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Delete axi ez sp.

This commit is contained in:
colin.liang 2023-01-09 15:33:37 +08:00
parent c676992a07
commit f02c0b23c4
5 changed files with 9 additions and 794 deletions
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44
Makefile
View File

@ -21,58 +21,21 @@ COMPRESSED_ISA = C
# Add things like "export http_proxy=... https_proxy=..." here # Add things like "export http_proxy=... https_proxy=..." here
GIT_ENV = true GIT_ENV = true
test: testbench.vvp firmware/firmware.hex
$(VVP) -N $<
test_vcd: testbench.vvp firmware/firmware.hex
$(VVP) -N $< +vcd +trace +noerror
test_wb: testbench_wb.vvp firmware/firmware.hex test_wb: testbench_wb.vvp firmware/firmware.hex
$(VVP) -N $< $(VVP) -N $<
test_wb_vcd: testbench_wb.vvp firmware/firmware.hex test_wb_vcd: testbench_wb.vvp firmware/firmware.hex
$(VVP) -N $< +vcd +trace +noerror $(VVP) -N $< +vcd +trace +noerror
test_ez: testbench_ez.vvp
$(VVP) -N $<
test_ez_vcd: testbench_ez.vvp
$(VVP) -N $< +vcd
test_sp: testbench_sp.vvp firmware/firmware.hex
$(VVP) -N $<
test_axi: testbench.vvp firmware/firmware.hex
$(VVP) -N $< +axi_test
test_synth: testbench_synth.vvp firmware/firmware.hex
$(VVP) -N $<
test_verilator: testbench_verilator firmware/firmware.hex test_verilator: testbench_verilator firmware/firmware.hex
./testbench_verilator ./testbench_verilator
testbench.vvp: testbench.v picorv32.v
$(IVERILOG) -o $@ $(subst C,-DCOMPRESSED_ISA,$(COMPRESSED_ISA)) $^
chmod -x $@
testbench_wb.vvp: testbench_wb.v picorv32.v testbench_wb.vvp: testbench_wb.v picorv32.v
$(IVERILOG) -o $@ $(subst C,-DCOMPRESSED_ISA,$(COMPRESSED_ISA)) $^ $(IVERILOG) -o $@ $(subst C,-DCOMPRESSED_ISA,$(COMPRESSED_ISA)) $^
chmod -x $@ chmod -x $@
testbench_ez.vvp: testbench_ez.v picorv32.v testbench_verilator: testbench_wb.v picorv32.v testbench.cc
$(IVERILOG) -o $@ $(subst C,-DCOMPRESSED_ISA,$(COMPRESSED_ISA)) $^ $(VERILATOR) --cc --exe -Wno-lint -trace --top-module picorv32_wrapper testbench_wb.v picorv32.v testbench.cc \
chmod -x $@
testbench_sp.vvp: testbench.v picorv32.v
$(IVERILOG) -o $@ $(subst C,-DCOMPRESSED_ISA,$(COMPRESSED_ISA)) -DSP_TEST $^
chmod -x $@
testbench_synth.vvp: testbench.v synth.v
$(IVERILOG) -o $@ -DSYNTH_TEST $^
chmod -x $@
testbench_verilator: testbench.v picorv32.v testbench.cc
$(VERILATOR) --cc --exe -Wno-lint -trace --top-module picorv32_wrapper testbench.v picorv32.v testbench.cc \
$(subst C,-DCOMPRESSED_ISA,$(COMPRESSED_ISA)) --Mdir testbench_verilator_dir $(subst C,-DCOMPRESSED_ISA,$(COMPRESSED_ISA)) --Mdir testbench_verilator_dir
$(MAKE) -C testbench_verilator_dir -f Vpicorv32_wrapper.mk $(MAKE) -C testbench_verilator_dir -f Vpicorv32_wrapper.mk
cp testbench_verilator_dir/Vpicorv32_wrapper testbench_verilator cp testbench_verilator_dir/Vpicorv32_wrapper testbench_verilator
