FreeBSD/Linux Kernel Cross Reference
sys/isa/isahint.c
1 /*-
2 * Copyright (c) 1999 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/isa/isahint.c,v 1.19 2008/11/18 21:01:54 jhb Exp $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/bus.h>
34 #include <sys/module.h>
35 #include <isa/isavar.h>
36 #include <isa/isa_common.h>
37 #include <machine/resource.h>
38
39 void
40 isa_hinted_child(device_t parent, const char *name, int unit)
41 {
42 device_t child;
43 int sensitive, start, count;
44 int order;
45
46 /* device-specific flag overrides any wildcard */
47 sensitive = 0;
48 if (resource_int_value(name, unit, "sensitive", &sensitive) != 0)
49 resource_int_value(name, -1, "sensitive", &sensitive);
50
51 if (sensitive)
52 order = ISA_ORDER_SENSITIVE;
53 else
54 order = ISA_ORDER_SPECULATIVE;
55
56 child = BUS_ADD_CHILD(parent, order, name, unit);
57 if (child == 0)
58 return;
59
60 start = 0;
61 count = 0;
62 resource_int_value(name, unit, "port", &start);
63 resource_int_value(name, unit, "portsize", &count);
64 if (start > 0 || count > 0)
65 bus_set_resource(child, SYS_RES_IOPORT, 0, start, count);
66
67 start = 0;
68 count = 0;
69 resource_int_value(name, unit, "maddr", &start);
70 resource_int_value(name, unit, "msize", &count);
71 if (start > 0 || count > 0)
72 bus_set_resource(child, SYS_RES_MEMORY, 0, start, count);
73
74 if (resource_int_value(name, unit, "irq", &start) == 0 && start > 0)
75 bus_set_resource(child, SYS_RES_IRQ, 0, start, 1);
76
77 if (resource_int_value(name, unit, "drq", &start) == 0 && start >= 0)
78 bus_set_resource(child, SYS_RES_DRQ, 0, start, 1);
79
80 if (resource_disabled(name, unit))
81 device_disable(child);
82
83 isa_set_configattr(child, (isa_get_configattr(child)|ISACFGATTR_HINTS));
84 }
85
86 static int
87 isa_match_resource_hint(device_t dev, int type, long value)
88 {
89 struct isa_device* idev = DEVTOISA(dev);
90 struct resource_list *rl = &idev->id_resources;
91 struct resource_list_entry *rle;
92
93 STAILQ_FOREACH(rle, rl, link) {
94 if (rle->type != type)
95 continue;
96 if (rle->start <= value && rle->end >= value)
97 return (1);
98 }
99 return (0);
100 }
101
102 void
103 isa_hint_device_unit(device_t bus, device_t child, const char *name, int *unitp)
104 {
105 const char *s;
106 long value;
107 int line, matches, unit;
108
109 line = 0;
110 for (;;) {
111 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0)
112 break;
113
114 /* Must have an "at" for isa. */
115 resource_string_value(name, unit, "at", &s);
116 if (!(strcmp(s, device_get_nameunit(bus)) == 0 ||
117 strcmp(s, device_get_name(bus)) == 0))
118 continue;
119
120 /*
121 * Check for matching resources. We must have at least one,
122 * and all resources specified have to match.
123 *
124 * XXX: We may want to revisit this to be more lenient and wire
125 * as long as it gets one match.
126 */
127 matches = 0;
128 if (resource_long_value(name, unit, "port", &value) == 0) {
129 if (isa_match_resource_hint(child, SYS_RES_IOPORT,
130 value))
131 matches++;
132 else
133 continue;
134 }
135 if (resource_long_value(name, unit, "maddr", &value) == 0) {
136 if (isa_match_resource_hint(child, SYS_RES_MEMORY,
137 value))
138 matches++;
139 else
140 continue;
141 }
142 if (resource_long_value(name, unit, "irq", &value) == 0) {
143 if (isa_match_resource_hint(child, SYS_RES_IRQ, value))
144 matches++;
145 else
146 continue;
147 }
148 if (resource_long_value(name, unit, "drq", &value) == 0) {
149 if (isa_match_resource_hint(child, SYS_RES_DRQ, value))
150 matches++;
151 else
152 continue;
153 }
154
155 if (matches > 0) {
156 /* We have a winner! */
157 *unitp = unit;
158 break;
159 }
160 }
161 }
162
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