static void
AeGenericRegisters (
void)
{
ACPI_STATUS Status;
UINT64 Value;
GenericRegister.Address = 0x1234;
GenericRegister.BitWidth = 64;
GenericRegister.BitOffset = 0;
GenericRegister.SpaceId = ACPI_ADR_SPACE_SYSTEM_IO;
Status = AcpiRead (&Value, &GenericRegister);
ACPI_CHECK_OK (AcpiRead, Status);
Status = AcpiWrite (Value, &GenericRegister);
ACPI_CHECK_OK (AcpiWrite, Status);
GenericRegister.Address = 0x12345678;
GenericRegister.BitOffset = 0;
GenericRegister.SpaceId = ACPI_ADR_SPACE_SYSTEM_MEMORY;
Status = AcpiRead (&Value, &GenericRegister);
ACPI_CHECK_OK (AcpiRead, Status);
Status = AcpiWrite (Value, &GenericRegister);
ACPI_CHECK_OK (AcpiWrite, Status);
}
static ACPI_STATUS
AcpiHwEnableWakeupGpeBlock (
ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
ACPI_GPE_BLOCK_INFO *GpeBlock,
void *Context)
{
UINT32 i;
ACPI_STATUS Status;
/* Examine each GPE Register within the block */
for (i = 0; i < GpeBlock->RegisterCount; i++)
{
if (!GpeBlock->RegisterInfo[i].EnableForWake)
{
continue;
}
/* Enable all "wake" GPEs in this register */
Status = AcpiWrite (GpeBlock->RegisterInfo[i].EnableForWake,
&GpeBlock->RegisterInfo[i].EnableAddress);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
return (AE_OK);
}
ACPI_STATUS
AcpiHwExtendedWake (
UINT8 SleepState)
{
ACPI_FUNCTION_TRACE (HwExtendedWake);
/* Ensure EnterSleepStatePrep -> EnterSleepState ordering */
AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID;
/* Execute the wake methods */
AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WAKING);
AcpiHwExecuteSleepMethod (METHOD_PATHNAME__WAK, SleepState);
/*
* Some BIOS code assumes that WAK_STS will be cleared on resume
* and use it to determine whether the system is rebooting or
* resuming. Clear WAK_STS for compatibility.
*/
(void) AcpiWrite ((UINT64) ACPI_X_WAKE_STATUS, &AcpiGbl_FADT.SleepStatus);
AcpiGbl_SystemAwakeAndRunning = TRUE;
AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WORKING);
return_ACPI_STATUS (AE_OK);
}
ACPI_STATUS
AcpiHwClearGpeBlock (
ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
ACPI_GPE_BLOCK_INFO *GpeBlock,
void *Context)
{
UINT32 i;
ACPI_STATUS Status;
/* Examine each GPE Register within the block */
for (i = 0; i < GpeBlock->RegisterCount; i++)
{
/* Clear status on all GPEs in this register */
Status = AcpiWrite (0xFF, &GpeBlock->RegisterInfo[i].StatusAddress);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
return (AE_OK);
}
ACPI_STATUS
AcpiHwEnableRuntimeGpeBlock (
ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
ACPI_GPE_BLOCK_INFO *GpeBlock,
void *Context)
{
UINT32 i;
ACPI_STATUS Status;
/* NOTE: assumes that all GPEs are currently disabled */
/* Examine each GPE Register within the block */
for (i = 0; i < GpeBlock->RegisterCount; i++)
{
if (!GpeBlock->RegisterInfo[i].EnableForRun)
{
continue;
}
/* Enable all "runtime" GPEs in this register */
Status = AcpiWrite (GpeBlock->RegisterInfo[i].EnableForRun,
&GpeBlock->RegisterInfo[i].EnableAddress);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
return (AE_OK);
}
ACPI_STATUS
AcpiHwWriteGpeEnableReg (
ACPI_GPE_EVENT_INFO *GpeEventInfo)
{
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
ACPI_STATUS Status;
ACPI_FUNCTION_ENTRY ();
/* Get the info block for the entire GPE register */
GpeRegisterInfo = GpeEventInfo->RegisterInfo;
if (!GpeRegisterInfo)
{
return (AE_NOT_EXIST);
}
/* Write the entire GPE (runtime) enable register */
Status = AcpiWrite (GpeRegisterInfo->EnableForRun,
&GpeRegisterInfo->EnableAddress);
return (Status);
}
ACPI_STATUS
AcpiHwExtendedWakePrep (
UINT8 SleepState,
UINT8 Flags)
{
ACPI_STATUS Status;
UINT8 SleepTypeValue;
ACPI_FUNCTION_TRACE (HwExtendedWakePrep);
Status = AcpiGetSleepTypeData (ACPI_STATE_S0,
&AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
if (ACPI_SUCCESS (Status))
{
SleepTypeValue = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) &
