JPH03260858A - Processor for information processing system - Google Patents

Abstract

PURPOSE:To improve the repeatability of products by selecting easily and flex ibly the initial value of a central processor and the prescribed values of a func tion and a system constitution via an external input setting circuit. CONSTITUTION:The optional value that can be read by a central processor PU is set by an external input setting means 1 and then read by the PU. Thus the address of a nonvolatile read-only memory ROM is calculated. Based on this address, the data are transferred to a constitution register group SYG from the ROM and written there. When the data are written into the group SYG, the rewrite is protected for the group SYG. As a result, the board of the same PU can be applied to a system of a wide range and the repeatability of products is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a processing device that can be initialized in an information processing system.

(Prior Art) In recent years, central processing units for information processing systems have become highly integrated due to rapid advances in component technology. Central processing units for information processing systems in relatively small-scale areas have come to be comprised of several LSIs (Large Scale Integrated Circuits) and several printed circuit boards, and have become extremely compact. And this central processing unit board (
Various efforts have been made to make printed circuit boards (on which LSIs are mounted) applicable to a wide variety of systems. For example, a personal computer, which is a typical example of a small processing device, has a day switch on the outside of the housing to change the settings of the computer's functions. can be set. Parameter settings are generally performed when the central processing unit is reset, and one of the parameters is selected depending on the value of the dip switch. Further, the settings of specific parameters may be stored as data on memory, and by rewriting this data, it can be applied to various systems.

The method described above is a very effective means for small processing devices used for office purposes, such as personal computers.

On the other hand, higher integration of elements due to advances in component technology is also being achieved in fields such as processing equipment that require higher speeds.

That is, even in fields such as telephone exchange, communication processing, or information processing that require highly reliable, real-time processing and require a high-speed central processing unit, the size of the central processing unit board is becoming smaller.

By the way, in order to maintain high reliability in such telephone exchange, communication processing, and information processing systems, there are many examples of system configurations in which the central processing unit has a redundant configuration, such as having a spare central processing unit.

Furthermore, in order to ensure performance over a wide range or to achieve economy, a multiprocessor configuration is often adopted in which the central processing unit can be expanded according to the system scale.

FIG. 4 shows an example of the configuration of an information processing system of a telephone exchange having a multiprocessor configuration. In Figure 4, the signal processing bag! The fsGP is a central processing unit that has a function of detecting a call from a telephone subscriber, receiving numbers such as the telephone number of the other party through the network NW, and notifying the call processing device GNP of such information. This signal processing device SG
P has a duplex redundant configuration corresponding to the network NW, and is expanded together with the network NW. The call processing device GNP has the function of receiving various data from any signal processing device SGP, searching for a connection destination based on the type of caller's telephone and the received number, and setting a connection route for the network NW. It is a central processing unit. Call processing device CN
The device configuration of P is single-layered, but the call processing device CNP has an N+1 redundant configuration as a whole, and the signal processing device SGP
The load is distributed, and the number of units is increased according to the processing capacity. The common memory CM is a memory that stores common resources such as vacant and blocked routes of the network NW. Maintenance processing bag fi! The SVP is a central processing unit that performs overall maintenance of processing system equipment and switching equipment, and is capable of blocking and switching malfunctioning processing equipment and networks, as well as performing special processing such as testing and diagnosis.

(Problem to be Solved by the Invention) However, these various types of central processing units have traditionally been realized using individual parts, so each type of central processing unit has had its own problems from the viewpoint of performance and economy, as well as due to differences in the configuration of the devices. Different central processing units were applied. However, as mentioned above, as high integration and high performance have been achieved due to rapid advances in component technology in recent years, it has become possible to miniaturize each device, and it has become possible to configure a central processing unit with several boards. Became. As a result, it has become more economical to use the same central processing unit in order to improve the repeatability of central processing unit products.

In this way, it has become necessary to apply standard central processing unit boards to various systems, and one possible solution to this problem is to configure them using an external dip switch, as in the case of the personal computer mentioned above. However, this method has the problem of lack of future extensibility because parameters are directly specified by switch values. For example, in FIG. 4, the three central processing units, the signal processing unit SGP, the call processing unit GNP, and the maintenance processing unit SVP, have the following differences.

