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[OpenFPGA Tool] Bug fix in the smart fast configuration strategy

This commit is contained in:
tangxifan 2020-09-24 16:31:55 -06:00
parent 79875d5a91
commit 8468f25b23
1 changed files with 135 additions and 50 deletions
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185
openfpga/src/fpga_verilog/verilog_top_testbench.cpp
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@ -60,6 +60,54 @@ constexpr char* TOP_TB_CLOCK_REG_POSTFIX = "_reg";
constexpr char* AUTOCHECK_TOP_TESTBENCH_VERILOG_MODULE_POSTFIX = "_autocheck_top_tb";
/********************************************************************
* Identify global reset ports for programming
*******************************************************************/
static
std::vector<CircuitPortId> find_global_programming_reset_ports(const CircuitLibrary& circuit_lib,
const std::vector<CircuitPortId>& global_ports) {
/* Try to find global reset ports for programming */
std::vector<CircuitPortId> global_prog_reset_ports;
for (const CircuitPortId& global_port : global_ports) {
VTR_ASSERT(true == circuit_lib.port_is_global(global_port));
if (false == circuit_lib.port_is_prog(global_port)) {
continue;
}
VTR_ASSERT(true == circuit_lib.port_is_prog(global_port));
VTR_ASSERT( (false == circuit_lib.port_is_reset(global_port))
|| (false == circuit_lib.port_is_set(global_port)));
if (true == circuit_lib.port_is_reset(global_port)) {
global_prog_reset_ports.push_back(global_port);
}
}
return global_prog_reset_ports;
}
/********************************************************************
* Identify global set ports for programming
*******************************************************************/
static
std::vector<CircuitPortId> find_global_programming_set_ports(const CircuitLibrary& circuit_lib,
const std::vector<CircuitPortId>& global_ports) {
/* Try to find global set ports for programming */
std::vector<CircuitPortId> global_prog_set_ports;
for (const CircuitPortId& global_port : global_ports) {
VTR_ASSERT(true == circuit_lib.port_is_global(global_port));
if (false == circuit_lib.port_is_prog(global_port)) {
continue;
}
VTR_ASSERT(true == circuit_lib.port_is_prog(global_port));
VTR_ASSERT( (false == circuit_lib.port_is_reset(global_port))
|| (false == circuit_lib.port_is_set(global_port)));
if (true == circuit_lib.port_is_set(global_port)) {
global_prog_set_ports.push_back(global_port);
}
}
return global_prog_set_ports;
}
/********************************************************************
* Print local wires for flatten memory (standalone) configuration protocols
*******************************************************************/
@ -242,7 +290,9 @@ void print_verilog_top_testbench_global_ports_stimuli(std::fstream& fp,
const ModuleManager& module_manager,
const ModuleId& top_module,
const CircuitLibrary& circuit_lib,
const std::vector<CircuitPortId>& global_ports) {
const std::vector<CircuitPortId>& global_ports,
const bool& active_global_prog_reset,
const bool& active_global_prog_set) {
/* Validate the file stream */
valid_file_stream(fp);
@ -324,10 +374,13 @@ void print_verilog_top_testbench_global_ports_stimuli(std::fstream& fp,
ModulePortId module_global_port = module_manager.find_module_port(top_module, circuit_lib.port_prefix(model_global_port));
VTR_ASSERT(true == module_manager.valid_module_port_id(top_module, module_global_port));
/* For global programming reset port, we will active only when specified */
BasicPort stimuli_reset_port;
bool activate = true;
if (true == circuit_lib.port_is_prog(model_global_port)) {
stimuli_reset_port.set_name(std::string(TOP_TB_PROG_RESET_PORT_NAME));
stimuli_reset_port.set_width(1);
activate = active_global_prog_reset;
} else {
VTR_ASSERT_SAFE(false == circuit_lib.port_is_prog(model_global_port));
stimuli_reset_port.set_name(std::string(TOP_TB_RESET_PORT_NAME));
@ -337,9 +390,15 @@ void print_verilog_top_testbench_global_ports_stimuli(std::fstream& fp,
* The wiring will be inverted if the default value of the global port is 1
* Otherwise, the wiring will not be inverted!
