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1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: rslist - Linked list utilities | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
1da177e4 LT |
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 | ||
1da177e4 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/acresrc.h> | |
46 | ||
47 | #define _COMPONENT ACPI_RESOURCES | |
4be44fcd | 48 | ACPI_MODULE_NAME("rslist") |
1da177e4 | 49 | |
1da177e4 LT |
50 | /******************************************************************************* |
51 | * | |
50eca3eb | 52 | * FUNCTION: acpi_rs_convert_aml_to_resources |
1da177e4 | 53 | * |
96db255c BM |
54 | * PARAMETERS: Aml - Pointer to the resource byte stream |
55 | * aml_length - Length of Aml | |
50eca3eb BM |
56 | * output_buffer - Pointer to the buffer that will |
57 | * contain the output structures | |
1da177e4 LT |
58 | * |
59 | * RETURN: Status | |
60 | * | |
61 | * DESCRIPTION: Takes the resource byte stream and parses it, creating a | |
62 | * linked list of resources in the caller's output buffer | |
63 | * | |
64 | ******************************************************************************/ | |
1da177e4 | 65 | acpi_status |
96db255c | 66 | acpi_rs_convert_aml_to_resources(u8 * aml, u32 aml_length, u8 * output_buffer) |
1da177e4 | 67 | { |
96db255c | 68 | struct acpi_resource *resource = (void *)output_buffer; |
4be44fcd | 69 | acpi_status status; |
96db255c BM |
70 | u8 resource_index; |
71 | u8 *end_aml; | |
4be44fcd | 72 | |
50eca3eb | 73 | ACPI_FUNCTION_TRACE("rs_convert_aml_to_resources"); |
4be44fcd | 74 | |
96db255c | 75 | end_aml = aml + aml_length; |
bda663d3 | 76 | |
96db255c | 77 | /* Loop until end-of-buffer or an end_tag is found */ |
bda663d3 | 78 | |
96db255c | 79 | while (aml < end_aml) { |
ea936b78 BM |
80 | /* |
81 | * Check that the input buffer and all subsequent pointers into it | |
82 | * are aligned on a native word boundary. Most important on IA64 | |
83 | */ | |
84 | if (ACPI_IS_MISALIGNED(resource)) { | |
85 | ACPI_WARNING((AE_INFO, | |
86 | "Misaligned resource pointer %p", | |
87 | resource)); | |
88 | } | |
52fc0b02 | 89 | |
96db255c | 90 | /* Validate the Resource Type and Resource Length */ |
50eca3eb | 91 | |
96db255c | 92 | status = acpi_ut_validate_resource(aml, &resource_index); |
50eca3eb BM |
93 | if (ACPI_FAILURE(status)) { |
94 | return_ACPI_STATUS(status); | |
1da177e4 LT |
95 | } |
96 | ||
0897831b | 97 | /* Convert the AML byte stream resource to a local resource struct */ |
50eca3eb | 98 | |
0897831b | 99 | status = |
96db255c | 100 | acpi_rs_convert_aml_to_resource(resource, |
0897831b BM |
101 | ACPI_CAST_PTR(union |
102 | aml_resource, | |
96db255c BM |
103 | aml), |
104 | acpi_gbl_get_resource_dispatch | |
105 | [resource_index]); | |
4be44fcd | 106 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
107 | ACPI_EXCEPTION((AE_INFO, status, |
108 | "Could not convert AML resource (Type %X)", | |
109 | *aml)); | |
4be44fcd | 110 | return_ACPI_STATUS(status); |
1da177e4 LT |
111 | } |
112 | ||
ea936b78 BM |
113 | ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, |
114 | "Type %.2X, Aml %.2X internal %.2X\n", | |
115 | acpi_ut_get_resource_type(aml), | |
116 | acpi_ut_get_descriptor_length(aml), | |
117 | resource->length)); | |
118 | ||
bda663d3 | 119 | /* Normal exit on completion of an end_tag resource descriptor */ |
44f6c012 | 120 | |
96db255c | 121 | if (acpi_ut_get_resource_type(aml) == |
50eca3eb | 122 | ACPI_RESOURCE_NAME_END_TAG) { |
bda663d3 RM |
123 | return_ACPI_STATUS(AE_OK); |
124 | } | |
125 | ||
96db255c | 126 | /* Point to the next input AML resource */ |
bda663d3 | 127 | |
96db255c | 128 | aml += acpi_ut_get_descriptor_length(aml); |
1da177e4 | 129 | |
bda663d3 | 130 | /* Point to the next structure in the output buffer */ |
44f6c012 | 131 | |
96db255c | 132 | resource = |
c51a4de8 | 133 | ACPI_ADD_PTR(struct acpi_resource, resource, |
96db255c | 134 | resource->length); |
44f6c012 | 135 | } |
1da177e4 | 136 | |
