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round robin arbiter + auto buffered queue + fixed dcache arbiter

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This commit is contained in:
Blaise Tine
2020-06-20 17:56:04 -04:00
parent 9c157e4929
commit d3440de403
30 changed files with 339 additions and 209 deletions
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64
hw/rtl/VX_dcache_arb.v
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@@ -1,48 +1,48 @@
`include "VX_define.vh"
module VX_dcache_arb (
input wire io_select,
input wire req_select,
// Core request
VX_cache_core_req_if core_req_if,
// input request
VX_cache_core_req_if in_core_req_if,
// Dcache request
VX_cache_core_req_if core_dcache_req_if,
// output 0 request
VX_cache_core_req_if out0_core_req_if,
// I/O request
VX_cache_core_req_if core_io_req_if,
// output 1 request
VX_cache_core_req_if out1_core_req_if,
// Dcache response
VX_cache_core_rsp_if core_dcache_rsp_if,
// input 0 response
VX_cache_core_rsp_if in0_core_rsp_if,
// I/O response
VX_cache_core_rsp_if core_io_rsp_if,
// input 1 response
VX_cache_core_rsp_if in1_core_rsp_if,
// Core response
VX_cache_core_rsp_if core_rsp_if
// output response
VX_cache_core_rsp_if out_core_rsp_if
);
assign core_dcache_req_if.core_req_valid = core_req_if.core_req_valid & {`NUM_THREADS{~io_select}};
assign core_dcache_req_if.core_req_rw = core_req_if.core_req_rw;
assign core_dcache_req_if.core_req_byteen = core_req_if.core_req_byteen;
assign core_dcache_req_if.core_req_addr = core_req_if.core_req_addr;
assign core_dcache_req_if.core_req_data = core_req_if.core_req_data;
assign core_dcache_req_if.core_req_tag = core_req_if.core_req_tag;
assign out0_core_req_if.core_req_valid = in_core_req_if.core_req_valid & {`NUM_THREADS{~req_select}};
assign out0_core_req_if.core_req_rw = in_core_req_if.core_req_rw;
assign out0_core_req_if.core_req_byteen = in_core_req_if.core_req_byteen;
assign out0_core_req_if.core_req_addr = in_core_req_if.core_req_addr;
assign out0_core_req_if.core_req_data = in_core_req_if.core_req_data;
assign out0_core_req_if.core_req_tag = in_core_req_if.core_req_tag;
assign core_io_req_if.core_req_valid = core_req_if.core_req_valid & {`NUM_THREADS{io_select}};
assign core_io_req_if.core_req_rw = core_req_if.core_req_rw;
assign core_io_req_if.core_req_byteen = core_req_if.core_req_byteen;
assign core_io_req_if.core_req_addr = core_req_if.core_req_addr;
assign core_io_req_if.core_req_data = core_req_if.core_req_data;
assign core_io_req_if.core_req_tag = core_req_if.core_req_tag;
assign out1_core_req_if.core_req_valid = in_core_req_if.core_req_valid & {`NUM_THREADS{req_select}};
assign out1_core_req_if.core_req_rw = in_core_req_if.core_req_rw;
assign out1_core_req_if.core_req_byteen = in_core_req_if.core_req_byteen;
assign out1_core_req_if.core_req_addr = in_core_req_if.core_req_addr;
assign out1_core_req_if.core_req_data = in_core_req_if.core_req_data;
assign out1_core_req_if.core_req_tag = in_core_req_if.core_req_tag;
assign core_req_if.core_req_ready = io_select ? core_io_req_if.core_req_ready : core_dcache_req_if.core_req_ready;
assign in_core_req_if.core_req_ready = req_select ? out1_core_req_if.core_req_ready : out0_core_req_if.core_req_ready;
wire dcache_rsp_valid = (| core_dcache_rsp_if.core_rsp_valid);
wire rsp_select0 = (| in0_core_rsp_if.core_rsp_valid);
assign core_rsp_if.core_rsp_valid = dcache_rsp_valid ? core_dcache_rsp_if.core_rsp_valid : core_io_rsp_if.core_rsp_valid;
assign core_rsp_if.core_rsp_data = dcache_rsp_valid ? core_dcache_rsp_if.core_rsp_data : core_io_rsp_if.core_rsp_data;
assign core_rsp_if.core_rsp_tag = dcache_rsp_valid ? core_dcache_rsp_if.core_rsp_tag : core_io_rsp_if.core_rsp_tag;
assign core_dcache_rsp_if.core_rsp_ready = core_rsp_if.core_rsp_ready;
assign core_io_rsp_if.core_rsp_ready = core_rsp_if.core_rsp_ready && ~dcache_rsp_valid;
assign out_core_rsp_if.core_rsp_valid = rsp_select0 ? in0_core_rsp_if.core_rsp_valid : in1_core_rsp_if.core_rsp_valid;
assign out_core_rsp_if.core_rsp_data = rsp_select0 ? in0_core_rsp_if.core_rsp_data : in1_core_rsp_if.core_rsp_data;
assign out_core_rsp_if.core_rsp_tag = rsp_select0 ? in0_core_rsp_if.core_rsp_tag : in1_core_rsp_if.core_rsp_tag;
assign in0_core_rsp_if.core_rsp_ready = out_core_rsp_if.core_rsp_ready && rsp_select0;
assign in1_core_rsp_if.core_rsp_ready = out_core_rsp_if.core_rsp_ready && ~rsp_select0;
endmodule