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279 lines
6.8 KiB
C++

2 years ago
// simple verilator top
// uses a2owb with sim mem interface
#define TRACING
#include <cstddef>
#include <iostream>
#include <fstream>
#include <iomanip>
#include "verilated.h"
#include "Va2owb.h"
// internal nets
#include "Va2owb___024root.h"
#include "Va2owb_a2owb.h"
#include "Va2owb_a2l2wb.h"
#ifdef TRACING
#include "verilated_vcd_c.h"
VerilatedVcdC *t;
#else
unsigned int t = 0;
#endif
/*
#include "uart/uartsim.h"
*/
Va2owb* m;
vluint64_t main_time = 0; // in units of timeprecision used in verilog or --timescale-override
// what is it? it changed to 941621251 after calling loadmem()
double sc_time_stamp() { // $time in verilog
return main_time;
}
const int resetCycle = 10;
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const int threadRunCycle = resetCycle + 5;
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const int runCycles = 500;
const int hbCycles = 500;
const int threads = 1;
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const std::string testFile = "../mem/test1/rom.init";
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// Cythonize this and use it for cocotb too...
class Memory {
std::unordered_map<unsigned int, unsigned int> mem;
public:
bool le;
bool logStores;
int defaultVal;
Memory();
void loadFile(std::string filename, unsigned int adr=0, bool le=false, std::string format="ascii");
int read(unsigned int adr);
void write(unsigned int adr, unsigned int dat);
void write(unsigned int adr, unsigned int be, unsigned int dat);
};
Memory::Memory() {
this->defaultVal = 0;
this->le = false;
this->logStores = true;
}
void Memory::loadFile(std::string filename, unsigned int adr, bool le, std::string format) {
unsigned int dat;
std::ifstream f;
f.open(filename, std::fstream::in);
// "ascii"
//while (f.peek()!=EOF) {
//f >> std::hex >> dat;
// f >> dat;
while (f >> std::hex >> dat) {
this->write(adr, dat);
adr += 4;
}
}
// adr is word-aligned byte address
int Memory::read(unsigned int adr) {
if (this->mem.find(adr) != this->mem.end()) {
return this->mem[adr];
} else {
return this->defaultVal;
}
}
// adr is word-aligned byte address
void Memory::write(unsigned int adr, unsigned int dat) {
unsigned int startDat = this->read(adr);
this->mem[adr] = dat;
if (this->logStores) {
std::cout << std::setw(8) << std::hex << " * Mem Update @" << adr << " " << startDat << "->" << dat << std::endl;
}
}
void Memory::write(unsigned int adr, unsigned int be, unsigned int dat) {
if (be == 0) return;
int mask, startDat;
if (be >= 8) {
be = be - 8;
mask = 0xFF000000;
} else {
mask = 0;
}
if (be >= 4) {
be = be - 4;
mask |= 0x00FF0000;
}
if (be >= 2) {
be = be - 2;
mask |= 0x0000FF00;
}
if (be = 1) {
mask |= 0x000000FF;
}
startDat = this->read(adr);
this->mem[adr] = (startDat & ~mask) | (dat & mask);
if (this->logStores) {
std::cout << std::setw(8) << std::hex << " * Mem Update @" << adr << " " << startDat << "->" << dat << std::endl;
}
}
Memory mem;
int main(int argc, char **argv) {
using namespace std;
cout << setfill('0');
Verilated::commandArgs(argc, argv);
m = new Va2owb;
#ifdef TRACING
Verilated::traceEverOn(true);
t = new VerilatedVcdC;
m->trace(t, 99);
t->open("a2onode.vcd");
cout << "Tracing enabled." << endl;
#endif
bool resetDone = false;
unsigned int threadStop = 0x3;
unsigned int tick = 0;
unsigned int cycle = 1;
unsigned int readPending = 0;
unsigned int readAddr = 0;
unsigned int readTag = 0;
unsigned int readTID = 0;
unsigned int countReads = 0;