@ -170,8 +133,7 @@ clean:
riscv-gnu-toolchain-riscv32im riscv-gnu-toolchain-riscv32imc riscv-gnu-toolchain-riscv32im riscv-gnu-toolchain-riscv32imc
rm -vrf $(FIRMWARE_OBJS) $(TEST_OBJS) check.smt2 check.vcd synth.v synth.log \ rm -vrf $(FIRMWARE_OBJS) $(TEST_OBJS) check.smt2 check.vcd synth.v synth.log \
firmware/firmware.elf firmware/firmware.bin firmware/firmware.hex firmware/firmware.map \ firmware/firmware.elf firmware/firmware.bin firmware/firmware.hex firmware/firmware.map \
testbench.vvp testbench_sp.vvp testbench_synth.vvp testbench_ez.vvp \
testbench_wb.vvp testbench.vcd testbench.trace \ testbench_wb.vvp testbench.vcd testbench.trace \
testbench_verilator testbench_verilator_dir testbench_verilator testbench_verilator_dir
.PHONY: test test_vcd test_sp test_axi test_wb test_wb_vcd test_ez test_ez_vcd test_synth download-tools build-tools toc clean .PHONY: test_wb test_wb_vcd download-tools build-tools toc clean

253
picorv32.v
View File

@ -2236,259 +2236,6 @@ module picorv32_pcpi_div (
endmodule endmodule
/***************************************************************
* picorv32_axi
***************************************************************/
module picorv32_axi #(
parameter [ 0:0] ENABLE_COUNTERS = 1,
parameter [ 0:0] ENABLE_COUNTERS64 = 1,
parameter [ 0:0] ENABLE_REGS_16_31 = 1,
parameter [ 0:0] ENABLE_REGS_DUALPORT = 1,
parameter [ 0:0] TWO_STAGE_SHIFT = 1,
parameter [ 0:0] BARREL_SHIFTER = 0,
parameter [ 0:0] TWO_CYCLE_COMPARE = 0,
parameter [ 0:0] TWO_CYCLE_ALU = 0,
parameter [ 0:0] COMPRESSED_ISA = 0,
parameter [ 0:0] CATCH_MISALIGN = 1,
parameter [ 0:0] CATCH_ILLINSN = 1,
parameter [ 0:0] ENABLE_PCPI = 0,
parameter [ 0:0] ENABLE_MUL = 0,
parameter [ 0:0] ENABLE_FAST_MUL = 0,
parameter [ 0:0] ENABLE_DIV = 0,
parameter [ 0:0] ENABLE_IRQ = 0,
parameter [ 0:0] ENABLE_IRQ_QREGS = 1,
parameter [ 0:0] ENABLE_IRQ_TIMER = 1,
parameter [ 0:0] ENABLE_TRACE = 0,
parameter [ 0:0] REGS_INIT_ZERO = 0,
parameter [31:0] MASKED_IRQ = 32'h 0000_0000,
parameter [31:0] LATCHED_IRQ = 32'h ffff_ffff,
parameter [31:0] PROGADDR_RESET = 32'h 0000_0000,
parameter [31:0] PROGADDR_IRQ = 32'h 0000_0010,
parameter [31:0] STACKADDR = 32'h ffff_ffff
) (
input clk, resetn,
output trap,
// AXI4-lite master memory interface
output mem_axi_awvalid,
input mem_axi_awready,
output [31:0] mem_axi_awaddr,
output [ 2:0] mem_axi_awprot,
output mem_axi_wvalid,
input mem_axi_wready,
output [31:0] mem_axi_wdata,
output [ 3:0] mem_axi_wstrb,
input mem_axi_bvalid,
output mem_axi_bready,
output mem_axi_arvalid,
input mem_axi_arready,
output [31:0] mem_axi_araddr,
output [ 2:0] mem_axi_arprot,
input mem_axi_rvalid,
output mem_axi_rready,
input [31:0] mem_axi_rdata,
// Pico Co-Processor Interface (PCPI)
output pcpi_valid,
output [31:0] pcpi_insn,
output [31:0] pcpi_rs1,
output [31:0] pcpi_rs2,
