diff options
Diffstat (limited to 'c/src/lib/libbsp/sparc/leon3/shmsupp/lock.c')
| -rw-r--r-- | c/src/lib/libbsp/sparc/leon3/shmsupp/lock.c | 25 |
1 files changed, 10 insertions, 15 deletions
diff --git a/c/src/lib/libbsp/sparc/leon3/shmsupp/lock.c b/c/src/lib/libbsp/sparc/leon3/shmsupp/lock.c index be3f64dbd9..91e0b6de98 100644 --- a/c/src/lib/libbsp/sparc/leon3/shmsupp/lock.c +++ b/c/src/lib/libbsp/sparc/leon3/shmsupp/lock.c @@ -1,12 +1,17 @@ -/* Shared Memory Lock Routines +/** + * @file + * + * LEON3 Shared Memory Lock Routines * * This shared memory locked queue support routine need to be * able to lock the specified locked queue. Interrupts are * disabled while the queue is locked to prevent preemption * and deadlock when two tasks poll for the same lock. * previous level. - * - * COPYRIGHT (c) 1989-1999. + */ + +/* + * COPYRIGHT (c) 1989-2012. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be @@ -20,11 +25,8 @@ /* - * Shm_Initialize_lock - * * Initialize the lock for the specified locked queue. */ - void Shm_Initialize_lock( Shm_Locked_queue_Control *lq_cb ) @@ -32,12 +34,12 @@ void Shm_Initialize_lock( lq_cb->lock = LQ_UNLOCKED; } -/* void _Shm_Lock( &lq_cb ) - * +/* * This shared memory locked queue support routine locks the * specified locked queue. It disables interrupts to prevent * a deadlock condition. */ +extern unsigned int LEON3_Atomic_Swap(uint32_t value, uint32_t *address); __asm__ ( ".text\n" @@ -63,16 +65,9 @@ void Shm_Lock( Shm_isrstat = isr_level; while ( lock_value ) { lock_value = LEON3_Atomic_Swap(lock_value, lockptr); -/* __asm__ volatile( "" */ -/* : "=r" (lockptr), "=r" (lock_value) */ -/* : "0" (lockptr), "1" (lock_value) */ -/* ); */ /* * If not available, then may want to delay to reduce load on lock. */ - -/* if ( lock_value ) */ -/* rtems_bsp_delay( 10 ); /\* approximately 10 microseconds *\/ */ } } |