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🐛 Increase arbiter LSU arbiter depth

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This commit is contained in:
Florian Zaruba 2018-09-28 21:56:59 +02:00
parent 25d2d58d35
commit dcc8d73aa7
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1 changed files with 10 additions and 9 deletions
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19
src/lsu_arbiter.sv
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@ -40,9 +40,10 @@ module lsu_arbiter (
// RR fashion. FIFOs need to be 2 deep in order to unconditionally accept loads and stores since we can
// have a maximum of 2 outstanding loads.
// if there are valid elements in the fifos, the unit posts the result on its output ports and expects it
// to be consumed unconditionally
// to be consumed unconditionally
localparam int DEPTH = 2;
// Important: this needs to be greater than 2 to unconditionally acept incoming requests
localparam int DEPTH = 4;
typedef struct packed {
logic [TRANS_ID_BITS-1:0] trans_id;
@ -64,9 +65,9 @@ module lsu_arbiter (
assign ld_in.result = ld_result_i;
assign ld_in.ex = ld_ex_i;
assign trans_id_o = (idx) ? st_out.trans_id : ld_out.trans_id;
assign result_o = (idx) ? st_out.result : ld_out.result;
assign ex_o = (idx) ? st_out.ex : ld_out.ex;
assign trans_id_o = (idx) ? st_out.trans_id : ld_out.trans_id;
assign result_o = (idx) ? st_out.result : ld_out.result;
assign ex_o = (idx) ? st_out.ex : ld_out.ex;
// round robin with "lookahead" for 2 requesters
rrarbiter #(
@ -85,7 +86,7 @@ module lsu_arbiter (
fifo_v2 #(
.dtype ( fifo_t ),
.DEPTH ( DEPTH )
) i_ld_fifo (
) i_ld_fifo (
.clk_i ( clk_i ),
.rst_ni ( rst_ni ),
.flush_i ( flush_i ),
@ -98,12 +99,12 @@ module lsu_arbiter (
.push_i ( ld_valid_i ),
.data_o ( ld_out ),
.pop_i ( ld_ren )
);
);
fifo_v2 #(
.dtype ( fifo_t ),
.DEPTH ( DEPTH )
) i_st_fifo (
) i_st_fifo (
.clk_i ( clk_i ),
.rst_ni ( rst_ni ),
.flush_i ( flush_i ),
@ -116,7 +117,7 @@ module lsu_arbiter (
.push_i ( st_valid_i ),
.data_o ( st_out ),
.pop_i ( st_ren )
);
);
`ifndef SYNTHESIS