CN103955432B - The method and device of data storage - Google Patents
The method and device of data storage Download PDFInfo
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Abstract
The invention discloses a kind of method of data storage, the method comprising the steps of：When detecting and receiving data write instruction, data write instruction according to receiving determines the logical page address of the data to be written and the number of pages of the data to be written, and corresponding physical page address is determined for each logical page address of the data to be written, the data to be written include many logical page datas and single logical page data；It is stored in the logical page address of determination, physical page address and number of pages as a mapping item association in record block mapping table.The invention also discloses a kind of device of data storage, it is prevented effectively from and creates a mapping item for every page data storage, save spatial cache, and then save the cost of manufacture of NandFlash storage devices.
Description
Technical field
The present invention relates to the method and device in flash memory technology field, more particularly to data storage.
Background technology
A kind of NandFlash (flash memory), storage medium is made up of multiple physical blocks, and each physical block includes multiple things again
Page is managed, the write-in of data is in units of page, and the Physical Page of written data can not be repeatedly written, and only enters in the data to write-in
Data can be just write again after row erasing, and carrying out erasing to write-in data is wiped in units of block.In NandFlash
In storage device, the physical block for writing full data is referred to as data block, and the physical block used is record block, and for raising property
Can, record block is usually provided with multiple.NandFlash storage devices include FTL (Flash Translation Layer, flash memory
Conversion layer) module, the FTL modules are used to carry out the conversion between logical page address and physical page address, and drive hardware to transmit
Data.NandFlash storage devices also include SRAM (SRAM), for data cached, the data of sram cache
Middle containment mapping table, the i.e. transformational relation of logical page address and physical page address.Mapping table is divided into main mapping table and record block again
Mapping table, wherein, what main mapping table was stored is in the mapping relations in data block, main mapping table fragmented storage to Flash.Record
What block mapping table was stored is the mapping relations of record block, is stored in record block, and after record block is write completely, this writes full record block
Switch to data block, and preserved record block mapping table as main mapping table.
In the prior art, the process of NandFlash storage devices data write-in is：When receiving data write instruction,
The logical page address of the data write instruction is first determined, is that the write-in of the data determines Physical Page and thing in a physical block
Page address is managed, the data are write on the Physical Page determined, and stores in record block mapping table the mapping of the data and is closed
System, that is, store the logical page address of the data and the transformational relation of physical page address, the logical page address and Physical Page of storage
Address is referred to as the mapping of mapping relations., it is necessary to be each physical block correspondence in the write-in of NandFlash storage devices data
The mapping of distribution quantity identical with the physical block number of physical pages, i.e. often store page of data and be accomplished by one mapping item of increase.
In above-mentioned NandFlash storage devices data writing mode, in the data write-in for having a large amount of numbers of pages, it is necessary to more record
Block mapping table stores the mapping relations of data to be written, so will significantly take the space of NandFlash storage devices caching,
In order to improve the performance of NandFlash storage devices, it is desirable to provide more spatial caches, can so NandFlash be caused to deposit
The cost of manufacture increase of storage device.
The above is only used for auxiliary and understands technical scheme, does not represent and recognizes that the above is existing skill
Art.
The content of the invention
The main object of the present invention is the method and device for providing data storage, it is intended to realizes and saves spatial cache, and then
Save the cost of manufacture of NandFlash storage devices.
To achieve the above object, the present invention provides a kind of method of data storage, and the method comprising the steps of：
When detecting and receiving data write instruction, the number to be written is determined according to the data write instruction received
According to logical page address and the data to be written number of pages, and for the data to be written each logical page address determine pair
The physical page address answered, the data to be written include many logical page datas and single logical page data；
Record block mapping is stored in using the logical page address of determination, physical page address and number of pages as a mapping item association
In table.
Preferably, this method also includes step：
When detecting and receiving data write instruction, analyse whether to preserve and continuously counted with the data to be written
According to；
When preserving with the continuous data of the data to be written, according to being obtained the data write instruction received
The number of pages of data to be written, and according to obtained number of pages, update the mapping with the continuous data of data to be written.
Preferably, it is described when preserving with the continuous data of data to be written, according to the data write instruction received
The number of pages of the data to be written is obtained, and is updated and the mapping item of the continuous data of data to be written according to obtained number of pages
Step includes：
When preserving with the continuous data of data to be written, the Physical Page of acquisition and the continuous data of data to be written
Location, and analyze the continuous physical page address of the physical page address whether record block has and obtain；
When the record block has the continuous physical page address of physical page address with obtaining, write according to the data received
Enter the number of pages that instruction obtains the data to be written, and according to obtained number of pages, update and the continuous data of data to be written
Map item.
Preferably, this method also includes step：
When detecting and receiving data write instruction, the number to be written is determined according to the data write instruction received
According to logical page address, and determine corresponding physical page address for each logical page addresses of the data to be written, and analyze
Whether with the to be written mathematical logic page address consistent data are preserved；
When preserving the data consistent with the mathematical logic page address to be written, find out and patrolled with the data to be written
The consistent data correspondence mappings of page address are collected, and the mapping found out is updated according to the physical page address of determination.
Preferably, it is described when preserving the data consistent with the mathematical logic page address to be written, find out with it is described
The consistent data correspondence mappings of mathematical logic page address to be written, and the mapping found out is updated according to the physical page address of determination
The step of item, includes：
When preserving the data consistent with the mathematical logic page address to be written, analysis is patrolled with the data to be written
Collect whether the consistent data of page address are continuous data；
, will be with the data to be written when the data consistent with the mathematical logic page address to be written are continuous data
The consistent data of logical page address are split, and the mapping of the data after fractionation is updated；
The data consistent with the mathematical logic page address to be written be discrete date when, find out with it is described to be written
The consistent data correspondence mappings of mathematical logic page address, and the mapping found out is updated according to the physical page address of determination.
