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Diffstat (limited to 'include/asm-arm/bitops.h')
| -rw-r--r-- | include/asm-arm/bitops.h | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/include/asm-arm/bitops.h b/include/asm-arm/bitops.h deleted file mode 100644 index 270f163..0000000 --- a/include/asm-arm/bitops.h +++ /dev/null @@ -1,151 +0,0 @@ -/* - * Copyright 1995, Russell King. - * Various bits and pieces copyrights include: - * Linus Torvalds (test_bit). - * - * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1). - * - * Please note that the code in this file should never be included - * from user space. Many of these are not implemented in assembler - * since they would be too costly. Also, they require priviledged - * instructions (which are not available from user mode) to ensure - * that they are atomic. - */ - -#ifndef __ASM_ARM_BITOPS_H -#define __ASM_ARM_BITOPS_H - -#ifdef __KERNEL__ - -#include <asm/proc/system.h> - -#define smp_mb__before_clear_bit() do { } while (0) -#define smp_mb__after_clear_bit() do { } while (0) - -/* - * Function prototypes to keep gcc -Wall happy. - */ -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); - -static inline void __change_bit(int nr, volatile void *addr) -{ - unsigned long mask = BIT_MASK(nr); - unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); - - *p ^= mask; -} - -static inline int __test_and_set_bit(int nr, volatile void *addr) -{ - unsigned long mask = BIT_MASK(nr); - unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); - unsigned long old = *p; - - *p = old | mask; - return (old & mask) != 0; -} - -static inline int test_and_set_bit(int nr, volatile void * addr) -{ - unsigned long flags; - int out; - - local_irq_save(flags); - out = __test_and_set_bit(nr, addr); - local_irq_restore(flags); - - return out; -} - -static inline int __test_and_clear_bit(int nr, volatile void *addr) -{ - unsigned long mask = BIT_MASK(nr); - unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); - unsigned long old = *p; - - *p = old & ~mask; - return (old & mask) != 0; -} - -static inline int test_and_clear_bit(int nr, volatile void * addr) -{ - unsigned long flags; - int out; - - local_irq_save(flags); - out = __test_and_clear_bit(nr, addr); - local_irq_restore(flags); - - return out; -} - -extern int test_and_change_bit(int nr, volatile void * addr); - -static inline int __test_and_change_bit(int nr, volatile void *addr) -{ - unsigned long mask = BIT_MASK(nr); - unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); - unsigned long old = *p; - - *p = old ^ mask; - return (old & mask) != 0; -} - -extern int find_first_zero_bit(void * addr, unsigned size); -extern int find_next_zero_bit(void * addr, int size, int offset); - -/* - * This routine doesn't need to be atomic. - */ -static inline int test_bit(int nr, const void * addr) -{ - return ((unsigned char *) addr)[nr >> 3] & (1U << (nr & 7)); -} - -/* - * ffz = Find First Zero in word. Undefined if no zero exists, - * so code should check against ~0UL first.. - */ -static inline unsigned long ffz(unsigned long word) -{ - int k; - - word = ~word; - k = 31; - if (word & 0x0000ffff) { k -= 16; word <<= 16; } - if (word & 0x00ff0000) { k -= 8; word <<= 8; } - if (word & 0x0f000000) { k -= 4; word <<= 4; } - if (word & 0x30000000) { k -= 2; word <<= 2; } - if (word & 0x40000000) { k -= 1; } - return k; -} - -/* - * hweightN: returns the hamming weight (i.e. the number - * of bits set) of a N-bit word - */ - -#define hweight32(x) generic_hweight32(x) -#define hweight16(x) generic_hweight16(x) -#define hweight8(x) generic_hweight8(x) - -#define ext2_set_bit test_and_set_bit -#define ext2_clear_bit test_and_clear_bit -#define ext2_test_bit test_bit -#define ext2_find_first_zero_bit find_first_zero_bit -#define ext2_find_next_zero_bit find_next_zero_bit - -/* Bitmap functions for the minix filesystem. */ -#define minix_test_and_set_bit(nr,addr) test_and_set_bit(nr,addr) -#define minix_set_bit(nr,addr) set_bit(nr,addr) -#define minix_test_and_clear_bit(nr,addr) test_and_clear_bit(nr,addr) -#define minix_test_bit(nr,addr) test_bit(nr,addr) -#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size) - -#endif /* __KERNEL__ */ - -#endif /* _ARM_BITOPS_H */ |