Frank Vibrans | 2b4c831 | 2011-02-14 18:30:54 +0000 | [diff] [blame] | 1 | /* $NoKeywords:$ */ |
| 2 | /** |
| 3 | * @file |
| 4 | * |
| 5 | * lvddr3.c |
| 6 | * |
| 7 | * Voltage change for DDR3 DIMMs. |
| 8 | * |
| 9 | * @xrefitem bom "File Content Label" "Release Content" |
| 10 | * @e project: AGESA |
| 11 | * @e sub-project: (Mem/Feat/LVDDR3) |
| 12 | * @e \$Revision: 35136 $ @e \$Date: 2010-07-16 11:29:48 +0800 (Fri, 16 Jul 2010) $ |
| 13 | * |
| 14 | **/ |
| 15 | /* |
| 16 | ***************************************************************************** |
| 17 | * |
| 18 | * Copyright (c) 2011, Advanced Micro Devices, Inc. |
| 19 | * All rights reserved. |
Edward O'Callaghan | 1542a6f | 2014-07-06 19:24:06 +1000 | [diff] [blame] | 20 | * |
Frank Vibrans | 2b4c831 | 2011-02-14 18:30:54 +0000 | [diff] [blame] | 21 | * Redistribution and use in source and binary forms, with or without |
| 22 | * modification, are permitted provided that the following conditions are met: |
| 23 | * * Redistributions of source code must retain the above copyright |
| 24 | * notice, this list of conditions and the following disclaimer. |
| 25 | * * Redistributions in binary form must reproduce the above copyright |
| 26 | * notice, this list of conditions and the following disclaimer in the |
| 27 | * documentation and/or other materials provided with the distribution. |
Edward O'Callaghan | 1542a6f | 2014-07-06 19:24:06 +1000 | [diff] [blame] | 28 | * * Neither the name of Advanced Micro Devices, Inc. nor the names of |
| 29 | * its contributors may be used to endorse or promote products derived |
Frank Vibrans | 2b4c831 | 2011-02-14 18:30:54 +0000 | [diff] [blame] | 30 | * from this software without specific prior written permission. |
Edward O'Callaghan | 1542a6f | 2014-07-06 19:24:06 +1000 | [diff] [blame] | 31 | * |
Frank Vibrans | 2b4c831 | 2011-02-14 18:30:54 +0000 | [diff] [blame] | 32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| 33 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 34 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 35 | * DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY |
| 36 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 37 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 38 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 39 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 40 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 41 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Edward O'Callaghan | 1542a6f | 2014-07-06 19:24:06 +1000 | [diff] [blame] | 42 | * |
Frank Vibrans | 2b4c831 | 2011-02-14 18:30:54 +0000 | [diff] [blame] | 43 | * *************************************************************************** |
| 44 | * |
| 45 | */ |
| 46 | |
| 47 | /* |
| 48 | *---------------------------------------------------------------------------- |
| 49 | * MODULES USED |
| 50 | * |
| 51 | *---------------------------------------------------------------------------- |
| 52 | */ |
| 53 | |
| 54 | |
| 55 | |
| 56 | #include "AGESA.h" |
| 57 | #include "amdlib.h" |
| 58 | #include "Ids.h" |
| 59 | #include "mm.h" |
| 60 | #include "mn.h" |
| 61 | #include "mt.h" |
| 62 | #include "Filecode.h" |
| 63 | CODE_GROUP (G2_PEI) |
| 64 | RDATA_GROUP (G2_PEI) |
| 65 | |
| 66 | #define FILECODE PROC_MEM_FEAT_LVDDR3_MFLVDDR3_FILECODE |
| 67 | /* features */ |
| 68 | #include "mflvddr3.h" |
| 69 | |
| 70 | |
| 71 | /*---------------------------------------------------------------------------- |
| 72 | * DEFINITIONS AND MACROS |
| 73 | * |
