本文主要是介绍打开CMDLINE中的 ” earlyprink “ 参数，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
解决问题的过程中，好文章推荐，都保存在火狐wilson_sq@qq.com记录中~~~~~~~~grep -r "earlyprintk" kernel
kernel/Documentation/driver-model/platform.txt:should use early_platform_init("earlyprintk", &platform_driver).
./arch/sh/configs/sh2007_defconfig:CONFIG_CMDLINE="console=ttySC1,115200 ip=dhcp root=/dev/nfs rw nfsroot=/nfs/rootfs,rsize=1024,wsize=1024 earlyprintk=sh-sci.1"
./arch/sh/configs/rsk7203_defconfig:CONFIG_CMDLINE="console=ttySC0,115200 earlyprintk=serial ignore_loglevel"
./arch/sh/configs/migor_defconfig:CONFIG_CMDLINE="console=tty0 console=ttySC0,115200 earlyprintk=serial ip=on root=/dev/nfs ip=dhcp"
./arch/sh/configs/sdk7786_defconfig:CONFIG_CMDLINE="console=ttySC1,115200 earlyprintk=sh-sci.1,115200 root=/dev/sda1 nmi_debug=state,debounce rootdelay=5 pmb=iomap ignore_loglevel"
./arch/sh/configs/rsk7201_defconfig:CONFIG_CMDLINE="console=ttySC0,115200 earlyprintk=serial ignore_loglevel"
./arch/sh/configs/shx3_defconfig:CONFIG_CMDLINE="console=ttySC0,115200 earlyprintk=bios ignore_loglevel"
/************************************
全盘搜索earlyprintk查看其调用过程
***************************************/
全盘搜索earlyprintk查看其调用过程
①在kernel-parameters.txt中有如下描述，看我们的对应哪个,
earlyprintk= [X86,SH,BLACKFIN,ARM] earlyprintk
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