sys/arch/x86/include/pte.h

   1 /*      $NetBSD: pte.h,v 1.1 2010/07/06 20:50:35 cegger Exp $   */
   2
   3 /*
   4  * Copyright (c) 2010 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Christoph Egger.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _X86_PTE_H
  33 #define _X86_PTE_H
  34
  35 /* Cacheability bits when we are using PAT */
  36 #define PGC_WB          0               /* The default */
  37 #define PGC_WC          PG_WT           /* WT and CD is WC */
  38 #define PGC_UCMINUS     PG_N            /* UC but mtrr can override */
  39 #define PGC_UC          (PG_WT | PG_N)  /* hard UC */
  40
  41 /*
  42  * page protection exception bits
  43  */
  44
  45 #define PGEX_P          0x01    /* protection violation (vs. no mapping) */
  46 #define PGEX_W          0x02    /* exception during a write cycle */
  47 #define PGEX_U          0x04    /* exception while in user mode (upl) */
  48 #define PGEX_X          0x10    /* exception during instruction fetch */
  49
  50 #endif /* _X86_PTE_H */