(1) Single and duplex device configurations The signal processing device SGP and the maintenance processing device svp are duplex, and the call processing device GNP is single.

In a redundant system, a control mechanism for a standby central processing unit and a system switching control mechanism are required.

(2) Privileged commands that can control other central processing units Since the maintenance processing device SvP tests and diagnoses the call processing device CNP, etc., it is necessary to have privileged commands that can control other central processing units.

(3) Difference in timer value The value of the timer provided inside each central processing unit is different for each device.

(4) Difference in access monitoring time The signal processing device SGP, call processing device fGNP, or maintenance processing device SVP has different monitoring times for access to input/output devices and memory.

As described above, the number of parameters is extremely large, such as the need to set each timer value of the timer circuit for the monitoring timer using parameters, and it is difficult to set them directly using a dip switch.

Furthermore, the method of setting and rewriting parameters in memory has the drawback that it is not reliable enough, as there is a possibility that data may be destroyed by the program.

It is an object of the present invention to solve the above-mentioned drawbacks of the prior art, and its purpose is to easily and flexibly set the initial values of the central processing unit and the specified values of functions and system configuration using an external input setting circuit. It is an object of the present invention to provide a processing device for an information processing system, which allows the same central processing unit board to be applied to a wide variety of systems, and which can improve product stability.

[Structure of the invention]

(Means for solving problems) A configuration of the present invention that achieves the above object is shown in FIG.

The present invention includes a central processing unit Pu, a non-volatile read-only memory ROM connected to the central processing unit PU and holding information defining initial values, configurations, and functions of the central processing unit 1FPU, and a central processing unit fPU. External input setting means for externally setting an arbitrary value that can be read by a central processing unit tPυ, the processing device of an information processing system having an initial value and a configuration register group SYG that defines functions and configurations. 1, address calculation means 2 for calculating an address in the non-volatile read-only memory ROM according to the value input to the external input setting means 1, and address calculation means 2 for calculating an address in the non-volatile read-only memory ROM according to the calculated address. data writing means 3 for writing data into the configuration register group SYG, and rewriting protection means 4 for protecting the configuration register group SYG from being rewritten when data writing to the configuration register group SYG is completed. It is characterized by

(Function) According to the processing device of the information processing system of the present invention, a predetermined value is set by the input means from outside the central processing device,
This value is read by the central processing unit to calculate an address in non-volatile read-only memory. and,
Data in the read-only memory is transferred and written to the configuration register group according to the calculated address. When writing to the configuration register group is completed, the configuration register group is protected from being rewritten. As a result, in the information processing system, the processing device is equipped with a desired function according to the human power value from the external input means.

(Example) Hereinafter, the present invention will be described in detail by way of example with reference to the drawings.

FIG. 2 shows a detailed diagram of one embodiment of the internal structure of each central processing unit such as the signal processing device 1isGP, the call processing device CNP, and the maintenance processing device sVP shown in FIG. In the figure, PU is a processor unit, S
YG is a group of configuration registers, ROM is a nonvolatile read-only memory, and PSIG is a group of system configuration registers SYG.
SW, a signal line that transmits a write protection signal to protect
is an externally attached input setting circuit that can be read by the processor unit PU, and in this embodiment, a switch is explained as an example. Further, PM is a memory in which various programs are stored.

In FIG. 2, data defining the initial values, functions and configuration of the central processing unit are stored in a non-volatile read-only memory ROM. The non-volatile read-only memory ROM contains a data group (PI, P2...Pi,...) that defines the initial values and configuration of the central processing unit.
・Pn) is stored in each system, and the external non-volatile read-only memory RO can be connected using the switch SW.
The first storage address of the data group stored in M is shown. That is, the start address of the data in the nonvolatile read-only memory ROM, which defines the initial values, functions, and configuration of the central processing unit, can be specified by operating the external switch SW.

