Das U-Boot (The Universal Bootloader) is an open source, primary boot loader.

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Redundant U-Boot images

I'm currently working on an embedded system which uses a NAND flash as it main storage. Bootloader + Kernel + rootfs are written to it, and we are looking for ways to make our system more robust to ...
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0answers
16 views

How to play a beep/sound file from the u-boot for Panda-board?

I want to play a Beep/Sound file during the boot up from the u-boot on the speakers connected to panda-board. As this functionality is there in PC ,How to replicate the same on the embedded platform ...
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2answers
2k views

File system CRC check

I know that before running the kernel, u-boot (the boot loader) will check the kernel image CRC. Only if it is correct it will go further, else it will give a "Bad CRC" error. I want to do same thing ...
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1answer
266 views

kernel panic not syncing: vfs :unable to mount root fs on unknown block(31,1)

I am trying to boot linux from flash on an powerpc board. In u-boot I set bootargs with: setenv bootargs root=/dev/mtdblock1 rootfstype=ext2 rw console=ttyS0,115200 ramdisk_image=\${rd_size} I also ...
3
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2answers
965 views

How to make sd card as default boot in uboot?

U-Boot 2013.07 (Nov 21 2013 - 18:12:40) Memory: ECC disabled DRAM: 1 GiB MMC: zynq_sdhci: 0 SF: Detected N25Q128A with page size 64 KiB, total 16 MiB In: serial Out: serial Err: serial Net: ...
2
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1answer
2k views

Understanding SPL & U-Boot Memory Map using bdinfo?

We are using beaglebone black based custom board, I want to write some test results into RAM location from SPL, and read that log and send it via tftpput to the host PC. So far I'm able to do tftpput ...
3
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2answers
4k views

How to create boot SD card for Banana Pi manually

It seems that I have a lack of understanding how booting SD-Card images on devices like the Banana Pi work. The situation is as follows. I have a Banana Pi and a Banana Pro. Every device has an ...
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1answer
1k views

U-Boot Bootup error

I'm running a Debian Linux on a Cubietruck, running off a SD card. When I power on, I get the following error: ## Booting kernel from Legacy Image at 46000000 ... ...
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1answer
44 views

How to create a U-boot Image?

I have U-Boot source files and GCC-4.9.3 and I want to create U-Boot image for wandboard and I am using following commands: export PATH=$PATH:"address of arm-none-eabi" export ...
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2answers
32 views

U-boot make march error

After following the instructions here, http://elinux.org/RPi_U-Boot, for setting up U-Boot, I am getting the following error when running the command make -j8 -s cc1: error: bad value (armv5) for ...
0
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1answer
19 views

Extlinux.conf on separate partition?

I'm trying to configure a system with separate boot partition, booted with U-boot and extlinux loader. Could I locate extlinux.conf on separate partition, but kernel (zImage) and device tree on root ...
3
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1answer
95 views

FDT relocated by U-Boot cannot be accessed by Linux (in highmem)

We run a customized version of U-Boot on an ARM-based embedded system and would like to load Linux 4.3 with a device tree blob. The system features 1GB of RAM of which the top 128MB are reserved for ...
4
votes
1answer
539 views

What does this dd command do exactly?

I have an embedded device with this SD card: [root@(none) ~]# busybox fdisk -l Disk /dev/mmcblk0: 3965 MB, 3965190144 bytes 4 heads, 16 sectors/track, 121008 cylinders Units = cylinders of 64 * 512 = ...
3
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1answer
655 views

ERROR: image is not a fdt - must RESET the board to recover

I am attempting to boot the freescale 1040RDB and am having some difficulty. I'm using a pre-built SDK from Freescale that has a linux VB image with the yocto installation along with all of the yocto ...
0
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1answer
295 views

gcc: error trying to exec 'cc1': execvp: No such file or directory

When trying to run make -j2 -s as instructed from this guide, I am getting the following error. gcc: error trying to exec 'cc1': execvp: No such file or directory Any idea what I have done ...
5
votes
1answer
101 views

Applying device tree overlay

I have a device based on imx233-Olinuxino-Nano. The Arch Linux Arm distro boots and works. However, there is a slave device on my board that is connected to SPI of CPU. It is supported by kernel, ...
0
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1answer
99 views

What do I put in /etc/fw_env.config when using Debian Jessie's u-boot-sunxi-with-spl.bin

I'm trying to move my exsting armhf Debian Jessie setup from a CuBox to a BananaPro. I've copied the u-boot-sunxi-with-spl.bin from the u-boot-sunxi package to an offset 8k from the start of the ...
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3answers
5k views

tftpput in U-Boot: error: 'Access violation' (2)

I have enabled CONFIG_CMD_TFTPPUT in U-Boot, but I am not able to use it. I have set the serverip and ipaddr environment variables. When I use it as follows, it times out: u-boot# tftpput ...
0
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1answer
269 views

Editing make process?

