/*
 * Based on arch/arm/include/asm/atomic.h
 *
 * Copyright (C) 1996 Russell King.
 * Copyright (C) 2002 Deep Blue Solutions Ltd.
 * Copyright (C) 2012 ARM Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASM_ATOMIC_H
#define __ASM_ATOMIC_H

#include <linux/compiler.h>
#include <linux/types.h>

#include <asm/barrier.h>
#include <asm/lse.h>

#ifdef __KERNEL__

#define __ARM64_IN_ATOMIC_IMPL

#if defined(CONFIG_ARM64_LSE_ATOMICS) && defined(CONFIG_AS_LSE)
#include <asm/atomic_lse.h>
#else
#include <asm/atomic_ll_sc.h>
#endif

#undef __ARM64_IN_ATOMIC_IMPL

#include <asm/cmpxchg.h>

#define ___atomic_add_unless(v, a, u, sfx)                              \
({                                                                      \
        typeof((v)->counter) c, old;                                    \
                                                                        \
        c = atomic##sfx##_read(v);                                      \
        while (c != (u) &&                                              \
              (old = atomic##sfx##_cmpxchg((v), c, c + (a))) != c)      \
                c = old;                                                \
        c;                                                              \
 })

#define ATOMIC_INIT(i)  { (i) }

#define atomic_read(v)                  READ_ONCE((v)->counter)
#define atomic_set(v, i)                WRITE_ONCE(((v)->counter), (i))

#define atomic_add_return_relaxed       atomic_add_return_relaxed
#define atomic_add_return_acquire       atomic_add_return_acquire
#define atomic_add_return_release       atomic_add_return_release
#define atomic_add_return               atomic_add_return

#define atomic_inc_return_relaxed(v)    atomic_add_return_relaxed(1, (v))
#define atomic_inc_return_acquire(v)    atomic_add_return_acquire(1, (v))
#define atomic_inc_return_release(v)    atomic_add_return_release(1, (v))
#define atomic_inc_return(v)            atomic_add_return(1, (v))

#define atomic_sub_return_relaxed       atomic_sub_return_relaxed
#define atomic_sub_return_acquire       atomic_sub_return_acquire
#define atomic_sub_return_release       atomic_sub_return_release
#define atomic_sub_return               atomic_sub_return

#define atomic_dec_return_relaxed(v)    atomic_sub_return_relaxed(1, (v))
#define atomic_dec_return_acquire(v)    atomic_sub_return_acquire(1, (v))
#define atomic_dec_return_release(v)    atomic_sub_return_release(1, (v))
#define atomic_dec_return(v)            atomic_sub_return(1, (v))

#define atomic_fetch_add_relaxed        atomic_fetch_add_relaxed
#define atomic_fetch_add_acquire        atomic_fetch_add_acquire
#define atomic_fetch_add_release        atomic_fetch_add_release
#define atomic_fetch_add                atomic_fetch_add

#define atomic_fetch_sub_relaxed        atomic_fetch_sub_relaxed
#define atomic_fetch_sub_acquire        atomic_fetch_sub_acquire
#define atomic_fetch_sub_release        atomic_fetch_sub_release
#define atomic_fetch_sub                atomic_fetch_sub

#define atomic_fetch_and_relaxed        atomic_fetch_and_relaxed
#define atomic_fetch_and_acquire        atomic_fetch_and_acquire
#define atomic_fetch_and_release        atomic_fetch_and_release
#define atomic_fetch_and                atomic_fetch_and

#define atomic_fetch_andnot_relaxed     atomic_fetch_andnot_relaxed
#define atomic_fetch_andnot_acquire     atomic_fetch_andnot_acquire
#define atomic_fetch_andnot_release     atomic_fetch_andnot_release
#define atomic_fetch_andnot             atomic_fetch_andnot

#define atomic_fetch_or_relaxed         atomic_fetch_or_relaxed
#define atomic_fetch_or_acquire         atomic_fetch_or_acquire
#define atomic_fetch_or_release         atomic_fetch_or_release
#define atomic_fetch_or                 atomic_fetch_or

#define atomic_fetch_xor_relaxed        atomic_fetch_xor_relaxed
#define atomic_fetch_xor_acquire        atomic_fetch_xor_acquire
#define atomic_fetch_xor_release        atomic_fetch_xor_release
#define atomic_fetch_xor                atomic_fetch_xor

#define atomic_xchg_relaxed(v, new)     xchg_relaxed(&((v)->counter), (new))
#define atomic_xchg_acquire(v, new)     xchg_acquire(&((v)->counter), (new))
#define atomic_xchg_release(v, new)     xchg_release(&((v)->counter), (new))
#define atomic_xchg(v, new)             xchg(&((v)->counter), (new))

#define atomic_cmpxchg_relaxed(v, old, new)                             \
        cmpxchg_relaxed(&((v)->counter), (old), (new))
#define atomic_cmpxchg_acquire(v, old, new)                             \
        cmpxchg_acquire(&((v)->counter), (old), (new))
#define atomic_cmpxchg_release(v, old, new)                             \
        cmpxchg_release(&((v)->counter), (old), (new))
#define atomic_cmpxchg(v, old, new)     cmpxchg(&((v)->counter), (old), (new))

