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/* $NoKeywords:$ */
/**
* @file
*
* lvddr3.c
*
* Voltage change for DDR3 DIMMs.
*
* @xrefitem bom "File Content Label" "Release Content"
* @e project: AGESA
* @e sub-project: (Mem/Feat/LVDDR3)
*
**/
/*****************************************************************************
*
* Copyright (c) 2008 - 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.
* ***************************************************************************
*
*/
/*
*----------------------------------------------------------------------------
* MODULES USED
*
*----------------------------------------------------------------------------
*/
#include "AGESA.h"
#include "amdlib.h"
#include "Ids.h"
#include "mm.h"
#include "mn.h"
#include "mt.h"
#include "Filecode.h"
CODE_GROUP (G2_PEI)
RDATA_GROUP (G2_PEI)
#define FILECODE PROC_MEM_FEAT_LVDDR3_MFLVDDR3_FILECODE
/* features */
#include "mflvddr3.h"
/*----------------------------------------------------------------------------
* DEFINITIONS AND MACROS
*
*----------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
* TYPEDEFS AND STRUCTURES
*
*----------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
* PROTOTYPES OF LOCAL FUNCTIONS
*
*----------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
* EXPORTED FUNCTIONS
*
*----------------------------------------------------------------------------
*/
/*-----------------------------------------------------------------------------*/
/**
*
* This function calculate the common lowest voltage supported by all DDR3
* DIMMs in the system. This function only needs to be called on BSP.
*
* @param[in, out] *NBPtr - Pointer to NB block
*
* @return TRUE - This feature is enabled.
* @return FALSE - This feature is not enabled.
*/
BOOLEAN
MemFLvDdr3 (
IN OUT MEM_NB_BLOCK *NBPtr
)
{
CH_DEF_STRUCT *ChannelPtr;
MEM_TECH_BLOCK *TechPtr;
MEM_SHARED_DATA *mmSharedPtr;
UINT8 Dct;
UINT8 Channel;
UINT8 Dimm;
UINT8 *SpdBufferPtr;
UINT8 VDDByte;
UINT8 VoltageMap;
mmSharedPtr = NBPtr->SharedPtr;
TechPtr = NBPtr->TechPtr;
VoltageMap = 0xFF;
for (Dct = 0; Dct < NBPtr->DctCount; Dct++) {
NBPtr->SwitchDCT (NBPtr, Dct);
for (Channel = 0; Channel < NBPtr->ChannelCount; Channel++) {
NBPtr->SwitchChannel (NBPtr, Channel);
ChannelPtr = NBPtr->ChannelPtr;
for (Dimm = 0; Dimm < MAX_DIMMS_PER_CHANNEL; Dimm++) {
if (TechPtr->GetDimmSpdBuffer (TechPtr, &SpdBufferPtr, Dimm)) {
// SPD byte 6: Module Nominal Voltage, VDD
// 1.5v - bit 0
// 1.35v - bit 1
// 1.2v - bit 2
VDDByte = SpdBufferPtr[MNVVDD];
IDS_HDT_CONSOLE (MEM_FLOW, "Node%d DCT%d Channel%d Dimm%d VDD Byte: 0x%02x\n", NBPtr->Node, Dct, Channel, Dimm, VDDByte);
// Reverse the 1.5V operable bit. So its encoding can be consistent
// with that of 1.35V and 1.25V operable bit.
VDDByte ^= 1;
ASSERT (VDDByte != 0);
if (mmSharedPtr->VoltageMap != 0) {
// Get the common supported voltage map
VoltageMap &= VDDByte;
} else {
// This is the second execution of all the loop as no common voltage is found
if (VDDByte == (1 << VOLT1_5_ENCODED_VAL)) {
// Always exclude 1.5V dimm if no common voltage is found
ChannelPtr->DimmExclude |= (UINT16) 1 << Dimm;
}
}
}
}
if (mmSharedPtr->VoltageMap == 0) {
NBPtr->DCTPtr->Timings.DimmExclude |= ChannelPtr->DimmExclude;
}
}
}
if (mmSharedPtr->VoltageMap != 0) {
mmSharedPtr->VoltageMap &= VoltageMap;
}
return TRUE;
}
/*----------------------------------------------------------------------------
* LOCAL FUNCTIONS
*
*----------------------------------------------------------------------------
*/
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