isa.c revision 88376
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 88376 2001-12-21 21:54:56Z tmm $ 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 65#include <machine/resource.h> 66 67#include <isa/isavar.h> 68#include <isa/isa_common.h> 69 70void 71isa_init(device_t dev) 72{ 73} 74 75/* 76 * This implementation simply passes the request up to the parent 77 * bus, which in our case is the special i386 nexus, substituting any 78 * configured values if the caller defaulted. We can get away with 79 * this because there is no special mapping for ISA resources on an Intel 80 * platform. When porting this code to another architecture, it may be 81 * necessary to interpose a mapping layer here. 82 */ 83struct resource * 84isa_alloc_resource(device_t bus, device_t child, int type, int *rid, 85 u_long start, u_long end, u_long count, u_int flags) 86{ 87 /* 88 * Consider adding a resource definition. We allow rid 0-1 for 89 * irq and drq, 0-3 for memory and 0-7 for ports which is 90 * sufficient for isapnp. 91 */ 92 int passthrough = (device_get_parent(child) != bus); 93 int isdefault = (start == 0UL && end == ~0UL); 94 struct isa_device* idev = DEVTOISA(child); 95 struct resource_list *rl = &idev->id_resources; 96 struct resource_list_entry *rle; 97 98 if (!passthrough && !isdefault) { 99 rle = resource_list_find(rl, type, *rid); 100 if (!rle) { 101 if (*rid < 0) 102 return 0; 103 switch (type) { 104 case SYS_RES_IRQ: 105 if (*rid >= ISA_NIRQ) 106 return 0; 107 break; 108 case SYS_RES_DRQ: 109 if (*rid >= ISA_NDRQ) 110 return 0; 111 break; 112 case SYS_RES_MEMORY: 113 if (*rid >= ISA_NMEM) 114 return 0; 115 break; 116 case SYS_RES_IOPORT: 117 if (*rid >= ISA_NPORT) 118 return 0; 119 break; 120 default: 121 return 0; 122 } 123 resource_list_add(rl, type, *rid, start, end, count); 124 } 125 } 126 127 return resource_list_alloc(rl, bus, child, type, rid, 128 start, end, count, flags); 129} 130 131#ifdef PC98 132/* 133 * Indirection support. The type of bus_space_handle_t is 134 * defined in sys/i386/include/bus_pc98.h. 135 */ 136struct resource * 137isa_alloc_resourcev(device_t child, int type, int *rid, 138 bus_addr_t *res, bus_size_t count, u_int flags) 139{ 140 struct isa_device* idev = DEVTOISA(child); 141 struct resource_list *rl = &idev->id_resources; 142 143 device_t bus = device_get_parent(child); 144 bus_addr_t start; 145 struct resource *re; 146 struct resource **bsre; 147 int i, j, k, linear_cnt, ressz, bsrid; 148 149 start = bus_get_resource_start(child, type, *rid); 150 151 linear_cnt = count; 152 ressz = 1; 153 for (i = 1; i < count; ++i) { 154 if (res[i] != res[i - 1] + 1) { 155 if (i < linear_cnt) 156 linear_cnt = i; 157 ++ressz; 158 } 159 } 160 161 re = isa_alloc_resource(bus, child, type, rid, 162 start + res[0], start + res[linear_cnt - 1], 163 linear_cnt, flags); 164 if (re == NULL) 165 return NULL; 166 167 bsre = malloc(sizeof (struct resource *) * ressz, M_DEVBUF, M_NOWAIT); 168 if (bsre == NULL) { 169 resource_list_release(rl, bus, child, type, *rid, re); 170 return NULL; 171 } 172 bsre[0] = re; 173 174 for (i = linear_cnt, k = 1; i < count; i = j, k++) { 175 for (j = i + 1; j < count; j++) { 176 if (res[j] != res[j - 1] + 1) 177 break; 178 } 179 bsrid = *rid + k; 180 bsre[k] = isa_alloc_resource(bus, child, type, &bsrid, 181 start + res[i], start + res[j - 1], j - i, flags); 182 if (bsre[k] == NULL) { 183 for (k--; k >= 0; k--) 184 resource_list_release(rl, bus, child, type, 185 *rid + k, bsre[k]); 186 free(bsre, M_DEVBUF); 187 return NULL; 188 } 189 } 190 191 re->r_bushandle->bsh_res = bsre; 192 re->r_bushandle->bsh_ressz = ressz; 193 194 return re; 195} 196 197int 198isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count) 199{ 200 bus_addr_t start; 201 int i; 202 203 if (count > re->r_bushandle->bsh_maxiatsz) { 204 printf("isa_load_resourcev: map size too large\n"); 205 return EINVAL; 206 } 207 208 start = rman_get_start(re); 209 for (i = 0; i < re->r_bushandle->bsh_maxiatsz; i++) { 210 if (i < count) 211 re->r_bushandle->bsh_iat[i] = start + res[i]; 212 else 213 re->r_bushandle->bsh_iat[i] = start; 214 } 215 216 re->r_bushandle->bsh_iatsz = count; 217 re->r_bushandle->bsh_bam = re->r_bustag->bs_ra; /* relocate access */ 218 219 return 0; 220} 221#endif /* PC98 */ 222 223int 224isa_release_resource(device_t bus, device_t child, int type, int rid, 225 struct resource *r) 226{ 227 struct isa_device* idev = DEVTOISA(child); 228 struct resource_list *rl = &idev->id_resources; 229#ifdef PC98 230 /* 231 * Indirection support. The type of bus_space_handle_t is 232 * defined in sys/i386/include/bus_pc98.h. 233 */ 234 int i; 235 236 for (i = 1; i < r->r_bushandle->bsh_ressz; i++) 237 resource_list_release(rl, bus, child, type, rid + i, 238 r->r_bushandle->bsh_res[i]); 239 if (r->r_bushandle->bsh_res != NULL) 240 free(r->r_bushandle->bsh_res, M_DEVBUF); 241#endif 242 return resource_list_release(rl, bus, child, type, rid, r); 243} 244 245/* 246 * We can't use the bus_generic_* versions of these methods because those 247 * methods always pass the bus param as the requesting device, and we need 248 * to pass the child (the i386 nexus knows about this and is prepared to 249 * deal). 250 */ 251int 252isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags, 253 void (*ihand)(void *), void *arg, void **cookiep) 254{ 255 return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags, 256 ihand, arg, cookiep)); 257} 258 259int 260isa_teardown_intr(device_t bus, device_t child, struct resource *r, 261 void *cookie) 262{ 263 return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie)); 264} 265