/******************************************************************************* * * Module Name: rscalc - Calculate stream and list lengths * ******************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2021, 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. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * 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. * * 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 MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * 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 DAMAGE. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #include "acpi.h" #include "accommon.h" #include "acresrc.h" #include "acnamesp.h" #define _COMPONENT ACPI_RESOURCES ACPI_MODULE_NAME ("rscalc") /* Local prototypes */ static UINT8 AcpiRsCountSetBits ( UINT16 BitField); static ACPI_RS_LENGTH AcpiRsStructOptionLength ( ACPI_RESOURCE_SOURCE *ResourceSource); static UINT32 AcpiRsStreamOptionLength ( UINT32 ResourceLength, UINT32 MinimumTotalLength); /******************************************************************************* * * FUNCTION: AcpiRsCountSetBits * * PARAMETERS: BitField - Field in which to count bits * * RETURN: Number of bits set within the field * * DESCRIPTION: Count the number of bits set in a resource field. Used for * (Short descriptor) interrupt and DMA lists. * ******************************************************************************/ static UINT8 AcpiRsCountSetBits ( UINT16 BitField) { UINT8 BitsSet; ACPI_FUNCTION_ENTRY (); for (BitsSet = 0; BitField; BitsSet++) { /* Zero the least significant bit that is set */ BitField &= (UINT16) (BitField - 1); } return (BitsSet); } /******************************************************************************* * * FUNCTION: AcpiRsStructOptionLength * * PARAMETERS: ResourceSource - Pointer to optional descriptor field * * RETURN: Status * * DESCRIPTION: Common code to handle optional ResourceSourceIndex and * ResourceSource fields in some Large descriptors. Used during * list-to-stream conversion * ******************************************************************************/ static ACPI_RS_LENGTH AcpiRsStructOptionLength ( ACPI_RESOURCE_SOURCE *ResourceSource) { ACPI_FUNCTION_ENTRY (); /* * If the ResourceSource string is valid, return the size of the string * (StringLength includes the NULL terminator) plus the size of the * ResourceSourceIndex (1). */ if (ResourceSource->StringPtr) { return ((ACPI_RS_LENGTH) (ResourceSource->StringLength + 1)); } return (0); } /******************************************************************************* * * FUNCTION: AcpiRsStreamOptionLength * * PARAMETERS: ResourceLength - Length from the resource header * MinimumTotalLength - Minimum length of this resource, before * any optional fields. Includes header size * * RETURN: Length of optional string (0 if no string present) * * DESCRIPTION: Common code to handle optional ResourceSourceIndex and * ResourceSource fields in some Large descriptors. Used during * stream-to-list conversion * ******************************************************************************/ static UINT32 AcpiRsStreamOptionLength ( UINT32 ResourceLength, UINT32 MinimumAmlResourceLength) { UINT32 StringLength = 0; ACPI_FUNCTION_ENTRY (); /* * The ResourceSourceIndex and ResourceSource are optional elements of * some Large-type resource descriptors. */ /* * If the length of the actual resource descriptor is greater than the * ACPI spec-defined minimum length, it means that a ResourceSourceIndex * exists and is followed by a (required) null terminated string. The * string length (including the null terminator) is the resource length * minus the minimum length, minus one byte for the ResourceSourceIndex * itself. */ if (ResourceLength > MinimumAmlResourceLength) { /* Compute the length of the optional string */ StringLength = ResourceLength - MinimumAmlResourceLength - 1; } /* * Round the length up to a multiple of the native word in order to * guarantee that the entire resource descriptor is native word aligned */ return ((UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (StringLength)); } /******************************************************************************* * * FUNCTION: AcpiRsGetAmlLength * * PARAMETERS: Resource - Pointer to the resource linked list * ResourceListSize - Size of the resource linked list * SizeNeeded - Where the required size is returned * * RETURN: Status * * DESCRIPTION: Takes a linked list of internal resource descriptors and * calculates the size buffer needed to hold the corresponding * external resource byte stream. * ******************************************************************************/ ACPI_STATUS AcpiRsGetAmlLength ( ACPI_RESOURCE *Resource, ACPI_SIZE ResourceListSize, ACPI_SIZE *SizeNeeded) { ACPI_SIZE AmlSizeNeeded = 0; ACPI_RESOURCE *ResourceEnd; ACPI_RS_LENGTH TotalSize; ACPI_FUNCTION_TRACE (RsGetAmlLength); /* Traverse entire list of internal resource descriptors */ ResourceEnd = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, ResourceListSize); while (Resource < ResourceEnd) { /* Validate the descriptor type */ if (Resource->Type > ACPI_RESOURCE_TYPE_MAX) { return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE); } /* Sanity check the length. It must not be zero, or we loop forever */ if (!Resource->Length) { return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); } /* Get the base size of the (external stream) resource descriptor */ TotalSize = AcpiGbl_AmlResourceSizes [Resource->Type]; /* * Augment the base size for descriptors with optional and/or * variable-length fields */ switch (Resource->Type) { case ACPI_RESOURCE_TYPE_IRQ: /* Length can be 3 or 2 */ if (Resource->Data.Irq.DescriptorLength == 2) { TotalSize--; } break; case ACPI_RESOURCE_TYPE_START_DEPENDENT: /* Length can be 1 or 0 */ if (Resource->Data.Irq.DescriptorLength == 0) { TotalSize--; } break; case ACPI_RESOURCE_TYPE_VENDOR: /* * Vendor Defined Resource: * For a Vendor Specific resource, if the Length is between 1 and 7 * it will be created as a Small Resource data type, otherwise it * is a Large Resource data type. */ if (Resource->Data.Vendor.ByteLength > 7) { /* Base size of a Large resource descriptor */ TotalSize = sizeof (AML_RESOURCE_LARGE_HEADER); } /* Add the size of the vendor-specific data */ TotalSize = (ACPI_RS_LENGTH) (TotalSize + Resource->Data.Vendor.ByteLength); break; case ACPI_RESOURCE_TYPE_END_TAG: /* * End Tag: * We are done -- return the accumulated total size. */ *SizeNeeded = AmlSizeNeeded + TotalSize; /* Normal exit */ return_ACPI_STATUS (AE_OK); case ACPI_RESOURCE_TYPE_ADDRESS16: /* * 16-Bit Address Resource: * Add the size of the optional ResourceSource info */ TotalSize = (ACPI_RS_LENGTH) (TotalSize + AcpiRsStructOptionLength ( &Resource->Data.Address16.ResourceSource)); break; case ACPI_RESOURCE_TYPE_ADDRESS32: /* * 32-Bit Address Resource: * Add the size of the optional ResourceSource info */ TotalSize = (ACPI_RS_LENGTH) (TotalSize + AcpiRsStructOptionLength ( &Resource->Data.Address32.ResourceSource)); break; case ACPI_RESOURCE_TYPE_ADDRESS64: /* * 64-Bit Address Resource: * Add the size of the optional ResourceSource info */ TotalSize = (ACPI_RS_LENGTH) (TotalSize + AcpiRsStructOptionLength ( &Resource->Data.Address64.ResourceSource)); break; case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: /* * Extended IRQ Resource: * Add the size of each additional optional interrupt beyond the * required 1 (4 bytes for each UINT32 interrupt number) */ TotalSize = (ACPI_RS_LENGTH) (TotalSize + ((Resource->Data.ExtendedIrq.InterruptCount - 1) * 4) + /* Add the size of the optional ResourceSource info */ AcpiRsStructOptionLength ( &Resource->Data.ExtendedIrq.ResourceSource)); break; case