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feat(rtl): migrate CAM interface to handshake protocol with integrated noise generation

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BREAKING CHANGE: CAM write and query interface replaced with standard valid/ready
handshake. wr_en/wr_row/wr_hash → wr_valid/wr_ready/wr_addr/write_hash.
External noise_mask_lanes_flat removed; noise generation now handled internally
by cam_noisy module with configurable rate via parameters.

- cam_top: add parameters (NOISE_EN, NOISE_RATE_NUM/DEN, NOISE_GEN/SAMPLE_BITS, NOISE_SEED)
- cam_top: replace cam_core with cam_noisy (integrated noise generation)
- match_engine: remove external noise_mask_lanes_flat input
- hw/sim: update Makefile with noise parameters and compile args
- hw/sim/model: add generate_write_flip_mask() and xorshift64() matching RTL behavior
- hw/sim/tests: adapt testbench to new handshake protocol
This commit is contained in:
SikongJueluo
2026-05-04 18:02:34 +08:00
parent 0ae6d757dc
commit 2da17e101b
10 changed files with 723 additions and 201 deletions
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7
hw/rtl/match_engine.sv
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@@ -16,9 +16,6 @@ module match_engine (
// To/from cam_core
output logic [(`LANES)*(`ROW_BITS)-1:0] rd_addr_lanes_flat,
input logic [(`LANES)*(`HASH_BITS)-1:0] rd_hash_lanes_flat
`ifdef SIM_NOISE
,input logic [(`LANES)*(`HASH_BITS)-1:0] noise_mask_lanes_flat
`endif
`ifdef SIM_DEBUG
,output logic [(`NUM_ROWS)*(`SCORE_BITS)-1:0] score_debug_flat
`endif
@@ -68,11 +65,7 @@ module match_engine (
assign rd_addr_lanes_flat[lane*`ROW_BITS +: `ROW_BITS] = lane_row[lane];
assign row_hash = rd_hash_lanes_flat[lane*`HASH_BITS +: `HASH_BITS];
`ifdef SIM_NOISE
assign effective_hash = row_hash ^ noise_mask_lanes_flat[lane*`HASH_BITS +: `HASH_BITS];
`else
assign effective_hash = row_hash;
`endif
assign match_bits = ~(query_q ^ effective_hash);