1 # Makefile for making ELF bootable images for booting on CHRP
4 # Geert Uytterhoeven September 1997
6 # Based on coffboot by Paul Mackerras
7 # Simplified for ppc64 by Todd Inglett
9 # NOTE: this code is built for 32 bit in ELF32 format even though
10 # it packages a 64 bit kernel. We do this to simplify the
11 # bootloader and increase compatibility with OpenFirmware.
13 # To this end we need to define BOOTCC, etc, as the tools
14 # needed to build the 32 bit image. These are normally HOSTCC,
15 # but may be a third compiler if, for example, you are cross
16 # compiling from an intel box. Once the 64bit ppc gcc is
17 # stable it will probably simply be a compiler switch to
18 # compile for 32bit mode.
19 # To make it easier to setup a cross compiler,
20 # CROSS32_COMPILE is setup as a prefix just like CROSS_COMPILE
21 # in the toplevel makefile.
26 BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \
27 $(shell $(CROSS32CC) -print-file-name=include) -fPIC
28 BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
30 ifeq ($(call cc-option-yn, -fstack-protector),y)
31 BOOTCFLAGS += -fno-stack-protector
34 BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj)
36 zlib := inffast.c inflate.c inftrees.c
37 zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h
38 zliblinuxheader := zlib.h zconf.h zutil.h
40 $(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) \
41 $(addprefix $(obj)/,$(zlibheader))
43 src-wlib := string.S crt0.S stdio.c main.c flatdevtree.c flatdevtree_misc.c \
44 ns16550.c serial.c simple_alloc.c div64.S util.S \
45 gunzip_util.c elf_util.c $(zlib) devtree.c
47 src-boot := $(src-wlib) $(src-plat) empty.c
49 src-boot := $(addprefix $(obj)/, $(src-boot))
50 obj-boot := $(addsuffix .o, $(basename $(src-boot)))
51 obj-wlib := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-wlib))))
52 obj-plat := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-plat))))
54 quiet_cmd_copy_zlib = COPY $@
55 cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
57 quiet_cmd_copy_zlibheader = COPY $@
58 cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
60 quiet_cmd_copy_zliblinuxheader = COPY $@
61 cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
63 $(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
66 $(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
67 $(call cmd,copy_zlibheader)
69 $(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
70 $(call cmd,copy_zliblinuxheader)
75 $(obj)/zImage.lds $(obj)/zImage.coff.lds: $(obj)/%: $(srctree)/$(src)/%.S
78 clean-files := $(zlib) $(zlibheader) $(zliblinuxheader) \
79 empty.c zImage.coff.lds zImage.lds
81 quiet_cmd_bootcc = BOOTCC $@
82 cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
84 quiet_cmd_bootas = BOOTAS $@
85 cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
87 quiet_cmd_bootar = BOOTAR $@
88 cmd_bootar = $(CROSS32AR) -cr $@.$$$$ $(filter-out FORCE,$^); mv $@.$$$$ $@
90 $(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c FORCE
91 $(call if_changed_dep,bootcc)
92 $(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S FORCE
93 $(call if_changed_dep,bootas)
95 $(obj)/wrapper.a: $(obj-wlib) FORCE
96 $(call if_changed,bootar)
98 hostprogs-y := addnote addRamDisk hack-coff mktree
100 targets += $(patsubst $(obj)/%,%,$(obj-boot) wrapper.a)
101 extra-y := $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \
102 $(obj)/zImage.lds $(obj)/zImage.coff.lds
104 wrapper :=$(srctree)/$(src)/wrapper
105 wrapperbits := $(extra-y) $(addprefix $(obj)/,addnote hack-coff mktree) \
109 # Bits for building various flavours of zImage
111 ifneq ($(CROSS32_COMPILE),)
112 CROSSWRAP := -C "$(CROSS32_COMPILE)"
114 ifneq ($(CROSS_COMPILE),)
115 CROSSWRAP := -C "$(CROSS_COMPILE)"
119 # args (to if_changed): 1 = (this rule), 2 = platform, 3 = dts 4=dtb 5=initrd
120 quiet_cmd_wrap = WRAP $@
121 cmd_wrap =$(CONFIG_SHELL) $(wrapper) -c -o $@ -p $2 $(CROSSWRAP) \
122 $(if $3, -s $3)$(if $4, -d $4)$(if $5, -i $5) vmlinux
124 image-$(CONFIG_PPC_PSERIES) += zImage.pseries
125 image-$(CONFIG_PPC_MAPLE) += zImage.pseries
126 image-$(CONFIG_PPC_IBM_CELL_BLADE) += zImage.pseries
127 image-$(CONFIG_PPC_PS3) += zImage.ps3
128 image-$(CONFIG_PPC_CELLEB) += zImage.pseries
129 image-$(CONFIG_PPC_CHRP) += zImage.chrp
130 image-$(CONFIG_PPC_EFIKA) += zImage.chrp
131 image-$(CONFIG_PPC_PMAC) += zImage.pmac
132 image-$(CONFIG_DEFAULT_UIMAGE) += uImage cuImage
134 # For 32-bit powermacs, build the COFF and miboot images
135 # as well as the ELF images.
136 ifeq ($(CONFIG_PPC32),y)
137 image-$(CONFIG_PPC_PMAC) += zImage.coff zImage.miboot
140 initrd- := $(patsubst zImage%, zImage.initrd%, $(image-n) $(image-))
141 initrd-y := $(patsubst zImage%, zImage.initrd%, $(image-y))
142 initrd-y := $(filter-out $(image-y), $(initrd-y))
143 targets += $(image-y) $(initrd-y)
145 $(addprefix $(obj)/, $(initrd-y)): $(obj)/ramdisk.image.gz
147 # Don't put the ramdisk on the pattern rule; when its missing make will try
148 # the pattern rule with less dependencies that also matches (even with the
149 # hard dependency listed).
150 $(obj)/zImage.initrd.%: vmlinux $(wrapperbits)
151 $(call if_changed,wrap,$*,,,$(obj)/ramdisk.image.gz)
153 $(obj)/zImage.%: vmlinux $(wrapperbits)
154 $(call if_changed,wrap,$*)
156 $(obj)/zImage.ps3: vmlinux
157 $(STRIP) -s -R .comment $< -o $@
159 $(obj)/zImage.initrd.ps3: vmlinux
160 @echo " WARNING zImage.initrd.ps3 not supported (yet)"
162 $(obj)/uImage: vmlinux $(wrapperbits)
163 $(call if_changed,wrap,uboot)
165 cuboot-plat-y += unknown-platform
167 dts = $(if $(shell echo $(CONFIG_) | grep '^/'),\
168 ,$(srctree)/$(src)/dts/)$(CONFIG_DEVICE_TREE)
170 $(obj)/cuImage: vmlinux $(wrapperbits)
171 $(call if_changed,wrap,cuboot-$(word 1,$(cuboot-plat-y)),$(dts))
173 $(obj)/zImage: $(addprefix $(obj)/, $(image-y))
175 $(obj)/zImage.initrd: $(addprefix $(obj)/, $(initrd-y))
178 install: $(CONFIGURE) $(image-y)
179 sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" $<
181 # anything not in $(targets)
182 clean-files += $(image-) $(initrd-) zImage zImage.initrd \
183 cuImage.elf cuImage.bin.gz
185 # clean up files cached by wrapper
186 clean-kernel := vmlinux.strip vmlinux.bin
187 clean-kernel += $(addsuffix .gz,$(clean-kernel))
188 # If not absolute clean-files are relative to $(obj).
189 clean-files += $(addprefix $(objtree)/, $(clean-kernel))