How do I configure U-Boot?

To summarize, you need to configure U-Boot for your with the following steps:

  1. Add your board device tree: arch/arm/dts/.
  2. Create your own board support directory: board//.
  3. Add TARGET_ _ in Kconfig.
  4. Create your board defconfig: defconfig/_defconfig.

What is U-Boot IMX?

NXP Employee. Hi, tom. The difference between u-boot.bin and u-boot.imx is the IVT header. That means after u-boot.bin is build, we will also add a IVT header and put it in front of u-boot.bin. This IVT header is for our boot ROM to identify the u-boot’s location & function etc…

How do you boot a load kernel?

What is U-Boot?

  1. Connect the Ethernet cable to the Physical Board (Embedded Processor ).
  2. Copy the kernel image (uImage) to the /TFTP boot directory of your Linux host workstation.
  3. Copy the file system image from the /TFTP boot directory of your Linux host workstation.

What is SPL in U-Boot?

SPL (Secondary Program Loader) is a small binary, generated from U-Boot source, that fits in the SRAM and loads the main U-Boot into system RAM. between the SPL and the main U-Boot. – SPL also relies heavily on toolchain garbage collection.

What is the purpose of U-Boot?

U-Boot boots an operating system by reading the kernel and any other required data (e.g. device tree or ramdisk image) into memory, and then executing the kernel with the appropriate arguments. U-Boot’s commands are actually generalized commands which can be used to read or write any arbitrary data.

How do I debug a boot?

Debug before relocation

  1. Boot the board with the BOOT binary using a SD card.
  2. Generate a new Debug configuration for running target and launch it.
  3. Connect to the target using XSCT console.
  4. mmap the u-boot ELF file and add a breakpoint in the board_init_f function (Function prior the relocation)

Why do we need a boot?

If it is U-Boot, great, if not, it knows where to load the main operating system or where to load U-Boot (or some other bootloader). U-Boot (speaking of bootloaders in general) then configures a minimal set of devices, memory, chip settings, etc., to enable the main OS to be loaded and started.

What is boot SCR in Petalinux?

Starting in 2020.1, this the default method used by Petalinux. In the absence of a valid extlinux. conf file, U-Boot will scan the boot_targets list looking for a file named boot. scr (in that order) and run any commands located in the script file.

What is the version of U-Boot that I am using?

You neglect to mention what version of U-Boot that you are using. The following applies to version 2017.09. The board’s configuration header file is specified by a config variable defined in the Kconfig file. which means include/configs/am335x_evm.h is used as the board configuration header file.

What happens when I change the U-Boot config file?

When I do this, the .config file in the build directory reverts to the default config (not my altered version) and the resulting u-boot binary doesn’t have the change (boot delay still 3 sec). I think my layer is getting processed because I see this in the output:

How to change the config of U-Boot in Yocto Stack Overflow?

Prepare your config in full format (not the defconfig stripped down version). Then add it to SRC_URI and use it through an additional task in your .bbappend:

How to boot from SD using U-Boot?

For booting from sd with mainline u-boot, the recommended way is: create a file boot.cmd on the first partition (also check Kernel arguments for extra ‘bootargs’ options): If you’re wondering why setting bootm_boot_mode might be necessary for older kernels, have a look at the details of PSCI.