CN111736760B - 一种动态随机存储方法及系统 - Google Patents

一种动态随机存储方法及系统 Download PDF

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CN111736760B
CN111736760B CN202010392926.5A CN202010392926A CN111736760B CN 111736760 B CN111736760 B CN 111736760B CN 202010392926 A CN202010392926 A CN 202010392926A CN 111736760 B CN111736760 B CN 111736760B
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CN111736760A (zh
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汤云平
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Rockchip Electronics Co Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601Interfaces specially adapted for storage systems
    • G06F3/0602Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/0604Improving or facilitating administration, e.g. storage management
    • G06F3/0607Improving or facilitating administration, e.g. storage management by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1008Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices
    • G06F11/1068Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices in sector programmable memories, e.g. flash disk
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601Interfaces specially adapted for storage systems
    • G06F3/0628Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0655Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
    • G06F3/0658Controller construction arrangements
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601Interfaces specially adapted for storage systems
    • G06F3/0668Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671In-line storage system
    • G06F3/0673Single storage device
    • G06F3/0679Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]

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Abstract

一种动态随机存储方法及系统,其中包括如下步骤,当芯片的DDR控制器发出单笔burst读数据请求时,返回每组32bit,共8组数据;控制ECC纠错码按照每两组32bit合并纠错一次生成纠错码,单笔burst读数据请求返回4组纠错码。通过上述方案控制burst存储过程中每64bit生成一次纠错码,能够使得原生数据与纠错码的空间占用比例提高到8比1,从而达到了提高DRAM存储空间的技术效果。

