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Embedded system 2008/7/16 莊宜勳
 

Embedded system 2008/7/16 莊宜勳

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  • 在 small-scale 雖然 linux 可以跑 , 但不使用 linux 反而更好
  • High-level abstraction => 系統內部的管理軟體 ( 如 automount) Low-level interface => driver
  • Boot loader 需支援某些 filesystem, 像 lilo 和 grub 支援 linux 和 windows 的 filesystem, 所以兩者都可以支援開機 但 windows 的 loader 不支援 linux 的 filesystem, 所以無法開 linux kernel
  • Boot loader 除了 kernel 之外亦會將 initrd 一起 load 進 memory Initrd 可以看成一個虛擬的 root filesystem, 裡面有需要用的 modules
  • Ace xxx 最後王牌 , 最後的手段
  • Mmap => 將 file or device into memory Memcpy 在小檔案比較快 , mmap 在檔案越大越有效率

Embedded system 2008/7/16 莊宜勳 Embedded system 2008/7/16 莊宜勳 Presentation Transcript