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Merge pull request #167 from lnis-uofu/dev 

Support on Using Scan-chain Flip-flop in Configuration Chain
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tangxifan 2021-01-07 10:00:34 -07:00 committed by GitHub
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1
.github/workflows/basic_reg_test.sh vendored
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@ -14,6 +14,7 @@ python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/config
python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/configuration_chain_use_set --debug --show_thread_logs python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/configuration_chain_use_set --debug --show_thread_logs
python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/configuration_chain_use_setb --debug --show_thread_logs python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/configuration_chain_use_setb --debug --show_thread_logs
python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/configuration_chain_use_set_reset --debug --show_thread_logs python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/configuration_chain_use_set_reset --debug --show_thread_logs
python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/configuration_chain_config_enable_scff --debug --show_thread_logs
python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/multi_region_configuration_chain --debug --show_thread_logs python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/multi_region_configuration_chain --debug --show_thread_logs
python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/fast_configuration_chain --debug --show_thread_logs python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/fast_configuration_chain --debug --show_thread_logs
python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/fast_configuration_chain_use_set --debug --show_thread_logs python3 openfpga_flow/scripts/run_fpga_task.py basic_tests/full_testbench/fast_configuration_chain_use_set --debug --show_thread_logs

96
docs/source/manual/arch_lang/circuit_model_examples.rst
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@ -979,18 +979,18 @@ This example shows:
.. _circuit_model_ccff_example: .. _circuit_model_ccff_example:
Configuration-chain Flip-flop Regular Configuration-chain Flip-flop
````````````````````````````` `````````````````````````````````````
:numref:`fig_ccff` illustrates an example of scan-chain flop-flop used to build a configuration chain. :numref:`fig_ccff_config_chain` illustrates an example of standard flip-flops used to build a configuration chain.
.. _fig_ccff: .. _fig_ccff_config_chain:
.. figure:: ./figures/scff.png .. figure:: ./figures/config_chain.svg
:scale: 50% :scale: 50%
:alt: SCFF symbol :alt: SCFF symbol
An example of a Scan-Chain Flip-Flop. An example of a Flip-Flop organized in a chain.
The code describing this FF is: The code describing this FF is:
@ -999,14 +999,94 @@ The code describing this FF is:
<circuit_model type="ccff" name="ccff" prefix="ccff" verilog_netlist="ccff.v" spice_netlist="ccff.sp"> <circuit_model type="ccff" name="ccff" prefix="ccff" verilog_netlist="ccff.v" spice_netlist="ccff.sp">
<port type="input" prefix="D" size="1"/> <port type="input" prefix="D" size="1"/>
<port type="output" prefix="Q" size="1"/> <port type="output" prefix="Q" size="1"/>
<port type="output" prefix="Qb" size="1"/> <port type="output" prefix="QN" size="1"/>
<port type="clock" prefix="CK" size="1" is_global="true"/> <port type="clock" prefix="CK" size="1" is_global="true" is_prog="true" is_clock="true"/>
</circuit_model> </circuit_model>
This example shows: This example shows:
- A configuration-chain flip-flop which is defined in a Verilog netlist ``ccff.v`` and a SPICE netlist ``ccff.sp`` - A configuration-chain flip-flop which is defined in a Verilog netlist ``ccff.v`` and a SPICE netlist ``ccff.sp``
- The flip-flop has a global clock port, ``CK``, which will be wired a global programming clock - The flip-flop has a global clock port, ``CK``, which will be wired a global programming clock
.. note::
The output ports of the configuration flip-flop must follow a fixed sequence in definition:
- The first output port **MUST** be the data output port, e.g., ``Q``.
- The second output port **MUST** be the **inverted** data output port, e.g., ``QN``.
Configuration-chain Flip-flop with Configure Enable Signals
```````````````````````````````````````````````````````````
Configuration chain could be built with flip-flops with outputs that are enabled by specific signals.
Consider the example in :numref:`fig_ccff_config_chain_config_enable`, the flip-flop has
- a configure enable signal ``CFG_EN`` to release the data output ``Q`` and ``QN``
- a pair of data outputs ``Q`` and ``QN`` which are controlled by the configure enable signal ``CFG_EN``
- a regular data output ``SCAN_Q`` which outputs registered data
.. _fig_ccff_config_chain_config_enable:
.. figure:: ./figures/config_chain_config_enable.svg
:scale: 50%
:alt: SCFF symbol
An example of a Flip-Flop with config enable feature organized in a chain.
The code describing this FF is:
.. code-block:: xml
<circuit_model type="ccff" name="ccff" prefix="ccff" verilog_netlist="ccff.v" spice_netlist="ccff.sp">
<port type="input" prefix="CFG_EN" size="1" is_global="true" is_config_enable="true"/>
<port type="input" prefix="D" size="1"/>
<port type="output" prefix="SCAN_Q" size="1"/>
<port type="output" prefix="QN" size="1"/>
<port type="output" prefix="Q" size="1"/>
<port type="clock" prefix="CK" size="1" is_global="true" is_prog="true" is_clock="true"/>
</circuit_model>
.. note::
The output ports of the configuration flip-flop must follow a fixed sequence in definition:
- The first output port **MUST** be the regular data output port, e.g., ``SCAN_Q``.
- The second output port **MUST** be the **inverted** data output port which is activated by the configure enable signal, e.g., ``QN``.
- The second output port **MUST** be the data output port which is activated by the configure enable signal, e.g., ``Q``.
Configuration-chain Flip-flop with Scan Input
`````````````````````````````````````````````
Configuration chain could be built with flip-flops with a scan chain input .
Consider the example in :numref:`fig_ccff_config_chain_scan_capable`, the flip-flop has
- an additional input ``SI`` to enable scan-chain capabaility
- a configure enable signal ``CFG_EN`` to release the data output ``Q`` and ``QN``
- a pair of data outputs ``Q`` and ``QN`` which are controlled by the configure enable signal ``CFG_EN``
- a regular data output ``SCAN_Q`` which outputs registered data
.. _fig_ccff_config_chain_scan_capable:
.. figure:: ./figures/config_chain_scan_capable.svg
:scale: 50%
:alt: SCFF symbol
An example of a Flip-Flop with scan input organized in a chain.
The code describing this FF is:
.. code-block:: xml
<circuit_model type="ccff" name="ccff" prefix="ccff" verilog_netlist="ccff.v" spice_netlist="ccff.sp">
<port type="input" prefix="CFG_EN" size="1" is_global="true" is_config_enable="true"/>
<port type="input" prefix="D" size="1"/>
<port type="input" prefix="SI" size="1"/>
<port type="output" prefix="SCAN_Q" size="1"/>
<port type="output" prefix="QN" size="1"/>
<port type="output" prefix="Q" size="1"/>
<port type="clock" prefix="CK" size="1" is_global="true" is_prog="true" is_clock="true"/>
</circuit_model>
.. note::
The input ports of the configuration flip-flop must follow a fixed sequence in definition:
- The first input port **MUST** be the regular data input port, e.g., ``D``.
- The second input port **MUST** be the scan input port, e.g., ``SI``.
Hard Logics Hard Logics
~~~~~~~~~~~ ~~~~~~~~~~~

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docs/source/manual/arch_lang/figures/config_chain.svg Normal file
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docs/source/manual/arch_lang/figures/scff.png
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22
libopenfpga/libarchopenfpga/src/check_circuit_library.cpp
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@ -290,17 +290,35 @@ size_t check_ccff_circuit_model_ports(const CircuitLibrary& circuit_lib,
VTR_ASSERT(CIRCUIT_MODEL_CCFF == circuit_lib.model_type(circuit_model)); VTR_ASSERT(CIRCUIT_MODEL_CCFF == circuit_lib.model_type(circuit_model));
/* Check if we have D, Set and Reset */ /* Check if we have D, Set and Reset */
/* We can have either 1 input which is D or 2 inputs which are D and scan input */
size_t num_input_ports = circuit_lib.model_ports_by_type(circuit_model, CIRCUIT_MODEL_PORT_INPUT, true).size();
if ((1 != num_input_ports) && (2 != num_input_ports)) {
VTR_LOG_ERROR("Configuration flip-flop '%s' must have either 1 or 2 %s ports!\n\tAmong which:\n\t\tthe first input is a regular input (e.g., D)\n\t\tand the other could be scan-chain input (e.g., SI)\n",
circuit_lib.model_name(circuit_model).c_str(),
CIRCUIT_MODEL_PORT_TYPE_STRING[size_t(CIRCUIT_MODEL_PORT_INPUT)]);
num_err++;
}
num_err += check_one_circuit_model_port_type_and_size_required(circuit_lib, circuit_model, num_err += check_one_circuit_model_port_type_and_size_required(circuit_lib, circuit_model,
CIRCUIT_MODEL_PORT_INPUT, CIRCUIT_MODEL_PORT_INPUT,
1, 1, false); num_input_ports, 1, false);
/* Check if we have a clock */ /* Check if we have a clock */
num_err += check_one_circuit_model_port_type_and_size_required(circuit_lib, circuit_model, num_err += check_one_circuit_model_port_type_and_size_required(circuit_lib, circuit_model,
CIRCUIT_MODEL_PORT_CLOCK, CIRCUIT_MODEL_PORT_CLOCK,
1, 1, true); 1, 1, true);
/* Check if we have 1 or 2 outputs */ /* Check if we have 1 or 2 or 3 outputs */
size_t num_output_ports = circuit_lib.model_ports_by_type(circuit_model, CIRCUIT_MODEL_PORT_OUTPUT, true).size(); size_t num_output_ports = circuit_lib.model_ports_by_type(circuit_model, CIRCUIT_MODEL_PORT_OUTPUT, true).size();
if ((1 != num_output_ports)
&& (2 != num_output_ports)
&& (3 != num_output_ports)) {
VTR_LOG_ERROR("Configuration flip-flop '%s' must have either 1 or 2 or 3 %s ports!\n\tAmong which:\n\t\tthe first port is the manadatory regular data output (e.g., Q) and \n\t\tthe second port could be the inverted data output which can optionally be enabled by configure-enable signal (e.g., QN or cgf_en_QN) and \n\t\tthe third port could be the data output which can optionally be enabled by configure-enable signal (e.g., cgf_en_Q)\n",
circuit_lib.model_name(circuit_model).c_str(),
CIRCUIT_MODEL_PORT_TYPE_STRING[size_t(CIRCUIT_MODEL_PORT_OUTPUT)]);
num_err++;
}
num_err += check_one_circuit_model_port_type_and_size_required(circuit_lib, circuit_model, num_err += check_one_circuit_model_port_type_and_size_required(circuit_lib, circuit_model,
CIRCUIT_MODEL_PORT_OUTPUT, CIRCUIT_MODEL_PORT_OUTPUT,
num_output_ports, 1, false); num_output_ports, 1, false);

3
libopenfpga/libopenfpgautil/src/openfpga_reserved_words.h
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@ -13,7 +13,10 @@ namespace openfpga {
/* Top-level module name */ /* Top-level module name */
constexpr char* FPGA_TOP_MODULE_NAME = "fpga_top"; constexpr char* FPGA_TOP_MODULE_NAME = "fpga_top";
constexpr char* CONFIGURABLE_MEMORY_CHAIN_IN_NAME = "ccff_head";
constexpr char* CONFIGURABLE_MEMORY_CHAIN_OUT_NAME = "ccff_tail";
constexpr char* CONFIGURABLE_MEMORY_DATA_OUT_NAME = "mem_out"; constexpr char* CONFIGURABLE_MEMORY_DATA_OUT_NAME = "mem_out";
constexpr char* CONFIGURABLE_MEMORY_INVERTED_DATA_OUT_NAME = "mem_outb";
