公开(公告)号：US11436379B2

公开(公告)日：2022-09-06

申请号：US16550578

申请日：2019-08-26

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Raghu Vamsi Krishna Talanki ,  Krishna Mogilipuvvu

IPC: G06F21/79 ,  G06F9/4401 ,  G06F21/57 ,  G06F13/16 ,  G06F12/10 ,  G06F12/0804

Abstract: A method for securing one or more cells of a dynamic random-access memory (DRAM) device embedded in a system includes: (1) triggering, by one of a boot loader, an operating system (OS) and an application, a system management interrupt (SMI), (2) invoking, by a basic input/output system (BIOS), a BIOS SMI handler, (3) converting a physical address of secure data to a DRAM address using a reliability, availability and serviceability (RAS) protocol of a BIOS, and (4) performing a write protect operation on the secure data present in the DRAM device by issuing a device-supported security command in a BIOS SMI service routine.