target/linux/generic/patches-3.0/006-arm_kernel_xz_support.patch

   1 From 2d303b4683145f7dbc918bd14d04e1396581b2ce Mon Sep 17 00:00:00 2001
   2 From: Imre Kaloz <kaloz@openwrt.org>
   3 Date: Thu, 7 Jul 2011 12:05:21 +0200
   4 Subject: [PATCH] ARM: support XZ compressed kernels
   5
   6 Wire up support for the XZ decompressor
   7
   8 Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
   9 ---
  10  arch/arm/Kconfig                        |    1 +
  11  arch/arm/boot/compressed/Makefile       |   11 +++++++++--
  12  arch/arm/boot/compressed/decompress.c   |    4 ++++
  13  arch/arm/boot/compressed/piggy.xzkern.S |    6 ++++++
  14  lib/xz/xz_dec_stream.c                  |    1 +
  15  5 files changed, 21 insertions(+), 2 deletions(-)
  16  create mode 100644 arch/arm/boot/compressed/piggy.xzkern.S
  17
  18 diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
  19 index c2e5f3d..489fe16 100644
  20 --- a/arch/arm/Kconfig
  21 +++ b/arch/arm/Kconfig
  22 @@ -20,6 +20,7 @@ config ARM
  23         select HAVE_KERNEL_GZIP
  24         select HAVE_KERNEL_LZO
  25         select HAVE_KERNEL_LZMA
  26 +       select HAVE_KERNEL_XZ
  27         select HAVE_IRQ_WORK
  28         select HAVE_PERF_EVENTS
  29         select PERF_USE_VMALLOC
  30 diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
  31 index 23aad07..e5db34e 100644
  32 --- a/arch/arm/boot/compressed/Makefile
  33 +++ b/arch/arm/boot/compressed/Makefile
  34 @@ -82,13 +82,14 @@ SEDFLAGS    = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
  35  suffix_$(CONFIG_KERNEL_GZIP) = gzip
  36  suffix_$(CONFIG_KERNEL_LZO)  = lzo
  37  suffix_$(CONFIG_KERNEL_LZMA) = lzma
  38 +suffix_$(CONFIG_KERNEL_XZ)   = xzkern
  39
  40  targets       := vmlinux vmlinux.lds \
  41                  piggy.$(suffix_y) piggy.$(suffix_y).o \
  42                  font.o font.c head.o misc.o $(OBJS)
  43
  44  # Make sure files are removed during clean
  45 -extra-y       += piggy.gzip piggy.lzo piggy.lzma lib1funcs.S
  46 +extra-y       += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern lib1funcs.S ashldi3.S
  47
  48  ifeq ($(CONFIG_FUNCTION_TRACER),y)
  49  ORIG_CFLAGS := $(KBUILD_CFLAGS)
  50 @@ -133,8 +134,14 @@ bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \
  51    ( echo "following symbols must have non local/private scope:" >&2; \
  52      echo "$$bad_syms" >&2; rm -f $@; false )
  53
  54 +# For __aeabi_llsl
  55 +ashldi3 = $(obj)/ashldi3.o
  56 +
  57 +$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S FORCE
  58 +       $(call cmd,shipped)
  59 +
  60  $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
  61 -               $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
  62 +               $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) FORCE
  63         $(call if_changed,ld)
  64         @$(check_for_bad_syms)
  65
  66 diff --git a/arch/arm/boot/compressed/decompress.c b/arch/arm/boot/compressed/decompress.c
  67 index 07be5a2..0ecd8b4 100644
  68 --- a/arch/arm/boot/compressed/decompress.c
  69 +++ b/arch/arm/boot/compressed/decompress.c
  70 @@ -44,6 +44,10 @@ extern void error(char *);
  71  #include "../../../../lib/decompress_unlzma.c"
  72  #endif
  73
  74 +#ifdef CONFIG_KERNEL_XZ
  75 +#include "../../../../lib/decompress_unxz.c"
  76 +#endif
  77 +
  78  int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x))
  79  {
  80         return decompress(input, len, NULL, NULL, output, NULL, error);
  81 diff --git a/arch/arm/boot/compressed/piggy.xzkern.S b/arch/arm/boot/compressed/piggy.xzkern.S
  82 new file mode 100644
  83 index 0000000..5703f30
  84 --- /dev/null
  85 +++ b/arch/arm/boot/compressed/piggy.xzkern.S
  86 @@ -0,0 +1,6 @@
  87 +       .section .piggydata,#alloc
  88 +       .globl  input_data
  89 +input_data:
  90 +       .incbin "arch/arm/boot/compressed/piggy.xzkern"
  91 +       .globl  input_data_end
  92 +input_data_end:
  93 diff --git a/lib/xz/xz_dec_stream.c b/lib/xz/xz_dec_stream.c
  94 index ac809b1..9a60cc2 100644
  95 --- a/lib/xz/xz_dec_stream.c
  96 +++ b/lib/xz/xz_dec_stream.c
  97 @@ -9,6 +9,7 @@
  98
  99  #include "xz_private.h"
 100  #include "xz_stream.h"
 101 +#include <linux/kernel.h>
 102
 103  /* Hash used to validate the Index field */
 104  struct xz_dec_hash {
 105 --
 106 1.7.1
 107