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HanySalah |
//------------------------------------------------------------
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// Copyright 2007-2010 Mentor Graphics Corporation
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// All Rights Reserved Worldwide
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//
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// Licensed under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in
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// compliance with the License. You may obtain a copy of
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// the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in
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// writing, software distributed under the License is
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// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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// CONDITIONS OF ANY KIND, either express or implied. See
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// the License for the specific language governing
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// permissions and limitations under the License.
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//------------------------------------------------------------
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// TITLE: UVM HDL Backdoor Access support routines.
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//
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// These routines provide an interface to the DPI/PLI
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// implementation of backdoor access used by registers.
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//
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// If you DON'T want to use the DPI HDL API, then compile your
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// SystemVerilog code with the vlog switch
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//: vlog ... +define+UVM_HDL_NO_DPI ...
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//
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`ifndef UVM_HDL__SVH
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`define UVM_HDL__SVH
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`ifndef UVM_HDL_MAX_WIDTH
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`define UVM_HDL_MAX_WIDTH 1024
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`endif
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/*
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* VARIABLE: UVM_HDL_MAX_WIDTH
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* Sets the maximum size bit vector for backdoor access.
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* This parameter will be looked up by the
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* DPI-C code using:
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* vpi_handle_by_name(
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* "uvm_pkg::UVM_HDL_MAX_WIDTH", 0);
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*/
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parameter int UVM_HDL_MAX_WIDTH = `UVM_HDL_MAX_WIDTH;
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typedef logic [UVM_HDL_MAX_WIDTH-1:0] uvm_hdl_data_t;
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`ifndef UVM_HDL_NO_DPI
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// Function: uvm_hdl_check_path
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//
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// Checks that the given HDL ~path~ exists. Returns 0 if NOT found, 1 otherwise.
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//
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import "DPI-C" context function int uvm_hdl_check_path(string path);
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// Function: uvm_hdl_deposit
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//
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// Sets the given HDL ~path~ to the specified ~value~.
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// Returns 1 if the call succeeded, 0 otherwise.
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//
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import "DPI-C" context function int uvm_hdl_deposit(string path, uvm_hdl_data_t value);
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// Function: uvm_hdl_force
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//
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// Forces the ~value~ on the given ~path~. Returns 1 if the call succeeded, 0 otherwise.
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//
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import "DPI-C" context function int uvm_hdl_force(string path, uvm_hdl_data_t value);
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// Function: uvm_hdl_force_time
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//
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// Forces the ~value~ on the given ~path~ for the specified amount of ~force_time~.
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// If ~force_time~ is 0, is called.
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// Returns 1 if the call succeeded, 0 otherwise.
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//
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task uvm_hdl_force_time(string path, uvm_hdl_data_t value, time force_time = 0);
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if (force_time == 0) begin
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void'(uvm_hdl_deposit(path, value));
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return;
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end
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if (!uvm_hdl_force(path, value))
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return;
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#force_time;
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void'(uvm_hdl_release_and_read(path, value));
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endtask
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// Function: uvm_hdl_release_and_read
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//
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// Releases a value previously set with .
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// Returns 1 if the call succeeded, 0 otherwise. ~value~ is set to
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// the HDL value after the release. For 'reg', the value will still be
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// the forced value until it has been procedurally reassigned. For 'wire',
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// the value will change immediately to the resolved value of its
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// continuous drivers, if any. If none, its value remains as forced until
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// the next direct assignment.
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//
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import "DPI-C" context function int uvm_hdl_release_and_read(string path, inout uvm_hdl_data_t value);
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// Function: uvm_hdl_release
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//
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// Releases a value previously set with .
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// Returns 1 if the call succeeded, 0 otherwise.
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//
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import "DPI-C" context function int uvm_hdl_release(string path);
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// Function: uvm_hdl_read()
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//
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// Gets the value at the given ~path~.
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// Returns 1 if the call succeeded, 0 otherwise.
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//
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import "DPI-C" context function int uvm_hdl_read(string path, output uvm_hdl_data_t value);
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`else
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function int uvm_hdl_check_path(string path);
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uvm_report_fatal("UVM_HDL_CHECK_PATH",
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$sformatf("uvm_hdl DPI routines are compiled off. Recompile without +define+UVM_HDL_NO_DPI"));
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return 0;
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endfunction
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function int uvm_hdl_deposit(string path, uvm_hdl_data_t value);
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uvm_report_fatal("UVM_HDL_DEPOSIT",
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$sformatf("uvm_hdl DPI routines are compiled off. Recompile without +define+UVM_HDL_NO_DPI"));
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return 0;
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endfunction
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function int uvm_hdl_force(string path, uvm_hdl_data_t value);
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uvm_report_fatal("UVM_HDL_FORCE",
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$sformatf("uvm_hdl DPI routines are compiled off. Recompile without +define+UVM_HDL_NO_DPI"));
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return 0;
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endfunction
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task uvm_hdl_force_time(string path, uvm_hdl_data_t value, time force_time=0);
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uvm_report_fatal("UVM_HDL_FORCE_TIME",
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$sformatf("uvm_hdl DPI routines are compiled off. Recompile without +define+UVM_HDL_NO_DPI"));
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endtask
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function int uvm_hdl_release(string path, output uvm_hdl_data_t value);
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uvm_report_fatal("UVM_HDL_RELEASE",
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$sformatf("uvm_hdl DPI routines are compiled off. Recompile without +define+UVM_HDL_NO_DPI"));
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return 0;
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endfunction
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function int uvm_hdl_read(string path, output uvm_hdl_data_t value);
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uvm_report_fatal("UVM_HDL_READ",
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$sformatf("uvm_hdl DPI routines are compiled off. Recompile without +define+UVM_HDL_NO_DPI"));
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return 0;
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endfunction
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`endif
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`endif
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