1 files changed, 117 insertions, 0 deletions

diff --git a/arch/ppc64/boot/Makefile b/arch/ppc64/boot/Makefile
new file mode 100644
index 000000000000..d3e1d6af9203
--- /dev/null
+++ b/arch/ppc64/boot/Makefile
@@ -0,0 +1,117 @@
+# 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) $(LINUXINCLUDE) -fno-builtin 
+BOOTAFLAGS      := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional
+BOOTLFLAGS      := -Ttext 0x00400000 -e _start -T $(srctree)/$(src)/zImage.lds
+OBJCOPYFLAGS    := contents,alloc,load,readonly,data
+
+src-boot := crt0.S string.S prom.c main.c zlib.c imagesize.c div64.S
+src-boot := $(addprefix $(obj)/, $(src-boot))
+obj-boot := $(addsuffix .o, $(basename $(src-boot)))
+
+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 $@ $<
+
+$(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             := piggy addnote addRamDisk
+targets                 += zImage zImage.initrd imagesize.c \
+                           $(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 $< -o $@
+
+vmlinux.strip: vmlinux FORCE
+        $(call if_changed,stripvm)
+$(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz FORCE
+        $(call if_changed,ramdisk)
+
+addsection = $(CROSS32OBJCOPY) $(1) \
+                --add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $(1)))=$(patsubst %.o,%.gz, $(1)) \
+                --set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $(1)))=$(OBJCOPYFLAGS)
+
+quiet_cmd_addnote = ADDNOTE $@ 
+      cmd_addnote = $(CROSS32LD) $(BOOTLFLAGS) -o $@ $(obj-boot) && $(obj)/addnote $@
+
+quiet_cmd_piggy = PIGGY   $@
+      cmd_piggy = $(obj)/piggyback $(@:.o=) < $< | $(CROSS32AS) -o $@
+
+$(call gz-sec, $(required)): $(obj)/kernel-%.gz: % FORCE
+        $(call if_changed,gzip)
+
+$(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 FORCE
+        touch $@
+
+$(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c FORCE
+        $(call if_changed_dep,bootcc)
+        $(call addsection, $@)
+
+$(obj)/zImage: obj-boot += $(call obj-sec, $(required))
+$(obj)/zImage: $(call obj-sec, $(required)) $(obj-boot) $(obj)/addnote FORCE
+        $(call if_changed,addnote)
+
+$(obj)/zImage.initrd: obj-boot += $(call obj-sec, $(required) $(initrd))
+$(obj)/zImage.initrd: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(obj)/addnote FORCE
+        $(call if_changed,addnote)
+
+$(obj)/imagesize.c: vmlinux.strip
+        @echo Generating $@
+        ls -l vmlinux.strip | \
+        awk '{printf "/* generated -- do not edit! */\n" \
+                "unsigned long vmlinux_filesize = %d;\n", $$5}' > $(obj)/imagesize.c
+        $(CROSS_COMPILE)nm -n vmlinux | tail -n 1 | \
+        awk '{printf "unsigned long vmlinux_memsize = 0x%s;\n", substr($$1,8)}' \
+                >> $(obj)/imagesize.c
+
+install: $(CONFIGURE) $(BOOTIMAGE)
+        sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)"
+
+clean-files := $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip)