picosoc: Add arty35 and arty100 boards

Signed-off-by: Tomasz Michalak <tmichalak@antmicro.com>

xc7/picosoc_demo/Makefile

@@ -1,8 +1,7 @@
 mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
 current_dir := $(patsubst %/,%,$(dir $(mkfile_path)))
-TOP := basys3_demo
-VERILOG := ${current_dir}/basys3_demo_no_roi.v \
-           ${current_dir}/picosoc_noflash.v \
+TOP := top
+VERILOG := ${current_dir}/picosoc_noflash.v \
            ${current_dir}/picorv32.v \
            ${current_dir}/simpleuart.v \
            ${current_dir}/progmem.v
@@ -10,9 +9,27 @@ PARTNAME := xc7a35tcpg236-1
 DEVICE  := xc7a50t_test
 BITSTREAM_DEVICE := artix7
 PCF := ${current_dir}/basys3.pcf
-SDC := ${current_dir}/basys3.sdc
+SDC := ${current_dir}/picosoc.sdc
 BUILDDIR := build
 
+ifeq ($(TARGET),arty_35)
+  VERILOG += ${current_dir}/arty.v
+  PARTNAME := xc7a35tcsg324-1
+  PCF :=${current_dir}/arty.pcf
+  BOARD_BUILDDIR := ${BUILDDIR}/arty_35
+else ifeq ($(TARGET),arty_100)
+  VERILOG += ${current_dir}/arty.v
+  PARTNAME := xc7a100tcsg324-1
+  PCF:=${current_dir}/arty.pcf
+  DEVICE := xc7a100t_test
+  BOARD_BUILDDIR := ${BUILDDIR}/arty_100
+else
+  VERILOG += ${current_dir}/basys3.v
+  PARTNAME := xc7a35tcpg236-1
+  PCF := ${current_dir}/basys3.pcf
+  BOARD_BUILDDIR := ${BUILDDIR}/basys3
+endif
+
 all: ${BUILDDIR}/${TOP}.bit
 
 ${BUILDDIR}:

xc7/picosoc_demo/arty.pcf

@@ -0,0 +1,12 @@
+# 100 MHz CLK
+set_io clk E3
+
+# UART
+set_io rx A9
+set_io tx D10
+
+# LEDs
+set_io led[0] H5
+set_io led[1] J5
+set_io led[2] T9
+set_io led[3] T10

xc7/picosoc_demo/arty.v

@@ -0,0 +1,86 @@
+/*
+ *  PicoSoC - A simple example SoC using PicoRV32
+ *
+ *  Copyright (C) 2017  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+module top (
+	input clk,
+
+	output tx,
+	input rx,
+
+    	input [3:0] sw,
+	output [3:0] led
+);
+
+	wire clk_bufg;
+	BUFG bufg (.I(clk), .O(clk_bufg));
+
+	reg [5:0] reset_cnt = 0;
+	wire resetn = &reset_cnt;
+
+	always @(posedge clk_bufg) begin
+		reset_cnt <= reset_cnt + !resetn;
+	end
+
+	wire        iomem_valid;
+	reg         iomem_ready;
+	wire [3:0]  iomem_wstrb;
+	wire [31:0] iomem_addr;
+	wire [31:0] iomem_wdata;
+	reg  [31:0] iomem_rdata;
+
+	reg [31:0] gpio;
+
+	assign led = gpio[3:0];
+
+	always @(posedge clk_bufg) begin
+		if (!resetn) begin
+			gpio <= 0;
+		end else begin
+			iomem_ready <= 0;
+			if (iomem_valid && !iomem_ready && iomem_addr[31:24] == 8'h 03) begin
+				iomem_ready <= 1;
+				iomem_rdata <= {4{sw, gpio[3:0]}};
+				if (iomem_wstrb[0]) gpio[ 7: 0] <= iomem_wdata[ 7: 0];
+				if (iomem_wstrb[1]) gpio[15: 8] <= iomem_wdata[15: 8];
+				if (iomem_wstrb[2]) gpio[23:16] <= iomem_wdata[23:16];
+				if (iomem_wstrb[3]) gpio[31:24] <= iomem_wdata[31:24];
+			end
+		end
+	end
+
+	picosoc_noflash soc (
+		.clk          (clk_bufg),
+		.resetn       (resetn      ),
+
+		.ser_tx       (tx),
+		.ser_rx       (rx),
+
+		.irq_5        (1'b0        ),
+		.irq_6        (1'b0        ),
+		.irq_7        (1'b0        ),
+
+		.iomem_valid  (iomem_valid ),
+		.iomem_ready  (iomem_ready ),
+		.iomem_wstrb  (iomem_wstrb ),
+		.iomem_addr   (iomem_addr  ),
+		.iomem_wdata  (iomem_wdata ),
+		.iomem_rdata  (iomem_rdata )
+	);
+
+endmodule

xc7/picosoc_demo/basys3.v

@@ -17,7 +17,7 @@
  *
  */
 
-module basys3_demo (
+module top (
 	input clk,
 
 	output tx,