X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=usr%2FKconfig;h=588c588791e288a836931aae27ffa694bbd0c99f;hb=be99ca4dd45b5ffc3ff30b2c80d7103aa1451afc;hp=07727f3c7ceac9d1d8dae309c9e5ba0fd0dbf101;hpb=c324b44c34050cf2a9b58830e11c974806bd85d8;p=linux-2.6-omap-h63xx.git

diff --git a/usr/Kconfig b/usr/Kconfig
index 07727f3c7ce..588c588791e 100644
--- a/usr/Kconfig
+++ b/usr/Kconfig
@@ -17,7 +17,7 @@ config INITRAMFS_SOURCE
 	  When multiple directories and files are specified then the
 	  initramfs image will be the aggregate of all of them.
 
-	  See <file:Documentation/early-userspace/README for more details.
+	  See <file:Documentation/early-userspace/README> for more details.
 
 	  If you are not sure, leave it blank.
 
@@ -44,3 +44,104 @@ config INITRAMFS_ROOT_GID
 	  owned by group root in the initial ramdisk image.
 
 	  If you are not sure, leave it set to "0".
+
+config RD_GZIP
+	bool "Support initial ramdisks compressed using gzip" if EMBEDDED
+	default y
+	depends on BLK_DEV_INITRD
+	select DECOMPRESS_GZIP
+	help
+	  Support loading of a gzip encoded initial ramdisk or cpio buffer.
+	  If unsure, say Y.
+
+config RD_BZIP2
+	bool "Support initial ramdisks compressed using bzip2" if EMBEDDED
+	default !EMBEDDED
+	depends on BLK_DEV_INITRD
+	select DECOMPRESS_BZIP2
+	help
+	  Support loading of a bzip2 encoded initial ramdisk or cpio buffer
+	  If unsure, say N.
+
+config RD_LZMA
+	bool "Support initial ramdisks compressed using LZMA" if EMBEDDED
+	default !EMBEDDED
+	depends on BLK_DEV_INITRD
+	select DECOMPRESS_LZMA
+	help
+	  Support loading of a LZMA encoded initial ramdisk or cpio buffer
+	  If unsure, say N.
+
+if INITRAMFS_SOURCE!=""
+
+choice
+	prompt "Built-in initramfs compression mode"
+	help
+	  This option decides by which algorithm the builtin initramfs
+	  will be compressed.  Several compression algorithms are
+	  available, which differ in efficiency, compression and
+	  decompression speed.  Compression speed is only relevant
+	  when building a kernel.  Decompression speed is relevant at
+	  each boot.
+
+	  If you have any problems with bzip2 or LZMA compressed
+	  initramfs, mail me (Alain Knaff) <alain@knaff.lu>.
+
+	  High compression options are mostly useful for users who are
+	  low on RAM, since it reduces the memory consumption during
+	  boot.
+
+	  If in doubt, select 'gzip'
+
+config INITRAMFS_COMPRESSION_NONE
+	bool "None"
+	help
+	  Do not compress the built-in initramfs at all. This may
+	  sound wasteful in space, but, you should be aware that the
+	  built-in initramfs will be compressed at a later stage
+	  anyways along with the rest of the kernel, on those
+	  architectures that support this.
+	  However, not compressing the initramfs may lead to slightly
+	  higher memory consumption during a short time at boot, while
+	  both the cpio image and the unpacked filesystem image will
+	  be present in memory simultaneously
+
+config INITRAMFS_COMPRESSION_GZIP
+	bool "Gzip"
+	depends on RD_GZIP
+	help
+	  The old and tried gzip compression. Its compression ratio is
+	  the poorest among the 3 choices; however its speed (both
+	  compression and decompression) is the fastest.
+
+config INITRAMFS_COMPRESSION_BZIP2
+	bool "Bzip2"
+	depends on RD_BZIP2
+	help
+	  Its compression ratio and speed is intermediate.
+	  Decompression speed is slowest among the three.  The initramfs
+	  size is about 10% smaller with bzip2, in comparison to gzip.
+	  Bzip2 uses a large amount of memory. For modern kernels you
+	  will need at least 8MB RAM or more for booting.
+
+config INITRAMFS_COMPRESSION_LZMA
+	bool "LZMA"
+	depends on RD_LZMA
+	help
+	  The most recent compression algorithm.
+	  Its ratio is best, decompression speed is between the other
+	  two. Compression is slowest.	The initramfs size is about 33%
+	  smaller with LZMA in comparison to gzip.
+
+endchoice
+
+endif
+
+if INITRAMFS_SOURCE=""
+# The builtin initramfs is so small so we don't want to bug the user...
+
+config INITRAMFS_COMPRESSION_NONE
+	bool
+	default y
+
+endif