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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 | * |
61686124 BM |
54 | * PARAMETERS: acpi_walk_aml_callback |
55 | * resource_ptr - Pointer to the buffer that will | |
56 | * contain the output structures | |
1da177e4 LT |
57 | * |
58 | * RETURN: Status | |
59 | * | |
61686124 BM |
60 | * DESCRIPTION: Convert an AML resource to an internal representation of the |
61 | * resource that is aligned and easier to access. | |
1da177e4 LT |
62 | * |
63 | ******************************************************************************/ | |
1da177e4 | 64 | acpi_status |
61686124 BM |
65 | acpi_rs_convert_aml_to_resources(u8 * aml, |
66 | u32 length, | |
793c2388 | 67 | u32 offset, u8 resource_index, void **context) |
1da177e4 | 68 | { |
793c2388 BM |
69 | struct acpi_resource **resource_ptr = |
70 | ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context); | |
71 | struct acpi_resource *resource; | |
4be44fcd | 72 | acpi_status status; |
4be44fcd | 73 | |
b229cf92 | 74 | ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources); |
4be44fcd | 75 | |
61686124 BM |
76 | /* |
77 | * Check that the input buffer and all subsequent pointers into it | |
78 | * are aligned on a native word boundary. Most important on IA64 | |
79 | */ | |
793c2388 | 80 | resource = *resource_ptr; |
61686124 BM |
81 | if (ACPI_IS_MISALIGNED(resource)) { |
82 | ACPI_WARNING((AE_INFO, | |
83 | "Misaligned resource pointer %p", resource)); | |
84 | } | |
44f6c012 | 85 | |
61686124 BM |
86 | /* Convert the AML byte stream resource to a local resource struct */ |
87 | ||
88 | status = | |
89 | acpi_rs_convert_aml_to_resource(resource, | |
90 | ACPI_CAST_PTR(union aml_resource, | |
91 | aml), | |
92 | acpi_gbl_get_resource_dispatch | |
93 | [resource_index]); | |
94 | if (ACPI_FAILURE(status)) { | |
95 | ACPI_EXCEPTION((AE_INFO, status, | |
96 | "Could not convert AML resource (Type %X)", | |
97 | *aml)); | |
98 | return_ACPI_STATUS(status); | |
44f6c012 | 99 | } |
1da177e4 | 100 | |
61686124 | 101 | ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, |
b229cf92 | 102 | "Type %.2X, AmlLength %.2X InternalLength %.2X\n", |
61686124 BM |
103 | acpi_ut_get_resource_type(aml), length, |
104 | resource->length)); | |
105 | ||
106 | /* Point to the next structure in the output buffer */ | |
1da177e4 | 107 | |
61686124 BM |
108 | *resource_ptr = ACPI_ADD_PTR(void, resource, resource->length); |
109 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
110 | } |
111 | ||
1da177e4 LT |
112 | /******************************************************************************* |
113 | * | |
50eca3eb | 114 | * FUNCTION: acpi_rs_convert_resources_to_aml |
1da177e4 | 115 | * |
50eca3eb BM |
116 | * PARAMETERS: Resource - Pointer to the resource linked list |
117 | * aml_size_needed - Calculated size of the byte stream | |
118 | * needed from calling acpi_rs_get_aml_length() | |
119 | * The size of the output_buffer is | |
120 | * guaranteed to be >= aml_size_needed | |
121 | * output_buffer - Pointer to the buffer that will | |
122 | * contain the byte stream | |
1da177e4 LT |
123 | * |
124 | * RETURN: Status | |
125 | * | |
126 | * DESCRIPTION: Takes the resource linked list and parses it, creating a | |
127 | * byte stream of resources in the caller's output buffer | |
128 | * | |
129 | ******************************************************************************/ | |
130 | ||
131 | acpi_status | |
50eca3eb BM |
132 | acpi_rs_convert_resources_to_aml(struct acpi_resource *resource, |
133 | acpi_size aml_size_needed, u8 * output_buffer) | |
1da177e4 | 134 | { |
96db255c BM |
135 | u8 *aml = output_buffer; |
136 | u8 *end_aml = output_buffer + aml_size_needed; | |
bda663d3 | 137 | acpi_status status; |
1da177e4 | 138 | |
b229cf92 | 139 | ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml); |
1da177e4 | 140 | |
0897831b | 141 | /* Walk the resource descriptor list, convert each descriptor */ |
1da177e4 | 142 | |
96db255c | 143 | while (aml < end_aml) { |
52fc0b02 | 144 | |
96db255c | 145 | /* Validate the (internal) Resource Type */ |
44f6c012 | 146 | |
50eca3eb | 147 | if (resource->type > ACPI_RESOURCE_TYPE_MAX) { |
b8e4d893 BM |
148 | ACPI_ERROR((AE_INFO, |
149 | "Invalid descriptor type (%X) in resource list", | |
150 | resource->type)); | |
bda663d3 | 151 | return_ACPI_STATUS(AE_BAD_DATA); |
44f6c012 | 152 | } |
1da177e4 | 153 | |
0897831b | 154 | /* Perform the conversion */ |
50eca3eb | 155 | |
0897831b BM |
156 | status = acpi_rs_convert_resource_to_aml(resource, |
157 | ACPI_CAST_PTR(union | |
158 | aml_resource, | |
96db255c | 159 | aml), |
0897831b BM |
160 | acpi_gbl_set_resource_dispatch |
161 | [resource->type]); | |
50eca3eb | 162 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
163 | ACPI_EXCEPTION((AE_INFO, status, |
164 | "Could not convert resource (type %X) to AML", | |
165 | resource->type)); | |
50eca3eb BM |
166 | return_ACPI_STATUS(status); |
167 | } | |
168 | ||
169 | /* Perform final sanity check on the new AML resource descriptor */ | |
bda663d3 | 170 | |
50eca3eb | 171 | status = |
96db255c BM |
172 | acpi_ut_validate_resource(ACPI_CAST_PTR |
173 | (union aml_resource, aml), NULL); | |
4be44fcd LB |
174 | if (ACPI_FAILURE(status)) { |
175 | return_ACPI_STATUS(status); | |
1da177e4 LT |
176 | } |
177 | ||
50eca3eb | 178 | /* Check for end-of-list, normal exit */ |
bda663d3 | 179 | |
50eca3eb | 180 | if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) { |
52fc0b02 | 181 | |
50eca3eb | 182 | /* An End Tag indicates the end of the input Resource Template */ |
bda663d3 RM |
183 | |
184 | return_ACPI_STATUS(AE_OK); | |
185 | } | |
186 | ||
0897831b BM |
187 | /* |
188 | * Extract the total length of the new descriptor and set the | |
96db255c | 189 | * Aml to point to the next (output) resource descriptor |
0897831b | 190 | */ |
96db255c | 191 | aml += acpi_ut_get_descriptor_length(aml); |
1da177e4 | 192 | |
50eca3eb | 193 | /* Point to the next input resource descriptor */ |
44f6c012 | 194 | |
50eca3eb | 195 | resource = |
c51a4de8 | 196 | ACPI_ADD_PTR(struct acpi_resource, resource, |
50eca3eb | 197 | resource->length); |
1da177e4 | 198 | } |
0897831b BM |
199 | |
200 | /* Completed buffer, but did not find an end_tag resource descriptor */ | |
201 | ||
202 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); | |
1da177e4 | 203 | } |