/* ------------------------------------------------------------------------- */
void
Slave::my_b_transport(tlm_generic_payload &trans, sc_time &local_time)
{
sc_assert((BUS_WIDTH % 32) == 0);
unsigned int length = trans.get_data_length();
unsigned int address = trans.get_address();
//some checks and error responses to unsupported features
if (trans.get_byte_enable_ptr()){
// not supporting byte enable
trans.set_response_status(TLM_BYTE_ENABLE_ERROR_RESPONSE);
} else if (trans.get_streaming_width() < length) {
// not supporting streaming
trans.set_response_status(TLM_BURST_ERROR_RESPONSE);
} else if ((length%bus_width_in_bytes) || (address%bus_width_in_bytes)){
// not supporting unaligned access
trans.set_response_status(TLM_ADDRESS_ERROR_RESPONSE);
} else {
trans.set_response_status(TLM_OK_RESPONSE);
if (trans.is_read()) { // only allow reading from result register
if (address == REG_RESULT && (length == bus_width_in_bytes)) {
unsigned int *data_ptr = (unsigned int *) trans.get_data_ptr();
*data_ptr= sum_;
} else {
trans.set_response_status(TLM_ADDRESS_ERROR_RESPONSE);
}
local_time += (SLAVE_READ_DELAY+(length/bus_width_in_bytes))
* bus_clock_period;
} else {
// write
// only on the terms, burst access is taken into account
if ((address == REG_START) && (length == bus_width_in_bytes)) {
run_event_.notify(local_time+SLAVE_WRITE_DELAY*bus_clock_period);
} else if ((address < REG_OFFSET_TERMS)
|| (address >= REG_OFFSET_TERMS+sizeof(int)*NR_TERMS)) {
trans.set_response_status(TLM_ADDRESS_ERROR_RESPONSE);
} else {
unsigned int index = (address - REG_OFFSET_TERMS)/sizeof(int);
unsigned int remaining = (NR_TERMS-index)*sizeof(int);
const void *data_ptr = (const void *) trans.get_data_ptr();
if (length<= remaining) {
memcpy((void *) &terms_[index], data_ptr, length);
} else {
memcpy((void *) &terms_[index], data_ptr, remaining);
}
}
local_time += (SLAVE_WRITE_DELAY+(length/bus_width_in_bytes))
* bus_clock_period;
}
}
}
/**
* \brief Receives a transaction from the bus and transform the interface to read/write
*
* \param trans The transaction packet
* \param delay Transaction delay (actually ignored)
*/
void UC_master_slave_base::b_transport(tlm_generic_payload &trans, sc_time &delay) {
unsigned int addr = trans.get_address();
DATA data = trans.get_data_ptr();
unsigned int size = trans.get_data_length();
int bytes;
if (trans.is_read() == true) {
add_read_access (size);
bytes = this->read(addr, data, size);
}
else if (trans.is_write() == true) {
add_write_access (size);
bytes = this->write(addr, data, size);
}
else {
cout << "HW error: TLM command unrecognized" << endl;
bytes = -3;
}
switch (bytes) {
case 0:
trans.set_response_status(TLM_INCOMPLETE_RESPONSE);
break;
case -1:
trans.set_response_status(TLM_GENERIC_ERROR_RESPONSE);
break;
case -2:
trans.set_response_status(TLM_ADDRESS_ERROR_RESPONSE);
break;
case -3:
trans.set_response_status(TLM_COMMAND_ERROR_RESPONSE);
break;
default:
trans.set_response_status(TLM_OK_RESPONSE);
break;
}
}
void test_a_conversion(char cmd, tlm_generic_payload &txn, std::ifstream & fin) {
if(cmd == 'R') txn.set_read();
else txn.set_write();
fin.ignore(10000,'=');
uint64 a;
fin >> a;
txn.set_address(a);
fin.ignore(10000,'=');
int l;
fin >> l;
txn.set_data_length(l);
int bus_width;
fin.ignore(10000,'='); fin >> bus_width;
int data_width;
fin.ignore(10000,'='); fin >> data_width;
int initiator_offset;
fin.ignore(10000,'='); fin >> initiator_offset;
unsigned char *original_byte_enable = 0;
unsigned char *byte_enable_legible =
new unsigned char[txn.get_data_length() + 1];
memset(byte_enable_legible, 0, txn.get_data_length() + 1);
fin.ignore(10000,'=');
for(unsigned b=0; b<txn.get_data_length(); b++) {
char tmp; fin >> tmp;
if((tmp=='0')||(tmp=='1')||(tmp=='x')) byte_enable_legible[b]=tmp;
else break;
}
if((byte_enable_legible[0] == '1') || (byte_enable_legible[0] == '0')) {
txn.set_byte_enable_ptr(new unsigned char[txn.get_data_length()]);
txn.set_byte_enable_length(txn.get_data_length());
original_byte_enable = txn.get_byte_enable_ptr();
for(unsigned int i=0; i<txn.get_data_length(); i++) {
if(byte_enable_legible[i] == '0') {
txn.get_byte_enable_ptr()[i] = TLM_BYTE_DISABLED;
} else if(byte_enable_legible[i] == '1') {
txn.get_byte_enable_ptr()[i] = TLM_BYTE_ENABLED;
} else {
// not enough byte enables
txn.set_byte_enable_length(i);
break;
}
}
} else {
txn.set_byte_enable_ptr(0);
txn.set_byte_enable_length(0);
}
int stream_width;
fin.ignore(10000,'='); fin >> stream_width;
txn.set_streaming_width(stream_width);
cout << "enter initiator memory state = ("<< BUFFER_SIZE << " characters)\n";
unsigned char initiator_mem[BUFFER_SIZE+1];
