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.
25 BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \
26 $(shell $(CROSS32CC) -print-file-name=include) -fPIC
27 BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
28 OBJCOPYFLAGS := contents,alloc,load,readonly,data
29 OBJCOPY_COFF_ARGS := -O aixcoff-rs6000 --set-start 0x500000
30 OBJCOPY_MIB_ARGS := -O aixcoff-rs6000 -R .stab -R .stabstr -R .comment
32 zlib := infblock.c infcodes.c inffast.c inflate.c inftrees.c infutil.c
33 zlibheader := infblock.h infcodes.h inffast.h inftrees.h infutil.h
34 zliblinuxheader := zlib.h zconf.h zutil.h
36 $(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
37 #$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)
39 src-boot := crt0.S string.S prom.c stdio.c main.c div64.S
41 src-boot := $(addprefix $(obj)/, $(src-boot))
42 obj-boot := $(addsuffix .o, $(basename $(src-boot)))
44 BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj)
46 quiet_cmd_copy_zlib = COPY $@
47 cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
49 quiet_cmd_copy_zlibheader = COPY $@
50 cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
52 quiet_cmd_copy_zliblinuxheader = COPY $@
53 cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
55 $(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
58 $(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
59 $(call cmd,copy_zlibheader)
61 $(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
62 $(call cmd,copy_zliblinuxheader)
64 clean-files := $(zlib) $(zlibheader) $(zliblinuxheader)
67 quiet_cmd_bootcc = BOOTCC $@
68 cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
70 quiet_cmd_bootas = BOOTAS $@
71 cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
73 quiet_cmd_bootld = BOOTLD $@
74 cmd_bootld = $(CROSS32LD) -T $(srctree)/$(src)/$(3) -o $@ $(2)
76 $(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c
77 $(call if_changed_dep,bootcc)
78 $(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S
79 $(call if_changed_dep,bootas)
81 #-----------------------------------------------------------
82 # ELF sections within the zImage bootloader/wrapper
83 #-----------------------------------------------------------
84 required := vmlinux.strip
87 obj-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.o, $(section)))
88 src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section)))
89 gz-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section)))
91 hostprogs-y := addnote addRamDisk hack-coff
93 targets += zImage.vmode zImage.initrd.vmode zImage zImage.initrd \
94 zImage.coff zImage.initrd.coff miboot.image miboot.initrd.image \
95 $(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd))) \
96 $(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd))) \
97 $(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd))) \
98 vmlinux.initrd dummy.o
101 quiet_cmd_ramdisk = RAMDISK $@
102 cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@
104 quiet_cmd_stripvm = STRIP $@
105 cmd_stripvm = $(STRIP) -s -R .comment $< -o $@
107 vmlinux.strip: vmlinux
108 $(call if_changed,stripvm)
109 $(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz
110 $(call if_changed,ramdisk)
112 quiet_cmd_addsection = ADDSEC $@
113 cmd_addsection = $(CROSS32OBJCOPY) $@ \
114 --add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(patsubst %.o,%.gz, $@) \
115 --set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(OBJCOPYFLAGS)
117 quiet_cmd_addnote = ADDNOTE $@
118 cmd_addnote = $(obj)/addnote $@
120 quiet_cmd_gen-miboot = GEN $@
121 cmd_gen-miboot = $(OBJCOPY) $(OBJCOPY_MIB_ARGS) \
122 --add-section=$1=$(word 2, $^) $< $@
124 quiet_cmd_gencoff = COFF $@
125 cmd_gencoff = $(OBJCOPY) $(OBJCOPY_COFF_ARGS) $@ && \
128 $(call gz-sec, $(required)): $(obj)/kernel-%.gz: %
129 $(call if_changed,gzip)
131 $(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz
132 cp -f $(obj)/ramdisk.image.gz $@
134 $(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz
137 $(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c
138 $(call if_changed_dep,bootcc)
139 $(call cmd,addsection)
141 $(obj)/zImage.vmode $(obj)/zImage.coff: obj-boot += $(call obj-sec, $(required))
142 $(obj)/zImage.vmode: $(call obj-sec, $(required)) $(obj-boot) $(srctree)/$(src)/zImage.lds
143 $(call cmd,bootld,$(obj-boot),zImage.lds)
145 $(obj)/zImage.initrd.vmode $(obj)/zImage.initrd.coff: obj-boot += $(call obj-sec, $(required) $(initrd))
146 $(obj)/zImage.initrd.vmode: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(srctree)/$(src)/zImage.lds
147 $(call cmd,bootld,$(obj-boot),zImage.lds)
149 # For 32-bit powermacs, build the COFF and miboot images
150 # as well as the ELF images.
151 coffimage-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.coff
152 coffrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.initrd.coff
153 mibootimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/miboot.image
154 mibrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/miboot.initrd.image
156 $(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote $(coffimage-y-y) \
159 $(call if_changed,addnote)
161 $(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote \
162 $(coffrdimg-y-y) $(mibrdimg-y-y)
164 $(call if_changed,addnote)
166 $(obj)/zImage.coff: $(call obj-sec, $(required)) $(obj-boot) \
167 $(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff
168 $(call cmd,bootld,$(obj-boot),zImage.coff.lds)
171 $(obj)/zImage.initrd.coff: $(call obj-sec, $(required) $(initrd)) $(obj-boot) \
172 $(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff
173 $(call cmd,bootld,$(obj-boot),zImage.coff.lds)
176 $(obj)/miboot.image: $(obj)/dummy.o $(obj)/vmlinux.gz
177 $(call cmd,gen-miboot,image)
179 $(obj)/miboot.initrd.image: $(obj)/miboot.image $(images)/ramdisk.image.gz
180 $(call cmd,gen-miboot,initrd)
182 #-----------------------------------------------------------
183 # build u-boot images
184 #-----------------------------------------------------------
185 quiet_cmd_mygzip = GZIP $@
186 cmd_mygzip = gzip -f -9 < $< > $@.$$$$ && mv $@.$$$$ $@
188 quiet_cmd_objbin = OBJCOPY $@
189 cmd_objbin = $(OBJCOPY) -O binary $< $@
191 quiet_cmd_uimage = UIMAGE $@
192 cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A ppc -O linux -T kernel \
193 -C gzip -a 00000000 -e 00000000 -n 'Linux-$(KERNELRELEASE)' \
196 MKIMAGE := $(srctree)/scripts/mkuboot.sh
198 extra-y += vmlinux.bin vmlinux.gz
200 $(obj)/vmlinux.bin: vmlinux FORCE
201 $(call if_changed,objbin)
203 $(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE
204 $(call if_changed,mygzip)
206 $(obj)/uImage: $(obj)/vmlinux.gz
209 @echo -n ' Image: $@ '
210 @if [ -f $@ ]; then echo 'is ready' ; else echo 'not made'; fi
212 install: $(CONFIGURE) $(BOOTIMAGE)
213 sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)"
215 clean-files += $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip)