/******************************************************************************* * * Module Name: rslist - Linked list utilities * $Revision: 1.47 $ * ******************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2005, Intel Corp. * All rights reserved. * * 2. License * * 2.1. This is your license from Intel Corp. under its intellectual property * rights. You may have additional license terms from the party that provided * you this software, covering your right to use that party's intellectual * property rights. * * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a * copy of the source code appearing in this file ("Covered Code") an * irrevocable, perpetual, worldwide license under Intel's copyrights in the * base code distributed originally by Intel ("Original Intel Code") to copy, * make derivatives, distribute, use and display any portion of the Covered * Code in any form, with the right to sublicense such rights; and * * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent * license (with the right to sublicense), under only those claims of Intel * patents that are infringed by the Original Intel Code, to make, use, sell, * offer to sell, and import the Covered Code and derivative works thereof * solely to the minimum extent necessary to exercise the above copyright * license, and in no event shall the patent license extend to any additions * to or modifications of the Original Intel Code. No other license or right * is granted directly or by implication, estoppel or otherwise; * * The above copyright and patent license is granted only if the following * conditions are met: * * 3. Conditions * * 3.1. Redistribution of Source with Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification with rights to further distribute source must include * the above Copyright Notice, the above License, this list of Conditions, * and the following Disclaimer and Export Compliance provision. In addition, * Licensee must cause all Covered Code to which Licensee contributes to * contain a file documenting the changes Licensee made to create that Covered * Code and the date of any change. Licensee must include in that file the * documentation of any changes made by any predecessor Licensee. Licensee * must include a prominent statement that the modification is derived, * directly or indirectly, from Original Intel Code. * * 3.2. Redistribution of Source with no Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification without rights to further distribute source must * include the following Disclaimer and Export Compliance provision in the * documentation and/or other materials provided with distribution. In * addition, Licensee may not authorize further sublicense of source of any * portion of the Covered Code, and must include terms to the effect that the * license from Licensee to its licensee is limited to the intellectual * property embodied in the software Licensee provides to its licensee, and * not to intellectual property embodied in modifications its licensee may * make. * * 3.3. Redistribution of Executable. Redistribution in executable form of any * substantial portion of the Covered Code or modification must reproduce the * above Copyright Notice, and the following Disclaimer and Export Compliance * provision in the documentation and/or other materials provided with the * distribution. * * 3.4. Intel retains all right, title, and interest in and to the Original * Intel Code. * * 3.5. Neither the name Intel nor any other trademark owned or controlled by * Intel shall be used in advertising or otherwise to promote the sale, use or * other dealings in products derived from or relating to the Covered Code * without prior written authorization from Intel. * * 4. Disclaimer and Export Compliance * * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A * PARTICULAR PURPOSE. * * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY * LIMITED REMEDY. * * 4.3. Licensee shall not export, either directly or indirectly, any of this * software or system incorporating such software without first obtaining any * required license or other approval from the U. S. Department of Commerce or * any other agency