diff options
author | Peter Tyser <ptyser@xes-inc.com> | 2010-04-13 07:28:08 +0400 |
---|---|---|
committer | Wolfgang Denk <wd@denx.de> | 2010-04-13 11:13:12 +0400 |
commit | 819833af39a91fa1c1e8252862bbda6f5a602f7b (patch) | |
tree | d5c9d1628643347ab2b5a8085acfa6f96709fda3 /arch/m68k/include/asm/bitops.h | |
parent | 61f2b38a17f5b21c59f2afe6cf1cbb5f28638cf9 (diff) | |
download | u-boot-819833af39a91fa1c1e8252862bbda6f5a602f7b.tar.xz |
Move architecture-specific includes to arch/$ARCH/include/asm
This helps to clean up the include/ directory so that it only contains
non-architecture-specific headers and also matches Linux's directory
layout which many U-Boot developers are already familiar with.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'arch/m68k/include/asm/bitops.h')
-rw-r--r-- | arch/m68k/include/asm/bitops.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/bitops.h b/arch/m68k/include/asm/bitops.h new file mode 100644 index 0000000000..ad971b4f31 --- /dev/null +++ b/arch/m68k/include/asm/bitops.h @@ -0,0 +1,58 @@ +/* + * bitops.h: Bit string operations on the m68k + */ + +#ifndef _M68K_BITOPS_H +#define _M68K_BITOPS_H + +#include <linux/config.h> +#include <asm/byteorder.h> + +extern void set_bit(int nr, volatile void *addr); +extern void clear_bit(int nr, volatile void *addr); +extern void change_bit(int nr, volatile void *addr); +extern int test_and_set_bit(int nr, volatile void *addr); +extern int test_and_clear_bit(int nr, volatile void *addr); +extern int test_and_change_bit(int nr, volatile void *addr); + +#ifdef __KERNEL__ + +/* + * ffs: find first bit set. This is defined the same way as + * the libc and compiler builtin ffs routines, therefore + * differs in spirit from the above ffz (man ffs). + */ +extern __inline__ int ffs(int x) +{ + int r = 1; + + if (!x) + return 0; + if (!(x & 0xffff)) { + x >>= 16; + r += 16; + } + if (!(x & 0xff)) { + x >>= 8; + r += 8; + } + if (!(x & 0xf)) { + x >>= 4; + r += 4; + } + if (!(x & 3)) { + x >>= 2; + r += 2; + } + if (!(x & 1)) { + x >>= 1; + r += 1; + } + return r; +} +#define __ffs(x) (ffs(x) - 1) +#define PLATFORM_FFS + +#endif /* __KERNEL__ */ + +#endif /* _M68K_BITOPS_H */ |