Operating system startup booting method capable of aiming at system on chip

Abstract

The invention provides an operating system startup booting method capable of aiming at a system on chip. The method comprises the following steps that: 1) after the system on chip is electrified, starting an onboard RBL (ROM (Read Only Memory) bootloader), reading a first-level bootloader into memory from Nor Flash, wherein the first-level bootloader only comprises a PLL (Phase Locked Loop) configuration unit, a first board level hardware initialization unit used for supporting PLL configuration, and a second-level bootloader loading unit; 2) operating the first-level bootloader in the memory,executing the code of the first board level hardware initialization unit by a processor to finish the initialization of the board level hardware used for supporting the PLL configuration, executing the code of the PLL configuration unit to maximize the clock frequency of an ARM (Advanced RISC Machines) core and the clock frequency of an SPI (Serial Peripheral Interface) bus, and executing the code of the second-level bootloader loading unit to load a second-level bootloader to the memory from the Nor Flash; and 3) executing the code of the second-level bootloader to finish Linux startup booting. By use of the method, the startup booting time of the operating system of the SoC can be shortened.

Description

technical field [0001] The present invention relates to the technical field of embedded operating system and embedded drive, in particular, the present invention relates to an operating system booting method for a system on a chip. Background technique [0002] A System on Chip (SoC for short) is also called a chip-level system, and it has been widely used in the market at present. Existing SoCs often carry a Linux operating system and implement various design functions through the operating system. For example, for a multi-core ARM-based chip structure, transplanting SMP Linux symmetric multi-core processing system on ARM can make users not care about how many ARM cores there are in the SoC, task scheduling and memory allocation are completed by the Linux kernel, and the operating system shields users The underlying hardware information is obtained, and hardware virtualization is realized. [0003] The Linux operating system usually requires a Boot Loader to boot and star...

AI Technical Summary

Problems solved by technology

This method can shorten the booting time of the Linux operating system startup, but for some SoCs with more complex structures (such as SoCs based on TI's KeyStone II architecture processor), the software and hardware environments required to start the operating system are also very difficult. More complicated, this solution still has the problem of too long boot time

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