Method for avoiding functional abnormalities of PCIE devices caused by address space allocation

Abstract

The present invention discloses a method for avoiding functional abnormalities of PCIE devices caused by address space allocation. The method comprises the following steps that: S1, in the Legacy mode, a PCIE device describes the required address space in the BAR, and the BIOS constructs an address map for the address space required for the PCIE device, wherein the address map is used to describe the allocation of system resources, and allocate the address space for each PCIE device; and S2, when the system detects that the PCIE device is a network card, an HBA card or other PCIE devices, the system is forced to close the Above 4G. According to the method disclosed by the present invention, when the system detects that there is a network card, an HBA card or other PCIE devices, the address space of the device can be allocated to 32 bits, so that functional abnormalities caused by that the address space allocation exceeds the 32 bits due to the Above 4G opening in the BIOS option are avoided.

Description

technical field [0001] The invention relates to the technical field of server firmware, in particular to a method for preventing PCIE devices from functioning abnormally due to address space allocation. Background technique [0002] PXE (preboot execute environment, pre-boot execution environment) is the latest technology developed by Intel Corporation. It works in the Client / Server network mode, supports workstations to download images from remote servers through the network, and thus supports booting the operating system through the network. During the startup process, the terminal requires the server to assign an IP address, and then uses TFTP (trivial file transfer protocol) or MTFTP (multicast trivial file transfer protocol) protocol to download a startup software package to the local memory for execution, and the startup software package completes the terminal basic software settings to boot the terminal operating system pre-installed in the server. [0003] The PXE f...

AI Technical Summary

Problems solved by technology

[0003] The PXE function is a convenient way to fill OS. The efficiency of batch filling OS is very high. However, due to the rapid development of computer technology and the complexity and diversity of functions of various devices, it is often required that the address space allocated by the system exceeds 32 bit to meet the allocation of resources, and the Above 4G in the BIOS option is turned on, but the PXE function of the device may be abnormal at this time, making it unusable

When using some Intel network cards, when PXE is used, it is found that an error will be reported, so that PXE fails. After checking the corresponding document, it is found that such an error report may be caused by the opening of Above 4G. However, opening Above 4G It is a trend. Many devices require this option to be enabled, such as GPU, VCA card, etc., but some devices do not support it, such as some network cards and HBA cards and other PCIE devices, so if you enable Above 4G by default, errors may occur