The present invention further provides a kind of device of data storage, the device includes：
Processing module, it is true according to the data write instruction received for when detecting and receiving data write instruction
The logical page address of the fixed data to be written and the number of pages of the data to be written, and patrolled for each of the data to be written
Collect page address and determine corresponding physical page address；
Relating module, for being protected the logical page address of determination, physical page address and number of pages as a mapping item association
It is stored in record block mapping table.
Preferably, the device also includes analysis module,
The analysis module, is treated for when detecting and receiving data write instruction, analysing whether to preserve with described
Write the continuous data of data；
The processing module, is additionally operable to when preserving with the continuous data of the data to be written, according to what is received
Data write instruction obtains the number of pages of the data to be written, and by relating module according to obtained number of pages, update with it is to be written
Enter the mapping of the continuous data of data.
Preferably, the processing module, is additionally operable to when preserving with the continuous data of data to be written, obtain with it is to be written
Enter the physical page address of the continuous data of data, and the Physical Page whether record block has and obtain is analyzed by analysis module
The continuous physical page address in address；
When the record block has the continuous physical page address of physical page address with obtaining, write according to the data received
Enter the number of pages that instruction obtains the data to be written, and by relating module according to obtained number of pages, update and data to be written
The mapping of continuous data.
Preferably, the processing module, is additionally operable to when detecting and receiving data write instruction, according to the number received
The logical page address of the data to be written is determined according to write instruction, and it is true for each logical page address of the data to be written
Fixed corresponding physical page address；
The analysis module, is additionally operable to analyse whether to preserve the number consistent with the mathematical logic page address to be written
According to；
The relating module, is additionally operable to, when preserving the data consistent with the mathematical logic page address to be written, look for
Go out the data correspondence mappings consistent with the mathematical logic page address to be written, and looked for according to the renewal of the physical page address of determination
The mapping gone out.
Preferably, the analysis module, is additionally operable to preserving the number consistent with the mathematical logic page address to be written
According to when, analyze whether data consistent with the mathematical logic page address to be written are continuous data；
The processing module, it is continuous data to be additionally operable in the data consistent with the mathematical logic page address to be written
When, the data consistent with the mathematical logic page address to be written are split, and by relating module to the data after fractionation
Mapping item is updated；
The relating module, it is discrete date to be additionally operable in the data consistent with the mathematical logic page address to be written
When, the data correspondence mappings consistent with the mathematical logic page address to be written are found out, and according to the physical page address of determination
Update the mapping found out.
Compared with the prior art, the present invention writes when detecting and receiving data write instruction according to the data received
Instruction determines the logical page address of the data to be written and the number of pages of the data to be written, and is the data to be written
Each logical page address determines corresponding physical page address, and the data to be written include many logical page datas and single logic number of pages
According to；It is stored in the logical page address of determination, physical page address and number of pages as a mapping item association in record block mapping table.
By will be preserved for the mapping relations of the data to be written of many logical page datas with a mapping item, it is prevented effectively to be each
Page data storage creates a mapping item, saves spatial cache, and then save the cost of manufacture of NandFlash storage devices.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the method first embodiment of data storage of the present invention；
Fig. 2 is the schematic flow sheet of the method second embodiment of data storage of the present invention；
The refinement schematic flow sheet that Fig. 3 is step S14 in Fig. 2；
Fig. 4 is the schematic flow sheet of the method 3rd embodiment of data storage of the present invention；
The refinement schematic flow sheet that Fig. 5 is step S16 in Fig. 4；
Fig. 6 is the high-level schematic functional block diagram of the device first embodiment of data storage of the present invention；
Fig. 7 is the high-level schematic functional block diagram of the device second embodiment of data storage of the present invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
As shown in figure 1, the schematic flow sheet of the method first embodiment for data storage of the present invention.
It is emphasized that：Flow chart shown in Fig. 1 is only a preferred embodiment, and those skilled in the art appoints when knowing
What should not all depart from the scope covered in following technical scheme around the embodiment that inventive concept is built：
When detecting and receiving data write instruction, the number to be written is determined according to the data write instruction received
According to logical page address and the data to be written number of pages, and for the data to be written each logical page address determine pair
The physical page address answered；Note is stored in using the logical page address of determination, physical page address and number of pages as a mapping item association
Record in block mapping table.
The specific steps of data storage are done step-by-step the following is the present embodiment：
Step S11, when detecting and receiving data write instruction, according to being determined the data write instruction received
The number of pages of the logical page address of data to be written and the data to be written, and with being each logical page (LPAGE) of the data to be written
Location determines corresponding physical page address, and the data to be written include many logical page datas and single logical page data；
Step S12, note is stored in using the logical page address of determination, physical page address and number of pages as a mapping item association
Record in block mapping table.
User sends data write instruction when needing data storage to storage device, and the data write instruction includes
But it is not limited to the number of pages of data to be written, the logical page address of data to be written, the size of data to be written and data to be written
Etc. information.The data to be written can include at least page of data, and each page data one logical page address of correspondence.Perform
The main body of the embodiment of the present invention can be NandFlash storage devices or memory control apparatus, in the present embodiment,
Preferably NandFlash storage devices (i.e. storage device).
Storage device obtains the relevant information of data to be written from the data write instruction received, i.e. according to reception
To data write instruction determine the logical page address of the data to be written and the number of pages of the data to be written, wherein, really
Fixed logical page address can write the logical page address of data, or last page write-in data for first page in the data
Logical page address.The data to be written include many logical page datas and single logical page data, i.e. many logical page datas are many
Page data, single logical page data is single page data.The storage device determines for described each logical page address of data to be written
Corresponding physical page address, equally, it is determined that physical page address can be the data in first page write data Physical Page
Address, or last page write the physical page address of data, and the physical page address determined also includes its attribute-bit, i.e.
