fpga/avalon-dma
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
master
avalon-dma/design/dma_verilog/wb_dma_ch_arb.v
Mario Hüttel 9d67bb6b01 init commit
2018-03-06 15:11:37 +01:00

2154 lines
49 KiB
Verilog
Raw Permalink Blame History

/////////////////////////////////////////////////////////////////////
//// ////
//// WISHBONE DMA Channel Arbiter ////
//// ////
//// ////
//// Author: Rudolf Usselmann ////
//// rudi@asics.ws ////
//// ////
//// ////
//// Downloaded from: http://www.opencores.org/cores/wb_dma/ ////
//// ////
/////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2000-2002 Rudolf Usselmann ////
//// www.asics.ws ////
//// rudi@asics.ws ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer.////
//// ////
//// THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY ////
//// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED ////
//// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS ////
//// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR ////
//// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, ////
//// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES ////
//// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE ////
//// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR ////
//// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ////
//// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ////
//// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT ////
//// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE ////
//// POSSIBILITY OF SUCH DAMAGE. ////
//// ////
/////////////////////////////////////////////////////////////////////
// CVS Log
//
// $Id: wb_dma_ch_arb.v,v 1.2 2002-02-01 01:54:44 rudi Exp $
//
// $Date: 2002-02-01 01:54:44 $
// $Revision: 1.2 $
// $Author: rudi $
// $Locker: $
// $State: Exp $
//
// Change History:
// $Log: not supported by cvs2svn $
// Revision 1.1 2001/07/29 08:57:02 rudi
//
//
// 1) Changed Directory Structure
// 2) Added restart signal (REST)
//
// Revision 1.4 2001/06/14 08:51:25 rudi
//
//
// Changed Module name to match file name.
//
// Revision 1.3 2001/06/13 02:26:46 rudi
//
//
// Small changes after running lint.
//
// Revision 1.2 2001/06/05 10:22:34 rudi
//
//
// - Added Support of up to 31 channels
// - Added support for 2,4 and 8 priority levels
// - Now can have up to 31 channels
// - Added many configuration items
// - Changed reset to async
//
// Revision 1.1.1.1 2001/03/19 13:10:47 rudi
// Initial Release
//
//
//
`include "wb_dma_defines.v"
// Arbiter
//
// Implements a simple round robin arbiter for DMA channels of
// same priority
module wb_dma_ch_arb(clk, rst, req, gnt, advance);
input clk;
input rst;
input [30:0] req; // Req input
output [4:0] gnt; // Grant output
input advance; // Next Target
///////////////////////////////////////////////////////////////////////
//
// Definitions
//
parameter [4:0]
grant0 = 5'h0,
grant1 = 5'h1,
grant2 = 5'h2,
grant3 = 5'h3,
grant4 = 5'h4,
grant5 = 5'h5,
grant6 = 5'h6,
grant7 = 5'h7,
grant8 = 5'h8,
grant9 = 5'h9,
grant10 = 5'ha,
grant11 = 5'hb,
grant12 = 5'hc,
grant13 = 5'hd,
grant14 = 5'he,
grant15 = 5'hf,
grant16 = 5'h10,
grant17 = 5'h11,
grant18 = 5'h12,
grant19 = 5'h13,
grant20 = 5'h14,
grant21 = 5'h15,
grant22 = 5'h16,
grant23 = 5'h17,
grant24 = 5'h18,
grant25 = 5'h19,
grant26 = 5'h1a,
grant27 = 5'h1b,
grant28 = 5'h1c,
grant29 = 5'h1d,
grant30 = 5'h1e;
///////////////////////////////////////////////////////////////////////
//
// Local Registers and Wires
//
reg [4:0] state, next_state;
///////////////////////////////////////////////////////////////////////
//
// Misc Logic
//
assign gnt = state;
always@(posedge clk or negedge rst)
if(!rst) state <= #1 grant0;
else state <= #1 next_state;
///////////////////////////////////////////////////////////////////////
//
// Next State Logic
// - implements round robin arbitration algorithm
// - switches grant if current req is dropped or next is asserted
// - parks at last grant
//
always@(state or req or advance)
begin
next_state = state; // Default Keep State
case(state) // synopsys parallel_case full_case
grant0:
// if this req is dropped or next is asserted, check for other req's
if(!req[0] | advance)
begin
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
end
grant1:
// if this req is dropped or next is asserted, check for other req's
if(!req[1] | advance)
begin
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
end
grant2:
// if this req is dropped or next is asserted, check for other req's
if(!req[2] | advance)
begin
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
end
grant3:
// if this req is dropped or next is asserted, check for other req's
if(!req[3] | advance)
begin
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
end
grant4:
// if this req is dropped or next is asserted, check for other req's
if(!req[4] | advance)
begin
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
end
grant5:
// if this req is dropped or next is asserted, check for other req's
if(!req[5] | advance)
begin
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
end
grant6:
// if this req is dropped or next is asserted, check for other req's
if(!req[6] | advance)
begin
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
