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215 lines
7.0 KiB
215 lines
7.0 KiB
/*******************************************************************************
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*
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* Module Name: rslist - Linked list utilities
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2006, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acresrc.h>
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#define _COMPONENT ACPI_RESOURCES
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ACPI_MODULE_NAME("rslist")
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_convert_aml_to_resources
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*
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* PARAMETERS: Aml - Pointer to the resource byte stream
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* aml_length - Length of Aml
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* output_buffer - Pointer to the buffer that will
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* contain the output structures
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*
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* RETURN: Status
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*
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* DESCRIPTION: Takes the resource byte stream and parses it, creating a
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* linked list of resources in the caller's output buffer
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*
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******************************************************************************/
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acpi_status
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acpi_rs_convert_aml_to_resources(u8 * aml, u32 aml_length, u8 * output_buffer)
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{
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struct acpi_resource *resource = (void *)output_buffer;
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acpi_status status;
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u8 resource_index;
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u8 *end_aml;
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ACPI_FUNCTION_TRACE("rs_convert_aml_to_resources");
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end_aml = aml + aml_length;
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/* Loop until end-of-buffer or an end_tag is found */
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while (aml < end_aml) {
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/* Validate the Resource Type and Resource Length */
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status = acpi_ut_validate_resource(aml, &resource_index);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Convert the AML byte stream resource to a local resource struct */
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status =
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acpi_rs_convert_aml_to_resource(resource,
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ACPI_CAST_PTR(union
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aml_resource,
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aml),
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acpi_gbl_get_resource_dispatch
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[resource_index]);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"Could not convert AML resource (Type %X)",
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*aml));
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return_ACPI_STATUS(status);
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}
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/* Normal exit on completion of an end_tag resource descriptor */
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if (acpi_ut_get_resource_type(aml) ==
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ACPI_RESOURCE_NAME_END_TAG) {
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return_ACPI_STATUS(AE_OK);
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}
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/* Point to the next input AML resource */
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aml += acpi_ut_get_descriptor_length(aml);
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/* Point to the next structure in the output buffer */
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resource =
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ACPI_ADD_PTR(struct acpi_resource, resource,
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resource->length);
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}
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/* Did not find an end_tag resource descriptor */
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return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_rs_convert_resources_to_aml
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*
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* PARAMETERS: Resource - Pointer to the resource linked list
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* aml_size_needed - Calculated size of the byte stream
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* needed from calling acpi_rs_get_aml_length()
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* The size of the output_buffer is
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* guaranteed to be >= aml_size_needed
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* output_buffer - Pointer to the buffer that will
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* contain the byte stream
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*
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* RETURN: Status
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*
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* DESCRIPTION: Takes the resource linked list and parses it, creating a
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* byte stream of resources in the caller's output buffer
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*
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******************************************************************************/
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acpi_status
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acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,
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acpi_size aml_size_needed, u8 * output_buffer)
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{
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u8 *aml = output_buffer;
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u8 *end_aml = output_buffer + aml_size_needed;
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acpi_status status;
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ACPI_FUNCTION_TRACE("rs_convert_resources_to_aml");
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/* Walk the resource descriptor list, convert each descriptor */
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while (aml < end_aml) {
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/* Validate the (internal) Resource Type */
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if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
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ACPI_ERROR((AE_INFO,
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"Invalid descriptor type (%X) in resource list",
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resource->type));
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return_ACPI_STATUS(AE_BAD_DATA);
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}
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/* Perform the conversion */
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status = acpi_rs_convert_resource_to_aml(resource,
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ACPI_CAST_PTR(union
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aml_resource,
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aml),
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acpi_gbl_set_resource_dispatch
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[resource->type]);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"Could not convert resource (type %X) to AML",
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resource->type));
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return_ACPI_STATUS(status);
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}
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/* Perform final sanity check on the new AML resource descriptor */
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status =
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acpi_ut_validate_resource(ACPI_CAST_PTR
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(union aml_resource, aml), NULL);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Check for end-of-list, normal exit */
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if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
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/* An End Tag indicates the end of the input Resource Template */
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return_ACPI_STATUS(AE_OK);
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}
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/*
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* Extract the total length of the new descriptor and set the
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* Aml to point to the next (output) resource descriptor
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*/
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aml += acpi_ut_get_descriptor_length(aml);
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/* Point to the next input resource descriptor */
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resource =
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ACPI_ADD_PTR(struct acpi_resource, resource,
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resource->length);
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}
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/* Completed buffer, but did not find an end_tag resource descriptor */
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return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
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}
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