2 * Copyright (c) 1998 Doug Rabson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 * Modifications for Intel architecture by Garrett A. Wollman.
32 * Copyright 1998 Massachusetts Institute of Technology
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
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
60 #include <sys/param.h>
62 #include <sys/kernel.h>
63 #include <sys/malloc.h>
64 #include <sys/module.h>
65 #include <machine/bus.h>
68 #include <sys/systm.h>
71 #include <machine/resource.h>
73 #include <isa/isavar.h>
74 #include <isa/isa_common.h>
77 isa_init(device_t dev)
82 * This implementation simply passes the request up to the parent
83 * bus, which in our case is the special i386 nexus, substituting any
84 * configured values if the caller defaulted. We can get away with
85 * this because there is no special mapping for ISA resources on an Intel
86 * platform. When porting this code to another architecture, it may be
87 * necessary to interpose a mapping layer here.
90 isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
91 u_long start, u_long end, u_long count, u_int flags)
94 * Consider adding a resource definition.
96 int passthrough = (device_get_parent(child) != bus);
97 int isdefault = (start == 0UL && end == ~0UL);
98 struct isa_device* idev = DEVTOISA(child);
99 struct resource_list *rl = &idev->id_resources;
100 struct resource_list_entry *rle;
102 if (!passthrough && !isdefault) {
103 rle = resource_list_find(rl, type, *rid);
109 if (*rid >= ISA_NIRQ)
113 if (*rid >= ISA_NDRQ)
117 if (*rid >= ISA_NMEM)
121 if (*rid >= ISA_NPORT)
127 resource_list_add(rl, type, *rid, start, end, count);
131 return resource_list_alloc(rl, bus, child, type, rid,
132 start, end, count, flags);
137 * Indirection support. The type of bus_space_handle_t is
138 * defined in sys/i386/include/bus_pc98.h.
141 isa_alloc_resourcev(device_t child, int type, int *rid,
142 bus_addr_t *res, bus_size_t count, u_int flags)
144 struct isa_device* idev = DEVTOISA(child);
145 struct resource_list *rl = &idev->id_resources;
147 device_t bus = device_get_parent(child);
149 bus_space_handle_t bh;
151 struct resource **bsre;
152 int i, j, k, linear_cnt, ressz, bsrid;
154 start = bus_get_resource_start(child, type, *rid);
158 for (i = 1; i < count; ++i) {
159 if (res[i] != res[i - 1] + 1) {
166 re = isa_alloc_resource(bus, child, type, rid,
167 start + res[0], start + res[linear_cnt - 1],
172 bsre = malloc(sizeof (struct resource *) * ressz, M_DEVBUF, M_NOWAIT);
174 resource_list_release(rl, bus, child, type, *rid, re);
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)
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,
191 free(bsre, M_DEVBUF);
196 bh = rman_get_bushandle(re);
198 bh->bsh_ressz = ressz;
204 isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count)
207 return bus_space_map_load(rman_get_bustag(re), rman_get_bushandle(re),
213 isa_release_resource(device_t bus, device_t child, int type, int rid,
216 struct isa_device* idev = DEVTOISA(child);
217 struct resource_list *rl = &idev->id_resources;
220 * Indirection support. The type of bus_space_handle_t is
221 * defined in sys/i386/include/bus_pc98.h.
224 bus_space_handle_t bh;
226 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
227 bh = rman_get_bushandle(r);
229 for (i = 1; i < bh->bsh_ressz; i++)
230 resource_list_release(rl, bus, child, type,
231 rid + i, bh->bsh_res[i]);
232 if (bh->bsh_res != NULL)
233 free(bh->bsh_res, M_DEVBUF);
237 return resource_list_release(rl, bus, child, type, rid, r);
241 * We can't use the bus_generic_* versions of these methods because those
242 * methods always pass the bus param as the requesting device, and we need
243 * to pass the child (the i386 nexus knows about this and is prepared to
247 isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
248 driver_filter_t filter, void (*ihand)(void *), void *arg,
251 return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags,
252 filter, ihand, arg, cookiep));
256 isa_teardown_intr(device_t bus, device_t child, struct resource *r,
259 return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie));
263 * On this platform, isa can also attach to the legacy bus.
265 DRIVER_MODULE(isa, legacy, isa_driver, isa_devclass, 0, 0);