b. On the host machine, set the environment with the following command before
building for i.MX 6 or i.MX 7 SoC.
$ export CROSS_COMPILE=/opt/fsl-imx-fb/4.9.88/environment-setup-cortexa9hf-vfp-neon-
poky-linux-gnueabi
$ export ARCH=arm
c. To build the U-Boot in the standalone environment, execute the following
commands.
Download source by cloning with:
$ git clone https://source.codeaurora.org/external/imx/uboot-imx -b
imx_v2017.03_4.9.51_imx8_beta2
d. To build U-Boot in the standalone environment, find the configuration for the
target boot in the configs/ directory of the uboot-imx source code. In the
following example, i.MX 6ULL is the target.
$ cd uboot-imx
$ make clean
$ make mx6ull_14x14_evk_defconfig
$ make u-boot.imx
e. To create a custom board, copy a reference defconfig for the associated SoC to a
new name and place in the configs folder and build using the new config name.
f. For i.MX 8, use the imx-mkimage tool to combine the U-Boot binary with Arm
Trusted Firmware (ATF) and SCUFW to produce the final flash.bin boot image
and burn to the SD card. See the imxmkimage tool for details.
g. To burn the boot image to the SD card, execute the following command:
dd if=<boot_image> of=/dev/sd<x> bs=1k seek=<offset> conv=fsync
Where:
• offset is:
• 1 - for i.MX 6 or i.MX 7
• 33 - for i.MX 8
• sd<x> is:
• Device node for the SD card
• boot_image is:
• u-boot.imx - for i.MX 6 or i.MX 7
• flash.bin - for i.MX8
3.1.2
How to build and load U-Boot in Yocto Project
To integrate U-Boot changes in Yocto Project, perform the following steps:
1. Set up a build environment for building the associated SoC on an i.MX reference
board in Yocto Project by following the directions in the README either in the
U-Boot overview
i.MX BSP Porting Guide, Rev. L4.9.88_2.0.0-ga, 05/2018
14 NXP Semiconductors
我的内容管理
展开
