674 lines
20 KiB
C
674 lines
20 KiB
C
/*******************************************************************************
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*
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* Module Name: rscalc - Calculate stream and list lengths
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2011, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#define __RSCALC_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acresrc.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_RESOURCES
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ACPI_MODULE_NAME ("rscalc")
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/* Local prototypes */
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static UINT8
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AcpiRsCountSetBits (
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UINT16 BitField);
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static ACPI_RS_LENGTH
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AcpiRsStructOptionLength (
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ACPI_RESOURCE_SOURCE *ResourceSource);
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static UINT32
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AcpiRsStreamOptionLength (
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UINT32 ResourceLength,
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UINT32 MinimumTotalLength);
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/*******************************************************************************
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*
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* FUNCTION: AcpiRsCountSetBits
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*
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* PARAMETERS: BitField - Field in which to count bits
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*
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* RETURN: Number of bits set within the field
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*
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* DESCRIPTION: Count the number of bits set in a resource field. Used for
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* (Short descriptor) interrupt and DMA lists.
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*
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******************************************************************************/
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static UINT8
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AcpiRsCountSetBits (
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UINT16 BitField)
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{
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UINT8 BitsSet;
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ACPI_FUNCTION_ENTRY ();
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for (BitsSet = 0; BitField; BitsSet++)
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{
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/* Zero the least significant bit that is set */
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BitField &= (UINT16) (BitField - 1);
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}
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return (BitsSet);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiRsStructOptionLength
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*
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* PARAMETERS: ResourceSource - Pointer to optional descriptor field
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*
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* RETURN: Status
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*
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* DESCRIPTION: Common code to handle optional ResourceSourceIndex and
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* ResourceSource fields in some Large descriptors. Used during
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* list-to-stream conversion
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*
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******************************************************************************/
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static ACPI_RS_LENGTH
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AcpiRsStructOptionLength (
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ACPI_RESOURCE_SOURCE *ResourceSource)
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{
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ACPI_FUNCTION_ENTRY ();
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/*
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* If the ResourceSource string is valid, return the size of the string
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* (StringLength includes the NULL terminator) plus the size of the
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* ResourceSourceIndex (1).
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*/
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if (ResourceSource->StringPtr)
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{
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return ((ACPI_RS_LENGTH) (ResourceSource->StringLength + 1));
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}
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return (0);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiRsStreamOptionLength
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*
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* PARAMETERS: ResourceLength - Length from the resource header
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* MinimumTotalLength - Minimum length of this resource, before
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* any optional fields. Includes header size
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*
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* RETURN: Length of optional string (0 if no string present)
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*
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* DESCRIPTION: Common code to handle optional ResourceSourceIndex and
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* ResourceSource fields in some Large descriptors. Used during
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* stream-to-list conversion
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*
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******************************************************************************/
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static UINT32
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AcpiRsStreamOptionLength (
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UINT32 ResourceLength,
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UINT32 MinimumAmlResourceLength)
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{
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UINT32 StringLength = 0;
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ACPI_FUNCTION_ENTRY ();
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/*
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* The ResourceSourceIndex and ResourceSource are optional elements of some
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* Large-type resource descriptors.
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*/
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/*
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* If the length of the actual resource descriptor is greater than the ACPI
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* spec-defined minimum length, it means that a ResourceSourceIndex exists
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* and is followed by a (required) null terminated string. The string length
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* (including the null terminator) is the resource length minus the minimum
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* length, minus one byte for the ResourceSourceIndex itself.
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*/
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if (ResourceLength > MinimumAmlResourceLength)
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{
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/* Compute the length of the optional string */
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StringLength = ResourceLength - MinimumAmlResourceLength - 1;
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}
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/*
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* Round the length up to a multiple of the native word in order to
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* guarantee that the entire resource descriptor is native word aligned
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*/
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return ((UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (StringLength));
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiRsGetAmlLength
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*
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* PARAMETERS: Resource - Pointer to the resource linked list
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* SizeNeeded - Where the required size is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Takes a linked list of internal resource descriptors and
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* calculates the size buffer needed to hold the corresponding
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* external resource byte stream.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiRsGetAmlLength (
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ACPI_RESOURCE *Resource,
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ACPI_SIZE *SizeNeeded)
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{
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ACPI_SIZE AmlSizeNeeded = 0;
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ACPI_RS_LENGTH TotalSize;
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ACPI_FUNCTION_TRACE (RsGetAmlLength);
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/* Traverse entire list of internal resource descriptors */
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while (Resource)
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{
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/* Validate the descriptor type */
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if (Resource->Type > ACPI_RESOURCE_TYPE_MAX)
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{
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return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
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}
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/* Get the base size of the (external stream) resource descriptor */
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TotalSize = AcpiGbl_AmlResourceSizes [Resource->Type];
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/*
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* Augment the base size for descriptors with optional and/or
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* variable-length fields
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*/
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switch (Resource->Type)
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{
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case ACPI_RESOURCE_TYPE_IRQ:
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/* Length can be 3 or 2 */
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if (Resource->Data.Irq.DescriptorLength == 2)
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{
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TotalSize--;
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}
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break;
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case ACPI_RESOURCE_TYPE_START_DEPENDENT:
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/* Length can be 1 or 0 */
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if (Resource->Data.Irq.DescriptorLength == 0)
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{
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TotalSize--;
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}
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break;
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case ACPI_RESOURCE_TYPE_VENDOR:
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/*
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* Vendor Defined Resource:
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* For a Vendor Specific resource, if the Length is between 1 and 7
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* it will be created as a Small Resource data type, otherwise it
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* is a Large Resource data type.
