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Add fix for LP5 rank2rank timings.

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This commit is contained in:
Lukas Steiner
2023-03-20 16:51:36 +01:00
parent 7621ac4a1d
commit bb99b9e883
2 changed files with 68 additions and 10 deletions
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6
extensions/standards/LPDDR5/DRAMSys/configuration/memspec/MemSpecLPDDR5.h
View File

@@ -62,14 +62,16 @@ public:
const sc_core::sc_time tRRD;
//const sc_core::sc_time tCCD;
const sc_core::sc_time tRL;
//const sc_core::sc_time tRPST;
const sc_core::sc_time tRPRE;
const sc_core::sc_time tRPST;
//const sc_core::sc_time tDQSCK;
const sc_core::sc_time tRBTP;
const sc_core::sc_time tWL;
//const sc_core::sc_time tDQSS;
//const sc_core::sc_time tDQS2DQ;
const sc_core::sc_time tWR;
//const sc_core::sc_time tWPRE;
const sc_core::sc_time tWPRE;
const sc_core::sc_time tWPST;
//const sc_core::sc_time tWTR;
//const sc_core::sc_time tXP;
//const sc_core::sc_time tSR;

72
extensions/standards/LPDDR5/DRAMSys/controller/checker/CheckerLPDDR5.cpp
View File

