Questions tagged [u-boot]
Das U-Boot (The Universal Bootloader) is an open source, primary boot loader.
231
questions
0
votes
0
answers
11
views
clone uboot and embedded linux fw (openwrt) to a single binary image
I have my embedded device with the following partition:
# cat /proc/mtd
dev: size erasesize name
mtd0: 00030000 00010000 "u-boot"
mtd1: 00010000 00010000 "u-boot-env"
mtd2: ...
- 301
0
votes
2
answers
36
views
uboot kernel and dtb calculation
What is the method to calculate these parameters in uboot ? :
bootm_low=0
bootm_size=7ff00000
fdt_addr_r=0x40000000
fdt_high=0x100000
fdt_size_r=0x400000
fdtcontroladdr=7bc971c0
kernel_addr_r=...
- 61
0
votes
1
answer
29
views
Slow TFTP File Transfer in Uboot 2020
I've got a tftp server running on a virtual machine host, and I'm trying to tftp a linux kernel onto a TI AM33 processor. Both devices are connected on the same network switch. I'm noticing that TFTP ...
0
votes
0
answers
68
views
How u-boot can chain "grub" and booting a mainline kernel on my ARM Chromebook
I would like to enable KVM virtualization on my old ARM Chromebook laptop,based on the Exynos5250 arm 32 bit cpu aka snow,model xe303c12. The first thing I did has been to dd the image below directly ...
- 495
0
votes
0
answers
45
views
Is it possible to improve the speed of calculating cryptographic commands like sha256 in U-Boot?
I tried counting sha256 from the same memory area in U-Boot and on Linux on the same development board (sama5d27-som-ek). The time taken to perform the same operation in U-Boot is almost double. I ...
- 1
1
vote
1
answer
67
views
Why does linux freezes when trying to access peripherals connected to the lightweight hps-to-fpga bridge (or any bridge)?
I have been working on a Altera DE1-SoC Development Board for 8 months. The system I was working on includes a Cyclone V FPGA chip, particularly the 5CSEMA5F31C6N. It was running an embedded Linux ...
- 11
1
vote
1
answer
442
views
Testing u-boot on qemu arm64 virtual machine
I'm trying to run u-boot on qemu arm64 virtual machine.
(qemu 6.2.0, u-boot v2022.07)
so I compiled u-boot using qemu_arm64_defconfig, it does build u-boot (and not u-boot-spl).
I made initrd ...
- 367
1
vote
1
answer
318
views
u-boot/linux hangs after "Starting Linux...."
I need some pointers on how to debug this further.
My setup looks like this:
Hardware: CM3
Pi Firmware boots u-boot, u-boot loads FIT image and is supposed to boot it.
FIT image contains the kernel (...
- 13
1
vote
1
answer
694
views
How to write data to raw NAND FLASH through /dev/mtd0 in Linux?
I am working on an embedded Linux system (5.10.24), where there is a NAND FLASH as storage.
The NAND FLASH is partitioned into 4 parts, part 0 is used for u-boot, part 1 is used for kernel, part 2 is ...
- 327
0
votes
0
answers
68
views
how to pass initramfs address in uboot menuconfig?
Hiii I am running a Linux kernel image in qemu
I make 2 virtual partitions in my SSD (1 for the Linux image and 2 for the root directory (for initials))
now I am running about binary from qemu and I ...
0
votes
0
answers
98
views
How to boot from a usb stick when using U-Boot
I am trying to install ubuntu Mac but once I get to uboot I have absolutely no clear way to boot from my usb-stick that has a bootable ios installed on it.
I assume its possible to boot from a usb ...
- 121
1
vote
0
answers
281
views
OpenBSD 7.2 NanoPi R4S sdmmc0: can't enable card
I am facing the following issue with SD card when trying to install OpenBSD 7.2 on Nanopi R4S (Rockchip RK3399 ARM64 SoC). The same problem as previously described on OpenBSD 7.1 here.
sdmmc0: can't ...
