murax xip flash integration wip

scripts/Murax/iCE40-hx8k_breakout_board_xip/Makefile

@@ -0,0 +1,38 @@
+
+
+VERILOG = ../../../Murax.v toplevel.v
+
+generate :
+	#(cd ../../..; sbt "run-main vexriscv.demo.MuraxWithXip")
+
+../../../Murax.v :
+	#(cd ../../..; sbt "run-main vexriscv.demo.MuraxWithXip")
+
+../../../Murax.v*.bin:
+
+bin/toplevel.blif : ${VERILOG} ../../../Murax.v*.bin
+	mkdir -p bin
+	rm -f Murax.v*.bin
+	cp ../../../Murax.v*.bin . | true
+	yosys -v3 -p "synth_ice40 -top toplevel -blif bin/toplevel.blif" ${VERILOG}
+
+bin/toplevel.asc : toplevel.pcf bin/toplevel.blif
+	arachne-pnr -p toplevel.pcf -d 8k --max-passes 600 -P ct256 bin/toplevel.blif -o bin/toplevel.asc
+
+bin/toplevel.bin : bin/toplevel.asc
+	icepack bin/toplevel.asc bin/toplevel.bin
+
+compile : bin/toplevel.bin
+
+time: bin/toplevel.bin
+	icetime -tmd hx8k bin/toplevel.asc
+
+prog : bin/toplevel.bin
+	iceprog -S bin/toplevel.bin
+
+sudo-prog : bin/toplevel.bin
+	sudo iceprog -S bin/toplevel.bin
+
+clean :
+	rm -rf bin
+	rm -f Murax.v*.bin

scripts/Murax/iCE40-hx8k_breakout_board_xip/README.md

@@ -0,0 +1,84 @@
+This example is for the
+[Lattice iCE40HX-8K Breakout Board](http://www.latticesemi.com/Products/DevelopmentBoardsAndKits/iCE40HX8KBreakoutBoard.aspx).
+
+An image of this board is shown below;
+![img/iCE40HX8K-breakout-revA.png]
+
+This board can be purchased for ~$USD 49 directly from Lattice and is supported
+by the IceStorm
+[`iceprog`](https://github.com/cliffordwolf/icestorm/tree/master/iceprog) tool.
+
+
+# Using the example
+
+## Before Starting
+
+Before starting make sure that your board is configured for `CRAM Programming`
+mode. This requires removing jumper `J7` and putting the pair of jumpers on
+`J6` to be parallel to the text on the board.
+
+This is shown in **Figure 5** of the
+[iCE40HX-8K Breakout Board User Guide](http://www.latticesemi.com/view_document?document_id=50373).
+which is also reproduced below;
+![img/cram-programming-config.png]
+
+Once your board is ready, you should follow the setup instructions at the
+[top level](../../../README.md).
+
+You should make sure you have the following tools installed;
+ * Yosys
+ * arachne-pnr
+ * icestorm tools (like icepack and iceprog)
+ * riscv toolchain
+ * sbt
+
+## Building
+
+You should be able to just type `make compile` and get output similar to this;
+```
+...
+  place time 10.14s
+route...
+  pass 1, 15 shared.
+  pass 2, 4 shared.
+  pass 3, 1 shared.
+  pass 4, 0 shared.
+
+After routing:
+span_4     4406 / 29696
+span_12    951 / 5632
+
+  route time 9.12s
+write_txt bin/toplevel.asc...
+icepack bin/toplevel.asc bin/toplevel.bin
+```
+
+The process should take around 30 seconds on a reasonable fast computer.
+
+## Programming
+
+After building you should be able to run `make prog`. You may need to run `make
+sudo-prog` if root is needed to access your USB devices.
+
+You should get output like the following;
+```
+iceprog -S bin/toplevel.bin
+init..
+cdone: high
+reset..
+cdone: low
+programming..
+cdone: high
+Bye.
+```
+
+After programming the LEDs at the top of the board should start flashing in an
+interesting pattern.
+
+## Connect
+
+After programming you should be able to connect to the serial port and have the
+output echoed back to you.
+
+On Linux you can do this using a command like `screen /dev/ttyUSB1`. Then as
+you type you should get back the same characters.

scripts/Murax/iCE40-hx8k_breakout_board_xip/toplevel.pcf

@@ -0,0 +1,23 @@
+## iCE40-hx8k breakout board
+
+set_io io_J3  J3
+set_io io_H16 H16
+set_io io_G15 G15
+set_io io_G16 G16
+set_io io_F15 F15
+set_io io_B12 B12
+set_io io_B10 B10
+set_io io_led[0] B5
+set_io io_led[1] B4
+set_io io_led[2] A2
+set_io io_led[3] A1
+set_io io_led[4] C5
+set_io io_led[5] C4
+set_io io_led[6] B3
+set_io io_led[7] C3
+
+#XIP
+set_io io_P12 P12
+set_io io_P11 P11
+set_io io_R11 R11
+set_io io_R12 R12