end
grant7:
// if this req is dropped or next is asserted, check for other req's
if(!req[7] | advance)
begin
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
end
grant8:
// if this req is dropped or next is asserted, check for other req's
if(!req[8] | advance)
begin
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
end
grant9:
// if this req is dropped or next is asserted, check for other req's
if(!req[9] | advance)
begin
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
end
grant10:
// if this req is dropped or next is asserted, check for other req's
if(!req[10] | advance)
begin
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
end
grant11:
// if this req is dropped or next is asserted, check for other req's
if(!req[11] | advance)
begin
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
end
grant12:
// if this req is dropped or next is asserted, check for other req's
if(!req[12] | advance)
begin
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
end
grant13:
// if this req is dropped or next is asserted, check for other req's
if(!req[13] | advance)
begin
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
end
grant14:
// if this req is dropped or next is asserted, check for other req's
if(!req[14] | advance)
begin
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
end
grant15:
// if this req is dropped or next is asserted, check for other req's
if(!req[15] | advance)
begin
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
end
grant16:
// if this req is dropped or next is asserted, check for other req's
if(!req[16] | advance)
begin
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
end
grant17:
// if this req is dropped or next is asserted, check for other req's
if(!req[17] | advance)
begin
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
end
grant18:
// if this req is dropped or next is asserted, check for other req's
if(!req[18] | advance)
begin
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
end
grant19:
// if this req is dropped or next is asserted, check for other req's
if(!req[19] | advance)
begin
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
end
grant20:
// if this req is dropped or next is asserted, check for other req's
if(!req[20] | advance)
begin
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
end
grant21:
// if this req is dropped or next is asserted, check for other req's
if(!req[21] | advance)
begin
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
end
grant22:
// if this req is dropped or next is asserted, check for other req's
if(!req[22] | advance)
begin
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
end
grant23:
// if this req is dropped or next is asserted, check for other req's
if(!req[23] | advance)
begin
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
end
grant24:
// if this req is dropped or next is asserted, check for other req's
if(!req[24] | advance)
begin
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
end
grant25:
// if this req is dropped or next is asserted, check for other req's
if(!req[25] | advance)
begin
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
end
grant26:
// if this req is dropped or next is asserted, check for other req's
if(!req[26] | advance)
begin
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
end
grant27:
// if this req is dropped or next is asserted, check for other req's
if(!req[27] | advance)
begin
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
end
grant28:
// if this req is dropped or next is asserted, check for other req's
if(!req[28] | advance)
begin
if(req[29]) next_state = grant29;
else
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
end
grant29:
// if this req is dropped or next is asserted, check for other req's
if(!req[29] | advance)
begin
if(req[30]) next_state = grant30;
else
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
end
grant30:
// if this req is dropped or next is asserted, check for other req's
if(!req[30] | advance)
begin
if(req[0]) next_state = grant0;
else
if(req[1]) next_state = grant1;
else
if(req[2]) next_state = grant2;
else
if(req[3]) next_state = grant3;
else
if(req[4]) next_state = grant4;
else
if(req[5]) next_state = grant5;
else
if(req[6]) next_state = grant6;
else
if(req[7]) next_state = grant7;
else
if(req[8]) next_state = grant8;
else
if(req[9]) next_state = grant9;
else
if(req[10]) next_state = grant10;
else
if(req[11]) next_state = grant11;
else
if(req[12]) next_state = grant12;
else
if(req[13]) next_state = grant13;
else
if(req[14]) next_state = grant14;
else
if(req[15]) next_state = grant15;
else
if(req[16]) next_state = grant16;
else
if(req[17]) next_state = grant17;
else
if(req[18]) next_state = grant18;
else
if(req[19]) next_state = grant19;
else
if(req[20]) next_state = grant20;
else
if(req[21]) next_state = grant21;
else
if(req[22]) next_state = grant22;
else
if(req[23]) next_state = grant23;
else
if(req[24]) next_state = grant24;
else
if(req[25]) next_state = grant25;
else
if(req[26]) next_state = grant26;
else
if(req[27]) next_state = grant27;
else
if(req[28]) next_state = grant28;
else
if(req[29]) next_state = grant29;
end
endcase
end
endmodule
Reference in New Issue View Git Blame Copy Permalink