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Method and device for starting boot program and CPU

A program and program storage technology, applied in the field of boot program, can solve the problems of high cost, slow reading and writing speed of serialflash, slow boot program speed, etc.

Inactive Publication Date: 2014-12-24
BEIJING CYCLE CENTURY DIGITAL TECH
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Problems solved by technology

[0004] However, the inventor found in the research process of this application that due to the high price of nor flash, and the price increases with the increase of capacity, when the first method is used to start the boot program, the required cost is relatively high; When starting the boot program in this way, the speed of starting the boot program is slow due to the slow reading and writing speed of the serial flash

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  • Method and device for starting boot program and CPU
  • Method and device for starting boot program and CPU
  • Method and device for starting boot program and CPU

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] In order to solve the problems of high cost in the first method and slow startup speed in the second method in the prior art when starting the boot program, the present invention discloses a method for starting the boot program. Wherein, the boot program is stored in nand flash, and the central processing unit CPU is provided with a mini boot program for reading the boot program. see figure 1 As shown in the schematic diagram of the workflow, the method for...

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Abstract

The invention relates to the field of electronic communication and discloses a method and device for starting a boot program and a CPU. The method for starting the boot program comprises the steps that the boot program is pre-stored in the nand flash, and a mini boot program used for reading the boot program is set in the central processing unit (CPU), wherein information stored in the nand flash can be read through the mini boot program. According to the method and device for starting the boot program and the CPU, the boot program stored in the nand flash is read firstly according to the mini boot program, the read boot program is stored in a corresponding storage space of the CPU, and the stored boot program is started through the CPU. The cost of the nand flash is low, the reading speed is high, and thus the problems that in the prior art, cost is high and the starting speed is low when the boot program is started are solved.

Description

technical field [0001] The invention relates to the field of electronic communication, in particular to a method, a device and a CPU for starting a boot program. Background technique [0002] Currently commonly used flash (memory), that is, flash memory mainly includes three types: serial flash (serial flash memory), nor flash (parallel flash memory) and nand flash (data storage flash memory). These three kinds of flash have their own characteristics. Among them, nor flash stores data stably and reads and writes at a moderate speed, but its price increases with the increase of capacity, and the price is more expensive; serial flash stores data stable and has a lower price, but reads and writes The speed is slow, about 1 / 6 of that of nand flash; the reading and writing speed of nand flash is fast, but it does not support CPU (Central Processing Unit, central processing unit) direct access to its address space. In an embedded system, if a user triggers a certain application p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/445
Inventor 陈明塑
Owner BEIJING CYCLE CENTURY DIGITAL TECH
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