TW201433923A - System and method of debugging BMC UART - Google Patents

Abstract

The present invention provides a method of debugging BMC UART. It receives GPIO signals which Southbridge sends to virtual multiplex and judges whether the GPIO signal is the preset value. When the GPIO signal is the preset value, the first switching step switches the virtual multiplex to make the BMC UART link to the virtual UART. Otherwise, the second switching step switches the virtual multiplex to make the BMC UART link to the external UART. It also receives original equipment manufacturer OEM command from remote terminal and judges whether the OEM command is the preset value. When the OEM command is the preset value, do the first switching step. Otherwise, do the second switching step.

Description

Baseboard management controller serial port debugging system and method

The invention relates to a baseboard management controller (BMC) serial port debugging system and method.

The BMC is a controller located on the server board for monitoring and managing the resources of the server board. It has its own random memory RAM, read-only memory ROM, and its own embedded system. The BMC does not. The video graphics array (VGA) output is used like a host to debug and develop the BMC system. In the debugging and development process of BMC, the common practice in the industry is to bring out a PIN pin of a universal asynchronous receiving/transmitting device (UART) on the motherboard, and connect to the debugging host through a USB to UART adapter cable. Input and output. The UART is a parallel input that becomes a serial output chip, usually integrated on the motherboard. This has the disadvantage that when debugging development, not only a USB to UART patch cord, but also a host is required. In addition, debugging the BMC is inconvenient for the assembled server or the server that the user has already used.

In view of the above, it is necessary to provide a BMC serial port debugging system and method, which can enable a developer to conveniently diagnose a user's BMC system at a remote location.

A BMC serial port debugging system, the system comprising: a receiving module, configured to receive a general-purpose input/output GPIO control signal sent by a south bridge of a server system end to a multiplexer; and a determining module, configured to determine the GPIO control signal Whether the signal mode value is a preset value; the switching module 1 is configured to switch the multiplexer to connect the BMC serial port to the server system end when the signal mode value of the GPIO control signal is the preset value Connected to the virtual serial port of the BMC, the serial port is a serial port of the BMC running state input and output, and the serial port is connected to the virtual serial port through the multiplexer; When the signal mode value of the GPIO control signal is not the preset value, the switch multiplexer is configured to connect the serial port of the BMC to the external serial port of the BMC, and the serial port is multiplexed. The device is connected to the external serial port; the receiving module is further configured to receive an OEM command sent by the remote terminal to the BMC, where the remote terminal is connected to the server system through the network; The determining module is further configured to determine the remote end Whether the OEM command sent by the terminal is the preset value, when the OEM command sent by the remote terminal is the preset value, performing the switching step one, when the OEM command sent by the remote terminal is not the preset value , perform the switching step two.

A BMC serial port debugging method, the method comprising: receiving step one, receiving a general-purpose input/output GPIO control signal sent by a south bridge of a server system end to a multiplexer; determining step one, determining whether a signal mode value of the GPIO control signal is For the preset value; switching to step 1, when the signal mode value of the GPIO control signal is the preset value, switching the multiplexer to connect the serial port of the BMC to the virtual serial port connected to the server system end, The serial port is a serial port of the BMC operating state input and output, and the serial port is connected to the virtual serial port by a multiplexer; and in step 2, when the signal mode value of the GPIO control signal is not the At the preset value, the switching multiplexer connects the serial port of the BMC to the external serial port, and the serial port is connected to the external serial port through the multiplexer; receiving step 2, the receiving remote terminal sends the The original device manufacturer of the BMC orders the remote terminal to connect to the server system through the network; and in step 2, it is determined whether the OEM command sent by the remote terminal is the preset value. Remote terminal When the sent OEM command is the preset value, the switching step 1 is performed. When the OEM command sent by the remote terminal is not the preset value, the switching step 2 is performed.

Compared with the prior art, the BMC serial port debugging system can enable the server system end to quickly connect to the BMC serial port through the multiplexer, which can conveniently control the BMC serial port debugging. .

1. . . server

2. . . Server system side

3. . . BMC

20. . . South Bridge

twenty one. . . Network埠

30. . . Virtual serial port

32. . . Multiplexer

31. . . External serial port

33. . . Tandem

34. . . Baseboard management controller serial port debugging system

4. . . Remote terminal

340. . . Receiving module

341. . . Judging module

342. . . Switching module one

343. . . Switch module two

1 is a diagram showing an application environment of a BMC serial port debugging system of the present invention.

2 is a block diagram of a BMC serial port debugging system of the present invention.

3 is a flow chart of an embodiment of a BMC serial port debugging method of the present invention.

As shown in FIG. 1, it is an application environment diagram of the serial management system of the substrate management controller of the present invention. The baseboard management controller serial port debugging system 34 (hereinafter referred to as the BMC serial port debugging system 34) is applied to the server 1 to manage the serial port management controller (BMC) serial port debugging. The server 1 includes a server system end 2 and a BMC 3. The server system end 2 communicates with the BMC 3 through a low speed communication protocol LPC. The server system end 2 includes a south bridge (PCH) 20 and a network port 21. The server system end 2 can communicate with the remote terminal 4 through the network port 21. The BMC 3 further includes a multiplexer (VMUX, Virtual Multiplex) 32, a Virtual Universal Asynchronous Receiver Transmitter (VUART) 30, and a Universal Asynchronous Receiver Transmitter (UART) 33. And an external serial speaker (External Virtual Universal Asynchronous Receiver Transmitter, Ext UART) 31, the virtual serial port 30, the external serial port 31, and the serial port 33 and the multiplexer 32, respectively. Connected.

The south bridge 20 is connected to the multiplexer 32 through a general purpose input output (GPIO). When the BMC abnormally stops working and the remote control has failed, the south bridge 20 can be used to send its controlled GPIO control signal. The connection of the multiplexer to the serial port 33 and the external serial port 31 is reset, and the GPIO control signal is a signal for locally controlling the BMC serial port.

The multiplexer 32 is an integrated system that transmits multi-threaded information to the multiplexer 32 and the multiplexer has only one output. In this embodiment, the multiplexer 32 is configured to switch the serial connection between the multiplexer and the BMC and the connection to the external serial port 31.

The serial port 33 is a serial port of the BMC operating state input and output. The virtual serial port 30 is a serial port of the remote output of the BMC operating state. The virtual serial port 通信30 communicates with the server system end 2 through the LPC and receives the input control data of the server system end 2, and the virtual serial port 埠30 transmits the data of the operating state of the BMC to the server system end 2 The server system end 2 transmits the data of the running status of the BMC to the remote terminal 4 through the network port 21 and receives the input control data of the remote terminal 4 through the network port 21. The external serial port 31 is a serial port of the local output of the BMC operating state, which is used for locally debugging the BMC serial port.

The remote terminal 4 can be a desktop computer, a notebook computer, a tablet computer, or the like. The network can be the Internet, an intranet or other wireless network.

As shown in Figure 2, it is a module diagram of the BMC serial port debugging system. In this embodiment, the BMC serial port debugging system 34 includes a receiving module 340, a determining module 341, a switching module 342, and a switching module 343. The module referred to in the present invention refers to a series of computer programs that can be executed by a processor and can perform fixed functions, and are stored in a memory. In the present embodiment, the functions of the respective modules will be specifically described in the flowchart of FIG.

As shown in FIG. 3, it is a flowchart of a preferred embodiment of the BMC serial port debugging method of the present invention. The order of the steps in the flowchart may be changed according to different requirements, and some steps may be omitted.

In step S10, the BMC initializes the virtual serial port 30 communicating with the server system end 2 when the boot loader bootloader initiates initialization. At the same time, the serial port 33 of the BMC and its external serial port 埠31 are initialized, and the multiplexer 32 is initialized.

In step S11, the receiving module 340 receives the GPIO control signal sent by the south bridge 20 of the server system end 2 to the multiplexer 32.

In step S12, the determining module 341 determines whether the signal mode value of the GPIO control signal is a preset value, and the preset value may be 0 or 1. When the signal mode value of the GPIO control signal is a preset value, step S13 is performed; when the signal mode value of the GPIO control signal is not the preset value, step S14 is performed.

In step S13, the switching module 342 switches the multiplexer 32 to connect the serial port 33 of the BMC 3 to the virtual serial port 30, thereby connecting the serial port 33 to the server system end 2, so that the remote terminal 4 It can remotely control the serial port debugging of BMC 3.

In step S14, the switching module 343 switches the multiplexer 32 to connect the serial port 33 of the BMC 3 to the external serial port 31, so that the debugger can locally control the serial port debugging of the BMC 3.

In step S15, the receiving module 340 receives the preset original equipment manufacturer OEM command sent by the remote terminal 4 to the BMC 3. The OEM command is a command sent by the remote terminal 4 for controlling the serial port 33 of the BMC 3 to be connected to the virtual serial port 30 or the external serial port 31.

