JPH0635832A - Disk controller - Google Patents

Abstract

PURPOSE:To reduce the burden on a CPU constituting a disk controller and to increase the data processing speed without complicating the constitution nor increasing the cost of the disk controller. CONSTITUTION:A disk controller 7 is provided together with a storage device 6 which includes many report areas A1-An, a CPU 4, and the deciding areas F1-Fn which decide whether the processing result is stored in each report area or not. Then, the controller 7 stores the processing result in the report area where the processing result is not stored yet and then ends the data processing operation when the processing results are stored in all report areas. A discriminating means 7a is included in the controller 7. Thus, the controller 7 stores the processing results in the areas A1-An based on the discriminated result of the device 7a and regardless of the data stored in the areas F1-Fn before the processing results are once stored in the areas A1-An.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc controller for recording data on a recording medium such as an optical disc and reproducing the recorded data.

In recent years, it has been demanded to further improve the data processing speed of a data processing apparatus using a recording medium such as an optical disk. Therefore, it is required to improve the data processing speed by reducing the burden on the microprocessor as a central processing unit required for the data processing operation without increasing the cost.

[0003]

2. Description of the Related Art The structure of a disk controller will be described with reference to FIG. 6. A disk device 2 is connected to a disk controller 1, and the disk device 2 records / reproduces data on / from a disk such as an optical disk based on a control signal from the disk controller 1. Take action.

A microprocessor unit (hereinafter referred to as MPU) 4 as a central processing unit 4 and a program ROM 5 are connected to the disk controller 1 via a bus 3, and the MPU 4 is a disk based on a program stored in the program ROM 5. The controller 1 is controlled so that the disk controller 1 can access various interfaces.

A local memory 6 as a storage device is connected to the disk controller 1 and a disk device 2
The data processing result is temporarily stored. In such a data processing operation by the disk control device, when the disk device 2 performs a data read operation from the disk under the control of the disk controller 1, for example, a data process indicating whether the read data is normal or not. The result (SW) is stored in the local memory 6.

That is, as shown in FIG. 7, the local memory 6 is composed of a large number of status word areas (hereinafter referred to as SW areas) A1 to An, and the processing results to be reported to the MPU 4 are sequentially sent to the SW areas A1 to An. Is stored.

In order to use the SW areas A1 to An as ring buffers, flag areas F1 to Fn for storing a discrimination signal for discriminating whether or not a processing result is stored in the SW areas A1 to An. Is provided, “1” is stored in the flag area of the SW area in which the processing result is stored by the disk controller 1, and “0” is stored in the SW areas A1 to An flag areas F1 to Fn in which the processing result is not stored. It is stored.

Then, the disk controller 1 sequentially stores the processing result based on the data processing operation in the empty SW area in which the flag area is "0", and stores "1" in the flag area of the SW area.

Therefore, the processing result in the read operation under the control of the disk controller 1 is one of the SW areas A1 to A.
sequentially stored in n, for example, MPU4 after the read operation is completed.
Reads the processing results stored in each of the SW areas A1 to An sequentially to grasp the data processing status.

[0010]

However, in the disk controller as described above, the MPU 4 has the SW areas A1 to An of the local memory 6 at the start of the data processing operation.
It is necessary to reset the flag areas F1 to Fn of "0".

Therefore, there is a problem that the reset operation increases the load on the MPU 4 and delays other processing operations by the MPU 4. An object of the present invention is to reduce the load on a central processing unit constituting the disk control device and speed up the data processing operation without complicating the structure of the disk control device and increasing the cost. To provide.

[0012]

FIG. 1 is a diagram for explaining the principle of the present invention. That is, a disk controller 7 for performing a data processing operation on a disk for recording or reproducing data, a storage device 6 for temporarily storing a processing result by the disk controller 7, and an operation of the disk controller 7 are controlled. A central processing unit 4 is provided, and the storage device 6 temporarily stores the processing result and reports the result to the central processing unit 4.
1 to An and determination areas F1 to F for storing determination signals for determining whether or not the processing result is stored in each of the reporting areas A1 to An.
n is provided, the disk controller 7 stores the processing result in the report areas A1 to An in which the processing result is not stored based on the stored data in the determination areas F1 to Fn of the storage device 6, and Reporting area A1
When a processing result is stored in An and a new processing result occurs in that state, the disk controller is configured to end the data processing operation without storing the processing result. A discriminating device 7a for discriminating whether or not the storage of the processing results in the reporting regions A1 to An has been completed is provided, and the disk controller 7 reports the storage region of the storage device 6 based on the discrimination result of the discriminating device 7a. Until the processing results are stored in A1 to An once, the processing results are stored in the reporting areas A1 to An regardless of the stored data in the determination areas F1 to Fn.

Further, as shown in FIG. 4, in addition to the large number of report areas A1 to An in the storage device 6, a new processing result is stored in all of the report areas A1 to An. A preliminary report area As for storing the processing result and ending the data processing operation is provided.

