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/**
* @file
*
* @ingroup RTEMSBSPsPowerPCQorIQInterCom
*
* @brief qoriq_spin_lock() and qoriq_spin_unlock() implementation.
*/
/*
* Copyright (c) 2011 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <libcpu/powerpc-utility.h>
.global qoriq_spin_lock
.global qoriq_spin_unlock
qoriq_spin_lock:
li r0, 1
mfmsr r4
GET_INTERRUPT_MASK r5
andc r5, r4, r5
b 2f
1:
mtmsr r4
2:
lwarx r6, r0, r3
cmpwi r6, 0
bne 2b
mtmsr r5
stwcx. r0, r0, r3
bne 1b
isync
mr r3, r4
blr
qoriq_spin_unlock:
msync
li r0, 0
stw r0, 0(r3)
mtmsr r4
blr
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