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RTAB add mshr/directory grant mask #124

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Merged
cfuguet merged 4 commits into from
Mar 11, 2026
Merged

RTAB add mshr/directory grant mask #124

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826a0ad
sync changes
shaoqian2001 Jan 19, 2025
2edaf1c
Revert "sync changes"
shaoqian2001 Jan 13, 2026
901d0ce
Merge branch 'master' of https://github.com/openhwgroup/cv-hpdcache
shaoqian2001 Jan 13, 2026
09b3774
add rtab waiter mask
shaoqian2001 Jan 13, 2026
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38 changes: 36 additions & 2 deletions rtl/src/hpdcache_rtab.sv
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Original file line number Diff line number Diff line change
Expand Up @@ -197,6 +197,10 @@
hpdcache_rtab_deps_t[N-1:0] alloc_deps_set;
hpdcache_rtab_deps_t[N-1:0] pop_rback_deps_set;

// bits indicating refill grant
logic [N-1:0] waiters_mshr_full, waiters_mshr_full_gnt;
logic [N-1:0] waiters_dir_unavailable, waiters_dir_unavailable_gnt;

logic [N-1:0] nodeps;
hpdcache_nline_t [N-1:0] nline;
hpdcache_req_addr_t [N-1:0] addr;
Expand Down Expand Up @@ -307,6 +311,36 @@
assign match_flush_nline[gen_i] = (flush_ack_nline_i == nline[gen_i]);
end

// generate bit vector for waiters on mshr full and dir unavailable
for (gen_i = 0; gen_i < N; gen_i++) begin : gen_waiters
assign waiters_mshr_full[gen_i] = valid_q[gen_i] & deps_q[gen_i].mshr_full &
match_refill_mshr_set[gen_i];

Check warning on line 317 in rtl/src/hpdcache_rtab.sv

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GitHub Actions / lint-verilog 

[verible-verilog-lint] reported by reviewdog 🐶
Remove trailing spaces. [Style: trailing-spaces] [no-trailing-spaces]

Raw Output:
message:"Remove trailing spaces. [Style: trailing-spaces] [no-trailing-spaces]"  location:{path:"./rtl/src/hpdcache_rtab.sv"  range:{start:{line:317  column:70}}}  severity:WARNING  source:{name:"verible-verilog-lint"  url:"https://github.com/chipsalliance/verible"}
assign waiters_dir_unavailable[gen_i] = valid_q[gen_i] & deps_q[gen_i].dir_unavailable
& match_refill_set[gen_i];
end

// arbitrate among waiters on mshr full
hpdcache_rrarb #(
.N (N)
) waiters_mshr_full_arb_i (
.clk_i,
.rst_ni,
.req_i (waiters_mshr_full),
.gnt_o (waiters_mshr_full_gnt),
.ready_i (refill_i)
);

// arbitrate among waiters on dir unavailable
hpdcache_rrarb #(
.N (N)
) waiters_dir_unavailable_arb_i (
.clk_i,
.rst_ni,
.req_i (waiters_dir_unavailable),
.gnt_o (waiters_dir_unavailable_gnt),
.ready_i (refill_i)
);

// Update write buffer hit dependencies
// {{{
// Build a bit-vector with HEAD requests waiting for a conflict in the wbuf
Expand Down Expand Up @@ -404,10 +438,10 @@
// Update refill dependencies
// {{{
if (refill_i) begin
deps_rst[i].mshr_full = match_refill_mshr_set[i];
deps_rst[i].mshr_full = waiters_mshr_full_gnt[i];
deps_rst[i].mshr_hit = match_refill_nline[i];
deps_rst[i].write_miss = match_refill_nline[i];
deps_rst[i].dir_unavailable = match_refill_set[i];
deps_rst[i].dir_unavailable = waiters_dir_unavailable_gnt[i];
deps_rst[i].dir_fetch = match_refill_set[i] & match_refill_way[i];
end
// }}}
Expand Down