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ciciec2026/rtl/ip/mlkem/storage/sd_bram.v
FallenSigh c5072d7170 feat: add ML-KEM accelerator with AXI slave wrapper
Wrap mlkem_top in an AXI4 burst slave (mlkem_axi_slave) mapped to the
freed FFT slot 6 at 0x1f400000 (virtual 0xbf400000). The core runs on
sys_clk/2 (25 MHz); the wrapper handles the clock-domain crossing:
start toggle->pulse, wait-stated byte-preload handshake, busy/done
sync, and direct readback taps (ek/dk/ct/ss). CPU drives it via a
register map (CTRL/STATUS/CONFIG, d/z/msg, preload + readback windows).

Wire into soc_top on the existing axiOut_6 nets (no crossbar change),
add mlkem_intr on intrpt[3]. Add sdk mlkem_test example running a
KeyGen->Encaps->Decaps self-consistency round trip.
2026-06-30 01:39:35 +08:00

33 lines
884 B
Verilog

// sd_bram.v - Simple dual-port behavioral RAM (1 read + 1 write port)
//
// Vivado auto-infers this as BRAM when W >= 12 and D >= 64.
// Read: rd_addr sampled at posedge → rd_addr_r → rd_data = mem[rd_addr_r]
// Write: wr_data written to mem[wr_addr] at posedge when wr_en=1
// No valid/ready handshake — pure combinational-read / registered-write memory.
module sd_bram #(
parameter W = 48,
parameter D = 64,
parameter A = 6
) (
input wire clk,
input wire [A-1:0] rd_addr,
output wire [W-1:0] rd_data,
input wire wr_en,
input wire [A-1:0] wr_addr,
input wire [W-1:0] wr_data
);
reg [W-1:0] mem [0:D-1];
reg [A-1:0] rd_addr_r;
always @(posedge clk) begin
rd_addr_r <= rd_addr;
if (wr_en)
mem[wr_addr] <= wr_data;
end
assign rd_data = mem[rd_addr_r];
endmodule