Samsung V1.3.0 사용자 설명서

 

II 

 

        

Linux 

RFS 

v1.3.0 

Porting 

Guide 

 

This document is a porting guide of RFS  developed by Flash Software Group, Memory 

Division, Samsung Electronics. It describes Linux RFS porting procedure to user's target platform. 

 

Purpose 
 

This document is RFS Porting Guide. This document explains the definition, 

 

architecture, system requirement, and porting tutorial of RFS. This document also 

 

provides the features and API of each module that a user should know well to port RFS. 

Combine the above two paragraphs for one into a meaningful one 

 

Scope 
 

This document is for Project Manager, Project Leader, Application Programmers, etc. 

Definitions and Acronyms 
 

FTL (Flash 

Translation Layer) 

A software module which maps between logical 

addresses and physical addresses when accessing to 
flash memory 

IDE 

Integrated Development Environment 

CRAMFS 

Compressed ROM File System 

RFS 

Robust FAT File System 

VFS 

Virtual File System 

XSR 

eXtended Sector Remapper 

MTD 

Memory Technology Device 

LLD 

Low Level Device Driver 

Sector 

The file system performs read/write operations in a 

512-byte unit called sector. 

Page 

NAND flash memory is partitioned into fixed-sized 
pages. A page is (512+16) bytes or (2048 + 64) bytes. 

Block 

NAND flash memory is partitioned into fixed-sized 
blocks. A block is 16K bytes or 128K bytes. 

NAND flash device 

NAND flash device is a device that contains NAND flash 

memory or NAND flash controller. 

NAND flash memory  NAND-type flash memory 

Deferred Check 

Operation 

The method that can increase time and device 
operation performance. Every operation function of LLD 

defers the check routine to the next operation.  

OneNAND 

Samsung NAND flash device that includes NAND flash 

memory and NAND flash controller.