So.. I figure this is alright to ask around here. https://github.com/swarren/u-boot — I have this, need to get the binary so I can finally run something other than Raspbian on the Pi. The ...
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2answers
1k views

Uboot passes arguments to kernel!

How can uboot pass command line argument to kernel? I did some googling and got to know that it uses the bootargs environment variable. There it was mentioned that setenv bootargs key=value. Since I ...
0
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1answer
82 views

U-Boot and armhf installation

I am currently trying to install ANY linux distro onto an external HD. My goal is to boot using the external device, but my problem at the moment is that I am unable to achieve this. I try to boot ...
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2answers
2k views

Restricting memory area for linux kernel

I am running ltib Linux on P1022RDK (P1022 Core) platform. I have 512 MB = 0x20000000 memory. I want my Linux kernel to use the second half of the board memory (i.e from 256 MB to 512 MB) and want the ...
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1answer
358 views

uboot & uImage & linux boot process

Usually, in embedded systems the NAND flash is partitioned in four parts:-- A partition for the bootloader (here goes uboot.bin) A small partition where uboot saves its environment variables A ...
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200 views

Procedure to figuring out U-Boot environment location from binary/hex dump

TL;DR: I have a u-boot (version 1.6.1) enabled board, I have dumped the partition that contains the environment variables to a binary file using dd and now am stumped at finding out how to translate ...
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83 views

Debian 8.1 with Uboot bootloader cannot run FSCK on reboot

I am running Debian 8.1 on an SD card on a Banana PI with U-boot bootloader. I'm trying to force my system to run fsck on reboot, but no matter what I do, nothing happens. Here are what I have tried ...
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2answers
669 views

NFS root filesystem doesn't mount at boot

This is an embedded device with a custom kernel (see below for relevant config). It's an x86-32 machine booting like this: coreboot->uboot->linux. I can mount the NFS share in linux if I use ...
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55 views

Move/Change boot file system

I have a webcam Sunluxy 720p and I need to adapt the configuration to my needs. The / file system is read-only. I have access to u-boot via UART/USB cable. I can also connect via telnet as root. ...
2
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1answer
41 views

boots from usb but uses internal hd as sda1

I am currently booting a kernal (via uboot) from a usb drive which works fine. The issue I am having is when the SSD is plugged in it uses the SSD as the sda1 and i have to unplug the SSD for the usb ...
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0answers
65 views

U-Boot: Changing TTY columns and rows for virtual consoles

Having installed GRUB as boot manager allows the operating system (Linux) to boot on specific video mode so the TTY virtual consoles change its columns and rows (width and height). For example, ...
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1answer
19 views

Do less severe log level INCLUDE more severe log levels?

Will loglevel=7 include the logs, for example, that would be produced by loglevel=0? http://www.makelinux.net/ldd3/chp-4-sect-2
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1answer
1k views

Is vmlinuz and bzImage really the same?

I just stumbled upon this page, which says that bzImage and vmlinuz are identical. bzImage is then copied using the cp (i.e., copy) command to the /boot directory and simultaneously renamed ...
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42 views

Memory dump with u-boot on conga-QMX6

I'm starting work on a preconfigured (working) system based on conga-QMX6 (with ubuntu and u-boot). Before start changing the system I want to make a complete dump of memory for restore it if ...
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0answers
120 views

How does rootfs.ext3 image file work?

