Subversion Repositories uart2bus_testbench

//

//-----------------------------------------------------------------------------

//   Copyright 2007-2011 Mentor Graphics Corporation

//   Copyright 2007-2011 Cadence Design Systems, Inc.

//   Copyright 2010 Synopsys, Inc.

//   Copyright 2013 NVIDIA Corporation

//   All Rights Reserved Worldwide

//

//   Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0

//

//   Unless required by applicable law or agreed to in

//   writing, software distributed under the License is

//   distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR

//   CONDITIONS OF ANY KIND, either express or implied.  See

//   the License for the specific language governing

//   permissions and limitations under the License.

//-----------------------------------------------------------------------------

typedef class uvm_report_message;

// File: UVM Recorders

//

// The uvm_recorder class serves two purposes:

//  - Firstly, it is an abstract representation of a record within a

//    .

//  - Secondly, it is a policy object for recording fields ~into~ that

//    record within the ~stream~.

//

//------------------------------------------------------------------------------

//

// CLASS: uvm_recorder

//

// Abstract class which defines the ~recorder~ API.

//

//------------------------------------------------------------------------------

virtual class uvm_recorder extends uvm_object;

  // Variable- m_stream_dap

  // Data access protected reference to the stream

  local uvm_set_before_get_dap#(uvm_tr_stream) m_stream_dap;

  // Variable- m_warn_null_stream

  // Used to limit the number of warnings

  local bit m_warn_null_stream;

  // Variable- m_is_opened

  // Used to indicate recorder is open

  local bit m_is_opened;

  // Variable- m_is_closed

  // Used to indicate recorder is closed

  local bit m_is_closed;

  // !m_is_opened && !m_is_closed == m_is_freed

  // Variable- m_open_time

  // Used to store the open_time

  local time m_open_time;

  // Variable- m_close_time

  // Used to store the close_time

  local time m_close_time;

  // Variable- recording_depth

  int recording_depth;

  // Variable: default_radix

  //

  // This is the default radix setting if  is called without

  // a radix.

  uvm_radix_enum default_radix = UVM_HEX;

  // Variable: physical

  //

  // This bit provides a filtering mechanism for fields.

  //

  // The  and physical settings allow an object to distinguish between

  // two different classes of fields.

  //

  // It is up to you, in the  method, to test the

  // setting of this field if you want to use the physical trait as a filter.

  bit physical = 1;

  // Variable: abstract

  //

  // This bit provides a filtering mechanism for fields.

  //

  // The abstract and physical settings allow an object to distinguish between

  // two different classes of fields.

  //

  // It is up to you, in the  method, to test the

  // setting of this field if you want to use the abstract trait as a filter.

  bit abstract = 1;

  // Variable: identifier

  //

  // This bit is used to specify whether or not an object's reference should be

  // recorded when the object is recorded.

  bit identifier = 1;

  // Variable: recursion_policy

  //

  // Sets the recursion policy for recording objects.

  //

  // The default policy is deep (which means to recurse an object).

  uvm_recursion_policy_enum policy = UVM_DEFAULT_POLICY;

   // Variable- m_ids_by_recorder

   // An associative array of integers, indexed by uvm_recorders.  This

   // provides a unique 'id' or 'handle' for each recorder, which can be

   // used to identify the recorder.

   //

   // By default, neither ~m_ids_by_recorder~ or ~m_recorders_by_id~ are

   // used.  Recorders are only placed in the arrays when the user

   // attempts to determine the id for a recorder.

   local static integer m_ids_by_recorder[uvm_recorder];

  function new(string name = "uvm_recorder");

     super.new(name);

     m_stream_dap = new("stream_dap");

     m_warn_null_stream = 1;

  endfunction

   // Group: Configuration API

   // Function: get_stream

   // Returns a reference to the stream which created

   // this record.

   //

   // A warning will be asserted if get_stream is called prior

   // to the record being initialized via .