input pcpi_wr,
input [31:0] pcpi_rd,
input pcpi_wait,
input pcpi_ready,
// IRQ interface
input [31:0] irq,
output [31:0] eoi,
// Trace Interface
output trace_valid,
output [35:0] trace_data
);
wire mem_valid;
wire [31:0] mem_addr;
wire [31:0] mem_wdata;
wire [ 3:0] mem_wstrb;
wire mem_instr;
wire mem_ready;
wire [31:0] mem_rdata;
picorv32_axi_adapter axi_adapter (
.clk (clk ),
.resetn (resetn ),
.mem_axi_awvalid(mem_axi_awvalid),
.mem_axi_awready(mem_axi_awready),
.mem_axi_awaddr (mem_axi_awaddr ),
.mem_axi_awprot (mem_axi_awprot ),
.mem_axi_wvalid (mem_axi_wvalid ),
.mem_axi_wready (mem_axi_wready ),
.mem_axi_wdata (mem_axi_wdata ),
.mem_axi_wstrb (mem_axi_wstrb ),
.mem_axi_bvalid (mem_axi_bvalid ),
.mem_axi_bready (mem_axi_bready ),
.mem_axi_arvalid(mem_axi_arvalid),
.mem_axi_arready(mem_axi_arready),
.mem_axi_araddr (mem_axi_araddr ),
.mem_axi_arprot (mem_axi_arprot ),
.mem_axi_rvalid (mem_axi_rvalid ),
.mem_axi_rready (mem_axi_rready ),
.mem_axi_rdata (mem_axi_rdata ),
.mem_valid (mem_valid ),
.mem_instr (mem_instr ),
.mem_ready (mem_ready ),
.mem_addr (mem_addr ),
.mem_wdata (mem_wdata ),
.mem_wstrb (mem_wstrb ),
.mem_rdata (mem_rdata )
);
picorv32 #(
.ENABLE_COUNTERS (ENABLE_COUNTERS ),
.ENABLE_COUNTERS64 (ENABLE_COUNTERS64 ),
.ENABLE_REGS_16_31 (ENABLE_REGS_16_31 ),
.ENABLE_REGS_DUALPORT(ENABLE_REGS_DUALPORT),
.TWO_STAGE_SHIFT (TWO_STAGE_SHIFT ),
.BARREL_SHIFTER (BARREL_SHIFTER ),
.TWO_CYCLE_COMPARE (TWO_CYCLE_COMPARE ),
.TWO_CYCLE_ALU (TWO_CYCLE_ALU ),
.COMPRESSED_ISA (COMPRESSED_ISA ),
.CATCH_MISALIGN (CATCH_MISALIGN ),
.CATCH_ILLINSN (CATCH_ILLINSN ),
.ENABLE_PCPI (ENABLE_PCPI ),
.ENABLE_MUL (ENABLE_MUL ),
.ENABLE_FAST_MUL (ENABLE_FAST_MUL ),
.ENABLE_DIV (ENABLE_DIV ),
.ENABLE_IRQ (ENABLE_IRQ ),
.ENABLE_IRQ_QREGS (ENABLE_IRQ_QREGS ),
.ENABLE_IRQ_TIMER (ENABLE_IRQ_TIMER ),
.ENABLE_TRACE (ENABLE_TRACE ),
.REGS_INIT_ZERO (REGS_INIT_ZERO ),
.MASKED_IRQ (MASKED_IRQ ),
.LATCHED_IRQ (LATCHED_IRQ ),
.PROGADDR_RESET (PROGADDR_RESET ),
.PROGADDR_IRQ (PROGADDR_IRQ ),
.STACKADDR (STACKADDR )
) picorv32_core (
.clk (clk ),
.resetn (resetn),
.trap (trap ),
.mem_valid(mem_valid),
.mem_addr (mem_addr ),
.mem_wdata(mem_wdata),
.mem_wstrb(mem_wstrb),
.mem_instr(mem_instr),
.mem_ready(mem_ready),
.mem_rdata(mem_rdata),
.pcpi_valid(pcpi_valid),
.pcpi_insn (pcpi_insn ),
.pcpi_rs1 (pcpi_rs1 ),
.pcpi_rs2 (pcpi_rs2 ),
.pcpi_wr (pcpi_wr ),
.pcpi_rd (pcpi_rd ),
.pcpi_wait (pcpi_wait ),
.pcpi_ready(pcpi_ready),
.irq(irq),
.eoi(eoi),
.trace_valid(trace_valid),
.trace_data (trace_data)
);
endmodule
/***************************************************************
* picorv32_axi_adapter
***************************************************************/
module picorv32_axi_adapter (
input clk, resetn,
// AXI4-lite master memory interface
output mem_axi_awvalid,
input mem_axi_awready,
