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fixes quantum and quantum break handling

This commit is contained in:
Eyck Jentzsch 2023-10-27 21:12:49 +02:00
parent 09db0cd35d
commit e6f11081eb
3 changed files with 38 additions and 16 deletions
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30
src/sysc/core_complex.cpp
View File

@ -391,7 +391,10 @@ bool core_complex::read_mem(uint64_t addr, unsigned length, uint8_t *const data,
if (lut_entry.get_granted_access() != tlm::tlm_dmi::DMI_ACCESS_NONE && addr + length <= lut_entry.get_end_address() + 1) {
auto offset = addr - lut_entry.get_start_address();
std::copy(lut_entry.get_dmi_ptr() + offset, lut_entry.get_dmi_ptr() + offset + length, data);
quantum_keeper.inc(lut_entry.get_read_latency());
if(is_fetch)
ibus_inc+=lut_entry.get_read_latency()/curr_clk;
else
dbus_inc+=lut_entry.get_read_latency()/curr_clk;
return true;
} else {
auto& sckt = is_fetch? ibus : dbus;
@ -409,12 +412,17 @@ bool core_complex::read_mem(uint64_t addr, unsigned length, uint8_t *const data,
auto preExt = new tlm::scc::scv::tlm_recording_extension(trc->tr_handle, this);
gp.set_extension(preExt);
}
sckt->b_transport(gp, delay);
auto incr = delay-quantum_keeper.get_local_time();
if(is_fetch)
ibus_inc+=incr;
else
dbus_inc+=incr;
auto pre_delay = delay;
dbus->b_transport(gp, delay);
if(pre_delay>delay) {
quantum_keeper.reset();
} else {
auto incr = (delay-quantum_keeper.get_local_time())/curr_clk;
if(is_fetch)
ibus_inc+=incr;
else
dbus_inc+=incr;
}
SCCTRACE(this->name()) << "[local time: "<<delay<<"]: finish read_mem(0x" << std::hex << addr << ") : 0x" << (length==4?*(uint32_t*)data:length==2?*(uint16_t*)data:(unsigned)*data);
if (gp.get_response_status() != tlm::TLM_OK_RESPONSE) {
return false;
@ -439,7 +447,7 @@ bool core_complex::write_mem(uint64_t addr, unsigned length, const uint8_t *cons
addr + length <= lut_entry.get_end_address() + 1) {
auto offset = addr - lut_entry.get_start_address();
std::copy(data, data + length, lut_entry.get_dmi_ptr() + offset);
quantum_keeper.inc(lut_entry.get_read_latency());
dbus_inc+=lut_entry.get_write_latency()/curr_clk;
return true;
} else {
write_buf.resize(length);
@ -455,8 +463,12 @@ bool core_complex::write_mem(uint64_t addr, unsigned length, const uint8_t *cons
auto preExt = new tlm::scc::scv::tlm_recording_extension(trc->tr_handle, this);
gp.set_extension(preExt);
}
auto pre_delay = delay;
dbus->b_transport(gp, delay);
dbus_inc+=delay-quantum_keeper.get_local_time();
if(pre_delay>delay)
quantum_keeper.reset();
else
dbus_inc+=(delay-quantum_keeper.get_local_time())/curr_clk;
SCCTRACE() << "[local time: "<<delay<<"]: finish write_mem(0x" << std::hex << addr << ") : 0x" << (length==4?*(uint32_t*)data:length==2?*(uint16_t*)data:(unsigned)*data);
if (gp.get_response_status() != tlm::TLM_OK_RESPONSE) {
return false;

14
src/sysc/core_complex.h
View File

@ -156,17 +156,21 @@ public:
~core_complex();
inline unsigned get_last_bus_cycles() {
auto mem_incr = std::max(ibus_inc, dbus_inc);
ibus_inc = dbus_inc = 0;
return mem_incr>1?mem_incr:1;
}
inline void sync(uint64_t cycle) {
auto core_inc = curr_clk * (cycle - last_sync_cycle);
auto incr = std::max(core_inc, std::max(ibus_inc, dbus_inc));
quantum_keeper.inc(incr);
quantum_keeper.inc(core_inc);
if (quantum_keeper.need_sync()) {
wait(quantum_keeper.get_local_time());
quantum_keeper.reset();
}
last_sync_cycle = cycle;
ibus_inc = sc_core::SC_ZERO_TIME;
dbus_inc = sc_core::SC_ZERO_TIME;
}
bool read_mem(uint64_t addr, unsigned length, uint8_t *const data, bool is_fetch);
@ -198,7 +202,7 @@ protected:
std::vector<uint8_t> write_buf;
core_wrapper* cpu{nullptr};
sc_core::sc_signal<sc_core::sc_time> curr_clk;
sc_core::sc_time ibus_inc, dbus_inc;
uint64_t ibus_inc{0}, dbus_inc{0};
core_trace* trc{nullptr};
std::unique_ptr<scc::tick2time> t2t;
private:

10
src/sysc/sc_core_adapter.h
View File

@ -39,8 +39,13 @@ public:
uint64_t get_state() override { return this->state.mstatus.backing.val; }
void notify_phase(iss::arch_if::exec_phase p) override {
if (p == iss::arch_if::ISTART)
if (p == iss::arch_if::ISTART && !first) {
auto cycle_incr = owner->get_last_bus_cycles();
if(cycle_incr>1)
this->instr_if.update_last_instr_cycles(cycle_incr);
owner->sync(this->instr_if.get_total_cycles());
}
first=false;
}
iss::sync_type needed_sync() const override { return iss::PRE_SYNC; }
@ -175,8 +180,9 @@ public:
private:
sysc::tgfs::core_complex *const owner;
sc_core::sc_event wfi_evt;
uint64_t hostvar;
uint64_t hostvar{std::numeric_limits<uint64_t>::max()};
unsigned to_host_wr_cnt = 0;
bool first{true};
};
}
#endif /* _SYSC_SC_CORE_ADAPTER_H_ */