56 lines
2.3 KiB
C
56 lines
2.3 KiB
C
/*
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* Copyright (c) 2013-2014, ARM Limited and Contributors. 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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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 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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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* 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 COPYRIGHT HOLDER 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 __BAKERY_LOCK_H__
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#define __BAKERY_LOCK_H__
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#include <platform.h>
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#define BAKERY_LOCK_MAX_CPUS PLATFORM_CORE_COUNT
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#ifndef __ASSEMBLY__
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typedef struct {
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volatile int owner;
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volatile char entering[BAKERY_LOCK_MAX_CPUS];
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volatile unsigned number[BAKERY_LOCK_MAX_CPUS];
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} bakery_lock;
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#define NO_OWNER (-1)
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void bakery_lock_init(bakery_lock* bakery);
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/* Check whether a lock is held. Mainly used for debug purpose. */
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int bakery_lock_held(unsigned long mpidr, const bakery_lock * bakery);
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void bakery_lock_get(unsigned long mpidr, bakery_lock* bakery);
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void bakery_lock_release(unsigned long mpidr, bakery_lock* bakery);
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int bakery_lock_try(unsigned long mpidr, bakery_lock* bakery);
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#endif /*__ASSEMBLY__*/
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#endif /* __BAKERY_LOCK_H__ */
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