61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
/*
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* Copyright (c) 2016, Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of the Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INTEL CORPORATION OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __SPINLOCK_H__
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#define __SPINLOCK_H__
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#include "qm_soc_regs.h"
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/*
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* Single, shared spinlock which can be used for synchronization between the
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* Lakemont and ARC cores.
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* The Spinlock lock size and position in RAM must be same on both cores.
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*/
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#if (QUARK_SE)
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typedef struct {
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volatile char flag[2];
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volatile char turn;
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} spinlock_t;
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extern spinlock_t __esram_lock_start;
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void spinlock_lock(spinlock_t *lock);
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void spinlock_unlock(spinlock_t *lock);
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#define QM_SPINLOCK_LOCK() spinlock_lock(&__esram_lock_start)
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#define QM_SPINLOCK_UNLOCK() spinlock_unlock(&__esram_lock_start)
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#else
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#define QM_SPINLOCK_LOCK()
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#define QM_SPINLOCK_UNLOCK()
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#endif /* defined(QM_QUARK_SE) */
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#endif /* __SPINLOCK_H__ */
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