A family of processor architectures used in many embedded applications, network and other appliances, and almost all smartphones.

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37
votes
2answers
18k views

What do the flags in /proc/cpuinfo mean?

How can I tell whether my processor has a particular feature? (64-bit instruction set, hardware-assisted virtualization, cryptographic accelerators, etc.) I know that the file /proc/cpuinfo contains ...
10
votes
1answer
4k views

How can I test the RAM for data corruption on an ARM-based system?

I have an embedded device. It is ARM based, with Linux 2.6.31 and has 256 MB RAM. I wanted to get some ideas/tips on what is the most effective way to test the device RAM for data corruptions. Is ...
8
votes
3answers
9k views

How can I chroot into a filesystem with a different architechture?

I'm trying to chroot into a Arch Linux ARM filesystem from x86_64. I've seen that it's possible to do using static qemu by copying the binary into the chroot system: $ cp /usr/bin/qemu-arm ...
7
votes
1answer
2k views

Running Debian i386 binary on Debian armel via qemu

I am trying to follow this guide to set up a Ventrilo server on my SheevaPlug, running Debian armel. This page states that I can use QEMU to run the binary that was made for i386 on my arm system. ...
6
votes
4answers
1k views

Looking for ARM- or MIPS-based computer (netbook or similar size) to play with

I am bored and want to play with a netbook or other small computer. Can anyone recommend something? Requirements: ARM or MIPS CPU Can run Windows CE 6 and/or Linux (preferably dual-boot) Linux ...
6
votes
1answer
375 views

Linux kernel 2.6 on ARM

I have compiled and installed the 2.6 kernel on an ARM board. I am using the ARM mini2440 board. I would like to know if there is already a way to access the General Purpose I/O port pins? Or will ...
6
votes
1answer
681 views

CLFS: Building GCC cross compiler

Currently I try to build a embedded Linux from scratch with the instructions from Cross Linux from Scratch. Everything worked fine until I tried to compile the GCC Cross-Compiler. I want to build the ...
6
votes
3answers
237 views

Can I install PHP on a Chumby One?

I'm enjoying hacking my Chumby One. However, I'd prefer if I could run PHP on it. I have perl and python installed. Does anyone know if I can compile PHP for it or if there is a ready made distro for ...
5
votes
3answers
8k views

How to use /dev/fb0 as a console from userspace, or output text to it

So I have a Palm Pre (original P100EWW) model that I enabled developer mode on, and installed a Debian Squeeze chroot. Works great. I have plans to use this for ANYTHING (bittorrent peer, web ...
5
votes
2answers
865 views

ZONE_NORMAL and it's association with Kernel/User-pages?

Above is presented a case where I have only 512 MB of physical memory. What I have read up so far, is that ZONE_NORMAL is mapped to the kernel virtual address space as shown. Essentially I have a ...
5
votes
1answer
334 views

Embedded linux LCD not calibrated

I have attached a new LCD to my embedded Linux device and when I run the system I found that it is shifted to the right. (the display starts from the middle of the LCD) I found 2 frame buffer drivers ...
4
votes
4answers
2k views

Linux on a tegra tablet for programming

I would like to use a tablet for some mobile programming. It would be nice to read a pdf and immediately try the code on the same device. I've found various videos and tutorials how to get Ubuntu ...
4
votes
1answer
357 views

Backporting OpenSSL-1.0.1e to Debian Lenny (armv4l)

I have an old embedded board that supports only Debian Lenny. I need to install OpenSSL-1.0.1e on it. If I download the source code then try to compile the source code, I get this error ...
3
votes
2answers
183 views

Is there a different linux kernel for different architectures?

If I want to build a custom kernel for an ARM architecture, do I need to : a) Download the kernel from kernel.org, make changes to the kernel, build it using some cross compiler (like code sourcery ...
3
votes
7answers
588 views

Rebooting fails randomly

That is, the following command fails at times: $ sudo reboot The last message on terminal, after which the machine gets stuck, requiring a power cycle: Restarting system. I tried the following ...
3
votes
1answer
52 views

Embedded Linux: Which machine directory to pick in /arch/arm?

I am just starting out with embedded Android drivers, so any help would be great. I haven't found a lot of resources online. At the moment, I am working through a tutorial on porting a driver, and ...
3
votes
2answers
898 views

What difference is between ARM Debian for Raspberry PI and Ordinary debian x32/X64 for desktop?