   //

   function uvm_tr_stream get_stream();

      if (!m_stream_dap.try_get(get_stream)) begin

         if (m_warn_null_stream == 1)

           `uvm_warning("UVM/REC/NO_CFG",

                        $sformatf("attempt to retrieve STREAM from '%s' before it was set!",

                                  get_name()))

         m_warn_null_stream = 0;

      end

   endfunction : get_stream

   // Group: Transaction Recorder API

   //

   // Once a recorder has been opened via , the user

   // can ~close~ the recorder.

   //

   // Due to the fact that many database implementations will require crossing

   // a language boundary, an additional step of ~freeing~ the recorder is required.

   //

   // A ~link~ can be established within the database any time between ~open~ and

   // ~free~, however it is illegal to establish a link after ~freeing~ the recorder.

   //

   // Function: close

   // Closes this recorder.

   //

   // Closing a recorder marks the end of the transaction in the stream.

   //

   // Parameters:

   // close_time - Optional time to record as the closing time of this transaction.

   //

   // This method will trigger a  call.

   function void close(time close_time = 0);

      if (close_time == 0)

        close_time = $realtime;

      if (!is_open())

        return;

      do_close(close_time);

      m_is_opened = 0;

      m_is_closed = 1;

      m_close_time = close_time;

   endfunction : close

   // Function: free

   // Frees this recorder

   //

   // Freeing a recorder indicates that the stream and database can release

   // any references to the recorder.

   //

   // Parameters:

   // close_time - Optional time to record as the closing time of this transaction.

   //

   // If a recorder has not yet been closed (via a call to ), then

   //  will automatically be called, and passed the ~close_time~.  If the recorder

   // has already been closed, then the ~close_time~ will be ignored.

   //

   // This method will trigger a  call.

   function void free(time close_time = 0);

           process p=process::self();

           string s;

       uvm_tr_stream stream;

      if (!is_open() && !is_closed())

        return;

      if (is_open()) begin

         close(close_time);

      end

      do_free();

      // Clear out internal state

      stream = get_stream();

      m_is_closed = 0;

      if(p != null)

        s=p.get_randstate();

      m_stream_dap = new("stream_dap");

      if(p != null)

        p.set_randstate(s);

      m_warn_null_stream = 1;

      if (m_ids_by_recorder.exists(this))

        m_free_id(m_ids_by_recorder[this]);

      // Clear out stream state

      if (stream != null)

        stream.m_free_recorder(this);

   endfunction : free

   // Function: is_open

   // Returns true if this ~uvm_recorder~ was opened on its stream,

   // but has not yet been closed.

   //

   function bit is_open();

      return m_is_opened;

   endfunction : is_open

   // Function: get_open_time

   // Returns the ~open_time~

   //

   function time get_open_time();

      return m_open_time;

   endfunction : get_open_time

   // Function: is_closed

   // Returns true if this ~uvm_recorder~ was closed on its stream,

   // but has not yet been freed.

   //

   function bit is_closed();

      return m_is_closed;

   endfunction : is_closed

   // Function: get_close_time

   // Returns the ~close_time~

   //

   function time get_close_time();

      return m_close_time;

   endfunction : get_close_time

  // Function- m_do_open

  // Initializes the internal state of the recorder.

  //

  // Parameters:

  // stream - The stream which spawned this recorder

  //

  // This method will trigger a  call.

  //

  // An error will be asserted if:

  // - ~m_do_open~ is called more than once without the

  //  recorder being ~freed~ in between.

  // - ~stream~ is ~null~

  function void m_do_open(uvm_tr_stream stream, time open_time, string type_name);

     uvm_tr_stream m_stream;

     if (stream == null) begin

        `uvm_error("UVM/REC/NULL_STREAM",

                   $sformatf("Illegal attempt to set STREAM for '%s' to ''",

                             this.get_name()))

        return;

     end

     if (m_stream_dap.try_get(m_stream)) begin

        `uvm_error("UVM/REC/RE_INIT",

                   $sformatf("Illegal attempt to re-initialize '%s'",

                             this.get_name()))

        return;

     end

     m_stream_dap.set(stream);

     m_open_time = open_time;

     m_is_opened = 1;

     do_open(stream, open_time, type_name);

  endfunction : m_do_open

   // Group: Handles

   // Variable- m_recorders_by_id

   // A corollary to ~m_ids_by_recorder~, this indexes the recorders by their

   // unique ids.

