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Realization method and apparatus of FLASH integrate BOOTROM

An implementation method and address space technology, applied in the field of communication, can solve problems such as many chips, inability to upgrade online, complex circuit design, etc., and achieve the effect of reducing cost, reducing usage, and simple system design

Active Publication Date: 2010-06-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the process of realizing the present invention, the inventor found that the prior art has at least the following disadvantages: the circuit design is complicated, the chips used are more, the cost is high, it is not conducive to reducing the area of ​​the single board, and the BOOTROM program upgrade is inconvenient and cannot be upgraded online

Method used

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  • Realization method and apparatus of FLASH integrate BOOTROM
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  • Realization method and apparatus of FLASH integrate BOOTROM

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Embodiment Construction

[0016] The embodiment of the present invention provides a method for realizing FLASH integrated BOOTROM. The embodiment of the present invention removes the independent BOOTROM chip and stores the BOOTROM program in the address space of FLASH, which makes the system design simple, reduces the usage of the chip, and reduces the cost. It also provides write protection for the BOOTROM program to ensure that the BOOTROM program will not be rewritten under normal conditions, and the write protection of the BOOTROM program can be released within a predetermined time by software to realize online upgrade of the BOOTROM program.

[0017] Such as image 3 As shown, it is a flow chart of the implementation method of FLASH integrated BOOTROM in the embodiment of the present invention, which specifically includes the following steps:

[0018] Step S301, storing the BOOTROM program in the address space of the FLASH. The embodiment of the present invention cancels the dedicated BOOTROM pr...

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Abstract

The invention embodiment discloses a realizing method for a flash memorizer FLASH integration starting Read Only Memory BOOTROM, which comprises the following steps: the BOOTROM procedure is stored inthe address room of FLASH; an address line of a central processing unit (CPU) after address coding is connected with the FLASH to lead the address room of FLASH and the address room visited by CPU togenerate different address mapping. The invention stores the BOOTROM procedure in the address room of FLASH to facilitate the address room of FLASH and the address room visited by CPU to generate different address mapping through the address coding, thereby simplifying the system design, reducing the usage amount of chip, reducing cost, relieving write-protect to BOOTROM procedure in the prearranged time and realizing the online upgrade of BOOTROM procedure.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for realizing FLASH integrated BOOTROM. Background technique [0002] The commonly used program access technology on the single board is to use one or two small FLASH (Flash memory, flash memory) or ROM (Read Only Memory, read-only memory) on the single board as the BOOTROM (Boot Read Only Memory, boot read-only memory) program storage space, to store the boot program of the system, and usually write-protect the memory chip to ensure that the boot program will not be rewritten and cause the system to fail to start. At the same time, another piece of FLASH with a large storage capacity is used as the main program access area of ​​the system. This storage space is generally rewritable, so that the program can be upgraded normally or the configuration parameters can be changed. [0003] Such as figure 1 As shown, it is a schematic diagram of a CPU (Centr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/445
Inventor 章琳
Owner HUAWEI TECH CO LTD