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arm: add support for LZ4-compressed kernel 

Integrates the LZ4 decompression code to the arm pre-boot code.

Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Florian Fainelli <florian@openwrt.org>
Cc: Yann Collet <yann.collet.73@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kyungsik Lee 2013-07-08 16:01:48 -07:00 committed by Linus Torvalds
parent e76e1fdfa8
commit f9b493ac9b
9 changed files with 28 additions and 5 deletions
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7
Documentation/x86/boot.txt
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@ -657,9 +657,10 @@ Protocol: 2.08+
uncompressed data should be determined using the standard magic
numbers. The currently supported compression formats are gzip
(magic numbers 1F 8B or 1F 9E), bzip2 (magic number 42 5A), LZMA
(magic number 5D 00), and XZ (magic number FD 37). The uncompressed
payload is currently always ELF (magic number 7F 45 4C 46).
(magic number 5D 00), XZ (magic number FD 37), and LZ4 (magic number
02 21). The uncompressed payload is currently always ELF (magic
number 7F 45 4C 46).
Field name: payload_length
Type: read
Offset/size: 0x24c/4

1
arch/arm/Kconfig
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@ -41,6 +41,7 @@ config ARM
select HAVE_IDE if PCI || ISA || PCMCIA
select HAVE_IRQ_TIME_ACCOUNTING
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_LZ4
select HAVE_KERNEL_LZMA
select HAVE_KERNEL_LZO
select HAVE_KERNEL_XZ

1
arch/arm/boot/compressed/.gitignore vendored
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@ -6,6 +6,7 @@ piggy.gzip
piggy.lzo
piggy.lzma
piggy.xzkern
piggy.lz4
vmlinux
vmlinux.lds

3
arch/arm/boot/compressed/Makefile
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@ -91,6 +91,7 @@ suffix_$(CONFIG_KERNEL_GZIP) = gzip
suffix_$(CONFIG_KERNEL_LZO) = lzo
suffix_$(CONFIG_KERNEL_LZMA) = lzma
suffix_$(CONFIG_KERNEL_XZ) = xzkern
suffix_$(CONFIG_KERNEL_LZ4) = lz4
# Borrowed libfdt files for the ATAG compatibility mode
@ -115,7 +116,7 @@ targets := vmlinux vmlinux.lds \
font.o font.c head.o misc.o $(OBJS)
# Make sure files are removed during clean
extra-y += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern \
extra-y += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern piggy.lz4 \
lib1funcs.S ashldi3.S $(libfdt) $(libfdt_hdrs) \
hyp-stub.S

4
arch/arm/boot/compressed/decompress.c
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@ -51,6 +51,10 @@ extern char * strstr(const char * s1, const char *s2);
#include "../../../../lib/decompress_unxz.c"
#endif
#ifdef CONFIG_KERNEL_LZ4
#include "../../../../lib/decompress_unlz4.c"
#endif
int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x))
{
return decompress(input, len, NULL, NULL, output, NULL, error);

6
arch/arm/boot/compressed/piggy.lz4.S Normal file
View File

@ -0,0 +1,6 @@
.section .piggydata,#alloc
.globl input_data
input_data:
.incbin "arch/arm/boot/compressed/piggy.lz4"
.globl input_data_end
input_data_end:

1
arch/x86/Kconfig
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@ -65,6 +65,7 @@ config X86
select HAVE_KERNEL_LZMA
select HAVE_KERNEL_XZ
select HAVE_KERNEL_LZO
select HAVE_KERNEL_LZ4
select HAVE_HW_BREAKPOINT
select HAVE_MIXED_BREAKPOINTS_REGS
select PERF_EVENTS

6
arch/x86/boot/compressed/Makefile
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@ -4,7 +4,8 @@
# create a compressed vmlinux image from the original vmlinux
#
targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma vmlinux.bin.xz vmlinux.bin.lzo
targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \
vmlinux.bin.xz vmlinux.bin.lzo vmlinux.bin.lz4
KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
KBUILD_CFLAGS += -fno-strict-aliasing -fPIC
@ -63,12 +64,15 @@ $(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)
$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE
$(call if_changed,lz4)
suffix-$(CONFIG_KERNEL_GZIP) := gz
suffix-$(CONFIG_KERNEL_BZIP2) := bz2
suffix-$(CONFIG_KERNEL_LZMA) := lzma
suffix-$(CONFIG_KERNEL_XZ) := xz
suffix-$(CONFIG_KERNEL_LZO) := lzo
suffix-$(CONFIG_KERNEL_LZ4) := lz4
quiet_cmd_mkpiggy = MKPIGGY $@
cmd_mkpiggy = $(obj)/mkpiggy $< > $@ || ( rm -f $@ ; false )

4
arch/x86/boot/compressed/misc.c
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@ -145,6 +145,10 @@ static int lines, cols;
#include "../../../../lib/decompress_unlzo.c"
#endif
#ifdef CONFIG_KERNEL_LZ4
#include "../../../../lib/decompress_unlz4.c"
#endif
static void scroll(void)
{
int i;