Commit 4e23eb63 authored by Florian Fainelli's avatar Florian Fainelli Committed by Ralf Baechle
Browse files

MIPS: ZBOOT: Support XZ compression scheme 



Add support for the XZ compression scheme in the ZBOOT decompression
stub, in order to support it we need to:

- select the "xzkern" compression tool to compress the vmlinux.bin
  payload
- link with ashldi3.o for xz_dec_run() to work
- memcpy() is also required for decompress_unxz.c so we share the
  implementation between GZIP and XZ

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: blogic@openwrt.org
Cc: james.hogan@imgtec.com
Patchwork: https://patchwork.linux-mips.org/patch/5818/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 26fca83a

arch/mips/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -1491,6 +1491,7 @@ config SYS_SUPPORTS_ZBOOT 
	select HAVE_KERNEL_BZIP2

	select HAVE_KERNEL_LZMA

	select HAVE_KERNEL_LZO

	select HAVE_KERNEL_XZ



config SYS_SUPPORTS_ZBOOT_UART16550

	bool

arch/mips/boot/compressed/Makefile

+5 −0
Original line number Diff line number Diff line
@@ -37,6 +37,10 @@ vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o 
vmlinuzobjs-$(CONFIG_MIPS_ALCHEMY)		   += $(obj)/uart-alchemy.o

endif



ifdef CONFIG_KERNEL_XZ

vmlinuzobjs-y += $(obj)/../../lib/ashldi3.o

endif



targets += vmlinux.bin

OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S

$(obj)/vmlinux.bin: $(KBUILD_IMAGE) FORCE
@@ -46,6 +50,7 @@ tool_$(CONFIG_KERNEL_GZIP) = gzip 
tool_$(CONFIG_KERNEL_BZIP2)   = bzip2

tool_$(CONFIG_KERNEL_LZMA)    = lzma

tool_$(CONFIG_KERNEL_LZO)     = lzo

tool_$(CONFIG_KERNEL_XZ)      = xzkern



targets += vmlinux.bin.z

$(obj)/vmlinux.bin.z: $(obj)/vmlinux.bin FORCE

arch/mips/boot/compressed/decompress.c

+7 −1
Original line number Diff line number Diff line
@@ -43,7 +43,7 @@ void error(char *x) 
/* activate the code for pre-boot environment */

#define STATIC static



#ifdef CONFIG_KERNEL_GZIP

#if defined(CONFIG_KERNEL_GZIP) || defined(CONFIG_KERNEL_XZ)

void *memcpy(void *dest, const void *src, size_t n)

{

	int i;
@@ -54,6 +54,8 @@ void *memcpy(void *dest, const void *src, size_t n) 
		d[i] = s[i];

	return dest;

}

#endif

#ifdef CONFIG_KERNEL_GZIP

#include "../../../../lib/decompress_inflate.c"

#endif
@@ -78,6 +80,10 @@ void *memset(void *s, int c, size_t n) 
#include "../../../../lib/decompress_unlzo.c"

#endif



#ifdef CONFIG_KERNEL_XZ

#include "../../../../lib/decompress_unxz.c"

#endif



void decompress_kernel(unsigned long boot_heap_start)

{

	unsigned long zimage_start, zimage_size;

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