output [31:0] mem_axi_awaddr,
output [ 2:0] mem_axi_awprot,
output mem_axi_wvalid,
input mem_axi_wready,
output [31:0] mem_axi_wdata,
output [ 3:0] mem_axi_wstrb,
input mem_axi_bvalid,
output mem_axi_bready,
output mem_axi_arvalid,
input mem_axi_arready,
output [31:0] mem_axi_araddr,
output [ 2:0] mem_axi_arprot,
input mem_axi_rvalid,
output mem_axi_rready,
input [31:0] mem_axi_rdata,
// Native PicoRV32 memory interface
input mem_valid,
input mem_instr,
output mem_ready,
input [31:0] mem_addr,
input [31:0] mem_wdata,
input [ 3:0] mem_wstrb,
output [31:0] mem_rdata
);
reg ack_awvalid;
reg ack_arvalid;
reg ack_wvalid;
reg xfer_done;
assign mem_axi_awvalid = mem_valid && |mem_wstrb && !ack_awvalid;
assign mem_axi_awaddr = mem_addr;
assign mem_axi_awprot = 0;
assign mem_axi_arvalid = mem_valid && !mem_wstrb && !ack_arvalid;
assign mem_axi_araddr = mem_addr;
assign mem_axi_arprot = mem_instr ? 3'b100 : 3'b000;
assign mem_axi_wvalid = mem_valid && |mem_wstrb && !ack_wvalid;
assign mem_axi_wdata = mem_wdata;
assign mem_axi_wstrb = mem_wstrb;
assign mem_ready = mem_axi_bvalid || mem_axi_rvalid;
assign mem_axi_bready = mem_valid && |mem_wstrb;
assign mem_axi_rready = mem_valid && !mem_wstrb;
assign mem_rdata = mem_axi_rdata;
always @(posedge clk) begin
if (!resetn) begin
ack_awvalid <= 0;
end else begin
xfer_done <= mem_valid && mem_ready;
if (mem_axi_awready && mem_axi_awvalid)
ack_awvalid <= 1;
if (mem_axi_arready && mem_axi_arvalid)
ack_arvalid <= 1;
if (mem_axi_wready && mem_axi_wvalid)
ack_wvalid <= 1;
if (xfer_done || !mem_valid) begin
ack_awvalid <= 0;
ack_arvalid <= 0;
ack_wvalid <= 0;
end
end
end
endmodule
/*************************************************************** /***************************************************************
* picorv32_wb * picorv32_wb
***************************************************************/ ***************************************************************/

10
testbench.cc
View File

@ -26,15 +26,17 @@ int main(int argc, char **argv, char **env)
trace_fd = fopen("testbench.trace", "w"); trace_fd = fopen("testbench.trace", "w");
} }
top->clk = 0; top->wb_clk = 0;
top->wb_rst = 1;
int t = 0; int t = 0;
while (!Verilated::gotFinish()) { while (!Verilated::gotFinish()) {
if (t > 200) if (t > 200)
top->resetn = 1; top->wb_rst = 0;
top->clk = !top->clk; top->wb_clk = !top->wb_clk;
top->eval(); top->eval();
if (tfp) tfp->dump (t); if (tfp) tfp->dump (t);
if (trace_fd && top->clk && top->trace_valid) fprintf(trace_fd, "%9.9lx\n", top->trace_data); if (trace_fd && top->wb_clk && top->trace_valid) fprintf(trace_fd, "%9.9lx\n", top->trace_data);
t += 5; t += 5;
} }
if (tfp) tfp->close(); if (tfp) tfp->close();

410
testbench.v
View File

@ -1,410 +0,0 @@
// This is free and unencumbered software released into the public domain.
