JP3056169B2 - Data transmission / reception method and method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission / reception method between a plurality of storage devices, and more particularly to an improvement in data transmission / reception processing speed of a storage device and an increase in work area efficiency.

[0002]

2. Description of the Related Art Conventionally, this type of data transfer system has been used for the purpose of efficiently performing transmission / reception data processing by eliminating useless communication. One example of such a transfer method is described in Japanese Patent Application Laid-Open No. 61-170855.

FIG. 4 shows a data transfer method described in the above publication. An application buffer 24 and a driver 21 for transmitting and receiving data are incorporated in the main storage device 20. The driver 21 includes an input command including a data transfer command for transferring data received in the device area 25 to the application buffer 24 and a transfer destination address setting command for setting a plurality of storage addresses in the storage device for the data. A microprogram execution control unit for executing an output control instruction is provided. The driver 21 is located between the reception buffer 22, the transmission buffer 23, and the application buffer 24 in the device area 25. The driver 21 transfers the data in the application buffer 24, the transmission buffer 23 in the device area 25, and the data in the reception buffer 22. It is carried out.

In this specification, the main storage device 20
Is referred to as an application, a buffer in the main storage device 20 is referred to as an application buffer 24, and a processing function for transmitting and receiving data is referred to as a driver 21.

[0005] Regarding the transmission processing from the main storage device 20 to the external bus 27, the driver 21 transfers the data written in the application buffer 24 to the device area 25.
Is transferred to the transmission buffer 23. Regarding the reception processing, the driver 21 checks whether the data written in the reception buffer 22 in the device area 25 is normal,
If normal, transfer to the application buffer 24 is performed.

Further, the driver 21 responds to a data transfer address setting command by setting a plurality of data transfer address registers for setting a data transfer address, and determining whether the transfer area designated by the address register is empty. Are provided.

FIG. 5 is a flowchart showing the conventional data transmission method shown in FIG. In the data transmission process, the application in the main storage device 20 performs the data transmission process at the transmission stage by the application buffer 24 (step 21), and the application buffer 24 checks whether the data transmitted is normal. Then, if it is normal, the data in the main storage device 20 is transmitted to the transmission buffer 23 in the device area 25 (step 23). If the transmission data is not normal, the transmission data is discarded.

FIG. 6 is a flowchart showing the conventional data receiving method shown in FIG. 4. In the data receiving process, when data is received in the device area 25 from the inside of the input / output control device (not shown), the received data is received. An input / output port indicating presence is included, and the main storage device 20 is notified of the presence of received data via the input / output port. Driver 2
In step 1, an input / output control device or the like searches an input / output port for data input from a peripheral device (step 31) and waits until received data comes to the input / output port (step 32). If there is received data, the driver 21
Checks whether the received data is normal (step 33), and if the received data is not normal, discards the received data and returns to step 31. On the other hand, if the received data is normal, even if the data transfer instruction has not been issued,
It is determined whether the state of the busy / free identifier register corresponding to the data transfer address register designated by the transfer address pointer register is empty (step 35). If there is no empty state, it waits until it becomes empty. (Step 35) If empty, data transfer processing is performed to the transfer area in the main storage device 20 set in the transfer address register (Step 3).
7). If it is not empty, it waits, and after confirming that it is empty, performs transfer processing (step 35).

[0009]

However, since the received data from the device must be transferred to the application buffer, the data transfer processing time is increased. Also, in the transmission data processing, the data written in the application buffer must be transferred to the transmission buffer in the device, so that a processing time for the data transmission processing is required.

Also, a buffer for data transmission / reception is provided in the application area, and data must be transferred to the application buffer for processing by the application, and the processing must be performed there. Consume it.

[Object of the Invention] An object of the present invention is not to perform an operation of transferring received data to an application buffer in order for an application to perform processing, and the application performs processing in a transmission buffer and a reception buffer in a device area. Is to do so. It is another object of the present invention to eliminate the need for providing an application buffer and to efficiently use an area.

