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/* $NoKeywords:$ */
/**
* @file
*
* SubLink management Routines.
*
* Contains routines for subLink frequency ratios.
*
* @xrefitem bom "File Content Label" "Release Content"
* @e project: AGESA
* @e sub-project: HyperTransport
* @e \$Revision: 44324 $ @e \$Date: 2010-12-22 17:16:51 +0800 (Wed, 22 Dec 2010) $
*
*/
/*
*****************************************************************************
*
* Copyright (c) 2011, 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.
* ***************************************************************************
*
*/
/*
*----------------------------------------------------------------------------
* MODULES USED
*
*----------------------------------------------------------------------------
*/
#include "AGESA.h"
#include "Ids.h"
#include "amdlib.h"
#include "Topology.h"
#include "htFeat.h"
#include "IdsHt.h"
#include "htFeatSublinks.h"
#include "Filecode.h"
CODE_GROUP (G1_PEICC)
RDATA_GROUP (G1_PEICC)
#define FILECODE PROC_HT_FEATURES_HTFEATSUBLINKS_FILECODE
/*----------------------------------------------------------------------------
* DEFINITIONS AND MACROS
*
*----------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
* TYPEDEFS AND STRUCTURES
*
*----------------------------------------------------------------------------
*/
typedef struct {
UINT8 HiFreq;
UINT8 LoFreq;
} VALID_RATIO_ITEM;
STATIC CONST VALID_RATIO_ITEM ROMDATA ValidRatioList[] =
{
{HT_FREQUENCY_3200M, HT_FREQUENCY_1600M}, // 3200MHz / 1600MHz 2:1
{HT_FREQUENCY_3200M, HT_FREQUENCY_800M}, // 3200MHz / 800MHz 4:1
{HT_FREQUENCY_3200M, HT_FREQUENCY_400M}, // 3200MHz / 400MHz 8:1
{HT_FREQUENCY_2800M, HT_FREQUENCY_1400M}, // 2800MHz / 1400MHz 2:1
{HT_FREQUENCY_2400M, HT_FREQUENCY_1200M}, // 2400MHz / 1200MHz 2:1
{HT_FREQUENCY_2400M, HT_FREQUENCY_600M}, // 2400MHz / 600MHz 4:1
{HT_FREQUENCY_2400M, HT_FREQUENCY_400M}, // 2400MHz / 400MHz 6:1
{HT_FREQUENCY_2000M, HT_FREQUENCY_1000M}, // 2000MHz / 1000MHz 2:1
{HT_FREQUENCY_1600M, HT_FREQUENCY_800M}, // 1600MHz / 800MHz 2:1
{HT_FREQUENCY_1600M, HT_FREQUENCY_400M}, // 1600MHz / 400MHz 4:1
{HT_FREQUENCY_1600M, HT_FREQUENCY_200M}, // 1600MHz / 200Mhz 8:1
{HT_FREQUENCY_1200M, HT_FREQUENCY_600M}, // 1200MHz / 600MHz 2:1
{HT_FREQUENCY_1200M, HT_FREQUENCY_200M}, // 1200MHz / 200MHz 6:1
{HT_FREQUENCY_800M, HT_FREQUENCY_400M}, // 800MHz / 400MHz 2:1
{HT_FREQUENCY_800M, HT_FREQUENCY_200M}, // 800MHz / 200MHz 4:1
{HT_FREQUENCY_400M, HT_FREQUENCY_200M} // 400MHz / 200MHz 2:1
};
/*----------------------------------------------------------------------------
* PROTOTYPES OF LOCAL FUNCTIONS
*
*----------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
* EXPORTED FUNCTIONS
*
*----------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
* LOCAL FUNCTIONS
*
*----------------------------------------------------------------------------
*/
/***************************************************************************
*** Link Optimization ***
***************************************************************************/
/*----------------------------------------------------------------------------------------*/
/**
* Iterate through all Links, checking the frequency of each subLink pair.
*
* @HtFeatMethod{::F_SUBLINK_RATIO_FIXUP}
*
* Make the adjustment to the port list data so that the frequencies
* are at a valid ratio, reducing frequency as needed to achieve
* this. (All Links support the minimum 200 MHz frequency.) Repeat
* the above until no adjustments are needed.
* @note no hardware state changes in this routine.
*
* @param[in,out] State Link state and port list
*
*/
VOID
SubLinkRatioFixup (
IN OUT STATE_DATA *State
)
{
UINT8 i;
UINT8 j;
UINT8 ValidRatioItem;
BOOLEAN Changes;
BOOLEAN Downgrade;
UINT8 HiIndex;
UINT8 HiFreq;
UINT8 LoFreq;
UINT32 Temp;
do {
Changes = FALSE;
for (i = 0; i < State->TotalLinks*2; i++) {
// Must be a CPU Link
if ((*State->PortList)[i].Type != PORTLIST_TYPE_CPU) {
continue;
}
// Only look for subLink1's
if ((*State->PortList)[i].Link < 4) {
continue;
}
for (j = 0; j < State->TotalLinks*2; j++) {
// Step 1. Find the matching subLink0
if ((*State->PortList)[j].Type != PORTLIST_TYPE_CPU) {
continue;
}
if ((*State->PortList)[j].NodeID != (*State->PortList)[i].NodeID) {
continue;
}
if ((*State->PortList)[j].Link != ((*State->PortList)[i].Link & 0x03)) {
continue;
}
// Step 2. Check for an illegal frequency ratio
if ((*State->PortList)[i].SelFrequency >= (*State->PortList)[j].SelFrequency) {
HiIndex = i;
HiFreq = (*State->PortList)[i].SelFrequency;
LoFreq = (*State->PortList)[j].SelFrequency;
} else {
HiIndex = j;
HiFreq = (*State->PortList)[j].SelFrequency;
LoFreq = (*State->PortList)[i].SelFrequency;
}
// The frequencies are 1:1, no need to do anything
if (HiFreq == LoFreq) {
break;
}
Downgrade = TRUE;
for (ValidRatioItem = 0; ValidRatioItem < (sizeof (ValidRatioList) / sizeof (VALID_RATIO_ITEM)); ValidRatioItem++) {
if ((HiFreq == ValidRatioList[ValidRatioItem].HiFreq) &&
(LoFreq == ValidRatioList[ValidRatioItem].LoFreq)) {
Downgrade = FALSE;
break;
}
}
// Step 3. Downgrade the higher of the two frequencies, and set Changes to FALSE
if (Downgrade) {
// Although the problem was with the port specified by hiIndex, we need to
// Downgrade both ends of the Link.
HiIndex = HiIndex & 0xFE; // Select the 'upstream' (i.e. even) port
Temp = (*State->PortList)[HiIndex].CompositeFrequencyCap;
// Remove HiFreq from the list of valid frequencies
Temp = Temp & ~((UINT32)1 << HiFreq);
ASSERT (Temp != 0);
(*State->PortList)[HiIndex].CompositeFrequencyCap = (UINT32)Temp;
(*State->PortList)[HiIndex + 1].CompositeFrequencyCap = (UINT32)Temp;
HiFreq = LibAmdBitScanReverse (Temp);
(*State->PortList)[HiIndex].SelFrequency = HiFreq;
(*State->PortList)[HiIndex + 1].SelFrequency = HiFreq;
Changes = TRUE;
}
}
}
} while (Changes); // Repeat until a valid configuration is reached
}
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