diff options
Diffstat (limited to 'include/asm-sh/bitops.h')
-rw-r--r-- | include/asm-sh/bitops.h | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/include/asm-sh/bitops.h b/include/asm-sh/bitops.h deleted file mode 100644 index c57d628..0000000 --- a/include/asm-sh/bitops.h +++ /dev/null @@ -1,153 +0,0 @@ -#ifndef __ASM_SH_BITOPS_H -#define __ASM_SH_BITOPS_H - -#ifdef __KERNEL__ -#include <asm/irqflags.h> -/* For __swab32 */ -#include <asm/byteorder.h> - -static inline void set_bit(int nr, volatile void * addr) -{ - int mask; - volatile unsigned int *a = addr; - unsigned long flags; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - local_irq_save(flags); - *a |= mask; - local_irq_restore(flags); -} - -/* - * clear_bit() doesn't provide any barrier for the compiler. - */ -#define smp_mb__before_clear_bit() barrier() -#define smp_mb__after_clear_bit() barrier() -static inline void clear_bit(int nr, volatile void * addr) -{ - int mask; - volatile unsigned int *a = addr; - unsigned long flags; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - local_irq_save(flags); - *a &= ~mask; - local_irq_restore(flags); -} - -static inline void change_bit(int nr, volatile void * addr) -{ - int mask; - volatile unsigned int *a = addr; - unsigned long flags; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - local_irq_save(flags); - *a ^= mask; - local_irq_restore(flags); -} - -static inline int test_and_set_bit(int nr, volatile void * addr) -{ - int mask, retval; - volatile unsigned int *a = addr; - unsigned long flags; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - local_irq_save(flags); - retval = (mask & *a) != 0; - *a |= mask; - local_irq_restore(flags); - - return retval; -} - -static inline int test_and_clear_bit(int nr, volatile void * addr) -{ - int mask, retval; - volatile unsigned int *a = addr; - unsigned long flags; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - local_irq_save(flags); - retval = (mask & *a) != 0; - *a &= ~mask; - local_irq_restore(flags); - - return retval; -} - -static inline int test_and_change_bit(int nr, volatile void * addr) -{ - int mask, retval; - volatile unsigned int *a = addr; - unsigned long flags; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - local_irq_save(flags); - retval = (mask & *a) != 0; - *a ^= mask; - local_irq_restore(flags); - - return retval; -} - -static inline unsigned long ffz(unsigned long word) -{ - unsigned long result; - - __asm__("1:\n\t" - "shlr %1\n\t" - "bt/s 1b\n\t" - " add #1, %0" - : "=r" (result), "=r" (word) - : "0" (~0L), "1" (word) - : "t"); - return result; -} - -/** - * ffs - find first bit in word. - * @word: The word to search - * - * Undefined if no bit exists, so code should check against 0 first. - */ -static 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 PLATFORM_FFS - -#endif /* __KERNEL__ */ - -#endif /* __ASM_SH_BITOPS_H */ |