Including the mark for the Physical Page for belonging to which record block.When the data to be written are single logical page data, the storage
Equipment is that the mathematical logic page address to be written determines corresponding physical page address.The storage device is by the logical page (LPAGE) of determination
Address, physical page address and number of pages are stored in record block mapping table as a mapping item association, will be the in the data
The logical page address of one page write-in data, physical page address are associated with the number of pages determined and are stored in record block mapping table, or
It is used as one to map item the logical page address of last page write-in data, physical page address in the data and the number of pages determined
Association is stored in record block mapping table.The mapping of each record block data storage is maintained in one in the storage device
In record block mapping table, when the record block of the mapping table writes full, unloading is main mapping table；Or, write data in record block
When writing full, the record block unloading is data block, and is preserved record block mapping table as main mapping table.
When detecting and receiving data read command, the storage device is obtained according to the data read command received
The logical page address of data to be read, when record block mapping table finds out the logical page address of data to be read of acquisition, from note
The corresponding physical page address of the data to be read is found out in record block mapping table, the storage device drives hardware in the thing found out
Manage the corresponding Physical Page of page address and read corresponding data, and the data of reading are sent to the purpose that data read command is pointed to
End, or shown on the display device being connected with the memory device communication.
Below by way of a specific embodiment, the present invention will be described, reference table 1, and data to be written include 4 numbers of pages
According to the corresponding logical page address of every page is as shown in table 1, when user needs to be stored the data to be written, to storage
Equipment sends data write instruction, and the storage device is when receiving the data write instruction that user sends, according to receiving
Data write instruction determine the logical page address of the data to be written and the number of pages of the data to be written, and treated to be described
Each logical page address of write-in data determines corresponding physical page address, the data to be written include many logical page datas and
Single logical page data, as shown in table 1, the data to be written are many logical page datas, and the logic of the data first page to be written
Page address is 0x00000001, and number of pages is page 4, for the physical page address of the first page logical page address determination of the data to be written
For 0x00001000, the logical page address of the data second page to be written is 0x00000002, for the second of the data to be written
The physical page address that page logical page address is determined is 0x00001001, by that analogy, confirms that page three of the data to be written is patrolled
It is respectively 0x00001002 and 0x00001003 to collect page address and the corresponding physical page address of logical page address of page four.Reference table
2, it is stored in the logical page address of determination, physical page address and number of pages as a mapping item association in record block mapping table,
Each logical page address is recorded with physical page address as the mode of a mapping item record for clock-wise order, i.e. reflected at this
The logical page address and physical page address penetrated in item is the logical page address of the first page data and the Physical Page of the first page data
Location, since the logical page address 0x00000001 of the first page data, four page datas of Coutinuous store to physical page address
The position that 0x00001001 starts；If each logical page address is inverse as the mode of a mapping item record with physical page address
Clocking sequence is recorded, then reference table 3, logical page address and physical page address the patrolling for last page data in the mapping
Collect the physical page address of page address and last page data, i.e. the logical page address 0x00000004 from last page data is inverse
Hour hands start, the position that four page datas of Coutinuous store terminate to the physical page address 0x00001003 of last page data.Ginseng
Table 4 is examined, the data to be written are single logical page data, i.e. the only page of data to be written.The logical page (LPAGE) of the data to be written
Address is 0x00000008, and number of pages is page 1, and the physical page address for the logical page address determination of the data to be written is
0x00001009, reference table 5 is preserved the logical page address of determination, physical page address and number of pages as a mapping item association
In record block mapping table.
| Number of pages | Logical page address |
| First page | 0x00000001 |
| Second page | 0x00000002 |
| Page three | 0x00000003 |
| Page four | 0x00000004 |
Table 1
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000001 | 0x00001000 | 4 |
Table 2
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000004 | 0x00001003 | 4 |
Table 3
| Number of pages | Logical page address |
| 1 | 0x00000008 |
Table 4
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000008 | 0x00001009 | 1 |
Table 5
When detecting and receiving data read command, the storage device determines the logical page address of data to be read,
Reference table 2, if the logical page address of the data to be read is 0x00000001, its corresponding physical page address is
0x00001000, reads the data to be read, and the data of reading are sent in the corresponding Physical Page of the physical page address
The destination pointed to data read command, or shown on the display device being connected with the memory device communication；If described
The logical page address of data to be read is 0x00000002, then its corresponding physical page address is 0x00001001, in the physics
The data to be read are read in the corresponding Physical Page of page address, and the data of reading are sent to data read command sensing
Destination, or shown on the display device being connected with the memory device communication.
In the present embodiment when detecting and receiving data write instruction, institute is determined according to the data write instruction received
The logical page address of data to be written and the number of pages of the data to be written are stated, and is each logical page (LPAGE) of the data to be written
Address determines corresponding physical page address, and the data to be written include many logical page datas and single logical page data；It will determine
Logical page address, physical page address and number of pages as one mapping item association be stored in record block mapping table.By that will be
The mapping relations of the data to be written of many logical page datas are preserved with a mapping item, are prevented effectively from and are stored number for every page
According to a mapping item is created, spatial cache is saved, and then save the cost of manufacture of NandFlash storage devices.
As shown in Fig. 2 the schematic flow sheet of the method second embodiment for data storage of the present invention.
Based on above-mentioned first embodiment, this method also includes step：
Step S13, when detecting and receiving data write instruction, analyses whether to preserve continuous with data to be written
Data；
Step S14, when preserving with the continuous data of data to be written, is obtained according to the data write instruction received
The number of pages of the data to be written, and according to obtained number of pages, update the mapping with the continuous data of data to be written.
