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/* $FreeBSD$ */
/* $OpenBSD: ebusreg.h,v 1.4 2001/10/01 18:08:04 jason Exp $ */
/* $NetBSD: ebusreg.h,v 1.8 2008/05/29 14:51:27 mrg Exp $ */
/*-
* Copyright (c) 1999 Matthew R. Green
* All rights reserved.
*
* 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 AUTHOR ``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 AUTHOR 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.
*
*/
/*
* UltraSPARC `ebus'
*
* The `ebus' bus is designed to plug traditional PC-ISA devices into
* an SPARC system with as few costs as possible, without sacrificing
* to performance. Typically, it is implemented in the PCIO IC from
* SME, which also implements a `hme-compatible' PCI network device
* (`network'). The ebus has 4 DMA channels, similar to the DMA seen
* in the ESP SCSI DMA.
*
* Typical UltraSPARC systems have a NatSemi SuperIO IC to provide
* serial ports for the keyboard and mouse (`se'), floppy disk
* controller (`fdthree'), parallel port controller (`bpp') connected
* to the ebus, and a PCI-IDE controller (connected directly to the
* PCI bus, of course), as well as a Siemens Nixdorf SAB82532 dual
* channel serial controller (`su' providing ttya and ttyb), an MK48T59
* EEPROM/clock controller (also where the idprom, including the
* ethernet address, is located), the audio system (`SUNW,CS4231', same
* as other UltraSPARC and some SPARC systems), and other various
* internal devices found on traditional SPARC systems such as the
* `power', `flashprom', etc., devices.
*
* The ebus uses an interrupt mapping scheme similar to PCI, though
* the actual structures are different.
*/
/* EBUS dma registers */
#define EBDMA_DCSR 0x0 /* control/status */
#define EBDMA_DADDR 0x4 /* DMA address */
#define EBDMA_DCNT 0x8 /* DMA count */
/* EBUS DMA control/status (EBDMA_DCSR) */
#define EBDCSR_INT 0x00000001 /* interrupt pending */
#define EBDCSR_ERR 0x00000002 /* error pending */
#define EBDCSR_DRAIN 0x00000004 /* drain */
#define EBDCSR_INTEN 0x00000010 /* interrupt enable */
#define EBDCSR_RESET 0x00000080 /* reset */
#define EBDCSR_WRITE 0x00000100 /* write */
#define EBDCSR_DMAEN 0x00000200 /* dma enable */
#define EBDCSR_CYC 0x00000400 /* cyc pending */
#define EBDCSR_DIAGRD 0x00000800 /* diagnostic read done */
#define EBDCSR_DIAGWR 0x00001000 /* diagnostic write done */
#define EBDCSR_CNTEN 0x00002000 /* count enable */
#define EBDCSR_TC 0x00004000 /* terminal count */
#define EBDCSR_CSRDRNDIS 0x00010000 /* disable csr drain */
#define EBDCSR_BURSTMASK 0x000c0000 /* burst size mask */
#define EBDCSR_BURST_1 0x00080000 /* burst 1 */
#define EBDCSR_BURST_4 0x00000000 /* burst 4 */
#define EBDCSR_BURST_8 0x00040000 /* burst 8 */
#define EBDCSR_BURST_16 0x000c0000 /* burst 16 */
#define EBDCSR_DIAGEN 0x00100000 /* enable diagnostics */
#define EBDCSR_ERRDIS 0x00400000 /* disable error pending */
#define EBDCSR_TCIDIS 0x00800000 /* disable TCI */
#define EBDCSR_NEXTEN 0x01000000 /* enable next */
#define EBDCSR_DMAON 0x02000000 /* dma on */
#define EBDCSR_A_LOADED 0x04000000 /* address loaded */
#define EBDCSR_NA_LOADED 0x08000000 /* next address loaded */
#define EBDCSR_DEVMASK 0xf0000000 /* device id mask */
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