| 摘要 |
<p>The method comprises: a dedicated loader loading step for loading a dedicated loader (123) into 0 MB-1 MB of a RAM (12) from a PCI (2) in response to startup of the BIOS; a management file loading step for setting a DPL of "0" in 1 MB-100 MB of the RAM (12), in which a management file (125) for monitoring access to 1 MB-100 MB of the OS loaded into 101 MB-4 GB of the RAM (12) is loaded by the dedicated loader (123) into 1 MB-100 MB from the PCI (2); and an access protection information setup step for setting a DPL of "2" or a DPL of "3" in 101 MB-4 GB, between loading of the management file (125) and loading of the OS. In response to startup of the BIOS, a secure area is created in a first area within the main memory, and the access protection information is differentiated, disabling improper access from a second area and ensuring a secure area within the main memory.</p> |
