74 lines
2.5 KiB
Diff
74 lines
2.5 KiB
Diff
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:
|
|
Gzip: Data Size: 1586352 Bytes = 1549.17 kB = 1.51 MB
|
|
LZMA: Data Size: 2135916 Bytes = 2085.86 kB = 2.04 MB
|
|
|
|
Signed-off-by: Albin Tonnerre <albin.tonnerre <at> free-electrons.com>
|
|
Tested-by: Martin Michlmayr <tbm <at> cyrius.com>
|
|
---
|
|
v2: Updated to apply on top of 2.6.34-rc1
|
|
|
|
arch/arm/Kconfig | 1 +
|
|
arch/arm/boot/compressed/Makefile | 1 +
|
|
arch/arm/boot/compressed/decompress.c | 4 ++++
|
|
arch/arm/boot/compressed/piggy.lzma.S | 6 ++++++
|
|
4 files changed, 12 insertions(+), 0 deletions(-)
|
|
create mode 100644 arch/arm/boot/compressed/piggy.lzma.S
|
|
|
|
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
|
|
index 3b18128..3ebc7c3 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 97c89e7..53faa90 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 0da382f..d554df6 100644
|
|
--- a/arch/arm/boot/compressed/decompress.c
|
|
+++ b/arch/arm/boot/compressed/decompress.c
|
|
@@ -39,6 +39,10 @@ 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 0000000..d7e69cf
|
|
--- /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:
|
|
--
|
|
1.7.0
|
|
|