/*******************************************************************************
*
* Module Name: rslist - Linked list utilities
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2019, Intel Corp.
* All rights reserved.
*
* 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.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* 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 MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*/
#include "acpi.h"
#include "accommon.h"
#include "acresrc.h"
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME ("rslist")
/*******************************************************************************
*
* FUNCTION: AcpiRsConvertAmlToResources
*
* PARAMETERS: ACPI_WALK_AML_CALLBACK
* ResourcePtr - Pointer to the buffer that will
* contain the output structures
*
* RETURN: Status
*
* DESCRIPTION: Convert an AML resource to an internal representation of the
* resource that is aligned and easier to access.
*
******************************************************************************/
ACPI_STATUS
AcpiRsConvertAmlToResources (
UINT8 *Aml,
UINT32 Length,
UINT32 Offset,
UINT8 ResourceIndex,
void **Context)
{
ACPI_RESOURCE **ResourcePtr = ACPI_CAST_INDIRECT_PTR (
ACPI_RESOURCE, Context);
ACPI_RESOURCE *Resource;
AML_RESOURCE *AmlResource;
ACPI_RSCONVERT_INFO *ConversionTable;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (RsConvertAmlToResources);
/*
* Check that the input buffer and all subsequent pointers into it
* are aligned on a native word boundary. Most important on IA64
*/
Resource = *ResourcePtr;
if (ACPI_IS_MISALIGNED (Resource))
{
ACPI_WARNING ((AE_INFO,
"Misaligned resource pointer %p", Resource));
}
/* Get the appropriate conversion info table */
AmlResource = ACPI_CAST_PTR (AML_RESOURCE, Aml);
if (AcpiUtGetResourceType (Aml) ==
ACPI_RESOURCE_NAME_SERIAL_BUS)
{
if (AmlResource->CommonSerialBus.Type >
AML_RESOURCE_MAX_SERIALBUSTYPE)
{
ConversionTable = NULL;
}
else
{
/* This is an I2C, SPI, or UART SerialBus descriptor */
ConversionTable = AcpiGbl_ConvertResourceSerialBusDispatch [
AmlResource->CommonSerialBus.Type];
}
}
else
{
ConversionTable = AcpiGbl_GetResourceDispatch[ResourceIndex];
}
if (!ConversionTable)
{
ACPI_ERROR ((AE_INFO,
"Invalid/unsupported resource descriptor: Type 0x%2.2X",
ResourceIndex));
return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
}
/* Convert the AML byte stream resource to a local resource struct */
Status = AcpiRsConvertAmlToResource (
Resource, AmlResource, ConversionTable);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not convert AML resource (Type 0x%X)", *Aml));
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES,
"Type %.2X, AmlLength %.2X InternalLength %.2X\n",
AcpiUtGetResourceType (Aml), Length,
Resource->Length));
/* Point to the next structure in the output buffer */
*ResourcePtr = ACPI_NEXT_RESOURCE (Resource);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiRsConvertResourcesToAml
*
* PARAMETERS: Resource - Pointer to the resource linked list
* AmlSizeNeeded - Calculated size of the byte stream
* needed from calling AcpiRsGetAmlLength()
* The size of the OutputBuffer is
* guaranteed to be >= AmlSizeNeeded
* OutputBuffer - Pointer to the buffer that will
* contain the byte stream
*
* RETURN: Status
*
* DESCRIPTION: Takes the resource linked list and parses it, creating a
* byte stream of resources in the caller's output buffer
*
******************************************************************************/
ACPI_STATUS
AcpiRsConvertResourcesToAml (
ACPI_RESOURCE *Resource,
ACPI_SIZE AmlSizeNeeded,
UINT8 *OutputBuffer)
{
UINT8 *Aml = OutputBuffer;
UINT8 *EndAml = OutputBuffer + AmlSizeNeeded;
ACPI_RSCONVERT_INFO *ConversionTable;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (RsConvertResourcesToAml);
/* Walk the resource descriptor list, convert each descriptor */
while (Aml < EndAml)
{
/* Validate the (internal) Resource Type */
if (Resource->Type > ACPI_RESOURCE_TYPE_MAX)
{
ACPI_ERROR ((AE_INFO,
"Invalid descriptor type (0x%X) in resource list",
Resource->Type));
return_ACPI_STATUS (AE_BAD_DATA);
}
/* Sanity check the length. It must not be zero, or we loop forever */
if (!Resource->Length)
{
ACPI_ERROR ((AE_INFO,
"Invalid zero length descriptor in resource list\n"));
return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
}
/* Perform the conversion */
if (Resource->Type == ACPI_RESOURCE_TYPE_SERIAL_BUS)
{
if (Resource->Data.CommonSerialBus.Type >
AML_RESOURCE_MAX_SERIALBUSTYPE)
{
ConversionTable = NULL;
}
else
{
/* This is an I2C, SPI, or UART SerialBus descriptor */
ConversionTable = AcpiGbl_ConvertResourceSerialBusDispatch[
Resource->Data.CommonSerialBus.Type];
}
}
else
{
ConversionTable = AcpiGbl_SetResourceDispatch[Resource->Type];
}
if (!ConversionTable)
{
ACPI_ERROR ((AE_INFO,
"Invalid/unsupported resource descriptor: Type 0x%2.2X",
Resource->Type));
return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
}
Status = AcpiRsConvertResourceToAml (Resource,
ACPI_CAST_PTR (AML_RESOURCE, Aml), ConversionTable);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not convert resource (type 0x%X) to AML",
Resource->Type));
return_ACPI_STATUS (Status);
}
/* Perform final sanity check on the new AML resource descriptor */
Status = AcpiUtValidateResource (
NULL, ACPI_CAST_PTR (AML_RESOURCE, Aml), NULL);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Check for end-of-list, normal exit */
if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG)
{
/* An End Tag indicates the end of the input Resource Template */
return_ACPI_STATUS (AE_OK);
}
/*
* Extract the total length of the new descriptor and set the
* Aml to point to the next (output) resource descriptor
*/
Aml += AcpiUtGetDescriptorLength (Aml);
/* Point to the next input resource descriptor */
Resource = ACPI_NEXT_RESOURCE (Resource);
}
/* Completed buffer, but did not find an EndTag resource descriptor */
return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
}