Build system updates for Windows

c/Makefile.msys

@@ -0,0 +1,22 @@
+CC=/opt/riscv/bin/riscv32-unknown-elf-gcc.exe
+AS=/opt/riscv/bin/riscv32-unknown-elf-as.exe
+LD=/opt/riscv/bin/riscv32-unknown-elf-ld.exe
+COPTS= -Wall -pedantic 
+
+all : test
+	./gen_mem_msys.sh test
+	rm setup.o test.o
+
+test : test.o setup.o
+	echo "---------------------------------------------------------" >> /dev/null
+	echo "-- Do not call anything main() - it will end up linked at" >> /dev/null
+	echo "-- the start of the program, rather than the setup code"   >> /dev/null
+	echo "---------------------------------------------------------" >> /dev/null
+	${LD} -Ttext 0xF0000000 -Tdata 0x10000000 -T linker_script setup.o test.o -o test
+
+
+setup.o : setup.s
+	$(AS) -o setup.o --march=rv32i setup.s 
+
+test.o : test.c
+	$(CC) -c test.c $(COPTS)

c/gen_mem_msys.sh

@@ -0,0 +1,84 @@
+#!/bin/bash
+###############################################################################
+# gen_mem.sh - script to generate HDL memory files
+#
+# Part of the Rudi-RV32I project
+#
+# See https://github.com/hamsternz/Rudi-RV32I
+# 
+# MIT License
+#
+###############################################################################
+#
+# Copyright (c) 2020 Mike Field
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+# 
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# 
+###############################################################################
+OBJCOPY=/opt/riscv/bin/riscv32-unknown-elf-objcopy
+
+if [ ! -f "$1" ]
+then
+   echo No file name given
+   exit
+fi
+
+$OBJCOPY $1 /dev/null --dump-section .data=data.section.$$ --dump-section .text=text.section.$$
+
+if [ ! -f data.section.$$ -o ! -f text.section.$$ ]
+then
+   echo Unable to dump sections
+   exit 
+fi
+
+(
+    #############################
+    ##### Output file header
+    #############################
+    grep ^H: template_program_memory.vhd | cut -c 3- 
+
+    #############################
+    ##### Output Program data
+    #############################
+    cat text.section.$$ | od -An -w4 -v -tx4 | awk '{ print "         " NR-1 " => x\"" $1 "\"," }'
+
+    #############################
+    ##### Output file footer
+    #############################
+    grep ^F: template_program_memory.vhd | cut -c 3- 
+) > ../src/program_memory/program_memory_$1.vhd
+
+(
+    #############################
+    ##### Output file header
+    #############################
+    grep ^H: template_ram_memory.vhd | cut -c 3- 
+
+    #############################
+    ##### Output Program data
+    #############################
+    cat data.section.$$ | od -An -w4 -v -tx4 | awk '{ print "         " NR-1 " => x\"" $1 "\"," }'
+
+    #############################
+    ##### Output file footer
+    #############################
+    grep ^F: template_ram_memory.vhd | cut -c 3- 
+) > ../src/program_memory/ram_memory_$1.vhd
+
+rm data.section.$$ text.section.$$

c/setup.s

@@ -35,11 +35,11 @@
 	.align	2
 	.globl	_start
 	.type	_start, @function
-        .org    0
+	.org	0
 _start:
 	lui	a1,0x10001
-        # Set the stack address to 0x10000FFC
+	# Set the stack address to 0x10000FFC
 	addi	sp, a1, -4
-        # Call the main function
-        jal     ra, test_program
-        j       _start 
+	# Call the main function
+	jal	ra, test_program
+	j	_start