*/
print_verilog_wire_connection(fp, module_manager.module_port(top_module, module_global_port),
stimuli_reset_port,
1 == circuit_lib.port_default_value(model_global_port));
if (true == activate) {
print_verilog_wire_connection(fp, module_manager.module_port(top_module, module_global_port),
stimuli_reset_port,
1 == circuit_lib.port_default_value(model_global_port));
} else {
VTR_ASSERT_SAFE(false == activate);
print_verilog_wire_constant_values(fp, module_manager.module_port(top_module, module_global_port),
std::vector<size_t>(1, circuit_lib.port_default_value(model_global_port)));
}
}
/* Connect global set ports to operating or programming set signal */
@ -366,10 +425,13 @@ void print_verilog_top_testbench_global_ports_stimuli(std::fstream& fp,
ModulePortId module_global_port = module_manager.find_module_port(top_module, circuit_lib.port_prefix(model_global_port));
VTR_ASSERT(true == module_manager.valid_module_port_id(top_module, module_global_port));
/* For global programming set port, we will active only when specified */
BasicPort stimuli_set_port;
bool activate = true;
if (true == circuit_lib.port_is_prog(model_global_port)) {
stimuli_set_port.set_name(std::string(TOP_TB_PROG_SET_PORT_NAME));
stimuli_set_port.set_width(1);
activate = active_global_prog_set;
} else {
VTR_ASSERT_SAFE(false == circuit_lib.port_is_prog(model_global_port));
stimuli_set_port.set_name(std::string(TOP_TB_SET_PORT_NAME));
@ -379,9 +441,15 @@ void print_verilog_top_testbench_global_ports_stimuli(std::fstream& fp,
* The wiring will be inverted if the default value of the global port is 1
* Otherwise, the wiring will not be inverted!
*/
print_verilog_wire_connection(fp, module_manager.module_port(top_module, module_global_port),
stimuli_set_port,
1 == circuit_lib.port_default_value(model_global_port));
if (true == activate) {
print_verilog_wire_connection(fp, module_manager.module_port(top_module, module_global_port),
stimuli_set_port,
1 == circuit_lib.port_default_value(model_global_port));
} else {
VTR_ASSERT_SAFE(false == activate);
print_verilog_wire_constant_values(fp, module_manager.module_port(top_module, module_global_port),
std::vector<size_t>(1, circuit_lib.port_default_value(model_global_port)));
}
}
/* For the rest of global ports, wire them to constant signals */
@ -584,6 +652,7 @@ void print_verilog_top_testbench_ports(std::fstream& fp,
static
size_t calculate_num_config_clock_cycles(const e_config_protocol_type& sram_orgz_type,
const bool& fast_configuration,
const bool& bit_value_to_skip,
const BitstreamManager& bitstream_manager,
const FabricBitstream& fabric_bitstream) {
size_t num_config_clock_cycles = 1 + fabric_bitstream.num_bits();
@ -602,7 +671,7 @@ size_t calculate_num_config_clock_cycles(const e_config_protocol_type& sram_orgz
size_t full_num_config_clock_cycles = num_config_clock_cycles;
size_t num_bits_to_skip = 0;
for (const FabricBitId& bit_id : fabric_bitstream.bits()) {
if (true == bitstream_manager.bit_value(fabric_bitstream.config_bit(bit_id))) {
if (bit_value_to_skip != bitstream_manager.bit_value(fabric_bitstream.config_bit(bit_id))) {
break;
}
num_bits_to_skip++;
@ -623,7 +692,7 @@ size_t calculate_num_config_clock_cycles(const e_config_protocol_type& sram_orgz
size_t full_num_config_clock_cycles = num_config_clock_cycles;
num_config_clock_cycles = 1;
for (const FabricBitId& bit_id : fabric_bitstream.bits()) {
if (true == fabric_bitstream.bit_din(bit_id)) {
