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rocket-chip/csrc/mm_dramsim2.cc

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2014-09-12 19:15:04 +02:00
// See LICENSE for license details.
#include "mm_dramsim2.h"
#include "mm.h"
#include <DRAMSim.h>
#include <iostream>
#include <fstream>
#include <list>
#include <queue>
#include <cstring>
#include <cstdlib>
#include <cassert>
//#define DEBUG_DRAMSIM2
using namespace DRAMSim;
void mm_dramsim2_t::read_complete(unsigned id, uint64_t address, uint64_t clock_cycle)
{
mm_rresp_t resp;
do {
resp = rreq[address].front();
rresp.push(resp);
rreq[address].pop();
} while (!resp.last);
}
void mm_dramsim2_t::write_complete(unsigned id, uint64_t address, uint64_t clock_cycle)
{
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auto b_id = wreq[address].front();
bresp.push(b_id);
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wreq[address].pop();
}
void power_callback(double a, double b, double c, double d)
{
//fprintf(stderr, "power callback: %0.3f, %0.3f, %0.3f, %0.3f\n",a,b,c,d);
}
void mm_dramsim2_t::init(size_t sz, int wsz, int lsz)
{
assert(lsz == 64); // assumed by dramsim2
mm_t::init(sz, wsz, lsz);
dummy_data.resize(word_size);
assert(size % (1024*1024) == 0);
mem = getMemorySystemInstance("DDR3_micron_64M_8B_x4_sg15.ini", "system.ini", "dramsim2_ini", "results", size/(1024*1024));
TransactionCompleteCB *read_cb = new Callback<mm_dramsim2_t, void, unsigned, uint64_t, uint64_t>(this, &mm_dramsim2_t::read_complete);
TransactionCompleteCB *write_cb = new Callback<mm_dramsim2_t, void, unsigned, uint64_t, uint64_t>(this, &mm_dramsim2_t::write_complete);
mem->RegisterCallbacks(read_cb, write_cb, power_callback);
#ifdef DEBUG_DRAMSIM2
fprintf(stderr,"Dramsim2 init successful\n");
#endif
}
void mm_dramsim2_t::tick(
bool ar_valid,
uint64_t ar_addr,
uint64_t ar_id,
uint64_t ar_size,
uint64_t ar_len,
bool aw_valid,
uint64_t aw_addr,
uint64_t aw_id,
uint64_t aw_size,
uint64_t aw_len,
bool w_valid,
uint64_t w_strb,
void *w_data,
bool w_last,
bool r_ready,
bool b_ready)
{
bool ar_fire = ar_valid && ar_ready();
bool aw_fire = aw_valid && aw_ready();
bool w_fire = w_valid && w_ready();
bool r_fire = r_valid() && r_ready;
bool b_fire = b_valid() && b_ready;
if (ar_fire) {
uint64_t start_addr = (ar_addr / word_size) * word_size;
for (int i = 0; i <= ar_len; i++) {
auto dat = read(start_addr + i * word_size);
rreq[ar_addr].push(mm_rresp_t(ar_id, dat, (i == ar_len)));
}
mem->addTransaction(false, ar_addr);
}
if (aw_fire) {
store_addr = aw_addr;
store_id = aw_id;
store_count = aw_len + 1;
store_size = 1 << aw_size;
store_inflight = true;
}
if (w_fire) {
write(store_addr, (uint8_t *) w_data, w_strb, store_size);
store_addr += store_size;
store_count--;
if (store_count == 0) {
store_inflight = false;
mem->addTransaction(true, store_addr);
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wreq[store_addr].push(store_id);
assert(w_last);
}
}
if (b_fire)
bresp.pop();
if (r_fire)
rresp.pop();
mem->update();
cycle++;
}