KR0171773B1 - Terminal controller - Google Patents

Abstract

The present invention relates to a method for setting a configuration of a terminal controller in a high speed medium computer, comprising: booting a system (S11); Initializing the rhp driver of the input / output controller (S12); Downloading configuration information of the cluster of the terminal controller (S13); Reconfiguring the downloaded configuration information to be used by the kernel (S14); Initializing the hty driver with the reconfigured configuration information (S15); downloading the downloading module via rhp (S16); generating a tty device file (S17); And step S18 of using the terminal. Therefore, it is possible to save time according to configuration settings, to be convenient to use, and to prevent an accident due to inexperienced management of a system administrator.

Description

Configuration Method of Terminal Controller in High Speed Medium Computers

1 is a block diagram showing a high speed medium computer.

2 is a flowchart showing a step of setting a configuration of a terminal controller according to a conventional method.

3 is a flowchart illustrating the steps of setting up a configuration of a terminal controller according to the present invention.

* Explanation of symbols for main parts of the drawings

1: System bus 2-1, 2-2: I / O bus

3, 20: processor board 4: memory board

5: I / O control board 6: system control board

7: X.25 controller 8: ISDN controller

9: Ethernet Controller 10: FDDI Controller

11: terminal controller 12: hard disk

13: disc array 14: cartridge tape

15: optical disc

The present invention relates to a terminal controller for connecting a plurality of terminals in a high speed medium computer, and more particularly, a method for configuring a terminal controller for informing the kernel how a cluster is configured to connect a port to the terminal controller. It is about.

In general, as shown in FIG. 1, a multiprocessor system includes a plurality of processor boards (MPU) 3, a memory board 4, an input / output board (IPU) 5, and system control on a common system bus 1. Board (SCM) 6 is connected and configured to exchange data. In addition, the device boards are connected to the I / O control boards 5 and 6 via an I / O bus (for example, a SCSI bus or a VME bus) to request processing from the processor board 3 through the I / O board, or the processor board 3 controls the I / O. It is arranged to carry out the command indicated through the board 5.

For example, in a high-speed medium-size computer, the system bus 1 is a HiPi ⁺ bus which is a backplane bus that serves as an information communication path and is a HiPi bus which is a system bus of the main computer II. It is a main board that carries the operating system and user's program, and is a tightly coupled multiprocessor which can be extended up to 10 boards on the shared bus. Based on DRAM, it can have 256M of memory per board and up to eight cards can be mounted on a shared bus. In addition, the input / output control board 5 is a board that is responsible for processing and passage role for efficiently processing data transfer between a large-capacity device such as a disk and a tape and a main memory, and a device for controlling a block input / output device. It has ROM and local RAM for storage, has a large buffer for temporary storage of transmission data, expands to 4 boards on shared system bus, and provides 4 SCSI-2 bus interfaces for block I / O devices. do. The block I / O devices that can be connected to the SCSI-2 bus here are storage devices such as a hard disk 12, a disk array 13, a cartridge tape 14, an optical disk 15, and the like.

In addition, the system control board 6 is responsible for processing and passage for efficiently processing data transmission between character input / output processing devices such as consoles, terminals, printers, communication devices such as LAN, WAN, and ISDN, and main memory devices. In addition, it has ROM and local RAM that can embed device driver for control of text and communication input / output devices. It also has TODC and battery backup RAM as system-wide resources. Up to two such system control boards 6 can be mounted on a shared system bus and provide a VME64 bus interface for connection to text and communication input / output devices. The character input / output and communication devices that can be connected to the VME64 bus are X.25 controller 7, ISDN controller 8, Ethernet controller 9, FDDI controller 10, terminal controller 11, and the like. The I / O control board and the system control board can be implemented on the same board in hardware, and can be selected as an option to perform a specific function.

In this configuration, the terminal controller connected to the system control board via the I / O bus uses the MVME 336 board in the conventional main computer 2, but uses the HPS 6245-25 board in the high speed medium computer.

In addition, the HPS 6245-25 board can be configured with various clocksters that provide 16, 17, 32, and 33 ports, providing up to 255 ports on a single board to provide more than 1024 ports. Information about the structure of the cluster is required.

As described above, a conventional method of configuring a computer system upon system setup according to the structure information of a cluster may include booting the system (S1); initializing the rhp driver (S2); Initializing the hty driver with configuration information in the kernel (S3); downloading the downloading module via rhp (S4); It consists of a step (S5) using a tty.

For example, once a computer system is in place, the kernel already has information about the current cluster of terminal controllers. If one cluster is added, the system administrator must first modify the cluster configuration information file. The cluster configuration information is obtained from the modified configuration information file in this way, and a utility for generating the necessary c source file is executed. Then we compile the c source file created by the utility to get the object file, rebuild the kernel, and reboot. From this point on, the cluster configuration information is modified to operate according to system operation. If the configuration information needs to be modified, the above steps should be performed again. After the system is booted as described above, the rhp driver is initialized (S2), and the hty driver is initialized with the configuration information in the kernel (S3). Subsequently, the downloading module is downloaded via rhp, and thus ttys are used (S4 and S5).

However, in the conventional HPS 6245-25 device driver, the kernel must be recreated after the configuration information of the connected cluster is created. Therefore, if the cluster identifier is changed, the cluster order is changed, or one is missing or added, the kernel must be rebuilt. . Rebuilding the kernel is a very time-consuming task, and in some cases a dangerous operation that makes the system unstable.

Accordingly, the present invention has been made to solve the above problems, by providing the configuration information of the cluster after the boot of the system configuration configuration method of the terminal controller to prevent the inconvenience of rebuilding the kernel even in the minor configuration changes The purpose is to provide.

