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Function to get the mem. size in bytes

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Éder F. Zulian
2016-11-09 17:10:50 +01:00
parent bc1a957a63
commit f9555acc32
3 changed files with 21 additions and 13 deletions
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18
DRAMSys/simulator/src/controller/core/configuration/Configuration.cpp
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@@ -226,3 +226,21 @@ void Configuration::setParameters(std::map<std::string, std::string> parameterMa
}
}
// Returns the total memory size in bytes
unsigned int Configuration::getSimMemSizeInBytes()
{
// 1. Get number of banks, rows, columns and data width in bits for one die (or chip)
unsigned int banks = memSpec.NumberOfBanks;
unsigned int rows = memSpec.NumberOfRows;
unsigned int columns = memSpec.NumberOfColumns;
unsigned int bitWidth = memSpec.bitWidth;
// 2. Calculate size of one DRAM chip in bits
unsigned int chipBitSize = banks * rows * columns * bitWidth;
// 3. Calculate size of one DRAM chip in bytes
unsigned int chipSize = chipBitSize / 8;
// 4. Total memory size in Bytes of one DIMM (with only support of 1 rank on a DIMM)
unsigned int memorySize = chipSize * NumberOfDevicesOnDIMM;
return memorySize;
}

2
DRAMSys/simulator/src/controller/core/configuration/Configuration.h
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@@ -100,6 +100,8 @@ struct Configuration
// Temperature Simulation related
TemperatureSimConfig temperatureSim;
unsigned int getSimMemSizeInBytes();
private:
Configuration();
unsigned int powerDownTimeoutInClk = 3;

14
DRAMSys/simulator/src/simulation/Dram.h
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@@ -98,19 +98,7 @@ struct Dram : sc_module
SC_CTOR(Dram) : tSocket("socket")
{
// calculate memory size (in Bytes)
// 1. Get number of banks, rows, columns and data width in bits
unsigned int banks = Configuration::getInstance().memSpec.NumberOfBanks;
unsigned int rows = Configuration::getInstance().memSpec.NumberOfRows;
unsigned int columns = Configuration::getInstance().memSpec.NumberOfColumns;
unsigned int bitWidth = Configuration::getInstance().memSpec.bitWidth;
// 2. Calculate size of one DRAM chip in bits
unsigned int chipBitSize = banks * rows * columns * bitWidth;
// 3. Calculate size of one DRAM chip in bytes
unsigned int chipSize = chipBitSize / 8;
// 4. Total memory size in Bytes of one DIMM (with only support of 1 rank on a DIMM)
unsigned int memorySize = chipSize * Configuration::getInstance().NumberOfDevicesOnDIMM;
unsigned int memorySize = Configuration::getInstance().getSimMemSizeInBytes();
// allocate and model storage of one DRAM channel using memory map
memory = (unsigned char *)mmap(NULL, memorySize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, -1, 0);