JP3264985B2 - Disk controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

2. Description of the Related Art In recent years, a data processing apparatus using a recording medium such as an optical disk has been required to increase its data processing speed. Therefore, it is required to improve the data processing speed by reducing the load on the microprocessor as the 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 controller 2 is connected to a disk controller 1, which records and reproduces data on and from a disk such as an optical disk based on a control signal from the disk controller 1. Perform the operation.

[0004] A microprocessor unit (hereinafter referred to as MPU) 4 as a central processing unit and a program ROM 5 are connected to the disk controller 1 via a bus 3, and the MPU 4 stores a disk based on a program stored in the program ROM 5. The controller 1 is controlled, and the disk controller 1 can access various interfaces.

The disk controller 1 is connected to a local memory 6 as a storage device.
Is temporarily stored. In the data processing operation of such a disk control device, when a data read operation from, for example, a disk is performed by the disk device 2 based on the control of the disk controller 1, for example, the data processing to determine whether the read data is normal is performed. 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 number of status word areas (hereinafter, SW areas) A1 to An, and processing results to be reported to the MPU 4 are sequentially stored in each SW area 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 determination signals for determining whether or not processing results are stored in the SW areas A1 to An. Is provided 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. Is stored.

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

Therefore, in the reading operation under the control of the disk controller 1, the processing result is stored in each of the SW areas A1 to A.
n, for example, after the end of the read operation, the MPU 4
Sequentially reads the processing results stored in each of the SW areas A1 to An to grasp the data processing status.

[0010]

However, in the above-described disk control device, when the data processing operation is started, the MPU 4 operates the respective SW areas A1 to An of the local memory 6.
Must be reset to "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. SUMMARY OF THE INVENTION An object of the present invention is to provide a disk control apparatus capable of reducing the load on a central processing unit constituting the disk control apparatus and increasing the speed of data processing operation without complicating the configuration of the disk control apparatus and increasing the cost. Is to provide.

[0012]

FIG. 1 is a diagram illustrating 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 includes a plurality of report areas A for temporarily storing the processing results and reporting the processing results to the central processing unit 4.
1 to An, and discrimination areas F1 to F for storing discrimination signals for discriminating whether or not a processing result is stored in each report area A1 to An.
n, the disk controller 7 stores the processing results in the report areas A1 to An in which the processing results are not stored based on the storage data in the determination areas F1 to Fn of the storage device 6, and Report area A1
A processing result is stored in An, and when a new processing result occurs in that state, the disk controller is configured to terminate the data processing operation without storing the processing result. A discriminating device 7a for discriminating whether or not storage of the processing results in the report areas A1 to An has been completed is provided, and the disk controller 7 determines whether the storage area of the storage device 6 is Until the storage of the processing results in A1 to An is completed, the operation is performed so as to store the processing results in the report areas A1 to An irrespective of the data stored in the determination areas F1 to Fn.

Further, as shown in FIG. 4, in the storage device 6, in addition to the large number of report areas A1 to An, all the report areas A1 to An store a new processing result in a state where the processing results are stored. 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
領域 Fn, regardless of the stored data in Fn.
n.

In FIG. 4, the report areas A1 to A1
After a processing result is stored in all of An, a new processing result occurs. In that state, further processing results are stored in the report areas A1 to An based on the data stored 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 of the present invention will be described below with reference to FIGS. Note that the same components as those in the above-described embodiment will be described with the same reference numerals.

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

The disk controller 7 is provided with a ring flag area 7a for storing a flag of "1" or "0". The MPU 4 and the program ROM 8 are connected to the disk controller 7 via the 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, and the result of data processing by the disk device 2 is temporarily stored therein. In such a data processing operation by the disk controller, the disk controller 7
When a data read operation from, for example, a disk is performed by the disk device 2 based on the above control, for example, a data processing result indicating whether or not the read data is normal is stored in the local memory 6.

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

To use the SW areas A1 to An as a ring buffer, the SW areas A1 to An are provided with flag areas F1 to Fn.
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 an empty SW area where the 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 stored in each of the SW areas A1 to A.
n, for example, after the end of the read operation, the MPU 4
Sequentially reads out the processing results stored in the respective SW areas A1 to An to grasp the data processing status, and returns the data stored in the flag areas F1 to Fn of the SW areas A1 to An from which the processing results have been read back to “0”. .

The disk controller 7a stores "0" in the ring flag area 7a prior to the start of the data processing operation. When the storage of the processing result in the SW areas A1 to An completes, the disk controller 7a sets the ring flag area 7a. To "1".

Then, the disk controller 7 operates from the start of the data processing operation until the storage of the processing result in the SW areas A1 to An completes, that is, when the flag stored in the ring flag area 7a is "0". The flag areas F1 to F of the SW areas A1 to An of the local memory 6
Regardless of the storage content of n, the operation of storing the processing result in each of the SW areas A1 to An is performed.

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

Next, if the data processing operation is not completed, the disk controller 7 continues to perform the data processing operation on 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 to 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 stores 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. An is sequentially stored in An (step 6).

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

Next, when the data processing operation is continuously performed and processing results to be stored in the SW areas A1 to An occur (steps 2 to 4), the disk controller 7 stores "1" in the ring flag area 7a. Is determined (step 5), and the SW areas A1 to A5 to be stored next are determined.
It is determined whether the stored contents of the flag areas F1 to Fn of An are “0” or “1” (step 9).

Here, when the processing results are stored in the respective 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 MPU 4 uses the SW area A1.
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 vacant SW area. (Step 10), and then the above operation is repeated.

As described above, in this disk control device,
Each SW area A by the MPU 4 at the start of the data processing operation
Without resetting the flag areas F1 to Fn of 1 to An,
While the processing results are stored in the SW areas A1 to An once, 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
4, the reset operation of the flag areas F1 to Fn of the local memory 6 can be omitted, so that the load on the MPU 4 can be reduced as the SW areas A1 to An are expanded.

Next, a second embodiment of 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.
A spare SW area As is provided in addition to .about.An.

Then, the disk controller 7 does not always use the spare SW area As and uses the SW areas A1 to A
n as a ring buffer, and the SW areas A1 to
If there is no free area in An and there is a processing result to be newly stored, an operation is performed to store the processing result 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 in the first embodiment.

That is, in the data processing operation, the storage of the processing results to be stored in the SW areas A1 to An completes one cycle, and the flag area F of the next SW area A1 to An is stored.
While the storage contents of 1 to Fn are “1”, the SW
When a processing result to be stored in the area newly occurs, the disk controller 7 stores the processing result in the spare SW area A.
s (step 11), and the data processing operation ends.

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

As a result, in the first embodiment, the data processing operation is terminated without storing the processing result in a state where the processing result to be stored is generated. Even when the processing result to be newly stored after the processing result is stored in all of An,
The processing result can be stored in the spare SW area As, and the data processing operation can be completed.

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

Since the spare SW area As is provided in the local memory 6, the cost does not increase. The spare SW area As may be provided in the disk controller 7.

[0046]

As described in detail above, the present invention reduces the load on the MPU constituting the disk controller without complicating the configuration of the disk controller and increasing the cost, thereby increasing the speed of the data processing operation. An excellent effect can be achieved.

[Brief description of the drawings]

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

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

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

FIG. 4 is an explanatory diagram illustrating 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-An Reporting Area F1-Fn Discriminating Area

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G06F 13/00-13/14 G06F 3/06-3/08 G06F 13/38-13/42

Claims (2)

(57) [Claims] 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); A central processing unit (4) for controlling the operation of the disk controller (7), wherein the storage device (6) temporarily stores the processing results and reports the results to the central processing unit (4). A report area (A1 to An) is provided and each report area (A1 to A
n) is provided with a discrimination area (F1 to Fn) for storing a discrimination signal for discriminating whether a processing result is stored in the report area, and the disk controller (7) is provided in the storage device. (6)
Report areas (A1 to An) in which the processing results are not stored based on the data stored in the determination areas (F1 to Fn)
The processing result is stored in all report areas (A
1 to 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 controller (7) has the report area (A
1 to An), and a discriminating device (7a) for discriminating whether or not storage of the processing result in one cycle has been completed.
Until storage of the processing result in the report area (A1 to An) of the storage device (6) is completed based on the determination result of a), the processing result is independent of the data stored in the determination area (F1 to Fn). In the report area (A1 to An). 2. The storage device (6) includes, in addition to the plurality of report areas (A1 to An), the report areas (A1 to A1).
2. A spare report area (As) for storing a new processing result generated in a state where the processing result is stored in all of n) and terminating the data processing operation is provided. Disk control unit.