CN105279048B - A kind of data reconstruction method and device - Google Patents
A kind of data reconstruction method and device Download PDFInfo
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Abstract
The invention discloses a kind of data reconstruction method and device, this method includes：If by specifying the specified data that region is read to read former exclusive or information, the original position information for former check code and the initial data present position in the total data with the check code consistent with former check code that the initial data is calculated according to assignment algorithm for storing initial data obtained to specific bit progress exclusive or during specified region to the initial data in advance there are mistake；Generation N number of primary election data corresponding with former exclusive or information, and according to the object identifier code of each primary election data of assignment algorithm calculating；The corresponding primary election data of the object identifier code consistent with former check code are determined to select data eventually, and determine that it is target position information to select data location in the total data with the check code consistent with former check code eventually；It is initial data to determine that consistent with original position information target position information corresponding end selects data, so as to ensure that the reliability of data.
Description
Technical field
The present invention relates to chip design art field, more specifically to a kind of data reconstruction method and device.
Background technology
With RAM (Random-Access Memory, random access memory) more and more, the scale used in chip
It is increasing, improve RAS (Reliability, Availability and Serviceability, reliability, the availability of RAM
And serviceability) performance becomes the reliability and availability for improving whole chip, and then reduces the key of the use cost of chip
One of factor.
But due to manufacture or the reason such as time, RAM is it is possible that the situation of the corrupt data of storage, once RAM
The corrupt data of storage, it will cause chip failure or chip efficiency to decline.It is used for the data to RAM storages in the prior art
The preferably a kind of method for carrying out error correction is ECC (Error Checking and Correction, error checking and amendment) school
Checking method, however, traditional ECC check algorithm can only correct the situation of a data error, once there is long numeric data error,
It is then helpless, therefore, cause the data reliability of RAM relatively low.
In conclusion in the prior art be used for RAM storage data carry out error correction technical solution there are reliability compared with
The problem of low.
The content of the invention
The object of the present invention is to provide a kind of data reconstruction method and device, to solve the number that the prior art stores RAM
The problem of reliability present in technical solution according to progress error correction is relatively low.
To achieve these goals, the present invention provides following technical solution：
A kind of data reconstruction method, including：
If by specifying the specified data that region is read to read there are mistake and in advance store initial data to specified
The specific bit of the initial data is carried out during region former exclusive or information that exclusive or obtains, according to assignment algorithm to the initial data into
The capable former check code being calculated and the initial data are in the total data with the check code consistent with the former check code
The original position information of present position；
Generation N number of primary election data corresponding with the original exclusive or information, and calculate each primary election according to the assignment algorithm
The object identifier code of data；
The corresponding primary election data of the object identifier code consistent with the former check code are determined to select data eventually, and described in determining
It is target position information to select data location in the total data with the check code consistent with the former check code eventually；
It is initial data to determine that consistent with original position information target position information corresponding end selects data.
Preferably, the specific bit progress exclusive or to the initial data obtains former exclusive or information, including：
Exclusive or is carried out to two bits adjacent in the initial data, its length is obtained and is equal to the initial data length
Half former exclusive or information.
Preferably, the initial data is carried out according to assignment algorithm that former check code is calculated, including：
The initial data is calculated using ECC check algorithm, obtains the former check code.
Preferably, determining the positional information of the initial data includes：
Total data with the check code consistent with the former check code is ranked up according to default rule, is counted
According to sequence, and determine that initial data location in the data sequence is the original position information.
Preferably, further include：
By reading specified data in the specified region, and judged using ECC check algorithm be in the specified data
It is no there are bit error, if it is, judge whether the bit error is 1, if the bit error is 1
Position, then obtain initial data according to the ECC check algorithm, if the bit error is not 1, it is different to obtain the original
Or information, former check code and original position information.
