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OPAE CSR access

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This commit is contained in:
Blaise Tine
2020-06-30 18:14:06 -07:00
parent 582a00d690
commit 83a1695c73
19 changed files with 224 additions and 157 deletions
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35
hw/rtl/VX_csr_io_arb.v
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@@ -4,12 +4,13 @@ module VX_csr_io_arb #(
parameter NUM_REQUESTS = 1,
parameter REQS_BITS = `CLOG2(NUM_REQUESTS)
) (
input wire clk,
input wire reset,
input wire clk,
input wire reset,
input wire [REQS_BITS-1:0] request_id,
// input requests
input wire in_csr_io_req_valid,
input wire [`NC_BITS-1:0] in_csr_io_req_coreid,
input wire [11:0] in_csr_io_req_addr,
input wire in_csr_io_req_rw,
input wire [31:0] in_csr_io_req_data,
@@ -22,7 +23,6 @@ module VX_csr_io_arb #(
// output request
output wire [NUM_REQUESTS-1:0] out_csr_io_req_valid,
output wire [NUM_REQUESTS-1:0][`NC_BITS-1:0] out_csr_io_req_coreid,
output wire [NUM_REQUESTS-1:0][11:0] out_csr_io_req_addr,
output wire [NUM_REQUESTS-1:0] out_csr_io_req_rw,
output wire [NUM_REQUESTS-1:0][31:0] out_csr_io_req_data,
@@ -39,7 +39,6 @@ module VX_csr_io_arb #(
`UNUSED_VAR (reset)
assign out_csr_io_req_valid = in_csr_io_req_valid;
assign out_csr_io_req_coreid = in_csr_io_req_coreid;
assign out_csr_io_req_rw = in_csr_io_req_rw;
assign out_csr_io_req_addr = in_csr_io_req_addr;
assign out_csr_io_req_data = in_csr_io_req_data;
@@ -51,6 +50,17 @@ module VX_csr_io_arb #(
end else begin
genvar i;
for (i = 0; i < NUM_REQUESTS; i++) begin
assign out_csr_io_req_valid[i] = in_csr_io_req_valid && (request_id == `REQS_BITS'(i));
assign out_csr_io_req_rw[i] = in_csr_io_req_rw;
assign out_csr_io_req_addr[i] = in_csr_io_req_addr;
assign out_csr_io_req_data[i] = in_csr_io_req_data;
end
assign in_csr_io_req_ready = out_csr_io_req_ready[request_id];
reg [REQS_BITS-1:0] bus_rsp_sel;
VX_fixed_arbiter #(
@@ -65,20 +75,11 @@ module VX_csr_io_arb #(
);
assign out_csr_io_rsp_valid = in_csr_io_rsp_valid [bus_rsp_sel];
assign out_csr_io_rsp_data = in_csr_io_rsp_data [bus_rsp_sel];
assign in_csr_io_rsp_ready [bus_rsp_sel] = out_csr_io_rsp_ready;
assign out_csr_io_rsp_data = in_csr_io_rsp_data [bus_rsp_sel];
genvar i;
for (i = 0; i < NUM_REQUESTS; i++) begin
assign out_csr_io_req_valid[i] = in_csr_io_req_valid && in_csr_io_req_ready;
assign out_csr_io_req_coreid[i] = in_csr_io_req_coreid;
assign out_csr_io_req_rw[i] = in_csr_io_req_rw;
assign out_csr_io_req_addr[i] = in_csr_io_req_addr;
assign out_csr_io_req_data[i] = in_csr_io_req_data;
for (i = 0; i < NUM_REQUESTS; i++) begin
assign in_csr_io_rsp_ready[i] = out_csr_io_rsp_ready && (bus_rsp_sel == `REQS_BITS'(i));
end
assign in_csr_io_req_ready = (& out_csr_io_req_ready);
end