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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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19
hw/rtl/VX_mem_unit.v
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@@ -40,17 +40,18 @@ module VX_mem_unit # (
.CORE_TAG_ID_BITS (`DCORE_TAG_ID_BITS)
) core_dcache_rsp_qual_if(), core_smem_rsp_if();
// use "case equality" to handle uninitialized entry
wire smem_select = (({core_dcache_req_if.core_req_addr[0], 2'b0} >= `SHARED_MEM_BASE_ADDR) === 1'b1);
// select shared memory address
wire is_smem_addr = (({core_dcache_req_if.core_req_addr[0], 2'b0} - `SHARED_MEM_BASE_ADDR) <= `SCACHE_SIZE);
wire smem_select = (| core_dcache_req_if.core_req_valid) ? is_smem_addr : 0;
VX_dcache_arb dcache_smem_arb (
.io_select (smem_select),
.core_req_if (core_dcache_req_if),
.core_dcache_req_if (core_dcache_req_qual_if),
.core_io_req_if (core_smem_req_if),
.core_dcache_rsp_if (core_dcache_rsp_qual_if),
.core_io_rsp_if (core_smem_rsp_if),
.core_rsp_if (core_dcache_rsp_if)
.req_select (smem_select),
.in_core_req_if (core_dcache_req_if),
.out0_core_req_if (core_dcache_req_qual_if),
.out1_core_req_if (core_smem_req_if),
.in0_core_rsp_if (core_dcache_rsp_qual_if),
.in1_core_rsp_if (core_smem_rsp_if),
.out_core_rsp_if (core_dcache_rsp_if)
);
VX_cache #(