sys/arch/sh3/include/pte.h

   1 /*      $NetBSD: pte.h,v 1.11 2006/03/04 01:55:03 uwe Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by UCHIYAMA Yasushi.
   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 _SH3_PTE_H_
  33 #define _SH3_PTE_H_
  34
  35 /*
  36  * NetBSD/sh3 PTE format.
  37  *
  38  * [Hardware bit]
  39  * SH3
  40  *        PPN   V   PR  SZ C  D  SH
  41  *      [28:10][8][6:5][4][3][2][1]
  42  *
  43  * SH4
  44  *              V  SZ  PR  SZ C  D  SH WT
  45  *      [28:10][8][7][6:5][4][3][2][1][0]
  46  *
  47  * [Software bit]
  48  *   [31]   - PMAP_WIRED bit (not hardware wired entry)
  49  *   [11:9] - SH4 PCMCIA Assistant bit. (space attribute bit only)
  50  */
  51
  52 /*
  53  * Hardware bits
  54  */
  55 #define PG_PPN                  0x1ffff000      /* Physical page number mask */
  56 #define PG_V                    0x00000100      /* Valid */
  57 #define PG_PR_MASK              0x00000060      /* Page protection mask */
  58 #define PG_PR_URW               0x00000060      /* kernel/user read/write */
  59 #define PG_PR_URO               0x00000040      /* kernel/user read only */
  60 #define PG_PR_KRW               0x00000020      /* kernel read/write */
  61 #define PG_PR_KRO               0x00000000      /* kernel read only */
  62 #define PG_4K                   0x00000010      /* page size 4KB */
  63 #define PG_C                    0x00000008      /* Cacheable */
  64 #define PG_D                    0x00000004      /* Dirty */
  65 #define PG_SH                   0x00000002      /* Share status */
  66 #define PG_WT                   0x00000001      /* Write-through (SH4 only) */
  67
  68 #define PG_HW_BITS              0x1ffff17e      /* [28:12][8][6:1] */
  69
  70 /*
  71  * Software bits
  72  */
  73 #define _PG_WIRED               0x80000000
  74
  75 /* SH4 PCMCIA MMU support bits */
  76 /* PTEA SA (Space Attribute bit) */
  77 #define _PG_PCMCIA              0x00000e00      /* [11:9] */
  78 #define _PG_PCMCIA_SHIFT        9
  79 #define _PG_PCMCIA_NONE         0x00000000      /* Non PCMCIA space */
  80 #define _PG_PCMCIA_IO           0x00000200      /* IOIS16 signal */
  81 #define _PG_PCMCIA_IO8          0x00000400      /* 8 bit I/O  */
  82 #define _PG_PCMCIA_IO16         0x00000600      /* 16 bit I/O  */
  83 #define _PG_PCMCIA_MEM8         0x00000800      /* 8 bit common memory */
  84 #define _PG_PCMCIA_MEM16        0x00000a00      /* 16 bit common memory */
  85 #define _PG_PCMCIA_ATTR8        0x00000c00      /* 8 bit attribute */
  86 #define _PG_PCMCIA_ATTR16       0x00000e00      /* 16 bit attribute */
  87
  88 #ifndef _LOCORE
  89 typedef uint32_t pt_entry_t;
  90 #endif /* _LOCORE */
  91 #endif /* !_SH3_PTE_H_ */