83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
/* $NetBSD: alpha_pci_conf.c,v 1.1 2000/02/26 18:59:36 thorpej Exp $ */
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/*-
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* Copyright (c) 2000 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 Jason R. Thorpe.
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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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* Support for accessing PCI configuration space. This is currently
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* used to provide such support for XFree86. In a perfect world, this
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* would go away in favor of a real bus space mapping framework.
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*/
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#include <sys/param.h>
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#include <machine/sysarch.h>
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u_int32_t
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alpha_pci_conf_read(bus, device, func, reg)
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u_int bus, device, func, reg;
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{
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struct alpha_pci_conf_readwrite_args args;
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args.write = 0;
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args.bus = bus;
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args.device = device;
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args.function = func;
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args.reg = reg;
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if (sysarch(ALPHA_PCI_CONF_READWRITE, &args) == -1)
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return (0xffffffffU);
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return (args.val);
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}
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void
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alpha_pci_conf_write(bus, device, func, reg, val)
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u_int bus, device, func, reg;
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u_int32_t val;
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{
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struct alpha_pci_conf_readwrite_args args;
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args.write = 1;
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args.bus = bus;
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args.device = device;
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args.function = func;
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args.reg = reg;
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args.val = val;
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(void) sysarch(ALPHA_PCI_CONF_READWRITE, &args);
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}
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