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 28BOOTLFLAGS := -T $(srctree)/$(src)/zImage.lds 29OBJCOPYFLAGS := contents,alloc,load,readonly,data 30 31zlib := infblock.c infcodes.c inffast.c inflate.c inftrees.c infutil.c 32zlibheader := infblock.h infcodes.h inffast.h inftrees.h infutil.h 33zliblinuxheader := zlib.h zconf.h zutil.h 34 35$(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader)) 36#$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h) 37 38src-boot := string.S prom.c main.c div64.S crt0.S 39src-boot += $(zlib) 40src-boot := $(addprefix $(obj)/, $(src-boot)) 41obj-boot := $(addsuffix .o, $(basename $(src-boot))) 42 43BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj) 44 45quiet_cmd_copy_zlib = COPY $@ 46 cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@ 47 48quiet_cmd_copy_zlibheader = COPY $@ 49 cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@ 50# stddef.h for NULL 51quiet_cmd_copy_zliblinuxheader = COPY $@ 52 cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@ 53 54$(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/% 55 $(call cmd,copy_zlib) 56 57$(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/% 58 $(call cmd,copy_zlibheader) 59 60$(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/% 61 $(call cmd,copy_zliblinuxheader) 62 63clean-files := $(zlib) $(zlibheader) $(zliblinuxheader) 64 65 66quiet_cmd_bootcc = BOOTCC $@ 67 cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $< 68 69quiet_cmd_bootas = BOOTAS $@ 70 cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $< 71 72quiet_cmd_bootld = BOOTLD $@ 73 cmd_bootld = $(CROSS32LD) $(BOOTLFLAGS) -o $@ $(2) 74 75$(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c 76 $(call if_changed_dep,bootcc) 77$(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S 78 $(call if_changed_dep,bootas) 79 80#----------------------------------------------------------- 81# ELF sections within the zImage bootloader/wrapper 82#----------------------------------------------------------- 83required := vmlinux.strip 84initrd := initrd 85 86obj-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.o, $(section))) 87src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section))) 88gz-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section))) 89 90hostprogs-y := addnote addRamDisk 91targets += zImage.vmode zImage.initrd.vmode zImage zImage.initrd \ 92 $(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd))) \ 93 $(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd))) \ 94 $(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd))) \ 95 vmlinux.initrd 96extra-y := initrd.o 97 98quiet_cmd_ramdisk = RAMDISK $@ 99 cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@ 100 101quiet_cmd_stripvm = STRIP $@ 102 cmd_stripvm = $(STRIP) -s -R .comment $< -o $@ 103 104vmlinux.strip: vmlinux 105 $(call if_changed,stripvm) 106$(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz 107 $(call if_changed,ramdisk) 108 109quiet_cmd_addsection = ADDSEC $@ 110 cmd_addsection = $(CROSS32OBJCOPY) $@ \ 111 --add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(patsubst %.o,%.gz, $@) \ 112 --set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(OBJCOPYFLAGS) 113 114quiet_cmd_addnote = ADDNOTE $@ 115 cmd_addnote = $(obj)/addnote $@ 116 117$(call gz-sec, $(required)): $(obj)/kernel-%.gz: % 118 $(call if_changed,gzip) 119 120$(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz 121 cp -f $(obj)/ramdisk.image.gz $@ 122 123$(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz 124 @touch $@ 125 126$(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c 127 $(call if_changed_dep,bootcc) 128 $(call cmd,addsection) 129 130$(obj)/zImage.vmode: obj-boot += $(call obj-sec, $(required)) 131$(obj)/zImage.vmode: $(call obj-sec, $(required)) $(obj-boot) $(srctree)/$(src)/zImage.lds 132 $(call cmd,bootld,$(obj-boot)) 133 134$(obj)/zImage.initrd.vmode: obj-boot += $(call obj-sec, $(required) $(initrd)) 135$(obj)/zImage.initrd.vmode: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(srctree)/$(src)/zImage.lds 136 $(call cmd,bootld,$(obj-boot)) 137 138$(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote 139 @cp -f $< $@ 140 $(call if_changed,addnote) 141 142$(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote 143 @cp -f $< $@ 144 $(call if_changed,addnote) 145 146#----------------------------------------------------------- 147# build u-boot images 148#----------------------------------------------------------- 149quiet_cmd_mygzip = GZIP $@ 150cmd_mygzip = gzip -f -9 < $< > $@.$$$$ && mv $@.$$$$ $@ 151 152quiet_cmd_objbin = OBJCOPY $@ 153 cmd_objbin = $(OBJCOPY) -O binary $< $@ 154 155quiet_cmd_uimage = UIMAGE $@ 156 cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A ppc -O linux -T kernel \ 157 -C gzip -a 00000000 -e 00000000 -n 'Linux-$(KERNELRELEASE)' \ 158 -d $< $@ 159 160MKIMAGE := $(srctree)/scripts/mkuboot.sh 161targets += uImage 162extra-y += vmlinux.bin vmlinux.gz 163 164$(obj)/vmlinux.bin: vmlinux FORCE 165 $(call if_changed,objbin) 166 167$(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE 168 $(call if_changed,mygzip) 169 170$(obj)/uImage: $(obj)/vmlinux.gz 171 $(Q)rm -f $@ 172 $(call cmd,uimage) 173 @echo -n ' Image: $@ ' 174 @if [ -f $@ ]; then echo 'is ready' ; else echo 'not made'; fi 175 176install: $(CONFIGURE) $(BOOTIMAGE) 177 sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)" 178 179clean-files := $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip) 180