void ram::custom_b_transport( tlm::tlm_generic_payload &payload, sc_core::sc_time &delay_time)
{
sc_core::sc_time mem_op_time;
payload.set_dmi_allowed(m_dmi_on);
m_target_memory.operation(payload, mem_op_time);
return;
}
//Method used for receiving acknowledgements of interrupts; the ack consists of
//uninteresting data and the address corresponds to the interrupt signal to
//be lowered
//As a response, I lower the interrupt by sending a NULL pointer on the init_socket
void b_transport(tlm::tlm_generic_payload& trans, sc_time& delay) {
if(this->lastIrq < 0) {
THROW_EXCEPTION("Error, lowering an interrupt which hasn't been raised yet!!");
}
tlm::tlm_command cmd = trans.get_command();
sc_dt::uint64 adr = trans.get_address();
unsigned char* ptr = trans.get_data_ptr();
if(trans.get_command() == tlm::TLM_READ_COMMAND) {
THROW_EXCEPTION("Error, the read request is not currently supported by external PINs");
}
else if(cmd == tlm::TLM_WRITE_COMMAND) {
if(this->lastIrq != adr) {
THROW_EXCEPTION("Error, lowering interrupt " << std::hex << std::showbase << (unsigned)adr << " while " << std::hex << std::showbase << this->lastIrq << " was raised");
}
else {
//finally I can really lower the interrupt: I send 0 on
//the initSocked
unsigned char data = 0;
trans.set_data_ptr(&data);
trans.set_dmi_allowed(false);
trans.set_response_status( tlm::TLM_INCOMPLETE_RESPONSE );
sc_time delay;
this->init_socket->b_transport(trans, delay);
if(trans.is_response_error()) {
std::string errorStr("Error in b_transport of PIN, response status = " + trans.get_response_string());
SC_REPORT_ERROR("TLM-2", errorStr.c_str());
}
this->lastIrq = -1;
}
}
trans.set_response_status(tlm::TLM_OK_RESPONSE);
}
virtual void b_transport( tlm::tlm_generic_payload& trans, sc_time& delay )
{
tlm::tlm_command cmd = trans.get_command();
unsigned char* ptr = trans.get_data_ptr();
unsigned int len = trans.get_data_length();
unsigned char* byt = trans.get_byte_enable_ptr();
unsigned int bel = trans.get_byte_enable_length();
my_extension* ext;
trans.get_extension(ext);
assert( ext );
assert( len == ext->len );
assert( bel == ext->bel );
for (unsigned int i = 0; i < bel; i++)
assert( byt[i] == ext->byt[i] );
for (unsigned int i = 0; i < len; i++)
assert( ptr[i] == ext->ptr[i] );
if (cmd == tlm::TLM_READ_COMMAND)
{
for (unsigned int i = 0; i < len; i++)
{
data[i] = rand() % 256;
ptr[i] = data[i];
}
ext->ptr = data;
}
trans.set_dmi_allowed( true );
trans.set_response_status( tlm::TLM_OK_RESPONSE );
}
// TLM-2 blocking transport method
virtual void b_transport( tlm::tlm_generic_payload& trans, sc_time& delay )
{
tlm::tlm_command cmd = trans.get_command();
sc_dt::uint64 adr = trans.get_address() / 4;
unsigned char* ptr = trans.get_data_ptr();
unsigned int len = trans.get_data_length();
unsigned char* byt = trans.get_byte_enable_ptr();
unsigned int wid = trans.get_streaming_width();
// Obliged to check address range and check for unsupported features,
// i.e. byte enables, streaming, and bursts
// Can ignore extensions
// *********************************************
// Generate the appropriate error response
// *********************************************
if (adr >= sc_dt::uint64(SIZE)) {
trans.set_response_status( tlm::TLM_ADDRESS_ERROR_RESPONSE );
return;
}
if (byt != 0) {
trans.set_response_status( tlm::TLM_BYTE_ENABLE_ERROR_RESPONSE );
return;
}
if (len > 4 || wid < len) {
trans.set_response_status( tlm::TLM_BURST_ERROR_RESPONSE );
return;
}
// Obliged to implement read and write commands
if ( cmd == tlm::TLM_READ_COMMAND )
memcpy(ptr, &mem[adr], len);
else if ( cmd == tlm::TLM_WRITE_COMMAND )
memcpy(&mem[adr], ptr, len);
// Illustrates that b_transport may block
wait(delay);
// Reset timing annotation after waiting
delay = SC_ZERO_TIME;
// *********************************************
// Set DMI hint to indicated that DMI is supported
// *********************************************
trans.set_dmi_allowed(true);
// Obliged to set response status to indicate successful completion
trans.set_response_status( tlm::TLM_OK_RESPONSE );
}
//==============================================================================
// b_transport implementation calls from initiators
//
//=============================================================================
void
lt_dmi_target::custom_b_transport
( tlm::tlm_generic_payload &payload // ref to Generic Payload
, sc_core::sc_time &delay_time // delay time
)
{
sc_core::sc_time mem_op_time;
std::ostringstream msg;
msg.str("");
m_target_memory.operation(payload, mem_op_time);
if(m_dmi_enabled)
{
payload.set_dmi_allowed(true);
msg << "Target: " << m_ID
<< " has set dmi_allowed "
<< endl << " ";
}
else
{
payload.set_dmi_allowed(false);
}
msg << "Target: " << m_ID
<< " returned delay of " << delay_time
<< " + " << m_accept_delay << " + " << mem_op_time;
delay_time = delay_time + m_accept_delay + mem_op_time;
msg << " = " << delay_time;
REPORT_INFO(filename, __FUNCTION__, msg.str());
return;
}
bool ram::get_direct_mem_ptr(tlm::tlm_generic_payload &trans, tlm::tlm_dmi &dmi_data)
{
sc_dt::uint64 address = trans.get_address();
if (address > m_high_address) {
// should not happen
cerr << "ram::get_direct_mem_ptr: address overflow";
return false;
}
// if (m_invalidate) m_invalidate_dmi_event.notify(m_invalidate_dmi_time);
dmi_data.allow_read_write();
dmi_data.set_start_address(0x0);
dmi_data.set_end_address(m_high_address);
unsigned char *ptr = m_target_memory.get_mem_ptr();
trans.set_dmi_allowed(m_dmi_on);
dmi_data.set_dmi_ptr(ptr);
return true;
}
unsigned int ram::debug_transport (tlm::tlm_generic_payload &payload)
{
sc_core::sc_time mem_op_time;
payload.set_dmi_allowed(m_dmi_on);
return m_target_memory.debug(payload, mem_op_time);
}