A kind of Data Recapture Unit, including：
Read module, if for by specifying the specified data that read of region there are mistake, read former exclusive or information,
Former check code and original position information；
Exclusive or module, it is different to specific bit progress during specified region to the initial data in advance storing initial data
Or obtain former exclusive or information；
Check code module, in advance by initial data store to during specified region according to assignment algorithm to the initial data
Carry out that former check code is calculated；
Position module, in advance storing initial data to specified region when determine the initial data with it is described
Location is original position information in the total data of the consistent check code of former check code；
Generation module, for generating N number of primary election data corresponding with the original exclusive or information, and according to the assignment algorithm
Calculate the object identifier code of each primary election data；
First determining module, for determining that the corresponding primary election data of the object identifier code consistent with the former check code are end
Data are selected, and determine that the end selects data position residing in the total data with the check code consistent with the former check code
It is set to target position information；
Second determining module, for determining that consistent with original position information target position information corresponding end selects data
For initial data.
Preferably, exclusive or module includes：
Exclusive or unit, for carrying out exclusive or to two bits adjacent in the initial data, obtains its length and is equal to institute
State the former exclusive or information of the half of initial data length.
Preferably, check code module includes：
Check code unit, for being calculated using ECC check algorithm the initial data, obtains the former verification
Code.
Preferably, position module includes：
Position units, for by the total data with the check code consistent with the former check code according to default rule into
Row sequence, obtains data sequence, and determines that initial data location in the data sequence is the original position
Information.
Preferably, further include：
Acquisition module is triggered, for judging by reading specified data in the specified region, and using ECC check algorithm
It whether there is bit error in the specified data, if it is, judging whether the bit error is 1, if institute
Bit error is stated as 1, then obtains initial data according to the ECC check algorithm, if the bit error is not 1
Position, then obtain former exclusive or information, former check code and the original position information.
A kind of data reconstruction method provided by the invention and device, this method include：If read by specifying region
Specified data then read there are mistake and in advance store initial data to specific bit progress during specified region to the initial data
Former exclusive or information that exclusive or obtains, the former check code that the initial data is calculated according to assignment algorithm and the original number
According to the original position information of the present position in the total data with the check code consistent with former check code；Generation is believed with former exclusive or
Corresponding N number of primary election data are ceased, and the object identifier code of each primary election data is calculated according to assignment algorithm；Determine and former check code
The corresponding primary election data of consistent object identifier code determine to select data with consistent with former check code eventually to select data eventually
Location is target position information in the total data of check code；Determine the target position information consistent with original position information
It is initial data that corresponding end, which selects data,.Compared with prior art, in the application when the specified data read have mistake,
N number of primary election data are obtained using former exclusive or information corresponding with initial data, and then determine that the original of identifying code and initial data is tested
The matched primary election data of card code finally determine the whole choosing of the original position information matches of positional information and initial data to select data eventually
Data are initial data, thus, no matter specify that to occur the digit of mistake in data be several, can be based on former exclusive or information,
Former check code and original position information determines correct initial data, by it is this by above- mentioned information be back-calculated to obtain correctly it is original
The error correcting system of data, ensure that data reliability, solve the technical side that the data that the prior art stores RAM carry out error correction
The problem of reliability is relatively low present in case.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow chart of data reconstruction method provided in an embodiment of the present invention；
Fig. 2 is the triggering stream that step S11 to step S14 is performed in a kind of data reconstruction method provided in an embodiment of the present invention
Cheng Tu；
Fig. 3 is a kind of structure diagram of Data Recapture Unit provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 1, it illustrates a kind of flow chart of data reconstruction method provided in an embodiment of the present invention, can include
Following steps：
S11：If by specifying the specified data that read of region there are mistake, read in advance by initial data store to
Former exclusive or information that exclusive or obtains is carried out when specifying region to the specific bit of the initial data, according to assignment algorithm to the original number
According to the former check code and the initial data being calculated in the total data with the check code consistent with former check code
The original position information of present position.
