FreeBSD/Linux Kernel Cross Reference
sys/amd64/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: src/sys/amd64/isa/isa.c,v 1.149 2007/02/23 12:18:26 piso Exp $");
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 #include <sys/param.h>
61 #include <sys/bus.h>
62 #include <sys/kernel.h>
63 #include <sys/malloc.h>
64 #include <sys/module.h>
65 #include <machine/bus.h>
66 #include <sys/rman.h>
67
68 #include <machine/resource.h>
69
70 #include <isa/isavar.h>
71 #include <isa/isa_common.h>
72
73 void
74 isa_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 */
86 struct resource *
87 isa_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.
92 */
93 int passthrough = (device_get_parent(child) != bus);
94 int isdefault = (start == 0UL && end == ~0UL);
95 struct isa_device* idev = DEVTOISA(child);
96 struct resource_list *rl = &idev->id_resources;
97 struct resource_list_entry *rle;
98
99 if (!passthrough && !isdefault) {
100 rle = resource_list_find(rl, type, *rid);
101 if (!rle) {
102 if (*rid < 0)
103 return 0;
104 switch (type) {
105 case SYS_RES_IRQ:
106 if (*rid >= ISA_NIRQ)
107 return 0;
108 break;
109 case SYS_RES_DRQ:
110 if (*rid >= ISA_NDRQ)
111 return 0;
112 break;
113 case SYS_RES_MEMORY:
114 if (*rid >= ISA_NMEM)
115 return 0;
116 break;
117 case SYS_RES_IOPORT:
118 if (*rid >= ISA_NPORT)
119 return 0;
120 break;
121 default:
122 return 0;
123 }
124 resource_list_add(rl, type, *rid, start, end, count);
125 }
126 }
127
128 return resource_list_alloc(rl, bus, child, type, rid,
129 start, end, count, flags);
130 }
131
132 int
133 isa_release_resource(device_t bus, device_t child, int type, int rid,
134 struct resource *r)
135 {
136 struct isa_device* idev = DEVTOISA(child);
137 struct resource_list *rl = &idev->id_resources;
138
139 return resource_list_release(rl, bus, child, type, rid, r);
140 }
141
142 /*
143 * We can't use the bus_generic_* versions of these methods because those
144 * methods always pass the bus param as the requesting device, and we need
145 * to pass the child (the i386 nexus knows about this and is prepared to
146 * deal).
147 */
148 int
149 isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
150 driver_filter_t *filter, void (*ihand)(void *), void *arg,
151 void **cookiep)
152 {
153 return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags,
154 filter, ihand, arg, cookiep));
155 }
156
157 int
158 isa_teardown_intr(device_t bus, device_t child, struct resource *r,
159 void *cookie)
160 {
161 return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie));
162 }
163
164 /*
165 * On this platform, isa can also attach to the legacy bus.
166 */
167 DRIVER_MODULE(isa, legacy, isa_driver, isa_devclass, 0, 0);
168 Cache object: acfbdb56e8c8d643c8a055ab60d7bef7
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