or department of the United States Government. In the * event Licensee exports any such software from the United States or * re-exports any such software from a foreign destination, Licensee shall * ensure that the distribution and export/re-export of the software is in * compliance with all laws, regulations, orders, or other restrictions of the * U.S. Export Administration Regulations. Licensee agrees that neither it nor * any of its subsidiaries will export/re-export any technical data, process, * software, or service, directly or indirectly, to any country for which the * United States government or any agency thereof requires an export license, * other governmental approval, or letter of assurance, without first obtaining * such license, approval or letter. * *****************************************************************************/ #define __RSLIST_C__ #include #include #define _COMPONENT ACPI_RESOURCES ACPI_MODULE_NAME ("rslist") /* Local prototypes */ static ACPI_RSCONVERT_INFO * AcpiRsGetConversionInfo ( UINT8 ResourceType); static ACPI_STATUS AcpiRsValidateResourceLength ( AML_RESOURCE *Aml); /******************************************************************************* * * FUNCTION: AcpiRsValidateResourceLength * * PARAMETERS: Aml - Pointer to the AML resource descriptor * * RETURN: Status - AE_OK if the resource length appears valid * * DESCRIPTION: Validate the ResourceLength. Fixed-length descriptors must * have the exact length; variable-length descriptors must be * at least as long as the minimum. Certain Small descriptors * can vary in size by at most one byte. * ******************************************************************************/ static ACPI_STATUS AcpiRsValidateResourceLength ( AML_RESOURCE *Aml) { ACPI_RESOURCE_INFO *ResourceInfo; UINT16 MinimumAmlResourceLength; UINT16 ResourceLength; ACPI_FUNCTION_ENTRY (); /* Get the size and type info about this resource descriptor */ ResourceInfo = AcpiRsGetResourceInfo (Aml->SmallHeader.DescriptorType); if (!ResourceInfo) { return (AE_AML_INVALID_RESOURCE_TYPE); } ResourceLength = AcpiUtGetResourceLength (Aml); MinimumAmlResourceLength = ResourceInfo->MinimumAmlResourceLength; /* Validate based upon the type of resource, fixed length or variable */ if (ResourceInfo->LengthType == ACPI_FIXED_LENGTH) { /* Fixed length resource, length must match exactly */ if (ResourceLength != MinimumAmlResourceLength) { return (AE_AML_BAD_RESOURCE_LENGTH); } } else if (ResourceInfo->LengthType == ACPI_VARIABLE_LENGTH) { /* Variable length resource, must be at least the minimum */ if (ResourceLength < MinimumAmlResourceLength) { return (AE_AML_BAD_RESOURCE_LENGTH); } } else { /* Small variable length resource, allowed to be (Min) or (Min-1) */ if ((ResourceLength > MinimumAmlResourceLength) || (ResourceLength < (MinimumAmlResourceLength - 1))) { return (AE_AML_BAD_RESOURCE_LENGTH); } } return (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiRsGetConversionInfo * * PARAMETERS: ResourceType - Byte 0 of a resource descriptor * * RETURN: Pointer to the resource conversion info table * * DESCRIPTION: Get the conversion table associated with this resource type * ******************************************************************************/ static ACPI_RSCONVERT_INFO * AcpiRsGetConversionInfo ( UINT8 ResourceType) { ACPI_FUNCTION_ENTRY (); /* Determine if this is a small or large resource */ if (ResourceType & ACPI_RESOURCE_NAME_LARGE) { /* Large Resource Type -- bits 6:0 contain the name */ if (ResourceType > ACPI_RESOURCE_NAME_LARGE_MAX) { return (NULL); } return (AcpiGbl_LgGetResourceDispatch [ (ResourceType & ACPI_RESOURCE_NAME_LARGE_MASK)]); } else { /* Small Resource Type -- bits 6:3 contain the name */ return (AcpiGbl_SmGetResourceDispatch [ ((ResourceType & ACPI_RESOURCE_NAME_SMALL_MASK) >> 3)]); } } /******************************************************************************* * * FUNCTION: AcpiRsConvertAmlToResources * * PARAMETERS: AmlBuffer - Pointer to the resource byte stream * AmlBufferLength - Length of AmlBuffer * OutputBuffer - Pointer to the buffer that will * contain the output structures * * RETURN: Status * * DESCRIPTION: Takes