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/*
* Copyright (C) 2013, 2015 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained from Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "mali_spinlock_reentrant.h"
#include "mali_osk.h"
#include "mali_kernel_common.h"
struct mali_spinlock_reentrant *mali_spinlock_reentrant_init(_mali_osk_lock_order_t lock_order)
{
struct mali_spinlock_reentrant *spinlock;
spinlock = _mali_osk_calloc(1, sizeof(struct mali_spinlock_reentrant));
if (NULL == spinlock) {
return NULL;
}
spinlock->lock = _mali_osk_spinlock_irq_init(_MALI_OSK_LOCKFLAG_ORDERED, lock_order);
if (NULL == spinlock->lock) {
mali_spinlock_reentrant_term(spinlock);
return NULL;
}
return spinlock;
}
void mali_spinlock_reentrant_term(struct mali_spinlock_reentrant *spinlock)
{
MALI_DEBUG_ASSERT_POINTER(spinlock);
MALI_DEBUG_ASSERT(0 == spinlock->counter && 0 == spinlock->owner);
if (NULL != spinlock->lock) {
_mali_osk_spinlock_irq_term(spinlock->lock);
}
_mali_osk_free(spinlock);
}
void mali_spinlock_reentrant_wait(struct mali_spinlock_reentrant *spinlock, u32 tid)
{
MALI_DEBUG_ASSERT_POINTER(spinlock);
MALI_DEBUG_ASSERT_POINTER(spinlock->lock);
MALI_DEBUG_ASSERT(0 != tid);
MALI_DEBUG_PRINT(5, ("%s ^\n", __FUNCTION__));
if (tid != spinlock->owner) {
_mali_osk_spinlock_irq_lock(spinlock->lock);
MALI_DEBUG_ASSERT(0 == spinlock->owner && 0 == spinlock->counter);
spinlock->owner = tid;
}
MALI_DEBUG_PRINT(5, ("%s v\n", __FUNCTION__));
++spinlock->counter;
}
void mali_spinlock_reentrant_signal(struct mali_spinlock_reentrant *spinlock, u32 tid)
{
MALI_DEBUG_ASSERT_POINTER(spinlock);
MALI_DEBUG_ASSERT_POINTER(spinlock->lock);
MALI_DEBUG_ASSERT(0 != tid && tid == spinlock->owner);
--spinlock->counter;
if (0 == spinlock->counter) {
spinlock->owner = 0;
MALI_DEBUG_PRINT(5, ("%s release last\n", __FUNCTION__));
_mali_osk_spinlock_irq_unlock(spinlock->lock);
}
}
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