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-rw-r--r--cpukit/score/src/smplock.c285
1 files changed, 0 insertions, 285 deletions
diff --git a/cpukit/score/src/smplock.c b/cpukit/score/src/smplock.c
deleted file mode 100644
index 89f8a866dd..0000000000
--- a/cpukit/score/src/smplock.c
+++ /dev/null
@@ -1,285 +0,0 @@
-/**
- * @file
- *
- * @brief SMP Locking Support
- * @ingroup RTEMS
- */
-
-/*
- * COPYRIGHT (c) 1989-2011.
- * 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.com/license/LICENSE.
- */
-
-#if HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <rtems/system.h>
-#include <rtems/score/smplock.h>
-#include <rtems/score/smp.h>
-#include <rtems/score/isr.h>
-
-/*
- * Some debug stuff that is being left in, but disabled. This will keep
- * a log of lock/unlock sequences that can be printed out when the
- * lockcount appears to have gotten off track.
- */
-/* #define SMPLOCK_DEBUG */
-#if defined (SMPLOCK_DEBUG)
- #include <rtems/score/thread.h>
- #include <rtems/bspIo.h>
- #include <rtems/score/percpu.h>
- #if (0)
- #define ENABLE_ONESHOT_DEBUG_LOGGING
- #else
- #define ENABLE_LOOPED_DEBUG_LOGGING
- #endif
- #define ENABLE_DEBUG_LOGGING
-#endif
-
-/*
- * Prototypes and structures used in the debug lock/unlock error log.
- */
-#if defined(ENABLE_DEBUG_LOGGING)
- typedef struct {
- char action;
- char lock;
- char cpu;
- char count;
- uint32_t nest_level;
- void *ret1;
- void *ret2;
- void *ret3;
- void *ret4;
- } debug_spinlog_t;
-
- extern void start(void);
- extern void _fini(void);
-
- #define DEBUG_SPINLOG_MAX 1024
- debug_spinlog_t DEBUG_SPINLOG[DEBUG_SPINLOG_MAX];
- int DEBUG_SPINLOG_INDEX = 0;
-
- static void debug_logit(
- char act,
- SMP_lock_spinlock_nested_Control *lock
- );
- static void debug_dump_log(void);
-#else
- #define debug_logit( _act, _lock )
- #define debug_dump_log()
-#endif
-
-void _SMP_lock_spinlock_simple_Initialize(
- SMP_lock_spinlock_simple_Control *lock
-)
-{
- *lock = 0;
-}
-
-ISR_Level _SMP_lock_spinlock_simple_Obtain(
- SMP_lock_spinlock_simple_Control *lock
-)
-{
- ISR_Level level = 0;
- uint32_t value = 1;
- uint32_t previous;
-
- /* Note: Disable provides an implicit memory barrier. */
- _ISR_Disable_on_this_core( level );
- do {
- RTEMS_COMPILER_MEMORY_BARRIER();
- SMP_CPU_SWAP( lock, value, previous );
- RTEMS_COMPILER_MEMORY_BARRIER();
- } while (previous == 1);
-
- return level;
-}
-
-void _SMP_lock_spinlock_simple_Release(
- SMP_lock_spinlock_simple_Control *lock,
- ISR_Level level
-)
-{
- *lock = 0;
- _ISR_Enable_on_this_core( level );
-}
-
-void _SMP_lock_spinlock_nested_Initialize(
- SMP_lock_spinlock_nested_Control *lock
-)
-{
- lock->lock = 0;
- lock->count = 0;
- lock->cpu_id = -1;
-}
-
-void _SMP_lock_spinlock_nested_Release(
- SMP_lock_spinlock_nested_Control *lock,
- ISR_Level level
-)
-{
- #if defined (RTEMS_DEBUG) || defined(SMPLOCK_DEBUG)
- if ( lock->count == 0 ) {
- printk(
- "\ncpu %d lock %d Releasing spinlock when count is already "
- "zero (%p from %p,%p)?!?!\n",
- bsp_smp_processor_id(),
- lock->cpu_id,
- lock,
- __builtin_return_address(0),
- __builtin_return_address(1)
- );
- debug_dump_log();
- return;
- }
- #endif
-
- /* assume we actually have it */
- if (lock->count == 1) {
- lock->cpu_id = -1;
- debug_logit( 'U', lock );
- lock->count = 0;
- RTEMS_COMPILER_MEMORY_BARRIER();
- lock->lock = 0;
- } else {
- debug_logit( 'u', lock );
- lock->count--;
- }
-
- _ISR_Enable_on_this_core( level );
-}
-
-ISR_Level _SMP_lock_spinlock_nested_Obtain(
- SMP_lock_spinlock_nested_Control *lock
-)
-{
- ISR_Level level = 0;
- uint32_t value = 1;
- uint32_t previous;
- int cpu_id;
-
- /* Note: Disable provides an implicit memory barrier. */
- _ISR_Disable_on_this_core( level );
-
- cpu_id = bsp_smp_processor_id();
-
- /*
- * Attempt to obtain the lock. If we do not get it immediately, then
- * do a single "monitor" iteration. This should allow the loop to back
- * off the bus a bit and allow the other core to finish sooner.