In this case, the operation of the external switch SW is valid when the central processing unit is powered off or in a stopped state. This is because starting up the central processing unit from this state means starting a hardware reset such as turning on the power. By the reset operation, the central processing unit generates a reset interrupt to the processor unit PU after initializing the hardware, and the program is started. Here, the program started initializes the central processing unit,
and an initial program for defining functions and configurations. Note that even if the initial program is written in a non-volatile read-only memory ROM,
It may be stored on the program memory PM. Further, by the hardware reset operation, the signal line PSIG that protects the configuration register group SYG from being rewritten is turned on, and writing to the configuration register group SYG is permitted.

Next, the procedure of this initial program will be explained using the flowchart shown in FIG. In step 301, the program unit PU reads the value of the external switch SW. When the reading of the value of the external switch SW is completed, the program unit PU calculates the address of the nonvolatile read-only memory ROM in step 302. Then, in step 303, the program unit PU stores a non-volatile read-only memory ROM.
The contents of are sequentially written to the configuration register group SYG.

As a result, the initial values of the central processing unit, its functions, and the configuration of the system are defined.

In step 304, the program unit PU determines whether the contents of the nonvolatile read-only memory ROM have been written to all of the configuration register group SYG. If not (NO), the program returns to step 303. Continue writing, and if all are written (YES)
) proceeds to step 305.

In step 305, the signal on the signal line PSIG is turned off to prohibit writing to the configuration register group SYG.

Thereafter, the program unit PU takes over the general program in step 306, thereby completing the initial setting process. After this procedure, the configuration register group SYG
is in a write-protected state, making it impossible for general programs to write to it, and the central processing unit enters a stable operating state.

In this embodiment, a method has been described in which writing from a nonvolatile read-only memory ROM to the configuration register group SYG of the processor unit PU is realized by the program of the processor unit PU. Note that even in the case of a redundant central processing unit, the operations described in this description can be easily realized by having both central processing units execute the operation.

Further, it is also possible to prepare a microprogram circuit separate from the processor unit PU and implement it using a microprogram. Further, although an example has been shown in which the signal line PS1G is turned off by the initial program, it is also possible to provide a time limit circuit using hardware and turn off the signal line PS1G after a certain period of time has elapsed after the initial program is started.

〔Effect of the invention〕

As explained above, the present invention enables the initial values of the central processing unit and the specified values of the functions and system configuration to be easily and flexibly selected using an external input setting circuit. The device board can be applied to a wide range of systems, and has the effect of increasing product repeatability.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a principle diagram of a processing device of an information processing system of the present invention, Fig. 2 is a configuration diagram of an embodiment of a processing device of an information processing system of the present invention, and Fig. 3 is a diagram of the processing device of an information processing system of the present invention. Flowchart illustrating the procedure of the initial program of the invention. FIG. 4 is a block diagram showing the device configuration of the processing system in a conventional telephone exchange. DESCRIPTION OF SYMBOLS 1...External input means, 2...Address calculation means, 3...Data writing means, 4...Writing protection means, SGP...Signal processing device, GNP...Call processing device, SVP...Maintenance processing device, CM...Common memory, NW...Network, PU...Processor unit, SW...Switch, SYG...Configuration register group, ROM...Nonvolatile reading Dedicated memory, PM・
...Program memory, PSIG...Signal line.

Claims (1)

[Claims] A central processing unit (PU) and a nonvolatile read-only device connected to the central processing unit (PU) that retains information that defines the initial values, configuration, and functions of the central processing unit (PU). In a processing device of an information processing system that includes a memory (ROM) and a configuration register group (SYG) that defines the initial values, functions, and configuration of the central processing unit (PU), the central processing unit (PU)
External input setting means (1) for externally setting arbitrary values that can be read by the external input setting means (1)
); address calculation means (2) for calculating an address in a non-volatile read-only memory (ROM) according to a value input to the ROM; The data is configured by a group of registers (SYG).
), and a rewrite protection means (4) that protects the configuration register group (SYG) from being rewritten when data writing to the configuration register group (SYG) is completed.
), and a processing device for an information processing system.