ACPI_RESOURCE_TYPE_GPIO: TotalSize = (ACPI_RS_LENGTH) (TotalSize + (Resource->Data.Gpio.PinTableLength * 2) + Resource->Data.Gpio.ResourceSource.StringLength + Resource->Data.Gpio.VendorLength); break; case ACPI_RESOURCE_TYPE_PIN_FUNCTION: TotalSize = (ACPI_RS_LENGTH) (TotalSize + (Resource->Data.PinFunction.PinTableLength * 2) + Resource->Data.PinFunction.ResourceSource.StringLength + Resource->Data.PinFunction.VendorLength); break; case ACPI_RESOURCE_TYPE_SERIAL_BUS: TotalSize = AcpiGbl_AmlResourceSerialBusSizes [ Resource->Data.CommonSerialBus.Type]; TotalSize = (ACPI_RS_LENGTH) (TotalSize + Resource->Data.I2cSerialBus.ResourceSource.StringLength + Resource->Data.I2cSerialBus.VendorLength); break; case ACPI_RESOURCE_TYPE_PIN_CONFIG: TotalSize = (ACPI_RS_LENGTH) (TotalSize + (Resource->Data.PinConfig.PinTableLength * 2) + Resource->Data.PinConfig.ResourceSource.StringLength + Resource->Data.PinConfig.VendorLength); break; case ACPI_RESOURCE_TYPE_PIN_GROUP: TotalSize = (ACPI_RS_LENGTH) (TotalSize + (Resource->Data.PinGroup.PinTableLength * 2) + Resource->Data.PinGroup.ResourceLabel.StringLength + Resource->Data.PinGroup.VendorLength); break; case ACPI_RESOURCE_TYPE_PIN_GROUP_FUNCTION: TotalSize = (ACPI_RS_LENGTH) (TotalSize + Resource->Data.PinGroupFunction.ResourceSource.StringLength + Resource->Data.PinGroupFunction.ResourceSourceLabel.StringLength + Resource->Data.PinGroupFunction.VendorLength); break; case ACPI_RESOURCE_TYPE_PIN_GROUP_CONFIG: TotalSize = (ACPI_RS_LENGTH) (TotalSize + Resource->Data.PinGroupConfig.ResourceSource.StringLength + Resource->Data.PinGroupConfig.ResourceSourceLabel.StringLength + Resource->Data.PinGroupConfig.VendorLength); break; default: break; } /* Update the total */ AmlSizeNeeded += TotalSize; /* Point to the next object */ Resource = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, Resource->Length); } /* Did not find an EndTag resource descriptor */ return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); } /******************************************************************************* * * FUNCTION: AcpiRsGetListLength * * PARAMETERS: AmlBuffer - Pointer to the resource byte stream * AmlBufferLength - Size of AmlBuffer * SizeNeeded - Where the size needed is returned * * RETURN: Status * * DESCRIPTION: Takes an external resource byte stream and calculates the size * buffer needed to hold the corresponding internal resource * descriptor linked list. * ******************************************************************************/ ACPI_STATUS AcpiRsGetListLength ( UINT8 *AmlBuffer, UINT32 AmlBufferLength, ACPI_SIZE *SizeNeeded) { ACPI_STATUS Status; UINT8 *EndAml; UINT8 *Buffer; UINT32 BufferSize; UINT16 Temp16; UINT16 ResourceLength; UINT32 ExtraStructBytes; UINT8 ResourceIndex; UINT8 MinimumAmlResourceLength; AML_RESOURCE *AmlResource; ACPI_FUNCTION_TRACE (RsGetListLength); *SizeNeeded = ACPI_RS_SIZE_MIN; /* Minimum size is one EndTag */ EndAml = AmlBuffer + AmlBufferLength; /* Walk the list of AML resource descriptors */ while (AmlBuffer < EndAml) { /* Validate the Resource Type and Resource Length */ Status = AcpiUtValidateResource (NULL, AmlBuffer, &ResourceIndex); if (ACPI_FAILURE (Status)) { /* * Exit on failure. Cannot continue because the descriptor length * may be bogus also. */ return_ACPI_STATUS (Status); } AmlResource = (void *) AmlBuffer; /* Get the resource length and base (minimum) AML size */ ResourceLength = AcpiUtGetResourceLength (AmlBuffer); MinimumAmlResourceLength = AcpiGbl_ResourceAmlSizes[ResourceIndex]; /* * Augment the size for descriptors with optional * and/or variable length fields */ ExtraStructBytes = 0; Buffer = AmlBuffer + AcpiUtGetResourceHeaderLength (AmlBuffer); switch (AcpiUtGetResourceType (AmlBuffer)) { case ACPI_RESOURCE_NAME_IRQ: /* * IRQ Resource: * Get the number of bits set in the 16-bit IRQ mask */ ACPI_MOVE_16_TO_16 (&Temp16, Buffer); ExtraStructBytes = AcpiRsCountSetBits (Temp16); break; case ACPI_RESOURCE_NAME_DMA: /* * DMA Resource: * Get the number of bits set in the 8-bit DMA mask */ ExtraStructBytes = AcpiRsCountSetBits (*Buffer); break; case ACPI_RESOURCE_NAME_VENDOR_SMALL: case ACPI_RESOURCE_NAME_VENDOR_LARGE: /* * Vendor Resource: * Get the number of vendor data bytes */ ExtraStructBytes = ResourceLength; /* * There is already one byte included in the minimum * descriptor size. If there are extra struct bytes, * subtract one from the count. */ if (ExtraStructBytes) { ExtraStructBytes--; } break; case ACPI_RESOURCE_NAME_END_TAG: /* * End Tag: This is the normal exit */ return_ACPI_STATUS (AE_OK); case ACPI_RESOURCE_NAME_ADDRESS32: case ACPI_RESOURCE_NAME_ADDRESS16: case ACPI_RESOURCE_NAME_ADDRESS64: /* * Address Resource: * Add the size of the optional ResourceSource */ ExtraStructBytes = AcpiRsStreamOptionLength ( ResourceLength, MinimumAmlResourceLength); break; case ACPI_RESOURCE_NAME_EXTENDED_IRQ: /* * Extended IRQ Resource: * Using the InterruptTableLength, add 4 bytes for each additional * interrupt. Note: at least one interrupt is required and is * included in the minimum descriptor size (reason for the -1) */ ExtraStructBytes = (Buffer[1] - 1) * sizeof (UINT32); /* Add the size of the optional ResourceSource */ ExtraStructBytes += AcpiRsStreamOptionLength ( ResourceLength - ExtraStructBytes, MinimumAmlResourceLength); break; case ACPI_RESOURCE_NAME_GPIO: /* Vendor data is optional */ if (AmlResource->Gpio.VendorLength) { ExtraStructBytes += AmlResource->Gpio.VendorOffset - AmlResource->Gpio.PinTableOffset + AmlResource->Gpio.VendorLength; } else { ExtraStructBytes += AmlResource->LargeHeader.ResourceLength + sizeof (AML_RESOURCE_LARGE_HEADER) - AmlResource->Gpio.PinTableOffset; } break; case ACPI_RESOURCE_NAME_PIN_FUNCTION: /* Vendor data is optional */ if (AmlResource->PinFunction.VendorLength) { ExtraStructBytes += AmlResource->PinFunction.VendorOffset - AmlResource->PinFunction.PinTableOffset + AmlResource->PinFunction.VendorLength; } else { ExtraStructBytes += AmlResource->LargeHeader.ResourceLength + sizeof (AML_RESOURCE_LARGE_HEADER) - AmlResource->PinFunction.PinTableOffset; } break; case ACPI_RESOURCE_NAME_SERIAL_BUS: MinimumAmlResourceLength = AcpiGbl_ResourceAmlSerialBusSizes[ AmlResource->CommonSerialBus.Type]; ExtraStructBytes += AmlResource->CommonSerialBus.ResourceLength - MinimumAmlResourceLength; break; case ACPI_RESOURCE_NAME_PIN_CONFIG: /* Vendor data is optional */ if (AmlResource->PinConfig.VendorLength) { ExtraStructBytes += AmlResource->PinConfig.VendorOffset - AmlResource->PinConfig.PinTableOffset + AmlResource->PinConfig.VendorLength; } else { ExtraStructBytes += AmlResource->LargeHeader.ResourceLength + sizeof (AML_RESOURCE_LARGE_HEADER) - AmlResource->PinConfig.PinTableOffset; } break; case ACPI_RESOURCE_NAME_PIN_GROUP: ExtraStructBytes += AmlResource->PinGroup.VendorOffset - AmlResource->PinGroup.PinTableOffset + AmlResource->PinGroup.VendorLength; break; case ACPI_RESOURCE_NAME_PIN_GROUP_FUNCTION: ExtraStructBytes += AmlResource->PinGroupFunction.VendorOffset - AmlResource->PinGroupFunction.ResSourceOffset + AmlResource->PinGroupFunction.VendorLength; break; case ACPI_RESOURCE_NAME_PIN_GROUP_CONFIG: ExtraStructBytes += AmlResource->PinGroupConfig.VendorOffset - AmlResource->PinGroupConfig.ResSourceOffset + AmlResource->PinGroupConfig.VendorLength; break; default: break; } /* * Update the required buffer size for the internal descriptor structs * * Important: Round the size up for the appropriate alignment. This * is a requirement on IA64. */ if (AcpiUtGetResourceType (AmlBuffer) == ACPI_RESOURCE_NAME_SERIAL_BUS) { BufferSize = AcpiGbl_ResourceStructSerialBusSizes[ AmlResource->CommonSerialBus.Type] + ExtraStructBytes; } else { BufferSize = AcpiGbl_ResourceStructSizes[ResourceIndex] + ExtraStructBytes; } BufferSize = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (BufferSize); *SizeNeeded += BufferSize; ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES, "Type %.2X, AmlLength %.2X InternalLength %.2X%8X\n", AcpiUtGetResourceType (AmlBuffer), AcpiUtGetDescriptorLength (AmlBuffer), ACPI_FORMAT_UINT64(*SizeNeeded))); /* * Point to the next resource within the AML stream using the length * contained in the resource descriptor header */ AmlBuffer += AcpiUtGetDescriptorLength (AmlBuffer); } /* Did not find an EndTag resource descriptor */ return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); } /******************************************************************************* * * FUNCTION: AcpiRsGetPciRoutingTableLength * * PARAMETERS: PackageObject - Pointer to the package object * BufferSizeNeeded - UINT32 pointer of the size buffer * needed to properly return the * parsed data * * RETURN: Status * * DESCRIPTION: Given a package representing a PCI routing table, this * calculates the size of the corresponding linked list of * descriptions. * ******************************************************************************/ ACPI_STATUS AcpiRsGetPciRoutingTableLength ( ACPI_OPERAND_OBJECT *PackageObject, ACPI_SIZE *BufferSizeNeeded) { UINT32 NumberOfElements; ACPI_SIZE TempSizeNeeded = 0; ACPI_OPERAND_OBJECT **TopObjectList; UINT32 Index; ACPI_OPERAND_OBJECT *PackageElement; ACPI_OPERAND_OBJECT **SubObjectList; BOOLEAN NameFound; UINT32 TableIndex; ACPI_FUNCTION_TRACE (RsGetPciRoutingTableLength); NumberOfElements = PackageObject->Package.Count; /* * Calculate the size of the return buffer. * The base size is the number of elements * the sizes of the * structures. Additional space for the strings is added below. * The minus one is to subtract the size of the UINT8 Source[1] * member because it is added below. * * But each PRT_ENTRY structure has a pointer to a string and * the size of that string must be found. */ TopObjectList = PackageObject->Package.Elements; for (Index = 0; Index < NumberOfElements; Index++) { /* Dereference the subpackage */ PackageElement = *TopObjectList; /* We must have a valid Package object */ if (!PackageElement || (PackageElement->Common.Type != ACPI_TYPE_PACKAGE)) { return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } /* * The SubObjectList will now point to an array of the * four IRQ elements: Address, Pin, Source and SourceIndex */ SubObjectList = PackageElement->Package.Elements; /* Scan the IrqTableElements for the Source Name String */ NameFound = FALSE; for (TableIndex = 0; TableIndex < PackageElement->Package.Count && !NameFound; TableIndex++) { if (*SubObjectList && /* Null object allowed */ ((ACPI_TYPE_STRING == (*SubObjectList)->Common.Type) || ((ACPI_TYPE_LOCAL_REFERENCE == (*SubObjectList)->Common.Type) && ((*SubObjectList)->Reference.Class == ACPI_REFCLASS_NAME)))) { NameFound = TRUE; } else { /* Look at the next element */ SubObjectList++; } } TempSizeNeeded += (sizeof (ACPI_PCI_ROUTING_TABLE) - 4); /* Was a String type found? */ if (NameFound) { if ((*SubObjectList)->Common.Type == ACPI_TYPE_STRING) { /* * The length String.Length field does not include the * terminating NULL, add 1 */ TempSizeNeeded += ((ACPI_SIZE) (*SubObjectList)->String.Length + 1); } else { TempSizeNeeded += AcpiNsGetPathnameLength ( (*SubObjectList)->Reference.Node); } } else { /* * If no name was found, then this is a NULL, which is * translated as a UINT32 zero. */ TempSizeNeeded += sizeof (UINT32); } /* Round up the size since each element must be aligned */ TempSizeNeeded = ACPI_ROUND_UP_TO_64BIT (TempSizeNeeded); /* Point to the next ACPI_OPERAND_OBJECT */ TopObjectList++; } /* * Add an extra element to the end of the list, essentially a * NULL terminator */ *BufferSizeNeeded = TempSizeNeeded + sizeof (ACPI_PCI_ROUTING_TABLE); return_ACPI_STATUS (AE_OK); }