- 11
0
votes
0
answers
147
views
openSUSE installation on root partition encrypted with adiantum cipher
I’m trying to install openSUSE Tumbleweed on my Raspberry Pi 4, using SD card encryption.
That would normally be a trivial task but using regular AES cipher for RPi4 is not recommended as explained ...
- 113
2
votes
1
answer
1k
views
Where can I find the device tree source include (.dtsi) files?
I am attempting to review my device tree to learn more about how the usb endpoints are defined, and also just to learn more about device trees. I am currently using a BeagleBone Black image, and I ...
0
votes
0
answers
511
views
u-boot disable console output log message
i have orangePI_pc_plus board and installed armbian on it and connected monitor via HDMI and i hide all kernal logs to it.
the problem is that i still see those u-boot message logs
i want to hide it ...
0
votes
0
answers
183
views
How to run U-Boot Falcon mode from eMMC on BeagleBone Black
Warning: there is a bit of a long log in this reply. Here is what I'm attempting to accomplish:
Store U-Boot environment variables in eMMC.
Boot Falcon mode from eMMC.
Keep my Debian version, custom ...
- 21
1
vote
2
answers
101
views
U-Boot errors when trying to enable Falcon mode on BeagleBone Black
I have been having trouble enabling Falcon mode on the BeagleBone Black. I have a working U-Boot (v2019.04) and Linux (Debian 11.5, kernel v5.15.65-bone-rt-r30), but I have been unsuccessful thus far ...
- 21
2
votes
1
answer
102
views
AM335x - Custom Board <SEGV> when running Systemd
I tried asking my question on TI's forum, but I am not getting much feedback, so I thought I'd try my luck here.
You can see my ongoing discussion with TI here: https://e2e.ti.com/support/processors-...
- 41
0
votes
0
answers
125
views
Difference between compressed and uncompressed kernel image written in the SPI flash RAM
Is there any difference between compressed and uncompressed kernel image written or flashed into the flash RAM with U-Boot loader? I have an embedded system that has 4MB capacity SPI flash RAM and ...
- 29
1
vote
1
answer
587
views
TFTPboot using Uboot : TFTP server on Windows
I have a TFTP server running on Windows-10 machine.
I am using MobaXterm it has TFTP server.
I tested client server running on same windows 10, machine, able to communicate.
TFTP -i 192.168.1.7 get ...
- 191
1
vote
0
answers
197
views
DRAM problem with an fit image of increasing size
I have a 512 MiB ram capacity on a proprietary board with the Zynq700 SoC. This corresponds to the address range [0x00000000,0x20000000].
I run a ram-based operating system on it and it works fine ...
1
vote
0
answers
163
views
How to build a newer version of u-boot for the cpu exynos 5250 of the Google / Samsung ARM chromebook "SNOW" model XE303C12
I'm trying to build a recent copy of the u-boot loader to use with my old google-samsung ARM chromebook snow. Until now I've used the copy created by the company virtualopensystems,located here :
http:...
- 495
1
vote
1
answer
249
views
How the startup code access the filesystem to load the kernel under /boot directory to RAM when the filesystem is mounted by the kernel?
The kernel is usually located under /boot directory. When the startup program runs (like u-boot), it loads the kernel into RAM.
This means, u-boot already has access to the filesystem.
I'm confused ...
- 633
0
votes
1
answer
312
views
Can I boot my board from built-in emmc while the sd-card plugged in?
This is kind like a U-Boot related question. I'm not quite sure which site should I post to, but as I boot Ubuntu, I post it here.
Basicly, I bought a cheap Nanopi Neo Air with Allwinner H3 SOC. I'm ...
1
vote
1
answer
223
views
Defining console port in ARM kernel image
I have an ARM Dev board using an RK3566 CPU that I'm building a kernel for.
