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 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 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