/* IO PORT */ /* IO PORT */
/* Prefix of global input, output and inout ports of FPGA fabric */ /* Prefix of global input, output and inout ports of FPGA fabric */

6
openfpga/src/base/openfpga_naming.cpp
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@ -708,7 +708,7 @@ std::string generate_formal_verification_sram_port_name(const CircuitLibrary& ci
* TODO: This could be replaced as a constexpr string * TODO: This could be replaced as a constexpr string
*********************************************************************/ *********************************************************************/
std::string generate_configuration_chain_head_name() { std::string generate_configuration_chain_head_name() {
return std::string("ccff_head"); return std::string(CONFIGURABLE_MEMORY_CHAIN_IN_NAME);
} }
/********************************************************************* /*********************************************************************
@ -716,7 +716,7 @@ std::string generate_configuration_chain_head_name() {
* TODO: This could be replaced as a constexpr string * TODO: This could be replaced as a constexpr string
*********************************************************************/ *********************************************************************/
std::string generate_configuration_chain_tail_name() { std::string generate_configuration_chain_tail_name() {
return std::string("ccff_tail"); return std::string(CONFIGURABLE_MEMORY_CHAIN_OUT_NAME);
} }
/********************************************************************* /*********************************************************************
@ -732,7 +732,7 @@ std::string generate_configurable_memory_data_out_name() {
* TODO: This could be replaced as a constexpr string * TODO: This could be replaced as a constexpr string
*********************************************************************/ *********************************************************************/
std::string generate_configurable_memory_inverted_data_out_name() { std::string generate_configurable_memory_inverted_data_out_name() {
return std::string("mem_outb"); return std::string(CONFIGURABLE_MEMORY_INVERTED_DATA_OUT_NAME);
} }
/********************************************************************* /*********************************************************************

183
openfpga/src/fabric/build_memory_modules.cpp
View File

@ -77,8 +77,6 @@ void add_module_input_nets_to_mem_modules(ModuleManager& module_manager,
* j-th pin of output port of the i-th child module is wired to the j + i*W -th * j-th pin of output port of the i-th child module is wired to the j + i*W -th
* pin of output port of the memory module, where W is the size of port * pin of output port of the memory module, where W is the size of port
* 3. It assumes fixed port name for output ports * 3. It assumes fixed port name for output ports
*
* We cache the module nets that have been created because they will be used later
********************************************************************/ ********************************************************************/
static static
std::vector<ModuleNetId> add_module_output_nets_to_chain_mem_modules(ModuleManager& module_manager, std::vector<ModuleNetId> add_module_output_nets_to_chain_mem_modules(ModuleManager& module_manager,
@ -165,15 +163,11 @@ void add_module_output_nets_to_mem_modules(ModuleManager& module_manager,
* add_module_nets_cmos_memory_chain_config_bus() !!! * add_module_nets_cmos_memory_chain_config_bus() !!!
*********************************************************************/ *********************************************************************/
static static
void add_module_nets_to_cmos_memory_chain_module(ModuleManager& module_manager, void add_module_nets_to_cmos_memory_config_chain_module(ModuleManager& module_manager,
const ModuleId& parent_module, const ModuleId& parent_module,
const std::vector<ModuleNetId>& output_nets, const CircuitLibrary& circuit_lib,
const CircuitLibrary& circuit_lib, const CircuitPortId& model_input_port,
const CircuitPortId& model_input_port, const CircuitPortId& model_output_port) {
const CircuitPortId& model_output_port) {
/* Counter for the nets */
size_t net_counter = 0;
for (size_t mem_index = 0; mem_index < module_manager.configurable_children(parent_module).size(); ++mem_index) { for (size_t mem_index = 0; mem_index < module_manager.configurable_children(parent_module).size(); ++mem_index) {
ModuleId net_src_module_id; ModuleId net_src_module_id;
size_t net_src_instance_id; size_t net_src_instance_id;
@ -219,21 +213,9 @@ void add_module_nets_to_cmos_memory_chain_module(ModuleManager& module_manager,
/* Create a net for each pin */ /* Create a net for each pin */
for (size_t pin_id = 0; pin_id < net_src_port.pins().size(); ++pin_id) { for (size_t pin_id = 0; pin_id < net_src_port.pins().size(); ++pin_id) {
/* Create a net and add source and sink to it */ /* Create a net and add source and sink to it */
ModuleNetId net; ModuleNetId net = create_module_source_pin_net(module_manager, parent_module, net_src_module_id, net_src_instance_id, net_src_port_id, net_src_port.pins()[pin_id]);
if (0 == mem_index) {
net = module_manager.create_module_net(parent_module);
} else {
