1 /*-
2 * SPDX-License-Identifier: (BSD-2-Clause AND ISC)
3 *
4 * Copyright (c) 1998 Doug Rabson
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
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
isa_init(device_t dev)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 *
isa_alloc_resource(device_t bus,device_t child,int type,int * rid,rman_res_t start,rman_res_t end,rman_res_t count,u_int flags)87 isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
88 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
89 {
90 /*
91 * Consider adding a resource definition.
92 */
93 int passthrough = (device_get_parent(child) != bus);
94 int isdefault = RMAN_IS_DEFAULT_RANGE(start, end);
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
isa_release_resource(device_t bus,device_t child,struct resource * r)133 isa_release_resource(device_t bus, device_t child, struct resource *r)
134 {
135 struct isa_device* idev = DEVTOISA(child);
136 struct resource_list *rl = &idev->id_resources;
137
138 return resource_list_release(rl, bus, child, r);
139 }
140
141 /*
142 * On this platform, isa can also attach to the legacy bus.
143 */
144 DRIVER_MODULE(isa, legacy, isa_driver, 0, 0);
145
146 /*
147 * Attach the ISA bus to the xenpv bus in order to get syscons.
148 */
149 DRIVER_MODULE(isa, xenpv, isa_driver, 0, 0);
150