arm笔记八之laili

设时序！！！！！！！！！！！！！ 能大不能小 最大无所谓，然后再调 sdram 时序掌握 kernel busybox application 编译是用同一个编译器 dd if=/dev/zero of=./root.fs bs= count=10 losetup /dev/loop7 root.fs losetup -d /dev/loop7 mkfs.ext3 /dev/loop7 mount -o loop rootfs.ext3 /mnt/ mknod console c 5 1 mknod null 1 1 mkimage -A arm -O linux -T kernel -C none -a 0x30008000 -e 0x30008040 -o bzli -d zImage uImag 3种启动方式 initrd=0x3000 root=/dev/ram0 -------------  make the file system image ---------- ## total =  bs * count 1. dd if=/dev/zero of=  bs= count= ## insert the file into the loopback device 2. losetup /dev/loop   ## format the block device 3. mkfs.  /dev/loop ## detach the image file from the loopback device 4. losetup -d /dev/loop -------------- build the file system (busybox) ------------ ## choice  the link type: static link or dymanic link 1. Build Options ---> Build BusyBox as a satic library....... ## configure the compiler prefix 2. Build Options ---> Do you want to build ....... ## configure Installation floder 3. Installoation Options --> busybox installation prefix ## choice init process 4. Init Uitilies ---> init ## choice the shell 5. Shells ---> Choose ...... ---> ash ## build 6. make ## install 7. make install -------------- copy the busybox into the image file ------- 1. mount -o loop     2. cp -rf 3. cd 4. mkdir dev  proc sys 5. mknod dev/console c 5 1 6. mknod dev/null  c  1 3     ## if the busybox linked as dynamic linker        cp -rf /arm-linux/lib/* lib/ 7. umount ======================================================================== --------------------- A. boot from nand flash ----------------- 1.  nand erase    2.  tftp 30000000 3.  nand write 30000000 ## configure command line tag for kernel booting 4.  setenv bootargs noinitrd mem=64M console=ttySAC0 root=/dev/mtdblock2     saveenv ## configure command line tag for kernel booting 4.  setenv bootargs noinitrd mem=64M console=ttySAC0 root=/dev/mtdblock2     saveenv ## download the kernel image and boot it 5. tftp 30008000 uImage    bootm 30008000     ----------- done-------- -------------------- B. boot from init ram disk---------------------- 1. tftp 2. setenv bootargs initrd=, mem=64M console=ttySAC0 root=/dev/ram0    saveenv ## download the kernel image and boot it 3. tftp 30008000 uImage    bootm 30008000    ------------ done ------- ------------------- C. boot from network file system (nfs) ------- ## configure the nfs service of your host 1. ..... ## copy the busybox into the nfs service root dir 2. cp -rf    cd    mkdir dev  proc sys    mknod dev/console c 5 1 ------------------- C. boot from network file system (nfs) ------- ## configure the nfs service of your host 1. ..... ## copy the busybox into the nfs service root dir 2. cp -rf    cd    mkdir dev  proc sys    mknod dev/console c 5 1    mknod dev/null  c  1 3     ## if the busybox linked as dynamic linker        cp -rf /arm-linux/lib/* lib/ ## setup the command line tags on the development board 3. setenv bootargs noinitrd console=ttySAC0,115200 mem=64M root=/dev/nfs     nfsroot=192.168.0.3:/     ip=192.168.0.2:192.168.0.3:192.168.0.3:255.255.255.0::eth0:off ## download the kernel image and boot it 3. tftp 30008000 uImage    bootm 30008000    ------------ done -------