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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 "amdAcpiIvrs.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] IoVirtualizationEntryType Type of IVHD or IVMD entry (IVHD = 0x10, IVMD = 0x20-0x22, any = 0xFF))
* @param[in] Pointer to IVRS ACPI table
*
*/
VOID*
LibAmdGetFirstIvrsBlockEntry (
IN UINT8 IoVirtualizationEntryType,
IN VOID *IvrsPtr
)
{
// Start at IVRS 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*)IvrsPtr)->Signature != 'SRVI') return NULL;
if (((DESCRIPTION_HEADER*)IvrsPtr)->Signature != Int32FromChar ('S', 'R', 'V', 'I')) return NULL;
BlockPtr = (UINT8*)IvrsPtr + 48;
// Search each entry incrementing by it's size field in offset 2 until
// we reach the end of the IVRS
do {
if (*BlockPtr == IoVirtualizationEntryType) {
return BlockPtr;
}
BlockPtr += *((UINT16*) (BlockPtr + 2));
} while (BlockPtr < (UINT8*)IvrsPtr + ((DESCRIPTION_HEADER*)IvrsPtr)->Length);
return NULL;
}
/*----------------------------------------------------------------------------------------*/
/**
* Get next block entry in an IVRS (IOMMU) table
*
*
*
* @param[in] IoVirtualizationEntryType Type of IVHD or IVMD entry (IVHD = 0x10, IVMD = 0x20-0x22, any = 0xFF))
* @param[in] CurrentStructurePtr Pointer to current IVHD or IVMD block in IVRS
* @param[in] IvrsPtr Pointer to IVRS table
*
*/
VOID*
LibAmdGetNextIvrsBlockEntry (
IN UINT8 IoVirtualizationEntryType,
IN VOID* CurrentStructurePtr,
IN VOID* IvrsPtr
)
{
// Start at the current device entry
// Start searching after the current entry
UINT8* BlockPtr;
// If our pointer is not to an IVRS, return error
// if (((DESCRIPTION_HEADER*)IvrsPtr)->Signature != 'SRVI') return NULL;
if (((DESCRIPTION_HEADER*)IvrsPtr)->Signature != Int32FromChar ('S', 'R', 'V', 'I')) return NULL;
BlockPtr = (UINT8*)CurrentStructurePtr + *((UINT16*) ((UINT8*)CurrentStructurePtr + 2));
// Search each entry incrementing by it's size field in offset 2 until
// we reach the end of the IVRS
while (BlockPtr < ((UINT8*)IvrsPtr + ((DESCRIPTION_HEADER*)IvrsPtr)->Length)) {
if (*BlockPtr == IoVirtualizationEntryType) {
return BlockPtr;
}
BlockPtr += *((UINT16*) (BlockPtr + 2));
}
return NULL;
}
/*----------------------------------------------------------------------------------------*/
/**
* Get pointer to first Device Entry of an IVHD
*
*
*
* @param[in] IoVirtualizationEntryType Type of IVHD device entry to search for. (0xFF returns next entry of any type)
* Typical values: 4 byte entries (0-63), 8 byte entries (64-127)
* @param[in] IvhdBlockPtr Pointer to current IVHD block
*
*/
VOID*
LibAmdGetFirstDeviceEntry (
IN UINT8 DeviceEntryType,
IN VOID* IvhdBlockPtr
)
{
// Start at IVHD pointer + 24 (24 is always the size of IVHD header)
// Not much we can do do validate an IVHD input, the only field we know for sure is the type
UINT8 *EntryPtr;
UINT16 IvhdSize;
EntryPtr = (UINT8*)IvhdBlockPtr + 24;
IvhdSize = *(UINT16*) ((UINT8*)IvhdBlockPtr + 2);
// Search each entry incrementing by it's type field until the end of the IVHD
// Types 0-63 are 4 byte size, 64-127 are 8 byte size
do {
if (*EntryPtr == DeviceEntryType) {
return EntryPtr;
}
if (*EntryPtr < 64) {
EntryPtr += 4;
} else if ((*EntryPtr >= 64) && (*EntryPtr < 128)) {
EntryPtr += 8;
} else {
ASSERT (TRUE);
return NULL;
}
} while (EntryPtr < ((UINT8*)IvhdBlockPtr + IvhdSize));
return NULL;
}
/*----------------------------------------------------------------------------------------*/
/**
* Get pointer to Next Device Entry of an IVHD
*
*
*
*
* @param[in] IoVirtualizationEntryType Type of IVHD entry. (0xFF returns next entry of any type)
* Typical values: 4 byte entries (0-63), 8 byte entries (64-127)
* @param[in] CurrentStructurePtr Pointer to current device entry in IVHD block
* @param[in] IvhdBlockPtr Pointer to current IVHD block
*/
VOID*
LibAmdGetNextDeviceEntry (
IN UINT8 DeviceEntryType,
IN VOID* CurrentDeviceEntry,
IN VOID* IvhdBlockPtr
)
{
UINT8 *EntryPtr;
UINT16 IvhdSize;
// Start at IVHD pointer + 24 (24 is always the size of IVHD header)
// Not much we can do do validate an IVHD input, the only field we know for sure is the type
EntryPtr = CurrentDeviceEntry;
if ((*EntryPtr != 0) && (*EntryPtr < 64)) {
EntryPtr += 4;
} else if ((*EntryPtr >= 64) && (*EntryPtr < 128)) {
EntryPtr += 8;
}
IvhdSize = *(UINT16*) ((UINT8*)IvhdBlockPtr + 2);
// Search each entry incrementing by it's type field until the end of the IVHD
// Types 0-63 are 4 byte size, 64-127 are 8 byte size
while (EntryPtr < ((UINT8*)IvhdBlockPtr + IvhdSize)) {
if (*EntryPtr == DeviceEntryType) {
return EntryPtr;
}
if (*EntryPtr < 64) {
EntryPtr += 4;
} else if ((*EntryPtr >= 64) && (*EntryPtr < 128)) {
EntryPtr += 8;
} else {
ASSERT (TRUE);
return NULL;
}
}
return NULL;
}
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