ACPI_X_SLEEP_TYPE_MASK);
(void) AcpiWrite ((SleepTypeValue | ACPI_X_SLEEP_ENABLE),
&AcpiGbl_FADT.SleepControl);
}
/* Optionally execute _BFS (Back From Sleep) */
if (Flags & ACPI_EXECUTE_BFS)
{
AcpiHwExecuteSleepMethod (METHOD_PATHNAME__BFS, SleepState);
}
return_ACPI_STATUS (AE_OK);
}
ACPI_STATUS
AcpiHwWritePm1Control (
UINT32 Pm1aControl,
UINT32 Pm1bControl)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (HwWritePm1Control);
Status = AcpiWrite (Pm1aControl, &AcpiGbl_FADT.XPm1aControlBlock);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (AcpiGbl_FADT.XPm1bControlBlock.Address)
{
Status = AcpiWrite (Pm1bControl, &AcpiGbl_FADT.XPm1bControlBlock);
}
return_ACPI_STATUS (Status);
}
static ACPI_STATUS
AcpiHwWriteMultiple (
UINT32 Value,
ACPI_GENERIC_ADDRESS *RegisterA,
ACPI_GENERIC_ADDRESS *RegisterB)
{
ACPI_STATUS Status;
/* The first register is always required */
Status = AcpiWrite (Value, RegisterA);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/*
* Second register is optional
*
* No bit shifting or clearing is necessary, because of how the PM1
* registers are defined in the ACPI specification:
*
* "Although the bits can be split between the two register blocks (each
* register block has a unique pointer within the FADT), the bit positions
* are maintained. The register block with unimplemented bits (that is,
* those implemented in the other register block) always returns zeros,
* and writes have no side effects"
*/
if (RegisterB->Address)
{
Status = AcpiWrite (Value, RegisterB);
}
return (Status);
}
ACPI_STATUS
AcpiHwClearGpe (
ACPI_GPE_EVENT_INFO *GpeEventInfo)
{
ACPI_STATUS Status;
UINT8 RegisterBit;
ACPI_FUNCTION_ENTRY ();
RegisterBit = (UINT8) (1 <<
(GpeEventInfo->GpeNumber - GpeEventInfo->RegisterInfo->BaseGpeNumber));
/*
* Write a one to the appropriate bit in the status register to
* clear this GPE.
*/
Status = AcpiWrite (RegisterBit,
&GpeEventInfo->RegisterInfo->StatusAddress);
return (Status);
}
ACPI_STATUS
AcpiHwExtendedWakePrep (
UINT8 SleepState)
{
ACPI_STATUS Status;
UINT8 SleepTypeValue;
ACPI_FUNCTION_TRACE (HwExtendedWakePrep);
Status = AcpiGetSleepTypeData (ACPI_STATE_S0,
&AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
if (ACPI_SUCCESS (Status))
{
SleepTypeValue = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) &
ACPI_X_SLEEP_TYPE_MASK);
(void) AcpiWrite ((UINT64) (SleepTypeValue | ACPI_X_SLEEP_ENABLE),
&AcpiGbl_FADT.SleepControl);
}
return_ACPI_STATUS (AE_OK);
}
ACPI_STATUS
AcpiHwLowDisableGpe (
ACPI_GPE_EVENT_INFO *GpeEventInfo)
{
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
ACPI_STATUS Status;
UINT32 EnableMask;
/* Get the info block for the entire GPE register */
GpeRegisterInfo = GpeEventInfo->RegisterInfo;
if (!GpeRegisterInfo)
{
return (AE_NOT_EXIST);
}
/* Get current value of the enable register that contains this GPE */
Status = AcpiRead (&EnableMask, &GpeRegisterInfo->EnableAddress);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Clear just the bit that corresponds to this GPE */
ACPI_CLEAR_BIT (EnableMask, ((UINT32) 1 <<
(GpeEventInfo->GpeNumber - GpeRegisterInfo->BaseGpeNumber)));
/* Write the updated enable mask */
Status = AcpiWrite (EnableMask, &GpeRegisterInfo->EnableAddress);
return (Status);
}
ACPI_STATUS
AcpiHwExtendedSleep (
UINT8 SleepState)
{
ACPI_STATUS Status;
UINT8 SleepTypeValue;
UINT64 SleepStatus;
ACPI_FUNCTION_TRACE (HwExtendedSleep);
/* Extended sleep registers must be valid */
if (!AcpiGbl_FADT.SleepControl.Address ||
!AcpiGbl_FADT.SleepStatus.Address)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
/* Clear wake status (WAK_STS) */
Status = AcpiWrite ((UINT64) ACPI_X_WAKE_STATUS, &AcpiGbl_FADT.SleepStatus);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
AcpiGbl_SystemAwakeAndRunning = FALSE;
/* Flush caches, as per ACPI specification */
ACPI_FLUSH_CPU_CACHE ();
/*
* Set the SLP_TYP and SLP_EN bits.
