arch/powerpc/boot/Makefile

   1 # Makefile for making ELF bootable images for booting on CHRP
   2 # using Open Firmware.
   3 #
   4 # Geert Uytterhoeven    September 1997
   5 #
   6 # Based on coffboot by Paul Mackerras
   7 # Simplified for ppc64 by Todd Inglett
   8 #
   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.
  12 #
  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.
  22
  23
  24 HOSTCC          := gcc
  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
  30
  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
  34
  35 $(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
  36 #$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)
  37
  38 src-boot := string.S prom.c main.c div64.S crt0.S
  39 src-boot += $(zlib)
  40 src-boot := $(addprefix $(obj)/, $(src-boot))
  41 obj-boot := $(addsuffix .o, $(basename $(src-boot)))
  42
  43 BOOTCFLAGS      += -I$(obj) -I$(srctree)/$(obj)
  44
  45 quiet_cmd_copy_zlib = COPY    $@
  46       cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
  47
  48 quiet_cmd_copy_zlibheader = COPY    $@
  49       cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
  50 # stddef.h for NULL
  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\"@" $< > $@
  53
  54 $(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
  55         $(call cmd,copy_zlib)
  56
  57 $(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
  58         $(call cmd,copy_zlibheader)
  59
  60 $(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
  61         $(call cmd,copy_zliblinuxheader)
  62
  63 clean-files := $(zlib) $(zlibheader) $(zliblinuxheader)
  64
  65
  66 quiet_cmd_bootcc = BOOTCC  $@
  67       cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
  68
  69 quiet_cmd_bootas = BOOTAS  $@
  70       cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
  71
  72 quiet_cmd_bootld = BOOTLD  $@
  73       cmd_bootld = $(CROSS32LD) $(BOOTLFLAGS) -o $@ $(2)
  74
  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)
  79
  80 #-----------------------------------------------------------
  81 # ELF sections within the zImage bootloader/wrapper
  82 #-----------------------------------------------------------
  83 required := vmlinux.strip
  84 initrd   := initrd
  85
  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)))
  89
  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))) \
  95                            vmlinux.initrd
  96 extra-y                 := initrd.o
  97
  98 quiet_cmd_ramdisk = RAMDISK $@
  99       cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@
 100
 101 quiet_cmd_stripvm = STRIP   $@
 102       cmd_stripvm = $(STRIP) -s -R .comment $< -o $@
 103
 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)
 108
 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)
 113
 114 quiet_cmd_addnote = ADDNOTE $@
 115       cmd_addnote = $(obj)/addnote $@
 116
 117 $(call gz-sec, $(required)): $(obj)/kernel-%.gz: %
 118         $(call if_changed,gzip)
 119
 120 $(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz
 121         cp -f $(obj)/ramdisk.image.gz $@
 122
 123 $(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz
 124         @touch $@
 125
 126 $(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c
 127         $(call if_changed_dep,bootcc)
 128         $(call cmd,addsection)
 129
 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))
 133
 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))
 137
 138 $(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote
 139         @cp -f $< $@
 140         $(call if_changed,addnote)
 141
 142 $(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote
 143         @cp -f $< $@
 144         $(call if_changed,addnote)
 145
 146 #-----------------------------------------------------------
 147 # build u-boot images
 148 #-----------------------------------------------------------
 149 quiet_cmd_mygzip = GZIP $@
 150 cmd_mygzip = gzip -f -9 < $< > $@.$$$$ && mv $@.$$$$ $@
 151
 152 quiet_cmd_objbin = OBJCOPY $@
 153       cmd_objbin = $(OBJCOPY) -O binary $< $@
 154
 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)' \
 158                -d $< $@
 159
 160 MKIMAGE         := $(srctree)/scripts/mkuboot.sh
 161 targets         += uImage
 162 extra-y         += vmlinux.bin vmlinux.gz
 163
 164 $(obj)/vmlinux.bin: vmlinux FORCE
 165         $(call if_changed,objbin)
 166
 167 $(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE
 168         $(call if_changed,mygzip)
 169
 170 $(obj)/uImage: $(obj)/vmlinux.gz
 171         $(Q)rm -f $@
 172         $(call cmd,uimage)
 173         @echo -n '  Image: $@ '
 174         @if [ -f $@ ]; then echo 'is ready' ; else echo 'not made'; fi
 175
 176 install: $(CONFIGURE) $(BOOTIMAGE)
 177         sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)"
 178
 179 clean-files := $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip)