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bzip2/lzma: x86 kernel compression support

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Impact: Replaces x86 kernel decompressor with new code

This is the third part of the bzip2/lzma patch

The bzip patch is based on an idea by Christian Ludwig, includes support for
compressing the kernel with bzip2 or lzma rather than gzip. Both
compressors give smaller sizes than gzip.  Lzma's decompresses faster
than bzip2.

It also supports ramdisks and initramfs' compressed using these two
compressors.

The functionality has been successfully used for a couple of years by
the udpcast project

This version applies to "tip" kernel 2.6.28

This part contains:
- support for new bzip2 and lzma kernel compression for x86

Signed-off-by: Alain Knaff <alain@knaff.lu>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Alain Knaff
2009-01-04 22:46:17 +01:00
committed by H. Peter Anvin
parent b172fd882d
commit ae03c49964
3 changed files with 44 additions and 107 deletions
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12
arch/x86/include/asm/boot.h
View File

@@ -15,11 +15,21 @@
+ (CONFIG_PHYSICAL_ALIGN - 1)) \
& ~(CONFIG_PHYSICAL_ALIGN - 1))
#if (defined CONFIG_KERNEL_BZIP2)
#define BOOT_HEAP_SIZE 0x400000
#else
#ifdef CONFIG_X86_64
#define BOOT_HEAP_SIZE 0x7000
#define BOOT_STACK_SIZE 0x4000
#else
#define BOOT_HEAP_SIZE 0x4000
#endif
#endif
#ifdef CONFIG_X86_64
#define BOOT_STACK_SIZE 0x4000
#else
#define BOOT_STACK_SIZE 0x1000
#endif