[0012]

In order to achieve the above object, according to the data transmission / reception system of the present invention, a device area having a transmission / reception buffer at an interface with another storage device, a transmission buffer within the device area, and a reception area are provided. A driver for requesting transmission / reception to / from a buffer, and an application for writing data to a transmission buffer in the device area according to a request from the driver or reading data from the reception buffer. Data is transmitted and received between a transmission buffer and a reception buffer in the device area.

In the data transmission / reception system of the present invention, a transmission buffer area and a reception buffer area are allocated to a device area. Further, a data reception processing driver for checking whether the received data is normal data and notifying the application of the buffer address where the received data is stored is provided. These drivers are used by applications to receive data.

Similarly, in the transmission processing, a data transmission start driver for notifying the application of a transmission buffer address to which data is to be written and a data transmission processing driver for checking whether the data written by the application is normal are provided.

In the reception processing, the application uses a data reception processing driver. The data reception processing driver checks whether the data received in the reception buffer is normal data, and if the data is normal, notifies the application of the buffer address containing the data in the reception buffer.

[0016] Thus, the application can know the location of the received data and process the data at the location.

In the transmission processing, the application uses a data transmission start processing driver. The data transmission start processing driver notifies the application of a place to write data. The application writes data in the transmission buffer and checks whether the data written by the application is normal using the data transmission processing driver. If the data is normal, the application performs transmission processing.

According to the present invention, in a data transmission / reception method for performing data transmission / reception between a main storage device and another storage device, a device area having a transmission / reception buffer at an interface with the other storage device; A driver that requests transmission and reception to a certain transmission buffer and a reception buffer, and an application that performs writing of data to the transmission buffer of the device area by a request from the driver and reads data from the reception buffer, Data is transmitted and received between an application and the transmission buffer and the reception buffer in the device area.

According to the present invention, there is provided a data transmission / reception method for transmitting / receiving data between a main storage device and another storage device, comprising: a device area having a transmission / reception buffer at an interface with the other storage device; A driver for requesting transmission and reception to a certain transmission buffer and a reception buffer, and an application for writing data to the transmission buffer of the device area by a request from the driver and reading data from the reception buffer, When transmitting data, the driver detects an empty state of the transmission buffer in response to a transmission data transmission request from the application, and if the empty state, transfers the transmission data from the application to the transmission buffer. The transmission data is normal Check Check whether that notifies a free address in the transmission buffer of the empty state in the application, the driver,
At the time of data reception, it is detected whether or not there is data in the reception buffer, and if there is data, it is checked whether or not the reception data in the reception buffer is normal. The storage address is notified.

[Operation] According to the present invention, since the transfer processing from the application buffer to the transmission buffer in the device and from the reception buffer in the device to the application buffer is not performed, the effect of shortening the processing time can be obtained. In addition, since transfer is not performed, it is not necessary to provide an application buffer, and instead of performing the processing to be performed by the application in the buffer provided in the device area, the application buffer can be substituted. Become.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described.
This will be described in detail with reference to the drawings.

FIG. 1 shows a data transfer system according to the present embodiment. The data transfer method according to the present embodiment uses an RA that serves as an interface between hardware and software such as the main storage device 10, the external storage device 18, the central processing unit 16, and the input / output device 17.
It comprises a device area 15 provided with an M area, and is connected to a central processing circuit 16 and an input / output device 17 (not shown) via an address bus and a data bus.

The main storage device 10 stores the application 1
4 and a driver 11 for designating an address for transmission / reception to the application 14 and checking whether or not data to be transmitted / received is normal. The device area 15 is provided with a reception buffer 12 for sending data from an external bus to the application 14 and a transmission buffer 13 for sending data from the application 14 to the outside.

The driver 11 uses a data reception processing driver of the application 14 in the reception processing.
The data received in the reception buffer 12 is checked by the data reception processing driver 113 to determine whether it is normal data. If the data is normal, the buffer address containing the data in the reception buffer 12 is changed by the application 14. Notify.

