isa.c revision 131405
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 131405 2004-07-01 09:36:31Z nyan $"); 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#ifdef PC98 61#define __RMAN_RESOURCE_VISIBLE 62#endif 63#include <sys/param.h> 64#include <sys/bus.h> 65#include <sys/malloc.h> 66#include <machine/bus.h> 67#include <sys/rman.h> 68#ifdef PC98 69#include <sys/systm.h> 70#endif 71 72#include <machine/resource.h> 73 74#include <isa/isavar.h> 75#include <isa/isa_common.h> 76 77void 78isa_init(device_t dev) 79{ 80} 81 82/* 83 * This implementation simply passes the request up to the parent 84 * bus, which in our case is the special i386 nexus, substituting any 85 * configured values if the caller defaulted. We can get away with 86 * this because there is no special mapping for ISA resources on an Intel 87 * platform. When porting this code to another architecture, it may be 88 * necessary to interpose a mapping layer here. 89 */ 90struct resource * 91isa_alloc_resource(device_t bus, device_t child, int type, int *rid, 92 u_long start, u_long end, u_long count, u_int flags) 93{ 94 /* 95 * Consider adding a resource definition. 96 */ 97 int passthrough = (device_get_parent(child) != bus); 98 int isdefault = (start == 0UL && end == ~0UL); 99 struct isa_device* idev = DEVTOISA(child); 100 struct resource_list *rl = &idev->id_resources; 101 struct resource_list_entry *rle; 102 103 if (!passthrough && !isdefault) { 104 rle = resource_list_find(rl, type, *rid); 105 if (!rle) { 106 if (*rid < 0) 107 return 0; 108 switch (type) { 109 case SYS_RES_IRQ: 110 if (*rid >= ISA_NIRQ) 111 return 0; 112 break; 113 case SYS_RES_DRQ: 114 if (*rid >= ISA_NDRQ) 115 return 0; 116 break; 117 case SYS_RES_MEMORY: 118 if (*rid >= ISA_NMEM) 119 return 0; 120 break; 121 case SYS_RES_IOPORT: 122 if (*rid >= ISA_NPORT) 123 return 0; 124 break; 125 default: 126 return 0; 127 } 128 resource_list_add(rl, type, *rid, start, end, count); 129 } 130 } 131 132 return resource_list_alloc(rl, bus, child, type, rid, 133 start, end, count, flags); 134} 135 136#ifdef PC98 137/* 138 * Indirection support. The type of bus_space_handle_t is 139 * defined in sys/i386/include/bus_pc98.h. 140 */ 141struct resource * 142isa_alloc_resourcev(device_t child, int type, int *rid, 143 bus_addr_t *res, bus_size_t count, u_int flags) 144{ 145 struct isa_device* idev = DEVTOISA(child); 146 struct resource_list *rl = &idev->id_resources; 147 148 device_t bus = device_get_parent(child); 149 bus_addr_t start; 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 re->r_bushandle->bsh_res = bsre; 197 re->r_bushandle->bsh_ressz = ressz; 198 199 return re; 200} 201 202int 203isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count) 204{ 205 bus_addr_t start; 206 int i; 207 208 if (count > re->r_bushandle->bsh_maxiatsz) { 209 printf("isa_load_resourcev: map size too large\n"); 210 return EINVAL; 211 } 212 213 start = rman_get_start(re); 214 for (i = 0; i < re->r_bushandle->bsh_maxiatsz; i++) { 215 if (i < count) 216 re->r_bushandle->bsh_iat[i] = start + res[i]; 217 else 218 re->r_bushandle->bsh_iat[i] = start; 219 } 220 221 re->r_bushandle->bsh_iatsz = count; 222 re->r_bushandle->bsh_bam = re->r_bustag->bs_ra; /* relocate access */ 223 224 return 0; 225} 226#endif /* PC98 */ 227 228int 229isa_release_resource(device_t bus, device_t child, int type, int rid, 230 struct resource *r) 231{ 232 struct isa_device* idev = DEVTOISA(child); 233 struct resource_list *rl = &idev->id_resources; 234#ifdef PC98 235 /* 236 * Indirection support. The type of bus_space_handle_t is 237 * defined in sys/i386/include/bus_pc98.h. 238 */ 239 int i; 240 241 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 242 for (i = 1; i < r->r_bushandle->bsh_ressz; i++) 243 resource_list_release(rl, bus, child, type, rid + i, 244 r->r_bushandle->bsh_res[i]); 245 if (r->r_bushandle->bsh_res != NULL) 246 free(r->r_bushandle->bsh_res, M_DEVBUF); 247 } 248#endif 249 return resource_list_release(rl, bus, child, type, rid, r); 250} 251 252/* 253 * We can't use the bus_generic_* versions of these methods because those 254 * methods always pass the bus param as the requesting device, and we need 255 * to pass the child (the i386 nexus knows about this and is prepared to 256 * deal). 257 */ 258int 259isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags, 260 void (*ihand)(void *), void *arg, void **cookiep) 261{ 262 return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags, 263 ihand, arg, cookiep)); 264} 265 266int 267isa_teardown_intr(device_t bus, device_t child, struct resource *r, 268 void *cookie) 269{ 270 return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie)); 271} 272