if (bit_value_to_skip != fabric_bitstream.bit_din(bit_id)) {
num_config_clock_cycles++;
}
}
@ -1008,11 +1077,11 @@ void print_verilog_top_testbench_generic_stimulus(std::fstream& fp,
fp << std::endl;
/* Programming set signal for configuration circuit : always disabled */
print_verilog_comment(fp, "----- Begin programming set signal generation: always disabled -----");
print_verilog_comment(fp, "----- Begin programming set signal generation -----");
print_verilog_pulse_stimuli(fp, prog_set_port,
0, /* Initial value */
1, /* Initial value */
prog_clock_period / timescale, 0);
print_verilog_comment(fp, "----- End programming set signal generation: always disabled -----");
print_verilog_comment(fp, "----- End programming set signal generation -----");
fp << std::endl;
@ -1526,41 +1595,11 @@ static
void print_verilog_top_testbench_bitstream(std::fstream& fp,
const e_config_protocol_type& config_protocol_type,
const bool& fast_configuration,
const CircuitLibrary& circuit_lib,
const std::vector<CircuitPortId>& global_ports,
const bool& bit_value_to_skip,
const ModuleManager& module_manager,
const ModuleId& top_module,
const BitstreamManager& bitstream_manager,
const FabricBitstream& fabric_bitstream) {
/* Try to find global reset/set ports for programming */
std::vector<CircuitPortId> global_prog_reset_ports;
std::vector<CircuitPortId> global_prog_set_ports;
for (const CircuitPortId& global_port : global_ports) {
VTR_ASSERT(true == circuit_lib.port_is_global(global_port));
if (false == circuit_lib.port_is_prog(global_port)) {
continue;
}
VTR_ASSERT(true == circuit_lib.port_is_prog(global_port));
VTR_ASSERT( (false == circuit_lib.port_is_reset(global_port))
|| (false == circuit_lib.port_is_set(global_port)));
if (true == circuit_lib.port_is_reset(global_port)) {
global_prog_reset_ports.push_back(global_port);
}
if (true == circuit_lib.port_is_set(global_port)) {
global_prog_set_ports.push_back(global_port);
}
}
bool apply_fast_configuration = fast_configuration;
if ( (global_prog_set_ports.empty() && global_prog_reset_ports.empty())
&& (true == fast_configuration)) {
VTR_LOG_WARN("None of global reset and set ports are defined for programming purpose. Fast configuration is turned off\n");
}
bool bit_value_to_skip = find_bit_value_to_skip_for_fast_configuration(config_protocol_type,
apply_fast_configuration,
global_prog_reset_ports,
global_prog_set_ports,
bitstream_manager, fabric_bitstream);
/* Branch on the type of configuration protocol */
switch (config_protocol_type) {
@ -1570,18 +1609,18 @@ void print_verilog_top_testbench_bitstream(std::fstream& fp,
bitstream_manager, fabric_bitstream);
break;
case CONFIG_MEM_SCAN_CHAIN:
print_verilog_top_testbench_configuration_chain_bitstream(fp, apply_fast_configuration,
print_verilog_top_testbench_configuration_chain_bitstream(fp, fast_configuration,
bit_value_to_skip,
bitstream_manager, fabric_bitstream);
break;
case CONFIG_MEM_MEMORY_BANK:
print_verilog_top_testbench_memory_bank_bitstream(fp, apply_fast_configuration,
print_verilog_top_testbench_memory_bank_bitstream(fp, fast_configuration,
bit_value_to_skip,
module_manager, top_module,
fabric_bitstream);
break;
case CONFIG_MEM_FRAME_BASED:
print_verilog_top_testbench_frame_decoder_bitstream(fp, apply_fast_configuration,
print_verilog_top_testbench_frame_decoder_bitstream(fp, fast_configuration,
bit_value_to_skip,
module_manager, top_module,
fabric_bitstream);
