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eal/ppc: spinlock operations for IBM Power

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This patch adds spinlock operations for IBM Power architecture.

Signed-off-by: Chao Zhu <chaozhu@linux.vnet.ibm.com>
Acked-by: David Marchand <david.marchand@6wind.com>
This commit is contained in:
Chao Zhu 2014-11-25 17:17:09 -05:00 committed by Thomas Monjalon
parent 529c7f5c8c
commit d464c8af66
1 changed files with 73 additions and 0 deletions
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73
lib/librte_eal/common/include/arch/ppc_64/rte_spinlock.h Normal file
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/*
* BSD LICENSE
*
* Copyright (C) IBM Corporation 2014.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of IBM Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RTE_SPINLOCK_PPC_64_H_
#define _RTE_SPINLOCK_PPC_64_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <rte_common.h>
#include "generic/rte_spinlock.h"
/* Fixme: Use intrinsics to implement the spinlock on Power architecture */
#ifndef RTE_FORCE_INTRINSICS
static inline void
rte_spinlock_lock(rte_spinlock_t *sl)
{
while (__sync_lock_test_and_set(&sl->locked, 1))
while (sl->locked)
rte_pause();
}
static inline void
rte_spinlock_unlock(rte_spinlock_t *sl)
{
__sync_lock_release(&sl->locked);
}
static inline int
rte_spinlock_trylock(rte_spinlock_t *sl)
{
return (__sync_lock_test_and_set(&sl->locked, 1) == 0);
}
#endif
#ifdef __cplusplus
}
#endif
#endif /* _RTE_SPINLOCK_PPC_64_H_ */