Reference table 6, the corresponding logical page address of data to be written is 0x00000005, as single logical page data, one page
Data, reference table 2 is the mapping table for having preserved data, and there is logical page address in the mapping table for having preserved data
0x00000004, analysis obtain preserving with the continuous data of data to be written, according to the data write instruction received
The number of pages of the data to be written is obtained, and according to obtained number of pages, updates the mapping with the continuous data of data to be written,
Mapping reference table 7 after renewal.
| Number of pages | Logical page address |
| 1 | 0x00000005 |
Table 6
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000001 | 0x00001000 | 5 |
Table 7
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000005 | 0x00001004 | 5 |
Reference table 3, is the mapping table for having preserved data, and in the mapping table for having preserved data with there is logical page (LPAGE)
Location 0x00000004, analysis obtain preserving with the continuous data of data to be written, obtained according to the data write instruction received
To the number of pages of the data to be written, and according to obtained number of pages, the mapping with the continuous data of data to be written is updated, more
Mapping reference table 8 after new.
In order to be able to which the data to be written more preferably, effectively are merged into preservation with having preserved data, spatial cache is saved
Purpose, with reference to Fig. 3, the step S14 includes：Step S1401, when preserving with the continuous data of data to be written, is obtained
With the physical page address of the continuous data of data to be written, and analyze the record block whether have with obtain physical page address connect
Continuous physical page address；Step S1402, when the record block has the continuous physical page address of physical page address with obtaining,
Data write instruction according to receiving obtains the number of pages of the data to be written, and according to obtained number of pages, update with it is to be written
Enter the mapping of the continuous data of data.
When the present embodiment is by preserving with the continuous data of the data to be written, be written into data with it is described
The continuous data of data to be written are continuously preserved, and by updating the page with the mapping item of the continuous data of data to be written
Number, that is, be written into the logical page address and physical page address of data, the logical page (LPAGE) with the continuous data of data to be written
Address associates preservation with physical page address as a mapping item, further saves spatial cache, reduction NandFlash storage dresses
The cost of manufacture put.
As shown in figure 4, the schematic flow sheet of the method 3rd embodiment for data storage of the present invention.
Based on above-mentioned first and second embodiment, this method also includes step：
Step S15, when detecting and receiving data write instruction, according to being determined the data write instruction received
The logical page address of data to be written, and for the data to be written each logical page address with determining corresponding Physical Page
Location, and analyse whether to preserve the data consistent with the mathematical logic page address to be written；
Step S16, when preserving the data consistent with the mathematical logic page address to be written, find out with it is described to be written
Enter the consistent data correspondence mappings of mathematical logic page address, and the mapping found out is updated according to the physical page address of determination.
Reference table 6, the corresponding logical page address of data to be written is 0x00000005, it is determined that physical page address be
0x00001007, reference table 9 has preserved the data for having that logical page address is 0x00000005 in data.According to the thing of determination
Reason page address updates the mapping found out, the mapping reference table 10 after renewal.
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000001 | 0x00001001 | 1 |
| 0x00000003 | 0x00001003 | 1 |
| 0x00000005 | 0x00001005 | 1 |
| 0x00000007 | 0x00001006 | 1 |
Table 9
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000001 | 0x00001001 | 1 |
| 0x00000003 | 0x00001003 | 1 |
| 0x00000005 | 0x00001007 | 1 |
| 0x00000007 | 0x00001006 | 1 |
Table 10
Further, in order to be able to more preferably, effectively be preserved continuous data, spatial cache is preferably saved, reduction
The cost of manufacture of NandFlash storage devices, with reference to Fig. 5, the step S16 includes：
Step S1601, when preserving the data consistent with the mathematical logic page address to be written, analysis is treated with described
Write whether the consistent data of mathematical logic page address are continuous data；
Step S1602, the data consistent with the mathematical logic page address to be written be continuous data when, will with it is described
The consistent data of mathematical logic page address to be written are split, and the mapping of the data after fractionation is updated；
Step S1603, the data consistent with the mathematical logic page address to be written be discrete date when, find out with
The consistent data correspondence mappings of the mathematical logic page address to be written, and update what is found out according to the physical page address of determination
Map item.
The storage device when preserving the data consistent with the mathematical logic page address to be written, analysis with it is described
Whether the consistent data of mathematical logic page address to be written are continuous data, consistent with the mathematical logic page address to be written
Data be continuous data when, the storage device is with determining the logical page (LPAGE) of the data to be written according to data write instruction
Location, analysis determine logical page address be inserted into the stem of the data consistent with the mathematical logic page address to be written, in
Between or afterbody.For example, reference table 6, the corresponding logical page address of data to be written is 0x00000005, it is determined that Physical Page
Location is 0x00001007, and consecutive numbering of pages is page 1.Reference table 11, is the data consistent with the mathematical logic page address to be written
Mapping, mapping relations are stored as the storage of logical page address clock-wise order, i.e., the logical page address of continuous data is
0x00000005-0x00000008, corresponding logical page address is respectively 0x00001000-0x00001003, data storage
Consecutive numbering of pages is page 4.The data consistent with the mathematical logic page address to be written be continuous data, and with the number to be written
According to the consistent data of logical page address in stem, the storage device is by the number consistent with the mathematical logic page address to be written
It is updated according to fractionation, and to the mapping of the data after fractionation, the record block mapping item reference table 12 after renewal.If with it is described
The data of storage are split as 3 parts by the consistent data of mathematical logic page address to be written in centre, reference table 13, i.e. will be patrolled
Collect page address and be split as 0x00000003-0x00000004,0x00000005 and 0x00000006, corresponding physical page address is torn open
It is divided into 0x00001000-0x00001001,0x00001002 and 0x00001003, consecutive numbering of pages corresponds to 2,1 and 1.And to tearing open
The mapping of data after point is updated, the record block mapping item reference table 14 after renewal.If being patrolled with the data to be written
The consistent data of page address are collected in afterbody, reference table 15 is reflecting for the data consistent with the mathematical logic page address to be written
Item is penetrated, mapping item is stored as the storage of logical page address clock-wise order, i.e., the logical page address of continuous data is
0x00000001-0x00000005, corresponding logical page address is respectively 0x00001000-0x00001004, data storage
Consecutive numbering of pages is page 4.The data consistent with the mathematical logic page address to be written are split, and reflecting to the data after fractionation
Penetrate item to be updated, the record block mapping item reference table 16 after renewal.
