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Startup access method of embedded system and storage device

A technology for embedded systems and storage devices, applied in program control devices, computer security devices, program loading/starting, etc., and can solve problems such as data and/or program destruction

Inactive Publication Date: 2012-05-16
ASUSTEK COMPUTER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] To sum up, the boot access method and storage device proposed by the present invention not only improve the problem that the data and / or programs in the master boot record area and the public area are easily damaged when the embedded memory is used in the prior art, And the use of embedded memory can still take into account the compatibility with the existing technology, further allowing embedded products to use more flexible and secure data reading methods when using embedded memory to make the use of memory segments play a better role

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  • Startup access method of embedded system and storage device
  • Startup access method of embedded system and storage device
  • Startup access method of embedded system and storage device

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Embodiment Construction

[0015] In order to improve the problems caused by the planning of the memory segments of various types of embedded memories in the prior art, so that when the embedded system uses the embedded memory, there is no need to worry about the stored program or data being damaged, so that the embedded product cannot run normally The problem.

[0016] See figure 1 , which is a schematic diagram of a memory segment planned based on the idea of ​​the present invention. From an overview, the memory segments of the embedded memory (that is, the storage device) are roughly divided into three types, and the three types of memory segments are: the master boot record area 11 , the hidden area 13 and the public area 15 . Wherein the start address of the master boot record area 11 is located at the first address of the storage device, so the start address of the master boot record area 11 is planned at 0x00000000 in the icon; and the start address of the hidden area 13 is located at the storag...

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Abstract

The invention discloses a startup access method of an embedded system and a storage device. The startup access method of an embedded system is applied to the storage device comprising a master boot record(MBR) area, a hidden area and an open area for improving the validity of data reading of an embedded memory. The access method comprises the following steps of: when receiving normal startup, directly accessing the data in the open area by the MBR area; and when receiving triggered update, updating the MBR area by a boot loader of the hidden area first, and then accessing the data in the open area.

Description

technical field [0001] The invention relates to a start-up access method and a storage device of an embedded system, in particular to an access method and a storage device for updating a master boot record area. Background technique [0002] As far as the way of storing data / programs inside the embedded memory is concerned, embedded secure digital card (Embedded Secure Digital, hereinafter referred to as eSD) and embedded multimedia card (embedded Multi Media Card, hereinafter referred to as eMMC) types of embedded memory The content stored in the memory is planned by using a master boot record area (MBR for short), and the master boot record area is stored in the first 512 bytes of the memory address of the storage device. Among the 512 bytes, 446 bytes are used to store the program, and the other 64 bytes are used to store the partition table. The purpose of the partition table is to store the size and The starting location, so system programs can access the contents of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/445G06F11/14
CPCG06F9/4408G06F21/575G06F8/65G06F9/4401
Inventor 江明松李泳德叶礼彬詹丰吉柯文证
Owner ASUSTEK COMPUTER INC