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# 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
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#	needed to build the 32 bit image.  That's normally the same
#	compiler for the rest of the kernel, with the -m32 flag added.
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#	To make it easier to setup a cross compiler,
#	CROSS32_COMPILE is setup as a prefix just like CROSS_COMPILE
#	in the toplevel makefile.

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all: $(obj)/zImage
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BOOTCFLAGS    := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
		 -fno-strict-aliasing -Os -msoft-float -pipe \
		 -fomit-frame-pointer -fno-builtin -fPIC -nostdinc \
		 -isystem $(shell $(CROSS32CC) -print-file-name=include)
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BOOTAFLAGS	:= -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
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ifeq ($(call cc-option-yn, -fstack-protector),y)
BOOTCFLAGS	+= -fno-stack-protector
endif

BOOTCFLAGS	+= -I$(obj) -I$(srctree)/$(obj)
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$(obj)/44x.o: BOOTCFLAGS += -mcpu=440
$(obj)/ebony.o: BOOTCFLAGS += -mcpu=440
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zlib       := inffast.c inflate.c inftrees.c
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) gunzip_util.o main.o): \
	$(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
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src-wlib := string.S crt0.S stdio.c main.c flatdevtree.c flatdevtree_misc.c \
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		ns16550.c serial.c simple_alloc.c div64.S util.S \
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		gunzip_util.c elf_util.c $(zlib) devtree.c oflib.c ofconsole.c \
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		44x.c ebony.c mv64x60.c mpsc.c mv64x60_i2c.c cuboot.c
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src-plat := of.c cuboot-83xx.c cuboot-85xx.c holly.c \
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		cuboot-ebony.c treeboot-ebony.c prpmc2800.c
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src-boot := $(src-wlib) $(src-plat) empty.c
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src-boot := $(addprefix $(obj)/, $(src-boot))
obj-boot := $(addsuffix .o, $(basename $(src-boot)))
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obj-wlib := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-wlib))))
obj-plat := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-plat))))
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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
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/%
	$(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)

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$(obj)/empty.c:
	@touch $@

$(obj)/zImage.lds $(obj)/zImage.coff.lds: $(obj)/%: $(srctree)/$(src)/%.S
	@cp $< $@
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clean-files := $(zlib) $(zlibheader) $(zliblinuxheader) \
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		empty.c zImage.coff.lds zImage.lds
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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 $@ $<

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quiet_cmd_bootar = BOOTAR  $@
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      cmd_bootar = $(CROSS32AR) -cr $@.$$$$ $(filter-out FORCE,$^); mv $@.$$$$ $@
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$(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c FORCE
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	$(call if_changed_dep,bootcc)
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$(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S FORCE
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	$(call if_changed_dep,bootas)

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$(obj)/wrapper.a: $(obj-wlib) FORCE
	$(call if_changed,bootar)
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hostprogs-y	:= addnote addRamDisk hack-coff mktree
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targets		+= $(patsubst $(obj)/%,%,$(obj-boot) wrapper.a)
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extra-y		:= $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \
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		   $(obj)/zImage.lds $(obj)/zImage.coff.lds
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wrapper		:=$(srctree)/$(src)/wrapper
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wrapperbits	:= $(extra-y) $(addprefix $(obj)/,addnote hack-coff mktree) \
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			$(wrapper) FORCE
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#############
# Bits for building various flavours of zImage
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ifneq ($(CROSS32_COMPILE),)
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CROSSWRAP := -C "$(CROSS32_COMPILE)"
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else
ifneq ($(CROSS_COMPILE),)
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CROSSWRAP := -C "$(CROSS_COMPILE)"
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endif
endif
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# args (to if_changed): 1 = (this rule), 2 = platform, 3 = dts 4=dtb 5=initrd
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quiet_cmd_wrap	= WRAP    $@
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      cmd_wrap	=$(CONFIG_SHELL) $(wrapper) -c -o $@ -p $2 $(CROSSWRAP) \
		$(if $3, -s $3)$(if $4, -d $4)$(if $5, -i $5) vmlinux
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image-$(CONFIG_PPC_PSERIES)		+= zImage.pseries
image-$(CONFIG_PPC_MAPLE)		+= zImage.pseries
image-$(CONFIG_PPC_IBM_CELL_BLADE)	+= zImage.pseries
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image-$(CONFIG_PPC_PS3)			+= zImage.ps3
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image-$(CONFIG_PPC_CELLEB)		+= zImage.pseries
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image-$(CONFIG_PPC_CHRP)		+= zImage.chrp
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image-$(CONFIG_PPC_EFIKA)		+= zImage.chrp
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image-$(CONFIG_PPC_PMAC)		+= zImage.pmac
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image-$(CONFIG_PPC_HOLLY)		+= zImage.holly-elf
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image-$(CONFIG_PPC_PRPMC2800)		+= zImage.prpmc2800
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image-$(CONFIG_PPC_ISERIES)		+= zImage.iseries
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image-$(CONFIG_DEFAULT_UIMAGE)		+= uImage

