1 /******************************************************************************
3 * Name: hwxfsleep.c - ACPI Hardware Sleep/Wake External Interfaces
5 *****************************************************************************/
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44 #include <contrib/dev/acpica/include/acpi.h>
45 #include <contrib/dev/acpica/include/accommon.h>
47 #define _COMPONENT ACPI_HARDWARE
48 ACPI_MODULE_NAME ("hwxfsleep")
50 /* Local prototypes */
59 * Dispatch table used to efficiently branch to the various sleep
62 #define ACPI_SLEEP_FUNCTION_ID 0
63 #define ACPI_WAKE_PREP_FUNCTION_ID 1
64 #define ACPI_WAKE_FUNCTION_ID 2
66 /* Legacy functions are optional, based upon ACPI_REDUCED_HARDWARE */
68 static ACPI_SLEEP_FUNCTIONS AcpiSleepDispatch[] =
70 {ACPI_HW_OPTIONAL_FUNCTION (AcpiHwLegacySleep), AcpiHwExtendedSleep},
71 {ACPI_HW_OPTIONAL_FUNCTION (AcpiHwLegacyWakePrep), AcpiHwExtendedWakePrep},
72 {ACPI_HW_OPTIONAL_FUNCTION (AcpiHwLegacyWake), AcpiHwExtendedWake}
77 * These functions are removed for the ACPI_REDUCED_HARDWARE case:
78 * AcpiSetFirmwareWakingVector
79 * AcpiSetFirmwareWakingVector64
80 * AcpiEnterSleepStateS4bios
83 #if (!ACPI_REDUCED_HARDWARE)
84 /*******************************************************************************
86 * FUNCTION: AcpiSetFirmwareWakingVector
88 * PARAMETERS: PhysicalAddress - 32-bit physical address of ACPI real mode
93 * DESCRIPTION: Sets the 32-bit FirmwareWakingVector field of the FACS
95 ******************************************************************************/
98 AcpiSetFirmwareWakingVector (
99 UINT32 PhysicalAddress)
101 ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector);
105 * According to the ACPI specification 2.0c and later, the 64-bit
106 * waking vector should be cleared and the 32-bit waking vector should
107 * be used, unless we want the wake-up code to be called by the BIOS in
108 * Protected Mode. Some systems (for example HP dv5-1004nr) are known
109 * to fail to resume if the 64-bit vector is used.
112 /* Set the 32-bit vector */
114 AcpiGbl_FACS->FirmwareWakingVector = PhysicalAddress;
116 /* Clear the 64-bit vector if it exists */
118 if ((AcpiGbl_FACS->Length > 32) && (AcpiGbl_FACS->Version >= 1))
120 AcpiGbl_FACS->XFirmwareWakingVector = 0;
123 return_ACPI_STATUS (AE_OK);
126 ACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector)
129 #if ACPI_MACHINE_WIDTH == 64
130 /*******************************************************************************
132 * FUNCTION: AcpiSetFirmwareWakingVector64
134 * PARAMETERS: PhysicalAddress - 64-bit physical address of ACPI protected
139 * DESCRIPTION: Sets the 64-bit X_FirmwareWakingVector field of the FACS, if
140 * it exists in the table. This function is intended for use with
141 * 64-bit host operating systems.
143 ******************************************************************************/
146 AcpiSetFirmwareWakingVector64 (
147 UINT64 PhysicalAddress)
149 ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector64);
152 /* Determine if the 64-bit vector actually exists */
154 if ((AcpiGbl_FACS->Length <= 32) || (AcpiGbl_FACS->Version < 1))
156 return_ACPI_STATUS (AE_NOT_EXIST);
159 /* Clear 32-bit vector, set the 64-bit X_ vector */
161 AcpiGbl_FACS->FirmwareWakingVector = 0;
162 AcpiGbl_FACS->XFirmwareWakingVector = PhysicalAddress;
163 return_ACPI_STATUS (AE_OK);
166 ACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector64)
170 /*******************************************************************************
172 * FUNCTION: AcpiEnterSleepStateS4bios
178 * DESCRIPTION: Perform a S4 bios request.
179 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
181 ******************************************************************************/
184 AcpiEnterSleepStateS4bios (
191 ACPI_FUNCTION_TRACE (AcpiEnterSleepStateS4bios);
194 /* Clear the wake status bit (PM1) */
196 Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
197 if (ACPI_FAILURE (Status))
199 return_ACPI_STATUS (Status);
202 Status = AcpiHwClearAcpiStatus ();
203 if (ACPI_FAILURE (Status))
205 return_ACPI_STATUS (Status);
209 * 1) Disable/Clear all GPEs
210 * 2) Enable all wakeup GPEs
212 Status = AcpiHwDisableAllGpes ();
213 if (ACPI_FAILURE (Status))
215 return_ACPI_STATUS (Status);
217 AcpiGbl_SystemAwakeAndRunning = FALSE;
219 Status = AcpiHwEnableAllWakeupGpes ();
220 if (ACPI_FAILURE (Status))
222 return_ACPI_STATUS (Status);
225 ACPI_FLUSH_CPU_CACHE ();
227 Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
228 (UINT32) AcpiGbl_FADT.S4BiosRequest, 8);
232 Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue);
233 if (ACPI_FAILURE (Status))
235 return_ACPI_STATUS (Status);
239 return_ACPI_STATUS (AE_OK);
242 ACPI_EXPORT_SYMBOL (AcpiEnterSleepStateS4bios)
244 #endif /* !ACPI_REDUCED_HARDWARE */
247 /*******************************************************************************
249 * FUNCTION: AcpiHwSleepDispatch
251 * PARAMETERS: SleepState - Which sleep state to enter/exit
252 * FunctionId - Sleep, WakePrep, or Wake
254 * RETURN: Status from the invoked sleep handling function.
