created SD_CARD branch meant to experiment with SD-card routines in BaS_gcc

BaS_gcc/Makefile

@@ -0,0 +1,117 @@
+#
+# Makefile for Firebee BaS
+#
+# This Makefile is meant for cross compiling the BaS with Vincent Riviere's cross compilers.
+# If you want to compile native on an Atari (you will need at least GCC 4.6.3), set
+# TCPREFIX to be empty.
+# If you want to compile with the m68k-elf- toolchain, set TCPREFIX accordingly. Requires an extra
+# installation, but allows source level debugging over BDM with a recent gdb (tested with 7.5),
+# the m68k BDM tools from sourceforge (http://bdm.sourceforge.net) and a BDM pod (TBLCF and P&E tested).
+
+# can be either "Y" or "N" (without quotes). "Y" for using the m68k-elf-, "N" for using the m68k-atari-mint
+# toolchain
+COMPILE_ELF=Y
+
+ifeq (Y,$(COMPILE_ELF))
+TCPREFIX=m68k-elf-
+EXE=elf
+FORMAT=elf32-m68k
+else 
+TCPREFIX=m68k-atari-mint-
+EXE=s19
+FORMAT=srec
+endif
+
+CC=$(TCPREFIX)gcc
+LD=$(TCPREFIX)ld
+CPP=$(TCPREFIX)cpp
+OBJCOPY=$(TCPREFIX)objcopy
+
+INCLUDE=-Iinclude
+CFLAGS=-mcpu=5474\
+	   -Wall\
+	   -g\
+	   -Wno-multichar\
+	   -Os\
+	   -fomit-frame-pointer\
+	   -fno-strict-aliasing\
+	   -ffreestanding\
+	   -fleading-underscore\
+	   -Wa,--register-prefix-optional
+
+SRCDIR=sources
+OBJDIR=objs
+
+MAPFILE=bas.map
+
+# Linker control file. The final $(LDCFILE) is intermediate only (preprocessed  version of $(LDCSRC)
+LDCFILE=bas.lk
+LDCSRC=bas.lk.in
+
+# this Makefile can create the BaS to flash or an arbitrary ram address (for BDM debugging). See
+# below for the definition of TARGET_ADDRESS
+FLASH_EXEC=bas.$(EXE)
+RAM_EXEC=ram.$(EXE)
+
+CSRCS= \
+	$(SRCDIR)/sysinit.c \
+	$(SRCDIR)/init_fpga.c \
+	$(SRCDIR)/bas_printf.c \
+	$(SRCDIR)/BaS.c \
+	$(SRCDIR)/cache.c \
+	$(SRCDIR)/sd_card.c
+
+ASRCS= \
+	$(SRCDIR)/startcf.S \
+	$(SRCDIR)/printf_helper.S \
+	$(SRCDIR)/mmu.S \
+	$(SRCDIR)/sd_card_asm.S \
+	$(SRCDIR)/exceptions.S \
+	$(SRCDIR)/supervisor.S \
+	$(SRCDIR)/ewf.S \
+	$(SRCDIR)/illegal_instruction.S 
+
+COBJS=$(patsubst $(SRCDIR)/%.o,$(OBJDIR)/%.o,$(patsubst %.c,%.o,$(CSRCS)))
+AOBJS=$(patsubst $(SRCDIR)/%.o,$(OBJDIR)/%.o,$(patsubst %.S,%.o,$(ASRCS)))
+
+OBJS=$(COBJS) $(AOBJS)
+	
+all: $(FLASH_EXEC)
+ram: $(RAM_EXEC)
+.PHONY clean:
+	@ rm -f $(FLASH_EXEC) $(FLASH_EXEC).elf $(FLASH_EXEC).s19\
+			$(RAM_EXEC) $(RAM_EXEC).elf $(RAM_EXEC).s19\
+			$(OBJS) $(MAPFILE) $(LDCFILE) depend 
+
+$(FLASH_EXEC): TARGET_ADDRESS=0xe0000000
+$(RAM_EXEC): TARGET_ADDRESS=0x10000000
+
+$(FLASH_EXEC) $(RAM_EXEC): $(OBJS) $(LDCSRC)
+	$(CPP) -P -DTARGET_ADDRESS=$(TARGET_ADDRESS) -DFORMAT=$(FORMAT) $(LDCSRC) -o $(LDCFILE)
+	$(LD) --oformat $(FORMAT) -Map $(MAPFILE) --cref -T $(LDCFILE) -o $@
+ifeq ($(COMPILE_ELF),Y)
+	$(OBJCOPY) -O srec $@ $@.s19
+else
+	objcopy -I srec -O elf32-big --alt-machine-code 4 $@ $@.elf
+endif
+	
+# compile init_fpga with -mbitfield for testing purposes
+$(OBJDIR)/init_fpga.o:	CFLAGS += -mbitfield
+
+# compile printf pc-relative so it can be used as well before and after copy of BaS
+$(OBJDIR)/bas_printf.o:	CFLAGS += -mpcrel
+# the same for flush_and_invalidate_cache()
+$(OBJDIR)/cache.o: CFLAGS += -mpcrel
+
+$(OBJDIR)/%.o:$(SRCDIR)/%.c
+	$(CC) -c $(CFLAGS) $(INCLUDE) $< -o $@
+
+$(OBJDIR)/%.o:$(SRCDIR)/%.S
+	$(CC) -c $(CFLAGS) -Wa,--bitwise-or $(INCLUDE) $< -o $@
+
+depend: $(ASRCS) $(CSRCS)
+	$(CC) $(CFLAGS) $(INCLUDE) -M $(ASRCS) $(CSRCS) > depend
+	
+ifneq (clean,$(MAKECMDGOALS))
+-include depend
+endif