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dioreg.h revision 1.8 
      1 /*	$NetBSD: dioreg.h,v 1.8 2011/03/06 14:51:21 tsutsui 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)
    139