256 * DESCRIPTION: Dispatch a sleep/wake request to the appropriate handling
259 ******************************************************************************/
262 AcpiHwSleepDispatch (
268 ACPI_SLEEP_FUNCTIONS *SleepFunctions = &AcpiSleepDispatch[FunctionId];
271 #if (!ACPI_REDUCED_HARDWARE)
274 * If the Hardware Reduced flag is set (from the FADT), we must
275 * use the extended sleep registers
277 if (AcpiGbl_ReducedHardware ||
278 AcpiGbl_FADT.SleepControl.Address)
280 Status = SleepFunctions->ExtendedFunction (SleepState, Flags);
286 Status = SleepFunctions->LegacyFunction (SleepState, Flags);
293 * For the case where reduced-hardware-only code is being generated,
294 * we know that only the extended sleep registers are available
296 Status = SleepFunctions->ExtendedFunction (SleepState, Flags);
299 #endif /* !ACPI_REDUCED_HARDWARE */
303 /*******************************************************************************
305 * FUNCTION: AcpiEnterSleepStatePrep
307 * PARAMETERS: SleepState - Which sleep state to enter
311 * DESCRIPTION: Prepare to enter a system sleep state.
312 * This function must execute with interrupts enabled.
313 * We break sleeping into 2 stages so that OSPM can handle
314 * various OS-specific tasks between the two steps.
316 ******************************************************************************/
319 AcpiEnterSleepStatePrep (
323 ACPI_OBJECT_LIST ArgList;
328 ACPI_FUNCTION_TRACE (AcpiEnterSleepStatePrep);
331 Status = AcpiGetSleepTypeData (SleepState,
332 &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
333 if (ACPI_FAILURE (Status))
335 return_ACPI_STATUS (Status);
338 /* Execute the _PTS method (Prepare To Sleep) */
341 ArgList.Pointer = &Arg;
342 Arg.Type = ACPI_TYPE_INTEGER;
343 Arg.Integer.Value = SleepState;
345 Status = AcpiEvaluateObject (NULL, METHOD_PATHNAME__PTS, &ArgList, NULL);
346 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
348 return_ACPI_STATUS (Status);
351 /* Setup the argument to the _SST method (System STatus) */
356 SstValue = ACPI_SST_WORKING;
362 SstValue = ACPI_SST_SLEEPING;
366 SstValue = ACPI_SST_SLEEP_CONTEXT;
370 SstValue = ACPI_SST_INDICATOR_OFF; /* Default is off */
375 * Set the system indicators to show the desired sleep state.
376 * _SST is an optional method (return no error if not found)
378 AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, SstValue);
379 return_ACPI_STATUS (AE_OK);
382 ACPI_EXPORT_SYMBOL (AcpiEnterSleepStatePrep)
385 /*******************************************************************************
387 * FUNCTION: AcpiEnterSleepState
389 * PARAMETERS: SleepState - Which sleep state to enter
390 * Flags - ACPI_EXECUTE_GTS to run optional method
394 * DESCRIPTION: Enter a system sleep state
395 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
397 ******************************************************************************/
400 AcpiEnterSleepState (
407 ACPI_FUNCTION_TRACE (AcpiEnterSleepState);
410 if ((AcpiGbl_SleepTypeA > ACPI_SLEEP_TYPE_MAX) ||
411 (AcpiGbl_SleepTypeB > ACPI_SLEEP_TYPE_MAX))
413 ACPI_ERROR ((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X",
414 AcpiGbl_SleepTypeA, AcpiGbl_SleepTypeB));
415 return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
418 Status = AcpiHwSleepDispatch (SleepState, Flags, ACPI_SLEEP_FUNCTION_ID);
419 return_ACPI_STATUS (Status);
422 ACPI_EXPORT_SYMBOL (AcpiEnterSleepState)
425 /*******************************************************************************
427 * FUNCTION: AcpiLeaveSleepStatePrep
429 * PARAMETERS: SleepState - Which sleep state we are exiting
430 * Flags - ACPI_EXECUTE_BFS to run optional method
434 * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
435 * sleep. Called with interrupts DISABLED.
436 * We break wake/resume into 2 stages so that OSPM can handle
437 * various OS-specific tasks between the two steps.
439 ******************************************************************************/
442 AcpiLeaveSleepStatePrep (
449 ACPI_FUNCTION_TRACE (AcpiLeaveSleepStatePrep);
452 Status = AcpiHwSleepDispatch (SleepState, Flags, ACPI_WAKE_PREP_FUNCTION_ID);
453 return_ACPI_STATUS (Status);
456 ACPI_EXPORT_SYMBOL (AcpiLeaveSleepStatePrep)
459 /*******************************************************************************
461 * FUNCTION: AcpiLeaveSleepState
463 * PARAMETERS: SleepState - Which sleep state we are exiting
467 * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
468 * Called with interrupts ENABLED.
470 ******************************************************************************/
473 AcpiLeaveSleepState (
479 ACPI_FUNCTION_TRACE (AcpiLeaveSleepState);
482 Status = AcpiHwSleepDispatch (SleepState, 0, ACPI_WAKE_FUNCTION_ID);
483 return_ACPI_STATUS (Status);
486 ACPI_EXPORT_SYMBOL (AcpiLeaveSleepState)