FreeBSD/Linux Kernel Cross Reference
sys/i386/isa/isa.c
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: releng/5.3/sys/i386/isa/isa.c 131534 2004-07-03 20:11:49Z imp $");
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
77 void
78 isa_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 */
90 struct resource *
91 isa_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 */
141 struct resource *
142 isa_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 bus_space_handle_t bh;
151 struct resource *re;
152 struct resource **bsre;
153 int i, j, k, linear_cnt, ressz, bsrid;
154
155 start = bus_get_resource_start(child, type, *rid);
156
157 linear_cnt = count;
158 ressz = 1;
159 for (i = 1; i < count; ++i) {
160 if (res[i] != res[i - 1] + 1) {
161 if (i < linear_cnt)
162 linear_cnt = i;
163 ++ressz;
164 }
165 }
166
167 re = isa_alloc_resource(bus, child, type, rid,
168 start + res[0], start + res[linear_cnt - 1],
169 linear_cnt, flags);
170 if (re == NULL)
171 return NULL;
172
173 bsre = malloc(sizeof (struct resource *) * ressz, M_DEVBUF, M_NOWAIT);
174 if (bsre == NULL) {
175 resource_list_release(rl, bus, child, type, *rid, re);
176 return NULL;
177 }
178 bsre[0] = re;
179
180 for (i = linear_cnt, k = 1; i < count; i = j, k++) {
181 for (j = i + 1; j < count; j++) {
182 if (res[j] != res[j - 1] + 1)
183 break;
184 }
185 bsrid = *rid + k;
186 bsre[k] = isa_alloc_resource(bus, child, type, &bsrid,
187 start + res[i], start + res[j - 1], j - i, flags);
188 if (bsre[k] == NULL) {
189 for (k--; k >= 0; k--)
190 resource_list_release(rl, bus, child, type,
191 *rid + k, bsre[k]);
192 free(bsre, M_DEVBUF);
193 return NULL;
194 }
195 }
196
197 bh = rman_get_bushandle(re);
198 bh->bsh_res = bsre;
199 bh->bsh_ressz = ressz;
200
201 return re;
202 }
203
204 int
205 isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count)
206 {
207 bus_addr_t start;
208 bus_space_handle_t bh;
209 int i;
210
211 bh = rman_get_bushandle(re);
212 if (count > bh->bsh_maxiatsz) {
213 printf("isa_load_resourcev: map size too large\n");
214 return EINVAL;
215 }
216
217 start = rman_get_start(re);
218 for (i = 0; i < bh->bsh_maxiatsz; i++) {
219 if (i < count)
220 bh->bsh_iat[i] = start + res[i];
221 else
222 bh->bsh_iat[i] = start;
223 }
224
225 bh->bsh_iatsz = count;
226 bh->bsh_bam = rman_get_bustag(re)->bs_ra; /* relocate access */
227
228 return 0;
229 }
230 #endif /* PC98 */
231
232 int
233 isa_release_resource(device_t bus, device_t child, int type, int rid,
234 struct resource *r)
235 {
236 struct isa_device* idev = DEVTOISA(child);
237 struct resource_list *rl = &idev->id_resources;
238 #ifdef PC98
239 /*
240 * Indirection support. The type of bus_space_handle_t is
241 * defined in sys/i386/include/bus_pc98.h.
242 */
243 int i;
244 bus_space_handle_t bh;
245
246 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
247 bh = rman_get_bushandle(r);
248 for (i = 1; i < bh->bsh_ressz; i++)
249 resource_list_release(rl, bus, child, type, rid + i,
250 bh->bsh_res[i]);
251 if (bh->bsh_res != NULL)
252 free(bh->bsh_res, M_DEVBUF);
253 }
254 #endif
255 return resource_list_release(rl, bus, child, type, rid, r);
256 }
257
258 /*
259 * We can't use the bus_generic_* versions of these methods because those
260 * methods always pass the bus param as the requesting device, and we need
261 * to pass the child (the i386 nexus knows about this and is prepared to
262 * deal).
263 */
264 int
265 isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
266 void (*ihand)(void *), void *arg, void **cookiep)
267 {
268 return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags,
269 ihand, arg, cookiep));
270 }
271
272 int
273 isa_teardown_intr(device_t bus, device_t child, struct resource *r,
274 void *cookie)
275 {
276 return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie));
277 }
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