target/linux/generic/patches-3.3/006-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 --- a/arch/arm/Kconfig
  19 +++ b/arch/arm/Kconfig
  20 @@ -21,6 +21,7 @@ config ARM
  21         select HAVE_KERNEL_GZIP
  22         select HAVE_KERNEL_LZO
  23         select HAVE_KERNEL_LZMA
  24 +       select HAVE_KERNEL_XZ
  25         select HAVE_IRQ_WORK
  26         select HAVE_PERF_EVENTS
  27         select PERF_USE_VMALLOC
  28 --- a/arch/arm/boot/compressed/Makefile
  29 +++ b/arch/arm/boot/compressed/Makefile
  30 @@ -92,6 +92,7 @@ SEDFLAGS      = s/TEXT_START/$(ZTEXTADDR)/;s/
  31  suffix_$(CONFIG_KERNEL_GZIP) = gzip
  32  suffix_$(CONFIG_KERNEL_LZO)  = lzo
  33  suffix_$(CONFIG_KERNEL_LZMA) = lzma
  34 +suffix_$(CONFIG_KERNEL_XZ)   = xzkern
  35
  36  # Borrowed libfdt files for the ATAG compatibility mode
  37
  38 @@ -115,7 +116,7 @@ targets       := vmlinux vmlinux.lds \
  39                  lib1funcs.o lib1funcs.S font.o font.c head.o misc.o $(OBJS)
  40
  41  # Make sure files are removed during clean
  42 -extra-y       += piggy.gzip piggy.lzo piggy.lzma lib1funcs.S $(libfdt) $(libfdt_hdrs)
  43 +extra-y       += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern lib1funcs.S ashldi3.S $(libfdt) $(libfdt_hdrs)
  44
  45  ifeq ($(CONFIG_FUNCTION_TRACER),y)
  46  ORIG_CFLAGS := $(KBUILD_CFLAGS)
  47 @@ -171,8 +172,14 @@ if [ $(words $(ZRELADDR)) -gt 1 -a "$(CO
  48         false; \
  49  fi
  50
  51 +# For __aeabi_llsl
  52 +ashldi3 = $(obj)/ashldi3.o
  53 +
  54 +$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S FORCE
  55 +       $(call cmd,shipped)
  56 +
  57  $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
  58 -               $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
  59 +               $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) FORCE
  60         @$(check_for_multiple_zreladdr)
  61         $(call if_changed,ld)
  62         @$(check_for_bad_syms)
  63 --- a/arch/arm/boot/compressed/decompress.c
  64 +++ b/arch/arm/boot/compressed/decompress.c
  65 @@ -44,6 +44,12 @@ extern void error(char *);
  66  #include "../../../../lib/decompress_unlzma.c"
  67  #endif
  68
  69 +#ifdef CONFIG_KERNEL_XZ
  70 +#define memmove memmove
  71 +#define memcpy memcpy
  72 +#include "../../../../lib/decompress_unxz.c"
  73 +#endif
  74 +
  75  int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x))
  76  {
  77         return decompress(input, len, NULL, NULL, output, NULL, error);
  78 --- /dev/null
  79 +++ b/arch/arm/boot/compressed/piggy.xzkern.S
  80 @@ -0,0 +1,6 @@
  81 +       .section .piggydata,#alloc
  82 +       .globl  input_data
  83 +input_data:
  84 +       .incbin "arch/arm/boot/compressed/piggy.xzkern"
  85 +       .globl  input_data_end
  86 +input_data_end:
  87 --- a/lib/xz/xz_dec_stream.c
  88 +++ b/lib/xz/xz_dec_stream.c
  89 @@ -9,6 +9,7 @@
  90
  91  #include "xz_private.h"
  92  #include "xz_stream.h"
  93 +#include <linux/kernel.h>
  94
  95  /* Hash used to validate the Index field */
  96  struct xz_dec_hash {