//
// Anyone is free to copy, modify, publish, use, compile, sell, or
// distribute this software, either in source code form or as a compiled
// binary, for any purpose, commercial or non-commercial, and by any
// means.
`timescale 1 ns / 1 ps
`ifndef VERILATOR
module testbench #(
parameter AXI_TEST = 0,
parameter VERBOSE = 0
);
reg clk = 1;
reg resetn = 0;
wire trap;
always #5 clk = ~clk;
initial begin
repeat (100) @(posedge clk);
resetn <= 1;
end
initial begin
if ($test$plusargs("vcd")) begin
$dumpfile("testbench.vcd");
$dumpvars(0, testbench);
end
repeat (1000000) @(posedge clk);
$display("TIMEOUT");
$finish;
end
wire trace_valid;
wire [35:0] trace_data;
integer trace_file;
initial begin
if ($test$plusargs("trace")) begin
trace_file = $fopen("testbench.trace", "w");
repeat (10) @(posedge clk);
while (!trap) begin
@(posedge clk);
if (trace_valid)
$fwrite(trace_file, "%x\n", trace_data);
end
$fclose(trace_file);
$display("Finished writing testbench.trace.");
end
end
picorv32_wrapper #(
.AXI_TEST (AXI_TEST),
.VERBOSE (VERBOSE)
) top (
.clk(clk),
.resetn(resetn),
.trap(trap),
.trace_valid(trace_valid),
.trace_data(trace_data)
);
endmodule
`endif
module picorv32_wrapper #(
parameter AXI_TEST = 0,
parameter VERBOSE = 0
) (
input clk,
input resetn,
output trap,
output trace_valid,
output [35:0] trace_data
);
wire tests_passed;
reg [31:0] irq = 0;
reg [15:0] count_cycle = 0;
always @(posedge clk) count_cycle <= resetn ? count_cycle + 1 : 0;
always @* begin
irq = 0;
irq[4] = &count_cycle[12:0];
irq[5] = &count_cycle[15:0];
end
wire mem_axi_awvalid;
wire mem_axi_awready;
wire [31:0] mem_axi_awaddr;
wire [ 2:0] mem_axi_awprot;
wire mem_axi_wvalid;
wire mem_axi_wready;
wire [31:0] mem_axi_wdata;
wire [ 3:0] mem_axi_wstrb;
wire mem_axi_bvalid;
wire mem_axi_bready;
wire mem_axi_arvalid;
wire mem_axi_arready;
wire [31:0] mem_axi_araddr;
wire [ 2:0] mem_axi_arprot;
wire mem_axi_rvalid;
wire mem_axi_rready;
wire [31:0] mem_axi_rdata;
axi4_memory #(
.AXI_TEST (AXI_TEST),
.VERBOSE (VERBOSE)
) mem (
.clk (clk ),
.mem_axi_awvalid (mem_axi_awvalid ),
.mem_axi_awready (mem_axi_awready ),
.mem_axi_awaddr (mem_axi_awaddr ),
.mem_axi_awprot (mem_axi_awprot ),
.mem_axi_wvalid (mem_axi_wvalid ),
.mem_axi_wready (mem_axi_wready ),
.mem_axi_wdata (mem_axi_wdata ),
.mem_axi_wstrb (mem_axi_wstrb ),
.mem_axi_bvalid (mem_axi_bvalid ),
.mem_axi_bready (mem_axi_bready ),
.mem_axi_arvalid (mem_axi_arvalid ),
.mem_axi_arready (mem_axi_arready ),
.mem_axi_araddr (mem_axi_araddr ),
.mem_axi_arprot (mem_axi_arprot ),
.mem_axi_rvalid (mem_axi_rvalid ),
.mem_axi_rready (mem_axi_rready ),
.mem_axi_rdata (mem_axi_rdata ),
