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Draft - bump to DRAMSim3 #274

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Draft - bump to DRAMSim3 #274

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b15ea47
add: first cut bump to dramsim3
jimfangx Apr 24, 2026
1b948d8
add: some todos with sus things to look at
jimfangx Apr 24, 2026
be5358c
add: try to print each memory system requested
jimfangx Jun 9, 2026
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32 changes: 19 additions & 13 deletions src/main/resources/testchipip/csrc/SimDRAM.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -6,12 +6,14 @@
#include <fesvr/memif.h>
#include <fesvr/elfloader.h>

#include "mm_dramsim2.h"
#include "mm_dramsim3.h"

bool use_dramsim = false;
std::string ini_dir = "dramsim2_ini";
std::string dramsim_ini = "DRAMSim3.ini";
std::string dramsim_out = "dramsim-results";
std::string loadmem_file = "";
std::vector<std::map<long long int, backing_data_t>> backing_mem_data = {};
std::map<int, int> chip_id_to_channel_count = {}; // Track which channel number each memory_init call is for

// TODO FIX: This doesn't properly handle striped memory across multiple channels
// The full memory range is duplicated across each channel
Expand All @@ -34,20 +36,23 @@ extern "C" void *memory_init(
mm_t *mm;
s_vpi_vlog_info info;

std::string memory_ini = "DDR3_micron_64M_8B_x4_sg15.ini";
std::string system_ini = "system.ini";
std::string ini_dir = "dramsim2_ini";

if (!vpi_get_vlog_info(&info))
abort();

for (int i = 1; i < info.argc; i++) {
std::string arg(info.argv[i]);

if (arg == "+dramsim")
if (arg == "+dramsim" || arg == "+dramsim3") {
use_dramsim = true;
if (arg.find("+dramsim_ini_dir=") == 0)
ini_dir = arg.substr(strlen("+dramsim_ini_dir="));
}
if (arg.find("+dramsim_ini=") == 0)
dramsim_ini = arg.substr(strlen("+dramsim_ini="));
if (arg.find("+dramsim3_ini=") == 0)
dramsim_ini = arg.substr(strlen("+dramsim3_ini="));
if (arg.find("+dramsim_out=") == 0)
dramsim_out = arg.substr(strlen("+dramsim_out="));
if (arg.find("+dramsim3_out=") == 0)
dramsim_out = arg.substr(strlen("+dramsim3_out="));
if (arg.find("+loadmem=") == 0)
loadmem_file = arg.substr(strlen("+loadmem="));
}
Expand Down Expand Up @@ -84,14 +89,15 @@ extern "C" void *memory_init(
load_elf(loadmem_file.c_str(), &loadmem_memif, &entry, 0);
}

backing_mem_data[chip_id][mem_base] = {data, mem_size};
backing_mem_data[chip_id][mem_base] = {data, (size_t)mem_size};
}

if (use_dramsim)
mm = (mm_t *) (new mm_dramsim2_t(mem_base, mem_size, word_size, line_size,
mm = (mm_t *) (new mm_dramsim3_t(mem_base, mem_size, word_size, line_size,
backing_mem_data[chip_id][mem_base],
memory_ini, system_ini, ini_dir,
1 << id_bits, clock_hz));
dramsim_ini, dramsim_out,
1 << id_bits, clock_hz,
chip_id_to_channel_count[chip_id]++));
else
mm = (mm_t *) (new mm_magic_t(mem_base, mem_size, word_size, line_size,
backing_mem_data[chip_id][mem_base]));
Expand Down
148 changes: 0 additions & 148 deletions src/main/resources/testchipip/csrc/mm_dramsim2.cc
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