[0014]

When a data processing operation is started and a processing result to be stored in the storage device 6 is generated, the processing result is stored in each report area until the storage of the processing result in the report areas A1 to An of the storage device 6 is completed. Discrimination area F1 provided in A1 to An
~ Report areas A1 to A regardless of the stored data in Fn
Sequentially stored in n.

Further, in FIG. 4, the report areas A1 to
A new processing result occurs after the processing results are stored in all An, and in that state, further processing results are stored in the report areas A1 to An based on the stored data in the determination areas F1 to Fn. If it is determined that the data cannot be processed, the new processing result is stored in the preliminary report area As, and then the data processing operation ends.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the present invention will be described below with reference to FIGS. The same components as those in the above embodiment will be described with the same reference numerals.

In the disc controller shown in FIG. 2, the disc device 2 is connected to the disc controller 7, and the disc device 2 performs a recording / reproducing operation for a disc such as an optical disc based on a control signal from the disc controller 7.

Further, the disk controller 7 is provided with a ring flag area 7a in which a flag of "1" or "0" is stored. An MPU 4 and a program ROM 8 are connected to the disk controller 7 via a bus 3, and the MPU 4 controls the disk controller 7 based on a program stored in the program ROM 8,
The disk controller 7 can access the disk device 2, the local memory 6 and various interfaces.

A local memory 6 is connected to the disk controller 7 to temporarily store the data processing result by the disk device 2. In the data processing operation by such a disk controller, the disk controller 7
When a data read operation from the disk is performed by the disk device 2 under the control of, the data processing result, for example, whether the read data is normal or not is stored in the local memory 6.

That is, as shown in FIG. 7, the local memory 6 is composed of a large number of status word areas (hereinafter referred to as SW areas) A1 to An, and the processing results are sequentially stored in the respective areas A1 to An.

In order to use the SW areas A1 to An as a ring buffer, flag areas F1 to Fn are provided in the SW areas A1 to An, and the disk controller 7 is provided.
As a result, "1" is stored in the flag area of the SW area in which the processing result is stored, and "0" is stored in the flag area in which the processing result is not stored.

Then, the disk controller 7 sequentially stores the processing result based on the data processing operation in the empty SW area whose flag area is "0" and stores "1" in the flag area.

Therefore, in the read operation under the control of the disk controller 7, the processing result is one of the SW areas A1 to A.
sequentially stored in n, for example, MPU4 after the read operation is completed.
Sequentially reads the processing results stored in the respective SW areas A1 to An to grasp the data processing status, and returns the stored data in the flag areas F1 to Fn of the SW areas A1 to An from which the processing results are read back to “0”. .

Further, the disk controller 7a stores "0" in the ring flag area 7a prior to the start of the data processing operation, and when the storage of the processing result in the SW areas A1 to An has completed, the ring flag area 7a is stored. "1" is stored in.

Then, the disk controller 7 operates from the start of the data processing operation to the storage of the processing results in the SW areas A1 to An for one cycle, that is, the flag stored in the ring flag area 7a is "0". Between the flag areas F1 to F of the SW areas A1 to An of the local memory 6
The operation result is stored in each SW area A1 to An regardless of the stored content of n.

Now, the operation of the disk controller configured as described above will be described with reference to FIG. 3. The disk controller 7 first stores "0" in the ring flag area 7a before starting the data processing operation ( Step 1).

Next, if the data processing operation is not completed, the disk controller 7 continues the data processing operation for the disk via the disk device 2 (steps 2 and 3).

If there is no processing result to be stored in the SW area of the local memory 6, the above data processing operation is repeated and the data processing operation ends (steps 2-4).

When a processing result to be stored in the SW area occurs during the data processing operation, the disk controller 7 sets the flag stored in the ring flag area 7a to "0".
Or "1" (steps 4 and 5).

Since the flag stored in the ring flag area 7a is "0", the disk controller 7 displays the processing result in the SW areas A1 to Fn regardless of the contents stored in the flag areas F1 to Fn of the local memory 6. The data are sequentially stored in An (step 6).

In this way, when the storage of the processing results in the SW areas A1 to An has completed, the disk controller 7
Stores "1" in the ring flag area 7a (steps 7 and 8).

Next, when the data processing operation is continuously performed and a processing result to be stored in the SW areas A1 to An occurs (steps 2 to 4), the disk controller 7 stores "1" in the ring flag area 7a. Is determined (step 5), and the SW area A1 to be stored next is
It is determined whether the storage contents of the flag areas F1 to Fn of An are "0" or "1" (step 9).

Here, in the state where the processing result is stored in each of the SW areas A1 to An as described above, "1" is stored in the flag areas F1 to Fn of the SW areas A1 to An to be stored next. Since the disk controller 7 cannot store the processing result in the local memory 6 any more, the data processing operation ends.

On the other hand, while the processing results are stored in the SW areas A1 to An once, the SW area A1 is set by the MPU4.
When the processing results stored in .about.An are sequentially read, the stored contents of the read flag area of the SW area are reset to "0".