net = output_nets[net_counter];
}
/* Add net source */
module_manager.add_module_net_source(parent_module, net, net_src_module_id, net_src_instance_id, net_src_port_id, net_src_port.pins()[pin_id]);
/* Add net sink */ /* Add net sink */
module_manager.add_module_net_sink(parent_module, net, net_sink_module_id, net_sink_instance_id, net_sink_port_id, net_sink_port.pins()[pin_id]); module_manager.add_module_net_sink(parent_module, net, net_sink_module_id, net_sink_instance_id, net_sink_port_id, net_sink_port.pins()[pin_id]);
/* Update net counter */
if (0 < mem_index) {
net_counter++;
}
} }
} }
@ -263,17 +245,90 @@ void add_module_nets_to_cmos_memory_chain_module(ModuleManager& module_manager,
/* Create a net for each pin */ /* Create a net for each pin */
for (size_t pin_id = 0; pin_id < net_src_port.pins().size(); ++pin_id) { for (size_t pin_id = 0; pin_id < net_src_port.pins().size(); ++pin_id) {
/* Create a net and add source and sink to it */ /* Create a net and add source and sink to it */
ModuleNetId net = output_nets[net_counter]; ModuleNetId net = create_module_source_pin_net(module_manager, parent_module, net_src_module_id, net_src_instance_id, net_src_port_id, net_src_port.pins()[pin_id]);
/* Add net source */
module_manager.add_module_net_source(parent_module, net, net_src_module_id, net_src_instance_id, net_src_port_id, net_src_port.pins()[pin_id]);
/* Add net sink */ /* Add net sink */
module_manager.add_module_net_sink(parent_module, net, net_sink_module_id, net_sink_instance_id, net_sink_port_id, net_sink_port.pins()[pin_id]); module_manager.add_module_net_sink(parent_module, net, net_sink_module_id, net_sink_instance_id, net_sink_port_id, net_sink_port.pins()[pin_id]);
/* Update net counter */
net_counter++;
} }
}
VTR_ASSERT(net_counter == output_nets.size()); /********************************************************************
* Connect the scan input of all the memory modules
* under the parent module in a chain
*
* +--------+ +--------+ +--------+
* ccff_head --->| Memory |--->| Memory |--->... --->| Memory |
* | Module | | Module | | Module |
* | [0] | | [1] | | [N-1] |
* +--------+ +--------+ +--------+
* For the 1st memory module:
* net source is the configuration chain head of the primitive module
* net sink is the scan input of the next memory module
*
* For the rest of memory modules:
* net source is the configuration chain tail of the previous memory module
* net sink is the scan input of the next memory module
*
* Note that:
* This function is designed for memory modules ONLY!
* Do not use it to replace the
* add_module_nets_cmos_memory_chain_config_bus() !!!
*********************************************************************/
static
void add_module_nets_to_cmos_memory_scan_chain_module(ModuleManager& module_manager,
const ModuleId& parent_module,
const CircuitLibrary& circuit_lib,
const CircuitPortId& model_input_port,
const CircuitPortId& model_output_port) {
for (size_t mem_index = 0; mem_index < module_manager.configurable_children(parent_module).size(); ++mem_index) {
ModuleId net_src_module_id;
size_t net_src_instance_id;
ModulePortId net_src_port_id;
ModuleId net_sink_module_id;
size_t net_sink_instance_id;
ModulePortId net_sink_port_id;
if (0 == mem_index) {
/* Find the port name of configuration chain head */
std::string src_port_name = generate_configuration_chain_head_name();
net_src_module_id = parent_module;
net_src_instance_id = 0;
net_src_port_id = module_manager.find_module_port(net_src_module_id, src_port_name);
/* Find the port name of next memory module */
std::string sink_port_name = circuit_lib.port_prefix(model_input_port);
net_sink_module_id = module_manager.configurable_children(parent_module)[mem_index];
net_sink_instance_id = module_manager.configurable_child_instances(parent_module)[mem_index];
net_sink_port_id = module_manager.find_module_port(net_sink_module_id, sink_port_name);
} else {
/* Find the port name of previous memory module */
std::string src_port_name = circuit_lib.port_prefix(model_output_port);
net_src_module_id = module_manager.configurable_children(parent_module)[mem_index - 1];
net_src_instance_id = module_manager.configurable_child_instances(parent_module)[mem_index - 1];
net_src_port_id = module_manager.find_module_port(net_src_module_id, src_port_name);
/* Find the port name of next memory module */
std::string sink_port_name = circuit_lib.port_prefix(model_input_port);
net_sink_module_id = module_manager.configurable_children(parent_module)[mem_index];
net_sink_instance_id = module_manager.configurable_child_instances(parent_module)[mem_index];
net_sink_port_id = module_manager.find_module_port(net_sink_module_id, sink_port_name);
}
/* Get the pin id for source port */
BasicPort net_src_port = module_manager.module_port(net_src_module_id, net_src_port_id);
/* Get the pin id for sink port */
BasicPort net_sink_port = module_manager.module_port(net_sink_module_id, net_sink_port_id);
/* Port sizes of source and sink should match */
VTR_ASSERT(net_src_port.get_width() == net_sink_port.get_width());
/* Create a net for each pin */
for (size_t pin_id = 0; pin_id < net_src_port.pins().size(); ++pin_id) {
/* Create a net and add source and sink to it */