ifneq ($(CONFIG_DEVICE_TREE),"")
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image-$(CONFIG_PPC_83xx)		+= cuImage.83xx
image-$(CONFIG_PPC_85xx)		+= cuImage.85xx
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image-$(CONFIG_EBONY)			+= treeImage.ebony cuImage.ebony
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endif
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# For 32-bit powermacs, build the COFF and miboot images
# as well as the ELF images.
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ifeq ($(CONFIG_PPC32),y)
image-$(CONFIG_PPC_PMAC)	+= zImage.coff zImage.miboot
endif

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initrd-  := $(patsubst zImage%, zImage.initrd%, $(image-n) $(image-))
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initrd-y := $(patsubst zImage%, zImage.initrd%, \
		$(patsubst treeImage%, treeImage.initrd%, $(image-y)))
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initrd-y := $(filter-out $(image-y), $(initrd-y))
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targets	+= $(image-y) $(initrd-y)
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$(addprefix $(obj)/, $(initrd-y)): $(obj)/ramdisk.image.gz

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# If CONFIG_WANT_DEVICE_TREE is set and CONFIG_DEVICE_TREE isn't an
# empty string, define 'dts' to be path to the dts
# CONFIG_DEVICE_TREE will have "" around it, make sure to strip them
ifeq ($(CONFIG_WANT_DEVICE_TREE),y)
ifneq ($(CONFIG_DEVICE_TREE),"")
dts = $(if $(shell echo $(CONFIG_DEVICE_TREE) | grep '^/'),\
	,$(srctree)/$(src)/dts/)$(CONFIG_DEVICE_TREE:"%"=%)
endif
endif

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# Don't put the ramdisk on the pattern rule; when its missing make will try
# the pattern rule with less dependencies that also matches (even with the
# hard dependency listed).
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$(obj)/zImage.initrd.%: vmlinux $(wrapperbits) $(dts)
	$(call if_changed,wrap,$*,$(dts),,$(obj)/ramdisk.image.gz)
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$(obj)/zImage.%: vmlinux $(wrapperbits) $(dts)
	$(call if_changed,wrap,$*,$(dts))
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$(obj)/zImage.iseries: vmlinux
	$(STRIP) -s -R .comment $< -o $@

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$(obj)/zImage.ps3: vmlinux
	$(STRIP) -s -R .comment $< -o $@

$(obj)/zImage.initrd.ps3: vmlinux
	@echo "  WARNING zImage.initrd.ps3 not supported (yet)"

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$(obj)/zImage.holly-elf: vmlinux $(wrapperbits)
	$(call if_changed,wrap,holly,$(obj)/dts/holly.dts,,)

$(obj)/zImage.initrd.holly-elf: vmlinux $(wrapperbits) $(obj)/ramdisk.image.gz
	$(call if_changed,wrap,holly,$(obj)/dts/holly.dts,,$(obj)/ramdisk.image.gz)

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$(obj)/uImage: vmlinux $(wrapperbits)
	$(call if_changed,wrap,uboot)

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$(obj)/cuImage.%: vmlinux $(dts) $(wrapperbits)
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	$(call if_changed,wrap,cuboot-$*,$(dts))
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$(obj)/treeImage.initrd.%: vmlinux $(dts) $(wrapperbits)
	$(call if_changed,wrap,treeboot-$*,$(dts),,$(obj)/ramdisk.image.gz)

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$(obj)/treeImage.%: vmlinux $(dts) $(wrapperbits)
	$(call if_changed,wrap,treeboot-$*,$(dts))

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$(obj)/zImage:		$(addprefix $(obj)/, $(image-y))
	@rm -f $@; ln $< $@
$(obj)/zImage.initrd:	$(addprefix $(obj)/, $(initrd-y))
	@rm -f $@; ln $< $@

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install: $(CONFIGURE) $(addprefix $(obj)/, $(image-y))
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	sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" $<

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# anything not in $(targets)
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clean-files += $(image-) $(initrd-) zImage zImage.initrd cuImage.* treeImage.*
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# clean up files cached by wrapper
clean-kernel := vmlinux.strip vmlinux.bin
clean-kernel += $(addsuffix .gz,$(clean-kernel))
# If not absolute clean-files are relative to $(obj).
clean-files += $(addprefix $(objtree)/, $(clean-kernel))