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 23all: $(obj)/zImage 24 25HOSTCC := gcc 26BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \ 27 $(shell $(CROSS32CC) -print-file-name=include) -fPIC 28BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc 29 30ifeq ($(call cc-option-yn, -fstack-protector),y) 31BOOTCFLAGS += -fno-stack-protector 32endif 33 34BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj) 35 36zlib := inffast.c inflate.c inftrees.c 37zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h 38zliblinuxheader := zlib.h zconf.h zutil.h 39 40$(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) \ 41 $(addprefix $(obj)/,$(zlibheader)) 42 43src-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 46src-plat := of.c cuboot-83xx.c cuboot-85xx.c 47src-boot := $(src-wlib) $(src-plat) empty.c 48 49src-boot := $(addprefix $(obj)/, $(src-boot)) 50obj-boot := $(addsuffix .o, $(basename $(src-boot))) 51obj-wlib := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-wlib)))) 52obj-plat := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-plat)))) 53 54quiet_cmd_copy_zlib = COPY $@ 55 cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@ 56 57quiet_cmd_copy_zlibheader = COPY $@ 58 cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@ 59# stddef.h for NULL 60quiet_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 78clean-files := $(zlib) $(zlibheader) $(zliblinuxheader) \ 79 empty.c zImage.coff.lds zImage.lds 80 81quiet_cmd_bootcc = BOOTCC $@ 82 cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $< 83 84quiet_cmd_bootas = BOOTAS $@ 85 cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $< 86 87quiet_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 98hostprogs-y := addnote addRamDisk hack-coff mktree 99 100targets += $(patsubst $(obj)/%,%,$(obj-boot) wrapper.a) 101extra-y := $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \ 102 $(obj)/zImage.lds $(obj)/zImage.coff.lds 103 104wrapper :=$(srctree)/$(src)/wrapper 105wrapperbits := $(extra-y) $(addprefix $(obj)/,addnote hack-coff mktree) \ 106 $(wrapper) FORCE 107 108############# 109# Bits for building various flavours of zImage 110 111ifneq ($(CROSS32_COMPILE),) 112CROSSWRAP := -C "$(CROSS32_COMPILE)" 113else 114ifneq ($(CROSS_COMPILE),) 115CROSSWRAP := -C "$(CROSS_COMPILE)" 116endif 117endif 118 119# args (to if_changed): 1 = (this rule), 2 = platform, 3 = dts 4=dtb 5=initrd 120quiet_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 $5) vmlinux 123 124image-$(CONFIG_PPC_PSERIES) += zImage.pseries 125image-$(CONFIG_PPC_MAPLE) += zImage.pseries 126image-$(CONFIG_PPC_IBM_CELL_BLADE) += zImage.pseries 127image-$(CONFIG_PPC_PS3) += zImage.ps3 128image-$(CONFIG_PPC_CELLEB) += zImage.pseries 129image-$(CONFIG_PPC_CHRP) += zImage.chrp 130image-$(CONFIG_PPC_EFIKA) += zImage.chrp 131image-$(CONFIG_PPC_PMAC) += zImage.pmac 132image-$(CONFIG_DEFAULT_UIMAGE) += uImage cuImage 133 134# For 32-bit powermacs, build the COFF and miboot images 135# as well as the ELF images. 136ifeq ($(CONFIG_PPC32),y) 137image-$(CONFIG_PPC_PMAC) += zImage.coff zImage.miboot 138endif 139 140initrd- := $(patsubst zImage%, zImage.initrd%, $(image-n) $(image-)) 141initrd-y := $(patsubst zImage%, zImage.initrd%, $(image-y)) 142initrd-y := $(filter-out $(image-y), $(initrd-y)) 143targets += $(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 $(call if_changed,wrap,uboot) 164 165cuboot-plat-$(CONFIG_83xx) += 83xx 166cuboot-plat-$(CONFIG_85xx) += 85xx 167cuboot-plat-y += unknown-platform 168 169dts = $(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 180install: $(CONFIGURE) $(addprefix $(obj)/, $(image-y)) 181 sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" $< 182 183# anything not in $(targets) 184clean-files += $(image-) $(initrd-) zImage zImage.initrd \ 185 cuImage.elf cuImage.bin.gz 186 187# clean up files cached by wrapper 188clean-kernel := vmlinux.strip vmlinux.bin 189clean-kernel += $(addsuffix .gz,$(clean-kernel)) 190# If not absolute clean-files are relative to $(obj). 191clean-files += $(addprefix $(objtree)/, $(clean-kernel)) 192