- */
- while (1) {
- RTEMS_COMPILER_MEMORY_BARRIER();
- SMP_CPU_SWAP( &lock->lock, value, previous );
- RTEMS_COMPILER_MEMORY_BARRIER();
- if ( previous == 0 ) {
- /* was not locked */
- break;
- }
-
- /* Deal with nested calls from one cpu */
- if (cpu_id == lock->cpu_id) {
- lock->count++;
- debug_logit( 'l', lock );
- return level;
- }
- }
-
- lock->cpu_id = cpu_id;
- lock->count = 1;
- debug_logit( 'L', lock );
-
- return level;
-}
-
-/*
- * Debug log for debugging nested lock/unlock problems.
- */
-#if defined(ENABLE_DEBUG_LOGGING)
- static void debug_logit(
- char act,
- SMP_lock_spinlock_nested_Control *lock
- )
- {
- debug_debug_spinlog_t *sp;
- if ( DEBUG_SPINLOG_INDEX == DEBUG_SPINLOG_MAX )
- #if defined (ENABLE_LOOPED_DEBUG_LOGGING)
- DEBUG_SPINLOG_INDEX = 0;
- #else
- return;
- #endif
-
- sp = &DEBUG_SPINLOG[ DEBUG_SPINLOG_INDEX++ ];
- sp->action = act;
-
- #if 0
- if ( lock == &_ISR_SMP_Lock )
- sp->lock = 'I';
- else
- #endif
- if ( lock == &_Thread_Dispatch_disable_level_lock )
- sp->lock = 'D';
- sp->cpu = bsp_smp_processor_id() + '0';
- sp->count = lock->count;
- #if 0
- if ( sp->lock == 'I' ) {
- if ( _Thread_Dispatch_smp_spin_lock.id == 0 )
- printk( "not nested %p from %p %p %p %p\n", sp,
- __builtin_return_address(0), __builtin_return_address(1),
- __builtin_return_address(2), __builtin_return_address(3)
- );
- }
- #endif
- sp->nest_level = _ISR_Nest_level;
- sp->ret1 = 0;
- sp->ret2 = 0;
- sp->ret3 = 0;
- sp->ret4 = 0;
- sp->ret1 = __builtin_return_address(0);
- if ( sp->ret1 >= start && sp->ret1 <= _fini ) {
- sp->ret2 = __builtin_return_address(1);
- if ( sp->ret2 >= start && sp->ret2 <= _fini ) {
- sp->ret3 = __builtin_return_address(2);
- if ( sp->ret3 >= start && sp->ret3 <= _fini ) {
- sp->ret4 = __builtin_return_address(3);
- }
- }
- }
- }
-
- static void debug_dump_log(void)
- {
- debug_debug_spinlog_t *sp;
- int index;
- bool done =false;
-
- #if defined (ENABLE_ONESHOT_DEBUG_LOGGING)
- index = 0;
- #else
- if (DEBUG_SPINLOG_INDEX >= DEBUG_SPINLOG_MAX)
- index = 0;
- else
- index = DEBUG_SPINLOG_INDEX;
- #endif
-
-
- do {
- sp = &DEBUG_SPINLOG[ index ];
- printk("%d) act %c lock %c cpu %c count=%d nest %d (%p, %p, %p, %p)\n",
- index, sp->action, sp->lock, sp->cpu, sp->count, sp->nest_level,
- sp->ret1, sp->ret2, sp->ret3, sp->ret4
- );
-
- index++;
- if (index == DEBUG_SPINLOG_INDEX)
- break;
- if (index >= DEBUG_SPINLOG_MAX)
- index = 0;
- } while (1);
- }
-#endif
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