The driver 11 uses the data transmission start processing driver 111 for the application 14 in the transmission processing. Data transmission start processing driver 111
Indicates where to write data to application 14
Notify. The application 14 has a transmission buffer 13
Write data in the data transmission processing driver 112
Is used to check whether the data written by the application 14 is normal. If the data is normal, a transmission process is performed.

Here, the driver 11 includes a reception buffer 12 and a transmission buffer 13 in a device 15 such as a RAM.
Is not located in the middle of the application 14, and no data transfer processing is performed between them. Although the data transfer process is not directly performed between the application 14 and the driver 11, in the case of the reception process, the driver 11 checks whether the reception data in the reception buffer 12 is normal data, and determines that the reception data is normal. Then, an operation of notifying the application 14 of the buffer address of the reception buffer 12 in which the data is written is performed.

In the transmission process, the driver 11
The application 14 is notified of the buffer address of the transmission buffer 13 in which the data is to be written.
4 finishes writing the data in the transmission buffer 13, the driver 11 checks whether or not the data is normal. If the data is normal, the driver 11 performs transmission processing. As described above, the driver 14 notifies the buffer address of the transmission buffer 13, so that the application 14 can perform processing in the transmission buffer 13 and the reception buffer 12 in the device area 15, and the driver 11 itself transfers the data. By not performing the processing, it is possible to speed up the transmission / reception processing.

According to the present embodiment, the transmission buffer area 13 and the reception buffer area 12 are allocated to the device area 15, and the driver 11
The application 14 is notified of the buffer address at which the writing / reading of 5 should be performed. Application 1
4 performs processing in the notified buffer area 15, so that data transmission / reception processing can be performed without performing any data transfer processing. Therefore, according to the present embodiment, since the data transfer process is not performed at all, the processing time is shortened, and the application buffer area of the transfer destination is not required, so that the effective use of the work area is expected.

[Operation of the Present Embodiment] Hereinafter, regarding the operation of the present embodiment, FIG. 2 shows a flowchart of the data transmission system according to the present embodiment, and FIG. 3 shows a flowchart of the data reception system of the present embodiment. This will be described in detail.

In the transmission processing of the present embodiment, referring to FIG. 2, application 14 uses a data transmission start driver to request release of transmission buffer 13 (step 1). The data transmission start driver releases the transmission buffer 13 in the device area 15 and notifies the application 14 of the buffer address where the transmission data is to be written (step 2). The application 14 writes data to the notified buffer address (step 3). At the same time, for data transmission, the application 1 is used by using the driver 11 (step 4).
4 checks whether the data written at the designated address in the transmission buffer 13 is normal data, and if the data is normal data, performs transmission processing to the external bus (step 5). Next, a receiving process for receiving data from the external bus will be described with reference to FIG. In the receiving process of the present embodiment, the application 14 checks whether or not data exists in the receiving buffer 12 by the data receiving process driver (step 11). If data has been written to the reception buffer 12 in the device area 15, the data reception driver 11 checks whether the data is normal data (step 12). If there is no reception data in the reception buffer 12, it waits until the next data is received (step 13).

When reception data exists in the reception buffer 12,
If the data is normal, the driver 11 for data reception uses the application 14
Is notified of the buffer address where the data is written (step 14). If the received data is not normal data, the received data is discarded (step 15), and the process returns to step 11 to perform the next data receiving process.

After the processing in step 14, there is normal data, and the application 1 notified of the buffer address
4 performs processing within the notified buffer address of the reception buffer 12 in the device area 15 (step 1).
6) After the processing is completed, the reception processing of the next data is performed.

Although the above embodiment has been described as a main storage device for convenience of explanation, a hard disk or an MO (Ma
gneto-Optics), storage devices such as magnetic tapes,
By having a buffer area and a driver in each storage device, the present invention can be applied.

