The utility can be installed as a package on Debian-based Linux hosts, or the utility path can be added to the $PATH variable to be invoked during the Linux kernel build process.Īppending the utility location to the $PATH variable will also make it available for builds that require it. This includes Linux kernel, ramdisk and FIT images that are to be loaded by U-Boot. mkimage is used to build images that can be used with U-Boot. The mkimage utility is built along with the U-Boot executable. Start of section headers: 3394048 (bytes into file)įlags: 0x5000200, Version5 EABI, soft-float ABIĬopy the U-Boot binary to the directory that will be used to build the boot image $ cp u-boot /home/boot/u-boot.elf Start of program headers: 52 (bytes into file) The compiled executable binary (u-boot) is an ELF file, however it will not have the. The bootargs variable is set in the uEnv.txt file located in the FAT boot partition of the standard snickerdoodle SD card image.īootargs=console=ttyPS0,115200 root=/dev/mmcblk0p2 rw rootwait earlyprinkīuild U-Boot Get Source $ git clone Configure with Base Configuration $ make ARCH=arm snickerdoodle_defconfig $ make ARCH=arm CROSS_COMPILE=arm-none-eabi. The bootargs U-Boot environment variable (if it exists) is passed to the kernel as boot arguments and will override the bootargs property of the chosen node in the device tree. The root parameter of the boot arguments should be set to the device file for the root filesystem disk partition. The root filesystem disk partition will need to be specified by the boot arguments passed to the kernel. A boot script can, and should, utilize the environment variables to determine filenames, memory addresses and boot mode. The default environment in the U-Boot source by defining the CONFIG_EXTRA_ENV_SETTINGS in the board configuration header file.Ī text file that utilizes the scripting capabilities of U-Boot can be wrapped with a U-Boot header and used to load and boot system components. Normally, U-Boot is configured to utilize the run-time configured environmental variable $modeboot. U-Boot will load the default environment contained Thats why Thorogood® has relentlessly focused on craftsmanship, innovation, and comfort in all our work boots. Comfort and performance are key, and you wont get very far for very long if your boots arent made to stand up under tough conditions. U-Boot has support for several filesystems as well, including FAT32, ext2, ext3, ext4 and Cramfs built in to it. Real work boots are special they arent made like other types of shoes. It supports multiple architectures including ARM, MIPS, AVR32, Nios, Microblaze, 68K and x86. The scripted commands associated assigned to the $modeboot variables can be customized and saved to the environment region of the flash memory. U-Boot is a popular bootloader used by many development platforms. The boot modes of interest for snickerdoodle are SD card and QSPI flash.
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