Description

一种动态随机存储方法及系统
技术领域
本发明涉及动态存储技术领域,尤其涉及一种能够减少纠错码占用的动态存储方式。
背景技术
动态随机存储器(DRAM)的数据单元可能受各类因素影响,导致数据位出错,进而影响系统的稳定性。为了解决类似问题,需要引入纠错机制,目前技术采用的是ECC纠错。ECC是“Error Correcting Code”的简写,ECC是一种能够实现“错误检查和纠正”的技术,ECC内存就是应用了这种技术的内存,一般多应用在服务器及图形工作站上,可提高计算机运行的稳定性和增加可靠性。对于ECC*纠错算法,每32bit的数据就需要额外占用7bit的数据单元来保存,每64bit的数据就需要额外占用8bit的数据单元来保存,以此类推。这将导致实际DDR可用容量下降,性价比较低。并且为了不影响DDR的带宽,ECC纠错码都需要额外IO进行传输,这增加了芯片成本以及客户板级设计的难度。
发明内容
为此,需要提供一种新的适配burst存储的存储及纠错方法,能够达到提高有效数据存储空间的技术效果;
为实现上述目的,发明人提供了一种动态随机存储方法,包括如下步骤,当芯片的DDR控制器发出burst读数据请求时,返回每组32bit,共8组数据;控制ECC纠错码按照每两组32bit合并纠错一次生成纠错码,每一个时钟周期内的burst读数据请求返回4组纠错码。
具体地,每次纠错码等分成两份短码,分别随两组的32bit数据返回。
一种动态随机存储系统,包括DDR控制器模块、返回模块、纠错模块,所述DDR控制器模块用于发出burst读数据请求,所述返回模块用于返回每组32bit,共8组数据,所述纠错模块用于按照每两组32bit合并纠错一次生成纠错码,每一个时钟周期内的burst读数据请求返回4组纠错码。
具体地,所述纠错模块还用于将每次的纠错码等分成两份短码,分别随两组的32bit数据返回。
具体地,还包括主控芯片,所述主控芯片包括32个数据IO接口和4个纠错码IO接口,所述数据IO接口和纠错码IO接口分别用于接收同时返回的数据和纠错码,并将数据和纠错码分别存储。
通过上述方案控制burst存储过程中每64bit生成一次纠错码,能够使得原生数据与纠错码的空间占用比例提高到8比1,从而达到了提高DRAM存储空间的技术效果。
附图说明
图1为本发明一实施方式所述的动态随机存储方法流程图;
图2为本发明一实施方式所述的动态随机存储系统模块图;
图3为本发明一实施方式所述的主控芯片连接图。
具体实施方式
为详细说明技术方案的技术内容、构造特征、所实现目的及效果,以下结合具体实施例并配合附图详予说明。
在通过主控芯片向DRAM颗粒通过burst模式读取数据的领域,通行做法是每个时钟周期内burst读数据是按照32bit*8来获取数据,同时需要对应生成8组7bit的ecc纠错码,获取到的数据和ecc纠错码需要存储在不同的内存颗粒,因此需要通过不同的IO接口来保证同时传输。我们的发明人发现在这种模式下,获取到的数据占用主控芯片中的32根IO线,ecc纠错码的传输需要占7根,由于DRAM颗粒没有奇数IO的,为了与常规装置适配,必须要占用8根IO接口,只不过第8根不接入数据。这些常规设置都是为了适配burst的数据吞吐,已经形成了一种技术偏见。这种设置下主控芯片总IO是40根或39根。则数据与纠错码的接口占用比值达到了4:1。对于数据来说,如果为了得到4Gb的有效寻址容量,则纠错码的存储容量则能够达到1G的容量。
为此,这里请参阅图1,为本发明一种动态随机存储方法,包括如下步骤,S100当芯片的DDR控制器发出单笔burst读数据请求时,返回每组32bit,共8组数据;控制ECC纠错码按照每两组32bit合并纠错一次生成纠错码,单笔burst读数据请求返回4组纠错码。通过设计burst数据读取中两个32bit对应生成一次纠错码,可以相当于32bit对应的纠错码只有4bit。因此将数据与纠错码的数据容量占比提高到了8:1。在一些具体的实施例中,还进行步骤,S102将每次纠错码等分成两份短码,分别随两组的32bit数据返回。即每次返回的纠错码只有4bit。当然需要注意,4bit的ecc并不能用于校验32bit数据,我们在校验环节还可以进行步骤,S104将关联的两个4bit的ecc纠错码合并为8bit纠错码,来校验关联的两笔32bit组成的64bit数据。这样主控芯片上的IO管脚设计中,数据仍然占用32跟的IO线,但是纠错码的IO管脚只需要占用到4根。这种控制逻辑下,相当于节省了4根的IO管脚。降低了芯片板上排布设计的难度,可以缩小芯片尺寸,并节省存储数据的DRAM颗粒所需贴片的容量。
综上,请看图2我们还提供一种动态随机存储系统,包括DDR控制器模块200、返回模块202、纠错模块204,所述DDR控制器模块用于发出单笔burst读数据请求,所述返货模块用于返回每组32bit,共8组数据,所述纠错模块用于按照每两组32bit合并纠错一次生成纠错码,单笔burst读数据请求返回4组纠错码。
具体地,所述纠错模块还用于将每次的纠错码等分成两份短码,分别随两组的32bit数据返回。
具体如图3所示的实施例中,还包括主控芯片SOC,我们可以看到主控芯片与数据存储器DRAM1和ECC寄存器DRAM2连接。所述主控芯片包括32个数据IO接口和4个纠错码IO接口,所述数据IO接口和纠错码IO接口分别与DRAM1和DRAM2连接,用于接收同时返回的数据和纠错码,并将数据和纠错码分别存储。
需要说明的是,尽管在本文中已经对上述各实施例进行了描述,但并非因此限制本发明的专利保护范围。因此,基于本发明的创新理念,对本文所述实施例进行的变更和修改,或利用本发明说明书及附图内容所作的等效结构或等效流程变换,直接或间接地将以上技术方案运用在其他相关的技术领域,均包括在本发明的专利保护范围之内。

Claims (3)

1.一种动态随机存储方法,其特征在于,包括如下步骤,当芯片的DDR控制器发出burst读数据请求时,返回每组32bit,共8组数据;控制ECC纠错码按照每两组32bit合并纠错一次生成纠错码,每一个时钟周期内的burst读数据请求返回4组纠错码,每次纠错码等分成两份短码,分别随两组的32bit数据返回。
2.一种动态随机存储系统,其特征在于,包括DDR控制器模块、返回模块、纠错模块,所述DDR控制器模块用于发出burst读数据请求,所述返回模块用于返回每组32bit,共8组数据,所述纠错模块用于按照每两组32bit合并纠错一次生成纠错码,每一个时钟周期内的burst读数据请求返回4组纠错码,所述纠错模块还用于将每次的纠错码等分成两份短码,分别随两组的32bit数据返回。
3.根据权利要求2所述的动态随机存储系统,其特征在于,还包括主控芯片,所述主控芯片包括32个数据IO接口和4个纠错码IO接口,所述数据IO接口和纠错码IO接口分别用于接收同时返回的数据和纠错码,并将数据和纠错码分别存储。
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