//unsigned int iu0Comp = m->rootp->a2owb->c0->iu_lq_i0_completed;
//unsigned int iu0Comp = m->rootp->a2owb__DOT__c0__DOT__lq0__DOT__lsq__DOT__odq__DOT__iu_lq_i0_completed_itag_int;
/*
iu0CompIFAR = sim.a2o.root.iuq0.iuq_cpl_top0.iuq_cpl0.cp2_i0_ifar
iu1Comp = sim.a2o.root.iu_lq_i1_completed
iu1CompIFAR = sim.a2o.root.iuq0.iuq_cpl_top0.iuq_cpl0.cp2_i1_ifar
iuCompFlushIFAR = sim.a2o.root.cp_t0_flush_ifar
cp3NIA = sim.a2o.root.iuq0.iuq_cpl_top0.iuq_cpl0.iuq_cpl_ctrl.cp3_nia_q # nia after last cycle's completions
*/
mem.write(0xFFFFFFFC, 0x48000002);
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mem.loadFile(testFile);
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m->nclk = 0x38;
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cout << dec << setw(8) << cycle << " Resetting..." << endl;
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m->an_ac_pm_thread_stop = threadStop;
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cout << dec << setw(8) << cycle << " Thread stop=" << threadStop << endl;
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const int clocks[4] = {0xA, 0x8, 0x2, 0x0}; // 1x, 2x
const int ticks1x = 4;
while (!Verilated::gotFinish()) {
if (!resetDone && (cycle > resetCycle)) {
m->nclk &= 0x2F;
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cout << dec << setw(8) << cycle << " Releasing reset." << endl;
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resetDone = true;
}
if (threadStop && (cycle > threadRunCycle)) {
threadStop = 0x0;
m->an_ac_pm_thread_stop = threadStop;
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cout << dec << setw(8) << cycle << " Thread stop=" << threadStop << endl;
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}
m->nclk = (m->nclk & 0x10) | (clocks[tick % ticks1x] << 2);
tick++;
m->eval();
// bus is 1x clock
if ((tick % ticks1x) == 0) {
/* 16B BE read/write interface and sparse mem
[0:31] mem_adr
[0:127] mem_dat
mem_wr_val
[0:15] mem_wr_be
[0:127] mem_wr_dat
addr = dut.mem_adr.value.integer
w0 = sim.mem.read(addr)
w1 = sim.mem.read(addr+4)
w2 = sim.mem.read(addr+8)
w3 = sim.mem.read(addr+12)
v = cocotb.binary.BinaryValue()
v.assign(f'{w0:0>32b}{w1:0>32b}{w2:0>32b}{w3:0>32b}')
dut.mem_dat.value = v.value
if dut.mem_wr_val.value:
addr = dut.mem_adr.value.integer
dat = hex(dut.mem_wr_dat, 32)
be = f'{dut.mem_wr_be.value.integer:016b}'
for i in range(4):
sim.mem.write(addr, dat[i*8:i*8+8], be[i*4:i*4+4])
addr += 4
*/
// update read dat
unsigned int adr = m->mem_adr;
m->mem_dat[3] = mem.read(adr);
adr += 4;
m->mem_dat[2] = mem.read(adr);
adr += 4;
m->mem_dat[1] = mem.read(adr);
adr += 4;
m->mem_dat[0] = mem.read(adr);
// update mem[] if write
unsigned int mem_we = m->mem_wr_val;
unsigned int mem_be = m->mem_wr_be;
//unsigned int mem_datw[8] = m->mem_wr_dat;
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if (m->rootp->a2owb->ac_an_req == 1) {
cout << dec << setw(8) << setfill('0') << uppercase << cycle << " A2L2 Req RA=" << setw(8) << hex << setfill('0') << m->rootp->a2owb->ac_an_req_ra << endl;
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}
}
// finish clock stuff
if ((tick % ticks1x) == 0) {
cycle++;
if ((cycle % hbCycles) == 0) {
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cout << dec << setw(8) << setfill('0') << cycle << " ...tick..." << endl;
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}
}
#ifdef TRACING
t->dump(tick);
t->flush();
#endif
// check for fails
// hit limit
if (cycle > runCycles) {
break;
}
}
#ifdef TRACING
t->close();
#endif
m->final();
exit(EXIT_SUCCESS);
}