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*/
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if (Resource->Data.Vendor.ByteLength > 7)
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{
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/* Base size of a Large resource descriptor */
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TotalSize = sizeof (AML_RESOURCE_LARGE_HEADER);
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}
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/* Add the size of the vendor-specific data */
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TotalSize = (ACPI_RS_LENGTH)
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(TotalSize + Resource->Data.Vendor.ByteLength);
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break;
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case ACPI_RESOURCE_TYPE_END_TAG:
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/*
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* End Tag:
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* We are done -- return the accumulated total size.
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*/
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*SizeNeeded = AmlSizeNeeded + TotalSize;
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/* Normal exit */
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return_ACPI_STATUS (AE_OK);
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case ACPI_RESOURCE_TYPE_ADDRESS16:
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/*
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* 16-Bit Address Resource:
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* Add the size of the optional ResourceSource info
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*/
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TotalSize = (ACPI_RS_LENGTH)
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(TotalSize + AcpiRsStructOptionLength (
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&Resource->Data.Address16.ResourceSource));
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break;
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case ACPI_RESOURCE_TYPE_ADDRESS32:
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/*
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* 32-Bit Address Resource:
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* Add the size of the optional ResourceSource info
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*/
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TotalSize = (ACPI_RS_LENGTH)
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(TotalSize + AcpiRsStructOptionLength (
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&Resource->Data.Address32.ResourceSource));
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break;
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case ACPI_RESOURCE_TYPE_ADDRESS64:
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/*
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* 64-Bit Address Resource:
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* Add the size of the optional ResourceSource info
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*/
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TotalSize = (ACPI_RS_LENGTH)
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(TotalSize + AcpiRsStructOptionLength (
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&Resource->Data.Address64.ResourceSource));
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break;
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case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
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/*
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* Extended IRQ Resource:
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* Add the size of each additional optional interrupt beyond the
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* required 1 (4 bytes for each UINT32 interrupt number)
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*/
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TotalSize = (ACPI_RS_LENGTH)
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(TotalSize +
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((Resource->Data.ExtendedIrq.InterruptCount - 1) * 4) +
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/* Add the size of the optional ResourceSource info */
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AcpiRsStructOptionLength (
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&Resource->Data.ExtendedIrq.ResourceSource));
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break;
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default:
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break;
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}
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/* Update the total */
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AmlSizeNeeded += TotalSize;
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/* Point to the next object */
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Resource = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, Resource->Length);
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}
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/* Did not find an EndTag resource descriptor */
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return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiRsGetListLength
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*
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* PARAMETERS: AmlBuffer - Pointer to the resource byte stream
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* AmlBufferLength - Size of AmlBuffer
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* SizeNeeded - Where the size needed is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Takes an external resource byte stream and calculates the size
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* buffer needed to hold the corresponding internal resource
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* descriptor linked list.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiRsGetListLength (
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UINT8 *AmlBuffer,
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UINT32 AmlBufferLength,
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ACPI_SIZE *SizeNeeded)
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{
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ACPI_STATUS Status;
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UINT8 *EndAml;
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UINT8 *Buffer;
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UINT32 BufferSize;
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UINT16 Temp16;
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UINT16 ResourceLength;
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UINT32 ExtraStructBytes;
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UINT8 ResourceIndex;
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UINT8 MinimumAmlResourceLength;
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ACPI_FUNCTION_TRACE (RsGetListLength);
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*SizeNeeded = 0;
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EndAml = AmlBuffer + AmlBufferLength;
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/* Walk the list of AML resource descriptors */
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while (AmlBuffer < EndAml)
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{
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/* Validate the Resource Type and Resource Length */
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Status = AcpiUtValidateResource (AmlBuffer, &ResourceIndex);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Get the resource length and base (minimum) AML size */
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ResourceLength = AcpiUtGetResourceLength (AmlBuffer);
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MinimumAmlResourceLength = AcpiGbl_ResourceAmlSizes[ResourceIndex];
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/*
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* Augment the size for descriptors with optional
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* and/or variable length fields
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*/
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ExtraStructBytes = 0;
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Buffer = AmlBuffer + AcpiUtGetResourceHeaderLength (AmlBuffer);
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switch (AcpiUtGetResourceType (AmlBuffer))
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{
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case ACPI_RESOURCE_NAME_IRQ:
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/*
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* IRQ Resource:
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* Get the number of bits set in the 16-bit IRQ mask
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*/
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ACPI_MOVE_16_TO_16 (&Temp16, Buffer);
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ExtraStructBytes = AcpiRsCountSetBits (Temp16);
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break;
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case ACPI_RESOURCE_NAME_DMA:
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/*
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* DMA Resource:
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* Get the number of bits set in the 8-bit DMA mask
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*/
