Enable a bunch of PicoRV32 features in PicoSoC

picosoc/Makefile

@@ -36,7 +36,7 @@ hx8kprog_fw: firmware.bin
 # ---- Example Firmware ----
 
 firmware.elf: sections.lds start.s firmware.c
-	riscv32-unknown-elf-gcc -Wl,-Bstatic,-T,sections.lds,--strip-debug -ffreestanding -nostdlib -o firmware.elf start.s firmware.c
+	riscv32-unknown-elf-gcc -march=rv32imc -Wl,-Bstatic,-T,sections.lds,--strip-debug -ffreestanding -nostdlib -o firmware.elf start.s firmware.c
 
 firmware.hex: firmware.elf
 	riscv32-unknown-elf-objcopy -O verilog firmware.elf /dev/stdout | sed -e '1 s/@00000000/@00100000/; 2,65537 d;' > firmware.hex

picosoc/firmware.c

@@ -179,7 +179,7 @@ void cmd_read_flash_regs()
 
 // --------------------------------------------------------
 
-uint32_t cmd_benchmark(bool verbose)
+uint32_t cmd_benchmark(bool verbose, uint32_t *instns_p)
 {
 	uint8_t data[256];
 	uint32_t *words = (void*)data;
@@ -231,6 +231,9 @@ uint32_t cmd_benchmark(bool verbose)
 		putchar('\n');
 	}
 
+	if (instns_p)
+		*instns_p = instns_end - instns_begin;
+
 	return cycles_end - cycles_begin;
 }
 
@@ -238,10 +241,12 @@ uint32_t cmd_benchmark(bool verbose)
 
 void cmd_benchmark_all()
 {
+	uint32_t instns = 0;
+
 	print("default        ");
 	reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00000000;
 	print(": ");
-	print_hex(cmd_benchmark(false), 8);
+	print_hex(cmd_benchmark(false, &instns), 8);
 	putchar('\n');
 
 	for (int i = 8; i > 0; i--)
@@ -254,7 +259,7 @@ void cmd_benchmark_all()
 		reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00400000;
 
 		print(": ");
-		print_hex(cmd_benchmark(false), 8);
+		print_hex(cmd_benchmark(false, &instns), 8);
 		putchar('\n');
 	}
 
@@ -268,7 +273,7 @@ void cmd_benchmark_all()
 		reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00500000;
 
 		print(": ");
-		print_hex(cmd_benchmark(false), 8);
+		print_hex(cmd_benchmark(false, &instns), 8);
 		putchar('\n');
 	}
 
@@ -282,7 +287,7 @@ void cmd_benchmark_all()
 		reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00200000;
 
 		print(": ");
-		print_hex(cmd_benchmark(false), 8);
+		print_hex(cmd_benchmark(false, &instns), 8);
 		putchar('\n');
 	}
 
@@ -296,7 +301,7 @@ void cmd_benchmark_all()
 		reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00300000;
 
 		print(": ");
-		print_hex(cmd_benchmark(false), 8);
+		print_hex(cmd_benchmark(false, &instns), 8);
 		putchar('\n');
 	}
 
@@ -310,7 +315,7 @@ void cmd_benchmark_all()
 		reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00600000;
 
 		print(": ");
-		print_hex(cmd_benchmark(false), 8);
+		print_hex(cmd_benchmark(false, &instns), 8);
 		putchar('\n');
 	}
 
@@ -324,9 +329,13 @@ void cmd_benchmark_all()
 		reg_spictrl = (reg_spictrl & ~0x00700000) | 0x00700000;
 
 		print(": ");
-		print_hex(cmd_benchmark(false), 8);
+		print_hex(cmd_benchmark(false, &instns), 8);
 		putchar('\n');
 	}
+
+	print("instns         : ");
+	print_hex(instns, 8);
+	putchar('\n');
 }
 
