Starting system for embedded equipment on basis of single storage

Abstract

The invention provides a starting system for embedded equipment on the basis of a single storage, which at least comprises a central processor, a system bus, peripheral bus equipment and a single-type storage, wherein the single-type storage is connected with the central processor by the system bus; the single-type storage is divided into a start program storage region, a kernel storage region, a file system storage region and a system RAM (Random Access Memory) region to ensure the embedded equipment to execute the start operation in two conventional and XIP (eXecute In Place) start modes, so that the sharing of a storage space can be implemented; the size of each storage region can be regulated as required; the starting system is convenient to implement software upgrading and high efficiency operation of the embedded equipment; and meanwhile, a CPU (Central Processing Unit) interface can be simplified, the number of I / O (Input / Output) pins is saved and a CPU without a DRAM (Dynamic Random Access Memory) controller even can be used in a plurality of pieces of applications so as to fulfill the aim of saving the cost.

Description

technical field [0001] The invention relates to the field of an embedded operating system memory, in particular to a single-memory-based embedded device that can start a system in two startup modes, conventional and XIP. Background technique [0002] Embedded system is an application-centric, computer-based computer system with tailorable software and hardware, which meets the strict requirements of the application system on function, reliability, cost, volume, and power consumption. With the rapid development of embedded technology and semiconductor memory technology, consumers have put forward higher requirements for embedded products in terms of system size, startup speed, real-time operation, and power consumption. Therefore, simplifying the boot process of embedded operating systems, shortening the boot time, and reducing system power consumption are of great significance to winning the market position of embedded products. [0003] An embedded system can be divided in...

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Problems solved by technology

[0009] After experimental research, the inventors found that the main reason for the slow startup of the embedded system is: figure 2 As shown in the conventional startup mode of the traditional embedded device shown, when the embedded system starts, a lot of time is spent in the copy decompression process from the NAND Flash memory 15 to the volatile DRAM16 kernel image, and the kernel loads It takes a long time to decompress, mount, copy and decompress the root file system of the file system in the file system

At the same time, conventional embedded systems use mixed types of memory to build embedded storage systems. Mixed types of memory systems have certain limitations when used, and the management and control of storage systems are also relatively complicated.

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