1/* $NetBSD: pcmb.c,v 1.22 2021/08/07 16:18:55 thorpej Exp $ */ 2 3/*- 4 * Copyright (c) 1996, 1998 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 and Jaromir Dolecek. 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 * "Driver" for PCI-MCA Bridges. 34 */ 35 36#include <sys/cdefs.h> 37__KERNEL_RCSID(0, "$NetBSD: pcmb.c,v 1.22 2021/08/07 16:18:55 thorpej Exp $"); 38 39#include <sys/types.h> 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/device.h> 43#include <sys/bus.h> 44 45#include <dev/mca/mcavar.h> 46 47#include <dev/pci/pcivar.h> 48#include <dev/pci/pcireg.h> 49 50#include <dev/pci/pcidevs.h> 51 52#include "mca.h" 53 54int pcmbmatch(device_t, cfdata_t, void *); 55void pcmbattach(device_t, device_t, void *); 56 57CFATTACH_DECL_NEW(pcmb, 0, pcmbmatch, pcmbattach, NULL, NULL); 58 59void pcmb_callback(device_t); 60 61int 62pcmbmatch(device_t parent, cfdata_t match, void *aux) 63{ 64 struct pci_attach_args *pa = aux; 65 66 /* 67 * Match anything which claims to be PCI-MCA bridge. 68 */ 69 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE 70 && PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_MC) 71 return (1); 72 73 return (0); 74} 75 76void 77pcmbattach(device_t parent, device_t self, void *aux) 78{ 79 struct pci_attach_args *pa = aux; 80 char devinfo[256]; 81 82 aprint_naive("\n"); 83 aprint_normal("\n"); 84 85 /* 86 * Just print out a description and defer configuration 87 * until all PCI devices have been attached. 88 */ 89 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 90 aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo, 91 PCI_REVISION(pa->pa_class)); 92 93 config_defer(self, pcmb_callback); 94} 95 96void 97pcmb_callback(device_t self) 98{ 99 struct mcabus_attach_args ma; 100 101 /* 102 * Attach MCA bus behind this bridge. 103 */ 104 ma.mba_iot = x86_bus_space_io; 105 ma.mba_memt = x86_bus_space_mem; 106#if NMCA > 0 107 ma.mba_dmat = &mca_bus_dma_tag; 108#endif 109 ma.mba_mc = NULL; 110 ma.mba_bus = 0; 111 config_found(self, &ma, mcabusprint, CFARGS_NONE); 112} 113