ModuleNetId net = create_module_source_pin_net(module_manager, parent_module, net_src_module_id, net_src_instance_id, net_src_port_id, net_src_port.pins()[pin_id]);
/* Add net sink */
module_manager.add_module_net_sink(parent_module, net, net_sink_module_id, net_sink_instance_id, net_sink_port_id, net_sink_port.pins()[pin_id]);
}
}
} }
/********************************************************************* /*********************************************************************
@ -382,7 +437,7 @@ void build_memory_flatten_module(ModuleManager& module_manager,
* scan-chain--->| CCFF |--->| CCFF |--->... --->| CCFF |---->scan-chain * scan-chain--->| CCFF |--->| CCFF |--->... --->| CCFF |---->scan-chain
* input&clock | [0] | | [1] | | [N-1] | output * input&clock | [0] | | [1] | | [N-1] | output
* +-------+ +-------+ +-------+ * +-------+ +-------+ +-------+
* | | ... | * | | ... | config-memory output
* v v v * v v v
* +-----------------------------------------+ * +-----------------------------------------+
* | Multiplexer Configuration port | * | Multiplexer Configuration port |
@ -397,12 +452,15 @@ void build_memory_chain_module(ModuleManager& module_manager,
/* Get the input ports from the SRAM */ /* Get the input ports from the SRAM */
std::vector<CircuitPortId> sram_input_ports = circuit_lib.model_ports_by_type(sram_model, CIRCUIT_MODEL_PORT_INPUT, true); std::vector<CircuitPortId> sram_input_ports = circuit_lib.model_ports_by_type(sram_model, CIRCUIT_MODEL_PORT_INPUT, true);
/* Should have only 1 input port */ /* Should have only 1 or 2 input port */
VTR_ASSERT( 1 == sram_input_ports.size() ); VTR_ASSERT( (1 == sram_input_ports.size())
|| (2 == sram_input_ports.size()) );
/* Get the output ports from the SRAM */ /* Get the output ports from the SRAM */
std::vector<CircuitPortId> sram_output_ports = circuit_lib.model_ports_by_type(sram_model, CIRCUIT_MODEL_PORT_OUTPUT, true); std::vector<CircuitPortId> sram_output_ports = circuit_lib.model_ports_by_type(sram_model, CIRCUIT_MODEL_PORT_OUTPUT, true);
/* Should have only 1 or 2 output port */ /* Should have only 1 or 2 or 3 output port */
VTR_ASSERT( (1 == sram_output_ports.size()) || ( 2 == sram_output_ports.size()) ); VTR_ASSERT( (1 == sram_output_ports.size())
|| (2 == sram_output_ports.size())
|| (3 == sram_output_ports.size()) );
/* Create a module and add to the module manager */ /* Create a module and add to the module manager */
ModuleId mem_module = module_manager.add_module(module_name); ModuleId mem_module = module_manager.add_module(module_name);
@ -428,13 +486,27 @@ void build_memory_chain_module(ModuleManager& module_manager,
circuit_lib.port_size(sram_output_ports[0])); circuit_lib.port_size(sram_output_ports[0]));
module_manager.add_port(mem_module, chain_tail_port, ModuleManager::MODULE_OUTPUT_PORT); module_manager.add_port(mem_module, chain_tail_port, ModuleManager::MODULE_OUTPUT_PORT);
/* Add each output port: port width should match the number of memories */ /* There could be 3 conditions w.r.t. the number of output ports:
for (size_t iport = 0; iport < sram_output_ports.size(); ++iport) { * - Only one output port is defined. In this case, the 1st port is the Q
* In such case, only Q will be considered as data output ports
* - Two output port is defined. In this case, the 1st port is the Q while the 2nd port is the QN
* In such case, both Q and QN will be considered as data output ports
* - Three output port is defined.
* In this case:
* - the 1st port is the Q (the chain output)
* - the 2nd port is the QN (the inverted data output)
* - the 3nd port is the configure-enabled Q
* In such case, configure-enabled Q and QN will be considered as data output ports
*/
size_t num_data_output_ports = sram_output_ports.size();
if (3 == sram_output_ports.size()) {
num_data_output_ports = 2;
}
for (size_t iport = 0; iport < num_data_output_ports; ++iport) {
std::string port_name; std::string port_name;
if (0 == iport) { if (0 == iport) {
port_name = generate_configurable_memory_data_out_name(); port_name = generate_configurable_memory_data_out_name();
} else { } else if (1 == iport) {
VTR_ASSERT( 1 == iport);
port_name = generate_configurable_memory_inverted_data_out_name(); port_name = generate_configurable_memory_inverted_data_out_name();
} }
BasicPort output_port(port_name, num_mems); BasicPort output_port(port_name, num_mems);
@ -444,9 +516,6 @@ void build_memory_chain_module(ModuleManager& module_manager,
/* Find the sram module in the module manager */ /* Find the sram module in the module manager */
ModuleId sram_mem_module = module_manager.find_module(circuit_lib.model_name(sram_model)); ModuleId sram_mem_module = module_manager.find_module(circuit_lib.model_name(sram_model));
/* Cache the output nets for non-inverted data output */
std::vector<ModuleNetId> mem_output_nets;
/* Instanciate each submodule */ /* Instanciate each submodule */
for (size_t i = 0; i < num_mems; ++i) { for (size_t i = 0; i < num_mems; ++i) {
size_t sram_mem_instance = module_manager.num_instance(mem_module, sram_mem_module); size_t sram_mem_instance = module_manager.num_instance(mem_module, sram_mem_module);
@ -454,7 +523,7 @@ void build_memory_chain_module(ModuleManager& module_manager,
