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adding stream arbiter

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This commit is contained in:
Blaise Tine
2020-12-03 06:40:23 -08:00
parent f575f16f57
commit f3b1069ce8
33 changed files with 717 additions and 745 deletions
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31
hw/rtl/libs/VX_fixed_arbiter.v
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@@ -1,20 +1,24 @@
`include "VX_platform.vh"
module VX_fixed_arbiter #(
parameter N = 1
parameter NUM_REQS = 1,
parameter LOCK_ENABLE = 0,
parameter LOG_NUM_REQS = $clog2(NUM_REQS)
) (
input wire clk,
input wire reset,
input wire [N-1:0] requests,
output wire [`LOG2UP(N)-1:0] grant_index,
output wire [N-1:0] grant_onehot,
output wire grant_valid
input wire clk,
input wire reset,
input wire [NUM_REQS-1:0] requests,
input wire enable,
output wire [LOG_NUM_REQS-1:0] grant_index,
output wire [NUM_REQS-1:0] grant_onehot,
output wire grant_valid
);
`UNUSED_VAR (clk)
`UNUSED_VAR (reset)
`UNUSED_VAR (enable)
if (N == 1) begin
if (NUM_REQS == 1) begin
assign grant_index = 0;
assign grant_onehot = requests;
@@ -22,22 +26,21 @@ module VX_fixed_arbiter #(
end else begin
reg [N-1:0] grant_onehot_r;
VX_priority_encoder # (
.N(N)
.N(NUM_REQS)
) priority_encoder (
.data_in (requests),
.data_out (grant_index),
.valid_out (grant_valid)
);
reg [NUM_REQS-1:0] grant_onehot_r;
always @(*) begin
grant_onehot_r = N'(0);
grant_onehot_r = NUM_REQS'(0);
grant_onehot_r[grant_index] = 1;
end
assign grant_onehot = grant_onehot_r;
assign grant_onehot = grant_onehot_r;
end
endmodule