   local static uvm_recorder m_recorders_by_id[integer];

   // Variable- m_id

   // Static int marking the last assigned id.

   local static integer m_id;

   // Function- m_free_id

   // Frees the id/recorder link (memory cleanup)

   //

   static function void m_free_id(integer id);

      uvm_recorder recorder;

      if ((!$isunknown(id)) && (m_recorders_by_id.exists(id)))

        recorder = m_recorders_by_id[id];

      if (recorder != null) begin

         m_recorders_by_id.delete(id);

         m_ids_by_recorder.delete(recorder);

      end

   endfunction : m_free_id

   // Function: get_handle

   // Returns a unique ID for this recorder.

   //

   // A value of ~0~ indicates that the recorder has been ~freed~,

   // and no longer has a valid ID.

   //

   function integer get_handle();

      if (!is_open() && !is_closed()) begin

         return 0;

      end

      else begin

         integer handle = get_inst_id();

         // Check for the weird case where our handle changed.

         if (m_ids_by_recorder.exists(this) && m_ids_by_recorder[this] != handle)

           m_recorders_by_id.delete(m_ids_by_recorder[this]);

         m_recorders_by_id[handle] = this;

         m_ids_by_recorder[this] = handle;

         return handle;

      end

   endfunction : get_handle

   // Function: get_recorder_from_handle

   // Static accessor, returns a recorder reference for a given unique id.

   //

   // If no recorder exists with the given ~id~, or if the

   // recorder with that ~id~ has been freed, then ~null~ is

   // returned.

   //

   // This method can be used to access the recorder associated with a

   // call to  or .

   //

   // | integer handle = tr.begin_tr();

   // | uvm_recorder recorder = uvm_recorder::get_recorder_from_handle(handle);

   // | if (recorder != null) begin

   // |   recorder.record_string("begin_msg", "Started recording transaction!");

   // | end

   //

   static function uvm_recorder get_recorder_from_handle(integer id);

      if (id == 0)

        return null;

      if (($isunknown(id)) || (!m_recorders_by_id.exists(id)))

        return null;

      return m_recorders_by_id[id];

   endfunction : get_recorder_from_handle

   // Group: Attribute Recording

   // Function: record_field

   // Records an integral field (less than or equal to 4096 bits).

   //

   // Parameters:

   // name - Name of the field

   // value - Value of the field to record.

   // size - Number of bits of the field which apply (Usually obtained via $bits).

   // radix - The  to use.

   //

   // This method will trigger a  call.

   function void record_field(string name,

                              uvm_bitstream_t value,

                              int size,

                              uvm_radix_enum radix=UVM_NORADIX);

      if (get_stream() == null) begin

         return;

      end

      do_record_field(name, value, size, radix);

   endfunction : record_field

   // Function: record_field_int

   // Records an integral field (less than or equal to 64 bits).

   //

   // This optimized version of  is useful for sizes up

   // to 64 bits.

   //

   // Parameters:

   // name - Name of the field

   // value - Value of the field to record

   // size - Number of bits of the wfield which apply (Usually obtained via $bits).

   // radix - The  to use.

   //

   // This method will trigger a  call.

   function void record_field_int(string name,

                                  uvm_integral_t value,

                                  int size,

                                  uvm_radix_enum radix=UVM_NORADIX);

        if (get_stream() == null) begin

         return;

      end

      do_record_field_int(name, value, size, radix);

   endfunction : record_field_int

   // Function: record_field_real

   // Records a real field.

   //

   // Parameters:

   // name - Name of the field

   // value - Value of the field to record

   //

   // This method will trigger a  call.

   function void record_field_real(string name,

                                   real value);

      if (get_stream() == null) begin

         return;

      end

      do_record_field_real(name, value);

   endfunction : record_field_real

   // Function: record_object

   // Records an object field.