| 74 | *---------------------------------------------------------------------------- |
| 75 | */ |
| 76 | |
| 77 | /*---------------------------------------------------------------------------- |
| 78 | * TYPEDEFS AND STRUCTURES |
| 79 | * |
| 80 | *---------------------------------------------------------------------------- |
| 81 | */ |
| 82 | |
| 83 | /*---------------------------------------------------------------------------- |
| 84 | * PROTOTYPES OF LOCAL FUNCTIONS |
| 85 | * |
| 86 | *---------------------------------------------------------------------------- |
| 87 | */ |
| 88 | |
| 89 | /*---------------------------------------------------------------------------- |
| 90 | * EXPORTED FUNCTIONS |
| 91 | * |
| 92 | *---------------------------------------------------------------------------- |
| 93 | */ |
| 94 | |
| 95 | /*-----------------------------------------------------------------------------*/ |
| 96 | /** |
| 97 | * |
| 98 | * This function calculate the common lowest voltage supported by all DDR3 |
| 99 | * DIMMs in the system. This function only needs to be called on BSP. |
| 100 | * |
| 101 | * @param[in, out] *NBPtr - Pointer to NB block |
| 102 | * |
| 103 | * @return TRUE - This feature is enabled. |
| 104 | * @return FALSE - This feature is not enabled. |
| 105 | */ |
| 106 | |
| 107 | BOOLEAN |
| 108 | MemFLvDdr3 ( |
| 109 | IN OUT MEM_NB_BLOCK *NBPtr |
| 110 | ) |
| 111 | { |
| 112 | CH_DEF_STRUCT *ChannelPtr; |
| 113 | MEM_TECH_BLOCK *TechPtr; |
| 114 | MEM_SHARED_DATA *mmSharedPtr; |
| 115 | UINT8 Dct; |
| 116 | UINT8 Channel; |
| 117 | UINT8 Dimm; |
| 118 | UINT8 *SpdBufferPtr; |
| 119 | UINT8 VDDByte; |
| 120 | UINT8 VoltageMap; |
| 121 | |
| 122 | mmSharedPtr = NBPtr->SharedPtr; |
| 123 | TechPtr = NBPtr->TechPtr; |
| 124 | VoltageMap = 0xFF; |
| 125 | |
| 126 | for (Dct = 0; Dct < NBPtr->DctCount; Dct++) { |
| 127 | NBPtr->SwitchDCT (NBPtr, Dct); |
| 128 | for (Channel = 0; Channel < NBPtr->ChannelCount; Channel++) { |
| 129 | NBPtr->SwitchChannel (NBPtr, Channel); |
| 130 | ChannelPtr = NBPtr->ChannelPtr; |
| 131 | for (Dimm = 0; Dimm < MAX_DIMMS_PER_CHANNEL; Dimm++) { |
| 132 | if (TechPtr->GetDimmSpdBuffer (TechPtr, &SpdBufferPtr, Dimm)) { |
| 133 | // SPD byte 6: Module Nominal Voltage, VDD |
| 134 | // 1.5v - bit 0 |
| 135 | // 1.35v - bit 1 |
| 136 | // 1.2v - bit 2 |
| 137 | VDDByte = SpdBufferPtr[MNVVDD]; |
| 138 | // Reverse the 1.5V operable bit. So its encoding can be consistent |
| 139 | // with that of 1.35V and 1.25V operable bit. |
| 140 | VDDByte ^= 1; |
| 141 | ASSERT (VDDByte != 0); |
| 142 | |
| 143 | if (mmSharedPtr->VoltageMap != 0) { |
| 144 | // Get the common supported voltage map |
| 145 | VoltageMap &= VDDByte; |
| 146 | } else { |
| 147 | // This is the second execution of all the loop as no common voltage is found |
| 148 | if (VDDByte == (1 << VOLT1_5)) { |
| 149 | // Always exclude 1.5V dimm if no common voltage is found |
| 150 | ChannelPtr->DimmExclude |= (UINT16) 1 << Dimm; |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | } |
| 155 | if (mmSharedPtr->VoltageMap == 0) { |
| 156 | NBPtr->DCTPtr->Timings.DimmExclude |= ChannelPtr->DimmExclude; |
| 157 | } |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | if (mmSharedPtr->VoltageMap != 0) { |
| 162 | mmSharedPtr->VoltageMap &= VoltageMap; |
| 163 | } |
| 164 | |
| 165 | return TRUE; |
| 166 | } |
| 167 | |
| 168 | /*---------------------------------------------------------------------------- |
| 169 | * LOCAL FUNCTIONS |
| 170 | * |
| 171 | *---------------------------------------------------------------------------- |
| 172 | */ |