ReactOS 0.4.15-dev-7712-gbbbcd8e
evglock.c File Reference
#include "acpi.h"
#include "accommon.h"
#include "acevents.h"
#include "acinterp.h"
Include dependency graph for evglock.c:

Go to the source code of this file.

Macros

#define _COMPONENT   ACPI_EVENTS
 

Functions

static UINT32 AcpiEvGlobalLockHandler (void *Context)
 
ACPI_STATUS AcpiEvInitGlobalLockHandler (void)
 
ACPI_STATUS AcpiEvRemoveGlobalLockHandler (void)
 
ACPI_STATUS AcpiEvAcquireGlobalLock (UINT16 Timeout)
 
ACPI_STATUS AcpiEvReleaseGlobalLock (void)
 

Macro Definition Documentation

◆ _COMPONENT

#define _COMPONENT   ACPI_EVENTS

Definition at line 49 of file evglock.c.

Function Documentation

◆ AcpiEvAcquireGlobalLock()

ACPI_STATUS AcpiEvAcquireGlobalLock ( UINT16  Timeout)

Definition at line 230 of file evglock.c.

232{
235 BOOLEAN Acquired = FALSE;
236
237
238 ACPI_FUNCTION_TRACE (EvAcquireGlobalLock);
239
240
241 /*
242 * Only one thread can acquire the GL at a time, the GlobalLockMutex
243 * enforces this. This interface releases the interpreter if we must wait.
244 */
245 Status = AcpiExSystemWaitMutex (AcpiGbl_GlobalLockMutex->Mutex.OsMutex,
246 Timeout);
247 if (ACPI_FAILURE (Status))
248 {
250 }
251
252 /*
253 * Update the global lock handle and check for wraparound. The handle is
254 * only used for the external global lock interfaces, but it is updated
255 * here to properly handle the case where a single thread may acquire the
256 * lock via both the AML and the AcpiAcquireGlobalLock interfaces. The
257 * handle is therefore updated on the first acquire from a given thread
258 * regardless of where the acquisition request originated.
259 */
260 AcpiGbl_GlobalLockHandle++;
261 if (AcpiGbl_GlobalLockHandle == 0)
262 {
263 AcpiGbl_GlobalLockHandle = 1;
264 }
265
266 /*
267 * Make sure that a global lock actually exists. If not, just
268 * treat the lock as a standard mutex.
269 */
270 if (!AcpiGbl_GlobalLockPresent)
271 {
272 AcpiGbl_GlobalLockAcquired = TRUE;
274 }
275
276 Flags = AcpiOsAcquireLock (AcpiGbl_GlobalLockPendingLock);
277
278 do
279 {
280 /* Attempt to acquire the actual hardware lock */
281
282 ACPI_ACQUIRE_GLOBAL_LOCK (AcpiGbl_FACS, Acquired);
283 if (Acquired)
284 {
285 AcpiGbl_GlobalLockAcquired = TRUE;
287 "Acquired hardware Global Lock\n"));
288 break;
289 }
290
291 /*
292 * Did not get the lock. The pending bit was set above, and
293 * we must now wait until we receive the global lock
294 * released interrupt.
295 */
296 AcpiGbl_GlobalLockPending = TRUE;
297 AcpiOsReleaseLock (AcpiGbl_GlobalLockPendingLock, Flags);
298
300 "Waiting for hardware Global Lock\n"));
301
302 /*
303 * Wait for handshake with the global lock interrupt handler.
304 * This interface releases the interpreter if we must wait.
305 */
307 AcpiGbl_GlobalLockSemaphore, ACPI_WAIT_FOREVER);
308
309 Flags = AcpiOsAcquireLock (AcpiGbl_GlobalLockPendingLock);
310
311 } while (ACPI_SUCCESS (Status));
312
313 AcpiGbl_GlobalLockPending = FALSE;
314 AcpiOsReleaseLock (AcpiGbl_GlobalLockPendingLock, Flags);
315
317}
unsigned char BOOLEAN
#define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq)
Definition: accygwin.h:82
#define ACPI_FAILURE(a)
Definition: acexcep.h:95
#define ACPI_SUCCESS(a)
Definition: acexcep.h:94
#define AE_OK
Definition: acexcep.h:97
#define ACPI_DEBUG_PRINT(pl)
Definition: acoutput.h:475
#define ACPI_DB_EXEC
Definition: acoutput.h:165
#define return_ACPI_STATUS(s)
Definition: acoutput.h:496
#define ACPI_FUNCTION_TRACE(a)
Definition: acoutput.h:480
void AcpiOsReleaseLock(ACPI_SPINLOCK Handle, ACPI_CPU_FLAGS Flags)
Definition: osl.c:516
ACPI_CPU_FLAGS AcpiOsAcquireLock(ACPI_SPINLOCK Handle)
Definition: osl.c:498
#define ACPI_CPU_FLAGS
Definition: actypes.h:252
UINT32 ACPI_STATUS
Definition: actypes.h:460
#define ACPI_WAIT_FOREVER
Definition: actypes.h:501
#define TRUE
Definition: types.h:120
#define FALSE
Definition: types.h:117
ACPI_STATUS AcpiExSystemWaitMutex(ACPI_MUTEX Mutex, UINT16 Timeout)
Definition: exsystem.c:120
ACPI_STATUS AcpiExSystemWaitSemaphore(ACPI_SEMAPHORE Semaphore, UINT16 Timeout)
Definition: exsystem.c:68
Status
Definition: gdiplustypes.h:25
static ULONG Timeout
Definition: ping.c:61
_Must_inspect_result_ _In_ ULONG Flags
Definition: wsk.h:170

Referenced by AcpiExAcquireMutexObject().

◆ AcpiEvGlobalLockHandler()

static UINT32 AcpiEvGlobalLockHandler ( void Context)
static

Definition at line 168 of file evglock.c.

170{
173
174
175 Flags = AcpiOsAcquireLock (AcpiGbl_GlobalLockPendingLock);
176
177 /*
178 * If a request for the global lock is not actually pending,
179 * we are done. This handles "spurious" global lock interrupts
180 * which are possible (and have been seen) with bad BIOSs.
181 */
182 if (!AcpiGbl_GlobalLockPending)
183 {
184 goto CleanupAndExit;
185 }
186
187 /*
188 * Send a unit to the global lock semaphore. The actual acquisition
189 * of the global lock will be performed by the waiting thread.
190 */
191 Status = AcpiOsSignalSemaphore (AcpiGbl_GlobalLockSemaphore, 1);
192 if (ACPI_FAILURE (Status))
193 {
194 ACPI_ERROR ((AE_INFO, "Could not signal Global Lock semaphore"));
195 }
196
197 AcpiGbl_GlobalLockPending = FALSE;
198
199
200CleanupAndExit:
201
202 AcpiOsReleaseLock (AcpiGbl_GlobalLockPendingLock, Flags);
203 return (ACPI_INTERRUPT_HANDLED);
204}
#define ACPI_ERROR(plist)
Definition: acoutput.h:240
#define AE_INFO
Definition: acoutput.h:230
ACPI_STATUS AcpiOsSignalSemaphore(ACPI_SEMAPHORE Handle, UINT32 Units)
Definition: osl.c:439
#define ACPI_INTERRUPT_HANDLED
Definition: actypes.h:1264

Referenced by AcpiEvInitGlobalLockHandler(), and AcpiEvRemoveGlobalLockHandler().

◆ AcpiEvInitGlobalLockHandler()

ACPI_STATUS AcpiEvInitGlobalLockHandler ( void  )

Definition at line 74 of file evglock.c.

76{
78
79
80 ACPI_FUNCTION_TRACE (EvInitGlobalLockHandler);
81
82
83 /* If Hardware Reduced flag is set, there is no global lock */
84
85 if (AcpiGbl_ReducedHardware)
86 {
88 }
89
90 /* Attempt installation of the global lock handler */
91
94
95 /*
96 * If the global lock does not exist on this platform, the attempt to
97 * enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick).
98 * Map to AE_OK, but mark global lock as not present. Any attempt to
99 * actually use the global lock will be flagged with an error.
100 */
101 AcpiGbl_GlobalLockPresent = FALSE;
103 {
105 "No response from Global Lock hardware, disabling lock"));
106
108 }
109
110 Status = AcpiOsCreateLock (&AcpiGbl_GlobalLockPendingLock);
111 if (ACPI_FAILURE (Status))
112 {
114 }
115
116 AcpiGbl_GlobalLockPending = FALSE;
117 AcpiGbl_GlobalLockPresent = TRUE;
119}
#define AE_NO_HARDWARE_RESPONSE
Definition: acexcep.h:130
ACPI_STATUS AcpiOsCreateLock(ACPI_SPINLOCK *OutHandle)
Definition: osl.c:463
#define ACPI_EVENT_GLOBAL
Definition: actypes.h:764
#define NULL
Definition: types.h:112
static UINT32 AcpiEvGlobalLockHandler(void *Context)
Definition: evglock.c:168
ACPI_STATUS AcpiInstallFixedEventHandler(UINT32 Event, ACPI_EVENT_HANDLER Handler, void *Context)
Definition: evxface.c:707

Referenced by AcpiEvInstallXruptHandlers().

◆ AcpiEvReleaseGlobalLock()

ACPI_STATUS AcpiEvReleaseGlobalLock ( void  )

Definition at line 333 of file evglock.c.

335{
338
339
340 ACPI_FUNCTION_TRACE (EvReleaseGlobalLock);
341
342
343 /* Lock must be already acquired */
344
345 if (!AcpiGbl_GlobalLockAcquired)
346 {
348 "Cannot release the ACPI Global Lock, it has not been acquired"));
350 }
351
352 if (AcpiGbl_GlobalLockPresent)
353 {
354 /* Allow any thread to release the lock */
355
356 ACPI_RELEASE_GLOBAL_LOCK (AcpiGbl_FACS, Pending);
357
358 /*
359 * If the pending bit was set, we must write GBL_RLS to the control
360 * register
361 */
362 if (Pending)
363 {
366 }
367
368 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Released hardware Global Lock\n"));
369 }
370
371 AcpiGbl_GlobalLockAcquired = FALSE;
372
373 /* Release the local GL mutex */
374
375 AcpiOsReleaseMutex (AcpiGbl_GlobalLockMutex->Mutex.OsMutex);
377}
#define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Pending)
Definition: accygwin.h:83
#define AE_NOT_ACQUIRED
Definition: acexcep.h:128
#define ACPI_WARNING(plist)
Definition: acoutput.h:238
#define AcpiOsReleaseMutex(Handle)
Definition: actypes.h:277
#define ACPI_ENABLE_EVENT
Definition: actypes.h:943
#define ACPI_BITREG_GLOBAL_LOCK_RELEASE
Definition: actypes.h:925
@ Pending
Definition: fs_rec.h:186
ACPI_STATUS AcpiWriteBitRegister(UINT32 RegisterId, UINT32 Value)
Definition: hwxface.c:282

Referenced by AcpiExReleaseAllMutexes(), and AcpiExReleaseMutexObject().

◆ AcpiEvRemoveGlobalLockHandler()

ACPI_STATUS AcpiEvRemoveGlobalLockHandler ( void  )

Definition at line 135 of file evglock.c.

137{
139
140
141 ACPI_FUNCTION_TRACE (EvRemoveGlobalLockHandler);
142
143
144 AcpiGbl_GlobalLockPresent = FALSE;
147
148 AcpiOsDeleteLock (AcpiGbl_GlobalLockPendingLock);
150}
void AcpiOsDeleteLock(ACPI_SPINLOCK Handle)
Definition: osl.c:485
ACPI_STATUS AcpiRemoveFixedEventHandler(UINT32 Event, ACPI_EVENT_HANDLER Handler)
Definition: evxface.c:786

Referenced by AcpiEvTerminate().