Subversion Repositories uart2bus_testbench

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

//    Copyright 2004-2011 Synopsys, Inc.

//    Copyright 2010-2011 Mentor Graphics Corporation

//    Copyright 2010-2011 Cadence Design Systems, Inc.

//    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.

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

//

class uvm_reg_map_info;

   uvm_reg_addr_t         offset;

   string                 rights;

   bit                    unmapped;

   uvm_reg_addr_t         addr[];

   uvm_reg_frontdoor      frontdoor;

   uvm_reg_map_addr_range mem_range;

   // if set marks the uvm_reg_map_info as initialized, prevents using an uninitialized map (for instance if the model

   // has not been locked accidently and the maps have not been computed before)

   bit                    is_initialized;

endclass

// Class: uvm_reg_transaction_order_policy

virtual class uvm_reg_transaction_order_policy extends uvm_object;

    function new(string name = "policy");

        super.new(name);

    endfunction

    // Function: order

    // the order() function may reorder the sequence of bus transactions

    // produced by a single uvm_reg transaction (read/write).

    // This can be used in scenarios when the register width differs from

    // the bus width and one register access results in a series of bus transactions.

    // the first item (0) of the queue will be the first bus transaction (the last($)

    // will be the final transaction

    pure virtual function void order(ref uvm_reg_bus_op q[$]);

endclass

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

//

// Class: uvm_reg_map

//

// :Address map abstraction class

//

// This class represents an address map.

// An address map is a collection of registers and memories

// accessible via a specific physical interface.

// Address maps can be composed into higher-level address maps.

//

// Address maps are created using the 

// method.

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

class uvm_reg_map extends uvm_object;

   `uvm_object_utils(uvm_reg_map)

   // info that is valid only if top-level map

   local uvm_reg_addr_t     m_base_addr;

   local int unsigned       m_n_bytes;

   local uvm_endianness_e   m_endian;

   local bit                m_byte_addressing;

   local uvm_object_wrapper m_sequence_wrapper;

   local uvm_reg_adapter    m_adapter;

   local uvm_sequencer_base m_sequencer;

   local bit                m_auto_predict;

   local bit                m_check_on_read;

   local uvm_reg_block      m_parent;

   local int unsigned       m_system_n_bytes;

   local uvm_reg_map        m_parent_map;

   local uvm_reg_addr_t     m_parent_maps[uvm_reg_map];   // value=offset of this map at parent level

   local uvm_reg_addr_t     m_submaps[uvm_reg_map];       // value=offset of submap at this level

   local string             m_submap_rights[uvm_reg_map]; // value=rights of submap at this level

   local uvm_reg_map_info   m_regs_info[uvm_reg];

   local uvm_reg_map_info   m_mems_info[uvm_mem];

   local uvm_reg            m_regs_by_offset[uvm_reg_addr_t];

                            // Use only in addition to above if a RO and a WO

                            // register share the same address.

   local uvm_reg            m_regs_by_offset_wo[uvm_reg_addr_t];

   local uvm_mem            m_mems_by_offset[uvm_reg_map_addr_range];

   local uvm_reg_transaction_order_policy policy;

   extern /*local*/ function void Xinit_address_mapX();

   static local uvm_reg_map   m_backdoor;

   // Function: backdoor

   // Return the backdoor pseudo-map singleton

   //

   // This pseudo-map is used to specify or configure the backdoor

   // instead of a real address map.

   //

   static function uvm_reg_map backdoor();

      if (m_backdoor == null)

        m_backdoor = new("Backdoor");

      return m_backdoor;

   endfunction

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

   // Group: Initialization

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

   // Function: new

   //

   // Create a new instance

   //

   extern function new(string name="uvm_reg_map");

   // Function: configure

   //

   // Instance-specific configuration

   //

   // Configures this map with the following properties.

   //

   // parent    - the block in which this map is created and applied

   //

   // base_addr - the base address for this map. All registers, memories,

   //             and sub-blocks will be at offsets to this address

   //

   // n_bytes   - the byte-width of the bus on which this map is used

   //

   // endian    - the endian format. See  for possible

   //             values

   //

   // byte_addressing - specifies whether the address increment is on a

   //             per-byte basis. For example, consecutive memory locations

   //             with ~n_bytes~=4 (32-bit bus) are 4 apart: 0, 4, 8, and

   //             so on. Default is TRUE.

