ACPI_IORT_ID_MAPPING
Length = sizeof (ACPI_IORT_ID_MAPPING);
NodeLength += sizeof (ACPI_IORT_ID_MAPPING);
#define ACPI_IORTM_OFFSET(f) (UINT16) ACPI_OFFSET (ACPI_IORT_ID_MAPPING,f)
#define ACPI_IORTM_FLAG_OFFSET(f,o) ACPI_FLAG_OFFSET (ACPI_IORT_ID_MAPPING,f,o)