Wherein, initial data and specified data are the data corresponded, i.e. initial data is to store to specified region
Data, and it is by specifying the data in the reading of region to specify data, in other words, if specifying data that mistake is not present, is specified
Data i.e. initial data.In addition, also there is the another way-data backup for ensureing data reliability in the prior art,
I.e. when mistake occur in the data of storage, by recovering the mode of corresponding data in the data that back up, and given birth to by ECC check algorithm
Into check code determine the correspondences of data, still, this mode needs the area for increasing considerably chip to be used to store number
According to backup, and in the above-mentioned technical proposal that the application provides, the former exclusive or information of acquisition, former check code, original position information and
The digit of initial data and digit less than initial data and former check code and twice, accordingly, with respect to above-mentioned data backup
Mode, the technical solution that the application provides can be reduced to a certain extent needs increased chip area, reduces chip
Manufacture cost.
S12：Generation N number of primary election data corresponding with former exclusive or information, and calculate each primary election data according to assignment algorithm
Object identifier code.
Generation N number of primary election data corresponding with former exclusive or information are to retrodict out that it can be specified according to former exclusive or information
Position obtains the total data of former exclusive or information after carrying out exclusive or, i.e. and the digit of former exclusive or information is less than the digit of initial data, because
This, a former exclusive or information can correspond to multiple data.
S13：The corresponding primary election data of the object identifier code consistent with former check code are determined to select data eventually, and determine to select eventually
Data location in the total data with the check code consistent with former check code is target position information.
The digit of former check code is less than the digit of initial data, and therefore, a former check code can correspond to multiple data, also because
This, the corresponding primary election data of the object identifier code consistent with former check code determined may be multiple.
S14：It is initial data to determine that consistent with original position information target position information corresponding end selects data.
The data with same position are identical certainly in the data pool formed with the data of same check code,
Therefore, efficiently and accurately initial data can be recovered by above-mentioned steps.
In the application when the specified data read have mistake, obtained using former exclusive or information corresponding with initial data
To N number of primary election data, and then determine that the matched primary election data of former identifying code of identifying code and initial data select data to be whole, finally
It is initial data to determine that the end of the original position information matches of positional information and initial data selects data, thus, no matter specifies data
The middle digit for mistake occur is several, can be based on former exclusive or information, former check code and original position information and determine correctly
Initial data, by this error correcting system that correct initial data is back-calculated to obtain by above- mentioned information, realizes any error number
According to it is complete repair, ensure that data reliability, solve the technical side that the data that the prior art stores RAM carry out error correction
The problem of reliability is relatively low present in case, further increases the reliability, availability, processor and chip reliability of RAM.
In a kind of data reconstruction method that above-described embodiment provides, the specific bit progress exclusive or to initial data obtains former different
Or information, it can include：
Exclusive or is carried out to two bits adjacent in initial data, obtains its length equal to the half of initial data length
Former exclusive or information.
It should be noted that when positioning progress exclusive or to initial data middle finger, specific bit can be carried out according to being actually needed
Determine, such as first and last position, second and penultimate, and so on, can also be only right according to being actually needed
Partial data position in initial data carries out exclusive or, within protection scope of the present invention.Preferably, can be in initial data
Adjacent two bits carry out exclusive or, such as the initial data for 8, and first and second carried out exclusive or, the 3rd with
4th progress exclusive or, the 5th and the 6th progress exclusive or, the 7th and the 8th progress exclusive or, and the number that exclusive or is obtained
According to being arranged in order, the former exclusive or information of composition 4 is at this time, counter to former exclusive or information to be pushed away, and can obtain 24 power numbers
According to.And the algorithm of exclusive or is：If a, two values of b differ, exclusive or
As a result it is 1, if two values of a, b are identical, exclusive or result is 0., can be by original after the former exclusive or information of initial data is obtained
Exclusive or information is stored to correspondence position, for reading.
