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

learn more… | top users | synonyms

0
votes
2answers
23 views

Uboot pass arguments to kernel!

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

Editing make process?

So.. figure this is alright to ask around here. https://github.com/swarren/u-boot have this, need to get the binary so I can finally run something other than Raspbian on the Pi. The instructions ...
0
votes
0answers
20 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 ...
0
votes
0answers
30 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
votes
3answers
48 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 ...
0
votes
0answers
21 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 ...
2
votes
0answers
89 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 ...
2
votes
2answers
339 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 ...
2
votes
1answer
113 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 ...
0
votes
1answer
53 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, ...
1
vote
1answer
186 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 ...
2
votes
0answers
35 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 ...
0
votes
0answers
32 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 ...
2
votes
0answers
61 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 ...
1
vote
1answer
771 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 ...
3
votes
1answer
880 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 ...
0
votes
1answer
171 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 ... ...
1
vote
1answer
86 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 ...
3
votes
0answers
356 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 ...
2
votes
1answer
259 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
votes
0answers
402 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 ...
1
vote
1answer
105 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 ...
0
votes
0answers
41 views

Linux Booting from NAND instead the uSD

I have some trouble with booting up my zImage. I'm using CORE9G25. So, usually I boot up using the uSD. And after uncompressing the linux and etc it's working. But, after I moved the uSD to the other ...
1
vote
1answer
61 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 ...
0
votes
0answers
63 views

How can I show battery percentage at u-boot?

I am checking the battery level from my sensor and able to display a static 'low battery' or 'in charging' image.How or what approach should I take to show the level of battery percentage through ...
0
votes
1answer
158 views

How to recover firmware on a embedded device with corrupted u-boot and kernel image? [closed]

My embedded device is not working after updating firmware. Thus I tried to update firmware using u-boot. I could successfully get u-boot console via serial connection, but updating firmware failed due ...
0
votes
0answers
176 views

Beaglebone: Backup image mounts root as Read-only

After I had completed creating applications for my BB white (running ubuntu), I created a backup of the SD card using-> sudo dd if=/dev/disk2 of=/Volumes/BONE/bone_custom.img Recently, I tried to ...
1
vote
1answer
86 views

How to download original ramdisk file to the computer? [closed]

Linux embedded, is it possible to download original ramdisk file to the computer, to get source code? Access via SFTP. U-boot 1.2.0 Kernel command line: root=/dev/mtdblock3 ...
1
vote
0answers
154 views

Encrypt root file system and decrypt using U-Boot with key stored in FPGA

We are using Cyclone V, which essentially is a SOC comprised of FPGA + ARM core. Is it possible to encrypt the root file system and decrypt it by using U-Boot with a key which is located in the FPGA?
1
vote
1answer
890 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 ...
2
votes
2answers
4k 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 ...
2
votes
1answer
231 views

In u-boot why spi flash is probed twice?

This is a section of the log from u-boot running on Avnet Microzed board -ARM CORTEX A9: [Thu Jun 26 17:40:53.656 2014] [Thu Jun 26 17:40:53.656 2014] [Thu Jun 26 17:40:53.656 2014] U-Boot 2013.07 ...
1
vote
0answers
29 views

u-boot command description: mtdargs and boardsetup

Reading the readme.Falcon I found the following lines: uboot> run mtdargs addip2 addtty another command that is not working and I dont what it does is: fdt boardsetup When I treid to run ...
1
vote
2answers
420 views

How to find out the bad block table offset and how to change it in u-Boot

I am facing a similar problem as this: Kernel does not recognize nand bad blocks marked by u-boot I'm using a friendlyARM micro2440 board that contains the s3c2440 ARM processor. u-Boot has found ...
3
votes
1answer
1k views

Booting using initramfs instead of uramdisk

I am working on Zynq Microzed board. It is booting perfectly with uramdisk.image.gz but I trying to boot it with initramfs.cpio. In this regard I have made following changes in header files of ...
1
vote
1answer
276 views

How to get log from u-boot without com-port

U-boot is configured to print its logs into com-port by default. There is a device I can't receive this information (without uart/com). Can I configure u-boot to store its log strings into some place ...
0
votes
0answers
967 views

Booting linux image using u-boot SPL

OS: petalinux Board: Xilinx z702 evaluation board having ARM Cortex A9 and FPGA on the zc700 SoC Relevant question:: Why u-boot starts so late after I give power Background: I observed that first ...
1
vote
0answers
142 views

u-boot compilation error

I am trying to build u-boot and getting these error No private recovery resources for TARGET_DEVICE G0 Building U-boot make -C u-boot ARCH=arm fio-om3xxx_config make[1]: Entering directory ...
2
votes
0answers
47 views

Can I avoid writing to the screen until a couple seconds before X11 is initialized?

On an embedded device running Linux, I am writing to the monitor from the bootloader (U-Boot) to display a given logo. Once the linux kernel is loaded, however, it clears the screen until X11 is ...
4
votes
1answer
401 views

What does this dd command do exactly?

I have the 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 * ...
2
votes
0answers
111 views

Why u-boot starts so late after I give power

Running petalinux from sd card on ARM cortex A9 based zynq zc702 board. Zynq is an SoC with ARM and FPGA. Before the log messages (corresponding to u-boot) start printing, the screen (serail ...
0
votes
1answer
226 views

Disabling MMC in uboot

Following is the log message related to u-boot on Xilinx zynq platform: [Fri Apr 04 19:57:50.990 2014] U-Boot 2013.07 (Apr 04 2014 - 19:38:00) [Fri Apr 04 19:57:50.990 2014] [Fri Apr 04 ...
0
votes
1answer
737 views

Gem.e000b000 Waiting for PHY auto negotiation to complete… TIMEOUT?

The u-boot prints these before launching the kernel Gem.e000b000 Waiting for PHY auto negotiation to complete......... TIMEOUT ! BOOTP broadcast 1 BOOTP broadcast 2 BOOTP broadcast 3 BOOTP broadcast ...
0
votes
2answers
1k 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, ...
0
votes
1answer
288 views

How to verify that my uImage is good?

I had a zImage file and I used mkimage tool to convert it into a uImage format. When I am booting this file, it is not been found by u-boot: Wrong Image Format for bootm command ERROR: can't get ...
0
votes
0answers
2k views

Wrong Image Format for bootm command ERROR: can't get kernel image!

I keep getting this error when booting linux on ARM cortex A9 based xilinx chip: U-Boot 2013.07 (Mar 31 2014 - 16:34:50) Memory: ECC disabled DRAM: 1 GiB MMC: zynq_sdhci: 0 SF: Detected N25Q128A ...
2
votes
2answers
8k views

How to convert a zImage into uImage for booting with u-boot

I have a zImage that I want to boot using u-boot. I think zImage is not understood by u-boot,as I am getting the following error after uboot executes: Wrong Image Format for bootm command ERROR: ...
0
votes
2answers
171 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}; \ ...
1
vote
1answer
478 views

How to configure bootloader to boot the new kernel?

I succesfully upgraded linux kernel from 2.6.32.61 to 3.0.7 on BeableBoard-xM, following the steps below: download and untar kernel sources 3.0.7 from kernel.org copy kernel sources on /usr/src ...
2
votes
1answer
576 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: ...