static u32 acpi_ev_global_lock_handler(void *context)
{
u8 acquired = FALSE;
/*
* Attempt to get the lock.
*
* If we don't get it now, it will be marked pending and we will
* take another interrupt when it becomes free.
*/
ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_FACS, acquired);
if (acquired) {
/* Got the lock, now wake all threads waiting for it */
acpi_gbl_global_lock_acquired = TRUE;
/* Send a unit to the semaphore */
if (ACPI_FAILURE
(acpi_os_signal_semaphore
(acpi_gbl_global_lock_semaphore, 1))) {
ACPI_ERROR((AE_INFO,
"Could not signal Global Lock semaphore"));
}
}
return (ACPI_INTERRUPT_HANDLED);
}
static u32
acpi_ev_global_lock_handler (
void *context)
{
u8 acquired = FALSE;
acpi_status status;
/*
* Attempt to get the lock
* If we don't get it now, it will be marked pending and we will
* take another interrupt when it becomes free.
*/
ACPI_ACQUIRE_GLOBAL_LOCK (acpi_gbl_common_fACS.global_lock, acquired);
if (acquired) {
/* Got the lock, now wake all threads waiting for it */
acpi_gbl_global_lock_acquired = TRUE;
/* Run the Global Lock thread which will signal all waiting threads */
status = acpi_os_queue_for_execution (OSD_PRIORITY_HIGH,
acpi_ev_global_lock_thread, context);
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("Could not queue Global Lock thread, %s\n",
acpi_format_exception (status)));
return (ACPI_INTERRUPT_NOT_HANDLED);
}
}
return (ACPI_INTERRUPT_HANDLED);
}
static u32 acpi_ev_global_lock_handler(void *context)
{
u8 acquired = FALSE;
acpi_status status;
/*
* Attempt to get the lock
* If we don't get it now, it will be marked pending and we will
* take another interrupt when it becomes free.
*/
ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_common_fACS.global_lock, acquired);
if (acquired) {
/* Got the lock, now wake all threads waiting for it */
acpi_gbl_global_lock_acquired = TRUE;
/* Run the Global Lock thread which will signal all waiting threads */
status =
acpi_os_execute(OSL_GLOBAL_LOCK_HANDLER,
acpi_ev_global_lock_thread, context);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Could not queue Global Lock thread"));
return (ACPI_INTERRUPT_NOT_HANDLED);
}
}
return (ACPI_INTERRUPT_HANDLED);
}
static UINT32
AcpiEvGlobalLockHandler (
void *Context)
{
BOOLEAN Acquired = FALSE;
ACPI_STATUS Status;
/*
* Attempt to get the lock.
*
* If we don't get it now, it will be marked pending and we will
* take another interrupt when it becomes free.
*/
ACPI_ACQUIRE_GLOBAL_LOCK (Facs, Acquired);
if (Acquired)
{
/* Got the lock, now wake the thread waiting for it */
AcpiGbl_GlobalLockAcquired = TRUE;
/* Send a unit to the semaphore */
Status = AcpiOsSignalSemaphore (AcpiGbl_GlobalLockSemaphore, 1);
if (ACPI_FAILURE (Status))
{
ACPI_ERROR ((AE_INFO, "Could not signal Global Lock semaphore"));
}
}
return (ACPI_INTERRUPT_HANDLED);
}
acpi_status acpi_ev_acquire_global_lock(u16 timeout)
{
acpi_cpu_flags flags;
acpi_status status;
u8 acquired = FALSE;
ACPI_FUNCTION_TRACE(ev_acquire_global_lock);
status =
acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex->mutex.