#define atomic_inc(v)                   atomic_add(1, (v))
#define atomic_dec(v)                   atomic_sub(1, (v))
#define atomic_inc_and_test(v)          (atomic_inc_return(v) == 0)
#define atomic_dec_and_test(v)          (atomic_dec_return(v) == 0)
#define atomic_sub_and_test(i, v)       (atomic_sub_return((i), (v)) == 0)
#define atomic_add_negative(i, v)       (atomic_add_return((i), (v)) < 0)
#define __atomic_add_unless(v, a, u)    ___atomic_add_unless(v, a, u,)
#define atomic_andnot                   atomic_andnot

/*
 * 64-bit atomic operations.
 */
#define ATOMIC64_INIT                   ATOMIC_INIT
#define atomic64_read                   atomic_read
#define atomic64_set                    atomic_set

#define atomic64_add_return_relaxed     atomic64_add_return_relaxed
#define atomic64_add_return_acquire     atomic64_add_return_acquire
#define atomic64_add_return_release     atomic64_add_return_release
#define atomic64_add_return             atomic64_add_return

#define atomic64_inc_return_relaxed(v)  atomic64_add_return_relaxed(1, (v))
#define atomic64_inc_return_acquire(v)  atomic64_add_return_acquire(1, (v))
#define atomic64_inc_return_release(v)  atomic64_add_return_release(1, (v))
#define atomic64_inc_return(v)          atomic64_add_return(1, (v))

#define atomic64_sub_return_relaxed     atomic64_sub_return_relaxed
#define atomic64_sub_return_acquire     atomic64_sub_return_acquire
#define atomic64_sub_return_release     atomic64_sub_return_release
#define atomic64_sub_return             atomic64_sub_return

#define atomic64_dec_return_relaxed(v)  atomic64_sub_return_relaxed(1, (v))
#define atomic64_dec_return_acquire(v)  atomic64_sub_return_acquire(1, (v))
#define atomic64_dec_return_release(v)  atomic64_sub_return_release(1, (v))
#define atomic64_dec_return(v)          atomic64_sub_return(1, (v))

#define atomic64_fetch_add_relaxed      atomic64_fetch_add_relaxed
#define atomic64_fetch_add_acquire      atomic64_fetch_add_acquire
#define atomic64_fetch_add_release      atomic64_fetch_add_release
#define atomic64_fetch_add              atomic64_fetch_add

#define atomic64_fetch_sub_relaxed      atomic64_fetch_sub_relaxed
#define atomic64_fetch_sub_acquire      atomic64_fetch_sub_acquire
#define atomic64_fetch_sub_release      atomic64_fetch_sub_release
#define atomic64_fetch_sub              atomic64_fetch_sub

#define atomic64_fetch_and_relaxed      atomic64_fetch_and_relaxed
#define atomic64_fetch_and_acquire      atomic64_fetch_and_acquire
#define atomic64_fetch_and_release      atomic64_fetch_and_release
#define atomic64_fetch_and              atomic64_fetch_and

#define atomic64_fetch_andnot_relaxed   atomic64_fetch_andnot_relaxed
#define atomic64_fetch_andnot_acquire   atomic64_fetch_andnot_acquire
#define atomic64_fetch_andnot_release   atomic64_fetch_andnot_release
#define atomic64_fetch_andnot           atomic64_fetch_andnot

#define atomic64_fetch_or_relaxed       atomic64_fetch_or_relaxed
#define atomic64_fetch_or_acquire       atomic64_fetch_or_acquire
#define atomic64_fetch_or_release       atomic64_fetch_or_release
#define atomic64_fetch_or               atomic64_fetch_or

#define atomic64_fetch_xor_relaxed      atomic64_fetch_xor_relaxed
#define atomic64_fetch_xor_acquire      atomic64_fetch_xor_acquire
#define atomic64_fetch_xor_release      atomic64_fetch_xor_release
#define atomic64_fetch_xor              atomic64_fetch_xor

#define atomic64_xchg_relaxed           atomic_xchg_relaxed
#define atomic64_xchg_acquire           atomic_xchg_acquire
#define atomic64_xchg_release           atomic_xchg_release
#define atomic64_xchg                   atomic_xchg

#define atomic64_cmpxchg_relaxed        atomic_cmpxchg_relaxed
#define atomic64_cmpxchg_acquire        atomic_cmpxchg_acquire
#define atomic64_cmpxchg_release        atomic_cmpxchg_release
#define atomic64_cmpxchg                atomic_cmpxchg

#define atomic64_inc(v)                 atomic64_add(1, (v))
#define atomic64_dec(v)                 atomic64_sub(1, (v))
#define atomic64_inc_and_test(v)        (atomic64_inc_return(v) == 0)
#define atomic64_dec_and_test(v)        (atomic64_dec_return(v) == 0)
#define atomic64_sub_and_test(i, v)     (atomic64_sub_return((i), (v)) == 0)
#define atomic64_add_negative(i, v)     (atomic64_add_return((i), (v)) < 0)
#define atomic64_add_unless(v, a, u)    (___atomic_add_unless(v, a, u, 64) != u)
#define atomic64_andnot                 atomic64_andnot

#define atomic64_inc_not_zero(v)        atomic64_add_unless((v), 1, 0)

#endif
#endif