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rocket-chip/csrc/mm_dramsim2.h
Andrew Waterman cfa86dba4f add FPGA test bench
The memory models now support back pressure on the response.
2013-05-02 04:59:32 -07:00

52 lines
1.3 KiB
C++

#ifndef _MM_EMULATOR_DRAMSIM2_H
#define _MM_EMULATOR_DRAMSIM2_H
#include "mm.h"
#include <DRAMSim.h>
#include <map>
#include <queue>
#include <stdint.h>
class mm_dramsim2_t : public mm_t
{
public:
mm_dramsim2_t() : store_inflight(false), store_count(0) {}
virtual void init(size_t sz, int word_size, int line_size);
virtual bool req_cmd_ready() { return mem->willAcceptTransaction() && !store_inflight; }
virtual bool req_data_ready() { return mem->willAcceptTransaction() && store_inflight; }
virtual bool resp_valid() { return !resp.empty(); }
virtual uint64_t resp_tag() { return resp_valid() ? resp.front().first : 0; }
virtual void* resp_data() { return resp_valid() ? &resp.front().second[0] : &dummy_data[0]; }
virtual void tick
(
bool req_cmd_val,
bool req_cmd_store,
uint64_t req_cmd_addr,
uint64_t req_cmd_tag,
bool req_data_val,
void* req_data_bits,
bool resp_rdy
);
protected:
DRAMSim::MultiChannelMemorySystem *mem;
uint64_t cycle;
bool store_inflight;
int store_count;
uint64_t store_addr;
std::vector<char> dummy_data;
std::map<uint64_t,uint64_t> req;
std::queue<std::pair<uint64_t, std::vector<char>>> resp;
void read_complete(unsigned id, uint64_t address, uint64_t clock_cycle);
void write_complete(unsigned id, uint64_t address, uint64_t clock_cycle);
};
#endif