module_manager.add_configurable_child(mem_module, sram_mem_module, sram_mem_instance); module_manager.add_configurable_child(mem_module, sram_mem_module, sram_mem_instance);
/* Build module nets to wire outputs of sram modules to outputs of memory module */ /* Build module nets to wire outputs of sram modules to outputs of memory module */
for (size_t iport = 0; iport < sram_output_ports.size(); ++iport) { for (size_t iport = 0; iport < num_data_output_ports; ++iport) {
std::string port_name; std::string port_name;
if (0 == iport) { if (0 == iport) {
port_name = generate_configurable_memory_data_out_name(); port_name = generate_configurable_memory_data_out_name();
@ -462,20 +531,32 @@ void build_memory_chain_module(ModuleManager& module_manager,
VTR_ASSERT( 1 == iport); VTR_ASSERT( 1 == iport);
port_name = generate_configurable_memory_inverted_data_out_name(); port_name = generate_configurable_memory_inverted_data_out_name();
} }
/* Find the proper data output port
* The exception is when there are 3 output ports defined
* The 3rd port is the regular data output port to be used
*/
CircuitPortId data_output_port_to_connect = sram_output_ports[iport];
if ((3 == sram_output_ports.size()) && (0 == iport)) {
data_output_port_to_connect = sram_output_ports.back();
}
std::vector<ModuleNetId> output_nets = add_module_output_nets_to_chain_mem_modules(module_manager, mem_module, std::vector<ModuleNetId> output_nets = add_module_output_nets_to_chain_mem_modules(module_manager, mem_module,
port_name, circuit_lib, sram_output_ports[iport], port_name, circuit_lib, data_output_port_to_connect,
sram_mem_module, i, sram_mem_instance); sram_mem_module, i, sram_mem_instance);
/* Cache only for regular data outputs */
if (0 == iport) {
mem_output_nets.insert(mem_output_nets.end(), output_nets.begin(), output_nets.end());
}
} }
} }
/* Build module nets to wire the configuration chain */ /* Build module nets to wire the configuration chain */
add_module_nets_to_cmos_memory_chain_module(module_manager, mem_module, mem_output_nets, add_module_nets_to_cmos_memory_config_chain_module(module_manager, mem_module,
circuit_lib, sram_input_ports[0], sram_output_ports[0]); circuit_lib, sram_input_ports[0], sram_output_ports[0]);
/* If there is a second input defined,
* add nets to short wire the 2nd inputs to the first inputs
*/
if (2 == sram_input_ports.size()) {
add_module_nets_to_cmos_memory_scan_chain_module(module_manager, mem_module,
circuit_lib, sram_input_ports[1], sram_output_ports[0]);
}
/* Add global ports to the pb_module: /* Add global ports to the pb_module:
* This is a much easier job after adding sub modules (instances), * This is a much easier job after adding sub modules (instances),

194
openfpga_flow/openfpga_arch/k4_N4_40nm_cc_cfgscff_openfpga.xml Normal file
View File

@ -0,0 +1,194 @@
<!-- Architecture annotation for OpenFPGA framework
This annotation supports the k6_N10_40nm.xml
- General purpose logic block
- K = 6, N = 10, I = 40
- Single mode
- Routing architecture
- L = 4, fc_in = 0.15, fc_out = 0.1
-->
<openfpga_architecture>
<technology_library>
<device_library>
<device_model name="logic" type="transistor">
<lib type="industry" corner="TOP_TT" ref="M" path="${OPENFPGA_PATH}/openfpga_flow/tech/PTM_45nm/45nm.pm"/>
<design vdd="0.9" pn_ratio="2"/>
<pmos name="pch" chan_length="40e-9" min_width="140e-9" variation="logic_transistor_var"/>
<nmos name="nch" chan_length="40e-9" min_width="140e-9" variation="logic_transistor_var"/>
</device_model>
<device_model name="io" type="transistor">
<lib type="academia" ref="M" path="${OPENFPGA_PATH}/openfpga_flow/tech/PTM_45nm/45nm.pm"/>
<design vdd="2.5" pn_ratio="3"/>
<pmos name="pch_25" chan_length="270e-9" min_width="320e-9" variation="io_transistor_var"/>
<nmos name="nch_25" chan_length="270e-9" min_width="320e-9" variation="io_transistor_var"/>
</device_model>
</device_library>
<variation_library>
<variation name="logic_transistor_var" abs_deviation="0.1" num_sigma="3"/>
<variation name="io_transistor_var" abs_deviation="0.1" num_sigma="3"/>
</variation_library>
</technology_library>
<circuit_library>
<circuit_model type="inv_buf" name="INVTX1" prefix="INVTX1" is_default="true">
<design_technology type="cmos" topology="inverter" size="1"/>
<device_technology device_model_name="logic"/>
<port type="input" prefix="in" size="1"/>
<port type="output" prefix="out" size="1"/>
<delay_matrix type="rise" in_port="in" out_port="out">
10e-12
</delay_matrix>
<delay_matrix type="fall" in_port="in" out_port="out">
10e-12
</delay_matrix>
</circuit_model>
<circuit_model type="inv_buf" name="buf4" prefix="buf4" is_default="false">
<design_technology type="cmos" topology="buffer" size="1" num_level="2" f_per_stage="4"/>
<device_technology device_model_name="logic"/>
<port type="input" prefix="in" size="1"/>
<port type="output" prefix="out" size="1"/>
<delay_matrix type="rise" in_port="in" out_port="out">
10e-12
</delay_matrix>
<delay_matrix type="fall" in_port="in" out_port="out">
10e-12
</delay_matrix>
</circuit_model>
<circuit_model type="inv_buf" name="tap_buf4" prefix="tap_buf4" is_default="false">
<design_technology type="cmos" topology="buffer" size="1" num_level="3" f_per_stage="4"/>
<device_technology device_model_name="logic"/>
<port type="input" prefix="in" size="1"/>
