Subversion Repositories ahb_master

//////////////////////////////////////

//

// General:

//   The AHB is built of an AXI master and an AXI2AHB bridge

// 

//

// I/F :

//   idle - all internal masters emptied their command FIFOs

//   scrbrd_empty - all scoreboard checks have been completed (for random testing)

//

//

// Tasks:

//

// enable()

//   Description: Enables AHB master

//

// write_single(input addr, input wdata)

//   Description: write a single AHB burst (1 data cycle)

//   Parameters:

//           addr  - address

//           wdata - write data

// 

// read_single(input addr, output rdata)

//   Description:

//   Parameters:

//               addr  - address

//               rdata - return read data

//

// check_single(input addr, input expected)

//   Description: read a single AHB burst and gives an error if the data read does not match expected

//   Parameters:

//               addr  - address

//               expected - expected read data

//

// write_and_check_single(input addr, input data)

//   Description: write a single AHB burst read it back and compare the write and read data

//   Parameters:

//               addr  - address

//               data - data to write and expect on read

//

// insert_wr_cmd(input addr, input len, input size)

//   Description: add an AHB write burst to command FIFO

//   Parameters:

//               addr - address

//               len - AHB LEN (data strobe number)

//               size - AHB SIZE (data width)

//  

// insert_rd_cmd(input addr, input len, input size)

//   Description: add an AHB read burst to command FIFO

//   Parameters:

//               addr - address

//               len - AHB LEN (data strobe number)

//               size - AHB SIZE (data width)

//  

// insert_wr_data(input wdata)

//   Description: add a single data to data FIFO (to be used in write bursts)

//   Parameters:

//               wdata - write data

//  

// insert_wr_incr_data(input addr, input len, input size)

//   Description: add an AHB write burst to command FIFO will use incremental data (no need to use insert_wr_data)

//   Parameters:

//               addr - address

//               len - AHB LEN (data strobe number)

//               size - AHB SIZE (data width)

//  

// insert_rand_chk(input burst_num)

//   Description: add multiple commands to command FIFO. Each command writes incremental data to a random address, reads the data back and checks the data. Useful for random testing.

//   Parameters:

//               burst_num - total number of bursts to check

//  

//  

//  Parameters:

//  

//    For random testing: (changing these values automatically update interanl masters)

//      len_min  - minimum burst AHB LEN (length)

//      len_max  - maximum burst AHB LEN (length)

//      size_min - minimum burst AHB SIZE (width)

//      size_max - maximum burst AHB SIZE (width)

//      addr_min - minimum address (in bytes)

//      addr_max - maximum address (in bytes)

//  

//////////////////////////////////////

OUTFILE PREFIX.v

INCLUDE def_ahb_master.txt

module PREFIX(PORTS);

   input                      clk;

   input                      reset;

   revport                    GROUP_AHB;

   output                     idle;

   output                     scrbrd_empty;

   parameter                  LEN_BITS  = 4;

   ##parameter                  SIZE_BITS = 2;

   wire                       GROUP_AXI;

   wire                       GROUP_AHB;

   integer                             GROUP_AXI_MASTER_RAND = GROUP_AXI_MASTER_RAND.DEFAULT;

   always @(*)

     begin

        #FFD;

        axi_master.GROUP_AXI_MASTER_RAND = GROUP_AXI_MASTER_RAND;

     end

   initial

     begin

        #100;

        axi_master.ahb_bursts=1;

     end

CREATE axi_master.v \\

   DEFCMD(SWAP.GLOBAL CONST(ID_BITS) ID_BITS) \\

   DEFCMD(SWAP.GLOBAL CONST(ADDR_BITS) ADDR_BITS) \\

   DEFCMD(SWAP.GLOBAL CONST(DATA_BITS) DATA_BITS) \\

   DEFCMD(SWAP.GLOBAL CONST(ID_NUM) 1)  \\

   DEFCMD(SWAP.GLOBAL CONST(ID0_VAL) ID_BITS'b0)

   axi_master axi_master(

                         .clk(clk),

                         .reset(reset),

                         .GROUP_AXI(GROUP_AXI),

                         .idle(idle),

                         .scrbrd_empty(scrbrd_empty)

                         );

   CREATE axi2ahb.v \\

   DEFCMD(SWAP.GLOBAL CONST(PREFIX) ahbm) \\

   DEFCMD(SWAP.GLOBAL CONST(CMD_DEPTH) 4) \\

   DEFCMD(SWAP.GLOBAL CONST(ADDR_BITS) ADDR_BITS) \\

   DEFCMD(SWAP.GLOBAL CONST(DATA_BITS) DATA_BITS) \\

   DEFCMD(SWAP.GLOBAL CONST(ID_BITS) ID_BITS)

     ahbm_axi2ahb ahbm_axi2ahb(

                         .clk(clk),

                         .reset(reset),

                         .GROUP_AXI(GROUP_AXI),

                         .GROUP_AHB(GROUP_AHB),

                             STOMP ,

                             );

   task enable;

      begin

         axi_master.enable(0);

      end

   endtask

   task write_single;

      input [ADDR_BITS-1:0]  addr;

      input [DATA_BITS-1:0]  wdata;

      begin

         axi_master.write_single(0, addr, wdata);

      end

   endtask

   task read_single;

      input [ADDR_BITS-1:0]  addr;

      output [DATA_BITS-1:0]  rdata;

      begin

         axi_master.read_single(0, addr, rdata);

      end

   endtask

   task check_single;

      input [ADDR_BITS-1:0]  addr;

      input [DATA_BITS-1:0]  expected;

      begin

         axi_master.check_single(0, addr, expected);

      end

   endtask

   task write_and_check_single;

      input [ADDR_BITS-1:0]  addr;

      input [DATA_BITS-1:0]  data;

      begin

         axi_master.write_and_check_single(0, addr, data);

      end

   endtask

   task insert_wr_cmd;

      input [ADDR_BITS-1:0]  addr;

      input [LEN_BITS-1:0]   len;

      input [SIZE_BITS-1:0]  size;

      begin

         axi_master.insert_wr_cmd(0, addr, len, size);

      end

   endtask

   task insert_rd_cmd;

      input [ADDR_BITS-1:0]  addr;

      input [LEN_BITS-1:0]   len;

      input [SIZE_BITS-1:0]  size;

      begin

         axi_master.insert_rd_cmd(0, addr, len, size);

      end

   endtask

   task insert_wr_data;

      input [DATA_BITS-1:0]  wdata;

      begin

         axi_master.insert_wr_data(0, wdata);

      end

   endtask

   task insert_wr_incr_data;

      input [ADDR_BITS-1:0]  addr;

      input [LEN_BITS-1:0]   len;

      input [SIZE_BITS-1:0]  size;

      begin

         axi_master.insert_wr_incr_data(0, addr, len, size);

      end

   endtask

   task insert_rand_chk;

      input [31:0] burst_num;

      begin

         axi_master.insert_rand_chk(0, burst_num);

      end

   endtask

endmodule