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Diffstat (limited to 'arch/nds32/include/asm/bitops.h')
| -rw-r--r-- | arch/nds32/include/asm/bitops.h | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/arch/nds32/include/asm/bitops.h b/arch/nds32/include/asm/bitops.h deleted file mode 100644 index f1cdcf3e65d..00000000000 --- a/arch/nds32/include/asm/bitops.h +++ /dev/null @@ -1,194 +0,0 @@ -/* - * Copyright 1995, Russell King. - * Various bits and pieces copyrights include: - * Linus Torvalds (test_bit). - * - * Copyright (C) 2011 Andes Technology Corporation - * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com> - * - * 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_NDS_BITOPS_H -#define __ASM_NDS_BITOPS_H - -#ifdef __KERNEL__ - -#include <asm/system.h> -#include <asm-generic/bitops/fls.h> -#include <asm-generic/bitops/__fls.h> -#include <asm-generic/bitops/fls64.h> -#include <asm-generic/bitops/__ffs.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, void *addr); - -static inline void __set_bit(int nr, void *addr) -{ - int *a = (int *)addr; - int mask; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - *a |= mask; -} - -#define PLATFORM__SET_BIT - -extern void clear_bit(int nr, void *addr); - -static inline void __clear_bit(int nr, void *addr) -{ - int *a = (int *)addr; - int mask; - unsigned long flags; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - local_irq_save(flags); - *a &= ~mask; - local_irq_restore(flags); -} - -#define PLATFORM__CLEAR_BIT - -extern void change_bit(int nr, void *addr); - -static inline void __change_bit(int nr, void *addr) -{ - int mask; - unsigned long *ADDR = (unsigned long *)addr; - - ADDR += nr >> 5; - mask = 1 << (nr & 31); - *ADDR ^= mask; -} - -extern int test_and_set_bit(int nr, void *addr); - -static inline int __test_and_set_bit(int nr, void *addr) -{ - int mask, retval; - unsigned int *a = (unsigned int *)addr; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - retval = (mask & *a) != 0; - *a |= mask; - return retval; -} - -extern int test_and_clear_bit(int nr, void *addr); - -static inline int __test_and_clear_bit(int nr, void *addr) -{ - int mask, retval; - unsigned int *a = (unsigned int *)addr; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - retval = (mask & *a) != 0; - *a &= ~mask; - return retval; -} - -extern int test_and_change_bit(int nr, void *addr); - -static inline int __test_and_change_bit(int nr, void *addr) -{ - int mask, retval; - unsigned int *a = (unsigned int *)addr; - - a += nr >> 5; - mask = 1 << (nr & 0x1f); - retval = (mask & *a) != 0; - *a ^= mask; - return retval; -} - -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; -} - -/* - * 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). - */ - -/* - * redefined in include/linux/bitops.h - * #define ffs(x) generic_ffs(x) - */ - -/* - * 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 /* __ASM_NDS_BITOPS_H */ |