isa.c revision 90466
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 * $FreeBSD: head/sys/i386/isa/isa.c 90466 2002-02-10 10:16:22Z nyan $ 27 */ 28 29/* 30 * Modifications for Intel architecture by Garrett A. Wollman. 31 * Copyright 1998 Massachusetts Institute of Technology 32 * 33 * Permission to use, copy, modify, and distribute this software and 34 * its documentation for any purpose and without fee is hereby 35 * granted, provided that both the above copyright notice and this 36 * permission notice appear in all copies, that both the above 37 * copyright notice and this permission notice appear in all 38 * supporting documentation, and that the name of M.I.T. not be used 39 * in advertising or publicity pertaining to distribution of the 40 * software without specific, written prior permission. M.I.T. makes 41 * no representations about the suitability of this software for any 42 * purpose. It is provided "as is" without express or implied 43 * warranty. 44 * 45 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 46 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 47 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 48 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 49 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 50 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 51 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 52 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 53 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 54 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 55 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 56 * SUCH DAMAGE. 57 */ 58 59#include <sys/param.h> 60#include <sys/bus.h> 61#include <sys/malloc.h> 62#include <machine/bus.h> 63#include <sys/rman.h> 64#ifdef PC98 65#include <sys/systm.h> 66#endif 67 68#include <machine/resource.h> 69 70#include <isa/isavar.h> 71#include <isa/isa_common.h> 72 73void 74isa_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 */ 86struct resource * 87isa_alloc_resource(device_t bus, device_t child, int type, int *rid, 88 u_long start, u_long end, u_long count, u_int flags) 89{ 90 /* 91 * Consider adding a resource definition. We allow rid 0-1 for 92 * irq and drq, 0-3 for memory and 0-7 for ports which is 93 * sufficient for isapnp. 94 */ 95 int passthrough = (device_get_parent(child) != bus); 96 int isdefault = (start == 0UL && end == ~0UL); 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#ifdef PC98 135/* 136 * Indirection support. The type of bus_space_handle_t is 137 * defined in sys/i386/include/bus_pc98.h. 138 */ 139struct resource * 140isa_alloc_resourcev(device_t child, int type, int *rid, 141 bus_addr_t *res, bus_size_t count, u_int flags) 142{ 143 struct isa_device* idev = DEVTOISA(child); 144 struct resource_list *rl = &idev->id_resources; 145 146 device_t bus = device_get_parent(child); 147 bus_addr_t start; 148 struct resource *re; 149 struct resource **bsre; 150 int i, j, k, linear_cnt, ressz, bsrid; 151 152 start = bus_get_resource_start(child, type, *rid); 153 154 linear_cnt = count; 155 ressz = 1; 156 for (i = 1; i < count; ++i) { 157 if (res[i] != res[i - 1] + 1) { 158 if (i < linear_cnt) 159 linear_cnt = i; 160 ++ressz; 161 } 162 } 163 164 re = isa_alloc_resource(bus, child, type, rid, 165 start + res[0], start + res[linear_cnt - 1], 166 linear_cnt, flags); 167 if (re == NULL) 168 return NULL; 169 170 bsre = malloc(sizeof (struct resource *) * ressz, M_DEVBUF, M_NOWAIT); 171 if (bsre == NULL) { 172 resource_list_release(rl, bus, child, type, *rid, re); 173 return NULL; 174 } 175 bsre[0] = re; 176 177 for (i = linear_cnt, k = 1; i < count; i = j, k++) { 178 for (j = i + 1; j < count; j++) { 179 if (res[j] != res[j - 1] + 1) 180 break; 181 } 182 bsrid = *rid + k; 183 bsre[k] = isa_alloc_resource(bus, child, type, &bsrid, 184 start + res[i], start + res[j - 1], j - i, flags); 185 if (bsre[k] == NULL) { 186 for (k--; k >= 0; k--) 187 resource_list_release(rl, bus, child, type, 188 *rid + k, bsre[k]); 189 free(bsre, M_DEVBUF); 190 return NULL; 191 } 192 } 193 194 re->r_bushandle->bsh_res = bsre; 195 re->r_bushandle->bsh_ressz = ressz; 196 197 return re; 198} 199 200int 201isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count) 202{ 203 bus_addr_t start; 204 int i; 205 206 if (count > re->r_bushandle->bsh_maxiatsz) { 207 printf("isa_load_resourcev: map size too large\n"); 208 return EINVAL; 209 } 210 211 start = rman_get_start(re); 212 for (i = 0; i < re->r_bushandle->bsh_maxiatsz; i++) { 213 if (i < count) 214 re->r_bushandle->bsh_iat[i] = start + res[i]; 215 else 216 re->r_bushandle->bsh_iat[i] = start; 217 } 218 219 re->r_bushandle->bsh_iatsz = count; 220 re->r_bushandle->bsh_bam = re->r_bustag->bs_ra; /* relocate access */ 221 222 return 0; 223} 224#endif /* PC98 */ 225 226int 227isa_release_resource(device_t bus, device_t child, int type, int rid, 228 struct resource *r) 229{ 230 struct isa_device* idev = DEVTOISA(child); 231 struct resource_list *rl = &idev->id_resources; 232#ifdef PC98 233 /* 234 * Indirection support. The type of bus_space_handle_t is 235 * defined in sys/i386/include/bus_pc98.h. 236 */ 237 int i; 238 239 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#endif 245 return resource_list_release(rl, bus, child, type, rid, r); 246} 247 248/* 249 * We can't use the bus_generic_* versions of these methods because those 250 * methods always pass the bus param as the requesting device, and we need 251 * to pass the child (the i386 nexus knows about this and is prepared to 252 * deal). 253 */ 254int 255isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags, 256 void (*ihand)(void *), void *arg, void **cookiep) 257{ 258 return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags, 259 ihand, arg, cookiep)); 260} 261 262int 263isa_teardown_intr(device_t bus, device_t child, struct resource *r, 264 void *cookie) 265{ 266 return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie)); 267} 268