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| 1 | /******************************************************************************* | |||
| 2 | * | |||
| 3 | * Module Name: rslist - Linked list utilities | |||
| 4 | * | |||
| 5 | ******************************************************************************/ | |||
| 6 | ||||
| 7 | /* | |||
| 8 | * Copyright (C) 2000 - 2006, R. Byron Moore | |||
| 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 | #include <acpi/acpi.h> | |||
| 45 | #include <acpi/acresrc.h> | |||
| 46 | ||||
| 47 | #define _COMPONENT ACPI_RESOURCES | |||
| 48 | ACPI_MODULE_NAME("rslist") | |||
| 49 | ||||
| 50 | /******************************************************************************* | |||
| 51 | * | |||
| 52 | * FUNCTION: acpi_rs_convert_aml_to_resources | |||
| 53 | * | |||
| 54 | * PARAMETERS: Aml - Pointer to the resource byte stream | |||
| 55 | * aml_length - Length of Aml | |||
| 56 | * output_buffer - Pointer to the buffer that will | |||
| 57 | * contain the output structures | |||
| 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 | ******************************************************************************/ | |||
| 65 | acpi_status | |||
| 120 | 0 | 66 | acpi_rs_convert_aml_to_resources(u8 * aml, u32 aml_length, u8 * output_buffer) | |
| 67 | { | |||
| 68 | struct acpi_resource *resource = (void *)output_buffer; | |||
| 69 | acpi_status status; | |||
| 70 | u8 resource_index; | |||
| 71 | u8 *end_aml; | |||
| 72 | ||||
| 73 | ACPI_FUNCTION_TRACE("rs_convert_aml_to_resources"); | |||
| 74 | ||||
| 75 | end_aml = aml + aml_length; | |||
| 76 | ||||
| 77 | /* Loop until end-of-buffer or an end_tag is found */ | |||
| 78 | ||||
| 426 | 0 | - | 79 | while (aml < end_aml) { |
| 80 | /* Validate the Resource Type and Resource Length */ | |||
| 81 | ||||
| 82 | status = acpi_ut_validate_resource(aml, &resource_index); | |||
| 0 | 426 | - | 83 | if (ACPI_FAILURE(status)) { |
| 0 | - | 84 | return_ACPI_STATUS(status); | |
| 85 | } | |||
| 86 | ||||
| 87 | /* Convert the AML byte stream resource to a local resource struct */ | |||
| 88 | ||||
| 89 | status = | |||
| 90 | acpi_rs_convert_aml_to_resource(resource, | |||
| 91 | ACPI_CAST_PTR(union | |||
| 92 | aml_resource, | |||
| 93 | aml), | |||
| 94 | acpi_gbl_get_resource_dispatch | |||
| 95 | [resource_index]); | |||
| 0 | 426 | - | 96 | if (ACPI_FAILURE(status)) { |
| 97 | ACPI_EXCEPTION((AE_INFO, status, | |||
| 98 | "Could not convert AML resource (Type %X)", | |||
| 99 | *aml)); | |||
| 0 | - | 100 | return_ACPI_STATUS(status); | |
| 101 | } | |||
| 102 | ||||
| 103 | /* Normal exit on completion of an end_tag resource descriptor */ | |||
| 104 | ||||
| 105 | if (acpi_ut_get_resource_type(aml) == | |||
| 120 | 306 | 106 | ACPI_RESOURCE_NAME_END_TAG) { | |
| 120 | 107 | return_ACPI_STATUS(AE_OK); | ||
| 108 | } | |||
| 109 | ||||
| 110 | /* Point to the next input AML resource */ | |||
| 111 | ||||
| 112 | aml += acpi_ut_get_descriptor_length(aml); | |||
| 113 | ||||
| 114 | /* Point to the next structure in the output buffer */ | |||
| 115 | ||||
| 116 | resource = | |||
| 117 | ACPI_ADD_PTR(struct acpi_resource, resource, | |||
| 118 | resource->length); | |||
| 119 | } | |||
| 120 | ||||
| 121 | /* Did not find an end_tag resource descriptor */ | |||
| 122 | ||||
| 0 | - | 123 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); | |
| 124 | } | |||
| 125 | ||||
| 126 | /******************************************************************************* | |||
