diff options
Diffstat (limited to 'arch/powerpc/boot/Makefile')
| -rw-r--r-- | arch/powerpc/boot/Makefile | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile new file mode 100644 index 000000000000..9770f587af73 --- /dev/null +++ b/arch/powerpc/boot/Makefile @@ -0,0 +1,149 @@ +# Makefile for making ELF bootable images for booting on CHRP +# using Open Firmware. +# +# Geert Uytterhoeven September 1997 +# +# Based on coffboot by Paul Mackerras +# Simplified for ppc64 by Todd Inglett +# +# NOTE: this code is built for 32 bit in ELF32 format even though +# it packages a 64 bit kernel. We do this to simplify the +# bootloader and increase compatibility with OpenFirmware. +# +# To this end we need to define BOOTCC, etc, as the tools +# needed to build the 32 bit image. These are normally HOSTCC, +# but may be a third compiler if, for example, you are cross +# compiling from an intel box. Once the 64bit ppc gcc is +# stable it will probably simply be a compiler switch to +# compile for 32bit mode. +# To make it easier to setup a cross compiler, +# CROSS32_COMPILE is setup as a prefix just like CROSS_COMPILE +# in the toplevel makefile. + + +HOSTCC := gcc +BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \ + $(shell $(CROSS32CC) -print-file-name=include) -fPIC +BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc +BOOTLFLAGS := -T $(srctree)/$(src)/zImage.lds +OBJCOPYFLAGS := contents,alloc,load,readonly,data + +zlib := infblock.c infcodes.c inffast.c inflate.c inftrees.c infutil.c +zlibheader := infblock.h infcodes.h inffast.h inftrees.h infutil.h +zliblinuxheader := zlib.h zconf.h zutil.h + +$(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader)) +#$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h) + +src-boot := string.S prom.c main.c div64.S crt0.S +src-boot += $(zlib) +src-boot := $(addprefix $(obj)/, $(src-boot)) +obj-boot := $(addsuffix .o, $(basename $(src-boot))) + +BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj) + +quiet_cmd_copy_zlib = COPY $@ + cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@ + +quiet_cmd_copy_zlibheader = COPY $@ + cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@ +# stddef.h for NULL +quiet_cmd_copy_zliblinuxheader = COPY $@ + cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@ + +$(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/% + $(call cmd,copy_zlib) + +$(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/% + $(call cmd,copy_zlibheader) + +$(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/% + $(call cmd,copy_zliblinuxheader) + +clean-files := $(zlib) $(zlibheader) $(zliblinuxheader) + + +quiet_cmd_bootcc = BOOTCC $@ + cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $< + +quiet_cmd_bootas = BOOTAS $@ + cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $< + +quiet_cmd_bootld = BOOTLD $@ + cmd_bootld = $(CROSS32LD) $(BOOTLFLAGS) -o $@ $(2) + +$(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c + $(call if_changed_dep,bootcc) +$(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S + $(call if_changed_dep,bootas) + +#----------------------------------------------------------- +# ELF sections within the zImage bootloader/wrapper +#----------------------------------------------------------- +required := vmlinux.strip +initrd := initrd + +obj-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.o, $(section))) +src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section))) +gz-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section))) + +hostprogs-y := addnote addRamDisk +targets += zImage.vmode zImage.initrd.vmode zImage zImage.initrd \ + $(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd))) \ + $(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd))) \ + $(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd))) \ + vmlinux.initrd +extra-y := initrd.o + +quiet_cmd_ramdisk = RAMDISK $@ + cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@ + +quiet_cmd_stripvm = STRIP $@ + cmd_stripvm = $(STRIP) -s -R .comment $< -o $@ + +vmlinux.strip: vmlinux + $(call if_changed,stripvm) +$(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz + $(call if_changed,ramdisk) + +quiet_cmd_addsection = ADDSEC $@ + cmd_addsection = $(CROSS32OBJCOPY) $@ \ + --add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(patsubst %.o,%.gz, $@) \ + --set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(OBJCOPYFLAGS) + +quiet_cmd_addnote = ADDNOTE $@ + cmd_addnote = $(obj)/addnote $@ + +$(call gz-sec, $(required)): $(obj)/kernel-%.gz: % + $(call if_changed,gzip) + +$(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz + cp -f $(obj)/ramdisk.image.gz $@ + +$(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz + @touch $@ + +$(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c + $(call if_changed_dep,bootcc) + $(call cmd,addsection) + +$(obj)/zImage.vmode: obj-boot += $(call obj-sec, $(required)) +$(obj)/zImage.vmode: $(call obj-sec, $(required)) $(obj-boot) $(srctree)/$(src)/zImage.lds + $(call cmd,bootld,$(obj-boot)) + +$(obj)/zImage.initrd.vmode: obj-boot += $(call obj-sec, $(required) $(initrd)) +$(obj)/zImage.initrd.vmode: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(srctree)/$(src)/zImage.lds + $(call cmd,bootld,$(obj-boot)) + +$(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote + @cp -f $< $@ + $(call if_changed,addnote) + +$(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote + @cp -f $< $@ + $(call if_changed,addnote) + +install: $(CONFIGURE) $(BOOTIMAGE) + sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)" + +clean-files := $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip) |