 // --------------------------------------------------------
@@ -419,7 +428,7 @@ void main()
 				reg_spictrl = reg_spictrl ^ 0x00100000;
 				break;
 			case '9':
-				cmd_benchmark(true);
+				cmd_benchmark(true, 0);
 				break;
 			case '0':
 				cmd_benchmark_all();

picosoc/hx8kdemo.v

@@ -115,6 +115,10 @@ module hx8kdemo (
 		.flash_io2_di (flash_io2_di),
 		.flash_io3_di (flash_io3_di),
 
+		.irq_5        (1'b0        ),
+		.irq_6        (1'b0        ),
+		.irq_7        (1'b0        ),
+
 		.iomem_valid  (iomem_valid ),
 		.iomem_ready  (iomem_ready ),
 		.iomem_wstrb  (iomem_wstrb ),

picosoc/performance.py

@@ -3,7 +3,7 @@
 import matplotlib.pyplot as plt
 import numpy as np
 
-text = """
+uncompr_text = """
 default        : 010f52ef
 dspi-8         : 008dc82f
 dspi-7         : 008d6d63
@@ -53,32 +53,110 @@ qspi-ddr-crm-4 : 00244a65
 qspi-ddr-crm-3 : 0023ef99
 qspi-ddr-crm-2 : 002394cd
 qspi-ddr-crm-1 : 00233a01
+instns         : 0003df2d
+"""
+
+compr_text = """
+default        : 00f3d36d
+dspi-8         : 008008ad
+dspi-7         : 007fade1
+dspi-6         : 007f5315
+dspi-5         : 007ef849
+dspi-4         : 007e9d7d
+dspi-3         : 007e42b1
+dspi-2         : 007de7e5
+dspi-1         : 007d8d19
+dspi-crm-8     : 007d324d
+dspi-crm-7     : 007cd781
+dspi-crm-6     : 007c7cb5
+dspi-crm-5     : 007c21e9
+dspi-crm-4     : 007bc71d
+dspi-crm-3     : 007b6c51
+dspi-crm-2     : 007b1185
+dspi-crm-1     : 007ab6b9
+qspi-8         : 00434ced
+qspi-7         : 0042f221
+qspi-6         : 00429755
+qspi-5         : 00423c89
+qspi-4         : 0041e1bd
+qspi-3         : 004186f1
+qspi-2         : 00412c25
+qspi-1         : 0040d159
+qspi-crm-8     : 0040768d
+qspi-crm-7     : 00401bc1
+qspi-crm-6     : 003fc0f5
+qspi-crm-5     : 003f6629
+qspi-crm-4     : 003f0b5d
+qspi-crm-3     : 003eb091
+qspi-crm-2     : 003e55c5
+qspi-crm-1     : 003dfaf9
+qspi-ddr-8     : 00255d87
+qspi-ddr-7     : 002502bb
+qspi-ddr-6     : 0024a7ef
+qspi-ddr-5     : 00244d23
+qspi-ddr-4     : 0023f257
+qspi-ddr-3     : 0023978b
+qspi-ddr-2     : 00233cbf
+qspi-ddr-1     : 0022e1f3
+qspi-ddr-crm-8 : 00228727
+qspi-ddr-crm-7 : 00222c5b
+qspi-ddr-crm-6 : 0021d18f
+qspi-ddr-crm-5 : 002176c3
+qspi-ddr-crm-4 : 00211bf7
+qspi-ddr-crm-3 : 0020c12b
+qspi-ddr-crm-2 : 0020665f
+qspi-ddr-crm-1 : 00200b93
+instns         : 0003df2d
 """
 
 labels = list()
-values = list()
+uncompr_values = list()
+compr_values = list()
 
