Method allowing host and baseboard management controller to share device

Abstract

The invention provides a method allowing host and baseboard management controller to share device. An IO (Input / Output) sharing device is integrated in the baseboard management controller; a standard WishBone bus protocol is adopted among a plurality of devices, and interconnected communication of the devices is realized through a WishBone crossbar switch; the host accesses a sharing device through an uplink LPC bus of the baseboard management controller, an uplink LPC bus interface is communicated with the sharing device through a WishBone interface; an address space organization is executed, wherein the sharing device has two sets of independent access address spaces, the host and the baseboard management controller access the sharing device respectively by adopting different address spaces through an address space re-mapping mode; and compatible host access is executed, wherein the address of the sharing device is compatible with legacy IO, and partial non-legacy IO visible devices are accessed through a standard IPMI (Intelligent Platform Management Interface) protocol. On the premise of being compatible with an LPC bus specification, the LPC bus response is modified, the upper limit of delay tolerance is increased, and an overtime mechanism is provided to prevent the bus from being suspended.

Description

technical field [0001] The invention relates to the field of integrated design of server systems, in particular to the development of a server's baseboard management controller and the integrated design of a server's mainboard; more specifically, the invention relates to a method for sharing equipment between a host and a baseboard management controller. Background technique [0002] At present, the baseboard management controller (BMC) in commercial server systems on the market is mainly used for system management, and can realize various functions such as configuration management, device management, and performance monitoring according to different application configurations of the system. And some commonly used low-speed IOs, such as P / S2 interface, SPI interface, serial port, IIC interface, XBUS interface, fan control interface, power management interface, etc., are realized by dedicated SUPER IO chips on the market. [0003] With the development of servers, system funct...

AI Technical Summary

Problems solved by technology

To achieve functional enhancement under the premise of existing commercial chips, it is necessary to increase the number of chips in the mainboard. Realizing complex system integration in a limited space on the mainboard has made the design of the mainboard more and more difficult, and the design of the server mainboard is also facing new challenges. challenge

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