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 #ifdef PC98 68 #include <sys/systm.h> 69 #endif 70 71 #include <machine/resource.h> 72 73 #include <isa/isavar.h> 74 #include <isa/isa_common.h> 75 76 void 77 isa_init(device_t dev) 78 { 79 } 80 81 /* 82 * This implementation simply passes the request up to the parent 83 * bus, which in our case is the special i386 nexus, substituting any 84 * configured values if the caller defaulted. We can get away with 85 * this because there is no special mapping for ISA resources on an Intel 86 * platform. When porting this code to another architecture, it may be 87 * necessary to interpose a mapping layer here. 88 */ 89 struct resource * 90 isa_alloc_resource(device_t bus, device_t child, int type, int *rid, 91 u_long start, u_long end, u_long count, u_int flags) 92 { 93 /* 94 * Consider adding a resource definition. 95 */ 96 int passthrough = (device_get_parent(child) != bus); 97 int isdefault = (start == 0UL && end == ~0UL); 98 struct isa_device* idev = DEVTOISA(child); 99 struct resource_list *rl = &idev->id_resources; 100 struct resource_list_entry *rle; 101 102 if (!passthrough && !isdefault) { 103 rle = resource_list_find(rl, type, *rid); 104 if (!rle) { 105 if (*rid < 0) 106 return 0; 107 switch (type) { 108 case SYS_RES_IRQ: 109 if (*rid >= ISA_NIRQ) 110 return 0; 111 break; 112 case SYS_RES_DRQ: 113 if (*rid >= ISA_NDRQ) 114 return 0; 115 break; 116 case SYS_RES_MEMORY: 117 if (*rid >= ISA_NMEM) 118 return 0; 119 break; 120 case SYS_RES_IOPORT: 121 if (*rid >= ISA_NPORT) 122 return 0; 123 break; 124 default: 125 return 0; 126 } 127 resource_list_add(rl, type, *rid, start, end, count); 128 } 129 } 130 131 return resource_list_alloc(rl, bus, child, type, rid, 132 start, end, count, flags); 133 } 134 135 #ifdef PC98 136 /* 137 * Indirection support. The type of bus_space_handle_t is 138 * defined in sys/i386/include/bus_pc98.h. 139 */ 140 struct resource * 141 isa_alloc_resourcev(device_t child, int type, int *rid, 142 bus_addr_t *res, bus_size_t count, u_int flags) 143 { 144 struct isa_device* idev = DEVTOISA(child); 145 struct resource_list *rl = &idev->id_resources; 146 147 device_t bus = device_get_parent(child); 148 bus_addr_t start; 149 bus_space_handle_t bh; 150 struct resource *re; 151 struct resource **bsre; 152 int i, j, k, linear_cnt, ressz, bsrid; 153 154 start = bus_get_resource_start(child, type, *rid); 155 156 linear_cnt = count; 157 ressz = 1; 158 for (i = 1; i < count; ++i) { 159 if (res[i] != res[i - 1] + 1) { 160 if (i < linear_cnt) 161 linear_cnt = i; 162 ++ressz; 163 } 164 } 165 166 re = isa_alloc_resource(bus, child, type, rid, 167 start + res[0], start + res[linear_cnt - 1], 168 linear_cnt, flags); 169 if (re == NULL) 170 return NULL; 171 172 bsre = malloc(sizeof (struct resource *) * ressz, M_DEVBUF, M_NOWAIT); 173 if (bsre == NULL) { 174 resource_list_release(rl, bus, child, type, *rid, re); 175 return NULL; 176 } 177 bsre[0] = re; 178 179 for (i = linear_cnt, k = 1; i < count; i = j, k++) { 180 for (j = i + 1; j < count; j++) { 181 if (res[j] != res[j - 1] + 1) 182 break; 183 } 184 bsrid = *rid + k; 185 bsre[k] = isa_alloc_resource(bus, child, type, &bsrid, 186 start + res[i], start + res[j - 1], j - i, flags); 187 if (bsre[k] == NULL) { 188 for (k--; k >= 0; k--) 189 resource_list_release(rl, bus, child, type, 190 *rid + k, bsre[k]); 191 free(bsre, M_DEVBUF); 192 return NULL; 193 } 194 } 195 196 bh = rman_get_bushandle(re); 197 bh->bsh_res = bsre; 198 bh->bsh_ressz = ressz; 199 200 return re; 201 } 202 203 int 204 isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count) 205 { 206 207 return bus_space_map_load(rman_get_bustag(re), rman_get_bushandle(re), 208 count, res, 0); 209 } 210 #endif /* PC98 */ 211 212 int 213 isa_release_resource(device_t bus, device_t child, int type, int rid, 214 struct resource *r) 215 { 216 struct isa_device* idev = DEVTOISA(child); 217 struct resource_list *rl = &idev->id_resources; 218 #ifdef PC98 219 /* 220 * Indirection support. The type of bus_space_handle_t is 221 * defined in sys/i386/include/bus_pc98.h. 222 */ 223 int i; 224 bus_space_handle_t bh; 225 226 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 227 bh = rman_get_bushandle(r); 228 if (bh != NULL) { 229 for (i = 1; i < bh->bsh_ressz; i++) 230 resource_list_release(rl, bus, child, type, 231 rid + i, bh->bsh_res[i]); 232 if (bh->bsh_res != NULL) 233 free(bh->bsh_res, M_DEVBUF); 234 } 235 } 236 #endif 237 return resource_list_release(rl, bus, child, type, rid, r); 238 } 239 240 /* 241 * On this platform, isa can also attach to the legacy bus. 242 */ 243 DRIVER_MODULE(isa, legacy, isa_driver, isa_devclass, 0, 0); 244