2012-01-13 16:55:07 +02:00
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From 2d303b4683145f7dbc918bd14d04e1396581b2ce Mon Sep 17 00:00:00 2001
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From: Imre Kaloz <kaloz@openwrt.org>
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Date: Thu, 7 Jul 2011 12:05:21 +0200
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Subject: [PATCH] ARM: support XZ compressed kernels
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Wire up support for the XZ decompressor
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Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
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---
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arch/arm/Kconfig | 1 +
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arch/arm/boot/compressed/Makefile | 11 +++++++++--
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arch/arm/boot/compressed/decompress.c | 4 ++++
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arch/arm/boot/compressed/piggy.xzkern.S | 6 ++++++
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lib/xz/xz_dec_stream.c | 1 +
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5 files changed, 21 insertions(+), 2 deletions(-)
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create mode 100644 arch/arm/boot/compressed/piggy.xzkern.S
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--- a/arch/arm/Kconfig
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+++ b/arch/arm/Kconfig
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@@ -20,6 +20,7 @@ config ARM
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select HAVE_KERNEL_GZIP
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select HAVE_KERNEL_LZO
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select HAVE_KERNEL_LZMA
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+ select HAVE_KERNEL_XZ
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select HAVE_IRQ_WORK
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select HAVE_PERF_EVENTS
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select PERF_USE_VMALLOC
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--- a/arch/arm/boot/compressed/Makefile
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+++ b/arch/arm/boot/compressed/Makefile
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@@ -92,6 +92,7 @@ SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/
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suffix_$(CONFIG_KERNEL_GZIP) = gzip
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suffix_$(CONFIG_KERNEL_LZO) = lzo
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suffix_$(CONFIG_KERNEL_LZMA) = lzma
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+suffix_$(CONFIG_KERNEL_XZ) = xzkern
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# Borrowed libfdt files for the ATAG compatibility mode
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@@ -115,7 +116,7 @@ targets := vmlinux vmlinux.lds \
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lib1funcs.o lib1funcs.S font.o font.c head.o misc.o $(OBJS)
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# Make sure files are removed during clean
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-extra-y += piggy.gzip piggy.lzo piggy.lzma lib1funcs.S $(libfdt) $(libfdt_hdrs)
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+extra-y += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern lib1funcs.S ashldi3.S $(libfdt) $(libfdt_hdrs)
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ifeq ($(CONFIG_FUNCTION_TRACER),y)
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ORIG_CFLAGS := $(KBUILD_CFLAGS)
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@@ -170,8 +171,14 @@ if [ $(words $(ZRELADDR)) -gt 1 -a "$(CO
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false; \
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fi
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+# For __aeabi_llsl
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+ashldi3 = $(obj)/ashldi3.o
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+
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+$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S FORCE
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+ $(call cmd,shipped)
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+
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$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
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- $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
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+ $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) FORCE
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@$(check_for_multiple_zreladdr)
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$(call if_changed,ld)
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@$(check_for_bad_syms)
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--- a/arch/arm/boot/compressed/decompress.c
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+++ b/arch/arm/boot/compressed/decompress.c
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2012-01-15 00:55:04 +02:00
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@@ -44,6 +44,12 @@ extern void error(char *);
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2012-01-13 16:55:07 +02:00
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#include "../../../../lib/decompress_unlzma.c"
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#endif
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+#ifdef CONFIG_KERNEL_XZ
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2012-01-15 00:55:04 +02:00
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+#define memmove memmove
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+#define memcpy memcpy
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2012-01-13 16:55:07 +02:00
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+#include "../../../../lib/decompress_unxz.c"
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+#endif
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+
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int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x))
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{
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return decompress(input, len, NULL, NULL, output, NULL, error);
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--- /dev/null
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+++ b/arch/arm/boot/compressed/piggy.xzkern.S
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@@ -0,0 +1,6 @@
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+ .section .piggydata,#alloc
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+ .globl input_data
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+input_data:
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+ .incbin "arch/arm/boot/compressed/piggy.xzkern"
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+ .globl input_data_end
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+input_data_end:
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--- a/lib/xz/xz_dec_stream.c
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+++ b/lib/xz/xz_dec_stream.c
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@@ -9,6 +9,7 @@
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#include "xz_private.h"
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#include "xz_stream.h"
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+#include <linux/kernel.h>
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/* Hash used to validate the Index field */
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struct xz_dec_hash {
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