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From: kyungsik.lee@lge.com (Kyungsik Lee)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 -next 3/5] arm: Add support for LZ4-compressed kernel
Date: Tue,  5 Mar 2013 20:47:34 +0900	[thread overview]
Message-ID: <1362484056-9778-4-git-send-email-kyungsik.lee@lge.com> (raw)
In-Reply-To: <1362484056-9778-1-git-send-email-kyungsik.lee@lge.com>

This patch integrates the LZ4 decompression code to the arm pre-boot code.
And it depends on two patchs below

lib: Add support for LZ4-compressed kernel
decompressor: Add LZ4 decompressor module

Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com>

v2:
- Apply CFLAGS, -Os to decompress.o to improve decompress
  performance during boot-up process
---
 arch/arm/Kconfig                      | 1 +
 arch/arm/boot/compressed/.gitignore   | 1 +
 arch/arm/boot/compressed/Makefile     | 6 +++++-
 arch/arm/boot/compressed/decompress.c | 4 ++++
 arch/arm/boot/compressed/piggy.lz4.S  | 6 ++++++
 5 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/boot/compressed/piggy.lz4.S

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 67874b8..0f9b363 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -38,6 +38,7 @@ config ARM
 	select HAVE_IDE if PCI || ISA || PCMCIA
 	select HAVE_IRQ_WORK
 	select HAVE_KERNEL_GZIP
+	select HAVE_KERNEL_LZ4
 	select HAVE_KERNEL_LZMA
 	select HAVE_KERNEL_LZO
 	select HAVE_KERNEL_XZ
diff --git a/arch/arm/boot/compressed/.gitignore b/arch/arm/boot/compressed/.gitignore
index f79a08e..47279aa 100644
--- a/arch/arm/boot/compressed/.gitignore
+++ b/arch/arm/boot/compressed/.gitignore
@@ -6,6 +6,7 @@ piggy.gzip
 piggy.lzo
 piggy.lzma
 piggy.xzkern
+piggy.lz4
 vmlinux
 vmlinux.lds
 
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index 5cad8a6..2249d52 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -24,6 +24,9 @@ endif
 AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET)
 HEAD	= head.o
 OBJS	+= misc.o decompress.o
+ifeq ($(CONFIG_KERNEL_LZ4),y)
+CFLAGS_decompress.o := -Os
+endif
 FONTC	= $(srctree)/drivers/video/console/font_acorn_8x8.c
 
 # string library code (-Os is enforced to keep it much smaller)
@@ -88,6 +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
 
@@ -112,7 +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)
 
 ifeq ($(CONFIG_FUNCTION_TRACER),y)
diff --git a/arch/arm/boot/compressed/decompress.c b/arch/arm/boot/compressed/decompress.c
index 9deb56a..a95f071 100644
--- a/arch/arm/boot/compressed/decompress.c
+++ b/arch/arm/boot/compressed/decompress.c
@@ -53,6 +53,10 @@ 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);
diff --git a/arch/arm/boot/compressed/piggy.lz4.S b/arch/arm/boot/compressed/piggy.lz4.S
new file mode 100644
index 0000000..3d9a575
--- /dev/null
+++ b/arch/arm/boot/compressed/piggy.lz4.S
@@ -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:
-- 
1.8.1.1

  parent reply	other threads:[~2013-03-05 11:47 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-05 11:47 [PATCH v3 -next 0/5] Add support for LZ4-compressed kernel Kyungsik Lee
2013-03-05 11:47 ` [PATCH v3 -next 1/5] decompressor: Add LZ4 decompressor module Kyungsik Lee
2013-03-05 11:47 ` [PATCH v3 -next 2/5] lib: Add support for LZ4-compressed kernel Kyungsik Lee
2013-03-05 11:47 ` Kyungsik Lee [this message]
2013-04-30 20:56   ` [PATCH v3 -next 3/5] arm: " Andrew Morton
2013-05-03  9:02     ` Kyungsik Lee
2013-03-05 11:47 ` [PATCH v3 -next 4/5] x86: " Kyungsik Lee
2013-03-05 16:13   ` H. Peter Anvin
2013-03-06  6:37     ` Kyungsik Lee
2013-04-25 22:43       ` Andrew Morton
2013-03-05 11:47 ` [PATCH v3 -next 5/5] Kconfig: Make x86 and arm kernels default to the LZ4-compressed Kyungsik Lee
2013-03-05 11:58   ` Borislav Petkov
2013-03-05 12:04   ` Florian Fainelli
2013-03-05 23:08     ` Andrew Morton
2013-03-06  9:57       ` Florian Fainelli
2013-03-06 11:16         ` Borislav Petkov
2013-03-05 16:13   ` H. Peter Anvin
2013-03-05 23:06 ` [PATCH v3 -next 0/5] Add support for LZ4-compressed kernel Andrew Morton
2013-03-06  6:15   ` Kyungsik Lee
2013-03-08  6:39   ` Kyungsik Lee

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