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 = AcpiHwWrite (GpeBlock->RegisterInfo[i].EnableForRun,
&GpeBlock->RegisterInfo[i].EnableAddress);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
return (AE_OK);
}
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 = AcpiHwWrite (GpeBlock->RegisterInfo[i].EnableForWake,
&GpeBlock->RegisterInfo[i].EnableAddress);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
return (AE_OK);
}
ACPI_STATUS
AcpiHwClearGpe (
ACPI_GPE_EVENT_INFO *GpeEventInfo)
{
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
ACPI_STATUS Status;
UINT32 RegisterBit;
ACPI_FUNCTION_ENTRY ();
/* Get the info block for the entire GPE register */
GpeRegisterInfo = GpeEventInfo->RegisterInfo;
if (!GpeRegisterInfo)
{
return (AE_NOT_EXIST);
}
/*
* Write a one to the appropriate bit in the status register to
* clear this GPE.
*/
RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo, GpeRegisterInfo);
Status = AcpiHwWrite (RegisterBit,
&GpeRegisterInfo->StatusAddress);
return (Status);
}
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 = AcpiHwWrite (0xFF, &GpeBlock->RegisterInfo[i].StatusAddress);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
return (AE_OK);
}
static ACPI_STATUS
AcpiHwGpeEnableWrite (
UINT8 EnableMask,
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo)
{
ACPI_STATUS Status;
GpeRegisterInfo->EnableMask = EnableMask;
Status = AcpiHwWrite (EnableMask, &GpeRegisterInfo->EnableAddress);
return (Status);
}
ACPI_STATUS
AcpiHwWritePm1Control (
UINT32 Pm1aControl,
UINT32 Pm1bControl)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (HwWritePm1Control);
Status = AcpiHwWrite (Pm1aControl, &AcpiGbl_FADT.XPm1aControlBlock);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (AcpiGbl_FADT.XPm1bControlBlock.Address)
{
Status = AcpiHwWrite (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 = AcpiHwWrite (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 = AcpiHwWrite (Value, RegisterB);
}
return (Status);
}
static ACPI_STATUS
AcpiEvCreateGpeInfoBlocks (
ACPI_GPE_BLOCK_INFO *GpeBlock)
{
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo = NULL;
ACPI_GPE_EVENT_INFO *GpeEventInfo = NULL;
ACPI_GPE_EVENT_INFO *ThisEvent;
ACPI_GPE_REGISTER_INFO *ThisRegister;
UINT32 i;
UINT32 j;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvCreateGpeInfoBlocks);
/* Allocate the GPE register information block */
GpeRegisterInfo = ACPI_ALLOCATE_ZEROED (
(ACPI_SIZE) GpeBlock->RegisterCount *
sizeof (ACPI_GPE_REGISTER_INFO));
if (!GpeRegisterInfo)
{
ACPI_ERROR ((AE_INFO,
"Could not allocate the GpeRegisterInfo table"));
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* Allocate the GPE EventInfo block. There are eight distinct GPEs
* per register. Initialization to zeros is sufficient.
*/
GpeEventInfo = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) GpeBlock->GpeCount *
sizeof (ACPI_GPE_EVENT_INFO));
if (!GpeEventInfo)
{
ACPI_ERROR ((AE_INFO,
"Could not allocate the GpeEventInfo table"));
Status = AE_NO_MEMORY;
goto ErrorExit;
}
/* Save the new Info arrays in the GPE block */
GpeBlock->RegisterInfo = GpeRegisterInfo;
GpeBlock->EventInfo = GpeEventInfo;
/*
* Initialize the GPE Register and Event structures. A goal of these
* tables is to hide the fact that there are two separate GPE register
* sets in a given GPE hardware block, the status registers occupy the
* first half, and the enable registers occupy the second half.
*/
ThisRegister = GpeRegisterInfo;
ThisEvent = GpeEventInfo;
for (i = 0; i < GpeBlock->RegisterCount; i++)
{
/* Init the RegisterInfo for this GPE register (8 GPEs) */
ThisRegister->BaseGpeNumber = (UINT16)
(GpeBlock->BlockBaseNumber + (i * ACPI_GPE_REGISTER_WIDTH));
ThisRegister->StatusAddress.Address =
GpeBlock->Address + i;
ThisRegister->EnableAddress.Address =
GpeBlock->Address + i + GpeBlock->RegisterCount;
ThisRegister->StatusAddress.SpaceId = GpeBlock->SpaceId;
ThisRegister->EnableAddress.SpaceId = GpeBlock->SpaceId;
ThisRegister->StatusAddress.BitWidth = ACPI_GPE_REGISTER_WIDTH;
ThisRegister->EnableAddress.BitWidth = ACPI_GPE_REGISTER_WIDTH;
ThisRegister->StatusAddress.BitOffset = 0;
ThisRegister->EnableAddress.BitOffset = 0;
/* Init the EventInfo for each GPE within this register */
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
{
ThisEvent->GpeNumber = (UINT8) (ThisRegister->BaseGpeNumber + j);
ThisEvent->RegisterInfo = ThisRegister;
ThisEvent++;
}
/* Disable all GPEs within this register */
Status = AcpiHwWrite (0x00, &ThisRegister->EnableAddress);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
/* Clear any pending GPE events within this register */
Status = AcpiHwWrite (0xFF, &ThisRegister->StatusAddress);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
ThisRegister++;
}
return_ACPI_STATUS (AE_OK);
ErrorExit:
if (GpeRegisterInfo)
{
ACPI_FREE (GpeRegisterInfo);
}
if (GpeEventInfo)
{
ACPI_FREE (GpeEventInfo);
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiHwLowSetGpe (
ACPI_GPE_EVENT_INFO *GpeEventInfo,
UINT32 Action)
{
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
ACPI_STATUS Status;
UINT32 EnableMask;
UINT32 RegisterBit;
ACPI_FUNCTION_ENTRY ();
/* 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 = AcpiHwRead (&EnableMask, &GpeRegisterInfo->EnableAddress);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Set or clear just the bit that corresponds to this GPE */
RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo, GpeRegisterInfo);
switch (Action)
{
case ACPI_GPE_CONDITIONAL_ENABLE:
/* Only enable if the EnableForRun bit is set */
if (!(RegisterBit & GpeRegisterInfo->EnableForRun))
{
return (AE_BAD_PARAMETER);
}
/*lint -fallthrough */
case ACPI_GPE_ENABLE:
ACPI_SET_BIT (EnableMask, RegisterBit);
break;
case ACPI_GPE_DISABLE:
ACPI_CLEAR_BIT (EnableMask, RegisterBit);
break;
default:
ACPI_ERROR ((AE_INFO, "Invalid GPE Action, %u\n", Action));
return (AE_BAD_PARAMETER);
}
/* Write the updated enable mask */
Status = AcpiHwWrite (EnableMask, &GpeRegisterInfo->EnableAddress);
return (Status);
}
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 = AcpiHwRead (&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 = AcpiHwWrite (Value, &AcpiGbl_FADT.XPm2ControlBlock);
break;
case ACPI_REGISTER_PM_TIMER: /* 32-bit access */
Status = AcpiHwWrite (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: 0x%X",
RegisterId));
Status = AE_BAD_PARAMETER;
break;
}
Exit:
return_ACPI_STATUS (Status);
}