@ -1652,6 +1691,23 @@ void print_verilog_top_testbench(const ModuleManager& module_manager,
/* Preparation: find all the clock ports */
std::vector<std::string> clock_port_names = find_atom_netlist_clock_port_names(atom_ctx.nlist, netlist_annotation);
/* Preparation: find all the reset/set ports for programming usage */
std::vector<CircuitPortId> global_prog_reset_ports = find_global_programming_reset_ports(circuit_lib, global_ports);
std::vector<CircuitPortId> global_prog_set_ports = find_global_programming_set_ports(circuit_lib, global_ports);
/* Identify if we can apply fast configuration */
bool apply_fast_configuration = fast_configuration;
if ( (global_prog_set_ports.empty() && global_prog_reset_ports.empty())
&& (true == fast_configuration)) {
VTR_LOG_WARN("None of global reset and set ports are defined for programming purpose. Fast configuration is turned off\n");
apply_fast_configuration = false;
}
bool bit_value_to_skip = find_bit_value_to_skip_for_fast_configuration(config_protocol.type(),
apply_fast_configuration,
global_prog_reset_ports,
global_prog_set_ports,
bitstream_manager, fabric_bitstream);
/* Start of testbench */
print_verilog_top_testbench_ports(fp, module_manager, top_module,
atom_ctx, netlist_annotation, clock_port_names,
@ -1663,7 +1719,8 @@ void print_verilog_top_testbench(const ModuleManager& module_manager,
float op_clock_period = (1./simulation_parameters.operating_clock_frequency());
/* Estimate the number of configuration clock cycles */
size_t num_config_clock_cycles = calculate_num_config_clock_cycles(config_protocol.type(),
fast_configuration,
apply_fast_configuration,
bit_value_to_skip,
bitstream_manager,
fabric_bitstream);
@ -1674,10 +1731,38 @@ void print_verilog_top_testbench(const ModuleManager& module_manager,
op_clock_period,
VERILOG_SIM_TIMESCALE);
/* Identify the stimulus for global reset/set for programming purpose:
* - If only reset port is seen we turn on Reset
* - If only set port is seen we turn on Reset
* - If both reset and set port is defined,
* we pick the one which is consistent with the bit value to be skipped
*/
bool active_global_prog_reset = false;
bool active_global_prog_set = false;
if (!global_prog_reset_ports.empty()) {
active_global_prog_reset = true;
}
if (!global_prog_set_ports.empty()) {
active_global_prog_set = true;
}
/* Ensure that at most only one of the two switches is activated */
if ( (true == active_global_prog_reset)
&& (true == active_global_prog_set) ) {
/* If we will skip logic '0', we will activate programming reset */
active_global_prog_reset = !bit_value_to_skip;
/* If we will skip logic '1', we will activate programming set */
active_global_prog_set = bit_value_to_skip;
}
/* Generate stimuli for global ports or connect them to existed signals */
print_verilog_top_testbench_global_ports_stimuli(fp,
module_manager, top_module,
circuit_lib, global_ports);
circuit_lib, global_ports,
active_global_prog_reset,
active_global_prog_set);
/* Instanciate FPGA top-level module */
print_verilog_testbench_fpga_instance(fp, module_manager, top_module,
@ -1706,8 +1791,8 @@ void print_verilog_top_testbench(const ModuleManager& module_manager,
/* load bitstream to FPGA fabric in a configuration phase */
print_verilog_top_testbench_bitstream(fp, config_protocol.type(),
fast_configuration,
circuit_lib, global_ports,
apply_fast_configuration,
bit_value_to_skip,
module_manager, top_module,
bitstream_manager, fabric_bitstream);