@@ -122,9 +122,11 @@ sc_time CheckerLPDDR5::timeToSatisfyConstraints(Command command, const tlm_gener
if (lastCommandStart != sc_max_time())
{
if (lastBurstLengthByCommand[Command::RD] == 32)
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + tBURST32 + memSpec->tRTRS);
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + memSpec->BL_n_min_32
+ memSpec->tCK + memSpec->tRPST + memSpec->tRPRE);
else
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + tBURST16 + memSpec->tRTRS);
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + memSpec->BL_n_min_16
+ memSpec->tCK + memSpec->tRPST + memSpec->tRPRE);
}
lastCommandStart = lastScheduledByCommandAndBankGroup[Command::RDA][bankGroup.ID()];
@@ -157,9 +159,11 @@ sc_time CheckerLPDDR5::timeToSatisfyConstraints(Command command, const tlm_gener
{
// TODO: BG mode with BL32
if (lastBurstLengthByCommand[Command::RDA] == 32)
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + tBURST32 + memSpec->tRTRS);
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + memSpec->BL_n_min_32
+ memSpec->tCK + memSpec->tRPST + memSpec->tRPRE);
else
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + tBURST16 + memSpec->tRTRS);
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + memSpec->BL_n_min_16
+ memSpec->tCK + memSpec->tRPST + memSpec->tRPRE);
}
lastCommandStart = lastScheduledByCommandAndBankGroup[Command::WR][bankGroup.ID()];
@@ -184,6 +188,19 @@ sc_time CheckerLPDDR5::timeToSatisfyConstraints(Command command, const tlm_gener
+ memSpec->BL_n_min_16 + memSpec->tWTR_S);
}
lastCommandStart = lastScheduledByCommand[Command::WR] != lastScheduledByCommandAndRank[Command::WR][rank.ID()] ?
lastScheduledByCommand[Command::WR] : sc_max_time();
if (lastCommandStart != sc_max_time())
{
// TODO: BG mode with BL32
if (lastBurstLengthByCommand[Command::WR] == 32)
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart
+ memSpec->tWL + memSpec->BL_n_min_32 + memSpec->tCK - memSpec->tRL);
else
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart
+ memSpec->tWL + memSpec->BL_n_min_16 + memSpec->tCK - memSpec->tRL);
}
lastCommandStart = lastScheduledByCommandAndBankGroup[Command::WRA][bankGroup.ID()];
if (lastCommandStart != sc_max_time())
{
@@ -205,6 +222,19 @@ sc_time CheckerLPDDR5::timeToSatisfyConstraints(Command command, const tlm_gener
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + memSpec->tWL
+ memSpec->BL_n_min_16 + memSpec->tWTR_S);
}
lastCommandStart = lastScheduledByCommand[Command::WRA] != lastScheduledByCommandAndRank[Command::WRA][rank.ID()] ?
lastScheduledByCommand[Command::WRA] : sc_max_time();
if (lastCommandStart != sc_max_time())
{
// TODO: BG mode with BL32
if (lastBurstLengthByCommand[Command::WRA] == 32)
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart
+ memSpec->tWL + memSpec->BL_n_min_32 + memSpec->tCK - memSpec->tRL);
else
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart
+ memSpec->tWL + memSpec->BL_n_min_16 + memSpec->tCK - memSpec->tRL);
}
}
else if (command == Command::WR || command == Command::WRA)
{
@@ -239,6 +269,19 @@ sc_time CheckerLPDDR5::timeToSatisfyConstraints(Command command, const tlm_gener
+ memSpec->BL_n_min_16 + memSpec->tWCK2DQO - memSpec->tWL);
}
lastCommandStart = lastScheduledByCommand[Command::RD] != lastScheduledByCommandAndRank[Command::RD][rank.ID()] ?
lastScheduledByCommand[Command::RD] : sc_max_time();
if (lastCommandStart != sc_max_time())
{
// TODO: BG mode with BL32
if (lastBurstLengthByCommand[Command::RD] == 32)
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart
+ memSpec->tRL + memSpec->BL_n_min_32 + memSpec->tWCK2DQO + memSpec->tRPST - memSpec->tWL);
else
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart
+ memSpec->tRL + memSpec->BL_n_min_16 + memSpec->tWCK2DQO + memSpec->tRPST - memSpec->tWL);
}
lastCommandStart = lastScheduledByCommandAndBankGroup[Command::RDA][bankGroup.ID()];
if (lastCommandStart != sc_max_time())
{
@@ -261,6 +304,19 @@ sc_time CheckerLPDDR5::timeToSatisfyConstraints(Command command, const tlm_gener
+ memSpec->BL_n_min_16 + memSpec->tWCK2DQO - memSpec->tWL);
}
lastCommandStart = lastScheduledByCommand[Command::RDA] != lastScheduledByCommandAndRank[Command::RDA][rank.ID()] ?
lastScheduledByCommand[Command::RDA] : sc_max_time();
if (lastCommandStart != sc_max_time())
{
// TODO: BG mode with BL32
if (lastBurstLengthByCommand[Command::RDA] == 32)
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart
+ memSpec->tRL + memSpec->BL_n_min_32 + memSpec->tWCK2DQO + memSpec->tRPST - memSpec->tWL);
else
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart
+ memSpec->tRL + memSpec->BL_n_min_16 + memSpec->tWCK2DQO + memSpec->tRPST - memSpec->tWL);
}
lastCommandStart = lastScheduledByCommandAndBankGroup[Command::WR][bankGroup.ID()];
if (lastCommandStart != sc_max_time())
{
@@ -291,9 +347,9 @@ sc_time CheckerLPDDR5::timeToSatisfyConstraints(Command command, const tlm_gener
{
// TODO: BG mode with BL32
if (lastBurstLengthByCommand[Command::WR] == 32)
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + tBURST32 + memSpec->tRTRS);
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + memSpec->BL_n_min_32 + memSpec->tCK);
else
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + tBURST16 + memSpec->tRTRS);
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + memSpec->BL_n_min_16 + memSpec->tCK);
}
lastCommandStart = lastScheduledByCommandAndBankGroup[Command::WRA][bankGroup.ID()];
@@ -325,9 +381,9 @@ sc_time CheckerLPDDR5::timeToSatisfyConstraints(Command command, const tlm_gener
if (lastCommandStart != sc_max_time())
{
if (lastBurstLengthByCommand[Command::WRA] == 32)
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + tBURST32 + memSpec->tRTRS);
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + memSpec->BL_n_min_32 + memSpec->tCK);
else
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + tBURST16 + memSpec->tRTRS);
earliestTimeToStart = std::max(earliestTimeToStart, lastCommandStart + memSpec->BL_n_min_16 + memSpec->tCK);
}
}
else if (command == Command::ACT)