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Diffstat (limited to 'include/asm-cris/bitops.h')
| -rw-r--r-- | include/asm-cris/bitops.h | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/include/asm-cris/bitops.h b/include/asm-cris/bitops.h deleted file mode 100644 index 75ea6e096483..000000000000 --- a/include/asm-cris/bitops.h +++ /dev/null @@ -1,166 +0,0 @@ -/* asm/bitops.h for Linux/CRIS - * - * TODO: asm versions if speed is needed - * - * All bit operations return 0 if the bit was cleared before the - * operation and != 0 if it was not. - * - * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1). - */ - -#ifndef _CRIS_BITOPS_H -#define _CRIS_BITOPS_H - -/* Currently this is unsuitable for consumption outside the kernel. */ -#ifdef __KERNEL__ - -#ifndef _LINUX_BITOPS_H -#error only <linux/bitops.h> can be included directly -#endif - -#include <asm/arch/bitops.h> -#include <asm/system.h> -#include <asm/atomic.h> -#include <linux/compiler.h> - -/* - * set_bit - Atomically set a bit in memory - * @nr: the bit to set - * @addr: the address to start counting from - * - * This function is atomic and may not be reordered. See __set_bit() - * if you do not require the atomic guarantees. - * Note that @nr may be almost arbitrarily large; this function is not - * restricted to acting on a single-word quantity. - */ - -#define set_bit(nr, addr) (void)test_and_set_bit(nr, addr) - -/* - * clear_bit - Clears a bit in memory - * @nr: Bit to clear - * @addr: Address to start counting from - * - * clear_bit() is atomic and may not be reordered. However, it does - * not contain a memory barrier, so if it is used for locking purposes, - * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit() - * in order to ensure changes are visible on other processors. - */ - -#define clear_bit(nr, addr) (void)test_and_clear_bit(nr, addr) - -/* - * change_bit - Toggle a bit in memory - * @nr: Bit to change - * @addr: Address to start counting from - * - * change_bit() is atomic and may not be reordered. - * Note that @nr may be almost arbitrarily large; this function is not - * restricted to acting on a single-word quantity. - */ - -#define change_bit(nr, addr) (void)test_and_change_bit(nr, addr) - -/** - * test_and_set_bit - Set a bit and return its old value - * @nr: Bit to set - * @addr: Address to count from - * - * This operation is atomic and cannot be reordered. - * It also implies a memory barrier. - */ - -static inline int test_and_set_bit(int nr, volatile unsigned long *addr) -{ - unsigned int mask, retval; - unsigned long flags; - unsigned int *adr = (unsigned int *)addr; - - adr += nr >> 5; - mask = 1 << (nr & 0x1f); - cris_atomic_save(addr, flags); - retval = (mask & *adr) != 0; - *adr |= mask; - cris_atomic_restore(addr, flags); - return retval; -} - -/* - * clear_bit() doesn't provide any barrier for the compiler. - */ -#define smp_mb__before_clear_bit() barrier() -#define smp_mb__after_clear_bit() barrier() - -/** - * test_and_clear_bit - Clear a bit and return its old value - * @nr: Bit to clear - * @addr: Address to count from - * - * This operation is atomic and cannot be reordered. - * It also implies a memory barrier. - */ - -static inline int test_and_clear_bit(int nr, volatile unsigned long *addr) -{ - unsigned int mask, retval; - unsigned long flags; - unsigned int *adr = (unsigned int *)addr; - - adr += nr >> 5; - mask = 1 << (nr & 0x1f); - cris_atomic_save(addr, flags); - retval = (mask & *adr) != 0; - *adr &= ~mask; - cris_atomic_restore(addr, flags); - return retval; -} - -/** - * test_and_change_bit - Change a bit and return its old value - * @nr: Bit to change - * @addr: Address to count from - * - * This operation is atomic and cannot be reordered. - * It also implies a memory barrier. - */ - -static inline int test_and_change_bit(int nr, volatile unsigned long *addr) -{ - unsigned int mask, retval; - unsigned long flags; - unsigned int *adr = (unsigned int *)addr; - adr += nr >> 5; - mask = 1 << (nr & 0x1f); - cris_atomic_save(addr, flags); - retval = (mask & *adr) != 0; - *adr ^= mask; - cris_atomic_restore(addr, flags); - return retval; -} - -#include <asm-generic/bitops/non-atomic.h> - -/* - * Since we define it "external", it collides with the built-in - * definition, which doesn't have the same semantics. We don't want to - * use -fno-builtin, so just hide the name ffs. - */ -#define ffs kernel_ffs - -#include <asm-generic/bitops/fls.h> -#include <asm-generic/bitops/fls64.h> -#include <asm-generic/bitops/hweight.h> -#include <asm-generic/bitops/find.h> -#include <asm-generic/bitops/lock.h> - -#include <asm-generic/bitops/ext2-non-atomic.h> - -#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a) -#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a) - -#include <asm-generic/bitops/minix.h> -#include <asm-generic/bitops/sched.h> - -#endif /* __KERNEL__ */ - -#endif /* _CRIS_BITOPS_H */ |