27fbaa9702
This patch adds a library of useful device tree manipulation functions to the zImage library, for use by platform code. These functions are based on the hooks already in dt_ops, so they're not dependent on a particular device tree implementation. This patch also slightly streamlines the code in main.c using these new functions. This is a consolidation of my work in this area with Scott Wood's patches to a very similar end. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
175 lines
6.0 KiB
Makefile
175 lines
6.0 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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all: $(obj)/zImage
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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__ $(BOOTCFLAGS) -traditional -nostdinc
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ifeq ($(call cc-option-yn, -fstack-protector),y)
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BOOTCFLAGS += -fno-stack-protector
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endif
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BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj)
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zlib := inffast.c inflate.c inftrees.c
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zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h
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zliblinuxheader := zlib.h zconf.h zutil.h
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$(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) \
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$(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 $(zlib) devtree.c
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src-plat := of.c
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src-boot := $(src-wlib) $(src-plat) empty.c
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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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obj-wlib := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-wlib))))
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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
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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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$(obj)/empty.c:
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@touch $@
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$(obj)/zImage.lds $(obj)/zImage.coff.lds: $(obj)/%: $(srctree)/$(src)/%.S
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@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 $@
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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_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: $(obj-wlib) FORCE
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$(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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#############
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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
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ifneq ($(CROSS_COMPILE),)
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CROSSWRAP := -C "$(CROSS_COMPILE)"
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endif
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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 $(CROSSWRAP) \
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$(if $3, -s $3)$(if $4, -d $4)$(if $5, -i $5) vmlinux
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image-$(CONFIG_PPC_PSERIES) += zImage.pseries
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image-$(CONFIG_PPC_MAPLE) += zImage.pseries
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image-$(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_DEFAULT_UIMAGE) += uImage
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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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ifeq ($(CONFIG_PPC32),y)
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image-$(CONFIG_PPC_PMAC) += zImage.coff zImage.miboot
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endif
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initrd- := $(patsubst zImage%, zImage.initrd%, $(image-n) $(image-))
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initrd-y := $(patsubst zImage%, zImage.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)): $(obj)/ramdisk.image.gz
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# Don't put the ramdisk on the pattern rule; when its missing make will try
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# the pattern rule with less dependencies that also matches (even with the
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# hard dependency listed).
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$(obj)/zImage.initrd.%: vmlinux $(wrapperbits)
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$(call if_changed,wrap,$*,,,$(obj)/ramdisk.image.gz)
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$(obj)/zImage.%: vmlinux $(wrapperbits)
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$(call if_changed,wrap,$*)
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$(obj)/zImage.ps3: vmlinux
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$(STRIP) -s -R .comment $< -o $@
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$(obj)/zImage.initrd.ps3: vmlinux
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@echo " WARNING zImage.initrd.ps3 not supported (yet)"
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$(obj)/uImage: vmlinux $(wrapperbits)
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$(call if_changed,wrap,uboot)
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$(obj)/zImage: $(addprefix $(obj)/, $(image-y))
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@rm -f $@; ln $< $@
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$(obj)/zImage.initrd: $(addprefix $(obj)/, $(initrd-y))
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@rm -f $@; ln $< $@
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install: $(CONFIGURE) $(image-y)
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sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" $<
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clean-files += $(addprefix $(objtree)/, vmlinux.strip.gz vmlinux.bin.gz)
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clean-files += $(image-) $(initrd-) zImage zImage.initrd
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