The bootloader U-Boot
From IGEP - ISEE Wiki
Contents
Overview
This page is meant to be a starting point for people to learn build a u-boot image and show to people the current status of different u-boot versions for IGEP Processor Boards.
What is U-Boot?
Das U-Boot (Universal Bootloader) is an open source, primary boot loader used in embedded devices. Its primary purpose in the shipping system is to load some operating system.
That means that U-Boot is necessary to perform a certain task, but it's nothing you want to throw any significant resources at. Typically U-Boot is stored in relatively small NOR flash memory, which is expensive compared to the much larger NAND devices often used to store the operating system and the application.
Necessary package
Download & Prepare your U-BOOT
We will relate the commercial names with their technical names. In order to send a clear message and not get confussions.
In addition, will be a distintion between NXP products ( IGEP SMARC iMX6) and Texas products.
Commercial Name | Technical name |
---|---|
Texas instruments | |
IGEPv2 | IGEP0020, DM3730 |
IGEP COM MODULE | IGEP0030, DM3730 |
IGEP COM PROTON | IGEP0032, OMAP3530 |
IGEP COM AQUILA | IGEP0033, AM335x |
IGEPv5 | IGEP0050, OMAP5 |
IGEP SMARC AM335x | IGEP0034, AM335x |
IGEP SMARC AM335x Lite | IGEP0034, Lite, AM335x |
Freescale-NXP | |
IGEP SMARC iMX6 Solo | IGEP0046, IMX6XX |
IGEP SMARC iMX6 Dual Lite | IGEP0046, iMX6DL |
IGEP SMARC iMX6 Dual | IGEP0046, iMX6XX |
IGEP SMARC iMX6 Quad | IGEP0046, iMX6Q |
U-Boot Texas Instruments Series
Downloading binary files | |
---|---|
Clone the u-boot repo |
Clone the u-boot repository using git address: $ git clone @git.isee.biz:arm-boot/u-boot-arm.git
or |
Checkout u-boot repo |
Go to the u-boot-arm directory and checkout the isee_v2017.03 as: $ cd u-boot-arm
|
Once we have downloaded we will execute the file called defconfig, that it variates in function of each module. It's recommended to make a clean of console...
$ make distclean
Set the board configuration(Prepare your U-BOOT) | |
---|---|
IGEPv2 |
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0020_defconfig
|
IGEP COM Module |
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0030_defconfig
|
IGEP COM PROTON |
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0032_defconfig
|
IGEP COM AQUILA |
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0033_defconfig
|
IGEPv5 |
----
|
IGEP SMARC AM335x |
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0034_defconfig
|
IGEP SMARC AM335x Lite |
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0034_lite_defconfig
|
The result for Texas Instruments processor based board will be a MLO and u-boot.img.
Build u-boot
You can build u-boot executing this command: COMPROVAR
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-
U-Boot Freescale-NXP iMX6 Series
Downloading binary files | |
---|---|
Clone the u-boot repo | Clone the u-boot repository using git address:$ git clone git@git.isee.biz:arm-boot/u-boot-imx.git
or $ git clone <a class="external bs-external-link bs-protocol-https" title="https://git.isee.biz/arm-boot/u-boot-imx.git" href="https://git.isee.biz/arm-boot/u-boot-imx.git" data-bs-type="external_link" data-bs-wikitext="https://git.isee.biz/arm-boot/u-boot-imx.git%20https://git.isee.biz/arm-boot/u-boot-imx.git">https://git.isee.biz/arm-boot/u-boot-imx.git</a> |
Checkout u-boot repo | Go to the u-boot-imx directory and checkout the version 2015.04.y as:$ cd u-boot-imx |
Once we have downloaded we will execute the file called defconfig, that it variates in function of each module. It's recommended to make a clean of console...
$ make distclean
Set the board configuration | |
---|---|
IGEP0046 SMARC Solo |
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- xxxxx
|
IGEP0046 SMARC Dual lite |
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0046_imx6dl_2G_defconfig
|
IGEP0046 SMARC Dual |
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- xxxxx
|
IGEP0046 SMARC Quad |
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0046_imx6q_2G_defconfig
|
The result for iMX6 processor based will be a u-boot.imx.
Build u-boot
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-
For both processors we can do...
What next...
After build u-boot you can use it for boot the board, exist several options for boot, check the Hardware Reference Manual about the options available for your board.
- Boot from MicroSD Card.
- Boot from NAND flash.
- Boot from eMMC.
- Boot from USB.
- Boot from Network.
Configurations files
The result for iMX6 processor based will be a u-boot.imx.
Modules | Files |
---|---|
IGEP0046 SMARC iMX6 Duallite 2GB | igep0046_imx6dl_2G_defconfig |
IGEP0046 SMARC iMX6 DUAL | |
IGEP0046 SMARC iMX6 QUAD | igep0046_imx6q_2G_defconfig |
IGEP0046 SMARC iMX6 SOLO |
The result for Texas Instruments processor based board will be a MLO and u-boot.img. (COMPROVAR)
Modules |
"Files" |
---|---|
IGEP0030 DM3730 Module | igep0030_defconfig |
IGEP0020 DM3730 IGEPv2 | igep0020_defconfig |
IGEP0033 AM335x AQUILA Module | am335x_igep0033_defconfig |
IGEP0032 OMAP3530 PROTON Module | igep0032_defconfig |
IGEP0034 SMARC AM335x Module | am335x_igep0034_defconfig |
IGEP0034 SMARC AM335x Module lite | am335x_igep0034_lite_defconfig |
IGEP0050 OMAP5 IGEPv5 |
Stable U-Boot
The software git repository is located here.
U-boot: OMAP3 boards, OMAP5 boards, AM335x boards is located here.
U-boot: iMX6 boards is located here.
u-boot firmware binaries can be downloaded from here.
[EOL] For OMAP3 based platforms, ISEE do not support u-boot, instead of, ISEE provides The IGEP X-loader
How to cross compile the U-Boot
make CROSS_COMPILE=[cross compiler] [board config]
make CROSS_COMPILE=[cross compiler]u-boot Freescale-NXP iMX6 series
u-boot Texas Instruments AM335x, OMAP3, DM3730, OMAP5432 series