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/* $OpenBSD: dioreg.h,v 1.5 2008/06/26 05:42:10 ray Exp $ */
/* $NetBSD: dioreg.h,v 1.3 1997/01/30 09:18:40 thorpej Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* Portions of this file are derived from software contributed to Berkeley
* by the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Register definitions for the DIO and DIO-II bus.
*/
/*
* DIO/DIO-II device registers, offsets from base of device. All
* registers are 8-bit.
*/
#define DIO_IDOFF 0x01 /* primary device id */
#define DIO_IPLOFF 0x03 /* interrupt level */
#define DIO_SECIDOFF 0x15 /* secondary device id */
#define DIOII_SIZEOFF 0x101 /* device size */
/*
* System physical addresses of some `special' DIO devices.
*/
#define DIO_IHPIBADDR 0x478000 /* internal HP-IB; select code 7 */
/*
* DIO ranges from select codes 0-63 at physical addresses given by:
* 0x600000 + (sc - 32) * 0x10000
* DIO cards are addressed in the range 0-31 [0x600000-0x800000) for
* their control space and the remaining areas, [0x200000-0x400000) and
* [0x800000-0x1000000), are for additional space required by a card;
* e.g. a display framebuffer.
*
* DIO-II ranges from select codes 132-255 at physical addresses given by:
* 0x1000000 + (sc - 132) * 0x400000
* The address range of DIO-II space is thus [0x1000000-0x20000000).
*
* DIO/DIO-II space is too large to map in its entirety, instead devices
* are mapped into kernel virtual address space allocated from a range
* of EIOMAPSIZE pages (vmparam.h) starting at ``extiobase''.
*/
#define DIO_BASE 0x600000 /* start of DIO space */
#define DIO_END 0x1000000 /* end of DIO space */
#define DIO_DEVSIZE 0x10000 /* size of a DIO device */
#define DIOII_BASE 0x01000000 /* start of DIO-II space */
#define DIOII_END 0x20000000 /* end of DIO-II space */
#define DIOII_DEVSIZE 0x00400000 /* size of a DIO-II device */
/*
* Find the highest select code for a given machine; HP320 doesn't
* have DIO-II.
*/
#if defined(HP320)
#define DIO_SCMAX(machineid) ((machineid) == HP_320 ? 32 : 256)
#else
#define DIO_SCMAX(machineid) 256
#endif
/*
* Base of DIO-II select codes.
*/
#define DIOII_SCBASE 132
/*
* Macro that returns true if a select code lies within
* the select code `hole'.
*/
#define DIO_INHOLE(scode) ((scode) >= 32 && (scode) < DIOII_SCBASE)
/*
* Macros to determine if device is DIO or DIO-II.
*/
#define DIO_ISDIO(scode) ((scode) >= 0 && (scode) < 32)
#define DIO_ISDIOII(scode) ((scode) >= DIOII_SCBASE && (scode) < 256)
/*
* Macro to determine if device is a framebuffer, given the
* primary id of the device. We key off this to determine if
* we should look at secondary id and ignore interrupt level.
*/
#define DIO_ISFRAMEBUFFER(id) \
((id) == DIO_DEVICE_ID_FRAMEBUFFER)
/*
* Macro to extract primary and decondary device ids, given
* the base address of the device.
*/
#define DIO_ID(base) \
(*((u_int8_t *)((u_long)(base) + DIO_IDOFF)))
#define DIO_SECID(base) \
(*((u_int8_t *)((u_long)(base) + DIO_SECIDOFF)))
/*
* Macro to extract the interrupt level, given the
* base address of the device.
*/
#define DIO_IPL(base) \
((((*((u_int8_t *)((u_long)(base) + DIO_IPLOFF))) >> 4) & 0x03) + 3)
/*
* Macro to compute the size of a DIO-II device's address
* space, given the base address of the device.
*/
#define DIOII_SIZE(base) \
((int)((*((u_int8_t *)((u_long)(base) + DIOII_SIZEOFF)) + 1) \
* 0x100000))
/*
* Given a select code and device base address, compute
* the size of the DIO/DIO-II device.
*/
#define DIO_SIZE(scode, base) \
(DIO_ISDIOII((scode)) ? DIOII_SIZE((base)) : DIO_DEVSIZE)
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