sys/arch/hp300/dev/dioreg.h

   1 /*      $NetBSD: dioreg.h,v 1.6 2005/12/11 12:17:13 christos Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jason R. Thorpe.
   9  *
  10  * Portions of this file are derived from software contributed to Berkeley
  11  * by the Systems Programming Group of the University of Utah Computer
  12  * Science Department.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions
  16  * are met:
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in the
  21  *    documentation and/or other materials provided with the distribution.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /*
  37  * Register definitions for the DIO and DIO-II bus.
  38  */
  39
  40 /*
  41  * DIO/DIO-II device registers, offsets from base of device.  All
  42  * registers are 8-bit.
  43  */
  44 #define DIO_IDOFF               0x01    /* primary device id */
  45 #define DIO_IPLOFF              0x03    /* interrupt level */
  46 #define DIO_SECIDOFF            0x15    /* secondary device id */
  47 #define DIOII_SIZEOFF           0x101   /* device size */
  48
  49 /*
  50  * System physical addresses of some `special' DIO devices.
  51  */
  52 #define DIO_IHPIBADDR           0x478000 /* internal HP-IB; select code 7 */
  53
  54 /*
  55  * DIO ranges from select codes 0-63 at physical addresses given by:
  56  *      0x600000 + (sc - 32) * 0x10000
  57  * DIO cards are addressed in the range 0-31 [0x600000-0x800000) for
  58  * their control space and the remaining areas, [0x200000-0x400000) and
  59  * [0x800000-0x1000000), are for additional space required by a card;
  60  * e.g. a display framebuffer.
  61  *
  62  * DIO-II ranges from select codes 132-255 at physical addresses given by:
  63  *      0x1000000 + (sc - 132) * 0x400000
  64  * The address range of DIO-II space is thus [0x1000000-0x20000000).
  65  *
  66  * DIO/DIO-II space is too large to map in its entirety, instead devices
  67  * are mapped into kernel virtual address space allocated from a range
  68  * of EIOMAPSIZE pages (vmparam.h) starting at ``extiobase''.
  69  */
  70 #define DIO_BASE                0x600000        /* start of DIO space */
  71 #define DIO_END                 0x1000000       /* end of DIO space */
  72 #define DIO_DEVSIZE             0x10000         /* size of a DIO device */
  73
  74 #define DIOII_BASE              0x01000000      /* start of DIO-II space */
  75 #define DIOII_END               0x20000000      /* end of DIO-II space */
  76 #define DIOII_DEVSIZE           0x00400000      /* size of a DIO-II device */
  77
  78 /*
  79  * Find the highest select code for a given machine; HP320 doesn't
  80  * have DIO-II.
  81  */
  82 #define DIO_SCMAX(machineid)    ((machineid) == HP_320 ? 32 : 256)
  83
  84 /*
  85  * Base of DIO-II select codes.
  86  */
  87 #define DIOII_SCBASE            132
  88
  89 /*
  90  * Macro that returns true if a select code lies within
  91  * the select code `hole'.
  92  */
  93 #define DIO_INHOLE(scode)       ((scode) >= 32 && (scode) < 132)
  94
  95 /*
  96  * Macros to determine if device is DIO or DIO-II.
  97  */
  98 #define DIO_ISDIO(scode)        ((scode) >= 0 && (scode) < 32)
  99 #define DIO_ISDIOII(scode)      ((scode) >= DIOII_SCBASE && (scode) < 256)
 100
 101 /*
 102  * Macro to determine if device is a framebuffer, given the
 103  * primary id of the device.  We key off this to determine if
 104  * we should look at secondary id and ignore interrupt level.
 105  */
 106 #define DIO_ISFRAMEBUFFER(id)           \
 107         ((id) == DIO_DEVICE_ID_FRAMEBUFFER)
 108
 109 /*
 110  * Macro to extract primary and decondary device ids, given
 111  * the base address of the device.
 112  */
 113 #define DIO_ID(base)                    \
 114         (*((uint8_t *)((u_long)(base) + DIO_IDOFF)))
 115 #define DIO_SECID(base)                 \
 116         (*((uint8_t *)((u_long)(base) + DIO_SECIDOFF)))
 117
 118 /*
 119  * Macro to extract the interrupt level, given the
 120  * base address of the device.
 121  */
 122 #define DIO_IPL(base)                   \
 123         ((((*((uint8_t *)((u_long)(base) + DIO_IPLOFF))) >> 4) & 0x03) + 3)
 124
 125 /*
 126  * Macro to compute the size of a DIO-II device's address
 127  * space, given the base address of the device.
 128  */
 129 #define DIOII_SIZE(base)                \
 130         ((int)((*((uint8_t *)((u_long)(base) + DIOII_SIZEOFF)) + 1)     \
 131             * 0x100000))
 132
 133 /*
 134  * Given a select code and device base address, compute
 135  * the size of the DIO/DIO-II device.
 136  */
 137 #define DIO_SIZE(scode, base)           \
 138         (DIO_ISDIOII((scode)) ? DIOII_SIZE((base)) : DIO_DEVSIZE)