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 all: $(obj)/zImage
  24
  25 HOSTCC          := gcc
  26 BOOTCFLAGS      := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \
  27                    $(shell $(CROSS32CC) -print-file-name=include) -fPIC
  28 BOOTAFLAGS      := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
  29
  30 ifeq ($(call cc-option-yn, -fstack-protector),y)
  31 BOOTCFLAGS      += -fno-stack-protector
  32 endif
  33
  34 BOOTCFLAGS      += -I$(obj) -I$(srctree)/$(obj)
  35
  36 zlib       := inffast.c inflate.c inftrees.c
  37 zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h
  38 zliblinuxheader := zlib.h zconf.h zutil.h
  39
  40 $(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) \
  41                 $(addprefix $(obj)/,$(zlibheader))
  42
  43 src-wlib := string.S crt0.S stdio.c main.c flatdevtree.c flatdevtree_misc.c \
  44                 ns16550.c serial.c simple_alloc.c div64.S util.S \
  45                 gunzip_util.c elf_util.c $(zlib) devtree.c
  46 src-plat := of.c cuboot-83xx.c cuboot-85xx.c
  47 src-boot := $(src-wlib) $(src-plat) empty.c
  48
  49 src-boot := $(addprefix $(obj)/, $(src-boot))
  50 obj-boot := $(addsuffix .o, $(basename $(src-boot)))
  51 obj-wlib := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-wlib))))
  52 obj-plat := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-plat))))
  53
  54 quiet_cmd_copy_zlib = COPY    $@
  55       cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
  56
  57 quiet_cmd_copy_zlibheader = COPY    $@
  58       cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
  59 # stddef.h for NULL
  60 quiet_cmd_copy_zliblinuxheader = COPY    $@
  61       cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
  62
  63 $(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
  64         $(call cmd,copy_zlib)
  65
  66 $(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
  67         $(call cmd,copy_zlibheader)
  68
  69 $(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
  70         $(call cmd,copy_zliblinuxheader)
  71
  72 $(obj)/empty.c:
  73         @touch $@
  74
  75 $(obj)/zImage.lds $(obj)/zImage.coff.lds: $(obj)/%: $(srctree)/$(src)/%.S
  76         @cp $< $@
  77
  78 clean-files := $(zlib) $(zlibheader) $(zliblinuxheader) \
  79                 empty.c zImage.coff.lds zImage.lds
  80
  81 quiet_cmd_bootcc = BOOTCC  $@
  82       cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
  83
  84 quiet_cmd_bootas = BOOTAS  $@
  85       cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
  86
  87 quiet_cmd_bootar = BOOTAR  $@
  88       cmd_bootar = $(CROSS32AR) -cr $@.$$$$ $(filter-out FORCE,$^); mv $@.$$$$ $@
  89
  90 $(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c FORCE
  91         $(call if_changed_dep,bootcc)
  92 $(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S FORCE
  93         $(call if_changed_dep,bootas)
  94
  95 $(obj)/wrapper.a: $(obj-wlib) FORCE
  96         $(call if_changed,bootar)
  97
  98 hostprogs-y     := addnote addRamDisk hack-coff mktree
  99
 100 targets         += $(patsubst $(obj)/%,%,$(obj-boot) wrapper.a)
 101 extra-y         := $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \
 102                    $(obj)/zImage.lds $(obj)/zImage.coff.lds
 103
 104 wrapper         :=$(srctree)/$(src)/wrapper
 105 wrapperbits     := $(extra-y) $(addprefix $(obj)/,addnote hack-coff mktree) \
 106                         $(wrapper) FORCE
 107
 108 #############
 109 # Bits for building various flavours of zImage
 110
 111 ifneq ($(CROSS32_COMPILE),)
 112 CROSSWRAP := -C "$(CROSS32_COMPILE)"
 113 else
 114 ifneq ($(CROSS_COMPILE),)
 115 CROSSWRAP := -C "$(CROSS_COMPILE)"
 116 endif
 117 endif
 118
 119 # args (to if_changed): 1 = (this rule), 2 = platform, 3 = dts 4=dtb 5=initrd
 120 quiet_cmd_wrap  = WRAP    $@
 121       cmd_wrap  =$(CONFIG_SHELL) $(wrapper) -c -o $@ -p $2 $(CROSSWRAP) \
 122                 $(if $3, -s $3)$(if $4, -d $4)$(if $5, -i $5) vmlinux
 123
 124 image-$(CONFIG_PPC_PSERIES)             += zImage.pseries
 125 image-$(CONFIG_PPC_MAPLE)               += zImage.pseries
 126 image-$(CONFIG_PPC_IBM_CELL_BLADE)      += zImage.pseries
 127 image-$(CONFIG_PPC_PS3)                 += zImage.ps3
 128 image-$(CONFIG_PPC_CELLEB)              += zImage.pseries
 129 image-$(CONFIG_PPC_CHRP)                += zImage.chrp
 130 image-$(CONFIG_PPC_EFIKA)               += zImage.chrp
 131 image-$(CONFIG_PPC_PMAC)                += zImage.pmac
 132 image-$(CONFIG_DEFAULT_UIMAGE)          += uImage cuImage
 133
 134 # For 32-bit powermacs, build the COFF and miboot images
 135 # as well as the ELF images.