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000005 | 0x00001000 | 4 |
Table 11
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000006 | 0x00001001 | 3 |
| 0x00000005 | 0x00001007 | 1 |
Table 12
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000003 | 0x00001000 | 4 |
Table 13
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000003 | 0x00001000 | 2 |
| 0x00000005 | 0x00001007 | 1 |
| 0x00000006 | 0x00000003 | 1 |
Table 14
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000001 | 0x00001000 | 5 |
Table 15
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000001 | 0x00001000 | 4 |
| 0x00000005 | 0x00001007 | 1 |
Table 16
The storage device is when the data consistent with the mathematical logic page address to be written are discrete date, example
Such as, reference table 6, the corresponding logical page address of data to be written is 0x00000005, it is determined that physical page address be
0x00001007, consecutive numbering of pages is page 1.Reference table 17, is reflecting for the data consistent with the mathematical logic page address to be written
Item is penetrated, logical page address is 0x00000005, corresponding logical page address is respectively 0x00001000, consecutive numbering of pages is page 1, root
The mapping found out is updated according to the physical page address of determination, the mapping reference table 18 after renewal.It is described to update what is found out
Logical term includes operating the modification of logical term, the increase of logical page (LPAGE) and/or deletion of logical page (LPAGE) etc..
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000005 | 0x00001000 | 1 |
Table 17
| Logical page address | Physical page address | Consecutive numbering of pages |
| 0x00000005 | 0x00001007 | 1 |
Table 18
As shown in fig. 6, the high-level schematic functional block diagram of the device first embodiment for data storage of the present invention.The device bag
Include：Processing module 10 and relating module 20.
The processing module 10, for when detecting and receiving data write instruction, being write according to the data received
Instruction determines the logical page address of the data to be written and the number of pages of the data to be written, and is the data to be written
Each logical page address determines corresponding physical page address；
The relating module 20, for regarding the logical page address of determination, physical page address and number of pages as a mapping item
Association is stored in record block mapping table.
User sends data write instruction when needing data storage to storage device, and the data write instruction includes
But it is not limited to the number of pages of data to be written, the logical page address of data to be written, the size of data to be written and data to be written
Etc. information.The data to be written can include at least page of data, and each page data one logical page address of correspondence.
The storage device obtains the relevant information of data to be written from the data write instruction received, i.e. according to
The data write instruction received determines the logical page address of the data to be written and the number of pages of the data to be written, its
In, it is determined that logical page address can be first page writes data in the data logical page address, or last page writes
Enter the logical page address of data.The data to be written include many logical page datas and single logical page data, i.e. many logic numbers of pages
According to for many page datas, single logical page data is single page data.The storage device is each logical page (LPAGE) of data to be written
Location determines corresponding physical page address, equally, it is determined that physical page address can be first page write-in data in the data
Physical page address, or last page write the physical page address of data, and the physical page address determined also includes its attribute mark
Which know, i.e. including the mark for the Physical Page for belonging to record block.When the data to be written are single logical page data, institute
State storage device and determine corresponding physical page address for the mathematical logic page address to be written.The storage device is by determination
Logical page address, physical page address and number of pages are stored in record block mapping table as a mapping item association, will the number
Associated according to the logical page address of middle first page write-in data, physical page address with the number of pages determined and be stored in record block mapping table
In, or the number of pages that last page in the data is write into the logical page addresses of data, physical page address with determining is used as one
Individual mapping item association is stored in record block mapping table.The mapping Xiang Junbao of each record block data storage in the storage device
In the presence of in a record block mapping table, when the record block of the mapping table writes full, unloading is main mapping table；Or, in record block
When write-in data write full, the record block unloading is data block, and is preserved record block mapping table as main mapping table.
When detecting and receiving data read command, the storage device is obtained according to the data read command received
The logical page address of data to be read, when record block mapping table finds out the logical page address of data to be read of acquisition, from note
The corresponding physical page address of the data to be read is found out in record block mapping table, the storage device drives hardware in the thing found out
Manage the corresponding Physical Page of page address and read corresponding data, and the data of reading are sent to the purpose that data read command is pointed to
End, or shown on the display device being connected with the memory device communication.
Below by way of a specific embodiment, the present invention will be described, reference table 1, and data to be written include 4 numbers of pages
According to the corresponding logical page address of every page is as shown in table 1, when user needs to be stored the data to be written, to storage
Equipment sends data write instruction, and the storage device is when receiving the data write instruction that user sends, according to receiving
Data write instruction determine the logical page address of the data to be written and the number of pages of the data to be written, and treated to be described
Each logical page address of write-in data determines corresponding physical page address, the data to be written include many logical page datas and
Single logical page data, as shown in table 1, the data to be written are many logical page datas, and the logic of the data first page to be written
Page address is 0x00000001, and number of pages is page 4, for the physical page address of the first page logical page address determination of the data to be written
For 0x00001000, the logical page address of the data second page to be written is 0x00000002, for the second of the data to be written
The physical page address that page logical page address is determined is 0x00001001, by that analogy, confirms that page three of the data to be written is patrolled
It is respectively 0x00001002 and 0x00001003 to collect page address and the corresponding physical page address of logical page address of page four.Reference table
2, it is stored in the logical page address of determination, physical page address and number of pages as a mapping item association in record block mapping table,
Each logical page address is recorded with physical page address as the mode of a mapping item record for clock-wise order, i.e. reflected at this
The logical page address and physical page address penetrated in item is the logical page address of the first page data and the Physical Page of the first page data
Location, since the logical page address 0x00000001 of the first page data, four page datas of Coutinuous store to physical page address
The position that 0x00001001 starts；If each logical page address is inverse as the mode of a mapping item record with physical page address
Clocking sequence is recorded, then reference table 3, logical page address and physical page address the patrolling for last page data in the mapping
Collect the physical page address of page address and last page data, i.e. the logical page address 0x00000004 from last page data is inverse
Hour hands start, the position that four page datas of Coutinuous store terminate to the physical page address 0x00001003 of last page data.Ginseng
Table 4 is examined, the data to be written are single logical page data, i.e. the only page of data to be written.The logical page (LPAGE) of the data to be written
Address is 0x00000008, and number of pages is page 1, and the physical page address for the logical page address determination of the data to be written is
0x00001009, reference table 5 is preserved the logical page address of determination, physical page address and number of pages as a mapping item association
In record block mapping table.
When detecting and receiving data read command, the storage device determines the logical page address of data to be read,
Reference table 2, if the logical page address of the data to be read is 0x00000001, its corresponding physical page address is
0x00001000, reads the data to be read, and the data of reading are sent in the corresponding Physical Page of the physical page address
The destination pointed to data read command, or shown on the display device being connected with the memory device communication；If described
The logical page address of data to be read is 0x00000002, then its corresponding physical page address is 0x00001001, in the physics
The data to be read are read in the corresponding Physical Page of page address, and the data of reading are sent to data read command sensing
Destination, or shown on the display device being connected with the memory device communication.
In the present embodiment when detecting and receiving data write instruction, institute is determined according to the data write instruction received
The logical page address of data to be written and the number of pages of the data to be written are stated, and is each logical page (LPAGE) of the data to be written
Address determines corresponding physical page address, and the data to be written include many logical page datas and single logical page data；It will determine
Logical page address, physical page address and number of pages as one mapping item association be stored in record block mapping table.By that will be
The mapping relations of the data to be written of many logical page datas are preserved with a mapping item, are prevented effectively from and are stored number for every page
According to a mapping item is created, spatial cache is saved, and then save the cost of manufacture of NandFlash storage devices.
As shown in fig. 7, the high-level schematic functional block diagram of the device second embodiment for data storage of the present invention.The device is also wrapped
Include：Analysis module 30.
The analysis module 30, for when detecting and receiving data write instruction, analyse whether to preserve with it is to be written
Enter the continuous data of data；
The processing module 10, is additionally operable to when preserving with the continuous data of data to be written, according to the number received
Obtain the number of pages of the data to be written according to write instruction, and by relating module 20 according to obtained number of pages, update with it is to be written
Enter the mapping of the continuous data of data；
Reference table 6, the corresponding logical page address of data to be written is 0x00000005, as single logical page data, one page
Data, reference table 2 is the mapping table for having preserved data, and there is logical page address in the mapping table for having preserved data
0x00000004, analysis obtain preserving with the continuous data of data to be written, according to the data write instruction received
The number of pages of the data to be written is obtained, and according to obtained number of pages, updates the mapping with the continuous data of data to be written,
Mapping reference table 7 after renewal.
Reference table 3, is the mapping table for having preserved data, and in the mapping table for having preserved data with there is logical page (LPAGE)
Location 0x00000004, analysis obtain preserving with the continuous data of data to be written, obtained according to the data write instruction received
To the number of pages of the data to be written, and according to obtained number of pages, the mapping with the continuous data of data to be written is updated, more
Mapping reference table 8 after new.
In order to be able to which the data to be written more preferably, effectively are merged into preservation with having preserved data, spatial cache is saved
Purpose.
The processing module 10, is additionally operable to when preserving with the continuous data of data to be written, obtains and number to be written
Analyze whether the record block has Physical Page with obtaining according to the physical page address of continuous data, and by analysis module 30
The continuous physical page address in location；
When the record block has the continuous physical page address of physical page address with obtaining, write according to the data received
Enter the number of pages that instruction obtains the data to be written, and by relating module 20 according to obtained number of pages, update and number to be written
According to the mapping of continuous data.
When the present embodiment is by preserving with the continuous data of the data to be written, be written into data with it is described
The continuous data of data to be written are continuously preserved, and by updating the page with the mapping item of the continuous data of data to be written
Number, that is, be written into the logical page address and physical page address of data, the logical page (LPAGE) with the continuous data of data to be written
Address associates preservation with physical page address as a mapping item, further saves spatial cache, reduction NandFlash storage dresses
The cost of manufacture put.
Further, the processing module 10, is additionally operable to when detecting and receiving data write instruction, according to receiving
Data write instruction determine the logical page addresses of the data to be written, and be each logical page (LPAGE) of the data to be written
Location determines corresponding physical page address, and by analysis module 30 with analysing whether to preserve with the data logical pages to be written
The consistent data in location；
The relating module 20, is additionally operable to when preserving the data consistent with the mathematical logic page address to be written,
The data correspondence mappings consistent with the mathematical logic page address to be written are found out, and are updated according to the physical page address of determination
The mapping found out.
