| /* $NoKeywords:$ */ |
| /** |
| * @file |
| * |
| * lvddr3.c |
| * |
| * Voltage change for DDR3 DIMMs. |
| * |
| * @xrefitem bom "File Content Label" "Release Content" |
| * @e project: AGESA |
| * @e sub-project: (Mem/Feat/LVDDR3) |
| * @e \$Revision: 84150 $ @e \$Date: 2012-12-12 15:46:25 -0600 (Wed, 12 Dec 2012) $ |
| * |
| **/ |
| /***************************************************************************** |
| * |
| * Copyright (c) 2008 - 2013, 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 |
| * |
| *---------------------------------------------------------------------------- |
| */ |