Subversion Repositories dma_axi

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

////                                                             ////

////  Author: Eyal Hochberg                                      ////

////          eyal@provartec.com                                 ////

////                                                             ////

////  Downloaded from: http://www.opencores.org                  ////

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

////                                                             ////

//// Copyright (C) 2010 Provartec LTD                            ////

//// www.provartec.com                                           ////

//// info@provartec.com                                          ////

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//// This source file may be used and distributed without        ////

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//// removed from the file and that any derivative work contains ////

//// the original copyright notice and the associated disclaimer.////

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//// This source file is free software; you can redistribute it  ////

//// and/or modify it under the terms of the GNU Lesser General  ////

//// Public License as published by the Free Software Foundation.////

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//// useful, but WITHOUT ANY WARRANTY; without even the implied  ////

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//// PURPOSE.  See the GNU Lesser General Public License for more////

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

//-- File generated by RobustVerilog parser

//-- Version: 1.0

//-- Invoked Fri Mar 25 23:36:56 2011

//--

//-- Source file: dma_ch_reg_size.v

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

module dma_axi64_core0_ch_reg_size(clk,reset,update,start_addr,burst_max_size_reg,burst_max_size_other,allow_full_burst,allow_full_fifo,joint_flush,burst_max_size);

   parameter              MAX_BURST     = 0 ? 64 : 128; //16 strobes

   parameter              HALF_BYTES    = 32/2;

   parameter              LARGE_FIFO    = 32 > MAX_BURST;

   parameter              SMALL_FIFO    = 32 == 16;

   input                  clk;

   input              reset;

   input              update;

   input [32-1:0]      start_addr;

   input [8-1:0]      burst_max_size_reg;

   input [8-1:0]      burst_max_size_other;

   input              allow_full_burst;

   input              allow_full_fifo;

   input              joint_flush;

   output [8-1:0]      burst_max_size;

   wire [8-1:0]      burst_max_size_fifo;

   wire [8-1:0]      burst_max_size_pre;

   reg [8-1:0]      burst_max_size;

   assign              burst_max_size_fifo =

                 allow_full_burst | LARGE_FIFO ? MAX_BURST  :

                 joint_flush & SMALL_FIFO      ? HALF_BYTES :

                 (burst_max_size_other > HALF_BYTES) & (burst_max_size_reg > HALF_BYTES) & (burst_max_size_other != burst_max_size_reg)

                                                               ? HALF_BYTES :

                 allow_full_fifo               ? 32 : HALF_BYTES;

   prgen_min2 #(8) min2_max(

                   .a(burst_max_size_reg),

                   .b(burst_max_size_fifo),

                   .min(burst_max_size_pre)

                   );

   always @(posedge clk or posedge reset)

     if (reset)

       burst_max_size <= #1 {8{1'b0}};

     else if (update)

       burst_max_size <= #1 burst_max_size_pre > MAX_BURST ? MAX_BURST : burst_max_size_pre;

endmodule