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 24HOSTCC := gcc 25BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \ 26 $(shell $(CROSS32CC) -print-file-name=include) -fPIC 27BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc 28OBJCOPYFLAGS := contents,alloc,load,readonly,data 29OBJCOPY_COFF_ARGS := -O aixcoff-rs6000 --set-start 0x500000 30OBJCOPY_MIB_ARGS := -O aixcoff-rs6000 -R .stab -R .stabstr -R .comment 31 32zlib := inffast.c inflate.c inftrees.c 33zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h 34zliblinuxheader := zlib.h zconf.h zutil.h 35 36$(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader)) 37#$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h) 38 39src-boot := crt0.S string.S prom.c stdio.c main.c div64.S 40src-boot += $(zlib) 41src-boot := $(addprefix $(obj)/, $(src-boot)) 42obj-boot := $(addsuffix .o, $(basename $(src-boot))) 43 44BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj) 45 46quiet_cmd_copy_zlib = COPY $@ 47 cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@ 48 49quiet_cmd_copy_zlibheader = COPY $@ 50 cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@ 51# stddef.h for NULL 52quiet_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 64clean-files := $(zlib) $(zlibheader) $(zliblinuxheader) 65 66 67quiet_cmd_bootcc = BOOTCC $@ 68 cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $< 69 70quiet_cmd_bootas = BOOTAS $@ 71 cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $< 72 73quiet_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#----------------------------------------------------------- 84required := vmlinux.strip 85initrd := initrd 86 87obj-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.o, $(section))) 88src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section))) 89gz-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section))) 90 91hostprogs-y := addnote addRamDisk hack-coff 92 93targets += 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 99extra-y := initrd.o 100 101quiet_cmd_ramdisk = RAMDISK $@ 102 cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@ 103 104quiet_cmd_stripvm = STRIP $@ 105 cmd_stripvm = $(STRIP) -s -R .comment $< -o $@ 106 107vmlinux.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 112quiet_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 117quiet_cmd_addnote = ADDNOTE $@ 118 cmd_addnote = $(obj)/addnote $@ 119 120quiet_cmd_gen-miboot = GEN $@ 121 cmd_gen-miboot = $(OBJCOPY) $(OBJCOPY_MIB_ARGS) \ 122 --add-section=$1=$(word 2, $^) $< $@ 123 124quiet_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. 151coffimage-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.coff 152coffrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.initrd.coff 153mibootimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/miboot.image 154mibrdimg-$(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#----------------------------------------------------------- 185quiet_cmd_mygzip = GZIP $@ 186cmd_mygzip = gzip -f -9 < $< > $@.$$$$ && mv $@.$$$$ $@ 187 188quiet_cmd_objbin = OBJCOPY $@ 189 cmd_objbin = $(OBJCOPY) -O binary $< $@ 190 191quiet_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 196MKIMAGE := $(srctree)/scripts/mkuboot.sh 197targets += uImage 198extra-y += vmlinux.bin vmlinux.gz 199 200$(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 212install: $(CONFIGURE) $(BOOTIMAGE) 213 sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)" 214 215clean-files += $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip) 216