S390: ccw firmware: Add Makefile

This patch adds a makefile, so we can build our ccw firmware. Also
add the resulting binaries to .gitignore, so that nobody is annoyed
they might be in the tree.
Signed-off-by: NAlexander Graf <agraf@suse.de>

.gitignore

@@ -100,6 +100,8 @@ pc-bios/optionrom/kvmvapic.asm
 pc-bios/optionrom/kvmvapic.bin
 pc-bios/optionrom/kvmvapic.raw
 pc-bios/optionrom/kvmvapic.img
+pc-bios/s390-ccw/s390-ccw.elf
+pc-bios/s390-ccw/s390-ccw.img
 .stgit-*
 cscope.*
 tags

pc-bios/s390-ccw/Makefile

+all: build-all
+# Dummy command so that make thinks it has done something
+	@true
+
+include ../../config-host.mak
+include $(SRC_PATH)/rules.mak
+
+$(call set-vpath, $(SRC_PATH)/pc-bios/s390-ccw)
+
+.PHONY : all clean build-all
+
+OBJECTS=main.o bootmap.o sclp-ascii.o virtio.o start.o
+CFLAGS += -fno-stack-protector
+# XXX find a more clever to locate the bootloader
+LDFLAGS += -Wl,-Ttext,0x7e00000,-Tbss,0x7f00000 -nostdlib
+
+build-all: s390-ccw.img
+
+s390-ccw.elf: $(OBJECTS)
+	$(call quiet-command,$(CC) $(LDFLAGS) -o $@ $(OBJECTS),"  Building $(TARGET_DIR)$@")
+
+s390-ccw.img: s390-ccw.elf
+	$(call quiet-command,strip $@,"  Stripping $(TARGET_DIR)$@")
+
+clean:
+	rm -f *.o *.d *.img *~