Difference between revisions of "The bootloader U-Boot"
From IGEP - ISEE Wiki
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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. | 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. | + | * [[How to boot from MicroSD Card|Boot from MicroSD Card.]] |
* Boot from NAND flash. | * Boot from NAND flash. | ||
* Boot from eMMC. | * Boot from eMMC. |
Revision as of 09:42, 7 May 2018
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.
How to cross compile the U-Boot
In order to compile and build the U-Boot for IGEP PROCESSOR BOARDS you should set the CROSS_COMPILE variable. Set this to the prefix of your toolchain (including the trailing dash "-"). So if your toolchain is invoked as say arm-linux-gnueabi-gcc, just chop off that trailing gcc and that's what you use: arm-linux-gnueabihf-.
As example, once you've downloaded the u-boot source, you should follow these steps:
make CROSS_COMPILE=[cross compiler] [board config]
make CROSS_COMPILE=[cross compiler]
The result will be a MLO and a u-boot.img file. You can install these files, for example, in the boot partition of a SD-card.
Necessary package
Download & Prepare your U-BOOT
U-Boot Freescale-NXP iMX6 Series
Downloading binary files | |
---|---|
Clone the u-boot repo |
Clone the u-boot repository using git address: or |
Checkout u-boot repo |
Go to the u-boot-imx directory and checkout the version 2015.04.y as: $ cd u-boot-imx |
Set the board configuration | |
---|---|
IGEP0046 SMARC Quad | $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0046_imx6dl_2G_defconfig |
IGEP0046 SMARC Dual lite | $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0046_imx6q_2G_defconfig |
IGEP0046 SMARC Solo | $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- xxxxx |
Build u-boot
You can build u-boot executing this command:
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-
U-Boot Texas Instruments Series
Downloading binary files | |
---|---|
Clone the u-boot repo |
Clone the u-boot repository using git address: $ git clone https://git.isee.biz/arm-boot/u-boot-arm.git |
Checkout u-boot repo |
Go to the u-boot-arm directory and checkout the isee_v2017.03 as: $ cd u-boot-arm $ git checkout remotes/origin/isee_v2017.03 -b isee_v2017.03 |
Set the board configuration | |
---|---|
IGEP COM AQUILA RB11 (256MB RAM) | $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0033_defconfig |
IGEP COM PROTON OMAP3530 (IGEP0032) | $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0032_defconfig |
IGEP SMARC AM335x (IGEP0034) | $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0034_defconfig |
IGEP SMARC AM335x (IGEP0034) Lite | $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0034_lite_defconfig |
IGEP COM Module DM3730 (IGEP0030) | $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0030_defconfig |
IGEP COM Module DM3730 (IGEP0020) | $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0020_defconfig |
Build u-boot
You can build u-boot executing this command:
$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-
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