-for line in text.split("\n"):
+for line in uncompr_text.split("\n"):
     if line != "":
         line = line.split()
+        if line[0] == "instns":
+            for i in range(len(uncompr_values)):
+                uncompr_values[i] = int(line[2], 16) / uncompr_values[i]
+        else:
             labels.append(line[0])
-        values.append(int(line[2], 16))
+            uncompr_values.append(int(line[2], 16))
+
+for line in compr_text.split("\n"):
+    if line != "":
+        line = line.split()
+        if line[0] == "instns":
+            for i in range(len(compr_values)):
+                compr_values[i] = int(line[2], 16) / compr_values[i]
+        else:
+            compr_values.append(int(line[2], 16))
+
+print(np.array(compr_values) / np.array(uncompr_values))
+
+values = list()
+for i in range(len(compr_values)):
+    values.append(uncompr_values[i] / uncompr_values[0])
+    # values.append(compr_values[i] / compr_values[0])
+
+values = np.array(values)
+print(values)
 
 plt.figure(figsize=(10, 5))
 plt.title("Performance comparison for different PicoSoC SPI flash configurations")
-plt.plot(range(len(labels)), values[0] / np.array(values))
+plt.plot(range(len(labels)), values)
 plt.xticks(range(len(labels)), labels, rotation=80)
 
 for color, x1, x2 in [["black", 0, 0], ["red", 1, 8], ["green", 9, 16],
         ["red", 17, 24], ["green", 25, 32], ["red", 33, 40], ["green", 41, 48]]:
     for t in plt.axes().xaxis.get_ticklabels()[x1:x2+1]:
         t.set_color(color)
-    plt.plot([x1, x1], [0, values[0] / values[x1] - 0.2], color=color)
+    plt.plot([x1, x1], [0, values[x1] - 0.2], color=color)
-    plt.plot([x2, x2], [0, values[0] / values[x2] - 0.2], color=color)  
+    plt.plot([x2, x2], [0, values[x2] - 0.2], color=color)
-    plt.plot([x1], [values[0] / values[x1]], "k.")
+    plt.plot([x1], [values[x1]], "k.")
-    plt.plot([x2], [values[0] / values[x2]], "k.")
+    plt.plot([x2], [values[x2]], "k.")
 
-plt.xlim(-1, len(values))
+plt.xlim(-1, len(labels))
 plt.ylim(0, 9)
 plt.grid()
 

picosoc/picosoc.v

@@ -28,6 +28,10 @@ module picosoc (
 	output [31:0] iomem_wdata,
 	input  [31:0] iomem_rdata,
 
+	input  irq_5,
+	input  irq_6,
+	input  irq_7,
+
 	output ser_tx,
 	input  ser_rx,
 
@@ -53,6 +57,19 @@ module picosoc (
 	parameter [31:0] STACKADDR = (4*MEM_WORDS);       // end of memory
 	parameter [31:0] PROGADDR_RESET = 32'h 0010_0000; // 1 MB into flash
 
+	reg [31:0] irq;
+	wire irq_stall = 0;
+	wire irq_uart = 0;
+
+	always @* begin
+		irq = 0;
+		irq[3] = irq_stall;
+		irq[4] = irq_uart;
+		irq[5] = irq_5;
+		irq[6] = irq_6;
+		irq[7] = irq_7;
+	end
+
 	wire mem_valid;
 	wire mem_instr;
 	wire mem_ready;
@@ -91,7 +108,14 @@ module picosoc (
 
 	picorv32 #(
 		.STACKADDR(STACKADDR),
-		.PROGADDR_RESET(PROGADDR_RESET)
+		.PROGADDR_RESET(PROGADDR_RESET),
+		.PROGADDR_IRQ(32'h 0000_0000),
+		.BARREL_SHIFTER(1),
+		.COMPRESSED_ISA(1),
+		.ENABLE_MUL(1),
+		.ENABLE_DIV(1),
+		.ENABLE_IRQ(1),
+		.ENABLE_IRQ_QREGS(0)
 	) cpu (
 		.clk         (clk        ),
 		.resetn      (resetn     ),
@@ -101,7 +125,8 @@ module picosoc (
 		.mem_addr    (mem_addr   ),
 		.mem_wdata   (mem_wdata  ),
 		.mem_wstrb   (mem_wstrb  ),
-		.mem_rdata   (mem_rdata  )
+		.mem_rdata   (mem_rdata  ),
+		.irq         (irq        )
 	);
 
 	spimemio spimemio (