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author | Aun-Ali Zaidi <admin@kodeit.net> | 2015-12-08 13:51:44 -0600 |
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committer | Joel Sherrill <joel.sherrill@oarcorp.com> | 2015-12-08 14:02:43 -0600 |
commit | 9ae2d98866cace349fc40feac8cf0e8895d9c699 (patch) | |
tree | f4d38c348718f2c1d877c3473a13305c6cf0866d /c/src/lib/libbsp/m68k/mvme136/shmsupp/lock.c | |
parent | Add RTEMS linker sets (diff) | |
download | rtems-9ae2d98866cace349fc40feac8cf0e8895d9c699.tar.bz2 |
m68k/mvme136: Remove
closes #2444.
Diffstat (limited to 'c/src/lib/libbsp/m68k/mvme136/shmsupp/lock.c')
-rw-r--r-- | c/src/lib/libbsp/m68k/mvme136/shmsupp/lock.c | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/c/src/lib/libbsp/m68k/mvme136/shmsupp/lock.c b/c/src/lib/libbsp/m68k/mvme136/shmsupp/lock.c deleted file mode 100644 index 129de01fd0..0000000000 --- a/c/src/lib/libbsp/m68k/mvme136/shmsupp/lock.c +++ /dev/null @@ -1,71 +0,0 @@ -/* 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. - * On-Line Applications Research Corporation (OAR). - * - * 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 <rtems.h> -#include <bsp.h> -#include <shm_driver.h> - -/* - * Shm_Initialize_lock - * - * Initialize the lock for the specified locked queue. - */ - -void Shm_Initialize_lock( - Shm_Locked_queue_Control *lq_cb -) -{ - 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. - */ - -void Shm_Lock( - Shm_Locked_queue_Control *lq_cb -) -{ - uint32_t isr_level; - uint32_t *lockptr = (uint32_t*)&lq_cb->lock; - - rtems_interrupt_disable( isr_level ); - Shm_isrstat = isr_level; - __asm__ volatile( "lockit:" : : ); - __asm__ volatile( "tas %0@" : "=a" (lockptr) : "0" (lockptr) ); - __asm__ volatile( "bne lockit" : : ); -/* should delay */ -} - -/* - * Shm_Unlock - * - * Unlock the lock for the specified locked queue. - */ - -void Shm_Unlock( - Shm_Locked_queue_Control *lq_cb -) -{ - uint32_t isr_level; - - lq_cb->lock = SHM_UNLOCK_VALUE; - isr_level = Shm_isrstat; - rtems_interrupt_enable( isr_level ); -} |