ACPI_STATUS
AcpiHwRead (
UINT32 *Value,
ACPI_GENERIC_ADDRESS *Reg)
{
UINT64 Address;
UINT64 Value64;
ACPI_STATUS Status;
ACPI_FUNCTION_NAME (HwRead);
/* Validate contents of the GAS register */
Status = AcpiHwValidateRegister (Reg, 32, &Address);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Initialize entire 32-bit return value to zero */
*Value = 0;
/*
* Two address spaces supported: Memory or IO. PCI_Config is
* not supported here because the GAS structure is insufficient
*/
if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
{
Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS)
Address, &Value64, Reg->BitWidth);
*Value = (UINT32) Value64;
}
else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
{
Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
Address, Value, Reg->BitWidth);
}
ACPI_DEBUG_PRINT ((ACPI_DB_IO,
"Read: %8.8X width %2d from %8.8X%8.8X (%s)\n",
*Value, Reg->BitWidth, ACPI_FORMAT_UINT64 (Address),
AcpiUtGetRegionName (Reg->SpaceId)));
return (Status);
}
ACPI_STATUS
AcpiExSystemIoSpaceHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
UINT64 *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_STATUS Status = AE_OK;
UINT32 Value32;
ACPI_FUNCTION_TRACE (ExSystemIoSpaceHandler);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
BitWidth, Function, ACPI_FORMAT_UINT64 (Address)));
/* Decode the function parameter */
switch (Function)
{
case ACPI_READ:
Status = AcpiHwReadPort ((ACPI_IO_ADDRESS) Address,
&Value32, BitWidth);
*Value = Value32;
break;
case ACPI_WRITE:
Status = AcpiHwWritePort ((ACPI_IO_ADDRESS) Address,
(UINT32) *Value, BitWidth);
break;
default:
Status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiHwRegisterRead (
UINT32 RegisterId,
UINT32 *ReturnValue)
{
UINT32 Value = 0;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (HwRegisterRead);
switch (RegisterId)
{
case ACPI_REGISTER_PM1_STATUS: /* PM1 A/B: 16-bit access each */
Status = AcpiHwReadMultiple (&Value,
&AcpiGbl_XPm1aStatus,
&AcpiGbl_XPm1bStatus);
break;
case ACPI_REGISTER_PM1_ENABLE: /* PM1 A/B: 16-bit access each */
Status = AcpiHwReadMultiple (&Value,
&AcpiGbl_XPm1aEnable,
&AcpiGbl_XPm1bEnable);
break;
case ACPI_REGISTER_PM1_CONTROL: /* PM1 A/B: 16-bit access each */
Status = AcpiHwReadMultiple (&Value,
&AcpiGbl_FADT.XPm1aControlBlock,
&AcpiGbl_FADT.XPm1bControlBlock);
/*
* Zero the write-only bits. From the ACPI specification, "Hardware
* Write-Only Bits": "Upon reads to registers with write-only bits,
* software masks out all write-only bits."
*/
Value &= ~ACPI_PM1_CONTROL_WRITEONLY_BITS;
break;
case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */
Status = AcpiHwRead (&Value, &AcpiGbl_FADT.XPm2ControlBlock);
break;
case ACPI_REGISTER_PM_TIMER: /* 32-bit access */
Status = AcpiHwRead (&Value, &AcpiGbl_FADT.XPmTimerBlock);
break;
case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */
Status = AcpiHwReadPort (AcpiGbl_FADT.SmiCommand, &Value, 8);
break;
default:
ACPI_ERROR ((AE_INFO, "Unknown Register ID: 0x%X",
RegisterId));
Status = AE_BAD_PARAMETER;
break;
}
if (ACPI_SUCCESS (Status))
{
*ReturnValue = Value;
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AeRegionHandler (
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
UINT64 *Value,
void *HandlerContext,
void *RegionContext)
{
ACPI_OPERAND_OBJECT *RegionObject = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, RegionContext);
UINT8 *Buffer = ACPI_CAST_PTR (UINT8, Value);
ACPI_PHYSICAL_ADDRESS BaseAddress;
ACPI_SIZE Length;
BOOLEAN BufferExists;
AE_REGION *RegionElement;
void *BufferValue;
ACPI_STATUS Status;
UINT32 ByteWidth;
UINT32 i;
UINT8 SpaceId;
ACPI_FUNCTION_NAME (AeRegionHandler);
/*
* If the object is not a region, simply return
*/
if (RegionObject->Region.Type != ACPI_TYPE_REGION)
{
return AE_OK;
}
/*
* Region support can be disabled with the -r option.
