1 /*******************************************************************************
2 *
3 * Module Name: rslist - Linked list utilities
4 *
5 ******************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2011, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #define __RSLIST_C__
45
46 #include "acpi.h"
47 #include "accommon.h"
48 #include "acresrc.h"
49
50 #define _COMPONENT ACPI_RESOURCES
51 ACPI_MODULE_NAME ("rslist")
52
53
54 /*******************************************************************************
55 *
56 * FUNCTION: AcpiRsConvertAmlToResources
57 *
58 * PARAMETERS: ACPI_WALK_AML_CALLBACK
59 * ResourcePtr - Pointer to the buffer that will
60 * contain the output structures
61 *
62 * RETURN: Status
63 *
64 * DESCRIPTION: Convert an AML resource to an internal representation of the
65 * resource that is aligned and easier to access.
66 *
67 ******************************************************************************/
68
69 ACPI_STATUS
70 AcpiRsConvertAmlToResources (
71 UINT8 *Aml,
72 UINT32 Length,
73 UINT32 Offset,
74 UINT8 ResourceIndex,
75 void *Context)
76 {
77 ACPI_RESOURCE **ResourcePtr = ACPI_CAST_INDIRECT_PTR (
78 ACPI_RESOURCE, Context);
79 ACPI_RESOURCE *Resource;
80 ACPI_STATUS Status;
81
82
83 ACPI_FUNCTION_TRACE (RsConvertAmlToResources);
84
85
86 /*
87 * Check that the input buffer and all subsequent pointers into it
88 * are aligned on a native word boundary. Most important on IA64
89 */
90 Resource = *ResourcePtr;
91 if (ACPI_IS_MISALIGNED (Resource))
92 {
93 ACPI_WARNING ((AE_INFO,
94 "Misaligned resource pointer %p", Resource));
95 }
96
97 /* Convert the AML byte stream resource to a local resource struct */
98
99 Status = AcpiRsConvertAmlToResource (
100 Resource, ACPI_CAST_PTR (AML_RESOURCE, Aml),
101 AcpiGbl_GetResourceDispatch[ResourceIndex]);
102 if (ACPI_FAILURE (Status))
103 {
104 ACPI_EXCEPTION ((AE_INFO, Status,
105 "Could not convert AML resource (Type 0x%X)", *Aml));
106 return_ACPI_STATUS (Status);
107 }
108
109 ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES,
110 "Type %.2X, AmlLength %.2X InternalLength %.2X\n",
111 AcpiUtGetResourceType (Aml), Length,
112 Resource->Length));
113
114 /* Point to the next structure in the output buffer */
115
116 *ResourcePtr = ACPI_ADD_PTR (void, Resource, Resource->Length);
117 return_ACPI_STATUS (AE_OK);
118 }
119
120
121 /*******************************************************************************
122 *
123 * FUNCTION: AcpiRsConvertResourcesToAml
124 *
125 * PARAMETERS: Resource - Pointer to the resource linked list
126 * AmlSizeNeeded - Calculated size of the byte stream
127 * needed from calling AcpiRsGetAmlLength()
128 * The size of the OutputBuffer is
129 * guaranteed to be >= AmlSizeNeeded
130 * OutputBuffer - Pointer to the buffer that will
131 * contain the byte stream
132 *
133 * RETURN: Status
134 *
135 * DESCRIPTION: Takes the resource linked list and parses it, creating a
136 * byte stream of resources in the caller's output buffer
137 *
138 ******************************************************************************/
139
140 ACPI_STATUS
141 AcpiRsConvertResourcesToAml (
142 ACPI_RESOURCE *Resource,
143 ACPI_SIZE AmlSizeNeeded,
144 UINT8 *OutputBuffer)
145 {
146 UINT8 *Aml = OutputBuffer;
147 UINT8 *EndAml = OutputBuffer + AmlSizeNeeded;
148 ACPI_STATUS Status;
149
150
151 ACPI_FUNCTION_TRACE (RsConvertResourcesToAml);
152
153
154 /* Walk the resource descriptor list, convert each descriptor */
155
156 while (Aml < EndAml)
157 {
158 /* Validate the (internal) Resource Type */
159
160 if (Resource->Type > ACPI_RESOURCE_TYPE_MAX)
161 {
162 ACPI_ERROR ((AE_INFO,
163 "Invalid descriptor type (0x%X) in resource list",
164 Resource->Type));
165 return_ACPI_STATUS (AE_BAD_DATA);
166 }
167
168 /* Perform the conversion */
169
170 Status = AcpiRsConvertResourceToAml (Resource,
171 ACPI_CAST_PTR (AML_RESOURCE, Aml),
172 AcpiGbl_SetResourceDispatch[Resource->Type]);
173 if (ACPI_FAILURE (Status))
174 {
175 ACPI_EXCEPTION ((AE_INFO, Status,
176 "Could not convert resource (type 0x%X) to AML",
177 Resource->Type));
178 return_ACPI_STATUS (Status);
179 }
180
181 /* Perform final sanity check on the new AML resource descriptor */
182
183 Status = AcpiUtValidateResource (
184 ACPI_CAST_PTR (AML_RESOURCE, Aml), NULL);
185 if (ACPI_FAILURE (Status))
186 {
187 return_ACPI_STATUS (Status);
188 }
189
190 /* Check for end-of-list, normal exit */
191
192 if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG)
193 {
194 /* An End Tag indicates the end of the input Resource Template */
195
196 return_ACPI_STATUS (AE_OK);
197 }
198
199 /*
200 * Extract the total length of the new descriptor and set the
201 * Aml to point to the next (output) resource descriptor
202 */
203 Aml += AcpiUtGetDescriptorLength (Aml);
204
205 /* Point to the next input resource descriptor */
206
207 Resource = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, Resource->Length);
208 }
209
210 /* Completed buffer, but did not find an EndTag resource descriptor */
211
212 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
213 }
214