NetBSD/lib/libarch/alpha/alpha_pci_conf.c

81 lines
2.8 KiB
C

/* $NetBSD: alpha_pci_conf.c,v 1.2 2001/07/17 17:46:42 thorpej Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 FOUNDATION 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.
*/
/*
* Support for accessing PCI configuration space. This is currently
* used to provide such support for XFree86. In a perfect world, this
* would go away in favor of a real bus space mapping framework.
*/
#include <sys/param.h>
#include <machine/sysarch.h>
uint32_t
alpha_pci_conf_read(u_int bus, u_int device, u_int func, u_int reg)
{
struct alpha_pci_conf_readwrite_args args;
args.write = 0;
args.bus = bus;
args.device = device;
args.function = func;
args.reg = reg;
if (sysarch(ALPHA_PCI_CONF_READWRITE, &args) == -1)
return (0xffffffffU);
return (args.val);
}
void
alpha_pci_conf_write(u_int bus, u_int device, u_int func, u_int reg,
uint32_t val)
{
struct alpha_pci_conf_readwrite_args args;
args.write = 1;
args.bus = bus;
args.device = device;
args.function = func;
args.reg = reg;
args.val = val;
(void) sysarch(ALPHA_PCI_CONF_READWRITE, &args);
}