Secure processor chip and terminal device

A method for a processor chip, wherein the processor chip comprises a memory controller, an application processor, and a communication processor, and wherein the method comprises:

• defining, by the memory controller, an area of a memory as a secure memory;
• allowing, by the memory controller, only an access request with a security attribute to access the secure memory;
• executing, by the application processor, a common application in a rich execution environment;
• entering, by the application processor, a trusted execution environment after being triggered by the common application;
• executing, by the application processor, a secure application in the trusted execution environment;
• writing, by the application processor, an instruction request for a secure element into the secure memory using the secure application by sending an access request for the secure memory, wherein the access request for the secure memory sent by the application processor in the trusted execution environment has the security attribute;
• reading, by the communication processor, the instruction request from the secure memory in the trusted execution environment;
• and
• sending, by the communication processor, the instruction request to the secure element.