ACPI_HI_RSDP_WINDOW_SIZE
mapsize = ACPI_HI_RSDP_WINDOW_SIZE;
ACPI_HI_RSDP_WINDOW_SIZE);
ACPI_HI_RSDP_WINDOW_BASE, ACPI_HI_RSDP_WINDOW_SIZE));
TablePtr, ACPI_HI_RSDP_WINDOW_SIZE);
AcpiOsUnmapMemory (TablePtr, ACPI_HI_RSDP_WINDOW_SIZE);
rsdp = scan_rsdp(&paddr, ACPI_HI_RSDP_WINDOW_SIZE);