static ACPI_STATUS
AcpiExRegionRead (
ACPI_OPERAND_OBJECT *ObjDesc,
UINT32 Length,
UINT8 *Buffer)
{
ACPI_STATUS Status;
UINT64 Value;
UINT32 RegionOffset = 0;
UINT32 i;
/* Bytewise reads */
for (i = 0; i < Length; i++)
{
Status = AcpiEvAddressSpaceDispatch (ObjDesc, ACPI_READ,
RegionOffset, 8, &Value);
if (ACPI_FAILURE (Status))
{
return (Status);
}
*Buffer = (UINT8) Value;
Buffer++;
RegionOffset++;
}
return (AE_OK);
}
ACPI_STATUS
AcpiExAccessRegion (
ACPI_OPERAND_OBJECT *ObjDesc,
UINT32 FieldDatumByteOffset,
UINT64 *Value,
UINT32 Function)
{
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT *RgnDesc;
UINT32 RegionOffset;
ACPI_FUNCTION_TRACE (ExAccessRegion);
/*
* Ensure that the region operands are fully evaluated and verify
* the validity of the request
*/
Status = AcpiExSetupRegion (ObjDesc, FieldDatumByteOffset);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* The physical address of this field datum is:
*
* 1) The base of the region, plus
* 2) The base offset of the field, plus
* 3) The current offset into the field
*/
RgnDesc = ObjDesc->CommonField.RegionObj;
RegionOffset =
ObjDesc->CommonField.BaseByteOffset +
FieldDatumByteOffset;
if ((Function & ACPI_IO_MASK) == ACPI_READ)
{
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "[READ]"));
}
else
{
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "[WRITE]"));
}
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_BFIELD,
" Region [%s:%X], Width %X, ByteBase %X, Offset %X at %8.8X%8.8X\n",
AcpiUtGetRegionName (RgnDesc->Region.SpaceId),
RgnDesc->Region.SpaceId,
ObjDesc->CommonField.AccessByteWidth,
ObjDesc->CommonField.BaseByteOffset,
FieldDatumByteOffset,
ACPI_FORMAT_UINT64 (RgnDesc->Region.Address + RegionOffset)));
/* Invoke the appropriate AddressSpace/OpRegion handler */
Status = AcpiEvAddressSpaceDispatch (RgnDesc, ObjDesc,
Function, RegionOffset,
ACPI_MUL_8 (ObjDesc->CommonField.AccessByteWidth), Value);
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_IMPLEMENTED)
{
ACPI_ERROR ((AE_INFO,
"Region %s (ID=%u) not implemented",
AcpiUtGetRegionName (RgnDesc->Region.SpaceId),
RgnDesc->Region.SpaceId));
}
else if (Status == AE_NOT_EXIST)
{
ACPI_ERROR ((AE_INFO,
"Region %s (ID=%u) has no handler",
AcpiUtGetRegionName (RgnDesc->Region.SpaceId),
RgnDesc->Region.SpaceId));
}
}
return_ACPI_STATUS (Status);
}