Issue with the constraints file

[Mar486]

Hi,

I have a problem regarding the constraints file.
DC compiler gives me warnings regarding these two lines in the constraint file:

set all_other_input_ports [remove_from_collection [all_inputs] [get_ports [list $all_clock_ports $obi_input_ports $irq_input_ports $early_input_ports]]]
set all_other_output_ports [remove_from_collection [all_outputs] [get_ports [list $all_clock_ports $obi_output_ports $sleep_output_ports $irq_output_ports]]]

the warnings:

Warning: Can't find ports matching 'instr_gnt_i instr_rvalid_i instr_rdata_i* data_gnt_i data_rvalid_i data_rdata_i*' in design 'cv32e40p_core'. (UID-95)
Warning: Can't find ports matching 'debug_req_i boot_addr_i* mtvec_addr_i* dm_halt_addr_i* hart_id_i* dm_exception_addr_i*' in design 'cv32e40p_core'. (UID-95)
Warning: Can't find ports matching 'instr_req_o instr_addr_o* data_req_o data_we_o data_be_o* data_addr_o* data_wdata_o*' in design 'cv32e40p_core'. (UID-95)
Warning: Can't find ports matching 'irq_ack_o irq_id_o*' in design 'cv32e40p_core'. (UID-95)

[davideschiavone]

hello @Mar486 , can you please provide what are all the commands you type in DC?

[Mar486]

hello @Mar486 , can you please provide what are all the commands you type in DC?

1. reading the libraries.
2. analyze the RTL files ordered according to the manifest file.
3. elaborate.
4. current_design
5. reading the constraints file (sdc file).
6. link
7. compile_ultra

[zorrolee777]

Hi,

Has this been fixed? I got similar issues.

[zorrolee777]

And I also saw there's a draft version DC script here: #305
Is there any complete version? Thanks!

[Silabs-ArjanB]

@zorrolee777 We do not have the intention to provide synthesis scripts for specific vendors, just example constraints. (I don't know if the stated issue has been fixed; I do not have access to the stated tool.)

[zorrolee777]

hello @Mar486 , can you please provide what are all the commands you type in DC?

1. reading the libraries.
2. analyze the RTL files ordered according to the manifest file.
3. elaborate.
4. current_design
5. reading the constraints file (sdc file).
6. link
7. compile_ultra

Hello @Mar486. Any luck to fix this?

[Mar486]

Hi,

Has this been fixed? I got similar issues.

I replaced these two lines by the following lines:

set f [all_inputs]
set a [get_ports $all_clock_ports]
set b [get_ports $obi_input_ports]
set c [get_ports $irq_input_ports]
set d [get_ports $early_input_ports]

set a_b [add_to_coll $a $b]
set abc [add_to_coll $a_b $c]
set abcd [add_to_coll $abc $d]

set all_other_input_ports [remove_from_coll $f $abcd]

set q [all_outputs]
set m [get_ports $all_clock_ports]
set n [get_ports $obi_output_ports]
set o [get_ports $sleep_output_ports]
set p [get_ports $irq_output_ports]

set m_n [add_to_coll $m $n]
set mno [add_to_coll $m_n $o]
set mnop [add_to_coll $mno $p]

set all_other_output_ports [remove_from_coll $q $mnop]

[davideschiavone]

can you please provide more details about the points 1 to 6? I would need to replicate your commands to understand the issue

[MikeOpenHWGroup]

@Mar486, would it be possible for you to share your script?

[Mar486]

can you please provide more details about the points 1 to 6? I would need to replicate your commands to understand the issue

@Mar486, would it be possible for you to share your script?

set design cv32e40p_core

set_app_var search_path "/home/standard_cell_libraries/NangateOpenCellLibrary_PDKv1_3_v2010_12/lib/Front_End/Liberty/NLDM"

set_app_var link_library "* NangateOpenCellLibrary_ss0p95vn40c.db"
set_app_var target_library "NangateOpenCellLibrary_ss0p95vn40c.db"

sh rm -rf work
sh mkdir -p work
define_design_lib work -path ./work
set hdlin_sverilog_std 2009

analyze -library work -format sverilog ../rtl/cv32e40p_register_file_latch.sv
analyze -library work -format sverilog ../rtl/include/cv32e40p_apu_core_pkg.sv
analyze -library work -format sverilog ../rtl/include/cv32e40p_pkg.sv
analyze -library work -format sverilog ../rtl/include/cv32e40p_fpu_pkg.sv
analyze -library work -format sverilog ../bhv/include/cv32e40p_tracer_pkg.sv

analyze -library work -format sverilog ../rtl/cv32e40p_alu.sv
analyze -library work -format sverilog ../rtl/cv32e40p_alu_div.sv
analyze -library work -format sverilog ../rtl/cv32e40p_ff_one.sv
analyze -library work -format sverilog ../rtl/cv32e40p_popcnt.sv
analyze -library work -format sverilog ../rtl/cv32e40p_compressed_decoder.sv
analyze -library work -format sverilog ../rtl/cv32e40p_controller.sv
analyze -library work -format sverilog ../rtl/cv32e40p_cs_registers.sv
analyze -library work -format sverilog ../rtl/cv32e40p_decoder.sv
analyze -library work -format sverilog ../rtl/cv32e40p_int_controller.sv
analyze -library work -format sverilog ../rtl/cv32e40p_ex_stage.sv
analyze -library work -format sverilog ../rtl/cv32e40p_hwloop_regs.sv
analyze -library work -format sverilog ../rtl/cv32e40p_id_stage.sv
analyze -library work -format sverilog ../rtl/cv32e40p_if_stage.sv
analyze -library work -format sverilog ../rtl/cv32e40p_load_store_unit.sv
analyze -library work -format sverilog ../rtl/cv32e40p_mult.sv
analyze -library work -format sverilog ../rtl/cv32e40p_prefetch_buffer.sv
analyze -library work -format sverilog ../rtl/cv32e40p_prefetch_controller.sv
analyze -library work -format sverilog ../rtl/cv32e40p_obi_interface.sv
analyze -library work -format sverilog ../rtl/cv32e40p_aligner.sv
analyze -library work -format sverilog ../rtl/cv32e40p_sleep_unit.sv
analyze -library work -format sverilog ../rtl/cv32e40p_core.sv
analyze -library work -format sverilog ../rtl/cv32e40p_apu_disp.sv
analyze -library work -format sverilog ../rtl/cv32e40p_fifo.sv

analyze -library work -format sverilog ../bhv/cv32e40p_sim_clock_gate.sv
analyze -library work -format sverilog ../bhv/cv32e40p_wrapper.sv

elaborate $design -lib work
current_design

check_design

source ./cons/cv32e40p_core.sdc
link

compile_ultra -timing_high_effort_script