///////////////////////////////////////////
// wally-pipelinedsoc.sv
//
// Written: David_Harris@hmc.edu 6 November 2020
// Modified: 
//
// Purpose: System on chip including pipelined processor and memories
// Full RV32/64IC instruction set
//
// Note: the CSRs do not support the following features
//- Disabling portions of the instruction set with bits of the MISA register
//- Changing from RV64 to RV32 by writing the SXL/UXL bits of the STATUS register
// As of January 2020, virtual memory is not yet supported
//
// A component of the Wally configurable RISC-V project.
// 
// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
//
// MIT LICENSE
// Permission is hereby granted, free of charge, to any person obtaining a copy of this 
// software and associated documentation files (the "Software"), to deal in the Software 
// without restriction, including without limitation the rights to use, copy, modify, merge, 
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons 
// to whom the Software is furnished to do so, subject to the following conditions:
//
//   The above copyright notice and this permission notice shall be included in all copies or 
//   substantial portions of the Software.
//
//   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
//   INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 
//   PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 
//   BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
//   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE 
//   OR OTHER DEALINGS IN THE SOFTWARE.
////////////////////////////////////////////////////////////////////////////////////////////////

`include "wally-config.vh"

module wallypipelinedsoc (
  input  logic 		   clk, reset_ext, 
  output logic       reset,
  // AHB Lite Interface
  // inputs from external memory
  input  logic [`AHBW-1:0]  HRDATAEXT,
  input  logic 		   HREADYEXT, HRESPEXT,
  output logic 		   HSELEXT,
  // outputs to external memory, shared with uncore memory
  output logic 		   HCLK, HRESETn,
  output logic [31:0] 	   HADDR,
  output logic [`AHBW-1:0] HWDATA,
  output logic [`XLEN/8-1:0] HWSTRB,
  output logic 		   HWRITE,
  output logic [2:0] 	   HSIZE,
  output logic [2:0] 	   HBURST,
  output logic [3:0] 	   HPROT,
  output logic [1:0] 	   HTRANS,
  output logic 		   HMASTLOCK,
  output logic 		   HREADY,
  // I/O Interface
  input  logic       TIMECLK,
  input logic [31:0] 	   GPIOPinsIn,
  output logic [31:0] 	   GPIOPinsOut, GPIOPinsEn,
  input logic 		   UARTSin,
  output logic 		   UARTSout,
  input logic 		   SDCCmdIn,
  output logic 		   SDCCmdOut,
  output logic 		   SDCCmdOE,			  
  input logic [3:0] 	   SDCDatIn,
  output logic 		   SDCCLK			  
);

  // Uncore signals
//  logic 		   reset;
  logic [`AHBW-1:0] HRDATA;   // from AHB mux in uncore
  logic             HRESP;
  logic             MTimerInt, MSwInt; // from CLINT
  logic [63:0]      MTIME_CLINT; // from CLINT to CSRs
  logic             MExtInt,SExtInt; // from PLIC
  logic [2:0]       HADDRD;
  logic [3:0]       HSIZED;
  logic             HWRITED;


  // synchronize reset to SOC clock domain
  synchronizer resetsync(.clk, .d(reset_ext), .q(reset)); 
   
  // instantiate processor and memories
  wallypipelinedcore core(.clk, .reset,
    .MTimerInt, .MExtInt, .SExtInt, .MSwInt, 
    .MTIME_CLINT,
    .HRDATA, .HREADY, .HRESP, .HCLK, .HRESETn, .HADDR, .HWDATA, .HWSTRB,
    .HWRITE, .HSIZE, .HBURST, .HPROT, .HTRANS, .HMASTLOCK,
    .HADDRD, .HSIZED, .HWRITED
   );

  if (`DBUS | `IBUS) begin : uncore
    uncore uncore(.HCLK, .HRESETn, .TIMECLK,
      .HADDR, .HWDATA, .HWSTRB, .HWRITE, .HSIZE, .HBURST, .HPROT, .HTRANS, .HMASTLOCK, .HRDATAEXT,
      .HREADYEXT, .HRESPEXT, .HRDATA, .HREADY, .HRESP, .HADDRD, .HWRITED, .HSELEXT,
      .MTimerInt, .MSwInt, .MExtInt, .SExtInt, .GPIOPinsIn, .GPIOPinsOut, .GPIOPinsEn, .UARTSin, 
	  .UARTSout, .MTIME_CLINT, 
	  .SDCCmdOut, .SDCCmdOE, .SDCCmdIn, .SDCDatIn, .SDCCLK
    );
  end

endmodule