216 lines
7.9 KiB
Makefile
216 lines
7.9 KiB
Makefile
# Makefile for making ELF bootable images for booting on CHRP
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# using Open Firmware.
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#
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# Geert Uytterhoeven September 1997
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#
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# Based on coffboot by Paul Mackerras
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# Simplified for ppc64 by Todd Inglett
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#
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# NOTE: this code is built for 32 bit in ELF32 format even though
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# it packages a 64 bit kernel. We do this to simplify the
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# bootloader and increase compatibility with OpenFirmware.
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#
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# To this end we need to define BOOTCC, etc, as the tools
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# needed to build the 32 bit image. These are normally HOSTCC,
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# but may be a third compiler if, for example, you are cross
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# compiling from an intel box. Once the 64bit ppc gcc is
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# stable it will probably simply be a compiler switch to
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# compile for 32bit mode.
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# To make it easier to setup a cross compiler,
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# CROSS32_COMPILE is setup as a prefix just like CROSS_COMPILE
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# in the toplevel makefile.
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HOSTCC := gcc
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BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \
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$(shell $(CROSS32CC) -print-file-name=include) -fPIC
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BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
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OBJCOPYFLAGS := contents,alloc,load,readonly,data
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OBJCOPY_COFF_ARGS := -O aixcoff-rs6000 --set-start 0x500000
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OBJCOPY_MIB_ARGS := -O aixcoff-rs6000 -R .stab -R .stabstr -R .comment
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zlib := inffast.c inflate.c inftrees.c
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zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h
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zliblinuxheader := zlib.h zconf.h zutil.h
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$(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
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#$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)
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src-boot := crt0.S string.S prom.c stdio.c main.c div64.S
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src-boot += $(zlib)
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src-boot := $(addprefix $(obj)/, $(src-boot))
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obj-boot := $(addsuffix .o, $(basename $(src-boot)))
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BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj)
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quiet_cmd_copy_zlib = COPY $@
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cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
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quiet_cmd_copy_zlibheader = COPY $@
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cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
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# stddef.h for NULL
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quiet_cmd_copy_zliblinuxheader = COPY $@
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cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
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$(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
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$(call cmd,copy_zlib)
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$(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
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$(call cmd,copy_zlibheader)
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$(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
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$(call cmd,copy_zliblinuxheader)
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clean-files := $(zlib) $(zlibheader) $(zliblinuxheader)
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quiet_cmd_bootcc = BOOTCC $@
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cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
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quiet_cmd_bootas = BOOTAS $@
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cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
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quiet_cmd_bootld = BOOTLD $@
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cmd_bootld = $(CROSS32LD) -T $(srctree)/$(src)/$(3) -o $@ $(2)
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$(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c
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$(call if_changed_dep,bootcc)
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$(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S
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$(call if_changed_dep,bootas)
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#-----------------------------------------------------------
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# ELF sections within the zImage bootloader/wrapper
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#-----------------------------------------------------------
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required := vmlinux.strip
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initrd := initrd
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obj-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.o, $(section)))
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src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section)))
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gz-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section)))
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hostprogs-y := addnote addRamDisk hack-coff
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targets += zImage.vmode zImage.initrd.vmode zImage zImage.initrd \
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zImage.coff zImage.initrd.coff miboot.image miboot.initrd.image \
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$(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd))) \
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$(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd))) \
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$(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd))) \
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vmlinux.initrd dummy.o
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extra-y := initrd.o
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quiet_cmd_ramdisk = RAMDISK $@
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cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@
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quiet_cmd_stripvm = STRIP $@
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cmd_stripvm = $(STRIP) -s -R .comment $< -o $@
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vmlinux.strip: vmlinux
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$(call if_changed,stripvm)
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$(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz
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$(call if_changed,ramdisk)
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quiet_cmd_addsection = ADDSEC $@
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cmd_addsection = $(CROSS32OBJCOPY) $@ \
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--add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(patsubst %.o,%.gz, $@) \
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--set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(OBJCOPYFLAGS)
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quiet_cmd_addnote = ADDNOTE $@
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cmd_addnote = $(obj)/addnote $@
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quiet_cmd_gen-miboot = GEN $@
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cmd_gen-miboot = $(OBJCOPY) $(OBJCOPY_MIB_ARGS) \
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--add-section=$1=$(word 2, $^) $< $@
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quiet_cmd_gencoff = COFF $@
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cmd_gencoff = $(OBJCOPY) $(OBJCOPY_COFF_ARGS) $@ && \
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$(obj)/hack-coff $@
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$(call gz-sec, $(required)): $(obj)/kernel-%.gz: %
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$(call if_changed,gzip)
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$(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz
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cp -f $(obj)/ramdisk.image.gz $@
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$(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz
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@touch $@
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$(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c
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$(call if_changed_dep,bootcc)
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$(call cmd,addsection)
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$(obj)/zImage.vmode $(obj)/zImage.coff: obj-boot += $(call obj-sec, $(required))
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$(obj)/zImage.vmode: $(call obj-sec, $(required)) $(obj-boot) $(srctree)/$(src)/zImage.lds
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$(call cmd,bootld,$(obj-boot),zImage.lds)
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$(obj)/zImage.initrd.vmode $(obj)/zImage.initrd.coff: obj-boot += $(call obj-sec, $(required) $(initrd))
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$(obj)/zImage.initrd.vmode: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(srctree)/$(src)/zImage.lds
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$(call cmd,bootld,$(obj-boot),zImage.lds)
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# For 32-bit powermacs, build the COFF and miboot images
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# as well as the ELF images.
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coffimage-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.coff
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coffrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.initrd.coff
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mibootimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/miboot.image
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mibrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/miboot.initrd.image
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$(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote $(coffimage-y-y) \
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$(mibootimg-y-y)
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@cp -f $< $@
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$(call if_changed,addnote)
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$(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote \
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$(coffrdimg-y-y) $(mibrdimg-y-y)
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@cp -f $< $@
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$(call if_changed,addnote)
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$(obj)/zImage.coff: $(call obj-sec, $(required)) $(obj-boot) \
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$(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff
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$(call cmd,bootld,$(obj-boot),zImage.coff.lds)
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$(call cmd,gencoff)
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$(obj)/zImage.initrd.coff: $(call obj-sec, $(required) $(initrd)) $(obj-boot) \
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$(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff
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$(call cmd,bootld,$(obj-boot),zImage.coff.lds)
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$(call cmd,gencoff)
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$(obj)/miboot.image: $(obj)/dummy.o $(obj)/vmlinux.gz
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$(call cmd,gen-miboot,image)
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$(obj)/miboot.initrd.image: $(obj)/miboot.image $(images)/ramdisk.image.gz
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$(call cmd,gen-miboot,initrd)
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#-----------------------------------------------------------
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# build u-boot images
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#-----------------------------------------------------------
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quiet_cmd_mygzip = GZIP $@
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cmd_mygzip = gzip -f -9 < $< > $@.$$$$ && mv $@.$$$$ $@
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quiet_cmd_objbin = OBJCOPY $@
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cmd_objbin = $(OBJCOPY) -O binary $< $@
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quiet_cmd_uimage = UIMAGE $@
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cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A ppc -O linux -T kernel \
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-C gzip -a 00000000 -e 00000000 -n 'Linux-$(KERNELRELEASE)' \
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-d $< $@
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MKIMAGE := $(srctree)/scripts/mkuboot.sh
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targets += uImage
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extra-y += vmlinux.bin vmlinux.gz
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$(obj)/vmlinux.bin: vmlinux FORCE
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$(call if_changed,objbin)
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$(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE
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$(call if_changed,mygzip)
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$(obj)/uImage: $(obj)/vmlinux.gz
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$(Q)rm -f $@
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$(call cmd,uimage)
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@echo -n ' Image: $@ '
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@if [ -f $@ ]; then echo 'is ready' ; else echo 'not made'; fi
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install: $(CONFIGURE) $(BOOTIMAGE)
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sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)"
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clean-files += $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip)
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