ACPI_EBDA_PTR_LOCATION
mapp = AcpiOsMapMemory((ACPI_PHYSICAL_ADDRESS)ACPI_EBDA_PTR_LOCATION,
(ACPI_PHYSICAL_ADDRESS) ACPI_EBDA_PTR_LOCATION,
ACPI_EBDA_PTR_LOCATION, ACPI_EBDA_PTR_LENGTH));
ACPI_EBDA_PTR_LOCATION);