In order to achieve the above object, in the method of the present invention, a processor, a shared memory, and an input / output control board are commonly connected to a system bus, and at least one terminal controller is connected to the input / output board through an input / output bus. A processor system, comprising: booting a system; Initializing the rhp driver of the input / output controller; Downloading configuration information of a cluster of terminal controllers; Reconfiguring the downloaded configuration information for use by the kernel; Initializing the hty driver with the reconfigured configuration information; downloading the downloading module via rhp; And generating a tty device file.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

First, in order to make the present invention easier to understand, a brief description will be given of a message transfer protocol which is an information transfer protocol between processors. This message transfer protocol is intended to be interrupted between processors by interrupts.

That is, the MPP is a function for receiving an input / output request of a host and transmitting a result of the execution of the input / output request, and is used for communication between the host and the input / output module. The MPP performs message transmission in an interrupt manner by using a message queue existing on the shared memory of the CPU and the IOP.

In other words, because local resources in each processor board are not accessible to other processor boards through the system bus, MPP sets up the MPP structure in shared memory and notifies the request and service as interrupts. , I / O controller, system controller, etc.). As such, the processor board using the MPP includes a processor board, a system control board, and an input / output control board. At some moment, a request processor and a service processor exist. When the requesting processor constructs a message containing its request and notifies the service processor interrupt through the channel of the destination slot, the service processor receives the message from the requesting processor and performs the service as indicated by the content of the received message. After completion, one MPP cycle is terminated by notifying the request processor with an interrupt.

In the basic structure of the MPP, a channel head corresponding to a processor slot on a system bus and a request channel and a service channel, which provide a path for the processor itself to operate as an RP or an SP, are formed as a message connection structure.

The channel head is an information table mapped to a unique slot of each processor board connected to the system bus, and maintains a request channel and a service channel. Here, the channel serves as a communication line between boards as a unidirectional connection structure. In addition, the message contains contents for accurately delivering the request contents to the service processor, and a packet containing contents for instructing the service processor is included in the message. A message is a communication medium that is logically transmitted with each packet during each processing period, and can be communicated with a service processor by being allocated from a pool available to the requesting processor.

When the message is transmitted using the MPP, the request and the service completion are performed differently.

In the case of a request, a source slot connects a message to a request channel of a destination slot, and then a message is transmitted by sending an interrupt to the destination slot. A message is sent as a completion or other matter. A message is transmitted because an interrupt is transmitted to a raw slot connecting a message to a service channel of a raw slot.

The terminal controller (for example, HPS 6245-25) to which the present invention can be applied can attach up to 255 various clusters providing 16, 17, 32, 33 ports to one board to provide more than 1024 ports, and stream The driver facilitates the development of the device driver.

These device drivers are divided into raw and stream drivers. Raw drivers are called 'rhp' and control the board by downloading the download module to the board, resetting the board, and getting information from the modes. It plays a role. The stream driver is called 'hty' and provides tty functionality.

In other words, the raw driver is a driver in which data used by a user is transmitted to the driver without any processing, and the streams driver is a driver in which data is processed in a form of a message and transmitted to the driver. Previously, the part was a raw driver, but since SVR4.0, the streams driver has been used a lot, and most of the devices use raw drivers to control devices, and streams drivers to transmit and receive data. The HPS6245 driver also uses a raw driver called rhp that controls the HPS6245 board and a streams driver called hty for sending and receiving data.

On the other hand, in the high speed medium-size computer to which the present invention is applied, a separate board dedicated to input / output is required, and a driver for an input / output controller and a driver for a processor board (MPU) are separately required. The driver in the MPU connects the driver of the user with the IPU. In other words, when the user uses the open of the dummy driver on the MPU, the user connects to the open of the real driver on the IPU, and the close connects to the close. At this time, the streams interface and the MPP interface are used to connect the dummy driver of the MPU and the real driver of the IPU. In other words, by using newiop as the IPU kernel, the main functions of rhp and hty are all present in the IPU, and only the dummy driver for connection with the driver in the IPU kernel exists in the MPU kernel.

At this time, since hty uses a stream, rhp does not provide a raw driver in newiop, because a stream is used, and a process of copying data received from a user is necessary.

On the other hand, in order to use a terminal using a terminal control device driver, information on the terminal configuration is required. According to the present invention, a method of configuring a terminal configuration includes booting a system as shown in FIG. ); Initializing the rhp driver of the input / output controller (S12); Downloading configuration information of the cluster of the terminal controller (S13); Reconfiguring the downloaded configuration information to be used by the kernel (S14); Initializing the reconfigured configuration information and the hty driver (S15); downloading the downloading module via rhp (S16); generating a tty device file (S17); And step S18 of using the terminal.

In other words, suppose that the system environment is in place, and one cluster is added. The system administrator modifies the cluster configuration information file and reboots. Modifications to the configuration information are passed to the kernel immediately after booting.

As described above, in resetting the cluster configuration of the terminal according to the present invention, after creating a C source program using a utility as in the prior art, compiling it and rewriting the kernel, only changing the configuration information file Therefore, it saves time according to configuration, is easy to use, and the system administrator can prevent accidents due to immature management.

Claims (1)

A multiprocessor system in which processors, a shared memory, and an input / output control board are commonly connected to a system bus, and at least one terminal controller is connected to the input / output board via an input / output bus, the system booting step (S11); Initializing the rhp driver of the input / output controller (S12); Downloading configuration information of the cluster of the terminal controller (S13); Reconfiguring the downloaded configuration information to be used by the kernel (S14); Initializing the hty driver with the reconfigured configuration information (S15); downloading the downloading module via rhp (S17); And a step (S17) of generating a tty device file.