cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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atomic_64.h (1849B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/* atomic.h: Thankfully the V9 is at least reasonable for this
      3 *           stuff.
      4 *
      5 * Copyright (C) 1996, 1997, 2000, 2012 David S. Miller (davem@redhat.com)
      6 */
      7
      8#ifndef __ARCH_SPARC64_ATOMIC__
      9#define __ARCH_SPARC64_ATOMIC__
     10
     11#include <linux/types.h>
     12#include <asm/cmpxchg.h>
     13#include <asm/barrier.h>
     14
     15#define ATOMIC64_INIT(i)	{ (i) }
     16
     17#define arch_atomic_read(v)	READ_ONCE((v)->counter)
     18#define arch_atomic64_read(v)	READ_ONCE((v)->counter)
     19
     20#define arch_atomic_set(v, i)	WRITE_ONCE(((v)->counter), (i))
     21#define arch_atomic64_set(v, i)	WRITE_ONCE(((v)->counter), (i))
     22
     23#define ATOMIC_OP(op)							\
     24void arch_atomic_##op(int, atomic_t *);					\
     25void arch_atomic64_##op(s64, atomic64_t *);
     26
     27#define ATOMIC_OP_RETURN(op)						\
     28int arch_atomic_##op##_return(int, atomic_t *);				\
     29s64 arch_atomic64_##op##_return(s64, atomic64_t *);
     30
     31#define ATOMIC_FETCH_OP(op)						\
     32int arch_atomic_fetch_##op(int, atomic_t *);				\
     33s64 arch_atomic64_fetch_##op(s64, atomic64_t *);
     34
     35#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op)
     36
     37ATOMIC_OPS(add)
     38ATOMIC_OPS(sub)
     39
     40#undef ATOMIC_OPS
     41#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
     42
     43ATOMIC_OPS(and)
     44ATOMIC_OPS(or)
     45ATOMIC_OPS(xor)
     46
     47#undef ATOMIC_OPS
     48#undef ATOMIC_FETCH_OP
     49#undef ATOMIC_OP_RETURN
     50#undef ATOMIC_OP
     51
     52#define arch_atomic_cmpxchg(v, o, n) (arch_cmpxchg(&((v)->counter), (o), (n)))
     53
     54static inline int arch_atomic_xchg(atomic_t *v, int new)
     55{
     56	return arch_xchg(&v->counter, new);
     57}
     58
     59#define arch_atomic64_cmpxchg(v, o, n) \
     60	((__typeof__((v)->counter))arch_cmpxchg(&((v)->counter), (o), (n)))
     61#define arch_atomic64_xchg(v, new) (arch_xchg(&((v)->counter), new))
     62
     63s64 arch_atomic64_dec_if_positive(atomic64_t *v);
     64#define arch_atomic64_dec_if_positive arch_atomic64_dec_if_positive
     65
     66#endif /* !(__ARCH_SPARC64_ATOMIC__) */