MIPS: boot: Provide more uImage options

Allow more compression algorithms as well as uncompressed uImage.bin
to be generated. An uncompressed image might be useful to rule out
problems in the decompression code in the bootloader or even speed
up the boot process at the expense of a bigger uImage file.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9271/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Makefile

@@ -298,7 +298,11 @@ boot-y			+= vmlinux.ecoff
 boot-y			+= vmlinux.srec
 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
 boot-y			+= uImage
+boot-y			+= uImage.bin
+boot-y			+= uImage.bz2
 boot-y			+= uImage.gz
+boot-y			+= uImage.lzma
+boot-y			+= uImage.lzo
 endif
 
 # compressed boot image targets (arch/mips/boot/compressed/)
@@ -397,7 +401,11 @@ define archhelp
 	echo '  vmlinuz.bin          - Raw binary zboot image'
 	echo '  vmlinuz.srec         - SREC zboot image'
 	echo '  uImage               - U-Boot image'
+	echo '  uImage.bin           - U-Boot image (uncompressed)'
+	echo '  uImage.bz2           - U-Boot image (bz2)'
 	echo '  uImage.gz            - U-Boot image (gzip)'
+	echo '  uImage.lzma          - U-Boot image (lzma)'
+	echo '  uImage.lzo           - U-Boot image (lzo)'
 	echo '  dtbs                 - Device-tree blobs for enabled boards'
 	echo
 	echo '  These will be default as appropriate for a configured platform.'

arch/mips/boot/Makefile

@@ -23,6 +23,12 @@ strip-flags   := $(addprefix --remove-section=,$(drop-sections))
 
 hostprogs-y := elf2ecoff
 
+suffix-y			:= bin
+suffix-$(CONFIG_KERNEL_BZIP2)	:= bz2
+suffix-$(CONFIG_KERNEL_GZIP)	:= gz
+suffix-$(CONFIG_KERNEL_LZMA)	:= lzma
+suffix-$(CONFIG_KERNEL_LZO)	:= lzo
+
 targets := vmlinux.ecoff
 quiet_cmd_ecoff = ECOFF	  $@
       cmd_ecoff = $(obj)/elf2ecoff $(VMLINUX) $@ $(e2eflag)
@@ -44,14 +50,53 @@ $(obj)/vmlinux.srec: $(VMLINUX) FORCE
 UIMAGE_LOADADDR  = $(VMLINUX_LOAD_ADDRESS)
 UIMAGE_ENTRYADDR = $(VMLINUX_ENTRY_ADDRESS)
 
+#
+# Compressed vmlinux images
+#
+
+extra-y += vmlinux.bin.bz2
+extra-y += vmlinux.bin.gz
+extra-y += vmlinux.bin.lzma
+extra-y += vmlinux.bin.lzo
+
+$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,bzip2)
+
 $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
 	$(call if_changed,gzip)
 
+$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,lzma)
+
+$(obj)/vmlinux.bin.lzo: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,lzo)
+
+#
+# Compressed u-boot images
+#
+
+targets += uImage
+targets += uImage.bin
+targets += uImage.bz2
 targets += uImage.gz
+targets += uImage.lzma
+targets += uImage.lzo
+
+$(obj)/uImage.bin: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,uimage,none)
+
+$(obj)/uImage.bz2: $(obj)/vmlinux.bin.bz2 FORCE
+	$(call if_changed,uimage,bzip2)
+
 $(obj)/uImage.gz: $(obj)/vmlinux.bin.gz FORCE
 	$(call if_changed,uimage,gzip)
 
-targets += uImage
-$(obj)/uImage: $(obj)/uImage.gz FORCE
+$(obj)/uImage.lzma: $(obj)/vmlinux.bin.lzma FORCE
+	$(call if_changed,uimage,lzma)
+
+$(obj)/uImage.lzo: $(obj)/vmlinux.bin.lzo FORCE
+	$(call if_changed,uimage,lzo)
+
+$(obj)/uImage: $(obj)/uImage.$(suffix-y)
 	@ln -sf $(notdir $<) $@
 	@echo '  Image $@ is ready'