.tests_passed (tests_passed )
);
picorv32_axi #(
`ifndef SYNTH_TEST
`ifdef SP_TEST
.ENABLE_REGS_DUALPORT(0),
`endif
`ifdef COMPRESSED_ISA
.COMPRESSED_ISA(1),
`endif
.ENABLE_MUL(1),
.ENABLE_DIV(1),
.ENABLE_IRQ(1),
.ENABLE_TRACE(1)
`endif
) uut (
.clk (clk ),
.resetn (resetn ),
.trap (trap ),
.mem_axi_awvalid(mem_axi_awvalid),
.mem_axi_awready(mem_axi_awready),
.mem_axi_awaddr (mem_axi_awaddr ),
.mem_axi_awprot (mem_axi_awprot ),
.mem_axi_wvalid (mem_axi_wvalid ),
.mem_axi_wready (mem_axi_wready ),
.mem_axi_wdata (mem_axi_wdata ),
.mem_axi_wstrb (mem_axi_wstrb ),
.mem_axi_bvalid (mem_axi_bvalid ),
.mem_axi_bready (mem_axi_bready ),
.mem_axi_arvalid(mem_axi_arvalid),
.mem_axi_arready(mem_axi_arready),
.mem_axi_araddr (mem_axi_araddr ),
.mem_axi_arprot (mem_axi_arprot ),
.mem_axi_rvalid (mem_axi_rvalid ),
.mem_axi_rready (mem_axi_rready ),
.mem_axi_rdata (mem_axi_rdata ),
.irq (irq ),
.trace_valid (trace_valid ),
.trace_data (trace_data )
);
reg [1023:0] firmware_file;
initial begin
if (!$value$plusargs("firmware=%s", firmware_file))
firmware_file = "firmware/firmware.hex";
$readmemh(firmware_file, mem.memory);
end
integer cycle_counter;
always @(posedge clk) begin
cycle_counter <= resetn ? cycle_counter + 1 : 0;
if (resetn && trap) begin
`ifndef VERILATOR
repeat (10) @(posedge clk);
`endif
$display("TRAP after %1d clock cycles", cycle_counter);
if (tests_passed) begin
$display("ALL TESTS PASSED.");
$finish;
end else begin
$display("ERROR!");
if ($test$plusargs("noerror"))
$finish;
$stop;
end
end
end
endmodule
module axi4_memory #(
parameter AXI_TEST = 0,
parameter VERBOSE = 0
) (
/* verilator lint_off MULTIDRIVEN */
input clk,
input mem_axi_awvalid,
output reg mem_axi_awready,
input [31:0] mem_axi_awaddr,
input [ 2:0] mem_axi_awprot,
input mem_axi_wvalid,
output reg mem_axi_wready,
input [31:0] mem_axi_wdata,
input [ 3:0] mem_axi_wstrb,
output reg mem_axi_bvalid,
input mem_axi_bready,
input mem_axi_arvalid,
output reg mem_axi_arready,
input [31:0] mem_axi_araddr,
input [ 2:0] mem_axi_arprot,
output reg mem_axi_rvalid,
input mem_axi_rready,
output reg [31:0] mem_axi_rdata,
output reg tests_passed
);
reg [31:0] memory [0:128*1024/4-1] /* verilator public */;
reg verbose;
initial verbose = $test$plusargs("verbose") || VERBOSE;
reg axi_test;
initial axi_test = $test$plusargs("axi_test") || AXI_TEST;
initial begin
mem_axi_awready = 0;
mem_axi_wready = 0;
mem_axi_bvalid = 0;
mem_axi_arready = 0;
mem_axi_rvalid = 0;
tests_passed = 0;
end
reg [63:0] xorshift64_state = 64'd88172645463325252;
task xorshift64_next;
begin
// see page 4 of Marsaglia, George (July 2003). "Xorshift RNGs". Journal of Statistical Software 8 (14).