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ExtraStructBytes = AcpiRsCountSetBits (*Buffer);
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break;
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case ACPI_RESOURCE_NAME_VENDOR_SMALL:
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case ACPI_RESOURCE_NAME_VENDOR_LARGE:
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/*
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* Vendor Resource:
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* Get the number of vendor data bytes
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*/
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ExtraStructBytes = ResourceLength;
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break;
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case ACPI_RESOURCE_NAME_END_TAG:
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/*
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* End Tag:
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* This is the normal exit, add size of EndTag
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*/
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*SizeNeeded += ACPI_RS_SIZE_MIN;
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return_ACPI_STATUS (AE_OK);
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case ACPI_RESOURCE_NAME_ADDRESS32:
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case ACPI_RESOURCE_NAME_ADDRESS16:
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case ACPI_RESOURCE_NAME_ADDRESS64:
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/*
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* Address Resource:
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* Add the size of the optional ResourceSource
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*/
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ExtraStructBytes = AcpiRsStreamOptionLength (
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ResourceLength, MinimumAmlResourceLength);
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break;
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case ACPI_RESOURCE_NAME_EXTENDED_IRQ:
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/*
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* Extended IRQ Resource:
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* Using the InterruptTableLength, add 4 bytes for each additional
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* interrupt. Note: at least one interrupt is required and is
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* included in the minimum descriptor size (reason for the -1)
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*/
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ExtraStructBytes = (Buffer[1] - 1) * sizeof (UINT32);
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/* Add the size of the optional ResourceSource */
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ExtraStructBytes += AcpiRsStreamOptionLength (
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ResourceLength - ExtraStructBytes, MinimumAmlResourceLength);
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break;
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default:
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break;
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}
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/*
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* Update the required buffer size for the internal descriptor structs
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*
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* Important: Round the size up for the appropriate alignment. This
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* is a requirement on IA64.
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*/
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BufferSize = AcpiGbl_ResourceStructSizes[ResourceIndex] +
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ExtraStructBytes;
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BufferSize = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (BufferSize);
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*SizeNeeded += BufferSize;
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ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES,
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"Type %.2X, AmlLength %.2X InternalLength %.2X\n",
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AcpiUtGetResourceType (AmlBuffer),
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AcpiUtGetDescriptorLength (AmlBuffer), BufferSize));
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/*
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* Point to the next resource within the AML stream using the length
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* contained in the resource descriptor header
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*/
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AmlBuffer += AcpiUtGetDescriptorLength (AmlBuffer);
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}
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/* Did not find an EndTag resource descriptor */
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return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiRsGetPciRoutingTableLength
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*
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* PARAMETERS: PackageObject - Pointer to the package object
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* BufferSizeNeeded - UINT32 pointer of the size buffer
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* needed to properly return the
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* parsed data
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*
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* RETURN: Status
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*
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* DESCRIPTION: Given a package representing a PCI routing table, this
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* calculates the size of the corresponding linked list of
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* descriptions.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiRsGetPciRoutingTableLength (
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ACPI_OPERAND_OBJECT *PackageObject,
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ACPI_SIZE *BufferSizeNeeded)
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{
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UINT32 NumberOfElements;
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ACPI_SIZE TempSizeNeeded = 0;
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ACPI_OPERAND_OBJECT **TopObjectList;
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UINT32 Index;
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ACPI_OPERAND_OBJECT *PackageElement;
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ACPI_OPERAND_OBJECT **SubObjectList;
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BOOLEAN NameFound;
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UINT32 TableIndex;
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ACPI_FUNCTION_TRACE (RsGetPciRoutingTableLength);
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NumberOfElements = PackageObject->Package.Count;
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/*
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* Calculate the size of the return buffer.
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* The base size is the number of elements * the sizes of the
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* structures. Additional space for the strings is added below.
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* The minus one is to subtract the size of the UINT8 Source[1]
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* member because it is added below.
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*
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* But each PRT_ENTRY structure has a pointer to a string and
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* the size of that string must be found.
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*/
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TopObjectList = PackageObject->Package.Elements;
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for (Index = 0; Index < NumberOfElements; Index++)
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{
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/* Dereference the sub-package */
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PackageElement = *TopObjectList;
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/* We must have a valid Package object */
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if (!PackageElement ||
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(PackageElement->Common.Type != ACPI_TYPE_PACKAGE))
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{
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/*
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* The SubObjectList will now point to an array of the
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* four IRQ elements: Address, Pin, Source and SourceIndex
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*/
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SubObjectList = PackageElement->Package.Elements;
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/* Scan the IrqTableElements for the Source Name String */
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NameFound = FALSE;
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|
|
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);
|
|
}
|