9560b6dea8
- 99% of the code is Intel's ACPICA. The license is compliant with BSD and GNU and virtually all systems that use ACPI use this code, For instance it is part of the Linux kernel. - The only minix specific files are acpi.c osminixxf.c platform/acminix.h and include/minix/acpi.h - At the moment the driver does not register interrupt hooks which I believe is mainly for handling PnP, events like "battery level is low" and power management. Should not be difficult to add it if need be. - The interface to the outside world is virtually non-existent except a trivial message based service for PCI driver to query which device is connected to what IRQ line. This will evolve as more components start using this driver. VM, Scheduler and IOMMU are the possible users right now. - because of dependency on a native 64bit (long long, part of c99) it is compiled only with a gnu-like compilers which in case of Minix includes gcc llvm-gcc and clang
746 lines
24 KiB
C
746 lines
24 KiB
C
/*******************************************************************************
|
|
*
|
|
* Module Name: rscalc - Calculate stream and list lengths
|
|
*
|
|
******************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 1. Copyright Notice
|
|
*
|
|
* Some or all of this work - Copyright (c) 1999 - 2010, 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 "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
|
|
* 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 *SizeNeeded)
|
|
{
|
|
ACPI_SIZE AmlSizeNeeded = 0;
|
|
ACPI_RS_LENGTH TotalSize;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (RsGetAmlLength);
|
|
|
|
|
|
/* Traverse entire list of internal resource descriptors */
|
|
|
|
while (Resource)
|
|
{
|
|
/* Validate the descriptor type */
|
|
|
|
if (Resource->Type > ACPI_RESOURCE_TYPE_MAX)
|
|
{
|
|
return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
|
|
}
|
|
|
|
/* 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;
|
|
|
|
|
|
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;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (RsGetListLength);
|
|
|
|
|
|
*SizeNeeded = 0;
|
|
EndAml = AmlBuffer + AmlBufferLength;
|
|
|
|
/* Walk the list of AML resource descriptors */
|
|
|
|
while (AmlBuffer < EndAml)
|
|
{
|
|
/* Validate the Resource Type and Resource Length */
|
|
|
|
Status = AcpiUtValidateResource (AmlBuffer, &ResourceIndex);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* 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;
|
|
break;
|
|
|
|
|
|
case ACPI_RESOURCE_NAME_END_TAG:
|
|
/*
|
|
* End Tag:
|
|
* This is the normal exit, add size of EndTag
|
|
*/
|
|
*SizeNeeded += ACPI_RS_SIZE_MIN;
|
|
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;
|
|
|
|
|
|
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.
|
|
*/
|
|
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\n",
|
|
AcpiUtGetResourceType (AmlBuffer),
|
|
AcpiUtGetDescriptorLength (AmlBuffer), BufferSize));
|
|
|
|
/*
|
|
* 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 sub-package */
|
|
|
|
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 < 4 && !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);
|
|
}
|