* We use this to support dynamically loaded tables where we pass a valid
* address to the AML.
*/
if (AcpiGbl_DbOpt_NoRegionSupport)
{
BufferValue = ACPI_TO_POINTER (Address);
ByteWidth = (BitWidth / 8);
if (BitWidth % 8)
{
ByteWidth += 1;
}
goto DoFunction;
}
/*
* Find the region's address space and length before searching
* the linked list.
*/
BaseAddress = RegionObject->Region.Address;
Length = (ACPI_SIZE) RegionObject->Region.Length;
SpaceId = RegionObject->Region.SpaceId;
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Operation Region request on %s at 0x%X\n",
AcpiUtGetRegionName (RegionObject->Region.SpaceId),
(UINT32) Address));
switch (SpaceId)
{
case ACPI_ADR_SPACE_SYSTEM_IO:
/*
* For I/O space, exercise the port validation
*/
switch (Function & ACPI_IO_MASK)
{
case ACPI_READ:
Status = AcpiHwReadPort (Address, (UINT32 *) Value, BitWidth);
break;
case ACPI_WRITE:
Status = AcpiHwWritePort (Address, (UINT32) *Value, BitWidth);
break;
default:
Status = AE_BAD_PARAMETER;
break;
}
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Now go ahead and simulate the hardware */
break;
case ACPI_ADR_SPACE_SMBUS:
Length = 0;
switch (Function & ACPI_IO_MASK)
{
case ACPI_READ:
switch (Function >> 16)
{
case AML_FIELD_ATTRIB_SMB_QUICK:
case AML_FIELD_ATTRIB_SMB_SEND_RCV:
case AML_FIELD_ATTRIB_SMB_BYTE:
Length = 1;
break;
case AML_FIELD_ATTRIB_SMB_WORD:
case AML_FIELD_ATTRIB_SMB_WORD_CALL:
Length = 2;
break;
case AML_FIELD_ATTRIB_SMB_BLOCK:
case AML_FIELD_ATTRIB_SMB_BLOCK_CALL:
Length = 32;
break;
default:
break;
}
break;
case ACPI_WRITE:
switch (Function >> 16)
{
case AML_FIELD_ATTRIB_SMB_QUICK:
case AML_FIELD_ATTRIB_SMB_SEND_RCV:
case AML_FIELD_ATTRIB_SMB_BYTE:
case AML_FIELD_ATTRIB_SMB_WORD:
case AML_FIELD_ATTRIB_SMB_BLOCK:
Length = 0;
break;
case AML_FIELD_ATTRIB_SMB_WORD_CALL:
Length = 2;
break;
case AML_FIELD_ATTRIB_SMB_BLOCK_CALL:
Length = 32;
break;
default:
break;
}
break;
default:
break;
}
for (i = 0; i < Length; i++)
{
Buffer[i+2] = (UINT8) (0xA0 + i);
}
Buffer[0] = 0x7A;
Buffer[1] = (UINT8) Length;
return (AE_OK);
case ACPI_ADR_SPACE_IPMI: /* ACPI 4.0 */
AcpiOsPrintf ("AcpiExec: Received IPMI request: "
"Address %X BaseAddress %X Length %X Width %X BufferLength %u\n",
(UINT32) Address, (UINT32) BaseAddress,
Length, BitWidth, Buffer[1]);
/*
* Regardless of a READ or WRITE, this handler is passed a 66-byte
* buffer in which to return the IPMI status/length/data.
