157 lines
5.5 KiB
C
157 lines
5.5 KiB
C
/* $NetBSD: uvm_pager.h,v 1.8 1999/03/24 03:45:28 cgd Exp $ */
|
|
|
|
/*
|
|
* XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE!
|
|
* >>>USE AT YOUR OWN RISK, WORK IS NOT FINISHED<<<
|
|
*/
|
|
/*
|
|
*
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Charles D. Cranor and
|
|
* Washington University.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef _UVM_UVM_PAGER_H_
|
|
#define _UVM_UVM_PAGER_H_
|
|
|
|
/*
|
|
* uvm_pager.h
|
|
*/
|
|
|
|
/*
|
|
* async pager i/o descriptor structure
|
|
*/
|
|
|
|
TAILQ_HEAD(uvm_aiohead, uvm_aiodesc);
|
|
|
|
struct uvm_aiodesc {
|
|
void (*aiodone) __P((struct uvm_aiodesc *));
|
|
/* aio done function */
|
|
vaddr_t kva; /* KVA of mapped page(s) */
|
|
int npages; /* # of pages in I/O req */
|
|
void *pd_ptr; /* pager-dependent pointer */
|
|
TAILQ_ENTRY(uvm_aiodesc) aioq; /* linked list of aio's */
|
|
};
|
|
|
|
/*
|
|
* pager ops
|
|
*/
|
|
|
|
struct uvm_pagerops {
|
|
void (*pgo_init) __P((void));/* init pager */
|
|
void (*pgo_reference) /* add reference to obj */
|
|
__P((struct uvm_object *));
|
|
void (*pgo_detach) /* drop reference to obj */
|
|
__P((struct uvm_object *));
|
|
int (*pgo_fault) /* special nonstd fault fn */
|
|
__P((struct uvm_faultinfo *, vaddr_t,
|
|
vm_page_t *, int, int, vm_fault_t,
|
|
vm_prot_t, int));
|
|
boolean_t (*pgo_flush) /* flush pages out of obj */
|
|
__P((struct uvm_object *, vaddr_t,
|
|
vaddr_t, int));
|
|
int (*pgo_get) /* get/read page */
|
|
__P((struct uvm_object *, vaddr_t,
|
|
vm_page_t *, int *, int, vm_prot_t, int, int));
|
|
int (*pgo_asyncget) /* start async get */
|
|
__P((struct uvm_object *, vaddr_t, int));
|
|
int (*pgo_put) /* put/write page */
|
|
__P((struct uvm_object *, vm_page_t *,
|
|
int, boolean_t));
|
|
void (*pgo_cluster) /* return range of cluster */
|
|
__P((struct uvm_object *, vaddr_t, vaddr_t *,
|
|
vaddr_t *));
|
|
struct vm_page ** (*pgo_mk_pcluster) /* make "put" cluster */
|
|
__P((struct uvm_object *, struct vm_page **,
|
|
int *, struct vm_page *, int, vaddr_t,
|
|
vaddr_t));
|
|
void (*pgo_shareprot) /* share protect */
|
|
__P((vm_map_entry_t, vm_prot_t));
|
|
void (*pgo_aiodone) /* async iodone */
|
|
__P((struct uvm_aiodesc *));
|
|
boolean_t (*pgo_releasepg) /* release page */
|
|
__P((struct vm_page *, struct vm_page **));
|
|
};
|
|
|
|
/* pager flags [mostly for flush] */
|
|
|
|
#define PGO_CLEANIT 0x001 /* write dirty pages to backing store */
|
|
#define PGO_SYNCIO 0x002 /* if PGO_CLEAN: use sync I/O? */
|
|
/*
|
|
* obviously if neither PGO_INVALIDATE or PGO_FREE are set then the pages
|
|
* stay where they are.
|
|
*/
|
|
#define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */
|
|
#define PGO_FREE 0x008 /* free flushed pages */
|
|
|
|
#define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */
|
|
#define PGO_DOACTCLUST 0x020 /* flag to mk_pcluster to include active */
|
|
#define PGO_LOCKED 0x040 /* fault data structures are locked [get] */
|
|
#define PGO_PDFREECLUST 0x080 /* daemon's free cluster flag [uvm_pager_put] */
|
|
#define PGO_REALLOCSWAP 0x100 /* reallocate swap area [pager_dropcluster] */
|
|
|
|
/* page we are not interested in getting */
|
|
#define PGO_DONTCARE ((struct vm_page *) -1) /* [get only] */
|
|
|
|
/*
|
|
* handle inline options
|
|
*/
|
|
|
|
#ifdef UVM_PAGER_INLINE
|
|
#define PAGER_INLINE static __inline
|
|
#else
|
|
#define PAGER_INLINE /* nothing */
|
|
#endif /* UVM_PAGER_INLINE */
|
|
|
|
/*
|
|
* prototypes
|
|
*/
|
|
|
|
void uvm_pager_dropcluster __P((struct uvm_object *,
|
|
struct vm_page *, struct vm_page **,
|
|
int *, int, int));
|
|
void uvm_pager_init __P((void));
|
|
int uvm_pager_put __P((struct uvm_object *, struct vm_page *,
|
|
struct vm_page ***, int *, int,
|
|
vaddr_t, vaddr_t));
|
|
|
|
PAGER_INLINE struct vm_page *uvm_pageratop __P((vaddr_t));
|
|
|
|
vaddr_t uvm_pagermapin __P((struct vm_page **, int,
|
|
struct uvm_aiodesc **, int));
|
|
void uvm_pagermapout __P((vaddr_t, int));
|
|
struct vm_page **uvm_mk_pcluster __P((struct uvm_object *, struct vm_page **,
|
|
int *, struct vm_page *, int,
|
|
vaddr_t, vaddr_t));
|
|
void uvm_shareprot __P((vm_map_entry_t, vm_prot_t));
|
|
|
|
|
|
#endif /* _UVM_UVM_PAGER_H_ */
|