diff options
Diffstat (limited to 'include/asm-mips/txx9/generic.h')
| -rw-r--r-- | include/asm-mips/txx9/generic.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/asm-mips/txx9/generic.h b/include/asm-mips/txx9/generic.h index 1e1a9f2d2379..dc85515eac13 100644 --- a/include/asm-mips/txx9/generic.h +++ b/include/asm-mips/txx9/generic.h @@ -64,4 +64,22 @@ struct physmap_flash_data; void txx9_physmap_flash_init(int no, unsigned long addr, unsigned long size, const struct physmap_flash_data *pdata); +/* 8 bit version of __fls(): find first bit set (returns 0..7) */ +static inline unsigned int __fls8(unsigned char x) +{ + int r = 7; + + if (!(x & 0xf0)) { + r -= 4; + x <<= 4; + } + if (!(x & 0xc0)) { + r -= 2; + x <<= 2; + } + if (!(x & 0x80)) + r -= 1; + return r; +} + #endif /* __ASM_TXX9_GENERIC_H */ |