I have a FriendlyARM mini6410 device and I have just hardly make it boot from sdcard. Now my sdcard uses "u-boot for mini" (u-boot.bin), "linux2.6.38 kernel" (zImage) and "rootfs qtopia fs" ...
2
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3answers
114 views

Create cpio file with different absolute directory

I am trying to modify a file system image packed with cpio. For that reason I first need to extract and later pack the image. As the image contains a whole file system all the files are given in ...
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0answers
180 views

mmc error during am335x boot “mmc_send_cmd : timeout: No status update”

We are using Beaglebone black based (am335x) custom board, We are using eMMC for our board. While booting U-Boot shows error/warning, mmc_send_cmd : timeout: No status update U-Boot ...
3
votes
1answer
1k views

FreeBSD on Raspberry Pi2

I want to build FreeBSD custom Image for my Raspberry Pi2. I have read about the boot process in RPi2. I also went through the chrochet build instruction document. I learned from some websites that ...
5
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1answer
3k views

Kernel booting stops right after “Uncompressing Linux…”

I'm trying to bring up an ARM-based board. I've got U-Boot working but can't seem to get the kernel to load. Most of the time it only goes as far as: Starting kernel ... Uncompressing Linux... A ...
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0answers
302 views

How to run Ubilinux / u-boot under qemu (x86)

I wish to test Ubilinux (http://www.emutexlabs.com/ubilinux) before flashing it onto my Intel Edison board, which currently has Yocto on it. I am able to emulate Yocto for Edison with qemu, running ...
0
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1answer
104 views

FDT and ATAGS support not compiled in - hanging ### ERROR ### Please RESET the board ###

I'm following the tutorial from the below mentioned website to install Linux on SoCkit by Terasic: https://zhehaomao.com/blog/fpga/2013/12/24/sockit-2.html. This is my first time building a Linux, ...
2
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0answers
71 views

configure port for dhcp request in uboot

We are fetching ip using DHCP in u-boot. we need to send via same interface (eg eth1) every time. but DHCP request sent via any configured interface(eth1/eth2..). How can we configure u-boot to send ...
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0answers
76 views

Is it possible to use u-boot or redboot to boot a linux (minimal ubuntu) image on x86_64?

I am reading conflicting information about if this is possible or if it is a bad idea. I have used u-boot with Pandaboard but obviously this isn't x86_64 architecture. I have not seen any examples ...
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1answer
154 views

problem with U-boot while flashing Linux in sd-card

Please help as it is immense necessary for a project which is to be evaluated coming week. Also, I am very new to this and unable to find help from existing contents available on the Internet. While ...
3
votes
1answer
4k views

How do I tell which device tree blob (dtb file) I'm using?

I'm working with TS-4900, an embedded 'Computer on Module' plugged into a baseboard, running Yocto Linux. It uses U-Boot to start, and supposedly basing on the model of the baseboard it chooses the ...
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0answers
230 views

How to quote the quote marks in strings in u-boot?

Currently my boot string (displayed with env print) is: If I want to set a variable to a string in u-boot, I do env set variable 'my string' But what to do if the string contains the quote ...
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1answer
223 views

Re-enabling the console once the kernel is up, if silent mode was set in Uboot?

I have enabled the silent mode by setting the U-boot env variable "silent". Uboot-> setenv silent 1 Uboot-> saveenv Now, I would like to re-enable the console once the kernel is up. Can ...
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0answers
938 views

Can a zImage be used with U-Boot and ArchLinuxARM?

I am using U-Boot on a Cubieboard 2, sun7i AllWinner A20 board to boot into ArchLinux ARM. The kernel version that I have is the sun7i latest, which is 3.4.103-5-ARCH so, in kernel terms, it's a bit ...
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2answers
2k views

Bootloader fails to load linux kernel

I upgraded linux kernel from 2.6.32 to 3.0.7 but now bootloader isn't able to load the kernel image. Specifically, boot procedure freezes after: Starting kernel ... Uncompressing Linux... done, ...
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0answers
547 views

Kernel panic - not syncing: No init found

I am trying to build the linux kernel image for the Beaglebone black right from scratch! i am following the tutorials referred by Free-electrons(http://free-electrons.com/training/kernel/) I am ...
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1answer
79 views

U-boot static IP doesn't seem to “apply”

When I enter the command setenv ippaddr xxxx.xxxx.xxxx.xxxx it doesn't seem to actually connect to the network on that address. I have a private network set up with the address in the same subnet ...
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2answers
378 views

Trying to understand uboot image copying

The following is snippet from u-boot-xarm/include/configs/zynq_zc702.h "qspiboot=echo Copying Linux from QSPI flash to RAM...; \ cp 0xFC100000 0x8000 ${kernel_size}; \ ...