请问uboot的bootargs参数为何总是覆盖掉kernel的cmdline呢？

yqzq

用bootm启动系统的时候，为什么内核参数总是用uboot指定的那个，而不是内核配置文件的参数，我想用内核配置文件指定的参数，但是又不想修改uboot的env，请问该怎么做？

多谢

amarant

修改uboot 参数比重新编译内核容易吧。

arm-linux-gcc

config CMDLINE
        string "Default kernel command string"
        default ""
        help
          On some architectures (EBSA110 and CATS), there is currently no way
          for the boot loader to pass arguments to the kernel. For these
          architectures, you should supply some command-line options at build
          time by entering them here. As a minimum, you should specify the
          memory size and the root device (e.g., mem=64M root=/dev/nfs).

choice
        prompt "Kernel command line type" if CMDLINE != ""
        default CMDLINE_FROM_BOOTLOADER
        depends on ATAGS

config CMDLINE_FROM_BOOTLOADER
        bool "Use bootloader kernel arguments if available"
        help
          Uses the command-line options passed by the boot loader. If
          the boot loader doesn't provide any, the default kernel command
          string provided in CMDLINE will be used.

config CMDLINE_EXTEND
        bool "Extend bootloader kernel arguments"
        help
          The command-line arguments provided by the boot loader will be
          appended to the default kernel command string.

config CMDLINE_FORCE
        bool "Always use the default kernel command string"
        help
          Always use the default kernel command string, even if the boot
          loader passes other arguments to the kernel.
          This is useful if you cannot or don't want to change the
          command-line options your boot loader passes to the kernel.
endchoice

yqzq

回复 3# arm-linux-gcc


太粗心了！ 非常感谢！

cascle

关键还是要看文档