memset(initiator_mem, 0, BUFFER_SIZE+1);
fin.ignore(10000,'='); fin >> initiator_mem;
txn.set_data_ptr(initiator_mem + initiator_offset);
cout << "enter target memory state = ("<< BUFFER_SIZE << " characters)\n";
unsigned char target_mem[BUFFER_SIZE+1];
memset(target_mem, 0, BUFFER_SIZE+1);
fin.ignore(10000,'='); fin >> target_mem;
cout << "enter converter choice = (0 => generic, 1 => word, 2 => aligned, 3 => single)\n";
int converter;
fin.ignore(10000,'='); fin >> converter;
cout << "Initiator Intent\n";
cout << " Cmd = " << cmd << endl;
cout << " Addr = " << txn.get_address() << endl;
cout << " Len = " << txn.get_data_length() << endl;
cout << " Bus Width = " << bus_width << endl;
cout << " Data Word = " << data_width << endl;
#ifdef VERBOSE
cout << " Initiator offset and txn data pointer = " << initiator_offset << ", " << int(txn.get_data_ptr()) << endl;
cout << " Byte enables and byte enable pointer = " << byte_enable_legible << ", " << int(txn.get_byte_enable_ptr()) << endl;
#else
cout << " Initiator offset = " << initiator_offset << endl;
cout << " Byte enables = " << byte_enable_legible << endl;
#endif
cout << " Byte enable length = " << txn.get_byte_enable_length() << endl;
cout << " Streaming width = " << txn.get_streaming_width() << endl;
cout << " Initiator memory = " << initiator_mem << endl;
cout << " Target memory = " << target_mem << endl;
cout << " Converter = " << converter << endl << endl;
// initiator //
switch(converter) {
case 0: convert(tlm_to_hostendian_generic); break;
case 1: convert(tlm_to_hostendian_word); break;
case 2: convert(tlm_to_hostendian_aligned); break;
case 3: convert(tlm_to_hostendian_single); break;
case 4: convert(local_single_tohe); break;
default: cout << "no such converter as " << converter << endl;
exit(1);
}
cout << "Converted Transaction\n";
cout << " Addr = " << txn.get_address() << endl;
cout << " Len = " << txn.get_data_length() << endl;
#ifdef VERBOSE
cout << " Txn data pointer = " << int(txn.get_data_ptr()) << endl;
if(txn.get_byte_enable_ptr() != 0) {
cout << " Byte enables and byte enable pointer = ";
for(unsigned int i=0; i<txn.get_data_length(); i++)
cout << (txn.get_byte_enable_ptr()[i] ? '1' : '0');
cout << ", " << int(txn.get_byte_enable_ptr()) << endl;
}
#else
cout << " Txn data pointer = " <<
(txn.get_data_ptr() == initiator_mem+initiator_offset ? "unchanged" : "changed") << endl;
if(txn.get_byte_enable_ptr() != 0) {
cout << " Byte enables and byte enable pointer = ";
for(unsigned int i=0; i<txn.get_data_length(); i++)
cout << (txn.get_byte_enable_ptr()[i] ? '1' : '0');
cout << ", " <<
(txn.get_byte_enable_ptr() == original_byte_enable ? "unchanged" : "changed") << endl;
}
#endif
cout << " Byte enable length = " << txn.get_byte_enable_length() << endl;
cout << " Streaming width = " << txn.get_streaming_width() << endl;
cout << endl;
// target //
int sw = txn.get_streaming_width();
if((txn.get_data_length()/sw)*sw != txn.get_data_length()) {
cout << "ERROR: Data length not a multiple of streaming width\n";
exit(1);
}
for(unsigned int ss = 0; ss < txn.get_data_length(); ss += sw) {
if(txn.get_byte_enable_ptr() == 0) {
// simple transaction can be processed by mem-copy
if(txn.is_read())
memcpy(ss+txn.get_data_ptr(), target_mem+txn.get_address(), sw);
else
memcpy(target_mem+txn.get_address(), ss+txn.get_data_ptr(), sw);
} else {
// complex transaction, byte enables, maybe shorter than data
int bel = txn.get_byte_enable_length();
if(txn.is_read()) {
for(int j=0; j<sw; j++) {
if(txn.get_byte_enable_ptr()[(ss+j) % bel])
(txn.get_data_ptr())[ss+j] = target_mem[j+txn.get_address()];
}
} else {
for(int j=0; j<sw; j++) {
if(txn.get_byte_enable_ptr()[(ss+j) % bel])
target_mem[j+txn.get_address()] = (txn.get_data_ptr())[ss+j];
}
}
}
}
// initiator again //
if((rand() & 0x100) && (converter < 4)) {
#ifdef VERBOSE
cout << "using single entry point for response\n";
#endif
tlm_from_hostendian(&txn);
} else {
#ifdef VERBOSE
cout << "using specific entry point for response\n";
#endif
switch(converter) {
case 0: convert(tlm_from_hostendian_generic); break;
case 1: convert(tlm_from_hostendian_word); break;
case 2: convert(tlm_from_hostendian_aligned); break;
case 3: convert(tlm_from_hostendian_single); break;
case 4: convert(local_single_fromhe); break;
default: cout << "no such converter as " << converter << endl;
exit(1);
}
}
// print the results //
cout << "Memory States after Transaction\n";
cout << " initiator = " << initiator_mem << endl;
cout << " target = " << target_mem << endl << endl;
// clean up
delete [] byte_enable_legible;
if(original_byte_enable != 0) delete [] original_byte_enable;
}