*
* Return some example data to show use of the bidirectional buffer
*/
Buffer[0] = 0; /* Status byte */
Buffer[1] = 64; /* Return buffer data length */
Buffer[2] = 0; /* Completion code */
Buffer[3] = 0x34; /* Power measurement */
Buffer[4] = 0x12; /* Power measurement */
Buffer[65] = 0xEE; /* last buffer byte */
return (AE_OK);
default:
break;
}
/*
* Search through the linked list for this region's buffer
*/
BufferExists = FALSE;
RegionElement = AeRegions.RegionList;
if (AeRegions.NumberOfRegions)
{
while (!BufferExists && RegionElement)
{
if (RegionElement->Address == BaseAddress &&
RegionElement->Length == Length &&
RegionElement->SpaceId == SpaceId)
{
BufferExists = TRUE;
}
else
{
RegionElement = RegionElement->NextRegion;
}
}
}
/*
* If the Region buffer does not exist, create it now
*/
if (!BufferExists)
{
/*
* Do the memory allocations first
*/
RegionElement = AcpiOsAllocate (sizeof (AE_REGION));
if (!RegionElement)
{
return AE_NO_MEMORY;
}
RegionElement->Buffer = AcpiOsAllocate (Length);
if (!RegionElement->Buffer)
{
AcpiOsFree (RegionElement);
return AE_NO_MEMORY;
}
/* Initialize the region with the default fill value */
ACPI_MEMSET (RegionElement->Buffer, AcpiGbl_RegionFillValue, Length);
RegionElement->Address = BaseAddress;
RegionElement->Length = Length;
RegionElement->SpaceId = SpaceId;
RegionElement->NextRegion = NULL;
/*
* Increment the number of regions and put this one
* at the head of the list as it will probably get accessed
* more often anyway.
*/
AeRegions.NumberOfRegions += 1;
if (AeRegions.RegionList)
{
RegionElement->NextRegion = AeRegions.RegionList;
}
AeRegions.RegionList = RegionElement;
}
/*
* Calculate the size of the memory copy
*/
ByteWidth = (BitWidth / 8);
if (BitWidth % 8)
{
ByteWidth += 1;
}
/*
* The buffer exists and is pointed to by RegionElement.
* We now need to verify the request is valid and perform the operation.
*
* NOTE: RegionElement->Length is in bytes, therefore it we compare against
* ByteWidth (see above)
*/
if (((UINT64) Address + ByteWidth) >
((UINT64)(RegionElement->Address) + RegionElement->Length))
{
ACPI_WARNING ((AE_INFO,
"Request on [%4.4s] is beyond region limit Req-0x%X+0x%X, Base=0x%X, Len-0x%X",
(RegionObject->Region.Node)->Name.Ascii, (UINT32) Address,
ByteWidth, (UINT32)(RegionElement->Address),
RegionElement->Length));
return AE_AML_REGION_LIMIT;
}
/*
* Get BufferValue to point to the "address" in the buffer
*/
BufferValue = ((UINT8 *) RegionElement->Buffer +
((UINT64) Address - (UINT64) RegionElement->Address));
DoFunction:
/*
* Perform a read or write to the buffer space
*/
switch (Function)
{
case ACPI_READ:
/*
* Set the pointer Value to whatever is in the buffer
*/
ACPI_MEMCPY (Value, BufferValue, ByteWidth);
break;
case ACPI_WRITE:
/*
* Write the contents of Value to the buffer
*/
ACPI_MEMCPY (BufferValue, Value, ByteWidth);
break;
default:
return AE_BAD_PARAMETER;
}
return AE_OK;
}
ACPI_STATUS
AcpiHwWrite (
UINT32 Value,
ACPI_GENERIC_ADDRESS *Reg)
{
UINT64 Address;
UINT8 AccessWidth;
UINT32 BitWidth;
UINT8 BitOffset;
UINT64 Value64;
UINT32 NewValue32, OldValue32;