scripts/Murax/iCE40-hx8k_breakout_board_xip/toplevel.v

@@ -0,0 +1,76 @@
+`timescale 1ns / 1ps
+
+module toplevel(
+    input   io_J3,
+    input   io_H16,
+    input   io_G15,
+    output  io_G16,
+    input   io_F15,
+    output  io_B12,
+    input   io_B10,
+
+    input  io_P12,
+    output  io_P11,
+    output  io_R11,
+    output  io_R12,
+
+    output [7:0] io_led
+
+  );
+  
+  wire [31:0] io_gpioA_read;
+  wire [31:0] io_gpioA_write;
+  wire [31:0] io_gpioA_writeEnable;
+  wire io_mainClk;
+  wire io_jtag_tck;
+
+  SB_GB mainClkBuffer (
+    .USER_SIGNAL_TO_GLOBAL_BUFFER (io_J3),
+    .GLOBAL_BUFFER_OUTPUT ( io_mainClk)
+  );
+
+  SB_GB jtagClkBuffer (
+    .USER_SIGNAL_TO_GLOBAL_BUFFER (io_H16),
+    .GLOBAL_BUFFER_OUTPUT ( io_jtag_tck)
+  );
+
+  assign io_led = io_gpioA_write[7 : 0];
+
+
+  wire [1:0] io_xpi_sclk_write;
+  wire  io_xpi_data_0_writeEnable;
+  wire [1:0] io_xpi_data_0_read;
+  wire [1:0] io_xpi_data_0_write;
+  wire  io_xpi_data_1_writeEnable;
+  wire [1:0] io_xpi_data_1_read;
+  wire [1:0] io_xpi_data_1_write;
+  wire [0:0] io_xpi_ss;
+
+  assign io_P11 = io_xpi_data_0_write[0];
+  assign io_xpi_data_1_read[0] = io_P12;
+  assign io_xpi_data_1_read[1] = io_P12;
+  assign io_R11 = io_xpi_sclk_write[0];
+  assign io_R12 = io_xpi_ss[0];
+
+  Murax murax ( 
+    .io_asyncReset(0),
+    .io_mainClk (io_mainClk ),
+    .io_jtag_tck(io_jtag_tck),
+    .io_jtag_tdi(io_G15),
+    .io_jtag_tdo(io_G16),
+    .io_jtag_tms(io_F15),
+    .io_gpioA_read       (io_gpioA_read),
+    .io_gpioA_write      (io_gpioA_write),
+    .io_gpioA_writeEnable(io_gpioA_writeEnable),
+    .io_uart_txd(io_B12),
+    .io_uart_rxd(io_B10),
+    .io_xpi_sclk_write(io_xpi_sclk_write),
+    .io_xpi_data_0_writeEnable(io_xpi_data_0_writeEnable),
+    .io_xpi_data_0_read(io_xpi_data_0_read),
+    .io_xpi_data_0_write(io_xpi_data_0_write),
+    .io_xpi_data_1_writeEnable(io_xpi_data_1_writeEnable),
+    .io_xpi_data_1_read(io_xpi_data_1_read),
+    .io_xpi_data_1_write(io_xpi_data_1_write),
+    .io_xpi_ss(io_xpi_ss)
+  );		
+endmodule

src/main/scala/vexriscv/demo/Murax.scala

@@ -45,7 +45,7 @@ case class MuraxConfig(coreFrequency : HertzNumber,
   val genXpi = xipConfig != null
 
   def addXip(): MuraxConfig = copy(xipConfig = SpiDdrMasterCtrl.MemoryMappingParameters(
-    SpiDdrMasterCtrl.Parameters(8, 12, SpiDdrParameter(4, 1)).addAllMods(),
+    SpiDdrMasterCtrl.Parameters(8, 12, SpiDdrParameter(2, 1)).addAllMods(),
     cmdFifoDepth = 32,
     rspFifoDepth = 32,
     xip = SpiDdrMasterCtrl.XipBusParameters(addressWidth = 24, dataWidth = 32)

src/test/scala/vexriscv/MuraxSim.scala

@@ -20,8 +20,8 @@ import scala.collection.mutable
 object MuraxSim {
   def main(args: Array[String]): Unit = {
 //    def config = MuraxConfig.default.copy(onChipRamSize = 256 kB)
-    def config = MuraxConfig.default.copy(onChipRamSize = 4 kB, onChipRamHexFile = "src/main/ressource/hex/muraxDemo.hex")
-
+    def config = MuraxConfig.default.copy(onChipRamSize = 4 kB, onChipRamHexFile = "src/main/ressource/hex/muraxDemo.hex").addXip()
+    val simSlowDown = true
     SimConfig.allOptimisation.withWave.compile(new Murax(config)).doSimUntilVoid{dut =>
       val mainClkPeriod = (1e12/dut.config.coreFrequency.toDouble).toLong
       val jtagClkPeriod = mainClkPeriod*4
@@ -47,6 +47,7 @@ object MuraxSim {
         baudPeriod = uartBaudPeriod
       )
 
+      if(config.xipConfig != null)dut.io.xpi.data(1).read #= 0
 
       val guiThread = fork{
         val guiToSim = mutable.Queue[Any]()
@@ -101,6 +102,7 @@ object MuraxSim {
           dut.io.gpioA.read #= (dut.io.gpioA.write.toLong & dut.io.gpioA.writeEnable.toLong) | (switchValue() << 8)
           ledsValue = dut.io.gpioA.write.toLong
           ledsFrame.repaint()
+          if(simSlowDown) Thread.sleep(400)
         }
       }
     }