   //

   extern function void configure(uvm_reg_block     parent,

                                  uvm_reg_addr_t    base_addr,

                                  int unsigned      n_bytes,

                                  uvm_endianness_e  endian,

                                  bit byte_addressing = 1);

   // Function: add_reg

   //

   // Add a register

   //

   // Add the specified register instance ~rg~ to this address map.

   //

   // The register is located at the specified address ~offset~ from

   // this maps configured base address.

   //

   // The ~rights~ specify the register's accessibility via this map.

   // Valid values are "RW", "RO", and "WO". Whether a register field

   // can be read or written depends on both the field's configured access

   // policy (see  and the register's rights in

   // the map being used to access the field.

   //

   // The number of consecutive physical addresses occupied by the register

   // depends on the width of the register and the number of bytes in the

   // physical interface corresponding to this address map.

   //

   // If ~unmapped~ is TRUE, the register does not occupy any

   // physical addresses and the base address is ignored.

   // Unmapped registers require a user-defined ~frontdoor~ to be specified.

   //

   // A register may be added to multiple address maps

   // if it is accessible from multiple physical interfaces.

   // A register may only be added to an address map whose parent block

   // is the same as the register's parent block.

   //

   extern virtual function void add_reg (uvm_reg           rg,

                                         uvm_reg_addr_t    offset,

                                         string            rights = "RW",

                                         bit               unmapped=0,

                                         uvm_reg_frontdoor frontdoor=null);

   // Function: add_mem

   //

   // Add a memory

   //

   // Add the specified memory instance to this address map.

   // The memory is located at the specified base address and has the

   // specified access rights ("RW", "RO" or "WO").

   // The number of consecutive physical addresses occupied by the memory

   // depends on the width and size of the memory and the number of bytes in the

   // physical interface corresponding to this address map.

   //

   // If ~unmapped~ is TRUE, the memory does not occupy any

   // physical addresses and the base address is ignored.

   // Unmapped memories require a user-defined ~frontdoor~ to be specified.

   //

   // A memory may be added to multiple address maps

   // if it is accessible from multiple physical interfaces.

   // A memory may only be added to an address map whose parent block

   // is the same as the memory's parent block.

   //

   extern virtual function void add_mem (uvm_mem        mem,

                                         uvm_reg_addr_t offset,

                                         string         rights = "RW",

                                         bit            unmapped=0,

                                         uvm_reg_frontdoor frontdoor=null);

   // Function: add_submap

   //

   // Add an address map

   //

   // Add the specified address map instance to this address map.

   // The address map is located at the specified base address.

   // The number of consecutive physical addresses occupied by the submap

   // depends on the number of bytes in the physical interface

   // that corresponds to the submap,

   // the number of addresses used in the submap and

   // the number of bytes in the

   // physical interface corresponding to this address map.

   //

   // An address map may be added to multiple address maps

   // if it is accessible from multiple physical interfaces.

   // An address map may only be added to an address map

   // in the grand-parent block of the address submap.

   //

   extern virtual function void add_submap (uvm_reg_map    child_map,

                                            uvm_reg_addr_t offset);

   // Function: set_sequencer

   //

   // Set the sequencer and adapter associated with this map. This method

   // ~must~ be called before starting any sequences based on uvm_reg_sequence.

   extern virtual function void set_sequencer (uvm_sequencer_base sequencer,

                                               uvm_reg_adapter    adapter=null);

   // Function: set_submap_offset

   //

   // Set the offset of the given ~submap~ to ~offset~.

   extern virtual function void set_submap_offset (uvm_reg_map submap,

                                                   uvm_reg_addr_t offset);

   // Function: get_submap_offset

   //

   // Return the offset of the given ~submap~.

   extern virtual function uvm_reg_addr_t get_submap_offset (uvm_reg_map submap);

   // Function: set_base_addr

   //

   // Set the base address of this map.

   extern virtual function void   set_base_addr (uvm_reg_addr_t  offset);

   // Function: reset

   //

   // Reset the mirror for all registers in this address map.

