1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
118 lines
4.5 KiB
Makefile
118 lines
4.5 KiB
Makefile
# 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)
|