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 stdio.c main.c div64.S $(zlib)
  44 src-plat := of.c
  45 src-boot := crt0.S $(src-wlib) $(src-plat) empty.c
  46
  47 src-boot := $(addprefix $(obj)/, $(src-boot))
  48 obj-boot := $(addsuffix .o, $(basename $(src-boot)))
  49 obj-wlib := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-wlib))))
  50 obj-plat := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-plat))))
  51
  52 quiet_cmd_copy_zlib = COPY    $@
  53       cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
  54
  55 quiet_cmd_copy_zlibheader = COPY    $@
  56       cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
  57 # stddef.h for NULL
  58 quiet_cmd_copy_zliblinuxheader = COPY    $@
  59       cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
  60
  61 $(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
  62         $(call cmd,copy_zlib)
  63
  64 $(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
  65         $(call cmd,copy_zlibheader)
  66
  67 $(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
  68         $(call cmd,copy_zliblinuxheader)
  69
  70 $(obj)/empty.c:
  71         @touch $@
  72
  73 $(obj)/zImage.lds $(obj)/zImage.coff.lds: $(obj)/%: $(srctree)/$(src)/%.S
  74         @cp $< $@
  75
  76 clean-files := $(zlib) $(zlibheader) $(zliblinuxheader) \
  77                 $(obj)/empty.c
  78
  79 quiet_cmd_bootcc = BOOTCC  $@
  80       cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
  81
  82 quiet_cmd_bootas = BOOTAS  $@
  83       cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
  84
  85 quiet_cmd_bootar = BOOTAR  $@
  86       cmd_bootar = $(CROSS32AR) -cr $@.$$$$ $^; mv $@.$$$$ $@
  87
  88 $(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c
  89         $(call if_changed_dep,bootcc)
  90 $(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S
  91         $(call if_changed_dep,bootas)
  92
  93 $(obj)/wrapper.a: $(obj-wlib)
  94         $(call cmd,bootar)
  95
  96 hostprogs-y     := addnote addRamDisk hack-coff
  97
  98 extra-y         := $(obj)/crt0.o $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \
  99                    $(obj)/zImage.lds $(obj)/zImage.coff.lds
 100
 101 wrapper         :=$(srctree)/$(src)/wrapper
 102 wrapperbits     := $(extra-y) $(addprefix $(obj)/,addnote hack-coff)
 103
 104 #############
 105 # Bits for building various flavours of zImage
 106
 107 ifneq ($(CROSS32_COMPILE),)
 108 CROSSWRAP := -C "$(CROSS32_COMPILE)"
 109 else
 110 ifneq ($(CROSS_COMPILE),)
 111 CROSSWRAP := -C "$(CROSS_COMPILE)"
 112 endif
 113 endif
 114
 115 quiet_cmd_wrap  = WRAP    $@
 116       cmd_wrap  =$(CONFIG_SHELL) $(wrapper) -c -o $@ -p $2 $(CROSSWRAP) vmlinux
 117 quiet_cmd_wrap_initrd = WRAP    $@
 118       cmd_wrap_initrd =$(CONFIG_SHELL) $(wrapper) -c -o $@ -p $2 $(CROSSWRAP) \
 119                                 -i $(obj)/ramdisk.image.gz vmlinux
 120
 121 $(obj)/zImage.chrp: vmlinux $(wrapperbits)
 122         $(call cmd,wrap,chrp)
 123
 124 $(obj)/zImage.initrd.chrp: vmlinux $(wrapperbits)
 125         $(call cmd,wrap_initrd,chrp)
 126
 127 $(obj)/zImage.pseries:  vmlinux $(wrapperbits)
 128         $(call cmd,wrap,pseries)
 129
 130 $(obj)/zImage.initrd.pseries: vmlinux $(wrapperbits)
 131         $(call cmd,wrap_initrd,pseries)
 132
 133 $(obj)/zImage.pmac: vmlinux $(wrapperbits)
 134         $(call cmd,wrap,pmac)
 135
 136 $(obj)/zImage.initrd.pmac: vmlinux $(wrapperbits)
 137         $(call cmd,wrap_initrd,pmac)
 138
 139 $(obj)/zImage.coff: vmlinux $(wrapperbits)
 140         $(call cmd,wrap,pmaccoff)
 141
 142 $(obj)/zImage.initrd.coff: vmlinux $(wrapperbits)
 143         $(call cmd,wrap_initrd,pmaccoff)
 144
 145 $(obj)/zImage.miboot: vmlinux $(wrapperbits)
 146         $(call cmd,wrap,miboot)
 147
 148 $(obj)/zImage.initrd.miboot: vmlinux $(wrapperbits)
 149         $(call cmd,wrap_initrd,miboot)
 150
 151 $(obj)/uImage: vmlinux $(wrapperbits)
 152         $(call cmd,wrap,uboot)
 153
 154 image-$(CONFIG_PPC_PSERIES)             += zImage.pseries
 155 image-$(CONFIG_PPC_MAPLE)               += zImage.pseries
 156 image-$(CONFIG_PPC_IBM_CELL_BLADE)      += zImage.pseries
 157 image-$(CONFIG_PPC_CHRP)                += zImage.chrp
 158 image-$(CONFIG_PPC_PMAC)                += zImage.pmac
 159 image-$(CONFIG_DEFAULT_UIMAGE)          += uImage
 160
 161 # For 32-bit powermacs, build the COFF and miboot images
 162 # as well as the ELF images.
 163 ifeq ($(CONFIG_PPC32),y)
 164 image-$(CONFIG_PPC_PMAC)        += zImage.coff zImage.miboot
 165 endif
 166
 167 initrd-y := $(patsubst zImage%, zImage.initrd%, $(image-y))
 168
 169 $(obj)/zImage:          $(addprefix $(obj)/, $(image-y))
 170         @rm -f $@; ln $< $@
 171 $(obj)/zImage.initrd:   $(addprefix $(obj)/, $(initrd-y))
 172         @rm -f $@; ln $< $@
 173
 174 install: $(CONFIGURE) $(image-y)
 175         sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" $<
 176
 177 clean-files += $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip.gz)
 178 clean-files += $(addprefix $(objtree)/, $(obj-boot) vmlinux.bin.gz)