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If it fails, it falls back to booting u-boot.img. MLO falls back to checking if the uImage exists in a FAT There is a valid uImage present at a defined offset. When falcon mode isД®nabled in U-Boot build (usually enabled by default), MLO checks if

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Keeping вЂcвЂ™ key on the serial terminal pressed. Optionally, in order to enter into U-Boot, reset the board while In this boot mode SPL (first stage bootloader) directly boots the Linux Note:: must be at least the hex size of the file size.Д«ooting from SD/eMMC from SPL (Single stage or Falcon mode) Setenv init_usb 'usb start run args_all args_usb' U-Boot # mmc write $ setenv filesize run set_rd_spec' If using ISC dhcpd an example host entry would look like this: BoardДM814x ROM (PG1.0) or AM335x ROM (PG2.0 and later) Spl/u-boot-spl.bin and u-boot.img files to boot.

Vendor-class-identifier DHCP field is filled out by the ROM and the In addition, the DHCP server is needed to reply to the target In some cases, a special build of U-Boot may be In some cases we support loading SPL and U-Boot over the network because Perform these operations on the supported hardware. At this time, no special builds of U-Boot are required to

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This section documents how to configure the network and use it to loadДЇiles and then boot the Linux Kernel using a root filesystem mounted

Use default вЂњdra7xx_evm_defconfigвЂќ to build spl/u-boot-spl.bin,.

Example provided here is for dra7xx platform.

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Once the u-boot is up, use DFU command from u-boot to flash theД«inary images from Host PC (using dfu-utils tool) to the eMMC, or.

Load the MLO and u-boot.img using the dfu-util from host PC.

Enable the SPL-DFU feature in u-boot and build MLO/u-boot binaries.

SoC where board support USB peripheral boot mode. The USB Peripheral boot mode is used to boot DRA7x EVM using USB USB Peripheral boot mode on DRA7x/AM57x (SPL-DFU support) Finally, to program via DFU forДЄ given storage device see the section for the storage device you are You will need to use the options that dfu-util provides for If you have more than one device plugged in Second, the examples that follow assume a single board is If yourДistribution does not provide this package you will need to build itДЇrom source. First of all, you will need to get aД¬opy of the dfu-util program installed on your host. Medium to be written to and of the board being used, there are some

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When working with USB Device Firmware Upgrade (DFU), regardless of the Use the following table to determine what defconfig to use to configureДЈ.1.1.3. However first configure the build for the board you are working with. For e.g:Д«uilding of both u-boot and SPL is done at the same time. Release that corresponds to this U-Boot release. We strongly recommend using the toolchain that came with the Linux Core Targets it is very easy to know which folder contains the u-boot That way if you are working with multiple configuration You use an output directory name that is identical to the configuration We strongly recommend the use of separate object directories whenД«uilding. Same media as the kernel, and from the same relative path. The device tree is expected to be loaded from the In the Keystone-2ДЇamily devices (K2H/K/E/L/G), it is specified by name_fdt variableДЇor each platform. To facilitate this in SitaraДЇamily devices, within U-Boot we have a command in the environment namedДЇindfdt that will set the fdtfile variable to the name of theДevice tree to use, as found with the kernel sources. GIT repo URL, branch and commit id can be found in theДЄ note about device trees. Information are provided to show how to use a specific feature, whenДЇinally, please note that not all boards have all of the interfacesДЄlternatively, U-Boot sources can directly be fetched from GIT. Servers is also outside of the scope of this document, but snippets of Linux Kernel has already been built (or has been provided) as well as anДЄppropriate filesystem image. Serial port for the board has been configured. We assume that a GCC-based toolchain has already been installed and the This document covers the general use of Linux Core Release of U-Boot on