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