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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2014-04-04 10:06:14 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2014-04-04 10:06:14 +0200 |
| commit | 712b555f6cd07cfe3a1c26dc804134d006bf929d (patch) | |
| tree | 467fa1b174608e19540f40fb8d462ec3976025e8 /include | |
| parent | a5a82ca2cd84d3a730025bed7414b35f041750b6 (diff) | |
| parent | e32abecf6d7bad20ff83d61887b7be7bfa55d8ae (diff) | |
| download | barebox-712b555f6cd07cfe3a1c26dc804134d006bf929d.tar.gz barebox-712b555f6cd07cfe3a1c26dc804134d006bf929d.tar.xz | |
Merge branch 'for-next/davinci'
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/const.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/const.h b/include/linux/const.h new file mode 100644 index 0000000000..c872bfd25e --- /dev/null +++ b/include/linux/const.h @@ -0,0 +1,27 @@ +/* const.h: Macros for dealing with constants. */ + +#ifndef _LINUX_CONST_H +#define _LINUX_CONST_H + +/* Some constant macros are used in both assembler and + * C code. Therefore we cannot annotate them always with + * 'UL' and other type specifiers unilaterally. We + * use the following macros to deal with this. + * + * Similarly, _AT() will cast an expression with a type in C, but + * leave it unchanged in asm. + */ + +#ifdef __ASSEMBLY__ +#define _AC(X,Y) X +#define _AT(T,X) X +#else +#define __AC(X,Y) (X##Y) +#define _AC(X,Y) __AC(X,Y) +#define _AT(T,X) ((T)(X)) +#endif + +#define _BITUL(x) (_AC(1,UL) << (x)) +#define _BITULL(x) (_AC(1,ULL) << (x)) + +#endif /* !(_LINUX_CONST_H) */ |