I would like to control the board using the UART connector. This works during U-Boot process, but my issue is that when I ...
- 23
1
vote
0
answers
511
views
/aliases: Reference to non-existent node or label "mmc0"
I'm trying to upstream support for u-boot and buildroot for a SoC, I'm merging some changes into master from the vendor's BSP and am having some issues with their dts.
[machinehum@whitebox u-boot]$ ...
- 11
2
votes
0
answers
693
views
System is booting to "emergency/rescue mode"
This may not be the issue with Yocto itself but rather related to properly booting up Linux on Avenger96(STM32MP1) board. I am currently working on Avenger96 with Yocto(Dunfell). Aim is to implement ...
- 203
1
vote
0
answers
120
views
U-Boot: is it possible to implement bootcount using a SPI EEPROM?
I'm referring to the u-boot bootcount/Kconfig for options to implement a boot counter. Options include DM_BOOTCOUNT_SPI_FLASH and DM_BOOTCOUNT_I2C_EEPROM. As it happens we will have a SPI EEPROM ...
- 547
0
votes
1
answer
1k
views
Why am I not able to load files from a partition with U-Boot?
For some reason, my U-Boot does not seem to be able to load files from my FAT32 partition:
=> mmc part
Partition Map for MMC device 1 -- Partition Type: DOS
Part Start Sector Num Sectors ...
- 33
0
votes
1
answer
989
views
What does LOADADDR=0x20008000 mean in linux kernel make command?
I'm learning about u-boot. using qemu model, I could (using qemu) load the Image on memory location I want and I could run the kernel booting using booti addr command. As you know in arm64, there is ...
- 367
1
vote
0
answers
139
views
Freescale armhf iMX6Q board doesn't boot with kernel 5.10 or greater
I am upgrading the kernel from version 3.17.0-rc4 to latest kernel version in a board that uses a iMX6Q Freescale processor, but the board doesn't finish to boot.
I am cross-compiling using Debian 10 ...
- 11
0
votes
1
answer
484
views
How to install Das U-Boot legacy boot in x86 IBM-PC?
Das U-Boot is both first and second stage bootloader, as FSBL in a IBM-PC it must fit into the first 446 bytes (or less) before MBR in the first sector.
There is also a 1.5 stage boot loader that uses ...
- 606
0
votes
1
answer
269
views
Cannot disable metadata_csum from buildroot configuration
I'm trying to boot STM32MP157A-DK1 with a Buildroot image that I made but I got this error and I cannot disable the metadata_cesum from the Buildroot configuration.
I tried
...
- 11
1
vote
1
answer
153
views
Failed to boot STM32mp157a-dk1 using a buildroot image
I'm trying to boot an STM32MP157a-dk1 using an image that i made with buildroot but when i boot i got this message :
Unable to write "/uboot.env" from mmc0:4
Help me please !!
H.M
- 11
1
vote
0
answers
254
views
How to find out if the whole Kernel was loaded into the RAM
I have a custom board with a NOR-flash, DDR3, eMMC and CPU.
Uboot is working fine and I can download/upload the linux kernel to the eMMC. When I run the application the Kernel gets booted only past ...
- 11
0
votes
1
answer
446
views
Enabling second UART in U-Boot
I am working on a project with SAMA5D3-xplained board with CortexA5 processor and embedded Linux. I would like to send and receive some data via UART during U-Boot is running and before a kernel is ...
- 23
1
vote
0
answers
256
views
U-Boot, Boot and DTB
Im slightly confused how things are working UBoot Boot and DTS.
I have SBC Mecool VS RK3399 and producer does not support it at all I wanted still make use of it. Fortunately I have found that ...
- 11
1
vote
1
answer
990
views
Linux kernel panic when I disable the console via cmdline?
I currently have an embedded device booting via mainline U-Boot in to the mainline Linux kernel (built via Buildroot). This works fine and the board functions as intended.
One option I would like is ...