In the above embodiment, the buffer area is described as a RAM. However, the present invention is not limited to the RAM, but may be a flash memory or a cache memory.
And SDRAM (Synchronous Dynamic Random Access Me
mory).

[0035]

As described above, according to the present invention, the driver 11 does not need to perform data transfer (data transfer processing) between the transmission buffer 13 / reception buffer 12 and the application 14 in the device. This has the effect of improving the processing speed in the transmission / reception processing.

In addition to the improvement of the processing speed, the absence of the transfer processing eliminates the necessity of using the buffer area of the transfer destination, so that the application buffer area becomes unnecessary. This has the effect of effectively utilizing the area.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a data transfer method according to the present invention.

FIG. 2 is a flowchart illustrating a data transmission method according to the present invention.

FIG. 3 is a flowchart illustrating a data receiving method according to the present invention.

FIG. 4 is a block diagram showing a conventional data transfer method.

FIG. 5 is a flowchart showing a conventional data transmission method.

FIG. 6 is a flowchart showing a conventional data receiving method.

[Explanation of symbols]

 10, 20 Main storage device 11, 21 Driver 12, 22 Reception buffer in device 13, 23 Transmission buffer in device 14 Application buffer in main storage device 15, 25 Device area 16, 26 Central processing circuit 17 Input / output device 18 Storage device 24 Application in main storage device 27 External bus

Claims (6)

(57) [Claims] 1. A data transmitting and receiving system for transmitting and receiving data between the main memory and other storage devices, and a device area having a transmission and reception buffer to interface with the other storage device, is connected to the device area
And a the said main storage device, and the main storage device requests to receive the transmit and receive buffers in the device area drivers, to the transmission buffer in said device area by a request by the driver configured to write to the data from the embodiment and and the receive buffer by the application to be read out the data, the driver is transmitting or receiving data of the said transmission and reception buffer
Check means for checking whether data is normal
The provided data transceiver system, characterized by the transmission and reception of data between the inter-transmission buffer and the reception buffer in said device area and the application in accordance with said address instructions in each buffer by the driver. 2. The data transmission / reception system according to claim 1, wherein the driver detects an empty state of the transmission buffer in response to a transmission data transmission request from the application when transmitting data to the other storage device. Detecting means for transferring the transmission data from the application to the transmission buffer if the application is free, and checking whether or not the transmission data is normal. A data transmission / reception system comprising: a notification unit for notifying an empty address in the transmission buffer. 3. The data transmission / reception system according to claim 1, wherein the driver detects whether or not there is data in the reception buffer when receiving data from the other storage device; Checking means for checking whether or not received data in the receiving buffer is normal when the presence is detected, and notifying means for notifying the application of a storage address of the received data in the receiving buffer to the application. Data transmission / reception method. 4. The data transmission / reception system according to claim 1, wherein said device area is constituted by a flash memory, a RAM, and a cache memory. 5. A data transmission / reception method for transmitting / receiving data between a storage device and another storage device, comprising: a device area having a transmission / reception buffer of the storage device at an interface with the other storage device;
The main storage device connected to the area,
The storage device performs a data write to a transmission buffer of the device area in response to a request from the driver for requesting transmission / reception to a transmission buffer and a reception buffer in the device area. The driver detects an empty state of the transmission buffer in response to a transmission data transmission request from the application when transmitting data to the other storage device. Transferring the transmission data from the application to the transmission buffer, checking whether the transmission data is normal or not, notifying the application of an empty address in the empty transmission buffer, is data from said another storage device At the time of reception, it is detected whether or not there is data in the reception buffer, and if there is data, it is checked whether or not the reception data in the reception buffer is normal. A data transmission / reception method for notifying a storage address. 6. The data transmission / reception method according to claim 5, wherein the driver is a data transmission start driver that starts operation in accordance with an instruction of the application operating at the time of data transmission, and the transmission data in the transmission buffer is normal. A data transmission / reception method, comprising: a data transmission processing driver that checks whether or not the data is received; and a data reception processing driver that operates when receiving the data.