sys/arm64/include/vm.h

   1 /*-
   2  * Copyright (c) 2009 Alan L. Cox <alc@cs.rice.edu>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #ifndef _MACHINE_VM_H_
  28 #define _MACHINE_VM_H_
  29
  30 /* Memory attribute configuration. */
  31 #define VM_MEMATTR_DEVICE_nGnRnE        0
  32 #define VM_MEMATTR_UNCACHEABLE          1
  33 #define VM_MEMATTR_WRITE_BACK           2
  34 #define VM_MEMATTR_WRITE_THROUGH        3
  35 #define VM_MEMATTR_DEVICE_nGnRE         4
  36
  37 #define VM_MEMATTR_DEVICE               VM_MEMATTR_DEVICE_nGnRE
  38 #define VM_MEMATTR_DEVICE_NP            VM_MEMATTR_DEVICE_nGnRnE
  39
  40 #ifdef _KERNEL
  41 /* If defined vmstat will try to use both of these in a switch statement */
  42 #define VM_MEMATTR_WRITE_COMBINING      VM_MEMATTR_WRITE_THROUGH
  43 #endif
  44
  45 #define VM_MEMATTR_DEFAULT      VM_MEMATTR_WRITE_BACK
  46
  47 #endif /* !_MACHINE_VM_H_ */