211 lines
8.3 KiB
C
211 lines
8.3 KiB
C
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/*
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* Based on arch/arm/include/asm/atomic.h
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*
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* Copyright (C) 1996 Russell King.
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* Copyright (C) 2002 Deep Blue Solutions Ltd.
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* Copyright (C) 2012 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ASM_ATOMIC_H
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#define __ASM_ATOMIC_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include <asm/barrier.h>
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#include <asm/lse.h>
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#ifdef __KERNEL__
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#define __ARM64_IN_ATOMIC_IMPL
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#if defined(CONFIG_ARM64_LSE_ATOMICS) && defined(CONFIG_AS_LSE)
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#include <asm/atomic_lse.h>
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#else
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#include <asm/atomic_ll_sc.h>
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#endif
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#undef __ARM64_IN_ATOMIC_IMPL
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#include <asm/cmpxchg.h>
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#define ___atomic_add_unless(v, a, u, sfx) \
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({ \
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typeof((v)->counter) c, old; \
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\
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c = atomic##sfx##_read(v); \
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while (c != (u) && \
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(old = atomic##sfx##_cmpxchg((v), c, c + (a))) != c) \
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c = old; \
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c; \
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})
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#define ATOMIC_INIT(i) { (i) }
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#define atomic_read(v) READ_ONCE((v)->counter)
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#define atomic_set(v, i) WRITE_ONCE(((v)->counter), (i))
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#define atomic_add_return_relaxed atomic_add_return_relaxed
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#define atomic_add_return_acquire atomic_add_return_acquire
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#define atomic_add_return_release atomic_add_return_release
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#define atomic_add_return atomic_add_return
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#define atomic_inc_return_relaxed(v) atomic_add_return_relaxed(1, (v))
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#define atomic_inc_return_acquire(v) atomic_add_return_acquire(1, (v))
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#define atomic_inc_return_release(v) atomic_add_return_release(1, (v))
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#define atomic_inc_return(v) atomic_add_return(1, (v))
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#define atomic_sub_return_relaxed atomic_sub_return_relaxed
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#define atomic_sub_return_acquire atomic_sub_return_acquire
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#define atomic_sub_return_release atomic_sub_return_release
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#define atomic_sub_return atomic_sub_return
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#define atomic_dec_return_relaxed(v) atomic_sub_return_relaxed(1, (v))
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#define atomic_dec_return_acquire(v) atomic_sub_return_acquire(1, (v))
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#define atomic_dec_return_release(v) atomic_sub_return_release(1, (v))
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#define atomic_dec_return(v) atomic_sub_return(1, (v))
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#define atomic_fetch_add_relaxed atomic_fetch_add_relaxed
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#define atomic_fetch_add_acquire atomic_fetch_add_acquire
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#define atomic_fetch_add_release atomic_fetch_add_release
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#define atomic_fetch_add atomic_fetch_add
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#define atomic_fetch_sub_relaxed atomic_fetch_sub_relaxed
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#define atomic_fetch_sub_acquire atomic_fetch_sub_acquire
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#define atomic_fetch_sub_release atomic_fetch_sub_release
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#define atomic_fetch_sub atomic_fetch_sub
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#define atomic_fetch_and_relaxed atomic_fetch_and_relaxed
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#define atomic_fetch_and_acquire atomic_fetch_and_acquire
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#define atomic_fetch_and_release atomic_fetch_and_release
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#define atomic_fetch_and atomic_fetch_and
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#define atomic_fetch_andnot_relaxed atomic_fetch_andnot_relaxed
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#define atomic_fetch_andnot_acquire atomic_fetch_andnot_acquire
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#define atomic_fetch_andnot_release atomic_fetch_andnot_release
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#define atomic_fetch_andnot atomic_fetch_andnot
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#define atomic_fetch_or_relaxed atomic_fetch_or_relaxed
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#define atomic_fetch_or_acquire atomic_fetch_or_acquire
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#define atomic_fetch_or_release atomic_fetch_or_release
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#define atomic_fetch_or atomic_fetch_or
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#define atomic_fetch_xor_relaxed atomic_fetch_xor_relaxed
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#define atomic_fetch_xor_acquire atomic_fetch_xor_acquire
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#define atomic_fetch_xor_release atomic_fetch_xor_release
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#define atomic_fetch_xor atomic_fetch_xor
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#define atomic_xchg_relaxed(v, new) xchg_relaxed(&((v)->counter), (new))
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#define atomic_xchg_acquire(v, new) xchg_acquire(&((v)->counter), (new))
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#define atomic_xchg_release(v, new) xchg_release(&((v)->counter), (new))
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#define atomic_xchg(v, new) xchg(&((v)->counter), (new))
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#define atomic_cmpxchg_relaxed(v, old, new) \
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cmpxchg_relaxed(&((v)->counter), (old), (new))
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#define atomic_cmpxchg_acquire(v, old, new) \
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cmpxchg_acquire(&((v)->counter), (old), (new))
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#define atomic_cmpxchg_release(v, old, new) \
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cmpxchg_release(&((v)->counter), (old), (new))
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#define atomic_cmpxchg(v, old, new) cmpxchg(&((v)->counter), (old), (new))
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#define atomic_inc(v) atomic_add(1, (v))
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#define atomic_dec(v) atomic_sub(1, (v))
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#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
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#define atomic_dec_and_test(v) (atomic_dec_return(v) == 0)
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#define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0)
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#define atomic_add_negative(i, v) (atomic_add_return((i), (v)) < 0)
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#define __atomic_add_unless(v, a, u) ___atomic_add_unless(v, a, u,)
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#define atomic_andnot atomic_andnot
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/*
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* 64-bit atomic operations.