Reference table 6, the corresponding logical page address of data to be written is 0x00000005, it is determined that physical page address be
0x00001007, reference table 9 has preserved the data for having that logical page address is 0x00000005 in data.According to the thing of determination
Reason page address updates the mapping found out, the mapping reference table 10 after renewal.
Further, in order to be able to more preferably, effectively be preserved continuous data, spatial cache is preferably saved, reduction
The cost of manufacture of NandFlash storage devices.
The analysis module 30, is additionally operable to when preserving the data consistent with the mathematical logic page address to be written,
Whether the analysis data consistent with the mathematical logic page address to be written are continuous data；
The processing module 10, it is continuous data to be additionally operable in the data consistent with the mathematical logic page address to be written
When, the data consistent with the mathematical logic page address to be written are split, and pass through the data after 20 pairs of fractionations of relating module
Mapping be updated；
The relating module 20, it is discontinuous number to be additionally operable in the data consistent with the mathematical logic page address to be written
According to when, find out consistent with the mathematical logic page address to be written data correspondence mappings, and according to the Physical Page of determination
Location updates the mapping found out.
The storage device when preserving the data consistent with the mathematical logic page address to be written, analysis with it is described
Whether the consistent data of mathematical logic page address to be written are continuous data, consistent with the mathematical logic page address to be written
Data be continuous data when, the storage device is with determining the logical page (LPAGE) of the data to be written according to data write instruction
Location, analysis determine logical page address be inserted into the stem of the data consistent with the mathematical logic page address to be written, in
Between or afterbody.For example, reference table 6, the corresponding logical page address of data to be written is 0x00000005, it is determined that Physical Page
Location is 0x00001007, and consecutive numbering of pages is page 1.Reference table 11, is the data consistent with the mathematical logic page address to be written
Mapping, mapping relations are stored as the storage of logical page address clock-wise order, i.e., the logical page address of continuous data is
0x00000005-0x00000008, corresponding logical page address is respectively 0x00001000-0x00001003, data storage
Consecutive numbering of pages is page 4.The data consistent with the mathematical logic page address to be written be continuous data, and with the number to be written
According to the consistent data of logical page address in stem, the data consistent with the mathematical logic page address to be written are split, and it is right
The mapping of data after fractionation is updated, the record block mapping item reference table 12 after renewal.If with the data to be written
The data of storage are split as 3 parts, i.e. tear logical page address open by the consistent data of logical page address in centre, reference table 13
It is divided into 0x00000003-0x00000004,0x00000005 and 0x00000006, corresponding physical page address is split as
0x00001000-0x00001001,0x00001002 and 0x00001003, consecutive numbering of pages correspond to 2,1 and 1.And to fractionation after
The mappings of data be updated, the record block mapping item reference table 14 after renewal.If with the data logical pages to be written
The consistent data in address are in afterbody, and reference table 15 is the mapping of the data consistent with the mathematical logic page address to be written,
Mapping item is stored as the storage of logical page address clock-wise order, i.e., the logical page address of continuous data is 0x00000001-
0x00000005, corresponding logical page address is respectively 0x00001000-0x00001004, and the consecutive numbering of pages of data storage is 4
Page.The data consistent with the mathematical logic page address to be written are split, and the mapping of the data after fractionation is carried out more
Newly, the record block mapping item reference table 16 after renewal.
The storage device is when the data consistent with the mathematical logic page address to be written are discrete date, example
Such as, reference table 6, the corresponding logical page address of data to be written is 0x00000005, it is determined that physical page address be
0x00001007, consecutive numbering of pages is page 1.Reference table 17, is reflecting for the data consistent with the mathematical logic page address to be written
Item is penetrated, logical page address is 0x00000005, corresponding logical page address is respectively 0x00001000, consecutive numbering of pages is page 1, root
The mapping found out is updated according to the physical page address of determination, the mapping reference table 18 after renewal.It is described to update what is found out
Logical term includes operating the modification of logical term, the increase of logical page (LPAGE) and/or deletion of logical page (LPAGE) etc..
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.Embodiment party more than
The description of formula, it is required general that those skilled in the art can be understood that above-described embodiment method can add by software
The mode of hardware platform is realized, naturally it is also possible to by hardware, but the former is more preferably embodiment in many cases.It is based on
Such to understand, the part that technical scheme substantially contributes to prior art in other words can be with software product
Form embody, the computer software product is stored in a storage medium (such as internal memory/flash memory, magnetic disc, CD), bag
Some instructions are included to so that a station terminal equipment (can be mobile phone, computer, server, or network equipment etc.) performs sheet
Invent the method described in each embodiment.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of method of data storage, it is characterised in that the method comprising the steps of：
When detecting and receiving data write instruction, the data to be written are determined according to the data write instruction received
The number of pages of logical page address and the data to be written, and for the data to be written each logical page address determine it is corresponding
Physical page address, the data to be written include many logical page datas and single logical page data；
Record block mapping table is stored in using the logical page address of determination, physical page address and number of pages as a mapping item association
In；
The mapping of each record block data storage is maintained in a record block mapping table, is write in the record block of the mapping table
Man Shi, unloading is main mapping table；Or, when record block write-in data write full, the record block unloading is data block, and will record
Block mapping table is preserved as main mapping table.
2. the method for data storage as claimed in claim 1, it is characterised in that this method also includes step：
When detecting and receiving data write instruction, analyse whether to preserve and the continuous data of data to be written；
When preserving with the continuous data of the data to be written, obtain described to be written according to the data write instruction received
Enter the number of pages of data, and according to obtained number of pages, update the mapping with the continuous data of data to be written.
