JPH03172959A - Information processing system - Google Patents

Abstract

PURPOSE:To synchronize control parts with each other without extending hardware by providing a transfer means, which gives contents of a control register corresponding to one control part to a control register corresponding to the other control part, between control registers. CONSTITUTION:Since a part 3 to be controlled can transmit the instruction in one control part 1 or 2 to the other control part 2 or 1 through a transfer means 7 provided between control registers 4 and 5, contradictions of control between control parts 1 and 2 are prevented. The part 3 transmits a connection signal to one control part 1 or 2 when transmitting and receiving information to and from the other control part 2 or 1 and transmits an end signal at the time of the end of information transmission/reception.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used for transmitting and receiving information between a plurality of control units in an information processing system. The present invention relates to synchronization between a control unit that serially transmits and receives information to and from a controlled unit.

〔overview〕

In the present invention, a plurality of control units are connected to one controlled unit,
In an information processing system that transmits and receives information serially, synchronization between control units can be achieved without increasing hardware by enabling connection information to be exchanged between the control registers of the controlled units and the control unit. It was designed to take the following.

[Conventional technology]

FIG. 2 is a block diagram showing the configuration of a conventional device.

The configuration is such that two control units 1 and 2 can commonly control common resources such as one controlled unit 3 (for example, a memory device). This covering part 3 has a control unit 1 or 2.
Control registers 4.5 are provided in correspondence with the number of control units at the interface with the control unit. Commands from the control unit 1 are written into the control register 4, and the controlled unit receives the commands by reading the contents of the control register 4. Information from the controlled section 4 to the control section 1 is transmitted by writing in this control register 4 and having the control section 1 read the contents. The same holds true for the relationship between the control section 2 and the control register 5.

In the conventional device, an information line 6 is provided between the control units 1 and 2 to prevent two control units from simultaneously giving contradictory commands to one controlled unit 3, and information is transmitted via this information line 6. The two control units 1 and 2 were communicated and synchronized.

[Problem to be solved by the invention]

Such conventional synchronization control between control units requires the provision of information lines required for synchronization between the control units, which has the problem of increasing hardware.

The present invention solves these problems, and aims to provide a system that can synchronize control units without increasing hardware.

[Means to solve the problem]

In the present invention, a plurality of control units are connected to one controlled unit, the controlled unit is provided with a control register corresponding to each of the plurality of control units, and the control unit and the controlled unit are connected to one controlled unit. In an information processing system that individually transmits and receives information via registers, between the control registers,
The present invention is characterized by comprising a transfer means for giving at least part of the contents of a control register corresponding to another control section to a control register corresponding to one control section.

The transfer means includes means for giving information to the other control registers that the contents of one control register are being changed, and the control unit is configured to provide the information to the control register corresponding to the control unit. The controlled unit may be a common resource used by a plurality of control units.

[Effect]

Since the controlled unit can transmit the command of one control unit to another control unit via the transfer means provided between the control registers, it is possible to prevent conflicts in control between the control units. . Further, when transmitting and receiving information with a corresponding control section, a connection signal can be transmitted to another control section, and when the transmission and reception of information is completed, a termination signal can be transmitted.

This allows synchronization between multiple control units without increasing hardware.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

In the embodiment of the present invention, a plurality of control sections 1 and 2 are connected to one controlled section 3, and the controlled section 3 is provided with control registers 4 and 5 corresponding to the plurality of control sections 1 and 2, respectively. The units 1 and 2 and the controlled unit 3 are configured to individually transmit and receive information via the control registers 4 and 5, and the control registers 4 and 5 correspond to one control unit 1 or 2. A transfer means 7 is provided for giving at least a part of the contents of the control register 5 or 4 corresponding to the other control section 2 or 1 to the control register 4 or 5 corresponding to the other control section 2 or 1.

The transfer means 7 includes means for giving information that the contents of one control register 4 or 5 are being changed to the other control register 5 or 4, and the control unit 1 or 2 The controlled unit 3 includes a common resource used by the plurality of control units 1 and 2. can be.

Next, the operation of the embodiment of the present invention configured as described above will be explained.

Assuming that the controlled unit 3 is a common memory device, accesses and commands from the control unit 1 are performed by sequentially writing data to the control register 4. The controlled unit 3 sequentially reads the contents of the control register 4 and receives the command.

At this time, the control register 4 provided corresponding to the control section 1 sends and receives information to and from the control section 1 via the transfer means 7 to the control register 5 provided corresponding to the control section 2. Communicate information.

When the control section 2 reads the information in the control register 5, it finds that the controlled section 3 is in a busy state.

Based on this information, the control section 2 waits without performing any new transmission/reception to/from the controlled section 3.

When the transmission and reception of information between the control unit 1 and the controlled unit 3 is completed,
The control register 4 transmits a signal notifying the end to the control register 5 via the transfer means 7. control register 5
receives the signal and informs the control unit 2 that the transmission and reception of information between the control unit l and the controlled unit 3 has been completed.The control unit 2
As a result, it is possible to start transmitting and receiving information to and from the controlled unit 3.

In this way, synchronization can be established between the control units 1 and 2 to serially transmit and receive information to and from the controlled unit 3.

In this embodiment, an example in which two control units are connected to a controlled unit has been described, but the number of control units is not limited.

〔Effect of the invention〕

As explained above, according to the present invention, by transmitting and receiving connection information with the control unit between the control registers of the controlled units and synchronizing the control units, it is possible to avoid increasing the hardware. There is an effect that can be done.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of a conventional example. 1.2... Control section, 3... Controlled section, 4.5...
Control register, 6...information line, 7...transfer means.

Claims (1)

[Claims] 1. A plurality of control units are connected to one controlled unit, and the controlled unit is provided with a control register corresponding to each of the plurality of control units, and the control unit and the controlled unit are connected to each other. In an information processing system in which information is transmitted and received individually via these control registers, at least the content of the control register corresponding to one control unit is transferred between the control registers to the control register corresponding to the other control unit. An information processing system characterized by comprising a transfer means for providing a portion of the information. 2. The transfer means includes means for giving information to the other control registers that the contents of one control register are being changed, and the control section transfers the information to the control register corresponding to the control section. 2. The information processing system according to claim 1, further comprising means for controlling the system to enter a busy state and wait for new access when a new access is granted. 3. The information processing system according to claim 1 or 2, wherein the controlled unit is a common resource used by a plurality of control units.