1 /* $NetBSD: bonito_mainbus.c,v 1.6 2022/03/03 06:27:21 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 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 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: bonito_mainbus.c,v 1.6 2022/03/03 06:27:21 riastradh Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/conf.h> 38 #include <sys/reboot.h> 39 #include <sys/device.h> 40 41 #include <sys/bus.h> 42 43 #include <mips/cpuregs.h> 44 #include <mips/bonito/bonitoreg.h> 45 46 #include <evbmips/loongson/autoconf.h> 47 #include <evbmips/loongson/loongson_bus_defs.h> 48 #include <dev/pci/pcivar.h> 49 50 static int bonito_mainbus_match(device_t, cfdata_t, void *); 51 static void bonito_mainbus_attach(device_t, device_t, void *); 52 53 CFATTACH_DECL_NEW(bonito_mainbus, 0, 54 bonito_mainbus_match, bonito_mainbus_attach, NULL, NULL); 55 56 extern struct cfdriver bonito_cd; 57 58 int 59 bonito_mainbus_match(device_t parent, cfdata_t cf, void *aux) 60 { 61 struct mainbus_attach_args * const maa = aux; 62 63 if (strcmp(maa->maa_name, bonito_cd.cd_name) == 0) 64 return (1); 65 66 return (0); 67 } 68 69 void 70 bonito_mainbus_attach(device_t parent, device_t self, void *aux) 71 { 72 struct pcibus_attach_args pba; 73 pcireg_t rev; 74 bool compatible; 75 76 device_set_private(self, __UNCONST(&sys_platform->bonito_config)); 77 78 /* 79 * Loongson 2F processors do not use a real Bonito64 chip but 80 * their own derivative, which is no longer 100% compatible. 81 * We need to make sure we never try to access an unimplemented 82 * register... 83 */ 84 if (loongson_ver >= 0x2f) 85 compatible = false; 86 else 87 compatible = true; 88 89 /* 90 * There is only one PCI controller on a Loongson chip. 91 */ 92 93 rev = PCI_REVISION(REGVAL(BONITO_PCICLASS)); 94 if (compatible) { 95 aprint_normal(": BONITO Memory and PCI controller," 96 " %s rev. %d.%d\n", BONITO_REV_FPGA(rev) ? "FPGA" : "ASIC", 97 BONITO_REV_MAJOR(rev), BONITO_REV_MINOR(rev)); 98 } else { 99 aprint_normal(": Memory and PCI-X controller, rev. %d\n", 100 PCI_REVISION(rev)); 101 } 102 103 /* 104 * Attach PCI bus. 105 */ 106 107 pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY; 108 pba.pba_bus = 0; 109 pba.pba_bridgetag = NULL; 110 111 pba.pba_iot = &bonito_iot; 112 pba.pba_memt = &bonito_memt; 113 pba.pba_dmat = &bonito_dmat; 114 pba.pba_dmat64 = NULL; 115 pba.pba_pc = &bonito_pc; 116 117 config_found(self, &pba, pcibusprint, CFARGS_NONE); 118 } 119