1 /*- 2 * SPDX-License-Identifier: (BSD-2-Clause-FreeBSD AND ISC) 3 * 4 * Copyright (c) 1998 Doug Rabson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 /*- 33 * Modifications for Intel architecture by Garrett A. Wollman. 34 * Copyright 1998 Massachusetts Institute of Technology 35 * 36 * Permission to use, copy, modify, and distribute this software and 37 * its documentation for any purpose and without fee is hereby 38 * granted, provided that both the above copyright notice and this 39 * permission notice appear in all copies, that both the above 40 * copyright notice and this permission notice appear in all 41 * supporting documentation, and that the name of M.I.T. not be used 42 * in advertising or publicity pertaining to distribution of the 43 * software without specific, written prior permission. M.I.T. makes 44 * no representations about the suitability of this software for any 45 * purpose. It is provided "as is" without express or implied 46 * warranty. 47 * 48 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 49 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 50 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 51 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 52 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 53 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 54 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 55 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 56 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 57 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 58 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 */ 61 62 #include <sys/param.h> 63 #include <sys/bus.h> 64 #include <sys/kernel.h> 65 #include <sys/malloc.h> 66 #include <sys/module.h> 67 #include <machine/bus.h> 68 #include <sys/rman.h> 69 70 #include <machine/resource.h> 71 72 #include <isa/isavar.h> 73 #include <isa/isa_common.h> 74 75 void 76 isa_init(device_t dev) 77 { 78 } 79 80 /* 81 * This implementation simply passes the request up to the parent 82 * bus, which in our case is the special i386 nexus, substituting any 83 * configured values if the caller defaulted. We can get away with 84 * this because there is no special mapping for ISA resources on an Intel 85 * platform. When porting this code to another architecture, it may be 86 * necessary to interpose a mapping layer here. 87 */ 88 struct resource * 89 isa_alloc_resource(device_t bus, device_t child, int type, int *rid, 90 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 91 { 92 /* 93 * Consider adding a resource definition. 94 */ 95 int passthrough = (device_get_parent(child) != bus); 96 int isdefault = RMAN_IS_DEFAULT_RANGE(start, end); 97 struct isa_device* idev = DEVTOISA(child); 98 struct resource_list *rl = &idev->id_resources; 99 struct resource_list_entry *rle; 100 101 if (!passthrough && !isdefault) { 102 rle = resource_list_find(rl, type, *rid); 103 if (!rle) { 104 if (*rid < 0) 105 return 0; 106 switch (type) { 107 case SYS_RES_IRQ: 108 if (*rid >= ISA_NIRQ) 109 return 0; 110 break; 111 case SYS_RES_DRQ: 112 if (*rid >= ISA_NDRQ) 113 return 0; 114 break; 115 case SYS_RES_MEMORY: 116 if (*rid >= ISA_NMEM) 117 return 0; 118 break; 119 case SYS_RES_IOPORT: 120 if (*rid >= ISA_NPORT) 121 return 0; 122 break; 123 default: 124 return 0; 125 } 126 resource_list_add(rl, type, *rid, start, end, count); 127 } 128 } 129 130 return resource_list_alloc(rl, bus, child, type, rid, 131 start, end, count, flags); 132 } 133 134 int 135 isa_release_resource(device_t bus, device_t child, int type, int rid, 136 struct resource *r) 137 { 138 struct isa_device* idev = DEVTOISA(child); 139 struct resource_list *rl = &idev->id_resources; 140 141 return resource_list_release(rl, bus, child, type, rid, r); 142 } 143 144 /* 145 * On this platform, isa can also attach to the legacy bus. 146 */ 147 DRIVER_MODULE(isa, legacy, isa_driver, isa_devclass, 0, 0); 148 149 /* 150 * Attach the ISA bus to the xenpv bus in order to get syscons. 151 */ 152 DRIVER_MODULE(isa, xenpv, isa_driver, isa_devclass, 0, 0); 153