uvm中寄存器模型中set_check_on_read和get_check_on_read的用法

set_check_on_read

   // 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
   //当参数为真，这个寄存器模型将自动检查从寄存器或寄存器域读回的值与mirror的值；
   // and report any discrepancy.
   // This effectively combines the functionality of the
   // <uvm_reg::read()> 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 reguardless 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

get_check_on_read

   // 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

uvm_reg_map

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];

   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
  ......