3. the method for data storage as claimed in claim 2, it is characterised in that described to preserve continuous with data to be written
Data when, the number of pages of the data to be written is obtained according to the data write instruction received, and according to obtained number of pages more
The step of newly mapping with the continuous data of data to be written, includes：
When preserving with the continuous data of data to be written, the physical page address with the continuous data of data to be written is obtained,
And analyze the continuous physical page address of the physical page address whether record block has and obtain；
When the record block has the continuous physical page address of physical page address with obtaining, referred to according to the data write-in received
So that to the number of pages of the data to be written, and according to obtained number of pages, update the mapping with the continuous data of data to be written
.
4. the method for data storage as claimed in claim 1 or 2, it is characterised in that this method also includes step：
When detecting and receiving data write instruction, the data to be written are determined according to the data write instruction received
Logical page address, and corresponding physical page address is determined for each logical page address of the data to be written, and analyse whether
Preserve the data consistent with the mathematical logic page address to be written；
When preserving the data consistent with the mathematical logic page address to be written, find out and the data logical pages to be written
The consistent data correspondence mappings in address, and the mapping found out is updated according to the physical page address of determination.
5. the method for data storage as claimed in claim 4, it is characterised in that described to preserve and the data to be written
During the consistent data of logical page address, the data correspondence mappings consistent with the mathematical logic page address to be written are found out, and
The step of updating the mapping found out according to the physical page address of determination includes：
When preserving the data consistent with the mathematical logic page address to be written, analysis and the data logical pages to be written
Whether the consistent data in address are continuous data；
, will be with the mathematical logic to be written when the data consistent with the mathematical logic page address to be written are continuous data
The consistent data of page address are split, and the mapping of the data after fractionation is updated；
When the data consistent with the mathematical logic page address to be written are discrete date, find out and the data to be written
The consistent data correspondence mappings of logical page address, and the mapping found out is updated according to the physical page address of determination.
6. a kind of device of data storage, it is characterised in that the device includes：
Processing module, for when detecting and receiving data write instruction, institute to be determined according to the data write instruction received
The logical page address of data to be written and the number of pages of the data to be written are stated, and is each logical page (LPAGE) of the data to be written
Address determines corresponding physical page address；
Relating module, for being stored in the logical page address of determination, physical page address and number of pages as a mapping item association
In record block mapping table；
The mapping of each record block data storage is maintained in a record block mapping table, is write in the record block of the mapping table
Man Shi, unloading is main mapping table；Or, when record block write-in data write full, the record block unloading is data block, and will record
Block mapping table is preserved as main mapping table.
7. the device of data storage as claimed in claim 6, it is characterised in that the device also includes analysis module,
The analysis module, for when detecting and receiving data write instruction, analyse whether to preserve with it is described to be written
The continuous data of data；
The processing module, is additionally operable to when preserving with the continuous data of the data to be written, according to the data received
Write instruction obtains the number of pages of the data to be written, and by relating module according to obtained number of pages, updates and number to be written
According to the mapping of continuous data.
8. the device of data storage as claimed in claim 7, it is characterised in that
The processing module, is additionally operable to when preserving with the continuous data of data to be written, obtains continuous with data to be written
Data physical page address, and by analysis module analyze the record block whether have with obtain physical page address it is continuous
Physical page address；
When the record block has the continuous physical page address of physical page address with obtaining, referred to according to the data write-in received
So that to the number of pages of the data to be written, and by relating module according to obtained number of pages, update continuous with data to be written
Data mapping.
9. the device of data storage as claimed in claim 7, it is characterised in that
The processing module, is additionally operable to when detecting and receiving data write instruction, according to the data write instruction received
The logical page address of the data to be written is determined, and corresponding thing is determined for each logical page address of the data to be written
Manage page address；
The analysis module, is additionally operable to analyse whether to preserve the data consistent with the mathematical logic page address to be written；
The relating module, is additionally operable to when preserving the data consistent with the mathematical logic page address to be written, find out with
The consistent data correspondence mappings of the mathematical logic page address to be written, and update what is found out according to the physical page address of determination
Map item.
10. the device of data storage as claimed in claim 9, it is characterised in that
The analysis module, is additionally operable to when preserving the data consistent with the mathematical logic page address to be written, analysis with
Whether the consistent data of the mathematical logic page address to be written are continuous data；
The processing module, is additionally operable to when the data consistent with the mathematical logic page address to be written are continuous data, will
The data consistent with the mathematical logic page address to be written are split, and the mapping by relating module to the data after fractionation
It is updated；
The relating module, is additionally operable to when the data consistent with the mathematical logic page address to be written are discrete date,
The data correspondence mappings consistent with the mathematical logic page address to be written are found out, and are updated according to the physical page address of determination
The mapping found out.
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| US9996473B2 (en) * | 2015-11-13 | 2018-06-12 | Samsung Electronics., Ltd | Selective underlying exposure storage mapping |
| CN105893272B (en) * | 2016-03-23 | 2019-03-15 | 北京联想核芯科技有限公司 | A kind of data processing method, processing equipment and storage system |
| CN107015764B (en) * | 2017-03-17 | 2020-03-27 | 深圳市江波龙电子股份有限公司 | Data processing method and device for Nand flash and Nand flash |
| CN110427285B (en) * | 2019-08-06 | 2023-05-09 | 北京中电华大电子设计有限责任公司 | High-performance smart card mirror image protection method |
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Effective date of registration: 20190620 Address after: 230000 Room 401, Block C, J1 Building, Phase II, Innovation Industrial Park, 2800 Innovation Avenue, Hefei High-tech Zone, Anhui Province Patentee after: Hefei Zhicun Microelectronics Co., Ltd. Address before: Units 05-2 and 06-08, Changhong Science and Technology Building, 18 Science and Technology South 12 Road, Nanshan District, Shenzhen City, Guangdong Province, 518057 Patentee before: Shenzhen SiliconGo Semiconductor Co., Ltd. |