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Diffstat (limited to 'sys/contrib/dev/acpica/rscalc.c')
| -rw-r--r-- | sys/contrib/dev/acpica/rscalc.c | 953 |
1 files changed, 953 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/rscalc.c b/sys/contrib/dev/acpica/rscalc.c new file mode 100644 index 0000000..b125ee5 --- /dev/null +++ b/sys/contrib/dev/acpica/rscalc.c @@ -0,0 +1,953 @@ +/******************************************************************************* + * + * Module Name: rscalc - Calculate stream and list lengths + * $Revision: 44 $ + * + ******************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2002, 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 __RSCALC_C__ + +#include "acpi.h" +#include "acresrc.h" +#include "amlcode.h" +#include "acnamesp.h" + +#define _COMPONENT ACPI_RESOURCES + ACPI_MODULE_NAME ("rscalc") + + +/******************************************************************************* + * + * FUNCTION: AcpiRsGetByteStreamLength + * + * PARAMETERS: LinkedList - Pointer to the resource linked list + * SizeNeeded - UINT32 pointer of the size buffer needed + * to properly return the parsed data + * + * RETURN: Status + * + * DESCRIPTION: Takes the resource byte stream and parses it once, calculating + * the size buffer needed to hold the linked list that conveys + * the resource data. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiRsGetByteStreamLength ( + ACPI_RESOURCE *LinkedList, + ACPI_SIZE *SizeNeeded) +{ + ACPI_SIZE ByteStreamSizeNeeded = 0; + ACPI_SIZE SegmentSize; + ACPI_RESOURCE_EXT_IRQ *ExIrq = NULL; + BOOLEAN Done = FALSE; + + + ACPI_FUNCTION_TRACE ("RsGetByteStreamLength"); + + + while (!Done) + { + /* + * Init the variable that will hold the size to add to the total. + */ + SegmentSize = 0; + + switch (LinkedList->Id) + { + case ACPI_RSTYPE_IRQ: + /* + * IRQ Resource + * For an IRQ Resource, Byte 3, although optional, will + * always be created - it holds IRQ information. + */ + SegmentSize = 4; + break; + + case ACPI_RSTYPE_DMA: + /* + * DMA Resource + * For this resource the size is static + */ + SegmentSize = 3; + break; + + case ACPI_RSTYPE_START_DPF: + /* + * Start Dependent Functions Resource + * For a StartDependentFunctions Resource, Byte 1, + * although optional, will always be created. + */ + SegmentSize = 2; + break; + + case ACPI_RSTYPE_END_DPF: + /* + * End Dependent Functions Resource + * For this resource the size is static + */ + SegmentSize = 1; + break; + + case ACPI_RSTYPE_IO: + /* + * IO Port Resource + * For this resource the size is static + */ + SegmentSize = 8; + break; + + case ACPI_RSTYPE_FIXED_IO: + /* + * Fixed IO Port Resource + * For this resource the size is static + */ + SegmentSize = 4; + break; + + case ACPI_RSTYPE_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 (LinkedList->Data.VendorSpecific.Length > 7) + { + SegmentSize = 3; + } + else + { + SegmentSize = 1; + } + SegmentSize += LinkedList->Data.VendorSpecific.Length; + break; + + case ACPI_RSTYPE_END_TAG: + /* + * End Tag + * For this resource the size is static + */ + SegmentSize = 2; + Done = TRUE; + break; + + case ACPI_RSTYPE_MEM24: + /* + * 24-Bit Memory Resource + * For this resource the size is static + */ + SegmentSize = 12; + break; + + case ACPI_RSTYPE_MEM32: + /* + * 32-Bit Memory Range Resource + * For this resource the size is static + */ + SegmentSize = 20; + break; + + case ACPI_RSTYPE_FIXED_MEM32: + /* + * 32-Bit Fixed Memory Resource + * For this resource the size is static + */ + SegmentSize = 12; + break; + + case ACPI_RSTYPE_ADDRESS16: + /* + * 16-Bit Address Resource + * The base size of this byte stream is 16. If a + * Resource Source string is not NULL, add 1 for + * the Index + the length of the null terminated + * string Resource Source + 1 for the null. + */ + SegmentSize = 16; + + if (LinkedList->Data.Address16.ResourceSource.StringPtr) + { + SegmentSize += LinkedList->Data.Address16.ResourceSource.StringLength; + SegmentSize++; + } + break; + + case ACPI_RSTYPE_ADDRESS32: + /* + * 32-Bit Address Resource + * The base size of this byte stream is 26. If a