/*****************************************************************************

  The following code is derived, directly or indirectly, from the SystemC
  source code Copyright (c) 1996-2004 by all Contributors.
  All Rights reserved.

  The contents of this file are subject to the restrictions and limitations
  set forth in the SystemC Open Source License Version 2.4 (the "License");
  You may not use this file except in compliance with such restrictions and
  limitations. You may obtain instructions on how to receive a copy of the
  License at http://www.systemc.org/. Software distributed by Contributors
  under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
  ANY KIND, either express or implied. See the License for the specific
  language governing rights and limitations under the License.

 *****************************************************************************/

/*****************************************************************************
 
  paging.h -- Instruction Paging Unit.
 
  Original Author: Martin Wang, Synopsys, Inc.
 
 *****************************************************************************/
 
/*****************************************************************************
 
  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
  changes you are making here.
 
      Name, Affiliation, Date:
  Description of Modification:
 
 *****************************************************************************/


struct paging : sc_module {
        sc_in<unsigned >   paging_din; 	// input data       
        sc_in<bool>           paging_csin;    	// chip select        
        sc_in<bool>           paging_wein;    	// write enable       
        sc_in<unsigned >   logical_address; 	// logical address  
        sc_in<unsigned >   icache_din;      	// data from BIOS/icache
        sc_in<bool>           icache_validin;   // data valid bit 
        sc_in<bool>           icache_stall;     // stall IFU if busy

        sc_out<unsigned >  paging_dout;            // output data
        sc_out<bool>  	      paging_csout;           // output cs to cache/BIOS
        sc_out<bool>  	      paging_weout;           // write enable to cache/BIOS
        sc_out<unsigned >  physical_address;       // physical address 
        sc_out<unsigned >  dataout;        	      // dataout from memory
        sc_out<bool>  	      data_valid;             // data valid
        sc_out<bool>  	      stall_ifu;              // stall IFU if busy
	sc_in_clk 	      CLK;

        signed int pid_reg;             //CPU process ID register      

  SC_CTOR(paging) {
      SC_CTHREAD(entry, CLK.pos());
      pid_reg = 0;
  }
  
  void entry();
};

// EOF