os_mutex, timeout);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
acpi_gbl_global_lock_handle++;
if (acpi_gbl_global_lock_handle == 0) {
acpi_gbl_global_lock_handle = 1;
}
if (!acpi_gbl_global_lock_present) {
acpi_gbl_global_lock_acquired = TRUE;
return_ACPI_STATUS(AE_OK);
}
flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
do {
ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_FACS, acquired);
if (acquired) {
acpi_gbl_global_lock_acquired = TRUE;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Acquired hardware Global Lock\n"));
break;
}
acpi_gbl_global_lock_pending = TRUE;
acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Waiting for hardware Global Lock\n"));
status =
acpi_ex_system_wait_semaphore
(acpi_gbl_global_lock_semaphore, ACPI_WAIT_FOREVER);
flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
} while (ACPI_SUCCESS(status));
acpi_gbl_global_lock_pending = FALSE;
acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
return_ACPI_STATUS(status);
}
acpi_status
acpi_ev_acquire_global_lock (
u16 timeout)
{
acpi_status status = AE_OK;
u8 acquired = FALSE;
ACPI_FUNCTION_TRACE ("ev_acquire_global_lock");
#ifndef ACPI_APPLICATION
/* Make sure that we actually have a global lock */
if (!acpi_gbl_global_lock_present) {
return_ACPI_STATUS (AE_NO_GLOBAL_LOCK);
}
#endif
/* One more thread wants the global lock */
acpi_gbl_global_lock_thread_count++;
/*
* If we (OS side vs. BIOS side) have the hardware lock already,
* we are done
*/
if (acpi_gbl_global_lock_acquired) {
return_ACPI_STATUS (AE_OK);
}
/* We must acquire the actual hardware lock */
ACPI_ACQUIRE_GLOBAL_LOCK (acpi_gbl_common_fACS.global_lock, acquired);
if (acquired) {
/* We got the lock */
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Acquired the HW Global Lock\n"));
acpi_gbl_global_lock_acquired = TRUE;
return_ACPI_STATUS (AE_OK);
}
/*
* Did not get the lock. The pending bit was set above, and we must now
* wait until we get the global lock released interrupt.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Waiting for the HW Global Lock\n"));
/*
* Acquire the global lock semaphore first.
* Since this wait will block, we must release the interpreter
*/
status = acpi_ex_system_wait_semaphore (acpi_gbl_global_lock_semaphore,
timeout);
return_ACPI_STATUS (status);
}
ACPI_STATUS
AcpiEvAcquireGlobalLock (
UINT16 Timeout)
{
ACPI_CPU_FLAGS Flags;
ACPI_STATUS Status;
BOOLEAN Acquired = FALSE;
ACPI_FUNCTION_TRACE (EvAcquireGlobalLock);
/*
* Only one thread can acquire the GL at a time, the GlobalLockMutex
* enforces this. This interface releases the interpreter if we must wait.
*/
Status = AcpiExSystemWaitMutex (AcpiGbl_GlobalLockMutex->Mutex.OsMutex,
Timeout);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Update the global lock handle and check for wraparound. The handle is
* only used for the external global lock interfaces, but it is updated
* here to properly handle the case where a single thread may acquire the
* lock via both the AML and the AcpiAcquireGlobalLock interfaces. The
* handle is therefore updated on the first acquire from a given thread
* regardless of where the acquisition request originated.
*/
AcpiGbl_GlobalLockHandle++;
if (AcpiGbl_GlobalLockHandle == 0)
{
AcpiGbl_GlobalLockHandle = 1;
}
/*
* Make sure that a global lock actually exists. If not, just
* treat the lock as a standard mutex.
*/
if (!AcpiGbl_GlobalLockPresent)
{
AcpiGbl_GlobalLockAcquired = TRUE;
return_ACPI_STATUS (AE_OK);
}
Flags = AcpiOsAcquireLock (AcpiGbl_GlobalLockPendingLock);
do
{
/* Attempt to acquire the actual hardware lock */
ACPI_ACQUIRE_GLOBAL_LOCK (AcpiGbl_FACS, Acquired);
if (Acquired)
{
AcpiGbl_GlobalLockAcquired = TRUE;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Acquired hardware Global Lock\n"));
break;
}
/*
* Did not get the lock. The pending bit was set above, and
* we must now wait until we receive the global lock
* released interrupt.
*/
AcpiGbl_GlobalLockPending = TRUE;
AcpiOsReleaseLock (AcpiGbl_GlobalLockPendingLock, Flags);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Waiting for hardware Global Lock\n"));
/*
* Wait for handshake with the global lock interrupt handler.
* This interface releases the interpreter if we must wait.
