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Use lzma kernel compression.

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SVN-Revision: 20815
This commit is contained in:
Lars-Peter Clausen 2010-04-11 22:12:10 +00:00
parent fba1a0a074
commit e95a1d7228
2 changed files with 79 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
target/linux/mx2/config-2.6.34
View File

@ -48,7 +48,8 @@ CONFIG_DECOMPRESS_LZMA=y
# CONFIG_DEFAULT_SECURITY_SELINUX is not set
# CONFIG_DEFAULT_SECURITY_SMACK is not set
# CONFIG_DEFAULT_SECURITY_TOMOYO is not set
# CONFIG_DM9000 is not set
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
# CONFIG_FPE_FASTFPE is not set
# CONFIG_FPE_NWFPE is not set
CONFIG_FRAME_POINTER=y
@ -61,6 +62,7 @@ CONFIG_GENERIC_GPIO=y
CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
CONFIG_GPIOLIB=y
# CONFIG_GPIO_IT8761E is not set
CONFIG_GPIO_SYSFS=y
CONFIG_HARDIRQS_SW_RESEND=y
CONFIG_HAS_DMA=y
CONFIG_HAS_IOMEM=y
@ -72,6 +74,7 @@ CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_HAVE_IDE=y
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
@ -115,8 +118,6 @@ CONFIG_INPUT_KEYBOARD=y
# CONFIG_ISDN_CAPI is not set
# CONFIG_ISDN_DRV_GIGASET is not set
# CONFIG_ISDN_I4L is not set
CONFIG_KERNEL_GZIP=y
# CONFIG_KERNEL_LZMA is not set
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_GPIO is not set
# CONFIG_KEYBOARD_IMX is not set
@ -142,6 +143,8 @@ CONFIG_MTD_PHYSMAP=y
# CONFIG_MXC_IRQ_PRIOR is not set
# CONFIG_MXC_PWM is not set
CONFIG_NEED_DMA_MAP_STATE=y
# CONFIG_NETDEV_1000 is not set
# CONFIG_NET_ETHERNET is not set
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_PAGE_OFFSET=0xC0000000
# CONFIG_PCI_SYSCALL is not set

73
target/linux/mx2/patches-2.6.34/030-lzma.patch Normal file
View File

@ -0,0 +1,73 @@
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