   //

   // Sets the mirror value of all registers in this address map

   // and all of its submaps

   // to the reset value corresponding to the specified reset event.

   // See  for more details.

   // Does not actually set the value of the registers in the design,

   // only the values mirrored in their corresponding mirror.

   //

   // Note that, unlike the other reset() method, the default

   // reset event for this method is "SOFT".

   //

   extern virtual function void reset(string kind = "SOFT");

   /*local*/ extern virtual function void add_parent_map(uvm_reg_map  parent_map,

                                                         uvm_reg_addr_t offset);

   /*local*/ extern virtual function void Xverify_map_configX();

   /*local*/ extern virtual function void m_set_reg_offset(uvm_reg   rg,

                                                           uvm_reg_addr_t offset,

                                                           bit unmapped);

   /*local*/ extern virtual function void m_set_mem_offset(uvm_mem mem,

                                                           uvm_reg_addr_t offset,

                                                           bit unmapped);

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

   // Group: Introspection

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

   // Function: get_name

   //

   // Get the simple name

   //

   // Return the simple object name of this address map.

   //

   // Function: get_full_name

   //

   // Get the hierarchical name

   //

   // Return the hierarchal name of this address map.

   // The base of the hierarchical name is the root block.

   //

   extern virtual function string get_full_name();

   // Function: get_root_map

   //

   // Get the externally-visible address map

   //

   // Get the top-most address map where this address map is instantiated.

   // It corresponds to the externally-visible address map that can

   // be accessed by the verification environment.

   //

   extern virtual function uvm_reg_map get_root_map();

   // Function: get_parent

   //

   // Get the parent block

   //

   // Return the block that is the parent of this address map.

   //

   extern virtual function uvm_reg_block get_parent();

   // Function: get_parent_map

   // Get the higher-level address map

   //

   // Return the address map in which this address map is mapped.

   // returns ~null~ if this is a top-level address map.

   //

   extern virtual function uvm_reg_map           get_parent_map();

   // Function: get_base_addr

   //

   // Get the base offset address for this map. If this map is the

   // root map, the base address is that set with the ~base_addr~ argument

   // to . If this map is a submap of a higher-level map,

   // the base address is offset given this submap by the parent map.

   // See .

   //

   extern virtual function uvm_reg_addr_t get_base_addr (uvm_hier_e hier=UVM_HIER);

   // Function: get_n_bytes

   //

   // Get the width in bytes of the bus associated with this map. If ~hier~

   // is ~UVM_HIER~, then gets the effective bus width relative to the system

   // level. The effective bus width is the narrowest bus width from this

   // map to the top-level root map. Each bus access will be limited to this

   // bus width.

   //

   extern virtual function int unsigned get_n_bytes (uvm_hier_e hier=UVM_HIER);

   // Function: get_addr_unit_bytes

   //

   // Get the number of bytes in the smallest addressable unit in the map.

   // Returns 1 if the address map was configured using byte-level addressing.

   // Returns  otherwise.

   //

   extern virtual function int unsigned get_addr_unit_bytes();

   // Function: get_base_addr

   //

   // Gets the endianness of the bus associated with this map. If ~hier~ is

   // set to ~UVM_HIER~, gets the system-level endianness.

   //

   extern virtual function uvm_endianness_e get_endian (uvm_hier_e hier=UVM_HIER);

   // Function: get_sequencer

   //

   // Gets the sequencer for the bus associated with this map. If ~hier~ is

   // set to ~UVM_HIER~, gets the sequencer for the bus at the system-level.

   // See .

   //

   extern virtual function uvm_sequencer_base get_sequencer (uvm_hier_e hier=UVM_HIER);

   // Function: get_adapter

   //

   // Gets the bus adapter for the bus associated with this map. If ~hier~ is

   // set to ~UVM_HIER~, gets the adapter for the bus used at the system-level.

   // See .

   //

   extern virtual function uvm_reg_adapter get_adapter (uvm_hier_e hier=UVM_HIER);

   // Function: get_submaps

   //

   // Get the address sub-maps

   //

   // Get the address maps instantiated in this address map.