*/
Status = AcpiExSystemWaitSemaphore (AcpiGbl_GlobalLockSemaphore,
ACPI_WAIT_FOREVER);
Flags = AcpiOsAcquireLock (AcpiGbl_GlobalLockPendingLock);
} while (ACPI_SUCCESS (Status));
AcpiGbl_GlobalLockPending = FALSE;
AcpiOsReleaseLock (AcpiGbl_GlobalLockPendingLock, Flags);
return_ACPI_STATUS (Status);
}
acpi_status acpi_ev_acquire_global_lock(u16 timeout)
{
acpi_cpu_flags flags;
acpi_status status;
u8 acquired = FALSE;
ACPI_FUNCTION_TRACE(ev_acquire_global_lock);
/*
* Only one thread can acquire the GL at a time, the global_lock_mutex
* enforces this. This interface releases the interpreter if we must wait.
*/
status =
acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex->mutex.
os_mutex, timeout);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* Update the global lock handle and check for wraparound. The handle is
* only used for the external global lock interfaces, but it is updated
* here to properly handle the case where a single thread may acquire the
* lock via both the AML and the acpi_acquire_global_lock interfaces. The
* handle is therefore updated on the first acquire from a given thread
* regardless of where the acquisition request originated.
*/
acpi_gbl_global_lock_handle++;
if (acpi_gbl_global_lock_handle == 0) {
acpi_gbl_global_lock_handle = 1;
}
/*
* Make sure that a global lock actually exists. If not, just
* treat the lock as a standard mutex.
*/
if (!acpi_gbl_global_lock_present) {
acpi_gbl_global_lock_acquired = TRUE;
return_ACPI_STATUS(AE_OK);
}
flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
do {
/* Attempt to acquire the actual hardware lock */
ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_FACS, acquired);
if (acquired) {
acpi_gbl_global_lock_acquired = TRUE;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Acquired hardware Global Lock\n"));
break;
}
/*
* Did not get the lock. The pending bit was set above, and
* we must now wait until we receive the global lock
* released interrupt.
*/
acpi_gbl_global_lock_pending = TRUE;
acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Waiting for hardware Global Lock\n"));
/*
* Wait for handshake with the global lock interrupt handler.
* This interface releases the interpreter if we must wait.
*/
status =
acpi_ex_system_wait_semaphore
(acpi_gbl_global_lock_semaphore, ACPI_WAIT_FOREVER);
flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
} while (ACPI_SUCCESS(status));
acpi_gbl_global_lock_pending = FALSE;
acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
return_ACPI_STATUS(status);
}
acpi_status acpi_ev_acquire_global_lock(u16 timeout)
{
acpi_status status = AE_OK;
u8 acquired = FALSE;
ACPI_FUNCTION_TRACE(ev_acquire_global_lock);
/*
* Only one thread can acquire the GL at a time, the global_lock_mutex
* enforces this. This interface releases the interpreter if we must wait.
*/
status = acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex, 0);
if (status == AE_TIME) {
if (acpi_ev_global_lock_thread_id == acpi_os_get_thread_id()) {
acpi_ev_global_lock_acquired++;
return AE_OK;
}
}
if (ACPI_FAILURE(status)) {
status = acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex, timeout);
}
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
acpi_ev_global_lock_thread_id = acpi_os_get_thread_id();
acpi_ev_global_lock_acquired++;
/*
* Make sure that a global lock actually exists. If not, just treat
* the lock as a standard mutex.
*/
if (!acpi_gbl_global_lock_present) {
acpi_gbl_global_lock_acquired = TRUE;
return_ACPI_STATUS(AE_OK);
}
/* Attempt to acquire the actual hardware lock */
ACPI_ACQUIRE_GLOBAL_LOCK(facs, acquired);
if (acquired) {
/* We got the lock */
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Acquired hardware Global Lock\n"));
acpi_gbl_global_lock_acquired = TRUE;
return_ACPI_STATUS(AE_OK);
}
/*
* Did not get the lock. The pending bit was set above, and we must now
* wait until we get the global lock released interrupt.
*/
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Waiting for hardware Global Lock\n"));
/*
* Wait for handshake with the global lock interrupt handler.
* This interface releases the interpreter if we must wait.
*/
status = acpi_ex_system_wait_semaphore(acpi_gbl_global_lock_semaphore,
ACPI_WAIT_FOREVER);
return_ACPI_STATUS(status);
}