xorshift64_state = xorshift64_state ^ (xorshift64_state << 13);
xorshift64_state = xorshift64_state ^ (xorshift64_state >> 7);
xorshift64_state = xorshift64_state ^ (xorshift64_state << 17);
end
endtask
reg [2:0] fast_axi_transaction = ~0;
reg [4:0] async_axi_transaction = ~0;
reg [4:0] delay_axi_transaction = 0;
always @(posedge clk) begin
if (axi_test) begin
xorshift64_next;
{fast_axi_transaction, async_axi_transaction, delay_axi_transaction} <= xorshift64_state;
end
end
reg latched_raddr_en = 0;
reg latched_waddr_en = 0;
reg latched_wdata_en = 0;
reg fast_raddr = 0;
reg fast_waddr = 0;
reg fast_wdata = 0;
reg [31:0] latched_raddr;
reg [31:0] latched_waddr;
reg [31:0] latched_wdata;
reg [ 3:0] latched_wstrb;
reg latched_rinsn;
task handle_axi_arvalid; begin
mem_axi_arready <= 1;
latched_raddr = mem_axi_araddr;
latched_rinsn = mem_axi_arprot[2];
latched_raddr_en = 1;
fast_raddr <= 1;
end endtask
task handle_axi_awvalid; begin
mem_axi_awready <= 1;
latched_waddr = mem_axi_awaddr;
latched_waddr_en = 1;
fast_waddr <= 1;
end endtask
task handle_axi_wvalid; begin
mem_axi_wready <= 1;
latched_wdata = mem_axi_wdata;
latched_wstrb = mem_axi_wstrb;
latched_wdata_en = 1;
fast_wdata <= 1;
end endtask
task handle_axi_rvalid; begin
if (verbose)
$display("RD: ADDR=%08x DATA=%08x%s", latched_raddr, memory[latched_raddr >> 2], latched_rinsn ? " INSN" : "");
if (latched_raddr < 128*1024) begin
mem_axi_rdata <= memory[latched_raddr >> 2];
mem_axi_rvalid <= 1;
latched_raddr_en = 0;
end else begin
$display("OUT-OF-BOUNDS MEMORY READ FROM %08x", latched_raddr);
$finish;
end
end endtask
task handle_axi_bvalid; begin
if (verbose)
$display("WR: ADDR=%08x DATA=%08x STRB=%04b", latched_waddr, latched_wdata, latched_wstrb);
if (latched_waddr < 128*1024) begin
if (latched_wstrb[0]) memory[latched_waddr >> 2][ 7: 0] <= latched_wdata[ 7: 0];
if (latched_wstrb[1]) memory[latched_waddr >> 2][15: 8] <= latched_wdata[15: 8];
if (latched_wstrb[2]) memory[latched_waddr >> 2][23:16] <= latched_wdata[23:16];
if (latched_wstrb[3]) memory[latched_waddr >> 2][31:24] <= latched_wdata[31:24];
end else
if (latched_waddr == 32'h1000_0000) begin
if (verbose) begin
if (32 <= latched_wdata && latched_wdata < 128)
$display("OUT: '%c'", latched_wdata[7:0]);
else
$display("OUT: %3d", latched_wdata);
end else begin
$write("%c", latched_wdata[7:0]);
`ifndef VERILATOR
$fflush();
`endif
end
end else
if (latched_waddr == 32'h2000_0000) begin
if (latched_wdata == 123456789)
tests_passed = 1;
end else begin
$display("OUT-OF-BOUNDS MEMORY WRITE TO %08x", latched_waddr);
$finish;
end
mem_axi_bvalid <= 1;
latched_waddr_en = 0;
latched_wdata_en = 0;
end endtask
always @(negedge clk) begin
if (mem_axi_arvalid && !(latched_raddr_en || fast_raddr) && async_axi_transaction[0]) handle_axi_arvalid;
if (mem_axi_awvalid && !(latched_waddr_en || fast_waddr) && async_axi_transaction[1]) handle_axi_awvalid;
if (mem_axi_wvalid && !(latched_wdata_en || fast_wdata) && async_axi_transaction[2]) handle_axi_wvalid;
if (!mem_axi_rvalid && latched_raddr_en && async_axi_transaction[3]) handle_axi_rvalid;
if (!mem_axi_bvalid && latched_waddr_en && latched_wdata_en && async_axi_transaction[4]) handle_axi_bvalid;
