ǶÈëʽLinuxÎļþϵͳ¼ò½é
LinuxÖ§³Ö¶àÖÖÎļþϵͳ£¬°üÀ¨ext2¡¢ext3¡¢vfat¡¢ntfs¡¢iso9660¡¢jffs¡¢romfsºÍnfsµÈ£¬ÎªÁ˶Ը÷ÀàÎļþϵͳ½øÐÐͳһ¹ÜÀí£¬LinuxÒýÈëÁËÐéÄâÎļþϵͳVFS(Virtual File System)£¬Îª¸÷ÀàÎļþϵͳÌṩһ¸öͳһµÄ²Ù×÷½çÃæºÍÓ¦Óñà³Ì½Ó¿Ú¡£
LinuxϵÄÎļþϵͳ½á¹¹ÈçÏ£º
LinuxÆô¶¯Ê±£¬µÚÒ»¸ö±ØÐë¹ÒÔØµÄÊǸùÎļþϵͳ£»Èôϵͳ²»ÄÜ´ÓÖ¸¶¨É豸ÉϹÒÔØ¸ùÎļþϵͳ£¬Ôòϵͳ»á³ö´í¶øÍ˳öÆô¶¯¡£Ö®ºó¿ÉÒÔ×Ô¶¯»òÊÖ¶¯¹ÒÔØÆäËûµÄÎļþϵͳ¡£Òò´Ë£¬Ò»¸öϵͳÖпÉÒÔͬʱ´æÔÚ²»Í¬µÄÎļþϵͳ¡£
²»Í¬µÄÎļþϵͳÀàÐÍÓв»Í¬µÄÌØµã£¬Òò¶ø¸ù¾Ý´æ´¢É豸µÄÓ²¼þÌØÐÔ¡¢ÏµÍ³ÐèÇóµÈÓв»Í¬µÄÓ¦Óó¡ºÏ¡£ÔÚǶÈëʽLinuxÓ¦ÓÃÖУ¬Ö÷ÒªµÄ´æ´¢É豸ΪRAM(DRAM, SDRAM)ºÍROM(³£²ÉÓÃFLASH´æ´¢Æ÷)£¬³£ÓõĻùÓÚ´æ´¢É豸µÄÎļþϵͳÀàÐͰüÀ¨£ºjffs2, yaffs, cramfs, romfs, ramdisk, ramfs/tmpfsµÈ¡£
1. »ùÓÚFLASHµÄÎļþϵͳ
Flash(ÉÁ´æ)×÷ΪǶÈëʽϵͳµÄÖ÷Òª´æ´¢Ã½½é£¬ÓÐÆä×ÔÉíµÄÌØÐÔ¡£FlashµÄдÈë²Ù×÷Ö»ÄܰѶÔӦλÖõÄ1ÐÞ¸ÄΪ0£¬¶ø²»ÄܰÑ0ÐÞ¸ÄΪ1(²Á³ýFlash¾ÍÊǰѶÔÓ¦´æ´¢¿éµÄÄÚÈݻָ´Îª1)£¬Òò´Ë£¬Ò»°ãÇé¿öÏ£¬ÏòFlashдÈëÄÚÈÝʱ£¬ÐèÒªÏȲÁ³ý¶ÔÓ¦µÄ´æ´¢Çø¼ä£¬ÕâÖÖ²Á³ýÊÇÒÔ¿é(block)Ϊµ¥Î»½øÐеġ£
ÉÁ´æÖ÷ÒªÓÐNORºÍNANDÁ½ÖÖ¼¼Êõ(¼òµ¥±È½Ï¼û¸½Â¼)¡£Flash´æ´¢Æ÷µÄ²Áд´ÎÊýÊÇÓÐÏ޵ģ¬NANDÉÁ´æ»¹ÓÐÌØÊâµÄÓ²¼þ½Ó¿ÚºÍ¶ÁдʱÐò¡£Òò´Ë£¬±ØÐëÕë¶ÔFlashµÄÓ²¼þÌØÐÔÉè¼Æ·ûºÏÓ¦ÓÃÒªÇóµÄÎļþϵͳ£»´«Í³µÄÎļþϵͳÈçext2µÈ£¬ÓÃ×÷FlashµÄÎļþϵͳ»áÓÐÖî¶à±×¶Ë¡£
ÔÚǶÈëʽLinuxÏ£¬MTD(Memory Technology Device,´æ´¢¼¼ÊõÉ豸)Ϊµ×²ãÓ²¼þ(ÉÁ´æ)ºÍÉϲã(Îļþϵͳ)Ö®¼äÌṩһ¸öͳһµÄ³éÏó½Ó¿Ú£¬¼´FlashµÄÎļþϵͳ¶¼ÊÇ»ùÓÚMTDÇý¶¯²ãµÄ(²Î¼ûÉÏÃæµÄLinuxϵÄÎļþϵͳ½á¹¹Í¼)¡£Ê¹ÓÃMTDÇý¶¯³ÌÐòµÄÖ÷ÒªÓŵãÔÚÓÚ£¬ËüÊÇרÃÅÕë¶Ô¸÷ÖÖ·ÇÒ×ʧÐÔ´æ´¢Æ÷(ÒÔÉÁ´æÎªÖ÷)¶øÉè¼ÆµÄ£¬Òò¶øËü¶ÔFlashÓиüºÃµÄÖ§³Ö¡¢¹ÜÀíºÍ»ùÓÚÉÈÇøµÄ²Á³ý¡¢¶Á/д²Ù×÷½Ó¿Ú¡£
