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| author | Albin Tonnerre <albin.tonnerre@free-electrons.com> | 2010-04-03 11:40:28 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-04-14 12:05:36 +0100 |
| commit | 6e8699f7d68589e0e9ab324f598a3357bceb40bc (patch) | |
| tree | 350b40d4a99c87912bd7a395f236f4ab87915b85 /arch/arm | |
| parent | 5cfc8ee0bb5134e1204e1ec5843e164f24315021 (diff) | |
| download | linux-6e8699f7d68589e0e9ab324f598a3357bceb40bc.tar.bz2 | |
ARM: 6026/1: ARM: Add support for LZMA-compressed kernel images
This patch allows using a kernel image compressed with LZMA on ARM.
Extracting the image is fairly slow, but it might be useful on machines
with a very limited amount of storage, as the size benefit is quite
significant (about 25% smaller with LZMA compared to GZIP)
Tested-by: Martin Michlmayr <tbm@cyrius.com>
Tested-by: Paulius Zaleckas <paulius.zaleckas@gmail.com>
Signed-off-by: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/boot/compressed/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/boot/compressed/decompress.c | 4 | ||||
| -rw-r--r-- | arch/arm/boot/compressed/piggy.lzma.S | 6 |
4 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index bf856f492eb5..5c8128c76996 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -21,6 +21,7 @@ config ARM select HAVE_GENERIC_DMA_COHERENT select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZO + select HAVE_KERNEL_LZMA select HAVE_PERF_EVENTS select PERF_USE_VMALLOC help diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index 97c89e7de7d3..53faa9063a03 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -65,6 +65,7 @@ SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/ suffix_$(CONFIG_KERNEL_GZIP) = gzip suffix_$(CONFIG_KERNEL_LZO) = lzo +suffix_$(CONFIG_KERNEL_LZMA) = lzma targets := vmlinux vmlinux.lds \ piggy.$(suffix_y) piggy.$(suffix_y).o \ diff --git a/arch/arm/boot/compressed/decompress.c b/arch/arm/boot/compressed/decompress.c index 9c097073ce4c..4c72a97bc3e1 100644 --- a/arch/arm/boot/compressed/decompress.c +++ b/arch/arm/boot/compressed/decompress.c @@ -40,6 +40,10 @@ extern void error(char *); #include "../../../../lib/decompress_unlzo.c" #endif +#ifdef CONFIG_KERNEL_LZMA +#include "../../../../lib/decompress_unlzma.c" +#endif + void do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x)) { decompress(input, len, NULL, NULL, output, NULL, error); diff --git a/arch/arm/boot/compressed/piggy.lzma.S b/arch/arm/boot/compressed/piggy.lzma.S new file mode 100644 index 000000000000..d7e69cffbc0a --- /dev/null +++ b/arch/arm/boot/compressed/piggy.lzma.S @@ -0,0 +1,6 @@ + .section .piggydata,#alloc + .globl input_data +input_data: + .incbin "arch/arm/boot/compressed/piggy.lzma" + .globl input_data_end +input_data_end: |