dioreg.h revision 1.2
1 /* $NetBSD: dioreg.h,v 1.2 1997/01/12 21:27:27 thorpej 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 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the NetBSD 25 * Foundation, Inc. and its contributors. 26 * 4. Neither the name of The NetBSD Foundation nor the names of its 27 * contributors may be used to endorse or promote products derived 28 * from this software without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 31 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 32 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 33 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE 34 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 38 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 40 * POSSIBILITY OF SUCH DAMAGE. 41 */ 42 43 /* 44 * Register definitions for the DIO and DIO-II bus. 45 */ 46 47 /* 48 * DIO/DIO-II device registers, offsets from base of device. All 49 * registers are 8-bit. 50 */ 51 #define DIO_IDOFF 0x01 /* primary device id */ 52 #define DIO_IPLOFF 0x03 /* interrupt level */ 53 #define DIO_SECIDOFF 0x15 /* secondary device id */ 54 #define DIOII_SIZEOFF 0x101 /* device size */ 55 56 /* 57 * System physical addresses of some `special' DIO devices. 58 */ 59 #define DIO_IHPIBADDR 0x478000 /* internal HP-IB; select code 7 */ 60 61 /* 62 * DIO ranges from select codes 0-63 at physical addresses given by: 63 * 0x600000 + (sc - 32) * 0x10000 64 * DIO cards are addressed in the range 0-31 [0x600000-0x800000) for 65 * their control space and the remaining areas, [0x200000-0x400000) and 66 * [0x800000-0x1000000), are for additional space required by a card; 67 * e.g. a display framebuffer. 68 * 69 * DIO-II ranges from select codes 132-255 at physical addresses given by: 70 * 0x1000000 + (sc - 132) * 0x400000 71 * The address range of DIO-II space is thus [0x1000000-0x20000000). 72 * 73 * DIO/DIO-II space is too large to map in its entirety, instead devices 74 * are mapped into kernel virtual address space allocated from a range 75 * of EIOMAPSIZE pages (vmparam.h) starting at ``extiobase''. 76 */ 77 #define DIO_BASE 0x600000 /* start of DIO space */ 78 #define DIO_END 0x1000000 /* end of DIO space */ 79 #define DIO_DEVSIZE 0x10000 /* size of a DIO device */ 80 81 #define DIOII_BASE 0x01000000 /* start of DIO-II space */ 82 #define DIOII_END 0x20000000 /* end of DIO-II space */ 83 #define DIOII_DEVSIZE 0x00400000 /* size of a DIO-II device */ 84 85 /* 86 * Find the highest select code for a given machine; HP320 doesn't 87 * have DIO-II. 88 */ 89 #define DIO_SCMAX(machineid) ((machineid) == HP_320 ? 32 : 256) 90 91 /* 92 * Base of DIO-II select codes. 93 */ 94 #define DIOII_SCBASE 132 95 96 /* 97 * Macro that returns true if a select code lies within 98 * the select code `hole'. 99 */ 100 #define DIO_INHOLE(scode) ((scode) >= 32 && (scode) < 132) 101 102 /* 103 * Macros to determine if device is DIO or DIO-II. 104 */ 105 #define DIO_ISDIO(scode) ((scode) >= 0 && (scode) < 32) 106 #define DIO_ISDIOII(scode) ((scode) >= DIOII_SCBASE && (scode) < 256) 107 108 /* 109 * Macro to determine if device is a framebuffer, given the 110 * primary id of the device. We key off this to determine if 111 * we should look at secondary id and ignore interrupt level. 112 */ 113 #define DIO_ISFRAMEBUFFER(id) \ 114 ((id) == DIO_DEVICE_ID_FRAMEBUFFER) 115 116 /* 117 * Macro to extract primary and decondary device ids, given 118 * the base address of the device. 119 */ 120 #define DIO_ID(base) \ 121 (*((u_int8_t *)((u_long)(base) + DIO_IDOFF))) 122 #define DIO_SECID(base) \ 123 (*((u_int8_t *)((u_long)(base) + DIO_SECIDOFF))) 124 125 /* 126 * Macro to extract the interrupt level, given the 127 * base address of the device. 128 */ 129 #define DIO_IPL(base) \ 130 ((((*((u_int8_t *)((u_long)(base) + DIO_IPLOFF))) >> 4) & 0x03) + 3) 131 132 /* 133 * Macro to compute the size of a DIO-II device's address 134 * space, given the base address of the device. 135 */ 136 #define DIOII_SIZE(base) \ 137 ((int)((*((u_int8_t *)((u_long)(base) + DIOII_SIZEOFF)) + 1) \ 138 * 0x100000)) 139 140 /* 141 * Given a select code and device base address, compute 142 * the size of the DIO/DIO-II device. 143 */ 144 #define DIO_SIZE(scode, base) \ 145 (DIO_ISDIOII((scode)) ? DIOII_SIZE((base)) : DIO_DEVSIZE) 146
Indexes created Mon Sep 29 21:09:56 GMT 2025