96db255c | 137 | /* Did not find an end_tag resource descriptor */ |
1da177e4 | 138 | |
bda663d3 | 139 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); |
1da177e4 LT |
140 | } |
141 | ||
1da177e4 LT |
142 | /******************************************************************************* |
143 | * | |
50eca3eb | 144 | * FUNCTION: acpi_rs_convert_resources_to_aml |
1da177e4 | 145 | * |
50eca3eb BM |
146 | * PARAMETERS: Resource - Pointer to the resource linked list |
147 | * aml_size_needed - Calculated size of the byte stream | |
148 | * needed from calling acpi_rs_get_aml_length() | |
149 | * The size of the output_buffer is | |
150 | * guaranteed to be >= aml_size_needed | |
151 | * output_buffer - Pointer to the buffer that will | |
152 | * contain the byte stream | |
1da177e4 LT |
153 | * |
154 | * RETURN: Status | |
155 | * | |
156 | * DESCRIPTION: Takes the resource linked list and parses it, creating a | |
157 | * byte stream of resources in the caller's output buffer | |
158 | * | |
159 | ******************************************************************************/ | |
160 | ||
161 | acpi_status | |
50eca3eb BM |
162 | acpi_rs_convert_resources_to_aml(struct acpi_resource *resource, |
163 | acpi_size aml_size_needed, u8 * output_buffer) | |
1da177e4 | 164 | { |
96db255c BM |
165 | u8 *aml = output_buffer; |
166 | u8 *end_aml = output_buffer + aml_size_needed; | |
bda663d3 | 167 | acpi_status status; |
1da177e4 | 168 | |
50eca3eb | 169 | ACPI_FUNCTION_TRACE("rs_convert_resources_to_aml"); |
1da177e4 | 170 | |
0897831b | 171 | /* Walk the resource descriptor list, convert each descriptor */ |
1da177e4 | 172 | |
96db255c | 173 | while (aml < end_aml) { |
52fc0b02 | 174 | |
96db255c | 175 | /* Validate the (internal) Resource Type */ |
44f6c012 | 176 | |
50eca3eb | 177 | if (resource->type > ACPI_RESOURCE_TYPE_MAX) { |
b8e4d893 BM |
178 | ACPI_ERROR((AE_INFO, |
179 | "Invalid descriptor type (%X) in resource list", | |
180 | resource->type)); | |
bda663d3 | 181 | return_ACPI_STATUS(AE_BAD_DATA); |
44f6c012 | 182 | } |
1da177e4 | 183 | |
0897831b | 184 | /* Perform the conversion */ |
50eca3eb | 185 | |
0897831b BM |
186 | status = acpi_rs_convert_resource_to_aml(resource, |
187 | ACPI_CAST_PTR(union | |
188 | aml_resource, | |
96db255c | 189 | aml), |
0897831b BM |
190 | acpi_gbl_set_resource_dispatch |
191 | [resource->type]); | |
50eca3eb | 192 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
193 | ACPI_EXCEPTION((AE_INFO, status, |
194 | "Could not convert resource (type %X) to AML", | |
195 | resource->type)); | |
50eca3eb BM |
196 | return_ACPI_STATUS(status); |
197 | } | |
198 | ||
199 | /* Perform final sanity check on the new AML resource descriptor */ | |
bda663d3 | 200 | |
50eca3eb | 201 | status = |
96db255c BM |
202 | acpi_ut_validate_resource(ACPI_CAST_PTR |
203 | (union aml_resource, aml), NULL); | |
4be44fcd LB |
204 | if (ACPI_FAILURE(status)) { |
205 | return_ACPI_STATUS(status); | |
1da177e4 LT |
206 | } |
207 | ||
50eca3eb | 208 | /* Check for end-of-list, normal exit */ |
bda663d3 | 209 | |
50eca3eb | 210 | if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) { |
52fc0b02 | 211 | |
50eca3eb | 212 | /* An End Tag indicates the end of the input Resource Template */ |
bda663d3 RM |
213 | |
214 | return_ACPI_STATUS(AE_OK); | |
215 | } | |
216 | ||
0897831b BM |
217 | /* |
218 | * Extract the total length of the new descriptor and set the | |
96db255c | 219 | * Aml to point to the next (output) resource descriptor |
0897831b | 220 | */ |
96db255c | 221 | aml += acpi_ut_get_descriptor_length(aml); |
1da177e4 | 222 | |
50eca3eb | 223 | /* Point to the next input resource descriptor */ |
44f6c012 | 224 | |
50eca3eb | 225 | resource = |
c51a4de8 | 226 | ACPI_ADD_PTR(struct acpi_resource, resource, |
50eca3eb | 227 | resource->length); |
1da177e4 | 228 | } |
0897831b BM |
229 | |
230 | /* Completed buffer, but did not find an end_tag resource descriptor */ | |
231 | ||
232 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); | |
1da177e4 | 233 | } |