sys/uvm/uvm_loan.h

   1 /*      $NetBSD: uvm_loan.h,v 1.17 2011/02/02 15:13:34 chuck Exp $      */
   2
   3 /*
   4  * Copyright (c) 1997 Charles D. Cranor and Washington University.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  *
  27  * from: Id: uvm_loan.h,v 1.1.4.1 1997/12/08 16:07:14 chuck Exp
  28  */
  29
  30 #ifndef _UVM_UVM_LOAN_H_
  31 #define _UVM_UVM_LOAN_H_
  32
  33 #ifdef _KERNEL
  34
  35 /*
  36  * flags for uvm_loan()
  37  */
  38
  39 #define UVM_LOAN_TOANON         0x1             /* loan to anon */
  40 #define UVM_LOAN_TOPAGE         0x2             /* loan to page */
  41
  42 /*
  43  * loan prototypes
  44  */
  45
  46 void uvm_loan_init(void);
  47 int uvm_loan(struct vm_map *, vaddr_t, vsize_t, void *, int);
  48 void uvm_unloan(void *, int, int);
  49 int uvm_loanuobjpages(struct uvm_object *, voff_t, int,
  50     struct vm_page **);
  51 struct vm_page *uvm_loanbreak(struct vm_page *);
  52 int uvm_loanbreak_anon(struct vm_anon *, struct uvm_object *);
  53
  54 #endif /* _KERNEL */
  55
  56 #endif /* _UVM_UVM_LOAN_H_ */