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adding CSR support to rtlsim driver

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This commit is contained in:
Blaise Tine
2020-09-04 06:51:31 -04:00
parent dccea80b68
commit 112d8ab815
10 changed files with 167 additions and 42 deletions
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63
driver/rtlsim/vortex.cpp
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@@ -69,7 +69,28 @@ public:
}
~vx_device() {
simulator_.print_stats(std::cout);
#ifdef DUMP_PERF_STATS
unsigned num_cores;
this->get_csr(0, CSR_NC, &num_cores);
if (num_cores > 1) {
uint64_t total_instrs = 0, total_cycles = 0;
for (unsigned core_id = 0; core_id < num_cores; ++core_id) {
uint64_t instrs, cycles;
vx_get_perf(this, core_id, &instrs, &cycles);
float IPC = (float)(double(instrs) / double(cycles));
fprintf(stdout, "PERF: core%d: instrs=%ld, cycles=%ld, IPC=%f\n", core_id, instrs, cycles, IPC);
total_instrs += instrs;
total_cycles = std::max<uint64_t>(total_cycles, cycles);
}
float IPC = (float)(double(total_instrs) / double(total_cycles));
fprintf(stdout, "PERF: instrs=%ld, cycles=%ld, IPC=%f\n", total_instrs, total_cycles, IPC);
} else {
uint64_t instrs, cycles;
vx_get_perf(this, 0, &instrs, &cycles);
float IPC = (float)(double(instrs) / double(cycles));
fprintf(stdout, "PERF: instrs=%ld, cycles=%ld, IPC=%f\n", instrs, cycles, IPC);
}
#endif
if (future_.valid()) {
future_.wait();
}
@@ -152,6 +173,28 @@ public:
return 0;
}
int set_csr(int core_id, int addr, unsigned value) {
if (future_.valid()) {
future_.wait(); // ensure prior run completed
}
simulator_.set_csr(core_id, addr, value);
while (simulator_.is_busy()) {
simulator_.step();
};
return 0;
}
int get_csr(int core_id, int addr, unsigned *value) {
if (future_.valid()) {
future_.wait(); // ensure prior run completed
}
simulator_.get_csr(core_id, addr, value);
while (simulator_.is_busy()) {
simulator_.step();
};
return 0;
}
private:
size_t mem_allocation_;
@@ -324,10 +367,20 @@ extern int vx_ready_wait(vx_device_h hdevice, long long timeout) {
return device->wait(timeout);
}
extern int vx_csr_set(vx_device_h /*hdevice*/, int /*core*/, int /*address*/, unsigned /*value*/) {
return -1;
extern int vx_csr_set(vx_device_h hdevice, int core_id, int addr, unsigned value) {
if (nullptr == hdevice)
return -1;
vx_device *device = ((vx_device*)hdevice);
return device->set_csr(core_id, addr, value);
}
extern int vx_csr_get(vx_device_h /*hdevice*/, int /*core*/, int /*address*/, unsigned* /*value*/) {
return -1;
extern int vx_csr_get(vx_device_h hdevice, int core_id, int addr, unsigned* value) {
if (nullptr == hdevice)
return -1;
vx_device *device = ((vx_device*)hdevice);
return device->get_csr(core_id, addr, value);
}