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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atomic64.h (2549B)


      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * Generic implementation of 64-bit atomics using spinlocks,
      4 * useful on processors that don't have 64-bit atomic instructions.
      5 *
      6 * Copyright © 2009 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
      7 */
      8#ifndef _ASM_GENERIC_ATOMIC64_H
      9#define _ASM_GENERIC_ATOMIC64_H
     10#include <linux/types.h>
     11
     12typedef struct {
     13	s64 counter;
     14} atomic64_t;
     15
     16#define ATOMIC64_INIT(i)	{ (i) }
     17
     18extern s64 generic_atomic64_read(const atomic64_t *v);
     19extern void generic_atomic64_set(atomic64_t *v, s64 i);
     20
     21#define ATOMIC64_OP(op)							\
     22extern void generic_atomic64_##op(s64 a, atomic64_t *v);
     23
     24#define ATOMIC64_OP_RETURN(op)						\
     25extern s64 generic_atomic64_##op##_return(s64 a, atomic64_t *v);
     26
     27#define ATOMIC64_FETCH_OP(op)						\
     28extern s64 generic_atomic64_fetch_##op(s64 a, atomic64_t *v);
     29
     30#define ATOMIC64_OPS(op)	ATOMIC64_OP(op) ATOMIC64_OP_RETURN(op) ATOMIC64_FETCH_OP(op)
     31
     32ATOMIC64_OPS(add)
     33ATOMIC64_OPS(sub)
     34
     35#undef ATOMIC64_OPS
     36#define ATOMIC64_OPS(op)	ATOMIC64_OP(op) ATOMIC64_FETCH_OP(op)
     37
     38ATOMIC64_OPS(and)
     39ATOMIC64_OPS(or)
     40ATOMIC64_OPS(xor)
     41
     42#undef ATOMIC64_OPS
     43#undef ATOMIC64_FETCH_OP
     44#undef ATOMIC64_OP_RETURN
     45#undef ATOMIC64_OP
     46
     47extern s64 generic_atomic64_dec_if_positive(atomic64_t *v);
     48extern s64 generic_atomic64_cmpxchg(atomic64_t *v, s64 o, s64 n);
     49extern s64 generic_atomic64_xchg(atomic64_t *v, s64 new);
     50extern s64 generic_atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u);
     51
     52#define arch_atomic64_read		generic_atomic64_read
     53#define arch_atomic64_set		generic_atomic64_set
     54#define arch_atomic64_set_release	generic_atomic64_set
     55
     56#define arch_atomic64_add		generic_atomic64_add
     57#define arch_atomic64_add_return	generic_atomic64_add_return
     58#define arch_atomic64_fetch_add		generic_atomic64_fetch_add
     59#define arch_atomic64_sub		generic_atomic64_sub
     60#define arch_atomic64_sub_return	generic_atomic64_sub_return
     61#define arch_atomic64_fetch_sub		generic_atomic64_fetch_sub
     62
     63#define arch_atomic64_and		generic_atomic64_and
     64#define arch_atomic64_fetch_and		generic_atomic64_fetch_and
     65#define arch_atomic64_or		generic_atomic64_or
     66#define arch_atomic64_fetch_or		generic_atomic64_fetch_or
     67#define arch_atomic64_xor		generic_atomic64_xor
     68#define arch_atomic64_fetch_xor		generic_atomic64_fetch_xor
     69
     70#define arch_atomic64_dec_if_positive	generic_atomic64_dec_if_positive
     71#define arch_atomic64_cmpxchg		generic_atomic64_cmpxchg
     72#define arch_atomic64_xchg		generic_atomic64_xchg
     73#define arch_atomic64_fetch_add_unless	generic_atomic64_fetch_add_unless
     74
     75#endif  /*  _ASM_GENERIC_ATOMIC64_H  */