diff options
Diffstat (limited to 'src/vendorcode/amd/agesa/f14/Proc/Mem/Feat/LVDDR3/mflvddr3.c')
| -rw-r--r-- | src/vendorcode/amd/agesa/f14/Proc/Mem/Feat/LVDDR3/mflvddr3.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/src/vendorcode/amd/agesa/f14/Proc/Mem/Feat/LVDDR3/mflvddr3.c b/src/vendorcode/amd/agesa/f14/Proc/Mem/Feat/LVDDR3/mflvddr3.c new file mode 100644 index 0000000000..bf503bff7d --- /dev/null +++ b/src/vendorcode/amd/agesa/f14/Proc/Mem/Feat/LVDDR3/mflvddr3.c @@ -0,0 +1,172 @@ +/* $NoKeywords:$ */ +/** + * @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: 35136 $ @e \$Date: 2010-07-16 11:29:48 +0800 (Fri, 16 Jul 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 "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]; + // 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)) { + // 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 + * + *---------------------------------------------------------------------------- + */ |