_LOCKED 0x040 /* fault data structures are locked [get] */ #define PGO_BUSYFAIL 0x080 /* fail if a page is busy [put] */ #define PGO_OVERWRITE 0x200 /* pages will be overwritten before unlocked */ #define PGO_PASTEOF 0x400 /* allow allocation of pages past EOF */ #define PGO_NOBLOCKALLOC 0x800 /* backing block allocation is not needed */ #define PGO_NOTIMESTAMP 0x1000 /* don't mark object accessed/modified */ #define PGO_RECLAIM 0x2000 /* object is being reclaimed */ #define PGO_GLOCKHELD 0x4000 /* genfs_node's lock is already held */ #define PGO_LAZY 0x8000 /* equivalent of MNT_LAZY / FSYNC_LAZY */ /* page we are not interested in getting */ #define PGO_DONTCARE ((struct vm_page *) -1L) /* [get only] */ #ifdef _KERNEL /* * prototypes */ void uvm_pager_init(void); void uvm_pager_realloc_emerg(void); struct vm_page *uvm_pageratop(vaddr_t); vaddr_t uvm_pagermapin(struct vm_page **, int, int); void uvm_pagermapout(vaddr_t, int); extern size_t pager_map_size; /* Flags to uvm_pagermapin() */ #define UVMPAGER_MAPIN_WAITOK 0x01 /* it's okay to wait */ #define UVMPAGER_MAPIN_READ 0x02 /* device -> host */ #define UVMPAGER_MAPIN_WRITE 0x00 /* host -> device (pseudo flag) */ #endif /* _KERNEL */ #endif /* _UVM_UVM_PAGER_H_ */
