| Line 32... |
Line 32... |
*
|
*
|
* general round robin arbiter
|
* general round robin arbiter
|
*
|
*
|
*
|
*
|
******************************************/
|
******************************************/
|
|
`include "pronoc_def.v"
|
|
|
|
|
|
|
module arbiter #(
|
module arbiter #(
|
parameter ARBITER_WIDTH =8
|
parameter ARBITER_WIDTH =8
|
|
|
)
|
)
|
| Line 205... |
Line 208... |
.one_hot_code(grant),
|
.one_hot_code(grant),
|
.bin_code(grant_bcd)
|
.bin_code(grant_bcd)
|
|
|
);
|
);
|
|
|
`ifdef SYNC_RESET_MODE
|
always @ (`pronoc_clk_reset_edge )begin
|
always @ (posedge clk )begin
|
if(`pronoc_reset) begin
|
`else
|
|
always @ (posedge clk or posedge reset)begin
|
|
`endif
|
|
|
|
if(reset) begin
|
|
low_pr <= {ARBITER_BIN_WIDTH{1'b0}};
|
low_pr <= {ARBITER_BIN_WIDTH{1'b0}};
|
end else begin
|
end else begin
|
if(any_grant) low_pr <= grant_bcd;
|
if(any_grant) low_pr <= grant_bcd;
|
end
|
end
|
end
|
end
|
| Line 354... |
Line 352... |
(
|
(
|
.one_hot_code(grant),
|
.one_hot_code(grant),
|
.bin_code(grant_bcd)
|
.bin_code(grant_bcd)
|
);
|
);
|
|
|
`ifdef SYNC_RESET_MODE
|
always @ (`pronoc_clk_reset_edge )begin
|
always @ (posedge clk )begin
|
if(`pronoc_reset) begin
|
`else
|
|
always @ (posedge clk or posedge reset)begin
|
|
`endif
|
|
if(reset) begin
|
|
low_pr <= {ARBITER_BIN_WIDTH{1'b0}};
|
low_pr <= {ARBITER_BIN_WIDTH{1'b0}};
|
end else begin
|
end else begin
|
if(priority_en) low_pr <= grant_bcd;
|
if(priority_en) low_pr <= grant_bcd;
|
end
|
end
|
end
|
end
|
| Line 454... |
Line 448... |
|
|
assign mux_out=(termo2[ARBITER_WIDTH-1])? termo2 : termo1;
|
assign mux_out=(termo2[ARBITER_WIDTH-1])? termo2 : termo1;
|
assign masked_request= request & pr;
|
assign masked_request= request & pr;
|
assign any_grant=termo1[ARBITER_WIDTH-1];
|
assign any_grant=termo1[ARBITER_WIDTH-1];
|
|
|
`ifdef SYNC_RESET_MODE
|
always @ (`pronoc_clk_reset_edge )begin
|
always @ (posedge clk )begin
|
if(`pronoc_reset) pr<= {ARBITER_WIDTH{1'b1}};
|
`else
|
|
always @ (posedge clk or posedge reset)begin
|
|
`endif
|
|
|
|
if(reset) pr<= {ARBITER_WIDTH{1'b1}};
|
|
else begin
|
else begin
|
if(any_grant) pr<= edge_mask;
|
if(any_grant) pr<= edge_mask;
|
end
|
end
|
|
|
end
|
end
|
| Line 528... |
Line 517... |
|
|
assign mux_out=(termo2[ARBITER_WIDTH-1])? termo2 : termo1;
|
assign mux_out=(termo2[ARBITER_WIDTH-1])? termo2 : termo1;
|
assign masked_request= request & pr;
|
assign masked_request= request & pr;
|
assign any_grant=termo1[ARBITER_WIDTH-1];
|
assign any_grant=termo1[ARBITER_WIDTH-1];
|
|
|
`ifdef SYNC_RESET_MODE
|
always @ (`pronoc_clk_reset_edge )begin
|
always @ (posedge clk )begin
|
if(`pronoc_reset) pr<= {ARBITER_WIDTH{1'b1}};
|
`else
|
|
always @ (posedge clk or posedge reset)begin
|
|
`endif
|
|
|
|
if(reset) pr<= {ARBITER_WIDTH{1'b1}};
|
|
else begin
|
else begin
|
if(priority_en) pr<= edge_mask;
|
if(priority_en) pr<= edge_mask;
|
end
|
end
|
|
|
end
|
end
|
| Line 869... |
Line 853... |
|
|
|
|
input [ARBITER_WIDTH-1 : 0] request;
|
input [ARBITER_WIDTH-1 : 0] request;
|
output [ARBITER_WIDTH-1 : 0] grant;
|
output [ARBITER_WIDTH-1 : 0] grant;
|
output any_grant;
|
output any_grant;
|
|
/*
|
|
wire [ARBITER_WIDTH-1 : 0] cout;
|
|
reg [ARBITER_WIDTH-1 : 0] cin;
|
|
|
wire [ARBITER_WIDTH-1 : 0] cout;
|
|
reg [ARBITER_WIDTH-1 : 0] cin;
|
|
|
|
|
|
|
|
|
assign grant = cin & request;
|
|
assign cout = cin & ~request;
|
|
|
|
always @(*) begin
|
|
if( HIGH_PRORITY_BIT == "HSB") cin = {1'b1, cout[ARBITER_WIDTH-1 :1]}; // hsb has highest priority
|
|
else cin = {cout[ARBITER_WIDTH-2 :0] ,1'b1}; // lsb has highest priority
|
|
end//always
|
|
|
|
*/
|
|
|
assign any_grant= | request;
|
assign any_grant= | request;
|
|
wire [ARBITER_WIDTH-1 : 0] termo_code, edge_mask;
|
|
|
|
|
|
genvar i;
|
|
generate
|
|
if( HIGH_PRORITY_BIT == "LSB") begin :hsb
|
|
for(i=0;i<ARBITER_WIDTH;i=i+1)begin :lp
|
|
assign termo_code[i]= | request[i :0];
|
|
end
|
|
assign edge_mask= {termo_code[ARBITER_WIDTH-2:0],1'b0};
|
|
|
|
end else begin :hsb
|
|
for(i=0;i<ARBITER_WIDTH;i=i+1)begin :lp
|
|
assign termo_code[i]= | request[ARBITER_WIDTH-1 :i];
|
|
end
|
|
assign edge_mask= {1'b0, termo_code[ARBITER_WIDTH-1:1]};
|
|
|
|
end
|
|
endgenerate
|
|
|
|
assign grant= termo_code ^ edge_mask;
|
|
|
|
|
assign grant = cin & request;
|
|
assign cout = cin & ~request;
|
|
|
|
always @(*) begin
|
|
if( HIGH_PRORITY_BIT == "HSB") cin = {1'b1, cout[ARBITER_WIDTH-1 :1]}; // hsb has highest priority
|
|
else cin = {cout[ARBITER_WIDTH-2 :0] ,1'b1}; // lsb has highest priority
|
|
end//always
|
|
endmodule
|
endmodule
|
|
|
|
|
|
|
|
|