And initial data is carried out according to assignment algorithm former check code is calculated, it can include：
Initial data is calculated using ECC check algorithm, obtains former check code.
Wherein, ECC check algorithm is classic algorithm of the prior art, and details are not described herein.Pass through ECC check algorithm
Initial data is calculated, corresponding former check code is can obtain, such as the data of 8 is calculated, can obtain the verification of 5
Code, data bits often double, and verification code bit number only increases by one, i.e., the data of 16 is calculated, and can obtain 6
Check code, and so on.After the former check code of initial data is obtained, former check code can together be write with initial data
In RAM, for reading.
In addition, determining the positional information of initial data can include：
Total data with the check code consistent with former check code is ranked up according to default rule, obtains data sequence
Row, and determine that initial data location in data sequence is original position information.
Since the digit of former check code is less than the digit of initial data, a former check code can correspond to multiple data,
When such as initial data being 8, the check code of 5 can correspond to 28/25A data, and initial data is only one of them, therefore it is right
These data can be according to the size of data or randomly ordered etc., form data sequence, really according to default rule
It is original position information to determine position of the initial data in data sequence, and the digit of original position information is related to the number of data, when
When the number of data is not more than 10, the digit of original position information only needs 1, when the number of data is more than 10, original position
The digit of information needs 2, and so on.As initial data be 8 when, its original position information be 1, initial data be 16
When, its positional information is 2.After original position information is obtained, original position information can be stored to correspondence position, for reading.
In a kind of data reconstruction method that above-described embodiment provides, as shown in Fig. 2, can also comprise the following steps：
S21：Specified data are read in region by specifying, and judges to specify in data using ECC check algorithm and whether deposits
In bit error, if it is, step S22 is performed, if it is not, then performing step S23.
It whether there is misplaced data position it should be noted that judging to specify in data using ECC check algorithm as existing skill
Classical way in art, details are not described herein.
S22：Whether misjudgment data bit is 1, if it is, step S24 is performed, if it is not, then performing step
S25。
S23：Determine that specified data are correct initial data.
S24：Initial data is obtained according to ECC check algorithm.
Since ECC check algorithm can carry out error correction to the data dislocation of 1, when judging to specify in data, there are 1
During the error in data position of position, i.e., the mistake is repairable mistake, only needs to carry out error correction i.e. to it using ECC check algorithm at this time
Can, it is classical way of the prior art as the process using ECC check algorithm 1 data error correction of progress, herein not
Repeat again.
S25：Obtain former exclusive or information, former check code and original position information.
If specifying data bits wrong present in data to be more than 1, the i.e. not repairable mistake of the error bit, this
When, then need to obtain initial data using a kind of data reconstruction method provided in an embodiment of the present invention, thereby, it is possible to by ECC schools
Checking method is combined with a kind of data reconstruction method that the application provides, extensive using different schemes according to the difference of data bits
Multiple initial data, the complete recovery of initial data is realized on the basis of logical resource is saved, ensure that data reliability.
By taking the RAM of 8 bit wides as an example, a kind of implementation process of data reconstruction method provided in an embodiment of the present invention is introduced：
Write RAM operations：Using ECC check algorithm generation 5 originals check codes corresponding with 8 initial data, and by original
Beginning data and former check code are stored in RAM, and 4 corresponding with initial data former exclusive or are generated by the way of adjacent two exclusive or
Information, 1 original position information of initial data is determined using former check code, and former exclusive or information and original position information are stored in list
In only RAM；
Read RAM operations：The specified data in RAM are read, and judge that specified data whether there is using ECC check algorithm
Mistake, if it does not exist, then directly the specified data of acquisition are transmitted etc. with processing, if it is present misjudgment data
Digit, if 1, then directly recover initial data using ECC check algorithm, otherwise, then triggering obtain former exclusive or information,
Original position information and former check code, and recover initial data according to the such scheme disclosed in the present invention.
