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device and which also applies to the children. This is very usefull for drivers for the various subordinate busses so they don't need to fiddle with the OFW node of their parent themselves. As SBus busses hang of the nexus and we don't use the ofw_bus interface for nexus devices, yet, this would also require special knowledge about this in the drivers for the SBus children which these shouldn't need to have. This includes switching to use an unshifted IGN in the sc_ign member of the sbus(4) softc internally. - For SBus child devices where there are variants that are actually split split into two SBus devices (as opposed to the first half of the device being a SBus device and the second half hanging off of the first one) like 'auxio' and 'SUNW,fdtwo' or 'dma' and 'esp' probe the SBus device which is a prerequisite to the driver attaching to the second one with a lower order. This saves us from dealing with different probe orders in the respective device drivers which generally is more hackish. - Remove a stale comment about the 'specials' array above the attaching of the child devices. This is a remnant of the NetBSD/sparc origin of this code. There the 'specials' array is also used to probe certain devices which are prerequisites to others first. Why NetBSD soley relies on the devices having the expected order in the OFW tree on sparc64 isn't clear to me, as far as I can tell OFW doesn't guaranteed such things.
125 lines
4.9 KiB
C
125 lines
4.9 KiB
C
/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)sbusvar.h 8.1 (Berkeley) 6/11/93
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* from: NetBSD: sbusvar.h,v 1.7 1999/06/05 05:30:43 mrg Exp
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*
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* $FreeBSD$
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*/
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#ifndef _SPARC64_SBUS_SBUSVAR_H_
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#define _SPARC64_SBUS_SBUSVAR_H_
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/*
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* Macros for probe order
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*/
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#define SBUS_ORDER_FIRST 10
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#define SBUS_ORDER_NORMAL 20
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/*
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* PROM-reported DMA burst sizes for the SBus
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*/
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#define SBUS_BURST_1 0x1
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#define SBUS_BURST_2 0x2
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#define SBUS_BURST_4 0x4
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#define SBUS_BURST_8 0x8
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#define SBUS_BURST_16 0x10
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#define SBUS_BURST_32 0x20
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#define SBUS_BURST_64 0x40
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/* Used if no burst sizes are specified for the bus. */
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#define SBUS_BURST_DEF \
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(SBUS_BURST_1 | SBUS_BURST_2 | SBUS_BURST_4 | SBUS_BURST_8 | \
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SBUS_BURST_16)
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enum sbus_device_ivars {
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SBUS_IVAR_BURSTSZ,
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SBUS_IVAR_CLOCKFREQ,
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SBUS_IVAR_IGN,
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SBUS_IVAR_SLOT,
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};
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/*
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* Simplified accessors for sbus devices
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*/
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#define SBUS_ACCESSOR(var, ivar, type) \
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__BUS_ACCESSOR(sbus, var, SBUS, ivar, type)
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SBUS_ACCESSOR(burstsz, BURSTSZ, int)
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SBUS_ACCESSOR(clockfreq, CLOCKFREQ, int)
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SBUS_ACCESSOR(ign, IGN, int)
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SBUS_ACCESSOR(slot, SLOT, int)
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#undef SBUS_ACCESSOR
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#endif /* _SPARC64_SBUS_SBUSVAR_H_ */
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