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Add flash-spoof mode to make large management-core programs run faster #7

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Add flash-spoof mode to make large management-core programs run faster #7

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5 changes: 4 additions & 1 deletion verilog/dv/caravel/user_proj_example/io_ports/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,8 @@ GCC_PATH?=/ef/apps/bin
GCC_PREFIX?=riscv32-unknown-elf
PDK_PATH?=/ef/tech/SW/sky130A

SPOOF_FAST_FLASH=

.SUFFIXES:

PATTERN = io_ports
Expand All @@ -15,8 +17,9 @@ all: ${PATTERN:=.vcd}

hex: ${PATTERN:=.hex}

spoof_var := $(if $(SPOOF_FAST_FLASH),-DSPOOF_FAST_FLASH=\"$(PATTERN).hex\",)
%.vvp: %_tb.v %.hex
iverilog -DFUNCTIONAL -I $(BEHAVIOURAL_MODELS) \
iverilog $(spoof_var) -DFUNCTIONAL -I $(BEHAVIOURAL_MODELS) \
-I $(PDK_PATH) -I $(IP_PATH) -I $(RTL_PATH) \
-o $@ $<

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5 changes: 4 additions & 1 deletion verilog/dv/caravel/user_proj_example/la_test1/Makefile
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Expand Up @@ -7,6 +7,8 @@ GCC_PATH?=/ef/apps/bin
GCC_PREFIX?=riscv32-unknown-elf
PDK_PATH?=/ef/tech/SW/sky130A

SPOOF_FAST_FLASH=

.SUFFIXES:

PATTERN = la_test1
Expand All @@ -15,8 +17,9 @@ all: ${PATTERN:=.vcd}

hex: ${PATTERN:=.hex}

spoof_var := $(if $(SPOOF_FAST_FLASH),-DSPOOF_FAST_FLASH=\"$(PATTERN).hex\",)
%.vvp: %_tb.v %.hex
iverilog -DFUNCTIONAL -I $(BEHAVIOURAL_MODELS) \
iverilog $(spoof_var) -DFUNCTIONAL -I $(BEHAVIOURAL_MODELS) \
-I $(PDK_PATH) -I $(IP_PATH) -I $(RTL_PATH) \
-o $@ $<

Expand Down
5 changes: 4 additions & 1 deletion verilog/dv/caravel/user_proj_example/la_test2/Makefile
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Expand Up @@ -7,6 +7,8 @@ GCC_PATH?=/ef/apps/bin
GCC_PREFIX?=riscv32-unknown-elf
PDK_PATH?=/ef/tech/SW/sky130A

SPOOF_FAST_FLASH=

.SUFFIXES:

PATTERN = la_test2
Expand All @@ -15,8 +17,9 @@ all: ${PATTERN:=.vcd}

hex: ${PATTERN:=.hex}

spoof_var := $(if $(SPOOF_FAST_FLASH),-DSPOOF_FAST_FLASH=\"$(PATTERN).hex\",)
%.vvp: %_tb.v %.hex
iverilog -DFUNCTIONAL -I $(BEHAVIOURAL_MODELS) \
iverilog $(spoof_var) -DFUNCTIONAL -I $(BEHAVIOURAL_MODELS) \
-I $(PDK_PATH) -I $(IP_PATH) -I $(RTL_PATH) \
-o $@ $<

Expand Down
64 changes: 64 additions & 0 deletions verilog/rtl/spimemio.v
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Expand Up @@ -73,6 +73,69 @@ module spimemio_wb (
input flash_io3_di

);

`ifdef SPOOF_FAST_FLASH
assign wb_cfg_ack_o = 0;
assign wb_cfg_dat_o = 0;

assign pass_thru_sdo = 0;
assign flash_csb = 0;
assign flash_clk = 0;
assign flash_csb_oeb = 0;
assign flash_clk_oeb = 0;
assign flash_io0_oeb = 0;
assign flash_io1_oeb = 0;
assign flash_io2_oeb = 0;
assign flash_io3_oeb = 0;
assign flash_csb_ieb = 0;
assign flash_clk_ieb = 0;
assign flash_io0_ieb = 0;
assign flash_io1_ieb = 0;
assign flash_io2_ieb = 0;
assign flash_io3_ieb = 0;
assign flash_io0_do = 0;
assign flash_io1_do = 0;
assign flash_io2_do = 0;
assign flash_io3_do = 0;

// 16 MB (128Mb) Flash
reg [7:0] memory [0:16*1024*1024-1];

reg ack_reg;
reg [31:0] dat_reg;

assign wb_flash_ack_o = ack_reg;
assign wb_flash_dat_o = dat_reg;

wire [31:0] adr = {7'b0, wb_adr_i[23:0]};

initial begin
$display("============================================================");
$display("Spoofing flash from file %s", `SPOOF_FAST_FLASH);
$display("Warning: this is experimental and \ndoes not match exact hardware behavior");
$display("(assumes that flash base is a multiple of 0x1000000)");
$display("============================================================");
$readmemh(`SPOOF_FAST_FLASH, memory);
end

always @(posedge wb_clk_i) begin
if (wb_cyc_i & wb_cfg_stb_i) $error("wb_cfg_stb_i unsupported in SPOOF_FAST_FLASH mode. Please use normal flash emulation.");
if (pass_thru) $error("pass_thru unsupported in SPOOF_FAST_FLASH mode. Please use normal flash emulation.");

ack_reg <= 0;

if (wb_cyc_i & wb_flash_stb_i & ~wb_flash_ack_o) begin
ack_reg <= 1;
dat_reg <= {memory[adr+3], memory[adr+2], memory[adr+1], memory[adr+0]};

if (wb_we_i & wb_sel_i[0]) memory[adr+0] <= wb_dat_i[7:0];
if (wb_we_i & wb_sel_i[1]) memory[adr+1] <= wb_dat_i[15:8];
if (wb_we_i & wb_sel_i[2]) memory[adr+2] <= wb_dat_i[23:16];
if (wb_we_i & wb_sel_i[3]) memory[adr+3] <= wb_dat_i[31:24];
end
end

`else
wire spimem_ready;
wire [23:0] mem_addr;
wire [31:0] spimem_rdata;
Expand Down Expand Up @@ -141,6 +204,7 @@ module spimemio_wb (
.pass_thru_sdi(pass_thru_sdi),
.pass_thru_sdo(pass_thru_sdo)
);
`endif

endmodule

Expand Down