seminaries/qtrvsim/qtrvsim-semstart: copy from QtRVSim

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

seminaries/qtrvsim/qtrvsim-semstart/.gitignore

+*.o
+depend
+simple-lw-sw

seminaries/qtrvsim/qtrvsim-semstart/Makefile

+ARCH=riscv64-unknown-elf
+
+SOURCES = simple-lw-sw.S
+TARGET_EXE = simple-lw-sw
+
+LDFLAGS += -Wl,-Ttext,0x200 -Wl,-Tdata,0x400
+
+
+CC=$(ARCH)-gcc
+CXX=$(ARCH)-g++
+AS=$(ARCH)-as
+LD=$(ARCH)-ld
+OBJCOPY=$(ARCH)-objcopy
+
+ARCHFLAGS += -mabi=ilp32
+ARCHFLAGS += -march=rv32i
+ARCHFLAGS += -fno-lto
+
+CFLAGS  += -ggdb -Os -Wall
+CXXFLAGS+= -ggdb -Os -Wall
+AFLAGS  += -ggdb
+LDFLAGS += -ggdb
+LDFLAGS += -nostartfiles
+LDFLAGS += -nostdlib
+LDFLAGS += -static
+#LDFLAGS += -specs=/opt/musl/riscv64-linux-gnu/lib/musl-gcc.specs
+
+CFLAGS  += $(ARCHFLAGS)
+CXXFLAGS+= $(ARCHFLAGS)
+AFLAGS  += $(ARCHFLAGS)
+LDFLAGS += $(ARCHFLAGS)
+
+OBJECTS += $(filter %.o,$(SOURCES:%.S=%.o))
+OBJECTS += $(filter %.o,$(SOURCES:%.c=%.o))
+OBJECTS += $(filter %.o,$(SOURCES:%.cpp=%.o))
+
+all : default
+
+.PHONY : default clean dep all
+
+%.o:%.S
+	$(CC) -D__ASSEMBLY__ $(AFLAGS) -c $< -o $@
+
+%.o:%.c
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
+
+%.o:%.cpp
+	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -c $<
+
+%.s:%.c
+	$(CC) $(CFLAGS) $(CPPFLAGS) -S $< -o $@
+
+default : $(TARGET_EXE)
+
+$(TARGET_EXE) : $(OBJECTS)
+	$(CC) $(LDFLAGS) $^ -o $@
+
+dep: depend
+
+depend: $(SOURCES) $(glob *.h)
+	echo '# autogenerated dependencies' > depend
+ifneq ($(filter %.S,$(SOURCES)),)
+	$(CC)  -D__ASSEMBLY__ $(AFLAGS) -w -E -M $(filter %.S,$(SOURCES)) \
+	  >> depend
+endif
+ifneq ($(filter %.c,$(SOURCES)),)
+	$(CC) $(CFLAGS) $(CPPFLAGS) -w -E -M $(filter %.c,$(SOURCES)) \
+	  >> depend
+endif
+ifneq ($(filter %.cpp,$(SOURCES)),)
+	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -w -E -M $(filter %.cpp,$(SOURCES)) \
+	  >> depend
+endif
+
+clean:
+	rm -f *.o *.a $(OBJECTS) $(TARGET_EXE) depend
+
+#mips-elf-objdump --source -M no-aliases,reg-names=numeric qtmips_binrep
+
+-include depend

seminaries/qtrvsim/qtrvsim-semstart/simple-lw-sw.S

+//  Template file with simple memory example
+//  QtRVSim simulator https://github.com/cvut/qtrvsim/
+//
+//  template-os.S       - example file
+//
+//  (C) 2021 by Pavel Pisa
+//      e-mail:   pisa@cmp.felk.cvut.cz
+//      homepage: http://cmp.felk.cvut.cz/~pisa
+//      work:     http://www.pikron.com/
+//      license:  public domain
+
+// Directives to make interesting windows visible
+#pragma qtrvsim show registers
+#pragma qtrvsim show memory
+
+.globl _start
+.option norelax
+
+.text
+
+_start:
+loop:
+	// load the word from absolute address
+	lw     x2, 0x400(x0)
+	// store the word to absolute address
+	sw     x2, 0x404(x0)
+
+	// stop execution wait for debugger/user
+	// ebreak
+	// ensure that continuation does not
+	// interpret random data
+	beq    x0, x0, loop
+	nop
+	nop
+	ebreak
+
+.data
+.org 0x400
+
+src_val:
+	.word  0x12345678
+dst_val:
+	.word  0
+
+// Specify location to show in memory window
+#pragma qtrvsim focus memory src_val