Method, device and chip for reading boot loader based on system on chip (SoC)

Abstract

The embodiment of the invention discloses a method, a device and a chip for reading a boot loader based on a system on chip (SoC). A nonvolatile memory and a read-only memory (ROM) are arranged on the SoC, and the method comprises the following steps of: after the SoC is electrified, acquiring a control bit saved on the nonvolatile memory; and reading the boot loader from a memory indicated by the acquired control bit. The memory for reading the boot loader is indicated by the control bit saved on the nonvolatile memory of the SoC, so that a pin on the SoC is saved; and moreover, because the control bit saved on the nonvolatile memory is difficult to change, the boot loader on the memory is difficult to read by maliciously changing the control bit correspondingly; and therefore, the safety of the memory is improved.

Description

technical field [0001] The invention relates to the technical field of chip design, in particular to a boot loader reading method, device and chip based on a System on Chip (SoC, System on Chip). Background technique [0002] System on Chip (SoC, System on Chip) refers to an electronic device that integrates all or part of the necessary electronic circuits on a single chip. Usually, the SoC can integrate a central processing unit (CPU, Central Processing Unit) and various memories. For example, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), programmable memory (FLASH), electrically erasable programmable memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), Non-volatile random access memory (NVRAM, Non-Volatile Random Access Memory), etc., and the device where the SoC is located may also be provided with a memory. When the SoC is powered on, it needs to read the bootloader program from the memory. Since the SoC cor...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a SoC-based boot loader reading method, device and chip to solve the problem in the prior art that memory security is reduced by setting special pins on the SoC chip to select memory

Images