| 127 | * | |||
| 128 | * FUNCTION: acpi_rs_convert_resources_to_aml | |||
| 129 | * | |||
| 130 | * PARAMETERS: Resource - Pointer to the resource linked list | |||
| 131 | * aml_size_needed - Calculated size of the byte stream | |||
| 132 | * needed from calling acpi_rs_get_aml_length() | |||
| 133 | * The size of the output_buffer is | |||
| 134 | * guaranteed to be >= aml_size_needed | |||
| 135 | * output_buffer - Pointer to the buffer that will | |||
| 136 | * contain the byte stream | |||
| 137 | * | |||
| 138 | * RETURN: Status | |||
| 139 | * | |||
| 140 | * DESCRIPTION: Takes the resource linked list and parses it, creating a | |||
| 141 | * byte stream of resources in the caller's output buffer | |||
| 142 | * | |||
| 143 | ******************************************************************************/ | |||
| 144 | ||||
| 145 | acpi_status | |||
| 0 | 0 | - | 146 | acpi_rs_convert_resources_to_aml(struct acpi_resource *resource, |
| 147 | acpi_size aml_size_needed, u8 * output_buffer) | |||
| 148 | { | |||
| 149 | u8 *aml = output_buffer; | |||
| 150 | u8 *end_aml = output_buffer + aml_size_needed; | |||
| 151 | acpi_status status; | |||
| 152 | ||||
| 153 | ACPI_FUNCTION_TRACE("rs_convert_resources_to_aml"); | |||
| 154 | ||||
| 155 | /* Walk the resource descriptor list, convert each descriptor */ | |||
| 156 | ||||
| 0 | 0 | - | 157 | while (aml < end_aml) { |
| 158 | /* Validate the (internal) Resource Type */ | |||
| 159 | ||||
| 0 | 0 | - | 160 | if (resource->type > ACPI_RESOURCE_TYPE_MAX) { |
| 161 | ACPI_ERROR((AE_INFO, | |||
| 162 | "Invalid descriptor type (%X) in resource list", | |||
| 163 | resource->type)); | |||
| 0 | - | 164 | return_ACPI_STATUS(AE_BAD_DATA); | |
| 165 | } | |||
| 166 | ||||
| 167 | /* Perform the conversion */ | |||
| 168 | ||||
| 169 | status = acpi_rs_convert_resource_to_aml(resource, | |||
| 170 | ACPI_CAST_PTR(union | |||
| 171 | aml_resource, | |||
| 172 | aml), | |||
| 173 | acpi_gbl_set_resource_dispatch | |||
| 174 | [resource->type]); | |||
| 0 | 0 | - | 175 | if (ACPI_FAILURE(status)) { |
| 176 | ACPI_EXCEPTION((AE_INFO, status, | |||
| 177 | "Could not convert resource (type %X) to AML", | |||
| 178 | resource->type)); | |||
| 0 | - | 179 | return_ACPI_STATUS(status); | |
| 180 | } | |||
| 181 | ||||
| 182 | /* Perform final sanity check on the new AML resource descriptor */ | |||
| 183 | ||||
| 184 | status = | |||
| 185 | acpi_ut_validate_resource(ACPI_CAST_PTR | |||
| 186 | (union aml_resource, aml), NULL); | |||
| 0 | 0 | - | 187 | if (ACPI_FAILURE(status)) { |
| 0 | - | 188 | return_ACPI_STATUS(status); | |
| 189 | } | |||
| 190 | ||||
| 191 | /* Check for end-of-list, normal exit */ | |||
| 192 | ||||
| 0 | 0 | - | 193 | if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) { |
| 194 | /* An End Tag indicates the end of the input Resource Template */ | |||
| 195 | ||||
| 0 | - | 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 += acpi_ut_get_descriptor_length(aml); | |||
| 204 | ||||
| 205 | /* Point to the next input resource descriptor */ | |||
| 206 | ||||
| 207 | resource = | |||
| 208 | ACPI_ADD_PTR(struct acpi_resource, resource, | |||
| 209 | resource->length); | |||
| 210 | } | |||
| 211 | ||||
| 212 | /* Completed buffer, but did not find an end_tag resource descriptor */ | |||
| 213 | ||||
| 0 | - | 214 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); | |
| 215 | } | |||
| ***TER 24% (7/29) of SOURCE FILE rslist.c | ||||