Therefore, in this case, the disk controller 7 detects that the flag area of the SW area to be stored next is "0" (step 9), and stores the processing result in the empty SW area. (Step 10), and then the above operation is repeated.

As described above, in this disk control device,
Each SW area A by MPU4 at the start of data processing operation
1 to An flag areas F1 to Fn are not reset,
While the processing results are stored in the SW areas A1 to An for one cycle, the processing results are stored regardless of the storage contents of the flag areas F1 to Fn.

Therefore, at the start of the data processing operation, the MPU
Since the reset operation of the flag areas F1 to Fn of the local memory 6 by 4 can be omitted, the load of the MPU 4 can be reduced as the SW areas A1 to An are expanded.

Next, a second embodiment embodying the present invention will be described with reference to FIGS. 2, 4 and 5. The local memory 6 of this embodiment has a SW area A1 as shown in FIG.
In addition to ~ An, a spare SW area As is provided.

The disk controller 7 does not always use the spare SW area As, but the SW areas A1 to A
n is used as a ring buffer, and the SW areas A1 to
When there is no free area in An and a processing result to be newly stored occurs, the processing result is stored in the spare SW area As.

The disk controller 7, disk device 2 and MPU 4 are the same as in the first embodiment.
The operation of the disk control device having such a configuration will be described with reference to FIG. 5. Steps 1 to 10 are the same as those in the first embodiment.

That is, in the data processing operation, the storage of the processing result to be stored in the SW areas A1 to An is completed, and the flag area F of the SW areas A1 to An to be stored next is completed.
When the stored contents of 1 to Fn are "1", SW
When a new processing result to be stored in the area is generated, the disk controller 7 stores the processing result in the spare SW area A.
s (step 11), and then the data processing operation ends.

As described above, in this disk control device,
When each SW area A1 to An of the local memory 6 is used as a ring buffer and the processing result is stored in all of the SW areas A1 to An, and a processing result to be newly stored occurs, The processing result is referred to as the preliminary S
Store in the W area As.

As a result, in the first embodiment, the data processing operation is ended without storing the processing result when the processing result to be stored has occurred, but in the second embodiment, the SW areas A1 to Even when a processing result to be newly stored occurs after the processing result is stored in all An,
The processing result can be stored in the spare SW area As to complete the data processing operation.

Therefore, in this embodiment, in addition to the effects of the first embodiment, the read operation is repeated for the last processing result stored in the spare SW area As during the data processing operation at the time of retry. There is no need, and the burden on the MPU 4 can be reduced.

Further, since the spare SW area As is provided in the local memory 6, the cost is not increased. The spare SW area As may be provided in the disk controller 7.

[0046]

As described in detail above, the present invention does not complicate the structure of the disk control device and increase the cost, but the load of the MPU forming the disk control device is reduced and the data processing speed is increased. Exerts an excellent effect that can be achieved.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a block diagram showing a configuration of first and second embodiments.

FIG. 3 is a flowchart showing the operation of the first embodiment.

FIG. 4 is an explanatory diagram showing a local memory according to a second embodiment.

FIG. 5 is a flowchart showing the operation of the second embodiment.

FIG. 6 is a block diagram showing a configuration of a conventional disk control device.

FIG. 7 is an explanatory diagram showing a local memory.

[Explanation of symbols]

 4 Central Processing Unit 6 Storage Device 7 Disk Controller 7a Discriminating Device A1 to An Reporting Area F1 to Fn Discriminating Area

Claims (2)

[Claims] 1. A disk controller (7) for performing a data processing operation on a disk for recording or reproducing data, and a storage device (6) for temporarily storing a processing result by the disk controller (7). A central processing unit (4) for controlling the operation of the disk controller (7), wherein the storage unit (6) temporarily stores the processing result and reports it to the central processing unit (4). In addition to having reporting areas (A1 to An), each reporting area (A1 to A)
n) is provided with a determination area (F1 to Fn) for storing a determination signal for determining whether or not the processing result is stored in the report area, and the disk controller (7) is the storage device. (6)
Report areas (A1 to An) in which the processing result is not stored based on the stored data in the determination areas (F1 to Fn)
The processing result is stored in and all report areas (A
1-An), a disk control device configured to terminate the data processing operation without storing the processing result when a new processing result occurs in that state. The reporting area (A
1 to An) is provided with a discriminating device (7a) for discriminating whether or not the storage of the processing result has completed one round, and the disk controller (7) is provided with the discriminating device (7).
The processing result is stored regardless of the data stored in the determination area (F1 to Fn) until the processing area is completely stored in the report area (A1 to An) of the storage device (6) based on the determination result of a). Is stored in the report area (A1 to An). 2. The storage device (6) includes the report areas (A1 to A) in addition to the plurality of report areas (A1 to An).
2. A preliminary report area (As) for terminating a data processing operation by storing a new processing result generated in the state where the processing result is stored in all of n) is provided. Disk controller.