riscv/rocket-chip
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add FPGA test bench

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The memory models now support back pressure on the response.
This commit is contained in:
Andrew Waterman
2013-05-02 04:58:43 -07:00
parent d2e1828714
commit cfa86dba4f
11 changed files with 87 additions and 72 deletions
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18
csrc/mm.h
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@ -1,17 +1,19 @@
#ifndef MM_EMULATOR_H
#define MM_EMULATOR_H
#include "mm_param.h"
#include <stdint.h>
#include <cstring>
#include <queue>
const int LINE_SIZE = 64; // all cores assume this.
const size_t MEM_SIZE = (sizeof(long) > 4 ? 4L : 1L) * 1024*1024*1024;
class mm_t
{
public:
mm_t() : data(0), size(0) {}
virtual void init(size_t sz);
virtual void init(size_t sz, int word_size, int line_size);
virtual bool req_cmd_ready() = 0;
virtual bool req_data_ready() = 0;
@ -26,17 +28,22 @@ class mm_t
uint64_t req_cmd_addr,
uint64_t req_cmd_tag,
bool req_data_val,
void* req_data_bits
void* req_data_bits,
bool resp_rdy
) = 0;
virtual void* get_data() { return data; }
virtual size_t get_size() { return size; }
virtual size_t get_word_size() { return word_size; }
virtual size_t get_line_size() { return line_size; }
virtual ~mm_t();
protected:
char* data;
size_t size;
int word_size;
int line_size;
};
class mm_magic_t : public mm_t
@ -44,7 +51,7 @@ class mm_magic_t : public mm_t
public:
mm_magic_t() : store_inflight(false), store_count(0) {}
virtual void init(size_t sz);
virtual void init(size_t sz, int word_size, int line_size);
virtual bool req_cmd_ready() { return !store_inflight; }
virtual bool req_data_ready() { return store_inflight; }
@ -59,7 +66,8 @@ class mm_magic_t : public mm_t
uint64_t req_cmd_addr,
uint64_t req_cmd_tag,
bool req_data_val,
void* req_data_bits
void* req_data_bits,
bool resp_rdy
);
protected: