sh: support XZ-compressed kernel.

Follow the x86 change and wire up support for the XZ decompressor.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/Kconfig

@@ -15,6 +15,7 @@ config SUPERH
 	select HAVE_KERNEL_GZIP
 	select HAVE_KERNEL_BZIP2
 	select HAVE_KERNEL_LZMA
+	select HAVE_KERNEL_XZ
 	select HAVE_KERNEL_LZO
 	select HAVE_SYSCALL_TRACEPOINTS
 	select HAVE_REGS_AND_STACK_ACCESS_API

arch/sh/Makefile

@@ -200,7 +200,7 @@ endif
 libs-$(CONFIG_SUPERH32)		:= arch/sh/lib/	$(libs-y)
 libs-$(CONFIG_SUPERH64)		:= arch/sh/lib64/ $(libs-y)
 
-BOOT_TARGETS = uImage uImage.bz2 uImage.gz uImage.lzma uImage.lzo \
+BOOT_TARGETS = uImage uImage.bz2 uImage.gz uImage.lzma uImage.xz uImage.lzo \
 	       uImage.srec uImage.bin zImage vmlinux.bin vmlinux.srec \
 	       romImage
 PHONY += $(BOOT_TARGETS)
@@ -230,5 +230,6 @@ define archhelp
 	@echo '* uImage.gz	           - Kernel-only image for U-Boot (gzip)'
 	@echo '  uImage.bz2	           - Kernel-only image for U-Boot (bzip2)'
 	@echo '  uImage.lzma	           - Kernel-only image for U-Boot (lzma)'
+	@echo '  uImage.xz	           - Kernel-only image for U-Boot (xz)'
 	@echo '  uImage.lzo	           - Kernel-only image for U-Boot (lzo)'
 endef

arch/sh/boot/Makefile

@@ -24,12 +24,13 @@ suffix-y := bin
 suffix-$(CONFIG_KERNEL_GZIP)	:= gz
 suffix-$(CONFIG_KERNEL_BZIP2)	:= bz2
 suffix-$(CONFIG_KERNEL_LZMA)	:= lzma
+suffix-$(CONFIG_KERNEL_XZ)	:= xz
 suffix-$(CONFIG_KERNEL_LZO)	:= lzo
 
 targets := zImage vmlinux.srec romImage uImage uImage.srec uImage.gz \
-	   uImage.bz2 uImage.lzma uImage.lzo uImage.bin
+	   uImage.bz2 uImage.lzma uImage.xz uImage.lzo uImage.bin
 extra-y += vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \
-	   vmlinux.bin.lzo
+	   vmlinux.bin.xz vmlinux.bin.lzo
 subdir- := compressed romimage
 
 $(obj)/zImage: $(obj)/compressed/vmlinux FORCE
@@ -76,6 +77,9 @@ $(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
 $(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
 	$(call if_changed,lzma)
 
+$(obj)/vmlinux.bin.xz: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,xzkern)
+
 $(obj)/vmlinux.bin.lzo: $(obj)/vmlinux.bin FORCE
 	$(call if_changed,lzo)
 
@@ -88,6 +92,9 @@ $(obj)/uImage.gz: $(obj)/vmlinux.bin.gz
 $(obj)/uImage.lzma: $(obj)/vmlinux.bin.lzma
 	$(call if_changed,uimage,lzma)
 
+$(obj)/uImage.xz: $(obj)/vmlinux.bin.xz
+	$(call if_changed,uimage,xz)
+
 $(obj)/uImage.lzo: $(obj)/vmlinux.bin.lzo
 	$(call if_changed,uimage,lzo)
 

arch/sh/boot/compressed/Makefile

@@ -6,7 +6,7 @@
 
 targets		:= vmlinux vmlinux.bin vmlinux.bin.gz \
 		   vmlinux.bin.bz2 vmlinux.bin.lzma \
-		   vmlinux.bin.lzo \
+		   vmlinux.bin.xz vmlinux.bin.lzo \
 		   head_$(BITS).o misc.o piggy.o
 
 OBJECTS = $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/cache.o
@@ -50,6 +50,8 @@ $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
 	$(call if_changed,bzip2)
 $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
 	$(call if_changed,lzma)
+$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE
+	$(call if_changed,xzkern)
 $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE
 	$(call if_changed,lzo)
 

arch/sh/boot/compressed/misc.c

@@ -61,6 +61,10 @@ static unsigned long free_mem_end_ptr;
 #include "../../../../lib/decompress_unlzma.c"
 #endif
 
+#ifdef CONFIG_KERNEL_XZ
+#include "../../../../lib/decompress_unxz.c"
+#endif
+
 #ifdef CONFIG_KERNEL_LZO
 #include "../../../../lib/decompress_unlzo.c"
 #endif