   // If ~hier~ is ~UVM_HIER~, recursively includes the address maps,

   // in the sub-maps.

   //

   extern virtual function void  get_submaps (ref uvm_reg_map maps[$],

                                              input uvm_hier_e hier=UVM_HIER);

   // Function: get_registers

   //

   // Get the registers

   //

   // Get the registers instantiated in this address map.

   // If ~hier~ is ~UVM_HIER~, recursively includes the registers

   // in the sub-maps.

   //

   extern virtual function void  get_registers (ref uvm_reg regs[$],

                                                input uvm_hier_e hier=UVM_HIER);

   // Function: get_fields

   //

   // Get the fields

   //

   // Get the fields in the registers instantiated in this address map.

   // If ~hier~ is ~UVM_HIER~, recursively includes the fields of the registers

   // in the sub-maps.

   //

   extern virtual function void  get_fields (ref uvm_reg_field fields[$],

                                             input uvm_hier_e hier=UVM_HIER);

   // Function: get_memories

   //

   // Get the memories

   //

   // Get the memories instantiated in this address map.

   // If ~hier~ is ~UVM_HIER~, recursively includes the memories

   // in the sub-maps.

   //

   extern virtual function void  get_memories (ref uvm_mem mems[$],

                                               input uvm_hier_e hier=UVM_HIER);

   // Function: get_virtual_registers

   //

   // Get the virtual registers

   //

   // Get the virtual registers instantiated in this address map.

   // If ~hier~ is ~UVM_HIER~, recursively includes the virtual registers

   // in the sub-maps.

   //

   extern virtual function void  get_virtual_registers (ref uvm_vreg regs[$],

                                                        input uvm_hier_e hier=UVM_HIER);

   // Function: get_virtual_fields

   //

   // Get the virtual fields

   //

   // Get the virtual fields from the virtual registers instantiated

   // in this address map.

   // If ~hier~ is ~UVM_HIER~, recursively includes the virtual fields

   // in the virtual registers in the sub-maps.

   //

   extern virtual function void  get_virtual_fields (ref uvm_vreg_field fields[$],

                                                     input uvm_hier_e hier=UVM_HIER);

   extern virtual function uvm_reg_map_info get_reg_map_info(uvm_reg rg,  bit error=1);

   extern virtual function uvm_reg_map_info get_mem_map_info(uvm_mem mem, bit error=1);

   extern virtual function int unsigned get_size();

   // Function: get_physical_addresses

   //

   // Translate a local address into external addresses

   //

   // Identify the sequence of addresses that must be accessed physically

   // to access the specified number of bytes at the specified address

   // within this address map.

   // Returns the number of bytes of valid data in each access.

   //

   // Returns in ~addr~ a list of address in little endian order,

   // with the granularity of the top-level address map.

   //

   // A register is specified using a base address with ~mem_offset~ as 0.

   // A location within a memory is specified using the base address

   // of the memory and the index of the location within that memory.

   //

   extern virtual function int get_physical_addresses(uvm_reg_addr_t        base_addr,

                                                      uvm_reg_addr_t        mem_offset,

                                                      int unsigned          n_bytes,

                                                      ref uvm_reg_addr_t    addr[]);

   // Function: get_reg_by_offset

   //

   // Get register mapped at offset

   //

   // Identify the register located at the specified offset within

   // this address map for the specified type of access.

   // Returns ~null~ if no such register is found.

   //

   // The model must be locked using 

   // to enable this functionality.

   //

   extern virtual function uvm_reg get_reg_by_offset(uvm_reg_addr_t offset,

                                                     bit            read = 1);

   //

   // Function: get_mem_by_offset

   // Get memory mapped at offset

   //

   // Identify the memory located at the specified offset within

   // this address map. The offset may refer to any memory location

   // in that memory.

   // Returns ~null~ if no such memory is found.

   //

   // The model must be locked using 

   // to enable this functionality.

   //

   extern virtual function uvm_mem    get_mem_by_offset(uvm_reg_addr_t offset);

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

   // Group: Bus Access

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

   // Function: set_auto_predict

   //

   // Sets the auto-predict mode for his map.