Resource + * Source string is not NULL, add 1 for the Index + the + * length of the null terminated string Resource Source + + * 1 for the null. + */ + SegmentSize = 26; + + if (LinkedList->Data.Address32.ResourceSource.StringPtr) + { + SegmentSize += LinkedList->Data.Address32.ResourceSource.StringLength; + SegmentSize++; + } + break; + + case ACPI_RSTYPE_ADDRESS64: + /* + * 64-Bit Address Resource + * The base size of this byte stream is 46. If a Resource + * Source string is not NULL, add 1 for the Index + the + * length of the null terminated string Resource Source + + * 1 for the null. + */ + SegmentSize = 46; + + if (LinkedList->Data.Address64.ResourceSource.StringPtr) + { + SegmentSize += LinkedList->Data.Address64.ResourceSource.StringLength; + SegmentSize++; + } + break; + + case ACPI_RSTYPE_EXT_IRQ: + /* + * Extended IRQ Resource + * The base size of this byte stream is 9. This is for an + * Interrupt table length of 1. For each additional + * interrupt, add 4. + * If a Resource Source string is not NULL, add 1 for the + * Index + the length of the null terminated string + * Resource Source + 1 for the null. + */ + SegmentSize = 9 + + (((ACPI_SIZE) LinkedList->Data.ExtendedIrq.NumberOfInterrupts - 1) * 4); + + if (ExIrq && ExIrq->ResourceSource.StringPtr) + { + SegmentSize += LinkedList->Data.ExtendedIrq.ResourceSource.StringLength; + SegmentSize++; + } + break; + + default: + /* + * If we get here, everything is out of sync, + * so exit with an error + */ + return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE); + + } /* switch (LinkedList->Id) */ + + /* + * Update the total + */ + ByteStreamSizeNeeded += SegmentSize; + + /* + * Point to the next object + */ + LinkedList = ACPI_PTR_ADD (ACPI_RESOURCE, + LinkedList, LinkedList->Length); + } + + /* + * This is the data the caller needs + */ + *SizeNeeded = ByteStreamSizeNeeded; + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiRsGetListLength + * + * PARAMETERS: ByteStreamBuffer - Pointer to the resource byte stream + * ByteStreamBufferLength - Size of ByteStreamBuffer + * SizeNeeded - UINT32 pointer of the size buffer + * needed to properly return the + * parsed data + * + * RETURN: Status + * + * DESCRIPTION: Takes the resource byte stream and parses it once, calculating + * the size buffer needed to hold the linked list that conveys + * the resource data. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiRsGetListLength ( + UINT8 *ByteStreamBuffer, + UINT32 ByteStreamBufferLength, + ACPI_SIZE *SizeNeeded) +{ + UINT32 BufferSize = 0; + UINT32 BytesParsed = 0; + UINT8 NumberOfInterrupts = 0; + UINT8 NumberOfChannels = 0; + UINT8 ResourceType; + UINT32 StructureSize; + UINT32 BytesConsumed; + UINT8 *Buffer; + UINT8 Temp8; + UINT16 Temp16; + UINT8 Index; + UINT8 AdditionalBytes; + + + ACPI_FUNCTION_TRACE ("RsGetListLength"); + + + while (BytesParsed < ByteStreamBufferLength) + { + /* + * The next byte in the stream is the resource type + */ + ResourceType = AcpiRsGetResourceType (*ByteStreamBuffer); + + switch (ResourceType) + { + case ACPI_RDESC_TYPE_MEMORY_24: + /* + * 24-Bit Memory Resource + */ + BytesConsumed = 12; + + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_MEM24); + break; + + + case ACPI_RDESC_TYPE_LARGE_VENDOR: + /* + * Vendor Defined Resource + */ + Buffer = ByteStreamBuffer; + ++Buffer; + + ACPI_MOVE_UNALIGNED16_TO_16 (&Temp16, Buffer); + BytesConsumed = Temp16 + 3; + + /* + * Ensure a 32-bit boundary for the structure + */ + Temp16 = (UINT16) ACPI_ROUND_UP_TO_32BITS (Temp16); + + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_VENDOR) + + (Temp16 * sizeof (UINT8)); + break; + + + case ACPI_RDESC_TYPE_MEMORY_32: + /* + * 32-Bit Memory Range Resource + */ + + BytesConsumed = 20; + + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_MEM32); + break; + + + case ACPI_RDESC_TYPE_FIXED_MEMORY_32: + /* + * 32-Bit Fixed Memory Resource + */ + BytesConsumed = 12; + + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_FIXED_MEM32); + break; + + + case ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE: + /* + * 64-Bit Address Resource + */ + Buffer = ByteStreamBuffer; + + ++Buffer; + ACPI_MOVE_UNALIGNED16_TO_16 (&Temp16, Buffer); + + BytesConsumed = Temp16 + 3; + + /* + * Resource Source Index and Resource Source are + * optional elements. Check the length of the + * Bytestream. If it is greater than 43, that + * means that an Index exists and is followed by + * a null termininated string. Therefore, set + * the temp variable to the length minus the minimum + * byte stream length plus the byte for the Index to + * determine the size of the NULL terminiated string. + */ + if (43 < Temp16) + { + Temp8 = (UINT8) (Temp16 - 44); + } + else + { + Temp8 = 0; + } + + /* + * Ensure a 64-bit boundary for the structure + */ + Temp8 = (UINT8) ACPI_ROUND_UP_TO_64BITS (Temp8); + + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_ADDRESS64) + + (Temp8 * sizeof (UINT8)); + break; + + + case ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE: + /* + * 32-Bit Address Resource + */ + Buffer = ByteStreamBuffer; + + ++Buffer; + ACPI_MOVE_UNALIGNED16_TO_16 (&Temp16, Buffer); + + BytesConsumed = Temp16 + 3; + + /* + * Resource Source Index and Resource Source are + * optional elements. Check the length of the + * Bytestream. If it is greater than 23, that + * means that an Index exists and is followed by + * a null termininated string. Therefore, set + * the temp variable to the length minus the minimum + * byte stream length plus the byte for the Index to + * determine the size of the NULL terminiated string. + */ + if (23 < Temp16) + { + Temp8 = (UINT8) (Temp16 - 24); + } + else + { + Temp8 = 0; + } + + /* + * Ensure a 32-bit boundary for the structure + */ + Temp8 = (UINT8) ACPI_ROUND_UP_TO_32BITS (Temp8); + + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_ADDRESS32) + + (Temp8 * sizeof (UINT8)); + break; + + + case ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE: + /* + * 16-Bit Address Resource + */ + Buffer = ByteStreamBuffer; + + ++Buffer; + ACPI_MOVE_UNALIGNED16_TO_16 (&Temp16, Buffer); + + BytesConsumed = Temp16 + 3; + + /* + * Resource Source Index and Resource Source are + * optional elements. Check the length of the + * Bytestream. If it is greater than 13, that + * means that an Index exists and is followed by + * a null termininated string. Therefore, set + * the temp variable to the length minus the minimum + * byte stream length plus the byte for the Index to + * determine the size of the NULL terminiated string. + */ + if (13 < Temp16) + { + Temp8 = (UINT8) (Temp16 - 14); + } + else + { + Temp8 = 0; + } + + /* + * Ensure a 32-bit boundary for the structure + */ + Temp8 = (UINT8) ACPI_ROUND_UP_TO_32BITS (Temp8); + + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_ADDRESS16) + + (Temp8 * sizeof (UINT8)); + break; + + + case ACPI_RDESC_TYPE_EXTENDED_XRUPT: + /* + * Extended IRQ + */ + Buffer = ByteStreamBuffer; + + ++Buffer; + ACPI_MOVE_UNALIGNED16_TO_16 (&Temp16, Buffer); + + BytesConsumed = Temp16 + 3; + + /* + * Point past the length field and the + * Interrupt vector flags to save off the + * Interrupt table length to the Temp8 variable. + */ + Buffer += 3; + Temp8 = *Buffer; + + /* + * To compensate for multiple interrupt numbers, add 4 bytes for + * each additional interrupts greater than 1 + */ + AdditionalBytes = (UINT8) ((Temp8 - 1) * 4); + + /* + * Resource Source Index and Resource Source are + * optional elements. Check the length of the + * Bytestream. If it is greater than 9, that + * means that an Index exists and is followed by + * a null termininated string. Therefore, set + * the temp variable to the length minus the minimum + * byte stream length plus the byte for the Index to + * determine the size of the NULL terminiated string. + */ + if (9 + AdditionalBytes < Temp16) + { + Temp8 = (UINT8) (Temp16 - (9 + AdditionalBytes)); + } + else + { + Temp8 = 0; + } + + /* + * Ensure a 32-bit boundary for the structure + */ + Temp8 = (UINT8) ACPI_ROUND_UP_TO_32BITS (Temp8); + + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_EXT_IRQ) + + (AdditionalBytes * sizeof (UINT8)) + + (Temp8 * sizeof (UINT8)); + break; + + + case ACPI_RDESC_TYPE_IRQ_FORMAT: + /* + * IRQ Resource. + * Determine if it there are two or three trailing bytes + */ + Buffer = ByteStreamBuffer; + Temp8 = *Buffer; + + if(Temp8 & 0x01) + { + BytesConsumed = 4; + } + else + { + BytesConsumed = 3; + } + + /* + * Point past the descriptor + */ + ++Buffer; + + /* + * Look at the number of bits set + */ + ACPI_MOVE_UNALIGNED16_TO_16 (&Temp16, Buffer); + + for (Index = 0; Index < 16; Index++) + { + if (Temp16 & 0x1) + { + ++NumberOfInterrupts; + } + + Temp16 >>= 1; + } + + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_IO) + + (NumberOfInterrupts * sizeof (UINT32)); + break; + + + case ACPI_RDESC_TYPE_DMA_FORMAT: + /* + * DMA Resource + */ + Buffer = ByteStreamBuffer; + BytesConsumed = 3; + + /* + * Point past the descriptor + */ + ++Buffer; + + /* + * Look at the number of bits set + */ + Temp8 = *Buffer; + + for(Index = 0; Index < 8; Index++) + { + if(Temp8 & 0x1) + { + ++NumberOfChannels; + } + + Temp8 >>= 1; + } + + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_DMA) + + (NumberOfChannels * sizeof (UINT32)); + break; + + + case ACPI_RDESC_TYPE_START_DEPENDENT: + /* + * Start Dependent Functions Resource + * Determine if it there are two or three trailing bytes + */ + Buffer = ByteStreamBuffer; + Temp8 = *Buffer; + + if(Temp8 & 0x01) + { + BytesConsumed = 2; + } + else + { + BytesConsumed = 1; + } + + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_START_DPF); + break; + + + case ACPI_RDESC_TYPE_END_DEPENDENT: + /* + * End Dependent Functions Resource + */ + BytesConsumed = 1; + StructureSize = ACPI_RESOURCE_LENGTH; + break; + + + case ACPI_RDESC_TYPE_IO_PORT: + /* + * IO Port Resource + */ + BytesConsumed = 8; + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_IO); + break; + + + case ACPI_RDESC_TYPE_FIXED_IO_PORT: + /* + * Fixed IO Port Resource + */ + BytesConsumed = 4; + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_FIXED_IO); + break; + + + case ACPI_RDESC_TYPE_SMALL_VENDOR: + /* + * Vendor Specific Resource + */ + Buffer = ByteStreamBuffer; + + Temp8 = *Buffer; + Temp8 = (UINT8) (Temp8 & 0x7); + BytesConsumed = Temp8 + 1; + + /* + * Ensure a 32-bit boundary for the structure + */ + Temp8 = (UINT8) ACPI_ROUND_UP_TO_32BITS (Temp8); + StructureSize = ACPI_SIZEOF_RESOURCE (ACPI_RESOURCE_VENDOR) + + (Temp8 * sizeof (UINT8)); + break; + + + case ACPI_RDESC_TYPE_END_TAG: + /* + * End Tag + */ + BytesConsumed = 2; + StructureSize = ACPI_RESOURCE_LENGTH; + ByteStreamBufferLength = BytesParsed; + break; + + + default: + /* + * If we get here, everything is out of sync, + * so exit with an error + */ + return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE); + } + + /* + * Update the return value and counter + */ + BufferSize += ACPI_ALIGN_RESOURCE_SIZE(StructureSize); + BytesParsed += BytesConsumed; + + /* + * Set the byte stream to point to the next resource + */ + ByteStreamBuffer += BytesConsumed; + } + + /* + * This is the data the caller needs + */ + *SizeNeeded = BufferSize; + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * 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 sub-package + */ + PackageElement = *TopObjectList; + + /* + * 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 < 4 && !NameFound; TableIndex++) + { + if ((ACPI_TYPE_STRING == ACPI_GET_OBJECT_TYPE (*SubObjectList)) || + ((ACPI_TYPE_LOCAL_REFERENCE == ACPI_GET_OBJECT_TYPE (*SubObjectList)) && + ((*SubObjectList)->Reference.Opcode == AML_INT_NAMEPATH_OP))) + { + NameFound = TRUE; + } + else + { + /* + * Look at the next element + */ + SubObjectList++; + } + } + + TempSizeNeeded += (sizeof (ACPI_PCI_ROUTING_TABLE) - 4); + + /* + * Was a String type found? + */ + if (NameFound) + { + if (ACPI_GET_OBJECT_TYPE (*SubObjectList) == ACPI_TYPE_STRING) + { + /* + * The length String.Length field includes the + * terminating NULL + */ + TempSizeNeeded += (*SubObjectList)->String.Length; + } + 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_64BITS (TempSizeNeeded); + + /* + * Point to the next ACPI_OPERAND_OBJECT + */ + TopObjectList++; + } + + /* + * Adding 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); +} |
