1 /*-
2 * Copyright (c) 2003 Nate Lawson
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: releng/10.1/sys/dev/acpica/acpi_package.c 202771 2010-01-21 21:14:28Z jkim $");
29
30 #include <sys/param.h>
31 #include <sys/kernel.h>
32 #include <sys/bus.h>
33 #include <sys/sbuf.h>
34
35 #include <machine/bus.h>
36 #include <machine/resource.h>
37 #include <sys/rman.h>
38
39 #include <contrib/dev/acpica/include/acpi.h>
40
41 #include <dev/acpica/acpivar.h>
42
43 /*
44 * Package manipulation convenience functions
45 */
46
47 int
48 acpi_PkgInt(ACPI_OBJECT *res, int idx, UINT64 *dst)
49 {
50 ACPI_OBJECT *obj;
51
52 obj = &res->Package.Elements[idx];
53 if (obj == NULL || obj->Type != ACPI_TYPE_INTEGER)
54 return (EINVAL);
55 *dst = obj->Integer.Value;
56
57 return (0);
58 }
59
60 int
61 acpi_PkgInt32(ACPI_OBJECT *res, int idx, uint32_t *dst)
62 {
63 UINT64 tmp;
64 int error;
65
66 error = acpi_PkgInt(res, idx, &tmp);
67 if (error == 0)
68 *dst = (uint32_t)tmp;
69
70 return (error);
71 }
72
73 int
74 acpi_PkgStr(ACPI_OBJECT *res, int idx, void *dst, size_t size)
75 {
76 ACPI_OBJECT *obj;
77 void *ptr;
78 size_t length;
79
80 obj = &res->Package.Elements[idx];
81 if (obj == NULL)
82 return (EINVAL);
83 bzero(dst, sizeof(dst));
84
85 switch (obj->Type) {
86 case ACPI_TYPE_STRING:
87 ptr = obj->String.Pointer;
88 length = obj->String.Length;
89 break;
90 case ACPI_TYPE_BUFFER:
91 ptr = obj->Buffer.Pointer;
92 length = obj->Buffer.Length;
93 break;
94 default:
95 return (EINVAL);
96 }
97
98 /* Make sure string will fit, including terminating NUL */
99 if (++length > size)
100 return (E2BIG);
101
102 strlcpy(dst, ptr, length);
103 return (0);
104 }
105
106 int
107 acpi_PkgGas(device_t dev, ACPI_OBJECT *res, int idx, int *type, int *rid,
108 struct resource **dst, u_int flags)
109 {
110 ACPI_GENERIC_ADDRESS gas;
111 ACPI_OBJECT *obj;
112
113 obj = &res->Package.Elements[idx];
114 if (obj == NULL || obj->Type != ACPI_TYPE_BUFFER ||
115 obj->Buffer.Length < sizeof(ACPI_GENERIC_ADDRESS) + 3)
116 return (EINVAL);
117
118 memcpy(&gas, obj->Buffer.Pointer + 3, sizeof(gas));
119
120 return (acpi_bus_alloc_gas(dev, type, rid, &gas, dst, flags));
121 }
122
123 ACPI_HANDLE
124 acpi_GetReference(ACPI_HANDLE scope, ACPI_OBJECT *obj)
125 {
126 ACPI_HANDLE h;
127
128 if (obj == NULL)
129 return (NULL);
130
131 switch (obj->Type) {
132 case ACPI_TYPE_LOCAL_REFERENCE:
133 case ACPI_TYPE_ANY:
134 h = obj->Reference.Handle;
135 break;
136 case ACPI_TYPE_STRING:
137 /*
138 * The String object usually contains a fully-qualified path, so
139 * scope can be NULL.
140 *
141 * XXX This may not always be the case.
142 */
143 if (ACPI_FAILURE(AcpiGetHandle(scope, obj->String.Pointer, &h)))
144 h = NULL;
145 break;
146 default:
147 h = NULL;
148 break;
149 }
150
151 return (h);
152 }
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