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 BOOTLFLAGS := -T $(srctree)/$(src)/zImage.lds
29 OBJCOPYFLAGS := contents,alloc,load,readonly,data
31 zlib := infblock.c infcodes.c inffast.c inflate.c inftrees.c infutil.c
32 zlibheader := infblock.h infcodes.h inffast.h inftrees.h infutil.h
33 zliblinuxheader := zlib.h zconf.h zutil.h
35 $(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
36 #$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)
38 src-boot := string.S prom.c main.c div64.S crt0.S
40 src-boot := $(addprefix $(obj)/, $(src-boot))
41 obj-boot := $(addsuffix .o, $(basename $(src-boot)))
43 BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj)
45 quiet_cmd_copy_zlib = COPY $@
46 cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
48 quiet_cmd_copy_zlibheader = COPY $@
49 cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
51 quiet_cmd_copy_zliblinuxheader = COPY $@
52 cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
54 $(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
57 $(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
58 $(call cmd,copy_zlibheader)
60 $(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
61 $(call cmd,copy_zliblinuxheader)
63 clean-files := $(zlib) $(zlibheader) $(zliblinuxheader)
66 quiet_cmd_bootcc = BOOTCC $@
67 cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
69 quiet_cmd_bootas = BOOTAS $@
70 cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
72 quiet_cmd_bootld = BOOTLD $@
73 cmd_bootld = $(CROSS32LD) $(BOOTLFLAGS) -o $@ $(2)
75 $(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c
76 $(call if_changed_dep,bootcc)
77 $(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S
78 $(call if_changed_dep,bootas)
80 #-----------------------------------------------------------
81 # ELF sections within the zImage bootloader/wrapper
82 #-----------------------------------------------------------
83 required := vmlinux.strip
86 obj-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.o, $(section)))
87 src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section)))
88 gz-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section)))
90 hostprogs-y := addnote addRamDisk
91 targets += zImage.vmode zImage.initrd.vmode zImage zImage.initrd \
92 $(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd))) \
93 $(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd))) \
94 $(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd))) \
98 quiet_cmd_ramdisk = RAMDISK $@
99 cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@
101 quiet_cmd_stripvm = STRIP $@
102 cmd_stripvm = $(STRIP) -s -R .comment $< -o $@
104 vmlinux.strip: vmlinux
105 $(call if_changed,stripvm)
106 $(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz
107 $(call if_changed,ramdisk)
109 quiet_cmd_addsection = ADDSEC $@
110 cmd_addsection = $(CROSS32OBJCOPY) $@ \
111 --add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(patsubst %.o,%.gz, $@) \
112 --set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(OBJCOPYFLAGS)
114 quiet_cmd_addnote = ADDNOTE $@
115 cmd_addnote = $(obj)/addnote $@
117 $(call gz-sec, $(required)): $(obj)/kernel-%.gz: %
118 $(call if_changed,gzip)
120 $(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz
121 cp -f $(obj)/ramdisk.image.gz $@
123 $(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz
126 $(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c
127 $(call if_changed_dep,bootcc)
128 $(call cmd,addsection)
130 $(obj)/zImage.vmode: obj-boot += $(call obj-sec, $(required))
131 $(obj)/zImage.vmode: $(call obj-sec, $(required)) $(obj-boot) $(srctree)/$(src)/zImage.lds
132 $(call cmd,bootld,$(obj-boot))
134 $(obj)/zImage.initrd.vmode: obj-boot += $(call obj-sec, $(required) $(initrd))
135 $(obj)/zImage.initrd.vmode: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(srctree)/$(src)/zImage.lds
136 $(call cmd,bootld,$(obj-boot))
138 $(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote
140 $(call if_changed,addnote)
142 $(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote
144 $(call if_changed,addnote)
146 #-----------------------------------------------------------
147 # build u-boot images
148 #-----------------------------------------------------------
149 quiet_cmd_mygzip = GZIP $@
150 cmd_mygzip = gzip -f -9 < $< > $@.$$$$ && mv $@.$$$$ $@
152 quiet_cmd_objbin = OBJCOPY $@
153 cmd_objbin = $(OBJCOPY) -O binary $< $@
155 quiet_cmd_uimage = UIMAGE $@
156 cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A ppc -O linux -T kernel \
157 -C gzip -a 00000000 -e 00000000 -n 'Linux-$(KERNELRELEASE)' \
160 MKIMAGE := $(srctree)/scripts/mkuboot.sh
162 extra-y += vmlinux.bin vmlinux.gz
164 $(obj)/vmlinux.bin: vmlinux FORCE
165 $(call if_changed,objbin)
167 $(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE
168 $(call if_changed,mygzip)
170 $(obj)/uImage: $(obj)/vmlinux.gz
173 @echo -n ' Image: $@ '
174 @if [ -f $@ ]; then echo 'is ready' ; else echo 'not made'; fi
176 install: $(CONFIGURE) $(BOOTIMAGE)
177 sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)"
179 clean-files += $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip)