linux-imx/arch/powerpc/boot/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) -fno-builtin -nostdinc -isystem
$(shell $(CROSS32CC) -print-file-name=include) -fPIC BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc OBJCOPYFLAGS := contents,alloc,load,readonly,data OBJCOPY_COFF_ARGS := -O aixcoff-rs6000 --set-start 0x500000 OBJCOPY_MIB_ARGS := -O aixcoff-rs6000 -R .stab -R .stabstr -R .comment

zlib := infblock.c infcodes.c inffast.c inflate.c inftrees.c infutil.c zlibheader := infblock.h infcodes.h inffast.h inftrees.h infutil.h zliblinuxheader := zlib.h zconf.h zutil.h

$(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader)) #$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)

src-boot := crt0.S string.S prom.c stdio.c main.c div64.S src-boot += $(zlib) src-boot := $(addprefix $(obj)/, $(src-boot)) obj-boot := $(addsuffix .o, $(basename $(src-boot)))

BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj)

quiet_cmd_copy_zlib = COPY $@ cmd_copy_zlib = sed "s@attribute_used@@;s@<linux/[^>]\+.*@"\1"@" $< > $@

quiet_cmd_copy_zlibheader = COPY $@ cmd_copy_zlibheader = sed "s@<linux/[^>]\+.*@"\1"@" $< > $@

stddef.h for NULL

quiet_cmd_copy_zliblinuxheader = COPY $@ cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@"string.h"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/[^>]\+.*@"\1"@" $< > $@

$(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/% $(call cmd,copy_zlib)

$(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/% $(call cmd,copy_zlibheader)

$(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/% $(call cmd,copy_zliblinuxheader)

clean-files := $(zlib) $(zlibheader) $(zliblinuxheader)

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 $@ $<

quiet_cmd_bootld = BOOTLD $@ cmd_bootld = $(CROSS32LD) -T $(srctree)/$(src)/$(3) -o $@ $(2)

$(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 := addnote addRamDisk hack-coff

targets += zImage.vmode zImage.initrd.vmode zImage zImage.initrd
zImage.coff zImage.initrd.coff miboot.image miboot.initrd.image
$(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd)))
$(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd)))
$(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd)))
vmlinux.initrd dummy.o extra-y := initrd.o

quiet_cmd_ramdisk = RAMDISK $@ cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@

quiet_cmd_stripvm = STRIP $@ cmd_stripvm = $(STRIP) -s -R .comment $< -o $@

vmlinux.strip: vmlinux $(call if_changed,stripvm) $(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz $(call if_changed,ramdisk)

quiet_cmd_addsection = ADDSEC $@ cmd_addsection = $(CROSS32OBJCOPY) $@
--add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(patsubst %.o,%.gz, $@)
--set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(OBJCOPYFLAGS)

quiet_cmd_addnote = ADDNOTE $@ cmd_addnote = $(obj)/addnote $@

quiet_cmd_gen-miboot = GEN $@ cmd_gen-miboot = $(OBJCOPY) $(OBJCOPY_MIB_ARGS)
--add-section=$1=$(word 2, $^) $< $@

quiet_cmd_gencoff = COFF $@ cmd_gencoff = $(OBJCOPY) $(OBJCOPY_COFF_ARGS) $@ &&
$(obj)/hack-coff $@

$(call gz-sec, $(required)): $(obj)/kernel-%.gz: % $(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 @touch $@

$(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c $(call if_changed_dep,bootcc) $(call cmd,addsection)

$(obj)/zImage.vmode $(obj)/zImage.coff: obj-boot += $(call obj-sec, $(required)) $(obj)/zImage.vmode: $(call obj-sec, $(required)) $(obj-boot) $(srctree)/$(src)/zImage.lds $(call cmd,bootld,$(obj-boot),zImage.lds)

$(obj)/zImage.initrd.vmode $(obj)/zImage.initrd.coff: obj-boot += $(call obj-sec, $(required) $(initrd)) $(obj)/zImage.initrd.vmode: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(srctree)/$(src)/zImage.lds $(call cmd,bootld,$(obj-boot),zImage.lds)

For 32-bit powermacs, build the COFF and miboot images

as well as the ELF images.

coffimage-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.coff coffrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.initrd.coff mibootimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/miboot.image mibrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/miboot.initrd.image

$(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote $(coffimage-y-y)
$(mibootimg-y-y) @cp -f $< $@ $(call if_changed,addnote)

$(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote
$(coffrdimg-y-y) $(mibrdimg-y-y) @cp -f $< $@ $(call if_changed,addnote)

$(obj)/zImage.coff: $(call obj-sec, $(required)) $(obj-boot)
$(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff $(call cmd,bootld,$(obj-boot),zImage.coff.lds) $(call cmd,gencoff)

$(obj)/zImage.initrd.coff: $(call obj-sec, $(required) $(initrd)) $(obj-boot)
$(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff $(call cmd,bootld,$(obj-boot),zImage.coff.lds) $(call cmd,gencoff)

$(obj)/miboot.image: $(obj)/dummy.o $(obj)/vmlinux.gz $(call cmd,gen-miboot,image)

$(obj)/miboot.initrd.image: $(obj)/miboot.image $(images)/ramdisk.image.gz $(call cmd,gen-miboot,initrd)

#-----------------------------------------------------------

build u-boot images

#----------------------------------------------------------- quiet_cmd_mygzip = GZIP $@ cmd_mygzip = gzip -f -9 < $< > $@.$$ && mv $@.$$ $@

quiet_cmd_objbin = OBJCOPY $@ cmd_objbin = $(OBJCOPY) -O binary $< $@

quiet_cmd_uimage = UIMAGE $@ cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A ppc -O linux -T kernel
-C gzip -a 00000000 -e 00000000 -n 'Linux-$(KERNELRELEASE)'
-d $< $@

MKIMAGE := $(srctree)/scripts/mkuboot.sh targets += uImage extra-y += vmlinux.bin vmlinux.gz

$(obj)/vmlinux.bin: vmlinux FORCE $(call if_changed,objbin)

$(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE $(call if_changed,mygzip)

$(obj)/uImage: $(obj)/vmlinux.gz $(Q)rm -f $@ $(call cmd,uimage) @echo -n ' Image: $@ ' @if [ -f $@ ]; then echo 'is ready' ; else echo 'not made'; fi

install: $(CONFIGURE) $(BOOTIMAGE) sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)"

clean-files += $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip)