System capable of realizing bootload, bootload control device and method

Abstract

The invention discloses a system capable of realizing bootload, a bootload control device and a bootload control method. A bootloader is stored in a first non-volatile memory device which does not support execute in place (XIP) and has an automatic reading characteristic; a first part of codes capable of being automatic read of the bootloader are backed up in a second non-volatile memory device, and a second residual part of codes of the bootloader are backed up in the first non-volatile memory device; a logic chip reads the backup of the first part of codes to a built-in random access memory(RAM), and switches connection between the boot chip selection output of a central processing unit (CPU) and the chip selection input of the first non-volatile memory device and the connection between the boot chip selection output of the CPU and the chip selection input of the built-in RAM for the CPU to acquire the first part of codes from the first non-volatile memory device or acquire the backup of the first part of codes from the built-in RAM; and the logic chip also can provide the second part of codes or the position information of any backup of the second part of codes in the first non-volatile memory device for the CPU, thereby realizing the backup boot of the second part of codes.

Description

technical field [0001] The present invention relates to a boot technology for equipment startup, in particular to a system capable of realizing boot startup, a boot startup control device, and a boot startup control method. Background technique [0002] The boot program of the system is a small program that runs before the CPU runs the operating system kernel, for the CPU to initialize hardware devices and establish a memory space map, so as to bring the system's software and hardware environment to a suitable state, so that Prepare the correct environment for the CPU to finally call the operating system kernel. [0003] In practical applications, the bootloader is usually stored on a non-volatile storage device that supports in-chip execution (eXecute In Place, XIP) operations, so that the CPU can access the non-volatile storage device in the same way as accessing memory, using to directly execute the boot program stored in the non-volatile memory device. For example, NOR...

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