Distinguish crt0 variants more clearly, update BIOS to use CTR variant (as it has no .data section).

litex/soc/software/bios/Makefile

@@ -23,9 +23,9 @@ endif
 
 bios.elf: $(BIOS_DIRECTORY)/linker.ld $(OBJECTS)
 
-%.elf: ../libbase/crt0-$(CPU).o ../libnet/libnet.a ../libbase/libbase-nofloat.a ../libcompiler_rt/libcompiler_rt.a
+%.elf: ../libbase/crt0-$(CPU)-ctr.o ../libnet/libnet.a ../libbase/libbase-nofloat.a ../libcompiler_rt/libcompiler_rt.a
 	$(LD) $(LDFLAGS) -T $(BIOS_DIRECTORY)/linker.ld -N -o $@ \
-		../libbase/crt0-$(CPU).o \
+		../libbase/crt0-$(CPU)-ctr.o \
 		$(OBJECTS) \
 		-L../libnet \
 		-L../libbase \

litex/soc/software/libbase/Makefile

@@ -4,7 +4,7 @@ include $(SOC_DIRECTORY)/software/common.mak
 OBJECTS=exception.o libc.o errno.o crc16.o crc32.o console.o \
 	system.o id.o uart.o time.o qsort.o strtod.o spiflash.o strcasecmp.o
 
-all: crt0-$(CPU).o crt0-$(CPU)-flash.o libbase.a libbase-nofloat.a
+all: crt0-$(CPU)-ctr.o crt0-$(CPU)-xip.o libbase.a libbase-nofloat.a
 
 libbase.a: $(OBJECTS) vsnprintf.o
 	$(AR) crs libbase.a $(OBJECTS) vsnprintf.o
@@ -24,8 +24,11 @@ vsnprintf-nofloat.o: $(LIBBASE_DIRECTORY)/vsnprintf.c
 %.o: $(LIBBASE_DIRECTORY)/%.S
 	$(assemble)
 
-crt0-$(CPU)-flash.o: $(LIBBASE_DIRECTORY)/crt0-$(CPU).S
-	$(CC) -c -DFLASH_DATA_SECTION $(CFLAGS) -o $@ $<
+crt0-$(CPU)-ctr.o: $(LIBBASE_DIRECTORY)/crt0-$(CPU).S
+	$(assemble)
+
+crt0-$(CPU)-xip.o: $(LIBBASE_DIRECTORY)/crt0-$(CPU).S
+	$(CC) -c -DEXECUTE_IN_PLACE $(CFLAGS) -o $@ $<
 
 .PHONY: all clean
 

litex/soc/software/libbase/crt0-lm32.S

@@ -112,7 +112,7 @@ _crt0:
 	mvhi    sp, hi(_fstack)
 	ori     sp, sp, lo(_fstack)
 
-#ifdef FLASH_DATA_SECTION
+#ifdef EXECUTE_IN_PLACE
 	/* Load DATA */
 	mvhi    r1, hi(_erodata)
 	ori     r1, r1, lo(_erodata)