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 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
  31
  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
  35
  36 $(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
  37 #$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)
  38
  39 src-boot := crt0.S string.S prom.c stdio.c main.c div64.S
  40 src-boot += $(zlib)
  41 src-boot := $(addprefix $(obj)/, $(src-boot))
  42 obj-boot := $(addsuffix .o, $(basename $(src-boot)))
  43
  44 BOOTCFLAGS      += -I$(obj) -I$(srctree)/$(obj)
  45
  46 quiet_cmd_copy_zlib = COPY    $@
  47       cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
  48
  49 quiet_cmd_copy_zlibheader = COPY    $@
  50       cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
  51 # stddef.h for NULL
  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\"@" $< > $@
  54
  55 $(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
  56         $(call cmd,copy_zlib)
  57
  58 $(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
  59         $(call cmd,copy_zlibheader)
  60
  61 $(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
  62         $(call cmd,copy_zliblinuxheader)
  63
  64 clean-files := $(zlib) $(zlibheader) $(zliblinuxheader)
  65
  66
  67 quiet_cmd_bootcc = BOOTCC  $@
  68       cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
  69
  70 quiet_cmd_bootas = BOOTAS  $@
  71       cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
  72
  73 quiet_cmd_bootld = BOOTLD  $@
  74       cmd_bootld = $(CROSS32LD) -T $(srctree)/$(src)/$(3) -o $@ $(2)
  75
  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)
  80
  81 #-----------------------------------------------------------
  82 # ELF sections within the zImage bootloader/wrapper
  83 #-----------------------------------------------------------
  84 required := vmlinux.strip
  85 initrd   := initrd
  86
  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)))
  90
  91 hostprogs-y             := addnote addRamDisk hack-coff
  92
  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
  99 extra-y                 := initrd.o
 100
 101 quiet_cmd_ramdisk = RAMDISK $@
 102       cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@
 103
 104 quiet_cmd_stripvm = STRIP   $@
 105       cmd_stripvm = $(STRIP) -s -R .comment $< -o $@
 106
 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)
 111
 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)
 116
 117 quiet_cmd_addnote = ADDNOTE $@
 118       cmd_addnote = $(obj)/addnote $@
 119
 120 quiet_cmd_gen-miboot = GEN     $@
 121       cmd_gen-miboot = $(OBJCOPY) $(OBJCOPY_MIB_ARGS) \
 122                        --add-section=$1=$(word 2, $^) $< $@
 123
 124 quiet_cmd_gencoff = COFF    $@
 125       cmd_gencoff = $(OBJCOPY) $(OBJCOPY_COFF_ARGS) $@ && \
 126                     $(obj)/hack-coff $@
 127
 128 $(call gz-sec, $(required)): $(obj)/kernel-%.gz: %
 129         $(call if_changed,gzip)
 130
 131 $(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz
 132         cp -f $(obj)/ramdisk.image.gz $@
 133
 134 $(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz
 135         @touch $@
 136
 137 $(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c
 138         $(call if_changed_dep,bootcc)
 139         $(call cmd,addsection)
 140
 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)
 144
 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)
 148
 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
 155
 156 $(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote $(coffimage-y-y) \
 157                         $(mibootimg-y-y)
 158         @cp -f $< $@
 159         $(call if_changed,addnote)
 160
 161 $(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote \
 162                         $(coffrdimg-y-y) $(mibrdimg-y-y)
 163         @cp -f $< $@
 164         $(call if_changed,addnote)
 165
 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)
 169         $(call cmd,gencoff)
 170
 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)
 174         $(call cmd,gencoff)
 175
 176 $(obj)/miboot.image: $(obj)/dummy.o $(obj)/vmlinux.gz
 177         $(call cmd,gen-miboot,image)
 178
 179 $(obj)/miboot.initrd.image: $(obj)/miboot.image $(images)/ramdisk.image.gz
 180         $(call cmd,gen-miboot,initrd)
 181
 182 #-----------------------------------------------------------
 183 # build u-boot images
 184 #-----------------------------------------------------------
 185 quiet_cmd_mygzip = GZIP $@
 186 cmd_mygzip = gzip -f -9 < $< > $@.$$$$ && mv $@.$$$$ $@
 187
 188 quiet_cmd_objbin = OBJCOPY $@
 189       cmd_objbin = $(OBJCOPY) -O binary $< $@
 190
 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)' \
 194                -d $< $@
 195
 196 MKIMAGE         := $(srctree)/scripts/mkuboot.sh
 197 targets         += uImage
 198 extra-y         += vmlinux.bin vmlinux.gz
 199
 200 $(obj)/vmlinux.bin: vmlinux FORCE
 201         $(call if_changed,objbin)
 202
 203 $(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE
 204         $(call if_changed,mygzip)
 205
 206 $(obj)/uImage: $(obj)/vmlinux.gz
 207         $(Q)rm -f $@
 208         $(call cmd,uimage)
 209         @echo -n '  Image: $@ '
 210         @if [ -f $@ ]; then echo 'is ready' ; else echo 'not made'; fi
 211
 212 install: $(CONFIGURE) $(BOOTIMAGE)
 213         sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)"
 214
 215 clean-files += $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip)