get("bootargs"); //得到启动 fdt_setprop(fdt, nodeoffset, "bootargs", str, strlen(str) + 1); /把"bootargs"设置成设备树的属性 arch_fixup_fdt or (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { start[bank] = bd->bi_dram[bank].start; size[bank] = bd-...
pmic vdd1250000设置bootargs #setenv bootargs console=ttyS0,115200root=/dev/mmcblk1p2 rw rootwait gpu=384M mem=792M video=nusmartfb:${resolution}-${dispformat} 706_hw_ver=2init=/init quiet no_console_suspend 设置default_bootargs #setenv default_bootargs console=ttyS0,115200root=/dev/mmcblk...
storeargs=setenv bootargs ${initargs} logo=${display_layer},loaded,${fb_addr},${outputmode} vout=${outputmode},enable hdmimode=${hdmimode} cvbsmode=${cvbsmode} hdmitx=${cecconfig} cvbsdrv=${cvbs_drv} androidboot.firstboot=${firstboot} quiet jtag=${jtag}; setenv bootargs ${bootargs...
1. Bootloader功能分析 Bootloader(如Uboot、Redboot、Blob、vivi等)直接和CPU、外围硬件设备(存储器、网卡、LCD等)打交道,负责初始化硬件设备,以及负责拉起内核:建立内存空间映射图,为内核的启动运行做好一切准备,最后将Linux内核代码加载到RAM中运行。 一般来说,bootload都会提供两种操作模式: 正常启动模式:无需开发...
(1)引导加载程序,包括固化在固件(firmware)中的 boot 代码(可选)和Bootloader两大部分。 有些CPU在运行Bootloader之前先运行一段固化的程序(固件,firmware),比如x86结构的CPU就是先运行BIOS中的固件,然后才运行硬盘第一个分区(MBR)中的Bootloader。 在大多嵌入式系统中并没有固件,Bootloader是上电后执行的第一个程...
这段代码就是如何把MAC地址通过bootargs传给内核) #ifndef CONFIG_TI814X_OPTI_CONFIG #define CONFIG_AUTO_COMPLETE (UBOOT命令补全功能一定要打开,否则在uboot命令行无法使用tab键补全命令) #define CONFIG_CMDLINE_EDITING(这个支持UBOOT命令行光标键查询历史命令,一般和CONFIG_AUTO_COMPLETE结合使用,一定要加上) ...
- vxWorks boot parameters: bootvx constructs a valid bootline using the following environments variables: bootdev, bootfile, ipaddr, netmask, serverip, gatewayip, hostname, othbootargs. It loads the vxWorks image pointed bootfile. Note: If a "bootargs" environment is defined, it will over...
E.g "u=username pw=secret" Note: If a "bootargs" environment is defined, it will overwride the defaults discussed just above. - Cache Configuration: CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot CONFIG_...
uboot相关命令及用法 uboot相关命令及⽤法进⼊uboot时，在命令⾏上敲“？” ，回车就会打印出在uboot⾥可⽤的命令：#?- alias for 'help'base - print or set address offset boot - boot default, i.e., run 'bootcmd'bootd - boot default, i.e., run 'bootcmd'bootelf - Boo...
The value of CONFIG_BOOTARGS goes into the environment value "bootargs". CONFIG_RAMBOOT and CONFIG_NFSBOOT The value of these goes into the environment as "ramboot" and "nfsboot" respectively, and can be used as a convenience, when switching between booting from RAM and NFS. - Pre-Boot ...