UINT8 Index;
ACPI_STATUS Status;
ACPI_FUNCTION_NAME (HwWrite);
/* Validate contents of the GAS register */
Status = AcpiHwValidateRegister (Reg, 32, &Address);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Convert AccessWidth into number of bits based */
AccessWidth = Reg->AccessWidth ? Reg->AccessWidth : 1;
AccessWidth = 1 << (AccessWidth + 2);
BitWidth = ACPI_ROUND_UP (Reg->BitOffset + Reg->BitWidth, AccessWidth);
BitOffset = Reg->BitOffset;
/*
* Two address spaces supported: Memory or IO. PCI_Config is
* not supported here because the GAS structure is insufficient
*/
Index = 0;
while (BitWidth)
{
NewValue32 = ACPI_GET_BITS (&Value, (Index * AccessWidth),
((1 << AccessWidth) - 1));
if (BitOffset > AccessWidth)
{
BitOffset -= AccessWidth;
}
else
{
if (BitOffset)
{
NewValue32 &= ACPI_MASK_BITS_BELOW (BitOffset);
}
if (BitWidth < AccessWidth)
{
NewValue32 &= ACPI_MASK_BITS_ABOVE (BitWidth);
}
if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
{
if (BitOffset || BitWidth < AccessWidth)
{
/*
* Read old values in order not to modify the bits that
* are beyond the register BitWidth/BitOffset setting.
*/
Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS)
Address + Index * ACPI_DIV_8 (AccessWidth),
&Value64, AccessWidth);
OldValue32 = (UINT32) Value64;
if (BitOffset)
{
OldValue32 &= ACPI_MASK_BITS_ABOVE (BitOffset + 1);
BitOffset = 0;
}
if (BitWidth < AccessWidth)
{
OldValue32 &= ACPI_MASK_BITS_BELOW (BitWidth - 1);
}
NewValue32 |= OldValue32;
}
Value64 = (UINT64) NewValue32;
Status = AcpiOsWriteMemory ((ACPI_PHYSICAL_ADDRESS)
Address + Index * ACPI_DIV_8 (AccessWidth),
Value64, AccessWidth);
}
else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
{
if (BitOffset || BitWidth < AccessWidth)
{
/*
* Read old values in order not to modify the bits that
* are beyond the register BitWidth/BitOffset setting.
*/
Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
Address + Index * ACPI_DIV_8 (AccessWidth),
&OldValue32, AccessWidth);
if (BitOffset)
{
OldValue32 &= ACPI_MASK_BITS_ABOVE (BitOffset + 1);
BitOffset = 0;
}
if (BitWidth < AccessWidth)
{
OldValue32 &= ACPI_MASK_BITS_BELOW (BitWidth - 1);
}
NewValue32 |= OldValue32;
}
Status = AcpiHwWritePort ((ACPI_IO_ADDRESS)
Address + Index * ACPI_DIV_8 (AccessWidth),
NewValue32, AccessWidth);
}
}
BitWidth -= BitWidth > AccessWidth ? AccessWidth : BitWidth;
Index++;
}
ACPI_DEBUG_PRINT ((ACPI_DB_IO,
"Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n",
Value, AccessWidth, ACPI_FORMAT_UINT64 (Address),
AcpiUtGetRegionName (Reg->SpaceId)));
return (Status);
}
ACPI_STATUS
AcpiHwRead (
UINT32 *Value,
ACPI_GENERIC_ADDRESS *Reg)
{
UINT64 Address;
UINT8 AccessWidth;
UINT32 BitWidth;
UINT8 BitOffset;
UINT64 Value64;
UINT32 Value32;
UINT8 Index;
ACPI_STATUS Status;
ACPI_FUNCTION_NAME (HwRead);
/* Validate contents of the GAS register */
Status = AcpiHwValidateRegister (Reg, 32, &Address);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/*
* Initialize entire 32-bit return value to zero, convert AccessWidth
* into number of bits based
*/
*Value = 0;
