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/*******************************************************************************

 *

 * Module Name: rslist - Linked list utilities

 *

 ******************************************************************************/

/*

 * Copyright (C) 2000 - 2007, R. Byron Moore

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions, and the following disclaimer,

 *    without modification.

 * 2. Redistributions in binary form must reproduce at minimum a disclaimer

 *    substantially similar to the "NO WARRANTY" disclaimer below

 *    ("Disclaimer") and any redistribution must be conditioned upon

 *    including a substantially similar Disclaimer requirement for further

 *    binary redistribution.

 * 3. Neither the names of the above-listed copyright holders nor the names

 *    of any contributors may be used to endorse or promote products derived

 *    from this software without specific prior written permission.

 *

 * Alternatively, this software may be distributed under the terms of the

 * GNU General Public License ("GPL") version 2 as published by the Free

 * Software Foundation.

 *

 * NO WARRANTY

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGES.

 */

#include <acpi/acpi.h>

#include <acpi/acresrc.h>

#define _COMPONENT          ACPI_RESOURCES

ACPI_MODULE_NAME("rslist")

/*******************************************************************************

 *

 * FUNCTION:    acpi_rs_convert_aml_to_resources

 *

 * PARAMETERS:  acpi_walk_aml_callback

 *              resource_ptr            - Pointer to the buffer that will

 *                                        contain the output structures

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Convert an AML resource to an internal representation of the

 *              resource that is aligned and easier to access.

 *

 ******************************************************************************/

acpi_status

acpi_rs_convert_aml_to_resources(u8 * aml,

                                 u32 length,

                                 u32 offset, u8 resource_index, void **context)

{

        struct acpi_resource **resource_ptr =

            ACPI_CAST_INDIRECT_PTR(struct acpi_resource, context);

        struct acpi_resource *resource;

        acpi_status status;

        ACPI_FUNCTION_TRACE(rs_convert_aml_to_resources);

        /*

         * Check that the input buffer and all subsequent pointers into it

         * are aligned on a native word boundary. Most important on IA64

         */

        resource = *resource_ptr;

        if (ACPI_IS_MISALIGNED(resource)) {

                ACPI_WARNING((AE_INFO,

                              "Misaligned resource pointer %p", resource));

        }

        /* Convert the AML byte stream resource to a local resource struct */

        status =

            acpi_rs_convert_aml_to_resource(resource,

                                            ACPI_CAST_PTR(union aml_resource,

                                                          aml),

                                            acpi_gbl_get_resource_dispatch

                                            [resource_index]);

        if (ACPI_FAILURE(status)) {

                ACPI_EXCEPTION((AE_INFO, status,

                                "Could not convert AML resource (Type %X)",

                                *aml));

                return_ACPI_STATUS(status);

        }

        ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES,

                          "Type %.2X, AmlLength %.2X InternalLength %.2X\n",

                          acpi_ut_get_resource_type(aml), length,

                          resource->length));

        /* Point to the next structure in the output buffer */

        *resource_ptr = ACPI_ADD_PTR(void, resource, resource->length);

        return_ACPI_STATUS(AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_rs_convert_resources_to_aml

 *

 * PARAMETERS:  Resource            - Pointer to the resource linked list

 *              aml_size_needed     - Calculated size of the byte stream

 *                                    needed from calling acpi_rs_get_aml_length()

 *                                    The size of the output_buffer is

 *                                    guaranteed to be >= aml_size_needed

 *              output_buffer       - Pointer to the buffer that will

 *                                    contain the byte stream

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Takes the resource linked list and parses it, creating a

 *              byte stream of resources in the caller's output buffer

 *

 ******************************************************************************/

acpi_status

acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,

                                 acpi_size aml_size_needed, u8 * output_buffer)

{

        u8 *aml = output_buffer;

        u8 *end_aml = output_buffer + aml_size_needed;

        acpi_status status;

        ACPI_FUNCTION_TRACE(rs_convert_resources_to_aml);

        /* Walk the resource descriptor list, convert each descriptor */

        while (aml < end_aml) {

                /* Validate the (internal) Resource Type */

                if (resource->type > ACPI_RESOURCE_TYPE_MAX) {

                        ACPI_ERROR((AE_INFO,

                                    "Invalid descriptor type (%X) in resource list",

                                    resource->type));

                        return_ACPI_STATUS(AE_BAD_DATA);

                }

                /* Perform the conversion */

                status = acpi_rs_convert_resource_to_aml(resource, ACPI_CAST_PTR(union

                                                                                 aml_resource,

                                                                                 aml),

                                                         acpi_gbl_set_resource_dispatch

                                                         [resource->type]);

                if (ACPI_FAILURE(status)) {

                        ACPI_EXCEPTION((AE_INFO, status,

                                        "Could not convert resource (type %X) to AML",

                                        resource->type));

                        return_ACPI_STATUS(status);

                }

                /* Perform final sanity check on the new AML resource descriptor */

                status =

                    acpi_ut_validate_resource(ACPI_CAST_PTR

                                              (union aml_resource, aml), NULL);

                if (ACPI_FAILURE(status)) {

                        return_ACPI_STATUS(status);

                }

                /* Check for end-of-list, normal exit */

                if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {

                        /* An End Tag indicates the end of the input Resource Template */

                        return_ACPI_STATUS(AE_OK);

                }

                /*

                 * Extract the total length of the new descriptor and set the

                 * Aml to point to the next (output) resource descriptor

                 */

                aml += acpi_ut_get_descriptor_length(aml);

                /* Point to the next input resource descriptor */

                resource =

                    ACPI_ADD_PTR(struct acpi_resource, resource,

                                 resource->length);

        }

        /* Completed buffer, but did not find an end_tag resource descriptor */

        return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);

}