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/**
* @file
*
* ACPI common library
*
*
*
* @xrefitem bom "File Content Label" "Release Content"
* @e project: Common Library
* @e sub-project:
* @e \$Revision:$ @e \$Date:$
*
*/
/*****************************************************************************
*
* Copyright (C) 2012 Advanced Micro Devices, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Advanced Micro Devices, Inc. nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
***************************************************************************/
/*----------------------------------------------------------------------------------------
* M O D U L E S U S E D
*----------------------------------------------------------------------------------------
*/
#include "AGESA.h"
#include "amdAcpiLib.h"
#include "amdAcpiMadt.h"
/*----------------------------------------------------------------------------------------
* D E F I N I T I O N S A N D M A C R O S
*----------------------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------------------
* T Y P E D E F S A N D S T R U C T U R E S
*----------------------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------------------
* P R O T O T Y P E S O F L O C A L F U N C T I O N S
*----------------------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------------------
* E X P O R T E D F U N C T I O N S
*----------------------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------------------*/
/**
* Get first block entry in an IVRS (IOMMU) table
*
*
*
* @param[in] StructureType Type of structure entry to find (APIC = 1, 0xFF = next structure)
* @param[in] MadtPtr Pointer to MADT ACPI table
*
*/
VOID*
LibAmdGetFirstMadtStructure (
IN UINT8 StructureType,
IN VOID *MadtPtr
)
{
// Start at MADT pointer + 48 (48 is always the size of IVRS header)
UINT8* BlockPtr;
// If our pointer is not to an IVRS, return error
// if (((DESCRIPTION_HEADER*)MadtPtr)->Signature != 'CIPA') {
if (((DESCRIPTION_HEADER*)MadtPtr)->Signature != Int32FromChar ('C', 'I', 'P', 'A')) {
return NULL;
}
BlockPtr = (UINT8*)MadtPtr + 44;
// Search each entry incrementing by it's size field in offset 2 until
// we reach the end of the IVRS
do {
if (*BlockPtr == StructureType) {
return BlockPtr;
}
BlockPtr += *(BlockPtr + 1);
} while (BlockPtr < (UINT8*)MadtPtr + ((DESCRIPTION_HEADER*)MadtPtr)->Length);
return NULL;
}
/*----------------------------------------------------------------------------------------*/
/**
* Get next block entry in an IVRS (IOMMU) table
*
*
*
* @param[in] StructureType Type of structure entry to find (APIC = 1, ..., 0xFF = next structure)
* @param[in] CurrentStructurePtr Pointer to current structure in IVRS
* @param[in] MadtPtr Pointer to MADT ACPI table
*
*/
VOID*
LibAmdGetNextMadtStructure (
IN UINT8 StructureType,
IN VOID *CurrentStructurePtr,
IN VOID *MadtPtr
)
{
UINT8 *BlockPtr;
BlockPtr = (UINT8*)CurrentStructurePtr + (*(UINT8*) ((UINT8*)CurrentStructurePtr + 1));
// If our pointer is not to an IVRS, return error
// if (((DESCRIPTION_HEADER*)MadtPtr)->Signature != 'CIPA') {
if (((DESCRIPTION_HEADER*)MadtPtr)->Signature != Int32FromChar ('C', 'I', 'P', 'A')) {
return NULL;
}
// Search each entry incrementing by it's size field in offset 2 until
// we reach the end of the IVRS
while (BlockPtr < ((UINT8*)MadtPtr + ((DESCRIPTION_HEADER*)MadtPtr)->Length)) {
if (*BlockPtr == StructureType) {
return BlockPtr;
}
BlockPtr += *(BlockPtr + 1);
}
return NULL;
}
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