diff options
Diffstat (limited to 'scripts/smt2-bmc/mem_equiv.v')
| -rw-r--r-- | scripts/smt2-bmc/mem_equiv.v | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/scripts/smt2-bmc/mem_equiv.v b/scripts/smt2-bmc/mem_equiv.v new file mode 100644 index 0000000..4c9c3d8 --- /dev/null +++ b/scripts/smt2-bmc/mem_equiv.v @@ -0,0 +1,44 @@ +module main (input clk, resetn, domem, output trap); + parameter [0:0] ENABLE_REGS_DUALPORT = 1; + parameter [0:0] TWO_STAGE_SHIFT = 1; + parameter [0:0] TWO_CYCLE_COMPARE = 0; + parameter [0:0] TWO_CYCLE_ALU = 0; + + (* keep *) wire mem_valid; + (* keep *) wire mem_ready; + (* keep *) wire [31:0] mem_addr; + (* keep *) wire [31:0] mem_wdata; + (* keep *) wire [ 3:0] mem_wstrb; + (* keep *) wire [31:0] mem_rdata; + + picorv32 #( + .ENABLE_REGS_DUALPORT(ENABLE_REGS_DUALPORT), + .TWO_STAGE_SHIFT (TWO_STAGE_SHIFT ), + .TWO_CYCLE_COMPARE (TWO_CYCLE_COMPARE ), + .TWO_CYCLE_ALU (TWO_CYCLE_ALU ) + ) cpu ( + .clk (clk ), + .resetn (resetn ), + .trap (trap ), + .mem_valid(mem_valid), + .mem_ready(mem_ready), + .mem_addr (mem_addr ), + .mem_wdata(mem_wdata), + .mem_wstrb(mem_wstrb), + .mem_rdata(mem_rdata) + ); + + reg [31:0] memory [0:2**30-1]; + + assign mem_ready = domem && resetn && mem_valid; + assign mem_rdata = memory[mem_addr >> 2]; + + always @(posedge clk) begin + if (mem_ready && mem_valid) begin + if (mem_wstrb[0]) memory[mem_addr >> 2][ 7: 0] <= mem_wdata[ 7: 0]; + if (mem_wstrb[1]) memory[mem_addr >> 2][15: 8] <= mem_wdata[15: 8]; + if (mem_wstrb[2]) memory[mem_addr >> 2][23:16] <= mem_wdata[23:16]; + if (mem_wstrb[3]) memory[mem_addr >> 2][31:24] <= mem_wdata[31:24]; + end + end +endmodule |