Corresponding with above method embodiment, the embodiment of the present invention additionally provides a kind of Data Recapture Unit, such as Fig. 3 institutes
Show, can include：
Read module 31, if for by specifying the specified data that region is read to read former exclusive or letter there are mistake
Breath, former check code and original position information；
Exclusive or module 32, carries out the specific bit of the initial data in advance storing initial data to during specified region
Exclusive or obtains former exclusive or information；
Check code module 33, in advance by initial data store to during specified region according to assignment algorithm to the original number
According to carrying out that former check code is calculated；
Position module 34, in advance storing initial data to specified region when determine the initial data with original
Location is original position information in the total data of the consistent check code of check code；
Generation module 35, for generating N number of primary election data corresponding with former exclusive or information, and calculates often according to assignment algorithm
The object identifier code of a primary election data；
First determining module 36, for determining that the corresponding primary election data of the object identifier code consistent with former check code are choosing eventually
Data, and determine that it is target position to select data location in the total data with the check code consistent with former check code eventually
Confidence ceases；
Second determining module 37, for determining that consistent with original position information target position information corresponding end selects the data to be
Initial data.
In the application when the specified data read have mistake, obtained using former exclusive or information corresponding with initial data
To N number of primary election data, and then determine that the matched primary election data of former identifying code of identifying code and initial data select data to be whole, finally
It is initial data to determine that the end of the original position information matches of positional information and initial data selects data, thus, no matter specifies data
The middle digit for mistake occur is several, can be based on former exclusive or information, former check code and original position information and determine correctly
Initial data, by this error correcting system that correct initial data is back-calculated to obtain by above- mentioned information, realizes any error number
According to it is complete repair, ensure that data reliability, solve the technical side that the data that the prior art stores RAM carry out error correction
The problem of reliability is relatively low present in case, further increases the reliability, availability, processor and chip reliability of RAM.
In addition, the information that exclusive or module and position module obtain can be deposited into information storage module, also, different moulds
Block can be integrated into same module, as generation module, the first determining module and the second determining module can be integrated into same module, that is, repair
Multiple logic module, is not specifically limited in of the invention.
In a kind of data recovery module that above-described embodiment provides, exclusive or module can include：
Exclusive or unit, for carrying out exclusive or to two bits adjacent in initial data, obtains its length and is equal to original number
According to the former exclusive or information of the half of length.
In a kind of data recovery module that above-described embodiment provides, check code module can include：
Check code unit, for being calculated using ECC check algorithm initial data, obtains former check code.
In a kind of data recovery module that above-described embodiment provides, position module can include：
Position units, for the total data with the check code consistent with former check code to be arranged according to its length
Sequence, obtains data sequence, and determines that initial data location in data sequence is original position information.
In a kind of data recovery module that above-described embodiment provides, it can also include：
Acquisition module is triggered, for reading specified data in region by specifying, and judges to specify using ECC check algorithm
It whether there is bit error in data, if it is, whether misjudgment data bit is 1, if misplaced data position is 1
Position, then obtain initial data according to ECC check algorithm, if bit error is not 1, obtains former exclusive or information, former school
Test code and original position information.
Since a kind of data reconstruction method provided in an embodiment of the present invention and a kind of data provided in an embodiment of the present invention are extensive
Apparatus for coating is corresponding, and therefore, the explanation of related content is referred in corresponding in above method embodiment in above device embodiment
The explanation of appearance, details are not described herein.
The foregoing description of the disclosed embodiments, enables those skilled in the art to realize or use the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and the general principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited
The embodiments shown herein is formed on, and is to fit to consistent with the principles and novel features disclosed herein most wide
Scope.