   //

   // When ~on~ is ~TRUE~,

   // the register model will automatically update its mirror

   // (what it thinks should be in the DUT) immediately after

   // any bus read or write operation via this map. Before a 

   // or  operation returns, the register's 

   // method is called to update the mirrored value in the register.

   //

   // When ~on~ is ~FALSE~, bus reads and writes via this map do not

   // automatically update the mirror. For real-time updates to the mirror

   // in this mode, you connect a  instance to the bus

   // monitor. The predictor takes observed bus transactions from the

   // bus monitor, looks up the associated  register given

   // the address, then calls that register's  method.

   // While more complex, this mode will capture all register read/write

   // activity, including that not directly descendant from calls to

   //  and .

   //

   // By default, auto-prediction is turned off.

   //

   function void set_auto_predict(bit on=1); m_auto_predict = on; endfunction

   // Function: get_auto_predict

   //

   // Gets the auto-predict mode setting for this map.

   //

   function bit  get_auto_predict(); return m_auto_predict; endfunction

   // Function: set_check_on_read

   //

   // Sets the check-on-read mode for his map

   // and all of its submaps.

   //

   // When ~on~ is ~TRUE~,

   // the register model will automatically check any value read back from

   // a register or field against the current value in its mirror

   // and report any discrepancy.

   // This effectively combines the functionality of the

   //  and ~uvm_reg::mirror(UVM_CHECK)~ method.

   // This mode is useful when the register model is used passively.

   //

   // When ~on~ is ~FALSE~, no check is made against the mirrored value.

   //

   // At the end of the read operation, the mirror value is updated based

   // on the value that was read regardless of this mode setting.

   //

   // By default, auto-prediction is turned off.

   //

   function void set_check_on_read(bit on=1);

      m_check_on_read = on;

      foreach (m_submaps[submap]) begin

         submap.set_check_on_read(on);

      end

   endfunction

   // Function: get_check_on_read

   //

   // Gets the check-on-read mode setting for this map.

   //

   function bit  get_check_on_read(); return m_check_on_read; endfunction

   // Task: do_bus_write

   //

   // Perform a bus write operation.

   //

   extern virtual task do_bus_write (uvm_reg_item rw,

                                     uvm_sequencer_base sequencer,

                                     uvm_reg_adapter adapter);

   // Task: do_bus_read

   //

   // Perform a bus read operation.

   //

   extern virtual task do_bus_read (uvm_reg_item rw,

                                    uvm_sequencer_base sequencer,

                                    uvm_reg_adapter adapter);

   // Task: do_write

   //

   // Perform a write operation.

   //

   extern virtual task do_write(uvm_reg_item rw);

   // Task: do_read

   //

   // Perform a read operation.

   //

   extern virtual task do_read(uvm_reg_item rw);

   extern function void Xget_bus_infoX (uvm_reg_item rw,

                                        output uvm_reg_map_info map_info,

                                        output int size,

                                        output int lsb,

                                        output int addr_skip);

   extern virtual function string      convert2string();

   extern virtual function uvm_object  clone();

   extern virtual function void        do_print (uvm_printer printer);

   extern virtual function void        do_copy   (uvm_object rhs);

   //extern virtual function bit       do_compare (uvm_object rhs, uvm_comparer comparer);

   //extern virtual function void      do_pack (uvm_packer packer);

   //extern virtual function void      do_unpack (uvm_packer packer);

    // Function: set_transaction_order_policy

    // set the transaction order policy

    function void set_transaction_order_policy(uvm_reg_transaction_order_policy pol);

        policy = pol;

    endfunction

    // Function: get_transaction_order_policy

    // set the transaction order policy

    function uvm_reg_transaction_order_policy get_transaction_order_policy();

        return policy;

    endfunction

endclass: uvm_reg_map

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

// Initialization

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

// new

function uvm_reg_map::new(string name = "uvm_reg_map");

   super.new((name == "") ? "default_map" : name);

   m_auto_predict = 0;

   m_check_on_read = 0;

endfunction

// configure

function void uvm_reg_map::configure(uvm_reg_block    parent,

                                     uvm_reg_addr_t   base_addr,

                                     int unsigned     n_bytes,

                                     uvm_endianness_e endian,

                                     bit              byte_addressing=1);

   m_parent     = parent;

   m_n_bytes    = n_bytes;

   m_endian     = endian;

   m_base_addr  = base_addr;

   m_byte_addressing = byte_addressing;

endfunction: configure

// add_reg

function void uvm_reg_map::add_reg(uvm_reg rg,

                                   uvm_reg_addr_t offset,

                                   string rights = "RW",

                                   bit unmapped=0,

                                   uvm_reg_frontdoor frontdoor=null);

   if (m_regs_info.exists(rg)) begin

      `uvm_error("RegModel", {"Register '",rg.get_name(),

                 "' has already been added to map '",get_name(),"'"})

      return;

   end

   if (rg.get_parent() != get_parent()) begin

      `uvm_error("RegModel",

         {"Register '",rg.get_full_name(),"' may not be added to address map '",

          get_full_name(),"' : they are not in the same block"})

      return;

   end

   rg.add_map(this);

   begin

   uvm_reg_map_info info = new;

   info.offset   = offset;

   info.rights   = rights;

   info.unmapped = unmapped;

   info.frontdoor = frontdoor;

   m_regs_info[rg] = info;

   end

endfunction

// m_set_reg_offset

function void uvm_reg_map::m_set_reg_offset(uvm_reg rg,

                                            uvm_reg_addr_t offset,

                                            bit unmapped);

   if (!m_regs_info.exists(rg)) begin

      `uvm_error("RegModel",

         {"Cannot modify offset of register '",rg.get_full_name(),

         "' in address map '",get_full_name(),

         "' : register not mapped in that address map"})

      return;

   end

   begin

      uvm_reg_map_info info    = m_regs_info[rg];

      uvm_reg_block    blk     = get_parent();

      uvm_reg_map      top_map = get_root_map();

      uvm_reg_addr_t   addrs[];

      // if block is not locked, Xinit_address_mapX will resolve map when block is locked

      if (blk.is_locked()) begin

         // remove any existing cached addresses

         if (!info.unmapped) begin

           foreach (info.addr[i]) begin

              if (!top_map.m_regs_by_offset_wo.exists(info.addr[i])) begin

                 top_map.m_regs_by_offset.delete(info.addr[i]);

              end

              else begin

                 if (top_map.m_regs_by_offset[info.addr[i]] == rg) begin

                    top_map.m_regs_by_offset[info.addr[i]] =

                      top_map.m_regs_by_offset_wo[info.addr[i]];

                    uvm_reg_read_only_cbs::remove(rg);

                    uvm_reg_write_only_cbs::remove(top_map.m_regs_by_offset[info.addr[i]]);

                 end

                 else begin

                    uvm_reg_write_only_cbs::remove(rg);

                    uvm_reg_read_only_cbs::remove(top_map.m_regs_by_offset[info.addr[i]]);

                 end

                 top_map.m_regs_by_offset_wo.delete(info.addr[i]);

              end

           end

         end

         // if we are remapping...

         if (!unmapped) begin

            string rg_acc = rg.Xget_fields_accessX(this);

            // get new addresses

            void'(get_physical_addresses(offset,0,rg.get_n_bytes(),addrs));

            // make sure they do not conflict with others

            foreach (addrs[i]) begin

               uvm_reg_addr_t addr = addrs[i];

               if (top_map.m_regs_by_offset.exists(addr)) begin

                  uvm_reg rg2 = top_map.m_regs_by_offset[addr];

                  string rg2_acc = rg2.Xget_fields_accessX(this);

                  // If the register at the same address is RO or WO

                  // and this register is WO or RO, this is OK

                  if (rg_acc == "RO" && rg2_acc == "WO") begin

                     top_map.m_regs_by_offset[addr]    = rg;

                     uvm_reg_read_only_cbs::add(rg);

                     top_map.m_regs_by_offset_wo[addr] = rg2;

                     uvm_reg_write_only_cbs::add(rg2);

                  end

                  else if (rg_acc == "WO" && rg2_acc == "RO") begin

                     top_map.m_regs_by_offset_wo[addr] = rg;

                     uvm_reg_write_only_cbs::add(rg);

                     uvm_reg_read_only_cbs::add(rg2);

                  end

                  else begin

                     string a;

                     a = $sformatf("%0h",addr);

