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("$FreeBSD$");
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->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_PkgInt16(ACPI_OBJECT *res, int idx, uint16_t *dst)
75 {
76 UINT64 tmp;
77 int error;
78
79 error = acpi_PkgInt(res, idx, &tmp);
80 if (error == 0)
81 *dst = (uint16_t)tmp;
82
83 return (error);
84 }
85
86 int
87 acpi_PkgStr(ACPI_OBJECT *res, int idx, void *dst, size_t size)
88 {
89 ACPI_OBJECT *obj;
90 void *ptr;
91 size_t length;
92
93 obj = &res->Package.Elements[idx];
94 if (obj == NULL)
95 return (EINVAL);
96
97 switch (obj->Type) {
98 case ACPI_TYPE_STRING:
99 ptr = obj->String.Pointer;
100 length = obj->String.Length;
101 break;
102 case ACPI_TYPE_BUFFER:
103 ptr = obj->Buffer.Pointer;
104 length = obj->Buffer.Length;
105 break;
106 default:
107 return (EINVAL);
108 }
109
110 /* Make sure string will fit, including terminating NUL */
111 if (++length > size)
112 return (E2BIG);
113
114 strlcpy(dst, ptr, length);
115 return (0);
116 }
117
118 int
119 acpi_PkgGas(device_t dev, ACPI_OBJECT *res, int idx, int *type, int *rid,
120 struct resource **dst, u_int flags)
121 {
122 ACPI_GENERIC_ADDRESS gas;
123 ACPI_OBJECT *obj;
124
125 obj = &res->Package.Elements[idx];
126 if (obj == NULL || obj->Type != ACPI_TYPE_BUFFER ||
127 obj->Buffer.Length < sizeof(ACPI_GENERIC_ADDRESS) + 3)
128 return (EINVAL);
129
130 memcpy(&gas, obj->Buffer.Pointer + 3, sizeof(gas));
131
132 return (acpi_bus_alloc_gas(dev, type, rid, &gas, dst, flags));
133 }
134
135 int
136 acpi_PkgFFH_IntelCpu(ACPI_OBJECT *res, int idx, int *vendor, int *class,
137 uint64_t *address, int *accsize)
138 {
139 ACPI_GENERIC_ADDRESS gas;
140 ACPI_OBJECT *obj;
141
142 obj = &res->Package.Elements[idx];
143 if (obj == NULL || obj->Type != ACPI_TYPE_BUFFER ||
144 obj->Buffer.Length < sizeof(ACPI_GENERIC_ADDRESS) + 3)
145 return (EINVAL);
146
147 memcpy(&gas, obj->Buffer.Pointer + 3, sizeof(gas));
148 if (gas.SpaceId != ACPI_ADR_SPACE_FIXED_HARDWARE)
149 return (ERESTART);
150 *vendor = gas.BitWidth;
151 *class = gas.BitOffset;
152 *address = gas.Address;
153 *accsize = gas.AccessWidth;
154 return (0);
155 }
156
157 ACPI_HANDLE
158 acpi_GetReference(ACPI_HANDLE scope, ACPI_OBJECT *obj)
159 {
160 ACPI_HANDLE h;
161
162 if (obj == NULL)
163 return (NULL);
164
165 switch (obj->Type) {
166 case ACPI_TYPE_LOCAL_REFERENCE:
167 case ACPI_TYPE_ANY:
168 h = obj->Reference.Handle;
169 break;
170 case ACPI_TYPE_STRING:
171 /*
172 * The String object usually contains a fully-qualified path, so
173 * scope can be NULL.
174 *
175 * XXX This may not always be the case.
176 */
177 if (ACPI_FAILURE(AcpiGetHandle(scope, obj->String.Pointer, &h)))
178 h = NULL;
179 break;
180 default:
181 h = NULL;
182 break;
183 }
184
185 return (h);
186 }
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