AccessWidth = Reg->AccessWidth ? Reg->AccessWidth : 1;
AccessWidth = 1 << (AccessWidth + 2);
BitWidth = ACPI_ROUND_UP (Reg->BitOffset + Reg->BitWidth, AccessWidth);
BitOffset = Reg->BitOffset;
/*
* Two address spaces supported: Memory or IO. PCI_Config is
* not supported here because the GAS structure is insufficient
*/
Index = 0;
while (BitWidth)
{
if (BitOffset > AccessWidth)
{
Value32 = 0;
BitOffset -= AccessWidth;
}
else
{
if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
{
Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS)
Address + Index * ACPI_DIV_8 (AccessWidth),
&Value64, AccessWidth);
Value32 = (UINT32) Value64;
}
else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
{
Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
Address + Index * ACPI_DIV_8 (AccessWidth),
&Value32, AccessWidth);
}
if (BitOffset)
{
Value32 &= ACPI_MASK_BITS_BELOW (BitOffset);
BitOffset = 0;
}
if (BitWidth < AccessWidth)
{
Value32 &= ACPI_MASK_BITS_ABOVE (BitWidth);
}
}
ACPI_SET_BITS (Value, Index * AccessWidth,
((1 << AccessWidth) - 1), Value32);
BitWidth -= BitWidth > AccessWidth ? AccessWidth : BitWidth;
Index++;
}
ACPI_DEBUG_PRINT ((ACPI_DB_IO,
"Read: %8.8X width %2d from %8.8X%8.8X (%s)\n",
*Value, AccessWidth, ACPI_FORMAT_UINT64 (Address),
AcpiUtGetRegionName (Reg->SpaceId)));
return (Status);
}
ACPI_STATUS
AcpiHwRead (
UINT64 *Value,
ACPI_GENERIC_ADDRESS *Reg)
{
UINT64 Address;
UINT8 AccessWidth;
UINT32 BitWidth;
UINT8 BitOffset;
UINT64 Value64;
UINT32 Value32;
UINT8 Index;
ACPI_STATUS Status;
ACPI_FUNCTION_NAME (HwRead);
/* Validate contents of the GAS register */
Status = AcpiHwValidateRegister (Reg, 64, &Address);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/*
* Initialize entire 64-bit return value to zero, convert AccessWidth
* into number of bits based
*/
*Value = 0;
AccessWidth = AcpiHwGetAccessBitWidth (Address, Reg, 64);
BitWidth = Reg->BitOffset + Reg->BitWidth;
BitOffset = Reg->BitOffset;
/*
* Two address spaces supported: Memory or IO. PCI_Config is
* not supported here because the GAS structure is insufficient
*/
Index = 0;
while (BitWidth)
{
if (BitOffset >= AccessWidth)
{
Value64 = 0;
BitOffset -= AccessWidth;
}
else
{
if (Reg->SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY)
{
Status = AcpiOsReadMemory ((ACPI_PHYSICAL_ADDRESS)
Address + Index * ACPI_DIV_8 (AccessWidth),
&Value64, AccessWidth);
}
else /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
{
Status = AcpiHwReadPort ((ACPI_IO_ADDRESS)
Address + Index * ACPI_DIV_8 (AccessWidth),
&Value32, AccessWidth);
Value64 = (UINT64) Value32;
}
}
/*
* Use offset style bit writes because "Index * AccessWidth" is
* ensured to be less than 64-bits by AcpiHwValidateRegister().
*/
ACPI_SET_BITS (Value, Index * AccessWidth,
ACPI_MASK_BITS_ABOVE_64 (AccessWidth), Value64);
BitWidth -= BitWidth > AccessWidth ? AccessWidth : BitWidth;
Index++;
}
ACPI_DEBUG_PRINT ((ACPI_DB_IO,
"Read: %8.8X%8.8X width %2d from %8.8X%8.8X (%s)\n",
ACPI_FORMAT_UINT64 (*Value), AccessWidth,
ACPI_FORMAT_UINT64 (Address), AcpiUtGetRegionName (Reg->SpaceId)));
return (Status);
}
