The bootloader U-Boot

From IGEP - ISEE Wiki

Revision as of 11:01, 8 May 2018 by Francesc Megias (talk | contribs) (U-Boot Freescale-NXP  Serie)

Jump to: navigation, search

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

 Will be a distintion between NXP-processors products and ARM-processors products.

Commercial Name U-Boot Series
IGEPv2 DM3730 ARM
IGEP COM MODULE DM3730/AM3703 ARM
IGEP COM AQUILA AM335x ARM 
IGEPv5 OMAP5432 ARM
IGEP SMARC AM335x ARM
IGEP SMARC iMX6 Solo Freescale-NXP
IGEP SMARC iMX6 Dual Lite Freescale-NXP
IGEP SMARC iMX6 Dual Freescale-NXP
IGEP SMARC iMX6 Quad Freescale-NXP

Once we know which U-Boot have we will clone the corresponding git repository

U-Boot ARM Serie

First we will download the U-Boot file for be able to make the configuration.

Downloading binary files

Clone the u-boot repo

Clone the u-boot repository using git address:

$ git@git.isee.biz:arm-boot/u-boot-arm.git 

or

 $ 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 

U-Boot Freescale-NXP  Serie

First we will download the U-Boot file for be able to make the configuration.

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 https://git.isee.biz/arm-boot/u-boot-imx.git

Checkout u-boot repo 

Go to the u-boot-imx directory and checkout the version 2015.04.y as:

$ cd u-boot-imx

$ git checkout remotes/origin/isee_imx_v2017.03_4.9.11_1.0.0_ga -b isee_imx_v2017.03_4.9.11_1.0.0_ga 

Once we have downloaded we will execute the file called defconfig, that it variates in function of each model.

In order to load the default configuration of the target board, we have to write the following command:

.,x´dad



 

Set the board configuration(Prepare your U-BOOT)

|- ! style="background-color: #f2f2f2; width: 227px;"|Model ! style="background-color: #f2f2f2; width: 48px;"|defconfig ! style="width: 579px; background-color: #f2f2f2;"|Example |- ! style="background-color: #ffffff; width: 227px;"|IGEPv2 DM3730 | style="background-color: #ffffff; width: 48px; text-align: center; vertical-align: middle;"|igep0020_defconfig | style="width: 579px;"|

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0020_defconfig

|- ! style="background-color: #ffffff; width: 227px;"|IGEP COM Module DM3730/AM3703 | style="background-color: #ffffff; width: 48px; text-align: center; vertical-align: middle;"|igep0030_defconfig | style="width: 579px;"|

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0030_defconfig 

|- ! style="background-color: #ffffff; width: 227px;"|IGEP COM AQUILA AM335x | style="background-color: #ffffff; width: 48px; text-align: center; vertical-align: middle;"|am335x_igep0033_defconfig | style="width: 579px;"|

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0033_defconfig

|- ! style="background-color: #ffffff; width: 227px;"|IGEPv5 OMAP5432 | style="background-color: #ffffff; width: 48px; text-align: center; vertical-align: middle;"|  | style="width: 579px;"|

----

|- ! style="background-color: #ffffff; width: 227px;"|IGEP SMARC AM335x  | style="background-color: #ffffff; width: 48px; text-align: center; vertical-align: middle;"|am335x_igep0034_defconfig | style="width: 579px;"|

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0034_defconfig

|- ! style="background-color: #ffffff; width: 227px;"|IGEP0046 SMARC Solo | style="background-color: #ffffff; width: 48px; text-align: center; vertical-align: middle;"|  | style="width: 579px;"|

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- xxxxx 

|- ! style="background-color: #ffffff; width: 227px;"|IGEP0046 SMARC Dual lite | style="background-color: #ffffff; width: 48px; text-align: center; vertical-align: middle;"|igep0046_imx6dl_2G_defconfig | style="width: 579px;"|

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0046_imx6dl_2G_defconfig 

|- ! style="background-color: #ffffff; width: 227px;"| IGEP0046 SMARC Dual  | style="background-color: #ffffff; width: 48px; text-align: center; vertical-align: middle;"|  | style="width: 579px;"| 

$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- xxxxx 

|- ! style="background-color: #ffffff; width: 227px;"| IGEP0046 SMARC Quad | style="background-color: #ffffff; width: 48px; text-align: center; vertical-align: middle;"|igep0046_imx6q_2G_defconfig | style="width: 579px;"|

 $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- igep0046_imx6q_2G_defconfig

|}


Build u-boot

After running the defconfig. You can build u-boot by executing this command:

 $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-


  • The result for Texas Instruments processor based board will be a MLO and u-boot.img.
  • The result for iMX6 processor based will be a u-boot.imx.


You can install these files, for example, in the boot partition of a SD-card.  

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.


u-boot Freescale-NXP iMX6 series

u-boot Texas Instruments AM335x, OMAP3, DM3730, OMAP5432 series