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173 lines
3.9 KiB
C++

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// simple verilator top
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// uses a2owb with sim mem interface
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#define TRACING
#include <cstddef>
#include <iostream>
#include <iomanip>
#include "verilated.h"
#include "Vc.h"
#ifdef TRACING
#include "verilated_vcd_c.h"
VerilatedVcdC *t;
#else
unsigned int t = 0;
#endif
/*
#include "uart/uartsim.h"
*/
Vc* 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;
const int threadRunCycle = 200;
const int runCycles = 1000;
const int hbCycles = 500;
const int threads = 1; // needs a more realistic a2l2 data return to work in smt
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int mem[16384][4]; // 16K QW
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void loadmem(void) {
int adr;
mem[0x0000/4] = 0x48000400;
adr = 0x400/4;
mem[adr++] = threads == 1 ? 0x38200001 : 0x38200003;
mem[adr++] = 0x7C366BA6;
mem[adr++] = 0x7C366BA6;
mem[adr++] = 0x7C3E6AA6;
mem[adr++] = 0x4C00012C;
mem[adr++] = 0x2C010000;
mem[adr++] = 0x38200660;
mem[adr++] = 0x41820008;
mem[adr++] = 0x38210100;
mem[adr++] = 0x7C2903A6;
mem[adr++] = 0x4E800420;
}
// nclk = (clk,reset,clk2x,clk4x,-,-)
int main(int argc, char **argv) {
using namespace std;
loadmem();
cout << setfill('0');
Verilated::commandArgs(argc, argv);
m = new Vc;
#ifdef TRACING
Verilated::traceEverOn(true);
t = new VerilatedVcdC;
m->trace(t, 99);
t->open("wtf.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;
m->nclk = 0x3C; // run 2x,4x = 1x
cout << setw(8) << cycle << "Resetting..." << endl;
m->an_ac_pm_thread_stop = threadStop;
cout << setw(8) << cycle << "Thread stop=" << threadStop << endl;
// can skip 4x with new gpr array
// 1x=4/4 2x=2/2 4x=1/1
// 1 1 1 7
// 1 1 0 6
// 1 0 1 5
// 1 0 0 4
// 0 1 1 3
// 0 1 0 2
// 0 0 1 1
// 0 0 0 0
// (insert reset)
//const int clocks[8] = {11, 0, 11, 0, 11, 0, 11, 0}; // 2x,4x == 1x
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//const int clocks[8] = {11, 10, 9, 8, 3, 2, 1, 0}; // 1x, 2x, 4x
//const int ticks1x = 8;
const int clocks[4] = {10, 8, 2, 0}; // 1x, 2x
const int ticks1x = 4;
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while (!Verilated::gotFinish()) {
if (!resetDone && (cycle > resetCycle)) {
m->nclk &= 0x2F;
cout << setw(8) << cycle << "Releasing reset." << endl;
resetDone = true;
}
if (threadStop && (cycle > threadRunCycle)) {
threadStop = 0x0;
m->an_ac_pm_thread_stop = threadStop;
cout << setw(8) << cycle << "Thread stop=" << threadStop << endl;
}
m->nclk = (m->nclk & 0x10) | (clocks[tick % 8] << 2);
tick++;
m->eval();
// bus is 1x clock
if ((tick % ticks1x) == 0) {
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/*
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cout << setw(8) << cycle << " an_ac_rsp: data="<< hex << uppercase << setw(8) << m->an_ac_reld_data[3]
<< hex << uppercase << setw(8) << m->an_ac_reld_data[2]
<< hex << uppercase << setw(8) << m->an_ac_reld_data[1]
<< hex << uppercase << setw(8) << m->an_ac_reld_data[0]
<< dec << nouppercase << endl;
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*/
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}
// finish clock stuff
if ((tick % ticks1x) == 0) {
cycle++;
if ((cycle % hbCycles) == 0) {
cout << setw(8) << cycle << " ...tick..." << endl;
}
}
#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);
}