1 /* $NetBSD: alpha_pci_conf.c,v 1.3 2008/04/28 20:22:55 martin Exp $ */
2
3 /*-
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Support for accessing PCI configuration space. This is currently
34 * used to provide such support for XFree86. In a perfect world, this
35 * would go away in favor of a real bus space mapping framework.
36 */
37
38 #include <sys/param.h>
39
40 #include <machine/sysarch.h>
41
42 uint32_t
alpha_pci_conf_read(u_int bus,u_int device,u_int func,u_int reg)43 alpha_pci_conf_read(u_int bus, u_int device, u_int func, u_int reg)
44 {
45 struct alpha_pci_conf_readwrite_args args;
46
47 args.write = 0;
48 args.bus = bus;
49 args.device = device;
50 args.function = func;
51 args.reg = reg;
52
53 if (sysarch(ALPHA_PCI_CONF_READWRITE, &args) == -1)
54 return (0xffffffffU);
55
56 return (args.val);
57 }
58
59 void
alpha_pci_conf_write(u_int bus,u_int device,u_int func,u_int reg,uint32_t val)60 alpha_pci_conf_write(u_int bus, u_int device, u_int func, u_int reg,
61 uint32_t val)
62 {
63 struct alpha_pci_conf_readwrite_args args;
64
65 args.write = 1;
66 args.bus = bus;
67 args.device = device;
68 args.function = func;
69 args.reg = reg;
70 args.val = val;
71
72 (void) sysarch(ALPHA_PCI_CONF_READWRITE, &args);
73 }
74