128 lines
2.5 KiB
C
128 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_METAG_BITOPS_H
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#define __ASM_METAG_BITOPS_H
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#include <linux/compiler.h>
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#include <asm/barrier.h>
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#include <asm/global_lock.h>
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#ifdef CONFIG_SMP
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/*
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* These functions are the basis of our bit ops.
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*/
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static inline void set_bit(unsigned int bit, volatile unsigned long *p)
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{
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unsigned long flags;
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unsigned long mask = 1UL << (bit & 31);
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p += bit >> 5;
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__global_lock1(flags);
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fence();
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*p |= mask;
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__global_unlock1(flags);
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}
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static inline void clear_bit(unsigned int bit, volatile unsigned long *p)
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{
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unsigned long flags;
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unsigned long mask = 1UL << (bit & 31);
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p += bit >> 5;
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__global_lock1(flags);
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fence();
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*p &= ~mask;
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__global_unlock1(flags);
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}
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static inline void change_bit(unsigned int bit, volatile unsigned long *p)
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{
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unsigned long flags;
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unsigned long mask = 1UL << (bit & 31);
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p += bit >> 5;
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__global_lock1(flags);
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fence();
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*p ^= mask;
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__global_unlock1(flags);
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}
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static inline int test_and_set_bit(unsigned int bit, volatile unsigned long *p)
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{
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unsigned long flags;
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unsigned long old;
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unsigned long mask = 1UL << (bit & 31);
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p += bit >> 5;
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__global_lock1(flags);
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old = *p;
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if (!(old & mask)) {
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fence();
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*p = old | mask;
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}
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__global_unlock1(flags);
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return (old & mask) != 0;
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}
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static inline int test_and_clear_bit(unsigned int bit,
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volatile unsigned long *p)
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{
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unsigned long flags;
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unsigned long old;
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unsigned long mask = 1UL << (bit & 31);
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p += bit >> 5;
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__global_lock1(flags);
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old = *p;
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if (old & mask) {
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fence();
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*p = old & ~mask;
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}
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__global_unlock1(flags);
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return (old & mask) != 0;
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}
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static inline int test_and_change_bit(unsigned int bit,
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volatile unsigned long *p)
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{
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unsigned long flags;
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unsigned long old;
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unsigned long mask = 1UL << (bit & 31);
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p += bit >> 5;
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__global_lock1(flags);
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fence();
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old = *p;
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*p = old ^ mask;
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__global_unlock1(flags);
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return (old & mask) != 0;
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}
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#else
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#include <asm-generic/bitops/atomic.h>
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#endif /* CONFIG_SMP */
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#include <asm-generic/bitops/non-atomic.h>
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#include <asm-generic/bitops/find.h>
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#include <asm-generic/bitops/ffs.h>
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#include <asm-generic/bitops/__ffs.h>
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#include <asm-generic/bitops/ffz.h>
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#include <asm-generic/bitops/fls.h>
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#include <asm-generic/bitops/__fls.h>
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#include <asm-generic/bitops/fls64.h>
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#include <asm-generic/bitops/hweight.h>
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#include <asm-generic/bitops/lock.h>
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#include <asm-generic/bitops/sched.h>
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#include <asm-generic/bitops/le.h>
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#include <asm-generic/bitops/ext2-atomic.h>
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#endif /* __ASM_METAG_BITOPS_H */
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