Claims (10)
- A kind of 1. data reconstruction method, it is characterised in that including：If by specifying the specified data that region is read to read there are mistake and in advance store initial data to specified region When former exclusive or information that exclusive or obtains is carried out to the specific bit of the initial data, the initial data is counted according to assignment algorithm Obtained former check code and the initial data is residing in the total data with the check code consistent with the former check code The original position information of position；Generation N number of primary election data corresponding with the original exclusive or information, and calculate each primary election data according to the assignment algorithm Object identifier code；The corresponding primary election data of the object identifier code consistent with the former check code are determined to select data eventually, and determine described to select eventually Data location in the total data with the check code consistent with the former check code is target position information；It is initial data to determine that consistent with original position information target position information corresponding end selects data.
- 2. according to the method described in claim 1, it is characterized in that, the specific bit progress exclusive or to the initial data obtains original Exclusive or information, including：Exclusive or is carried out to two bits adjacent in the initial data, obtains its length is equal to the initial data length one Half former exclusive or information.
- 3. according to the method described in claim 2, it is characterized in that, the initial data calculate according to assignment algorithm To former check code, including：The initial data is calculated using ECC check algorithm, obtains the former check code.
- 4. according to the method described in claim 3, it is characterized in that, determining the original position information of the initial data includes：Total data with the check code consistent with the former check code is ranked up according to default rule, obtains data sequence Row, and determine that initial data location in the data sequence is the original position information.
- 5. method according to any one of claims 1 to 4, it is characterised in that further include：Judge whether deposited in the specified data by reading specified data in the specified region, and using ECC check algorithm In bit error, if it is, judge whether the bit error is 1, if the bit error is 1, Initial data is obtained according to the ECC check algorithm, if the bit error is not 1, obtains the former exclusive or letter Breath, former check code and original position information.
- A kind of 6. Data Recapture Unit, it is characterised in that including：Read module, if for by specifying the specified data that region is read to read former exclusive or information, former school there are mistake Test code and original position information；Exclusive or module, obtains in advance storing initial data to specific bit progress exclusive or during specified region to the initial data To former exclusive or information；Check code module, carries out the initial data according to assignment algorithm in advance storing initial data to during specified region Former check code is calculated；Position module, in advance storing initial data to specified region when determine the initial data with the former school It is original position information to test location in the total data of the consistent check code of code；Generation module, for generating N number of primary election data corresponding with the original exclusive or information, and calculates according to the assignment algorithm The object identifier code of each primary election data；First determining module, for determining that the corresponding primary election data of the object identifier code consistent with the former check code select number for end According to, and determine that the end selects the data to be the location of in the total data with the check code consistent with the former check code Target position information；Second determining module, for determining that consistent with original position information target position information corresponding end selects data to be former Beginning data.
- 7. device according to claim 6, it is characterised in that exclusive or module includes：Exclusive or unit, for carrying out exclusive or to two bits adjacent in the initial data, obtains its length and is equal to the original The former exclusive or information of the half of beginning data length.
- 8. device according to claim 7, it is characterised in that check code module includes：Check code unit, for being calculated using ECC check algorithm the initial data, obtains the former check code.
- 9. device according to claim 8, it is characterised in that position module includes：Position units, for the total data with the check code consistent with the former check code to be arranged according to default rule Sequence, obtains data sequence, and determines that initial data location in the data sequence is the original position information.
- 10. according to claim 6 to 9 any one of them device, it is characterised in that further include：Acquisition module is triggered, for by reading specified data in the specified region, and described in judging using ECC check algorithm Specify in data and whether there is bit error, if it is, judging whether the bit error is 1, if the mistake Data bit is 1 by mistake, then obtains initial data according to the ECC check algorithm, if the bit error is not 1, Obtain former exclusive or information, former check code and the original position information.
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| CN114721867A (en) * | 2022-02-14 | 2022-07-08 | 阿里巴巴（中国）有限公司 | Data verification method and system |
| CN114756404B (en) * | 2022-06-15 | 2024-04-05 | 上海江波龙数字技术有限公司 | Data processing method, device, electronic equipment and storage medium |
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