System chip with hot plug function and PCI-E root port controller thereof

Abstract

The invention relates to a system chip with a hot plug function and a PCI-E root port controller thereof. The PCI-E root port controller comprises a special system management bus controller and a micro control unit, wherein the special system management bus controller is used for being electrically coupled with a plurality of I / O expansion chips through a special system management bus; after the micro control unit obtains information of the I / O expansion chip to be accessed by a basic input / output system of a computer device through the PCI-E root port, the system management bus address of the I / O expansion chip to be accessed is found from a reference table according to the obtained information; the special system management bus controller can be controlled to access the corresponding I / O expansion chip according to the found system management bus address; the obtained relevant information is stored into a corresponding register, so that the basic input / output system can directly access the corresponding register through the PCI-E root port controller.

Description

technical field [0001] The invention relates to the field of PCI-E hot-swapping technology, in particular to a system chip with a hot-swapping function and a PCI-E root port controller thereof. Background technique [0002] figure 1 A system-on-chip (SoC) with hot-plugging function is depicted, which is suitable for a computer device (not shown) installed with a Basic Input / Output System (BIOS). exist figure 1 Among them, the system chip 100 includes a PCI-E root port (PCI-E Root Ports) controller 110 and a general system management bus (System Management Bus, SMBus) controller 120. The general system management bus controller 120 is electrically coupled to a plurality of I / O extension chips 140 through the general system management bus 130 (the English translation of the I / O expansion chip is I / O Extender), and each I / O The expansion chip 140 is electrically coupled to a plurality of expansion slots 150 . [0003] The Universal System Management Bus Controller 120 and t...

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Problems solved by technology

[0005] However, when there is a problem with the expansion device on a certain expansion slot 150, the user must sequentially set the general system management bus address of the I / O expansion chip 140 to be accessed through the basic input / output system. The system management bus controller 120 visits these I / O expansion chips 140 respectively to find out which expansion device on the expansion slot 150 has a problem. Setting the general system management bus address of the I / O expansion chip 140 to be accessed in the basic input / output system, thus wasting a lot of time

At the same time, the configuration process of the general system management bus 130 also takes a lot of time

[0006] In addition, since the general system management bus controller 120 of the system chip 100 is used to realize the hot swap function, when accessing the I / O expansion chip 140 connected to the general system management bus 130, the basic input The / output system operates the general system management bus 130, so the software implementation part is relatively complicated

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