isa.c revision 127139
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: head/sys/i386/isa/isa.c 127139 2004-03-17 19:04:58Z jmg $"); 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/malloc.h> 63#include <machine/bus.h> 64#include <sys/rman.h> 65#ifdef PC98 66#include <sys/systm.h> 67#endif 68 69#include <machine/resource.h> 70 71#include <isa/isavar.h> 72#include <isa/isa_common.h> 73 74void 75isa_init(device_t dev) 76{ 77} 78 79/* 80 * This implementation simply passes the request up to the parent 81 * bus, which in our case is the special i386 nexus, substituting any 82 * configured values if the caller defaulted. We can get away with 83 * this because there is no special mapping for ISA resources on an Intel 84 * platform. When porting this code to another architecture, it may be 85 * necessary to interpose a mapping layer here. 86 */ 87struct resource * 88isa_alloc_resource(device_t bus, device_t child, int type, int *rid, 89 u_long start, u_long end, u_long count, u_int flags) 90{ 91 /* 92 * Consider adding a resource definition. 93 */ 94 int passthrough = (device_get_parent(child) != bus); 95 int isdefault = (start == 0UL && end == ~0UL); 96 struct isa_device* idev = DEVTOISA(child); 97 struct resource_list *rl = &idev->id_resources; 98 struct resource_list_entry *rle; 99 100 if (!passthrough && !isdefault) { 101 rle = resource_list_find(rl, type, *rid); 102 if (!rle) { 103 if (*rid < 0) 104 return 0; 105 switch (type) { 106 case SYS_RES_IRQ: 107 if (*rid >= ISA_NIRQ) 108 return 0; 109 break; 110 case SYS_RES_DRQ: 111 if (*rid >= ISA_NDRQ) 112 return 0; 113 break; 114 case SYS_RES_MEMORY: 115 if (*rid >= ISA_NMEM) 116 return 0; 117 break; 118 case SYS_RES_IOPORT: 119 if (*rid >= ISA_NPORT) 120 return 0; 121 break; 122 default: 123 return 0; 124 } 125 resource_list_add(rl, type, *rid, start, end, count); 126 } 127 } 128 129 return resource_list_alloc(rl, bus, child, type, rid, 130 start, end, count, flags); 131} 132 133#ifdef PC98 134/* 135 * Indirection support. The type of bus_space_handle_t is 136 * defined in sys/i386/include/bus_pc98.h. 137 */ 138struct resource * 139isa_alloc_resourcev(device_t child, int type, int *rid, 140 bus_addr_t *res, bus_size_t count, u_int flags) 141{ 142 struct isa_device* idev = DEVTOISA(child); 143 struct resource_list *rl = &idev->id_resources; 144 145 device_t bus = device_get_parent(child); 146 bus_addr_t start; 147 struct resource *re; 148 struct resource **bsre; 149 int i, j, k, linear_cnt, ressz, bsrid; 150 151 start = bus_get_resource_start(child, type, *rid); 152 153 linear_cnt = count; 154 ressz = 1; 155 for (i = 1; i < count; ++i) { 156 if (res[i] != res[i - 1] + 1) { 157 if (i < linear_cnt) 158 linear_cnt = i; 159 ++ressz; 160 } 161 } 162 163 re = isa_alloc_resource(bus, child, type, rid, 164 start + res[0], start + res[linear_cnt - 1], 165 linear_cnt, flags); 166 if (re == NULL) 167 return NULL; 168 169 bsre = malloc(sizeof (struct resource *) * ressz, M_DEVBUF, M_NOWAIT); 170 if (bsre == NULL) { 171 resource_list_release(rl, bus, child, type, *rid, re); 172 return NULL; 173 } 174 bsre[0] = re; 175 176 for (i = linear_cnt, k = 1; i < count; i = j, k++) { 177 for (j = i + 1; j < count; j++) { 178 if (res[j] != res[j - 1] + 1) 179 break; 180 } 181 bsrid = *rid + k; 182 bsre[k] = isa_alloc_resource(bus, child, type, &bsrid, 183 start + res[i], start + res[j - 1], j - i, flags); 184 if (bsre[k] == NULL) { 185 for (k--; k >= 0; k--) 186 resource_list_release(rl, bus, child, type, 187 *rid + k, bsre[k]); 188 free(bsre, M_DEVBUF); 189 return NULL; 190 } 191 } 192 193 re->r_bushandle->bsh_res = bsre; 194 re->r_bushandle->bsh_ressz = ressz; 195 196 return re; 197} 198 199int 200isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count) 201{ 202 bus_addr_t start; 203 int i; 204 205 if (count > re->r_bushandle->bsh_maxiatsz) { 206 printf("isa_load_resourcev: map size too large\n"); 207 return EINVAL; 208 } 209 210 start = rman_get_start(re); 211 for (i = 0; i < re->r_bushandle->bsh_maxiatsz; i++) { 212 if (i < count) 213 re->r_bushandle->bsh_iat[i] = start + res[i]; 214 else 215 re->r_bushandle->bsh_iat[i] = start; 216 } 217 218 re->r_bushandle->bsh_iatsz = count; 219 re->r_bushandle->bsh_bam = re->r_bustag->bs_ra; /* relocate access */ 220 221 return 0; 222} 223#endif /* PC98 */ 224 225int 226isa_release_resource(device_t bus, device_t child, int type, int rid, 227 struct resource *r) 228{ 229 struct isa_device* idev = DEVTOISA(child); 230 struct resource_list *rl = &idev->id_resources; 231#ifdef PC98 232 /* 233 * Indirection support. The type of bus_space_handle_t is 234 * defined in sys/i386/include/bus_pc98.h. 235 */ 236 int i; 237 238 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 239 for (i = 1; i < r->r_bushandle->bsh_ressz; i++) 240 resource_list_release(rl, bus, child, type, rid + i, 241 r->r_bushandle->bsh_res[i]); 242 if (r->r_bushandle->bsh_res != NULL) 243 free(r->r_bushandle->bsh_res, M_DEVBUF); 244 } 245#endif 246 return resource_list_release(rl, bus, child, type, rid, r); 247} 248 249/* 250 * We can't use the bus_generic_* versions of these methods because those 251 * methods always pass the bus param as the requesting device, and we need 252 * to pass the child (the i386 nexus knows about this and is prepared to 253 * deal). 254 */ 255int 256isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags, 257 void (*ihand)(void *), void *arg, void **cookiep) 258{ 259 return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags, 260 ihand, arg, cookiep)); 261} 262 263int 264isa_teardown_intr(device_t bus, device_t child, struct resource *r, 265 void *cookie) 266{ 267 return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie)); 268} 269