mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 15:13:55 +08:00
3ebe12439b
This implements the API defined in <linux/decompress/generic.h> which is used for kernel, initramfs, and initrd decompression. This patch together with the first patch is enough for XZ-compressed initramfs and initrd; XZ-compressed kernel will need arch-specific changes. The buffering requirements described in decompress_unxz.c are stricter than with gzip, so the relevant changes should be done to the arch-specific code when adding support for XZ-compressed kernel. Similarly, the heap size in arch-specific pre-boot code may need to be increased (30 KiB is enough). The XZ decompressor needs memmove(), memeq() (memcmp() == 0), and memzero() (memset(ptr, 0, size)), which aren't available in all arch-specific pre-boot environments. I'm including simple versions in decompress_unxz.c, but a cleaner solution would naturally be nicer. Signed-off-by: Lasse Collin <lasse.collin@tukaani.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Alain Knaff <alain@knaff.lu> Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com> Cc: Phillip Lougher <phillip@lougher.demon.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
20 lines
493 B
C
20 lines
493 B
C
/*
|
|
* Wrapper for decompressing XZ-compressed kernel, initramfs, and initrd
|
|
*
|
|
* Author: Lasse Collin <lasse.collin@tukaani.org>
|
|
*
|
|
* This file has been put into the public domain.
|
|
* You can do whatever you want with this file.
|
|
*/
|
|
|
|
#ifndef DECOMPRESS_UNXZ_H
|
|
#define DECOMPRESS_UNXZ_H
|
|
|
|
int unxz(unsigned char *in, int in_size,
|
|
int (*fill)(void *dest, unsigned int size),
|
|
int (*flush)(void *src, unsigned int size),
|
|
unsigned char *out, int *in_used,
|
|
void (*error)(char *x));
|
|
|
|
#endif
|