*
* Note: We only use the first value returned by the \_Sx method
* (AcpiGbl_SleepTypeA) - As per ACPI specification.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"Entering sleep state [S%u]\n", SleepState));
SleepTypeValue = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) &
ACPI_X_SLEEP_TYPE_MASK);
Status = AcpiWrite ((UINT64) (SleepTypeValue | ACPI_X_SLEEP_ENABLE),
&AcpiGbl_FADT.SleepControl);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Wait for transition back to Working State */
do
{
Status = AcpiRead (&SleepStatus, &AcpiGbl_FADT.SleepStatus);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
} while (!(((UINT8) SleepStatus) & ACPI_X_WAKE_STATUS));
return_ACPI_STATUS (AE_OK);
}
ACPI_STATUS
AcpiHwRegisterWrite (
UINT32 RegisterId,
UINT32 Value)
{
ACPI_STATUS Status;
UINT32 ReadValue;
ACPI_FUNCTION_TRACE (HwRegisterWrite);
switch (RegisterId)
{
case ACPI_REGISTER_PM1_STATUS: /* PM1 A/B: 16-bit access each */
/*
* Handle the "ignored" bit in PM1 Status. According to the ACPI
* specification, ignored bits are to be preserved when writing.
* Normally, this would mean a read/modify/write sequence. However,
* preserving a bit in the status register is different. Writing a
* one clears the status, and writing a zero preserves the status.
* Therefore, we must always write zero to the ignored bit.
*
* This behavior is clarified in the ACPI 4.0 specification.
*/
Value &= ~ACPI_PM1_STATUS_PRESERVED_BITS;
Status = AcpiHwWriteMultiple (Value,
&AcpiGbl_XPm1aStatus,
&AcpiGbl_XPm1bStatus);
break;
case ACPI_REGISTER_PM1_ENABLE: /* PM1 A/B: 16-bit access each */
Status = AcpiHwWriteMultiple (Value,
&AcpiGbl_XPm1aEnable,
&AcpiGbl_XPm1bEnable);
break;
case ACPI_REGISTER_PM1_CONTROL: /* PM1 A/B: 16-bit access each */
/*
* Perform a read first to preserve certain bits (per ACPI spec)
* Note: This includes SCI_EN, we never want to change this bit
*/
Status = AcpiHwReadMultiple (&ReadValue,
&AcpiGbl_FADT.XPm1aControlBlock,
&AcpiGbl_FADT.XPm1bControlBlock);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
/* Insert the bits to be preserved */
ACPI_INSERT_BITS (Value, ACPI_PM1_CONTROL_PRESERVED_BITS, ReadValue);
/* Now we can write the data */
Status = AcpiHwWriteMultiple (Value,
&AcpiGbl_FADT.XPm1aControlBlock,
&AcpiGbl_FADT.XPm1bControlBlock);
break;
case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */
/*
* For control registers, all reserved bits must be preserved,
* as per the ACPI spec.
*/
Status = AcpiRead (&ReadValue, &AcpiGbl_FADT.XPm2ControlBlock);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
/* Insert the bits to be preserved */
ACPI_INSERT_BITS (Value, ACPI_PM2_CONTROL_PRESERVED_BITS, ReadValue);
Status = AcpiWrite (Value, &AcpiGbl_FADT.XPm2ControlBlock);
break;
case ACPI_REGISTER_PM_TIMER: /* 32-bit access */
Status = AcpiWrite (Value, &AcpiGbl_FADT.XPmTimerBlock);
break;
case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */
/* SMI_CMD is currently always in IO space */
Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand, Value, 8);
break;
default:
ACPI_ERROR ((AE_INFO, "Unknown Register ID: %X",
RegisterId));
Status = AE_BAD_PARAMETER;
break;
}
Exit:
return_ACPI_STATUS (Status);
}