˳±ãÒ»Ìᣬһ¿éFlashоƬ¿ÉÒÔ±»»®·ÖΪ¶à¸ö·ÖÇø£¬¸÷·ÖÇø¿ÉÒÔ²ÉÓò»Í¬µÄÎļþϵͳ£»Á½¿éFlashоƬҲ¿ÉÒԺϲ¢ÎªÒ»¸ö·ÖÇøÊ¹Ó㬲ÉÓÃÒ»¸öÎļþϵͳ¡£¼´ÎļþϵͳÊÇÕë¶ÔÓÚ´æ´¢Æ÷·ÖÇø¶øÑԵ쬶ø·Ç´æ´¢Ð¾Æ¬¡£
(1) jffs2
JFFSÎļþϵͳ×îÔçÊÇÓÉÈðµäAxi
Ïà¹ØÎĵµ£º
--Ê×ÏÈ¿´¿´ÓÐÄÄЩ´ÅÅÌ
[root@localhost ~]# fdisk -l
--Òª´¦ÀíµÄÊÇsdj£¬Ê¹ÓÃfdisk·ÖÇø
[root@localhost ~]# fdisk /dev/sdj
The number of cylinders for this disk is set to 13054.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with ......
Ò»¡¢NFS·þÎñÆ÷µÄ°²×°
¼ì²élinuxϵͳÖÐÊÇ·ñ°²×°ÁËnfs-utilsºÍportmapÁ½¸öÈí¼þ°ü£¨RHEL4ϵͳĬÈÏÒѾ°²×°ÁËÕâÁ½¸öÈí¼þ°ü£©
ÃüÁî#rpm –q nfs-utils portmap
¶þ¡¢²é¿´NFS·þÎñÆ÷ÊÇ·ñÆô¶¯
ÃüÁî#service nfs starus
......
Intel ¼¯³ÉÏÔ¿¨µÄLinuxÇý¶¯°²×°
¡¡¡¡
¡¡¡¡Ä¿Ç°Ê¹ÓÃIntel ¼¯³ÉÏÔ¿¨µÄ¼ÆËã»úÖ÷Òª¼¯ÖÐÔÚÖеͶËÉÌÎñ̨ʽ»úºÍÖеͶ˱ʼDZ¾µçÄÔ¡£ÕâÀï½éÉÜÒ»ÏÂLinuxÏÂÏÔ¿¨Çý¶¯°²×°·½·¨¡£IntelÕë¶Ô¼¯³ÉÏÔʾоƬÌṩÁËÁ½ÖÖÇý¶¯³ÌÐò£ºi915GraphicsºÍi810Graphics¡£
¡¡¡¡
¡¡¡¡Ò»¡¢ ʹÓÃ82830M, 82845G, 82852GM, 82855GM, 82865G, 82915Gо ......
PCI: bus0: Fast back to back transfers disabled
PCI: Configured XX as a PCI slave with 128MB PCI memory
PCI: Each Region size is 16384KB
PCI: Reserved memory from 0x10080000 to 0x15080000 for DMA and mapped to 0x12000000
¡¡¡¡É豸µÄ³õʼ»¯ init()--->do_basic_init()--->pci_init()£¬³õÊ ......
ÔÚlinuxÖÐ,ÔËÐеÄÒ»¸ö½ø³Ì,»áռȥlinuxµÄÈý¸öµØ·½,´úÂëÇø,¶ÑÕ»ÇøºÍÊý¾ÝÇø.Èç¹ûͬʱÔËÐжà¸öÏàͬµÄ³ÌÐò,ËûÃǾͻáʹÓÃÏàͬµÄ´úÂëÇø,´úÂëÇøÖдæ·ÅµÄ¾Í³ÌÐòµÄ´úÂë,µ«ÊÇÊý¾ÝÇøºÍ¶ÑÕ»Çø·Ö±ð´æ·ÅµÄÊdzÌÐòµÄÊý¾Ý,È«¾Ö±äÁ¿ºÍ¾Ö²¿±äÁ¿,Òò´Ë¼´Ê¹ÊÇÏàͬµÄ³ÌÐò,Ò²²»¿ÉͬʱʹÓÃÏàͬµÄÊý¾ÝºÍ¶ÑÕ»Çø.
#include<stdio.h>
#incl ......