   //

   // Parameters:

   // name - Name of the field

   // value - Object to record

   //

   // The implementation must use the  and  to

   // determine exactly what should be recorded.

   function void record_object(string name,

                               uvm_object value);

      if (get_stream() == null) begin

         return;

      end

      do_record_object(name, value);

   endfunction : record_object

   // Function: record_string

   // Records a string field.

   //

   // Parameters:

   // name - Name of the field

   // value - Value of the field

   //

   function void record_string(string name,

                               string value);

      if (get_stream() == null) begin

         return;

      end

      do_record_string(name, value);

   endfunction : record_string

   // Function: record_time

   // Records a time field.

   //

   // Parameters:

   // name - Name of the field

   // value - Value of the field

   //

   function void record_time(string name,

                             time value);

      if (get_stream() == null) begin

         return;

      end

      do_record_time(name, value);

   endfunction : record_time

   // Function: record_generic

   // Records a name/value pair, where ~value~ has been converted to a string.

   //

   // For example:

   //| recorder.record_generic("myvar","var_type", $sformatf("%0d",myvar), 32);

   //

   // Parameters:

   // name - Name of the field

   // value - Value of the field

   // type_name - ~optional~ Type name of the field

   function void record_generic(string name,

                                string value,

                                string type_name="");

      if (get_stream() == null) begin

         return;

      end

      do_record_generic(name, value, type_name);

   endfunction : record_generic

  // Function: use_record_attribute

  //

  // Indicates that this recorder does (or does not) support usage of

  // the <`uvm_record_attribute> macro.

  //

  // The default return value is ~0~ (not supported), developers can

  // optionally extend ~uvm_recorder~ and set the value to ~1~ if they

  // support the <`uvm_record_attribute> macro.

  virtual function bit use_record_attribute();

     return 0;

  endfunction : use_record_attribute

   // Function: get_record_attribute_handle

   // Provides a tool-specific handle which is compatible with <`uvm_record_attribute>.

   //

   // By default, this method will return the same value as ,

   // however tool vendors can override this method to provide tool-specific handles

   // which will be passed to the <`uvm_record_attribute> macro.

   //

   virtual function integer get_record_attribute_handle();

      return get_handle();

   endfunction : get_record_attribute_handle

   // Group: Implementation Agnostic API

   // Function: do_open

   // Callback triggered via .

   //

   // The ~do_open~ callback can be used to initialize any internal

   // state within the recorder, as well as providing a location to

   // record any initial information.

   protected virtual function void do_open(uvm_tr_stream stream,

                                             time open_time,

                                             string type_name);

   endfunction : do_open

   // Function: do_close

   // Callback triggered via .

   //

   // The ~do_close~ callback can be used to set internal state

   // within the recorder, as well as providing a location to

   // record any closing information.

   protected virtual function void do_close(time close_time);

   endfunction : do_close

   // Function: do_free

   // Callback triggered via .

   //

   // The ~do_free~ callback can be used to release the internal

   // state within the recorder, as well as providing a location

   // to record any "freeing" information.

   protected virtual function void do_free();

   endfunction : do_free

   // Function: do_record_field

   // Records an integral field (less than or equal to 4096 bits).

   //

   // ~Mandatory~ Backend implementation of 

   pure virtual protected function void do_record_field(string name,

                                                        uvm_bitstream_t value,

                                                        int size,

                                                        uvm_radix_enum radix);

   // Function: do_record_field_int

   // Records an integral field (less than or equal to 64 bits).

   //

   // ~Mandatory~ Backend implementation of 

   pure virtual protected function void do_record_field_int(string name,

                                                            uvm_integral_t value,

                                                            int          size,

                                                            uvm_radix_enum radix);

   // Function: do_record_field_real

   // Records a real field.

   //

   // ~Mandatory~ Backend implementation of 

   pure virtual protected function void do_record_field_real(string name,

                                                             real value);

   // Function: do_record_object

   // Records an object field.

   //

   // ~Mandatory~ Backend implementation of 

   pure virtual protected function void do_record_object(string name,

                                                         uvm_object value);

   // Function: do_record_string

   // Records a string field.

