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)