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/* $NoKeywords:$ */
/**
* @file
*
* FCH IO access common routine
*
*
*
* @xrefitem bom "File Content Label" "Release Content"
* @e project: AGESA
* @e sub-project: FCH
* @e \$Revision$ @e \$Date$
*
*/
/*****************************************************************************
*
* Copyright (c) 2008 - 2016, 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.
*
***************************************************************************/
#include "FchPlatform.h"
#define FILECODE PROC_FCH_COMMON_FCHLIB_FILECODE
/**< FchStall - Reserved */
VOID
FchStall (
IN UINT32 uSec,
IN AMD_CONFIG_PARAMS *StdHeader
)
{
UINT16 timerAddr;
UINT32 startTime;
UINT32 elapsedTime;
LibAmdMemRead (AccessWidth16, (UINT64) (ACPI_MMIO_BASE + PMIO_BASE + FCH_PMIOA_REG64), &timerAddr, StdHeader);
if ( timerAddr == 0 ) {
uSec = uSec / 2;
while ( uSec != 0 ) {
LibAmdIoRead (AccessWidth8, FCHOEM_IO_DELAY_PORT, (UINT8 *) (&startTime), StdHeader);
uSec--;
}
} else {
LibAmdIoRead (AccessWidth32, timerAddr, &startTime, StdHeader);
for ( ;; ) {
LibAmdIoRead (AccessWidth32, timerAddr, &elapsedTime, StdHeader);
if ( elapsedTime < startTime ) {
elapsedTime = elapsedTime + FCH_MAX_TIMER - startTime;
} else {
elapsedTime = elapsedTime - startTime;
}
if ( (elapsedTime * FCHOEM_ELAPSED_TIME_UNIT / FCHOEM_ELAPSED_TIME_DIVIDER) > uSec ) {
break;
}
}
}
}
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