end
always @(posedge clk) begin
mem_axi_arready <= 0;
mem_axi_awready <= 0;
mem_axi_wready <= 0;
fast_raddr <= 0;
fast_waddr <= 0;
fast_wdata <= 0;
if (mem_axi_rvalid && mem_axi_rready) begin
mem_axi_rvalid <= 0;
end
if (mem_axi_bvalid && mem_axi_bready) begin
mem_axi_bvalid <= 0;
end
if (mem_axi_arvalid && mem_axi_arready && !fast_raddr) begin
latched_raddr = mem_axi_araddr;
latched_rinsn = mem_axi_arprot[2];
latched_raddr_en = 1;
end
if (mem_axi_awvalid && mem_axi_awready && !fast_waddr) begin
latched_waddr = mem_axi_awaddr;
latched_waddr_en = 1;
end
if (mem_axi_wvalid && mem_axi_wready && !fast_wdata) begin
latched_wdata = mem_axi_wdata;
latched_wstrb = mem_axi_wstrb;
latched_wdata_en = 1;
end
if (mem_axi_arvalid && !(latched_raddr_en || fast_raddr) && !delay_axi_transaction[0]) handle_axi_arvalid;
if (mem_axi_awvalid && !(latched_waddr_en || fast_waddr) && !delay_axi_transaction[1]) handle_axi_awvalid;
if (mem_axi_wvalid && !(latched_wdata_en || fast_wdata) && !delay_axi_transaction[2]) handle_axi_wvalid;
if (!mem_axi_rvalid && latched_raddr_en && !delay_axi_transaction[3]) handle_axi_rvalid;
if (!mem_axi_bvalid && latched_waddr_en && latched_wdata_en && !delay_axi_transaction[4]) handle_axi_bvalid;
end
endmodule

86
testbench_ez.v
View File

@ -1,86 +0,0 @@
// This is free and unencumbered software released into the public domain.
//
// Anyone is free to copy, modify, publish, use, compile, sell, or
// distribute this software, either in source code form or as a compiled
// binary, for any purpose, commercial or non-commercial, and by any
// means.
`timescale 1 ns / 1 ps
module testbench;
reg clk = 1;
reg resetn = 0;
wire trap;
always #5 clk = ~clk;
initial begin
if ($test$plusargs("vcd")) begin
$dumpfile("testbench.vcd");
$dumpvars(0, testbench);
end
repeat (100) @(posedge clk);
resetn <= 1;
repeat (1000) @(posedge clk);
$finish;
end
wire mem_valid;
wire mem_instr;
reg mem_ready;
wire [31:0] mem_addr;
wire [31:0] mem_wdata;
wire [3:0] mem_wstrb;
reg [31:0] mem_rdata;
always @(posedge clk) begin
if (mem_valid && mem_ready) begin
if (mem_instr)
$display("ifetch 0x%08x: 0x%08x", mem_addr, mem_rdata);
else if (mem_wstrb)
$display("write 0x%08x: 0x%08x (wstrb=%b)", mem_addr, mem_wdata, mem_wstrb);
else
$display("read 0x%08x: 0x%08x", mem_addr, mem_rdata);
end
end
picorv32 #(
) uut (
.clk (clk ),
.resetn (resetn ),
.trap (trap ),
.mem_valid (mem_valid ),
.mem_instr (mem_instr ),
.mem_ready (mem_ready ),
.mem_addr (mem_addr ),
.mem_wdata (mem_wdata ),
.mem_wstrb (mem_wstrb ),
.mem_rdata (mem_rdata )
);
reg [31:0] memory [0:255];
initial begin
memory[0] = 32'h 3fc00093; // li x1,1020
memory[1] = 32'h 0000a023; // sw x0,0(x1)
memory[2] = 32'h 0000a103; // loop: lw x2,0(x1)
memory[3] = 32'h 00110113; // addi x2,x2,1
memory[4] = 32'h 0020a023; // sw x2,0(x1)
memory[5] = 32'h ff5ff06f; // j <loop>
end
always @(posedge clk) begin
mem_ready <= 0;
if (mem_valid && !mem_ready) begin
if (mem_addr < 1024) begin
mem_ready <= 1;
mem_rdata <= memory[mem_addr >> 2];
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
/* add memory-mapped IO here */
end
end
endmodule