cxgbe/t4_tom: Read the chip's DDP page sizes and save them in a
[freebsd-src.git] / sys / isa / isahint.c
blob5eccef85949db00ca3caad2b51b3d03265839cec
1 /*-
2 * Copyright (c) 1999 Doug Rabson
3 * All rights reserved.
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.
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.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
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>
39 void
40 isa_hinted_child(device_t parent, const char *name, int unit)
42 device_t child;
43 int sensitive, start, count;
44 int order;
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);
51 if (sensitive)
52 order = ISA_ORDER_SENSITIVE;
53 else
54 order = ISA_ORDER_SPECULATIVE;
56 child = BUS_ADD_CHILD(parent, order, name, unit);
57 if (child == 0)
58 return;
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);
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);
74 if (resource_int_value(name, unit, "irq", &start) == 0 && start > 0)
75 bus_set_resource(child, SYS_RES_IRQ, 0, start, 1);
77 if (resource_int_value(name, unit, "drq", &start) == 0 && start >= 0)
78 bus_set_resource(child, SYS_RES_DRQ, 0, start, 1);
80 if (resource_disabled(name, unit))
81 device_disable(child);
83 isa_set_configattr(child, (isa_get_configattr(child)|ISACFGATTR_HINTS));
86 static int
87 isa_match_resource_hint(device_t dev, int type, long value)
89 struct isa_device* idev = DEVTOISA(dev);
90 struct resource_list *rl = &idev->id_resources;
91 struct resource_list_entry *rle;
93 STAILQ_FOREACH(rle, rl, link) {
94 if (rle->type != type)
95 continue;
96 if (rle->start <= value && rle->end >= value)
97 return (1);
99 return (0);
102 void
103 isa_hint_device_unit(device_t bus, device_t child, const char *name, int *unitp)
105 const char *s;
106 long value;
107 int line, matches, unit;
109 line = 0;
110 for (;;) {
111 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0)
112 break;
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;
121 * Check for matching resources. We must have at
122 * least one match. Since I/O and memory resources
123 * cannot be shared, if we get a match on either of
124 * those, ignore any mismatches in IRQs or DRQs.
126 * XXX: We may want to revisit this to be more lenient
127 * and wire as long as it gets one match.
129 matches = 0;
130 if (resource_long_value(name, unit, "port", &value) == 0) {
132 * Floppy drive controllers are notorious for
133 * having a wide variety of resources not all
134 * of which include the first port that is
135 * specified by the hint (typically 0x3f0)
136 * (see the comment above
137 * fdc_isa_alloc_resources() in fdc_isa.c).
138 * However, they do all seem to include port +
139 * 2 (e.g. 0x3f2) so for a floppy device, look
140 * for 'value + 2' in the port resources
141 * instead of the hint value.
143 if (strcmp(name, "fdc") == 0)
144 value += 2;
145 if (isa_match_resource_hint(child, SYS_RES_IOPORT,
146 value))
147 matches++;
148 else
149 continue;
151 if (resource_long_value(name, unit, "maddr", &value) == 0) {
152 if (isa_match_resource_hint(child, SYS_RES_MEMORY,
153 value))
154 matches++;
155 else
156 continue;
158 if (matches > 0)
159 goto matched;
160 if (resource_long_value(name, unit, "irq", &value) == 0) {
161 if (isa_match_resource_hint(child, SYS_RES_IRQ, value))
162 matches++;
163 else
164 continue;
166 if (resource_long_value(name, unit, "drq", &value) == 0) {
167 if (isa_match_resource_hint(child, SYS_RES_DRQ, value))
168 matches++;
169 else
170 continue;
173 matched:
174 if (matches > 0) {
175 /* We have a winner! */
176 *unitp = unit;
177 break;