[POWERPC] bootwrapper: Add a cuboot platform and a cuImage target

The cuImage target will build a uImage with bootwrapper code and a device
tree. The default device tree and platform file are determined by the
kernel configuration.

Signed-off-by: Scott Wood <[e-mail]>
Signed-off-by: Paul Mackerras <[e-mail]>

arch/powerpc/Makefile

···
 
 CPPFLAGS_vmlinux.lds	:= -Upowerpc
 
-BOOT_TARGETS = zImage zImage.initrd uImage
+BOOT_TARGETS = zImage zImage.initrd uImage cuImage
 
 PHONY += $(BOOT_TARGETS)
 

arch/powerpc/boot/.gitignore

···
 kernel-vmlinux.strip.gz
 mktree
 uImage
+cuImage
+cuImage.bin.gz
+cuImage.elf
 zImage
 zImage.chrp
 zImage.coff

arch/powerpc/boot/Makefile

···
 image-$(CONFIG_PPC_CHRP)		+= zImage.chrp
 image-$(CONFIG_PPC_EFIKA)		+= zImage.chrp
 image-$(CONFIG_PPC_PMAC)		+= zImage.pmac
-image-$(CONFIG_DEFAULT_UIMAGE)		+= uImage
+image-$(CONFIG_DEFAULT_UIMAGE)		+= uImage cuImage
 
 # For 32-bit powermacs, build the COFF and miboot images
 # as well as the ELF images.
···
 $(obj)/uImage: vmlinux $(wrapperbits)
 	$(call if_changed,wrap,uboot)
 
+cuboot-plat-y += unknown-platform
+
+dts = $(if $(shell echo $(CONFIG_) | grep '^/'),\
+       ,$(srctree)/$(src)/dts/)$(CONFIG_DEVICE_TREE)
+
+$(obj)/cuImage: vmlinux $(wrapperbits)
+	$(call if_changed,wrap,cuboot-$(word 1,$(cuboot-plat-y)),$(dts))
+
 $(obj)/zImage:		$(addprefix $(obj)/, $(image-y))
 	@rm -f $@; ln $< $@
 $(obj)/zImage.initrd:	$(addprefix $(obj)/, $(initrd-y))
···
 	sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" $<
 
 # anything not in $(targets)
-clean-files += $(image-) $(initrd-) zImage zImage.initrd
+clean-files += $(image-) $(initrd-) zImage zImage.initrd \
+               cuImage.elf cuImage.bin.gz
 
 # clean up files cached by wrapper
 clean-kernel := vmlinux.strip vmlinux.bin

arch/powerpc/boot/wrapper

···
     ksection=image
     isection=initrd
     ;;
+cuboot*)
+    gzip=
+    ;;
 esac
 
 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
···
 vmz="$vmz$gzip"
 
 case "$platform" in
-uboot)
-    rm -f "$ofile"
+uboot|cuboot*)
     version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
 	cut -d' ' -f3`
     if [ -n "$version" ]; then
 	version="-n Linux-$version"
     fi
+esac
+
+case "$platform" in
+uboot)
+    rm -f "$ofile"
     mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
 	$version -d "$vmz" "$ofile"
     if [ -z "$cacheit" ]; then
···
 	cut -d' ' -f3`
     ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
     $object/hack-coff "$ofile"
+    ;;
+cuboot*)
+    base=`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
+    entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | \
+           cut -d' ' -f3`
+    mv "$ofile" "$ofile".elf
+    ${CROSS}objcopy -O binary "$ofile".elf "$ofile".bin
+    gzip -f -9 "$ofile".bin
+    mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
+            $version -d "$ofile".bin.gz "$ofile"
     ;;
 esac