NetBSD/sys/uvm/uvm_loan.h

57 lines
2.0 KiB
C

/* $NetBSD: uvm_loan.h,v 1.17 2011/02/02 15:13:34 chuck 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_loan.h,v 1.1.4.1 1997/12/08 16:07:14 chuck Exp
*/
#ifndef _UVM_UVM_LOAN_H_
#define _UVM_UVM_LOAN_H_
#ifdef _KERNEL
/*
* flags for uvm_loan()
*/
#define UVM_LOAN_TOANON 0x1 /* loan to anon */
#define UVM_LOAN_TOPAGE 0x2 /* loan to page */
/*
* loan prototypes
*/
void uvm_loan_init(void);
int uvm_loan(struct vm_map *, vaddr_t, vsize_t, void *, int);
void uvm_unloan(void *, int, int);
int uvm_loanuobjpages(struct uvm_object *, voff_t, int,
struct vm_page **);
struct vm_page *uvm_loanbreak(struct vm_page *);
int uvm_loanbreak_anon(struct vm_anon *, struct uvm_object *);
#endif /* _KERNEL */
#endif /* _UVM_UVM_LOAN_H_ */