the resource byte stream and parses it, creating a * linked list of resources in the caller's output buffer * ******************************************************************************/ ACPI_STATUS AcpiRsConvertAmlToResources ( UINT8 *AmlBuffer, UINT32 AmlBufferLength, UINT8 *OutputBuffer) { UINT8 *Buffer = OutputBuffer; ACPI_STATUS Status; ACPI_SIZE BytesParsed = 0; ACPI_RESOURCE *Resource; ACPI_RSDESC_SIZE DescriptorLength; ACPI_RSCONVERT_INFO *Info; ACPI_FUNCTION_TRACE ("RsConvertAmlToResources"); /* Loop until end-of-buffer or an EndTag is found */ while (BytesParsed < AmlBufferLength) { /* Get the conversion table associated with this Descriptor Type */ Info = AcpiRsGetConversionInfo (*AmlBuffer); if (!Info) { /* No table indicates an invalid resource type */ return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE); } DescriptorLength = AcpiUtGetDescriptorLength (AmlBuffer); /* * Perform limited validation of the resource length, based upon * what we know about the resource type */ Status = AcpiRsValidateResourceLength ( ACPI_CAST_PTR (AML_RESOURCE, AmlBuffer)); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Convert the AML byte stream resource to a local resource struct */ Status = AcpiRsConvertAmlToResource ( ACPI_CAST_PTR (ACPI_RESOURCE, Buffer), ACPI_CAST_PTR (AML_RESOURCE, AmlBuffer), Info); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (( "Could not convert AML resource (type %X) to resource, %s\n", *AmlBuffer, AcpiFormatException (Status))); return_ACPI_STATUS (Status); } /* Set the aligned length of the new resource descriptor */ Resource = ACPI_CAST_PTR (ACPI_RESOURCE, Buffer); Resource->Length = (UINT32) ACPI_ALIGN_RESOURCE_SIZE (Resource->Length); /* Normal exit on completion of an EndTag resource descriptor */ if (AcpiUtGetResourceType (AmlBuffer) == ACPI_RESOURCE_NAME_END_TAG) { return_ACPI_STATUS (AE_OK); } /* Update counter and point to the next input resource */ BytesParsed += DescriptorLength; AmlBuffer += DescriptorLength; /* Point to the next structure in the output buffer */ Buffer += Resource->Length; } /* Completed buffer, but did not find an EndTag resource descriptor */ return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); } /******************************************************************************* * * FUNCTION: AcpiRsConvertResourcesToAml * * PARAMETERS: Resource - Pointer to the resource linked list * AmlSizeNeeded - Calculated size of the byte stream * needed from calling AcpiRsGetAmlLength() * The size of the OutputBuffer is * guaranteed to be >= AmlSizeNeeded * OutputBuffer - 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 AcpiRsConvertResourcesToAml ( ACPI_RESOURCE *Resource, ACPI_SIZE AmlSizeNeeded, UINT8 *OutputBuffer) { UINT8 *AmlBuffer = OutputBuffer; UINT8 *EndAmlBuffer = OutputBuffer + AmlSizeNeeded; ACPI_STATUS Status; ACPI_FUNCTION_TRACE ("RsConvertResourcesToAml"); /* Walk the resource descriptor list, convert each descriptor */ while (AmlBuffer < EndAmlBuffer) { /* Validate the Resource Type */ if (Resource->Type > ACPI_RESOURCE_TYPE_MAX) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid descriptor type (%X) in resource list\n", Resource->Type)); return_ACPI_STATUS (AE_BAD_DATA); } /* Perform the conversion */ Status = AcpiRsConvertResourceToAml (Resource, ACPI_CAST_PTR (AML_RESOURCE, AmlBuffer), AcpiGbl_SetResourceDispatch[Resource->Type]); if (ACPI_FAILURE (Status)) { ACPI_REPORT_ERROR (("Could not convert resource (type %X) to AML, %s\n", Resource->Type, AcpiFormatException (Status))); return_ACPI_STATUS (Status); } /* Perform final sanity check on the new AML resource descriptor */ Status = AcpiRsValidateResourceLength ( ACPI_CAST_PTR (AML_RESOURCE, AmlBuffer)); 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 * AmlBuffer to point to the next (output) resource descriptor */ AmlBuffer += AcpiUtGetDescriptorLength (AmlBuffer); /* Point to the next input resource descriptor */ Resource = ACPI_PTR_ADD (ACPI_RESOURCE, Resource, Resource->Length); /* Check for end-of-list, normal exit */ } /* Completed buffer, but did not find an EndTag resource descriptor */ return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); }