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*/
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#define ATOMIC64_INIT ATOMIC_INIT
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#define atomic64_read atomic_read
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#define atomic64_set atomic_set
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#define atomic64_add_return_relaxed atomic64_add_return_relaxed
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#define atomic64_add_return_acquire atomic64_add_return_acquire
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#define atomic64_add_return_release atomic64_add_return_release
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#define atomic64_add_return atomic64_add_return
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#define atomic64_inc_return_relaxed(v) atomic64_add_return_relaxed(1, (v))
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#define atomic64_inc_return_acquire(v) atomic64_add_return_acquire(1, (v))
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#define atomic64_inc_return_release(v) atomic64_add_return_release(1, (v))
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#define atomic64_inc_return(v) atomic64_add_return(1, (v))
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#define atomic64_sub_return_relaxed atomic64_sub_return_relaxed
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#define atomic64_sub_return_acquire atomic64_sub_return_acquire
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#define atomic64_sub_return_release atomic64_sub_return_release
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#define atomic64_sub_return atomic64_sub_return
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#define atomic64_dec_return_relaxed(v) atomic64_sub_return_relaxed(1, (v))
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#define atomic64_dec_return_acquire(v) atomic64_sub_return_acquire(1, (v))
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#define atomic64_dec_return_release(v) atomic64_sub_return_release(1, (v))
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#define atomic64_dec_return(v) atomic64_sub_return(1, (v))
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#define atomic64_fetch_add_relaxed atomic64_fetch_add_relaxed
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#define atomic64_fetch_add_acquire atomic64_fetch_add_acquire
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#define atomic64_fetch_add_release atomic64_fetch_add_release
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#define atomic64_fetch_add atomic64_fetch_add
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#define atomic64_fetch_sub_relaxed atomic64_fetch_sub_relaxed
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#define atomic64_fetch_sub_acquire atomic64_fetch_sub_acquire
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#define atomic64_fetch_sub_release atomic64_fetch_sub_release
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#define atomic64_fetch_sub atomic64_fetch_sub
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#define atomic64_fetch_and_relaxed atomic64_fetch_and_relaxed
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#define atomic64_fetch_and_acquire atomic64_fetch_and_acquire
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#define atomic64_fetch_and_release atomic64_fetch_and_release
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#define atomic64_fetch_and atomic64_fetch_and
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#define atomic64_fetch_andnot_relaxed atomic64_fetch_andnot_relaxed
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#define atomic64_fetch_andnot_acquire atomic64_fetch_andnot_acquire
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#define atomic64_fetch_andnot_release atomic64_fetch_andnot_release
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#define atomic64_fetch_andnot atomic64_fetch_andnot
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#define atomic64_fetch_or_relaxed atomic64_fetch_or_relaxed
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#define atomic64_fetch_or_acquire atomic64_fetch_or_acquire
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#define atomic64_fetch_or_release atomic64_fetch_or_release
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#define atomic64_fetch_or atomic64_fetch_or
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#define atomic64_fetch_xor_relaxed atomic64_fetch_xor_relaxed
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#define atomic64_fetch_xor_acquire atomic64_fetch_xor_acquire
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#define atomic64_fetch_xor_release atomic64_fetch_xor_release
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#define atomic64_fetch_xor atomic64_fetch_xor
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#define atomic64_xchg_relaxed atomic_xchg_relaxed
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#define atomic64_xchg_acquire atomic_xchg_acquire
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#define atomic64_xchg_release atomic_xchg_release
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#define atomic64_xchg atomic_xchg
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#define atomic64_cmpxchg_relaxed atomic_cmpxchg_relaxed
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#define atomic64_cmpxchg_acquire atomic_cmpxchg_acquire
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#define atomic64_cmpxchg_release atomic_cmpxchg_release
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#define atomic64_cmpxchg atomic_cmpxchg
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#define atomic64_inc(v) atomic64_add(1, (v))
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#define atomic64_dec(v) atomic64_sub(1, (v))
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#define atomic64_inc_and_test(v) (atomic64_inc_return(v) == 0)
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#define atomic64_dec_and_test(v) (atomic64_dec_return(v) == 0)
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#define atomic64_sub_and_test(i, v) (atomic64_sub_return((i), (v)) == 0)
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#define atomic64_add_negative(i, v) (atomic64_add_return((i), (v)) < 0)
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#define atomic64_add_unless(v, a, u) (___atomic_add_unless(v, a, u, 64) != u)
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#define atomic64_andnot atomic64_andnot
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#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
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#endif
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#endif
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