sys/uvm/uvm_loan.h

   1 /*      $NetBSD: uvm_loan.h,v 1.11.2.3 2004/09/21 13:39:27 skrll Exp $  */
   2
   3 /*
   4  *
   5  * Copyright (c) 1997 Charles D. Cranor and Washington University.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by Charles D. Cranor and
  19  *      Washington University.
  20  * 4. The name of the author may not be used to endorse or promote products
  21  *    derived from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  *
  34  * from: Id: uvm_loan.h,v 1.1.4.1 1997/12/08 16:07:14 chuck Exp
  35  */
  36
  37 #ifndef _UVM_UVM_LOAN_H_
  38 #define _UVM_UVM_LOAN_H_
  39
  40 #ifdef _KERNEL
  41
  42 /*
  43  * flags for uvm_loan()
  44  */
  45
  46 #define UVM_LOAN_TOANON         0x1             /* loan to anon */
  47 #define UVM_LOAN_TOPAGE         0x2             /* loan to page */
  48
  49 /*
  50  * loan prototypes
  51  */
  52
  53 void uvm_loan_init(void);
  54 int uvm_loan(struct vm_map *, vaddr_t, vsize_t, void *, int);
  55 void uvm_unloan(void *, int, int);
  56 int uvm_loanuobjpages(struct uvm_object *, voff_t, int,
  57     struct vm_page **);
  58 struct vm_page *uvm_loanbreak(struct vm_page *);
  59
  60 #endif /* _KERNEL */
  61
  62 #endif /* _UVM_UVM_LOAN_H_ */