   //

   // ~Mandatory~ Backend implementation of 

   pure virtual protected function void do_record_string(string name,

                                                         string value);

   // Function: do_record_time

   // Records a time field.

   //

   // ~Mandatory~ Backend implementation of 

   pure virtual protected function void do_record_time(string name,

                                                       time value);

   // Function: do_record_generic

   // Records a name/value pair, where ~value~ has been converted to a string.

   //

   // ~Mandatory~ Backend implementation of 

   pure virtual protected function void do_record_generic(string name,

                                                          string value,

                                                          string type_name);

   // The following code is primarily for backwards compat. purposes.  "Transaction

   // Handles" are useful when connecting to a backend, but when passing the information

   // back and forth within simulation, it is safer to user the ~recorder~ itself

   // as a reference to the transaction within the database.

   //------------------------------

   // Group- Vendor-Independent API

   //------------------------------

  // UVM provides only a text-based default implementation.

  // Vendors provide subtype implementations and overwrite the

  //  handle.

  // Function- open_file

  //

  // Opens the file in the  property and assigns to the

  // file descriptor .

  //

  virtual function bit open_file();

     return 0;

  endfunction

  // Function- create_stream

  //

  //

  virtual function integer create_stream (string name,

                                          string t,

                                          string scope);

     return -1;

  endfunction

  // Function- m_set_attribute

  //

  //

  virtual function void m_set_attribute (integer txh,

                                 string nm,

                                 string value);

  endfunction

  // Function- set_attribute

  //

  virtual function void set_attribute (integer txh,

                               string nm,

                               logic [1023:0] value,

                               uvm_radix_enum radix,

                               integer numbits=1024);

  endfunction

  // Function- check_handle_kind

  //

  //

  virtual function integer check_handle_kind (string htype, integer handle);

     return 0;

  endfunction

  // Function- begin_tr

  //

  //

  virtual function integer begin_tr(string txtype,

                                     integer stream,

                                     string nm,

                                     string label="",

                                     string desc="",

                                     time begin_time=0);

    return -1;

  endfunction

  // Function- end_tr

  //

  //

  virtual function void end_tr (integer handle, time end_time=0);

  endfunction

  // Function- link_tr

  //

  //

  virtual function void link_tr(integer h1,

                                 integer h2,

                                 string relation="");

  endfunction

  // Function- free_tr

  //

  //

  virtual function void free_tr(integer handle);

  endfunction

endclass // uvm_recorder

//------------------------------------------------------------------------------

//

// CLASS: uvm_text_recorder

//

// The ~uvm_text_recorder~ is the default recorder implementation for the

// .

//

class uvm_text_recorder extends uvm_recorder;

   `uvm_object_utils(uvm_text_recorder)

   // Variable- m_text_db

   //

   // Reference to the text database backend

   uvm_text_tr_database m_text_db;

   // Variable- scope

   // Imeplementation detail

   uvm_scope_stack scope = new;

   // Function: new

   // Constructor

   //

   // Parameters:

   // name - Instance name

   function new(string name="unnamed-uvm_text_recorder");

      super.new(name);

   endfunction : new

   // Group: Implementation Agnostic API

   // Function: do_open

   // Callback triggered via .

   //

   // Text-backend specific implementation.

   protected virtual function void do_open(uvm_tr_stream stream,

                                             time open_time,

                                             string type_name);

      $cast(m_text_db, stream.get_db());

      if (m_text_db.open_db())

        $fdisplay(m_text_db.m_file,

                  "    OPEN_RECORDER @%0t {TXH:%0d STREAM:%0d NAME:%s TIME:%0t TYPE=\"%0s\"}",

                  $realtime,

                  this.get_handle(),

                  stream.get_handle(),

                  this.get_name(),

                  open_time,

                  type_name);

   endfunction : do_open

   // Function: do_close

   // Callback triggered via .

