diff options
Diffstat (limited to 'arch/ppc64/boot/Makefile')
| -rw-r--r-- | arch/ppc64/boot/Makefile | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/arch/ppc64/boot/Makefile b/arch/ppc64/boot/Makefile new file mode 100644 index 000000000000..d3e1d6af9203 --- /dev/null +++ b/arch/ppc64/boot/Makefile @@ -0,0 +1,117 @@ +# Makefile for making ELF bootable images for booting on CHRP +# using Open Firmware. +# +# Geert Uytterhoeven September 1997 +# +# Based on coffboot by Paul Mackerras +# Simplified for ppc64 by Todd Inglett +# +# NOTE: this code is built for 32 bit in ELF32 format even though +# it packages a 64 bit kernel. We do this to simplify the +# bootloader and increase compatibility with OpenFirmware. +# +# To this end we need to define BOOTCC, etc, as the tools +# needed to build the 32 bit image. These are normally HOSTCC, +# but may be a third compiler if, for example, you are cross +# compiling from an intel box. Once the 64bit ppc gcc is +# stable it will probably simply be a compiler switch to +# compile for 32bit mode. +# To make it easier to setup a cross compiler, +# CROSS32_COMPILE is setup as a prefix just like CROSS_COMPILE +# in the toplevel makefile. + + +HOSTCC := gcc +BOOTCFLAGS := $(HOSTCFLAGS) $(LINUXINCLUDE) -fno-builtin +BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional +BOOTLFLAGS := -Ttext 0x00400000 -e _start -T $(srctree)/$(src)/zImage.lds +OBJCOPYFLAGS := contents,alloc,load,readonly,data + +src-boot := crt0.S string.S prom.c main.c zlib.c imagesize.c div64.S +src-boot := $(addprefix $(obj)/, $(src-boot)) +obj-boot := $(addsuffix .o, $(basename $(src-boot))) + +quiet_cmd_bootcc = BOOTCC $@ + cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $< + +quiet_cmd_bootas = BOOTAS $@ + cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $< + +$(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c + $(call if_changed_dep,bootcc) +$(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S + $(call if_changed_dep,bootas) + +#----------------------------------------------------------- +# ELF sections within the zImage bootloader/wrapper +#----------------------------------------------------------- +required := vmlinux.strip +initrd := initrd + +obj-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.o, $(section))) +src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section))) +gz-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section))) + +hostprogs-y := piggy addnote addRamDisk +targets += zImage zImage.initrd imagesize.c \ + $(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd))) \ + $(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd))) \ + $(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd))) \ + vmlinux.initrd +extra-y := initrd.o + +quiet_cmd_ramdisk = RAMDISK $@ + cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@ + +quiet_cmd_stripvm = STRIP $@ + cmd_stripvm = $(STRIP) -s $< -o $@ + +vmlinux.strip: vmlinux FORCE + $(call if_changed,stripvm) +$(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz FORCE + $(call if_changed,ramdisk) + +addsection = $(CROSS32OBJCOPY) $(1) \ + --add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $(1)))=$(patsubst %.o,%.gz, $(1)) \ + --set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $(1)))=$(OBJCOPYFLAGS) + +quiet_cmd_addnote = ADDNOTE $@ + cmd_addnote = $(CROSS32LD) $(BOOTLFLAGS) -o $@ $(obj-boot) && $(obj)/addnote $@ + +quiet_cmd_piggy = PIGGY $@ + cmd_piggy = $(obj)/piggyback $(@:.o=) < $< | $(CROSS32AS) -o $@ + +$(call gz-sec, $(required)): $(obj)/kernel-%.gz: % FORCE + $(call if_changed,gzip) + +$(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz + cp -f $(obj)/ramdisk.image.gz $@ + +$(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz FORCE + touch $@ + +$(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c FORCE + $(call if_changed_dep,bootcc) + $(call addsection, $@) + +$(obj)/zImage: obj-boot += $(call obj-sec, $(required)) +$(obj)/zImage: $(call obj-sec, $(required)) $(obj-boot) $(obj)/addnote FORCE + $(call if_changed,addnote) + +$(obj)/zImage.initrd: obj-boot += $(call obj-sec, $(required) $(initrd)) +$(obj)/zImage.initrd: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(obj)/addnote FORCE + $(call if_changed,addnote) + +$(obj)/imagesize.c: vmlinux.strip + @echo Generating $@ + ls -l vmlinux.strip | \ + awk '{printf "/* generated -- do not edit! */\n" \ + "unsigned long vmlinux_filesize = %d;\n", $$5}' > $(obj)/imagesize.c + $(CROSS_COMPILE)nm -n vmlinux | tail -n 1 | \ + awk '{printf "unsigned long vmlinux_memsize = 0x%s;\n", substr($$1,8)}' \ + >> $(obj)/imagesize.c + +install: $(CONFIGURE) $(BOOTIMAGE) + sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)" + +clean-files := $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip) |