In step S16, the determining module 341 determines whether the OEM command sent by the remote terminal 4 is the preset value. When the OEM command sent by the remote terminal 4 is the preset value, step S17 is performed, and when the OEM command sent by the remote terminal 4 is not the preset value, step S18 is performed.

In step S17, the switching module 342 switches the multiplexer 32 to connect the serial port 33 of the BMC 3 and the server system end 2 to the virtual serial port , 30, so that the remote terminal 4 can remotely control the serial of the BMC 3.埠 Debugging.

In step S18, the switching module 343 switches the multiplexer 32 to connect the serial port 33 of the BMC 3 to the external serial port 31, so that the debugger can locally control the serial port debugging of the BMC 3.

Steps S15, S16, S17, and S18 are repeatedly executed to control the serial port debugging of the BMC until the debugging is stopped. Through the invention, the server system end 2 is quickly connected to the debugging serial port of the BMC, which can conveniently control the BMC serial port remotely, diagnose the user's BMC system, and facilitate the development of the tester's system development, Debugging and testing.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention and are not intended to be limiting, and the present invention will be described in detail with reference to the preferred embodiments. Modifications or equivalents are made without departing from the spirit and scope of the invention.

34. . . Baseboard management controller serial port debugging system

340. . . Receiving module

341. . . Judging module

342. . . Switching module one

343. . . Switch module two

Claims (6)

A substrate management controller serial debugging system, the system comprising:
a receiving module, configured to receive a general-purpose input and output GPIO control signal sent by the south bridge of the server system end to the multiplexer;
a determining module, configured to determine whether a signal mode value of the GPIO control signal is a preset value;
The switching module is configured to: when the signal mode value of the GPIO control signal is the preset value, switch the multiplexer to connect the serial port of the BMC to the virtual serial port of the BMC connected to the server system end. The serial port is a serial port of the BMC running state input and output, and the serial port is connected to the virtual serial port through the multiplexer;
The switching module 2 is configured to switch the multiplexer to connect the serial port of the BMC to the external serial port 埠Ext UART of the BMC when the signal mode value of the GPIO control signal is not the preset value, The serial port is connected to the external serial port through the multiplexer;
The receiving module is further configured to receive an original device manufacturer OEM command sent by the remote terminal to the BMC, where the remote terminal is connected to the server system end through a network port;
The determining module is further configured to determine whether the OEM command sent by the remote terminal is the preset value, and when the OEM command sent by the remote terminal is the preset value, performing a switching module When the OEM command sent by the remote terminal is not the preset value, the switching module 2 is executed. According to the substrate management controller of the patent application scope 1 in the serial debugging system, when the BMC abnormally stops running, the GPIO control signal is sent to the BMC multiplexer through the south bridge of the server system to reset the BMC serial. Connect with the external serial port and the multiplexer. According to the substrate management controller of claim 1, the external serial port is used for locally debugging the BMC serial port, and the virtual serial port is used for transmitting the data of the BMC running state to The control data transmitted from the server system end and the receiving server system end. A substrate management controller serial port debugging method, the method comprising:
Receiving step one, receiving a general-purpose input/output GPIO control signal sent by the south bridge of the server system end to the multiplexer;
Determining step one, determining whether the signal mode value of the GPIO control signal is a preset value;
Switching to step 1, when the signal mode value of the GPIO control signal is the preset value, switching the multiplexer to connect the serial port of the BMC to the virtual serial port connected to the server system end, the serial port 埠A serial port of input and output of the BMC operating state, the serial port is connected to the virtual serial port by a multiplexer;
In step 2, when the signal mode value of the GPIO control signal is not the preset value, the switching multiplexer connects the serial port of the BMC to the external serial port, and the serial port is transmitted through the multiplexer. External serial ports are connected;
Receiving step 2, receiving an original equipment manufacturer OEM command sent by the remote terminal to the BMC, where the remote terminal is connected to the server system end through the network;
In step 2, it is determined whether the OEM command sent by the remote terminal is the preset value, and when the OEM command sent by the remote terminal is the preset value, performing the switching step one, when the remote terminal sends the OEM When the command is not the preset value, the switching step 2 is performed. According to the serial management and debugging method of the substrate management controller in the fourth application patent, when the BMC abnormally stops running, the GPIO control signal is sent to the BMC multiplexer through the south bridge of the server system to reset the BMC serial. Connect with the external serial port and the multiplexer. According to the substrate management controller serial port debugging method of claim 4, the external serial port is used for locally debugging the BMC serial port, and the virtual serial port is used to transmit the data of the BMC running state to The control data transmitted from the server system end and the receiving server system end.