 136 ifeq ($(CONFIG_PPC32),y)
 137 image-$(CONFIG_PPC_PMAC)        += zImage.coff zImage.miboot
 138 endif
 139
 140 initrd-  := $(patsubst zImage%, zImage.initrd%, $(image-n) $(image-))
 141 initrd-y := $(patsubst zImage%, zImage.initrd%, $(image-y))
 142 initrd-y := $(filter-out $(image-y), $(initrd-y))
 143 targets += $(image-y) $(initrd-y)
 144
 145 $(addprefix $(obj)/, $(initrd-y)): $(obj)/ramdisk.image.gz
 146
 147 # Don't put the ramdisk on the pattern rule; when its missing make will try
 148 # the pattern rule with less dependencies that also matches (even with the
 149 # hard dependency listed).
 150 $(obj)/zImage.initrd.%: vmlinux $(wrapperbits)
 151         $(call if_changed,wrap,$*,,,$(obj)/ramdisk.image.gz)
 152
 153 $(obj)/zImage.%: vmlinux $(wrapperbits)
 154         $(call if_changed,wrap,$*)
 155
 156 $(obj)/zImage.ps3: vmlinux
 157         $(STRIP) -s -R .comment $< -o $@
 158
 159 $(obj)/zImage.initrd.ps3: vmlinux
 160         @echo "  WARNING zImage.initrd.ps3 not supported (yet)"
 161
 162 $(obj)/uImage: vmlinux $(wrapperbits)
 163         $(call if_changed,wrap,uboot)
 164
 165 cuboot-plat-$(CONFIG_83xx) += 83xx
 166 cuboot-plat-$(CONFIG_85xx) += 85xx
 167 cuboot-plat-y += unknown-platform
 168
 169 dts = $(if $(shell echo $(CONFIG_DEVICE_TREE) | grep '^/'),\
 170        ,$(srctree)/$(src)/dts/)$(CONFIG_DEVICE_TREE)
 171
 172 $(obj)/cuImage: vmlinux $(wrapperbits)
 173         $(call if_changed,wrap,cuboot-$(word 1,$(cuboot-plat-y)),$(dts))
 174
 175 $(obj)/zImage:          $(addprefix $(obj)/, $(image-y))
 176         @rm -f $@; ln $< $@
 177 $(obj)/zImage.initrd:   $(addprefix $(obj)/, $(initrd-y))
 178         @rm -f $@; ln $< $@
 179
 180 install: $(CONFIGURE) $(addprefix $(obj)/, $(image-y))
 181         sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" $<
 182
 183 # anything not in $(targets)
 184 clean-files += $(image-) $(initrd-) zImage zImage.initrd \
 185                cuImage.elf cuImage.bin.gz
 186
 187 # clean up files cached by wrapper
 188 clean-kernel := vmlinux.strip vmlinux.bin
 189 clean-kernel += $(addsuffix .gz,$(clean-kernel))
 190 # If not absolute clean-files are relative to $(obj).
 191 clean-files += $(addprefix $(objtree)/, $(clean-kernel))