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[/] [ht_tunnel/] [tags/] [START/] [bench/] [flow_control_l2/] [history_buffer_l3_tb/] [history_buffer_l3_tb.cpp] - Rev 2
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//history_buffer_l3_tb.cpp /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is HyperTransport Tunnel IP Core. * * The Initial Developer of the Original Code is * Ecole Polytechnique de Montreal. * Portions created by the Initial Developer are Copyright (C) 2005 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Ami Castonguay <acastong@grm.polymtl.ca> * * Alternatively, the contents of this file may be used under the terms * of the Polytechnique HyperTransport Tunnel IP Core Source Code License * (the "PHTICSCL License", see the file PHTICSCL.txt), in which case the * provisions of PHTICSCL License are applicable instead of those * above. If you wish to allow use of your version of this file only * under the terms of the PHTICSCL License and not to allow others to use * your version of this file under the MPL, indicate your decision by * deleting the provisions above and replace them with the notice and * other provisions required by the PHTICSCL License. If you do not delete * the provisions above, a recipient may use your version of this file * under either the MPL or the PHTICSCL License." * * ***** END LICENSE BLOCK ***** */ #include "history_buffer_l3_tb.h" #include "../../../rtl/systemc/flow_control_l2/history_buffer_l3.h" #include <cstdlib> #include <sstream> using namespace std; history_buffer_l3_tb::history_buffer_l3_tb(sc_module_name name) : sc_module(name){ SC_THREAD(simulate_memory); sensitive_pos(clk); SC_THREAD(stimulus); sensitive_pos(clk); srand(8955); write_ack_number = 0; read_ack_number = 0; current_history_size = 0; internal_write_pos = 0; } void history_buffer_l3_tb::simulate_memory(){ while(true){ wait(); if(history_memory_read_address.read() >= HISTORY_MEMORY_SIZE){ cout << "Error, read address outside valid range" << endl; break; } history_memory_output = (sc_uint<32>)history_memory[history_memory_read_address.read()]; if(history_memory_write.read()){ if(history_memory_write_address.read() >= HISTORY_MEMORY_SIZE){ cout << "Error, write address outside valid range" << endl; break; } history_memory[history_memory_write_address.read()] = (unsigned)(sc_uint<32>)history_memory_write_data.read(); } } } /* sc_in <sc_bv<32> > history_packet; sc_in <bool > history_playback_done; sc_in <bool > room_available_in_history; sc_in <bool > history_playback_ready; sc_out <bool > consume_history; sc_out <bool > begin_history_playback; sc_out <bool > add_to_history; sc_out <bool > new_history_entry; sc_out <sc_uint<5> > new_history_entry_size_m1; sc_out<sc_bv<32> > fc_dword_lk; sc_out<bool> nop_received; sc_out<sc_uint<8> > ack_value; sc_out<bool> resetx; */ void history_buffer_l3_tb::stimulus(){ consume_history = false; begin_history_playback = false; add_to_history = false; new_history_entry = false; new_history_entry_size_m1 = 0; fc_dword_lk = 0; nop_received = false; write_ack_number = 0; read_ack_number = 0; /////////////////////////////////// // Test two short retry sequences /////////////////////////////////// resetx = false; for(int n = 0; n < 3; n++) wait(); resetx = true; try{ send_random_packets(4); ack_packets(2); send_random_packets(2); ack_packets(1); send_random_packets(2); ack_packets(3); playback_history(); ack_packets(1); send_random_packets(4); ack_packets(3); ack_packets(1); while(internal_write_pos > 18){ send_random_packets(1); } playback_history(); /////////////////////////////////// // Test room_available_in_history /////////////////////////////////// while((HISTORY_MEMORY_SIZE - current_history_size) > 18){ if(!room_available_in_history.read()){ cout << "HISTORY_MEMORY_SIZE: " << HISTORY_MEMORY_SIZE << endl; cout << "current_history_size: " << current_history_size << endl; throw SimulationException( "room_available_in_history is false when it should be true"); } send_random_packets(1); } if(room_available_in_history.read()) throw SimulationException( "room_available_in_history is true when it should be false"); cout << "SIMULATION COMPLETE" << endl; } catch(SimulationException se){ cout << se.data << endl; } } void history_buffer_l3_tb::playback_history(){ //Begin playback begin_history_playback = true; wait(); //Wait for the history to be ready for playback int max_time = 32; while(!history_playback_ready.read()){ if(max_time-- == 0){ throw SimulationException("Error, playback did not get ready"); } wait(); } begin_history_playback = false; //Read and check packets in history RetryEntry entry; for(std::deque<RetryEntry>::iterator i = simulated_history.begin(); i != simulated_history.end();i++) { entry = *i; int pos = 0; while(pos != entry.size){ if(history_playback_done.read()){ throw SimulationException( "ERROR: History playback done signal asserted before really done"); } if(consume_history.read()){ if(history_packet.read() != sc_uint<32>(entry.dwords[pos])){ ostringstream o; o << "Error, invalid dword received: " << history_packet.read().to_string(SC_HEX) << " expected: " << sc_uint<32>(entry.dwords[pos]).to_string(SC_HEX); throw SimulationException(o.str()); } pos++; } consume_history = ((rand() % 10) < 8) && (pos != entry.size); wait(); } } //Verify the playback done signal int max_count = 2; while(history_playback_done.read()){ if(--max_count == 0){ throw SimulationException( "ERROR: History playback done signal not asserted when actually done"); } wait(); } } void history_buffer_l3_tb::ack_packets(int number){ read_ack_number = (read_ack_number + number) % 256; ack_value = read_ack_number; nop_received = true; wait(); nop_received = false; for(int n = 0; n < number; n++){ current_history_size -= simulated_history.front().size + 1; simulated_history.pop_front(); } } void history_buffer_l3_tb::send_random_packets(int number){ RetryEntry entry; for(int n = 0; n < number; n++){ generateRandomEntry(&entry); simulated_history.push_back(entry); new_history_entry = true; new_history_entry_size_m1 = entry.size - 1; wait(); new_history_entry = false; int dwords_sent = 0; while(dwords_sent < entry.size){ bool send = rand() % 10 < 8; add_to_history = send; if(send) fc_dword_lk = entry.dwords[dwords_sent++]; wait(); } add_to_history = false; current_history_size += entry.size + 1; internal_write_pos = (internal_write_pos + entry.size + 1) % 128; } } /* struct RetryEntry{ int size; int identification; int dwords[18]; } */ void history_buffer_l3_tb::generateRandomEntry(RetryEntry * e){ e->size = (rand() % 18) + 1; e->identification = ++write_ack_number; for(int i = 0; i < e->size; i++){ //Rand can have a MAX_VALUE as low as 32K on some compilers e->dwords[i] = rand() & 0xFFF | ((rand() & 0xFFF) << 12) | ((rand() & 0xFF) << 24); } //Clear the last to facilitate detecting errors for(int i = e->size; i < 18; i++){ e->dwords[i] = 0; } }
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