93f81bd490
repo: https://github.com/T-head-Semi/opensbi commit: 89182b257c8798e15e4c685c1af0c2862d528d2a Change-Id: I7b39d66729e0108661a6f4c9e28acbdb303684ea
46 lines
843 B
C
46 lines
843 B
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2019 Western Digital Corporation or its affiliates.
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* Copyright (c) 2021 Christoph Müllner <cmuellner@linux.com>
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*/
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#ifndef __RISCV_LOCKS_H__
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#define __RISCV_LOCKS_H__
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#include <sbi/sbi_types.h>
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#define TICKET_SHIFT 16
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typedef struct {
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#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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u16 next;
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u16 owner;
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#else
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u16 owner;
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u16 next;
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#endif
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} __aligned(4) spinlock_t;
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#define __SPIN_LOCK_UNLOCKED \
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(spinlock_t) { 0, 0 }
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#define SPIN_LOCK_INIT(x) \
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x = __SPIN_LOCK_UNLOCKED
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#define SPIN_LOCK_INITIALIZER \
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__SPIN_LOCK_UNLOCKED
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#define DEFINE_SPIN_LOCK(x) \
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spinlock_t SPIN_LOCK_INIT(x)
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int spin_lock_check(spinlock_t *lock);
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int spin_trylock(spinlock_t *lock);
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void spin_lock(spinlock_t *lock);
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void spin_unlock(spinlock_t *lock);
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#endif
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