JPH01169657A - Buffer memory communication system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a buffer memory control method, and particularly to a buffer memory communication method suitable for mutual communication between a plurality of processors.

[Conventional technology]

As described in Japanese Patent Application Laid-Open No. 60-24139, in the case of mutual communication between multiple processors, a conventional device has a buffer memory for storing communication data in each processor, and this buffer In a configuration in which the attributes of the address space of the memory can be changed by the attribute storage means and the processors of the own system or another system are used, communication data can be set in the buffer memory and the attributes of the buffer memory can be changed. mutual communication was realized.

[Problem that the invention seeks to solve]

The above conventional technology does not take into consideration the following points, and has problems in terms of expansion, versatility, and miniaturization.

(1) The processor unit, which has control over the switches that change attributes, also has control over the buffer memory, so it controls mutual communication between multiple processors, resulting in system configuration limitations. receive.

(2) As the number of pro-sensors that communicate with each other increases,
This increases the number of switches, etc. that change the attributes of the buffer memory, and the number of buffer memories, leading to an increase in hardware. For example, if n is the hardware scale of attribute switching switches and buffer memory for mutual communication between two processors, then when trying to realize mutual communication between N processors, (N
-1) Xn hardware is required, which increases in proportion to the number of processors.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to provide an efficient buffer memory communication method that uses the bus less frequently.

[Means for solving problems]

The above purpose is to provide a buffer memory between the buses of each processor, share the address space of this buffer memory as part of the memory space of each processor, and further divide the buffer memory and use the divided buffers. This is achieved by providing a communication data storage area dedicated to each processor and further providing a control device for these buffer memories.

[Effect]

When mutual communication is performed between multiple processors, the buffer memory operates as follows: (1) When a transmission request is received from any processor.

Data is stored in the corresponding area via the bus, and then the signal is sent to the destination processor.

(2) If there is a reception request from any processor, send a signal to the processor and wait for a transmission request from the processor.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

(1) When local reflex processor A1 wants to send information to local processor B4.

Local processor A1 writes information to be transmitted to the area for local processor A in buffer memory 10. After that, buffer memory control device 11 transmits the transmission request from local processor A to local processor 4, and then 4 is read from the local processor A area in the buffer memory 10, and the transmission is completed.

(2) When local processor A1 wants to receive information from local processor C7.

The local processor A1 sends a reception request to the local processor C7 through the buffer memory control device 11, and then the local processor C7 writes the corresponding information to the area for the local processor C in the buffer memory 10, and then writes the information to the area for the local processor C in the buffer memory 10. Control device 11
notifies the local processor that 1 headset is complete,
Next, the local processor A1 reads the corresponding location in the buffer memory 10, and the reception is completed.

By repeating these transmissions and receptions, mutual communication between multiple processors is realized.

FIG. 2 shows the processing flow of each processor A to C.

〔Effect of the invention〕

According to the present invention, the following effects can be considered.

(1) Miniaturization Compared to the conventional method's nx (Nl) (where n is the hardware size when two processors are connected, and N is the number of connected processors), this method only requires adding one port for each additional processor. The invention is 0, 8 n + 0, 2 n
N -1), which allows for miniaturization.

(2) In a general-purpose multiprocessor system, mutual communication can be carried out freely without any restrictions, which facilitates system configuration.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, and Fig. 2 is a block diagram of an embodiment of the present invention.
It is a processing flow diagram of a processor. 1.4.7...Local processor, 2.5゜8...
- Main memory, 3, 6.9 - Bus, 10... Buffer memory, 11... Buffer memory control device.・ 6 ・

Claims (1)

[Claims] 1. In a multiprocessor system that performs mutual communication between a plurality of processors, a buffer memory is provided for storing communication data of each processor, and the address space of the buffer memory is shared by each processor. A buffer memory communication method is characterized in that an area in the buffer memory is allocated to each processor.