- 11
1
vote
0
answers
566
views
Definition and usage of Kernel/Linux DTS file with more than one MIPI DSI Display panel
I actually need some help of defining the kernel/linux DTS file and use it together with the uboot videoargs.
In use is the 5.4.47 uboot and kernel/linux from a NXP imx8m YOCTO project.
In uboot I ...
- 11
0
votes
1
answer
928
views
U-Boot Compile Error on Ubuntu 20.04.1 LTS
I've been following this tutorial on how to set-up a basic boot loader configuration on an embedded system. I've been stuck on the U-boot part owing to not being able to build it.
Downloading U-boot
...
- 1
0
votes
1
answer
1k
views
How to unzip the U-boot image?
I have the U-boot image called:
rootfs.13cy.initramfs.bzip2.uboot
I want to see what's inside of it.
Whats dumpimage cmd shows me:
dumpimage -l rootfs.13cy.initramfs.bzip2.uboot
Image Name: ...
-1
votes
1
answer
6k
views
u-boot stuck at Starting Kernel
My Target Setup:
SOC: STM32H743 (Cortex m7 single core)
Internal Flash: 2MB
Board: Waveshare CoreH7XXI
On-board DRAM: 8MB, Start_Address: 0xd0000000, Size_in_bytes: 0x7A1200
SDCARD: 1GB
Bootloader: ...
0
votes
0
answers
704
views
Why uboot x86_64 can not boot alpine vmlinuz-virt, reset after boot
qemu-x86_64 uboot.rom with Alpine's virt
get vmlinux
wget https://mirrors.aliyun.com/alpine/v3.12/releases/x86_64/netboot/{vmlinuz,initramfs}-virt
now boot qemu
qemu-system-x86_64 -m 1024 -smp 2 -...
- 456
0
votes
0
answers
853
views
How to install grub bootloader as second stage bootloader
As you know grub bootloader supports arm architecture on recent versions,but it demands EFI ,thing that is unavaible on most arm base single board computers (SBCs) and they use U-boot instead of EFI ...
- 99
2
votes
0
answers
765
views
Memory node of device tree in /proc doesn't match dtb
I'm trying to modify the memory node in a device tree for a zynqmp zcu102 board. However, something seems to be overriding this node somehow.
I'm booting using a FIT image and u-boot. I've confirmed ...
- 144
0
votes
1
answer
604
views
** File not found /boot/uImage ** When using Angstrom Pre-built Images on BeagleBoneBlack Rev C
I'm trying to boot my BeagleBone Black into Angstrom using pre-built images found here.
My SD card has two partitions BOOT & ROOTFS, and was formatted according to the procedures found here.
...
- 47
1
vote
2
answers
6k
views
U-Boot "Wrong Ramdisk Image Format" with initramfs on BeagleBone black
I am following the book "Mastering Embedded Linux Programming - Second Edition" trying to boot up the Linux kernel mounting a ramdisk.
I have U-boot 2020.01 working and the Linux kernel ...
- 13
1
vote
0
answers
465
views
How to flash SPI NOR and read back from the SPI Nor - Microzed Zynq from Uboot?
I am trying to read the kernel image from the mmc card and flash it on the SPI Nor flash. My kernel image is uImage only.
So, I read the kernel image from mmc card and put that into the memory ...
- 189
0
votes
0
answers
210
views
How to enable fastboot in u-boot for am335x-evm-sk in PROCESSOR-SDK-LINUX-AM335X-EVM
I need a step by step procedure for enabling fastboot in am335x-evm-sk in Linux (not Android!).
Firstly, how can I enumerate the u-boot as a usb device?
Then, how can I make it a fastboot device?
The ...
0
votes
0
answers
277
views
Flashing Uboot Image to SD Card
I am trying to flash the uBoot image of MIPS based processor however I dont see anything written to the SD card.
I determined the mount location of the SD card using the following command
lsblk
...
- 103