ACPI_SIG_DMAR
{ACPI_SIG_DMAR, "DMA Remapping table"},
{ACPI_SIG_DMAR, NULL, AcpiDmDumpDmar, DtCompileDmar, TemplateDmar},
status = AcpiGetTable(ACPI_SIG_DMAR, 0, (ACPI_TABLE_HEADER **)&dmar);