<port type="output" prefix="out" size="1"/>
<delay_matrix type="rise" in_port="in" out_port="out">
10e-12
</delay_matrix>
<delay_matrix type="fall" in_port="in" out_port="out">
10e-12
</delay_matrix>
</circuit_model>
<circuit_model type="pass_gate" name="TGATE" prefix="TGATE" is_default="true">
<design_technology type="cmos" topology="transmission_gate" nmos_size="1" pmos_size="2"/>
<device_technology device_model_name="logic"/>
<input_buffer exist="false"/>
<output_buffer exist="false"/>
<port type="input" prefix="in" size="1"/>
<port type="input" prefix="sel" size="1"/>
<port type="input" prefix="selb" size="1"/>
<port type="output" prefix="out" size="1"/>
<delay_matrix type="rise" in_port="in sel selb" out_port="out">
10e-12 5e-12 5e-12
</delay_matrix>
<delay_matrix type="fall" in_port="in sel selb" out_port="out">
10e-12 5e-12 5e-12
</delay_matrix>
</circuit_model>
<circuit_model type="chan_wire" name="chan_segment" prefix="track_seg" is_default="true">
<design_technology type="cmos"/>
<input_buffer exist="false"/>
<output_buffer exist="false"/>
<port type="input" prefix="in" size="1"/>
<port type="output" prefix="out" size="1"/>
<wire_param model_type="pi" R="101" C="22.5e-15" num_level="1"/> <!-- model_type could be T, res_val and cap_val DON'T CARE -->
</circuit_model>
<circuit_model type="wire" name="direct_interc" prefix="direct_interc" is_default="true">
<design_technology type="cmos"/>
<input_buffer exist="false"/>
<output_buffer exist="false"/>
<port type="input" prefix="in" size="1"/>
<port type="output" prefix="out" size="1"/>
<wire_param model_type="pi" R="0" C="0" num_level="1"/> <!-- model_type could be T, res_val cap_val should be defined -->
</circuit_model>
<circuit_model type="mux" name="mux_tree" prefix="mux_tree" dump_structural_verilog="true">
<design_technology type="cmos" structure="tree" add_const_input="true" const_input_val="1"/>
<input_buffer exist="true" circuit_model_name="INVTX1"/>
<output_buffer exist="true" circuit_model_name="INVTX1"/>
<pass_gate_logic circuit_model_name="TGATE"/>
<port type="input" prefix="in" size="1"/>
<port type="output" prefix="out" size="1"/>
<port type="sram" prefix="sram" size="1"/>
</circuit_model>
<circuit_model type="mux" name="mux_tree_tapbuf" prefix="mux_tree_tapbuf" is_default="true" dump_structural_verilog="true">
<design_technology type="cmos" structure="tree" add_const_input="true" const_input_val="1"/>
<input_buffer exist="true" circuit_model_name="INVTX1"/>
<output_buffer exist="true" circuit_model_name="tap_buf4"/>
<pass_gate_logic circuit_model_name="TGATE"/>
<port type="input" prefix="in" size="1"/>
<port type="output" prefix="out" size="1"/>
<port type="sram" prefix="sram" size="1"/>
</circuit_model>
<!--DFF subckt ports should be defined as <D> <Q> <CLK> <RESET> <SET> -->
<circuit_model type="ff" name="DFFSRQ" prefix="DFFSRQ" spice_netlist="${OPENFPGA_PATH}/openfpga_flow/openfpga_cell_library/spice/dff.sp" verilog_netlist="${OPENFPGA_PATH}/openfpga_flow/openfpga_cell_library/verilog/dff.v">
<design_technology type="cmos"/>
<input_buffer exist="true" circuit_model_name="INVTX1"/>
<output_buffer exist="true" circuit_model_name="INVTX1"/>
<port type="input" prefix="D" size="1"/>
<port type="input" prefix="set" lib_name="SET" size="1" is_global="true" default_val="0" is_set="true"/>
<port type="input" prefix="reset" lib_name="RST" size="1" is_global="true" default_val="0" is_reset="true"/>
<port type="output" prefix="Q" size="1"/>
<port type="clock" prefix="clk" lib_name="CK" size="1" is_global="true" default_val="0" />
</circuit_model>
<circuit_model type="lut" name="lut4" prefix="lut4" dump_structural_verilog="true">
<design_technology type="cmos"/>
<input_buffer exist="true" circuit_model_name="INVTX1"/>
<output_buffer exist="true" circuit_model_name="INVTX1"/>
<lut_input_inverter exist="true" circuit_model_name="INVTX1"/>
<lut_input_buffer exist="true" circuit_model_name="buf4"/>
<pass_gate_logic circuit_model_name="TGATE"/>
<port type="input" prefix="in" size="4"/>
<port type="output" prefix="out" size="1"/>
<port type="sram" prefix="sram" size="16"/>
</circuit_model>
<!--Scan-chain DFF subckt ports should be defined as <D> <Q> <Qb> <CLK> <RESET> <SET> -->
<circuit_model type="ccff" name="CFGSDFFR" prefix="CFGSDFFR" spice_netlist="${OPENFPGA_PATH}/openfpga_flow/openfpga_cell_library/spice/dff.sp" verilog_netlist="${OPENFPGA_PATH}/openfpga_flow/openfpga_cell_library/verilog/dff.v">
<design_technology type="cmos"/>
<input_buffer exist="true" circuit_model_name="INVTX1"/>
<output_buffer exist="true" circuit_model_name="INVTX1"/>
<port type="input" prefix="pReset" lib_name="RST" size="1" is_global="true" default_val="0" is_reset="true" is_prog="true"/>
<port type="input" prefix="SE" size="1" is_global="true" default_val="0"/>
<port type="input" prefix="config_enable" lib_name="CFGE" size="1" is_global="true" default_val="0" is_config_enable="true"/>
<port type="input" prefix="D" size="1"/>
<port type="input" prefix="SI" size="1"/>
<port type="output" prefix="Q" size="1"/>
<port type="output" prefix="CFGQN" size="1"/>
<port type="output" prefix="CFGQ" size="1"/>
<port type="clock" prefix="prog_clk" lib_name="CK" size="1" is_global="true" default_val="0" is_prog="true"/>
