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634ec6c23b
The bakery lock code currently expects the calling code to pass the MPIDR_EL1 of the current CPU. This is not always done correctly. Also the change to provide inline access to system registers makes it more efficient for the bakery lock code to obtain the MPIDR_EL1 directly. This change removes the mpidr parameter from the bakery lock interface, and results in a code reduction of 160 bytes for the ARM FVP port. Fixes ARM-software/tf-issues#213 Change-Id: I7ec7bd117bcc9794a0d948990fcf3336a367d543
52 lines
2.0 KiB
C
52 lines
2.0 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_def.h>
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#define BAKERY_LOCK_MAX_CPUS PLATFORM_CORE_COUNT
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typedef struct bakery_lock {
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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_t;
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#define NO_OWNER (-1)
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void bakery_lock_init(bakery_lock_t *bakery);
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void bakery_lock_get(bakery_lock_t *bakery);
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void bakery_lock_release(bakery_lock_t *bakery);
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int bakery_lock_try(bakery_lock_t *bakery);
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#endif /* __BAKERY_LOCK_H__ */
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