Djam/u-boot
1
0
Fork 0
mirror of https://github.com/u-boot/u-boot.git synced 2025-05-08 19:11:53 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Add LZO decompressor support

Browse source 
This patch adds LZO decompression support to U-Boot. It is needed for
the upcoming UBIFS support, since UBIFS uses LZO as default compressor/
decompressor. Since we only support read-only in UBIFS, only the
decompressor is needed.

All this is copied with minor changes from the current Linux kernel
version (2.6.28-rc8).

This patch only implements this LZO decompressor support for PPC.
Other platforms using UBIFS will have to add the required
"include/asm/unaligned.h" as well. It should be fairly easy to copy this
from the Linux source tree as I have done it for PPC in this patch.

Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese 2009-03-19 15:34:56 +01:00 • committed by Wolfgang Denk
parent 68d7d65100
commit b1b4e89a0f
8 changed files with 532 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

71
include/linux/unaligned/generic.h Normal file
View file

@ -0,0 +1,71 @@
#ifndef _LINUX_UNALIGNED_GENERIC_H
#define _LINUX_UNALIGNED_GENERIC_H
/* define __force to nothing in U-Boot */
#define __force
/*
* Cause a link-time error if we try an unaligned access other than
* 1,2,4 or 8 bytes long
*/
extern void __bad_unaligned_access_size(void);
#define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \
__builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \
__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \
__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \
__bad_unaligned_access_size())))); \
}))
#define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \
__builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \
__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \
__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \
__bad_unaligned_access_size())))); \
}))
#define __put_unaligned_le(val, ptr) ({ \
void *__gu_p = (ptr); \
switch (sizeof(*(ptr))) { \
case 1: \
*(u8 *)__gu_p = (__force u8)(val); \
break; \
case 2: \
put_unaligned_le16((__force u16)(val), __gu_p); \
break; \
case 4: \
put_unaligned_le32((__force u32)(val), __gu_p); \
break; \
case 8: \
put_unaligned_le64((__force u64)(val), __gu_p); \
break; \
default: \
__bad_unaligned_access_size(); \
break; \
} \
(void)0; })
#define __put_unaligned_be(val, ptr) ({ \
void *__gu_p = (ptr); \
switch (sizeof(*(ptr))) { \
case 1: \
*(u8 *)__gu_p = (__force u8)(val); \
break; \
case 2: \
put_unaligned_be16((__force u16)(val), __gu_p); \
break; \
case 4: \
put_unaligned_be32((__force u32)(val), __gu_p); \
break; \
case 8: \
put_unaligned_be64((__force u64)(val), __gu_p); \
break; \
default: \
__bad_unaligned_access_size(); \
break; \
} \
(void)0; })
#endif /* _LINUX_UNALIGNED_GENERIC_H */