</circuit_model>
<circuit_model type="iopad" name="GPIO" prefix="GPIO" spice_netlist="${OPENFPGA_PATH}/openfpga_flow/openfpga_cell_library/spice/gpio.sp" verilog_netlist="${OPENFPGA_PATH}/openfpga_flow/openfpga_cell_library/verilog/gpio.v">
<design_technology type="cmos"/>
<input_buffer exist="true" circuit_model_name="INVTX1"/>
<output_buffer exist="true" circuit_model_name="INVTX1"/>
<port type="inout" prefix="PAD" size="1" is_global="true" is_io="true" is_data_io="true"/>
<port type="sram" prefix="DIR" size="1" mode_select="true" circuit_model_name="CFGSDFFR" default_val="1"/>
<port type="input" prefix="outpad" lib_name="A" size="1"/>
<port type="output" prefix="inpad" lib_name="Y" size="1"/>
</circuit_model>
</circuit_library>
<configuration_protocol>
<organization type="scan_chain" circuit_model_name="CFGSDFFR"/>
</configuration_protocol>
<connection_block>
<switch name="ipin_cblock" circuit_model_name="mux_tree_tapbuf"/>
</connection_block>
<switch_block>
<switch name="0" circuit_model_name="mux_tree_tapbuf"/>
</switch_block>
<routing_segment>
<segment name="L4" circuit_model_name="chan_segment"/>
</routing_segment>
<pb_type_annotations>
<!-- physical pb_type binding in complex block IO -->
<pb_type name="io" physical_mode_name="physical" idle_mode_name="inpad"/>
<pb_type name="io[physical].iopad" circuit_model_name="GPIO" mode_bits="1"/>
<pb_type name="io[inpad].inpad" physical_pb_type_name="io[physical].iopad" mode_bits="1"/>
<pb_type name="io[outpad].outpad" physical_pb_type_name="io[physical].iopad" mode_bits="0"/>
<!-- End physical pb_type binding in complex block IO -->
<!-- physical pb_type binding in complex block CLB -->
<!-- physical mode will be the default mode if not specified -->
<pb_type name="clb">
<!-- Binding interconnect to circuit models as their physical implementation, if not defined, we use the default model -->
<interconnect name="crossbar" circuit_model_name="mux_tree"/>
</pb_type>
<pb_type name="clb.fle[n1_lut4].ble4.lut4" circuit_model_name="lut4"/>
<pb_type name="clb.fle[n1_lut4].ble4.ff" circuit_model_name="DFFSRQ"/>
<!-- End physical pb_type binding in complex block IO -->
</pb_type_annotations>
</openfpga_architecture>

47
openfpga_flow/openfpga_cell_library/verilog/dff.v
View File

@ -397,3 +397,50 @@ end
assign Q = q_reg; assign Q = q_reg;
endmodule //End Of Module endmodule //End Of Module
//-----------------------------------------------------
// Function : D-type flip-flop with
// - asynchronous active high reset
// - scan-chain input
// - a scan-chain enable
// - a configure enable, when enabled the registered output will
// be released to the Q
//-----------------------------------------------------
module CFGSDFFR (
input RST, // Reset input
input CK, // Clock Input
input SE, // Scan-chain Enable
input D, // Data Input
input SI, // Scan-chain input
input CFGE, // Configure enable
output Q, // Regular Q output
output CFGQ, // Data Q output which is released when configure enable is activated
output CFGQN // Data Qb output which is released when configure enable is activated
);
//------------Internal Variables--------
reg q_reg;
wire QN;
//-------------Code Starts Here---------
always @ ( posedge CK or posedge RST)
if (RST) begin
q_reg <= 1'b0;
end else if (SE) begin
q_reg <= SI;
end else begin
q_reg <= D;
end
assign CFGQ = CFGE ? Q : 1'b0;
assign CFGQN = CFGE ? QN : 1'b1;
`ifndef ENABLE_FORMAL_VERIFICATION
// Wire q_reg to Q
assign Q = q_reg;
assign QN = !Q;
`else
assign Q = 1'bZ;
assign QN = !Q;
`endif
endmodule //End Of Module

42
openfpga_flow/tasks/basic_tests/full_testbench/configuration_chain_config_enable_scff/config/task.conf Normal file
View File

@ -0,0 +1,42 @@
# = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
# Configuration file for running experiments
# = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
# timeout_each_job : FPGA Task script splits fpga flow into multiple jobs
# Each job execute fpga_flow script on combination of architecture & benchmark
# timeout_each_job is timeout for each job
# = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
[GENERAL]
run_engine=openfpga_shell
power_tech_file = ${PATH:OPENFPGA_PATH}/openfpga_flow/tech/PTM_45nm/45nm.xml
power_analysis = true
spice_output=false
verilog_output=true
timeout_each_job = 1*60
fpga_flow=yosys_vpr
[OpenFPGA_SHELL]
openfpga_shell_template=${PATH:OPENFPGA_PATH}/openfpga_flow/openfpga_shell_scripts/configuration_chain_example_script.openfpga
openfpga_arch_file=${PATH:OPENFPGA_PATH}/openfpga_flow/openfpga_arch/k4_N4_40nm_cc_cfgscff_openfpga.xml
openfpga_sim_setting_file=${PATH:OPENFPGA_PATH}/openfpga_flow/openfpga_simulation_settings/auto_sim_openfpga.xml
[ARCHITECTURES]
arch0=${PATH:OPENFPGA_PATH}/openfpga_flow/vpr_arch/k4_N4_tileable_40nm.xml
[BENCHMARKS]
bench0=${PATH:OPENFPGA_PATH}/openfpga_flow/benchmarks/micro_benchmark/and2/and2.v
bench1=${PATH:OPENFPGA_PATH}/openfpga_flow/benchmarks/micro_benchmark/or2/or2.v
bench2=${PATH:OPENFPGA_PATH}/openfpga_flow/benchmarks/micro_benchmark/and2_latch/and2_latch.v
[SYNTHESIS_PARAM]
bench0_top = and2
bench0_chan_width = 300
bench1_top = or2
bench1_chan_width = 300
bench2_top = and2_latch
bench2_chan_width = 300
[SCRIPT_PARAM_MIN_ROUTE_CHAN_WIDTH]
end_flow_with_test=