   //

   // Text-backend specific implementation.

   protected virtual function void do_close(time close_time);

      if (m_text_db.open_db()) begin

         $fdisplay(m_text_db.m_file,

                   "    CLOSE_RECORDER @%0t {TXH:%0d TIME=%0t}",

                   $realtime,

                   this.get_handle(),

                   close_time);

      end

   endfunction : do_close

   // Function: do_free

   // Callback triggered via .

   //

   // Text-backend specific implementation.

   protected virtual function void do_free();

      if (m_text_db.open_db()) begin

         $fdisplay(m_text_db.m_file,

                   "    FREE_RECORDER @%0t {TXH:%0d}",

                   $realtime,

                   this.get_handle());

      end

      m_text_db = null;

   endfunction : do_free

   // Function: do_record_field

   // Records an integral field (less than or equal to 4096 bits).

   //

   // Text-backend specific implementation.

   protected virtual function void do_record_field(string name,

                                                   uvm_bitstream_t value,

                                                   int size,

                                                   uvm_radix_enum radix);

      scope.set_arg(name);

      if (!radix)

        radix = default_radix;

      write_attribute(scope.get(),

                      value,

                      radix,

                      size);

   endfunction : do_record_field

   // Function: do_record_field_int

   // Records an integral field (less than or equal to 64 bits).

   //

   // Text-backend specific implementation.

   protected virtual function void do_record_field_int(string name,

                                                       uvm_integral_t value,

                                                       int          size,

                                                       uvm_radix_enum radix);

      scope.set_arg(name);

      if (!radix)

        radix = default_radix;

      write_attribute_int(scope.get(),

                          value,

                          radix,

                          size);

   endfunction : do_record_field_int

   // Function: do_record_field_real

   // Record a real field.

   //

   // Text-backened specific implementation.

   protected virtual function void do_record_field_real(string name,

                                                        real value);

      bit [63:0] ival = $realtobits(value);

      scope.set_arg(name);

      write_attribute_int(scope.get(),

                          ival,

                          UVM_REAL,

                          64);

   endfunction : do_record_field_real

   // Function: do_record_object

   // Record an object field.

   //

   // Text-backend specific implementation.

   //

   // The method uses ~identifier~ to determine whether or not to

   // record the object instance id, and ~recursion_policy~ to

   // determine whether or not to recurse into the object.

   protected virtual function void do_record_object(string name,

                                                    uvm_object value);

      int            v;

      string         str;

      if(identifier) begin

         if(value != null) begin

            $swrite(str, "%0d", value.get_inst_id());

            v = str.atoi();

         end

         scope.set_arg(name);

         write_attribute_int(scope.get(),

                             v,

                             UVM_DEC,

                             32);

      end

      if(policy != UVM_REFERENCE) begin

         if(value!=null) begin

            if(value.__m_uvm_status_container.cycle_check.exists(value)) return;

            value.__m_uvm_status_container.cycle_check[value] = 1;

            scope.down(name);

            value.record(this);

            scope.up();

            value.__m_uvm_status_container.cycle_check.delete(value);

         end

      end

   endfunction : do_record_object

   // Function: do_record_string

   // Records a string field.

   //

   // Text-backend specific implementation.

   protected virtual function void do_record_string(string name,

                                                    string value);

      scope.set_arg(name);

      if (m_text_db.open_db()) begin

         $fdisplay(m_text_db.m_file,

                   "      SET_ATTR @%0t {TXH:%0d NAME:%s VALUE:%s   RADIX:%s BITS=%0d}",

                   $realtime,

                   this.get_handle(),

                   scope.get(),

                   value,

                   "UVM_STRING",

                   8+value.len());

      end

   endfunction : do_record_string

   // Function: do_record_time

   // Records a time field.

   //

   // Text-backend specific implementation.

   protected virtual function void do_record_time(string name,

                                                    time value);

      scope.set_arg(name);

      write_attribute_int(scope.get(),

                          value,

                          UVM_TIME,

                          64);

   endfunction : do_record_time

   // Function: do_record_generic

   // Records a name/value pair, where ~value~ has been converted to a string.

   //

   // Text-backend specific implementation.

   protected virtual function void do_record_generic(string name,

                                                     string value,

                                                     string type_name);

      scope.set_arg(name);