                     `uvm_warning("RegModel", {"In map '",get_full_name(),"' register '",

                                               rg.get_full_name(), "' maps to same address as register '",

                                               top_map.m_regs_by_offset[addr].get_full_name(),"': 'h",a})

                  end

               end

               else

                  top_map.m_regs_by_offset[addr] = rg;

               foreach (top_map.m_mems_by_offset[range]) begin

                  if (addrs[i] >= range.min && addrs[i] <= range.max) begin

                    string a;

                    a = $sformatf("%0h",addrs[i]);

                    `uvm_warning("RegModel", {"In map '",get_full_name(),"' register '",

                        rg.get_full_name(), "' overlaps with address range of memory '",

                        top_map.m_mems_by_offset[range].get_full_name(),"': 'h",a})

                  end

               end

            end

            info.addr = addrs; // cache it

         end

      end

      if (unmapped) begin

        info.offset   = -1;

        info.unmapped = 1;

      end

      else begin

        info.offset   = offset;

        info.unmapped = 0;

      end

   end

endfunction

// add_mem

function void uvm_reg_map::add_mem(uvm_mem mem,

                                   uvm_reg_addr_t offset,

                                   string rights = "RW",

                                   bit unmapped=0,

                                   uvm_reg_frontdoor frontdoor=null);

   if (m_mems_info.exists(mem)) begin

      `uvm_error("RegModel", {"Memory '",mem.get_name(),

                 "' has already been added to map '",get_name(),"'"})

      return;

   end

   if (mem.get_parent() != get_parent()) begin

      `uvm_error("RegModel",

         {"Memory '",mem.get_full_name(),"' may not be added to address map '",

          get_full_name(),"' : they are not in the same block"})

      return;

   end

   mem.add_map(this);

   begin

   uvm_reg_map_info info = new;

   info.offset   = offset;

   info.rights   = rights;

   info.unmapped = unmapped;

   info.frontdoor = frontdoor;

   m_mems_info[mem] = info;

   end

endfunction: add_mem

// m_set_mem_offset

function void uvm_reg_map::m_set_mem_offset(uvm_mem mem,

                                            uvm_reg_addr_t offset,

                                            bit unmapped);

   if (!m_mems_info.exists(mem)) begin

      `uvm_error("RegModel",

         {"Cannot modify offset of memory '",mem.get_full_name(),

         "' in address map '",get_full_name(),

         "' : memory not mapped in that address map"})

      return;

   end

   begin

      uvm_reg_map_info info    = m_mems_info[mem];

      uvm_reg_block    blk     = get_parent();

      uvm_reg_map      top_map = get_root_map();

      uvm_reg_addr_t   addrs[];

      // if block is not locked, Xinit_address_mapX will resolve map when block is locked

      if (blk.is_locked()) begin

         // remove any existing cached addresses

         if (!info.unmapped) begin

           foreach (top_map.m_mems_by_offset[range]) begin

              if (top_map.m_mems_by_offset[range] == mem)

                 top_map.m_mems_by_offset.delete(range);

           end

         end

         // if we are remapping...

         if (!unmapped) begin

            uvm_reg_addr_t addrs[],addrs_max[];

            uvm_reg_addr_t min, max, min2, max2;

            int unsigned stride;

            void'(get_physical_addresses(offset,0,mem.get_n_bytes(),addrs));

            min = (addrs[0] < addrs[addrs.size()-1]) ? addrs[0] : addrs[addrs.size()-1];

            min2 = addrs[0];

            void'(get_physical_addresses(offset,(mem.get_size()-1),

                                         mem.get_n_bytes(),addrs_max));

            max = (addrs_max[0] > addrs_max[addrs_max.size()-1]) ?

               addrs_max[0] : addrs_max[addrs_max.size()-1];

            max2 = addrs_max[0];

            // address interval between consecutive mem locations

            stride = (max2 - max)/(mem.get_size()-1);

            // make sure new offset does not conflict with others

            foreach (top_map.m_regs_by_offset[reg_addr]) begin