公开(公告)号：US20200226264A1

公开(公告)日：2020-07-16

申请号：US16832922

申请日：2020-03-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shifeng XU ,  Xi CHEN

IPC: G06F21/57 ,  G06F21/44 ,  G06F21/60 ,  G06F9/4401 ,  G11C11/412

Abstract: One example method includes copying code and a security signature of a first off-chip boot to a static random access memory (SRAM) for signature verification, where a function implemented by the first off-chip boot includes initializing a double data rate synchronous dynamic random access memory (DDR), and the DDR initialization includes configuring a DDR secure zone, executing, in the SRAM, the code of the first off-chip boot after the signature verification on the first off-chip boot succeeds to initialize the DDR and configure the DDR secure zone, copying code and a security signature of a second off-chip boot to the DDR secure zone for signature verification, where the second off-chip boot is all of other boots in off-chip boots except the first off-chip boot, and executing, in the DDR secure zone, the code of the second off-chip boot after the signature verification on the second off-chip boot succeeds.