I would like to know, how big is difference between ARM debian for Raspbery PI and x32/x64 debian for desktop. I would like to buy in future some ARM mini pc like raspbery PI and use it as for ...
3
votes
2answers
68 views

Headlessly Compiling and Uploading Arduino Programs on an armhf Platform

I'm currently running my Hardkernel ODROID U2 with the ODUINO One (Arduino Uno R3 & additions) in a headless setup and connect to the ODROID U2 via SSH over LAN. It is running Debian 7.1 armhf and ...
3
votes
2answers
551 views

GNU Radio prerequisite libraries on armhf

After several attempts, I have managed to compile GNURadio on the Raspberry Pi. However, I am just not able to meet the prerequisites for the gnuradio build script on the Pandaboard (Linaro 12.04) or ...
3
votes
2answers
966 views

How do I install a device driver provided as a .bin file?

I am a new Linux user and am struggling installing a driver for a usb WiFi device I want to use on an embedded system (BeagleBone). When I download the driver for the chipset (Ralink 2070), it is ...
3
votes
1answer
524 views

Is it possible to install a custom Linux on an Android phone?

I have an Xperia X8 phone, and I'd like to know if I can install a non-Android Linux OS on it? I would like to have a light Linux Distro, like Kolibri or something like that.
3
votes
2answers
531 views

shared library not found even with ld.so.conf updated

$ sudo ldconfig -v|grep libOpenNI 355: libOpenNI2.so -> libOpenNI2.so but when I am executing the program I'm getting ./SimpleRead: error while loading shared libraries: libOpenNI2.so: cannot ...
3
votes
1answer
129 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 ...
3
votes
0answers
101 views

Getty not starting in qemu

I'm trying to get running an ARM based Debian inside qemu. As a rootfs I'm using structure from embeddedarm 2gb sdcard image with versatile 2.6.24 kernel downloaded from fedora qemu tutorial site. At ...
3
votes
0answers
138 views

Exynos 5 DVFS or turning off cores in Ubuntu - Scaling frequency for one of the cores only (dual core) (cpufreq)

I was wondering if there is possible to scale only one of the cpu cores in the A15 in Exynos 5 ? I have tried using e.g cpufreq-set -c 1 -f 500MHz, but both cores are set to the same frequency. When ...
3
votes
1answer
315 views

Cross-compile FreeBSD package as unprivileged user

My goal is to cross-compile binaries from an amd64 FreeBSD host to an armv6 RaspberryPi FreeBSD target. The problem I am running into is I am required to be root in order to make install, where my ...
3
votes
0answers
189 views

My SMDK2416 (for s3c2416) kernel works on 64MRAM but crashed on 128M

I'm currently working on embedded arm linux with smdk2416(s3c2416) The kernel is working on the 64MRAM. Recently, I need to increase the RAM from 64M to 128MB with 64MB on bank0 and 64MB on bank1. ...
3
votes
0answers
131 views

Implement Java/JavaFX on ARM

I am working on ARM Linux. I have found this link that says that JavaFX could work on ARM. I am confused about Embedded Java SE and JavaFx ARM. Do I need to setup a JVM for those or not? I have ...
3
votes
1answer
483 views

Set GPIO permissions cleanly

Can the default permissions and ownership of /sys/class/gpio/ files be set, e.g. by configuring udev? The point would be to have a real gid for processes that can access GPIO pins on a board. Most ...
3
votes
0answers
397 views

Toshiba Drive Sleeping - SDPARM

My toshiba 1tb external keeps going to sleep and I can't seem to locate anything that resembles a standby parameter. Does anyone know a way to get this drive to quit sleeping? Here is the output of ...
2
votes
2answers
1k views

Linux and Android apps on ARM vs x86

There are a plethora of low-cost ARM-based mini-devices coming out (Cotton Candy, etc). Some of these are Android-only, some Linux-only, and some allow both operating systems to run. The only issue ...
2
votes
1answer
2k views

Can one install an armel Ubuntu package on armhf Ubuntu system?

My particular concern is about installing "coq" in Ubuntu 12.04 for Toshiba AC100 (armhf distro), which hasn't been built successfully for armhf, but is available for armel -- ...
2
votes
1answer
963 views

Installing a cross-toolchain to build ARM binaries on Debian

I tried to install a cross toolchain so I could build Linux kernel on amd64 (Debian testing "jessie") for my ARM system. I have this entry in sources.list: deb http://www.emdebian.org/debian sid main ...
2
votes
2answers
581 views

Joli OS on ARM devices

I didn't really know where to ask this question, so since Joli OS uses the linux kernel and they don't seem to have a forum here I go. All the official information I could gather says it doesn't work ...
2
votes
2answers
75 views

Setup ntp client with embedded device

I need to run an NTP client on a very limited embedded device. ntpd is available but I do not see anything like rc.conf, or ntp.conf, or xntp.conf? Can someone advise on how to setup NTP? I ran ...
2
votes
1answer
247 views

truecrypt 1: Syntax error: “(” unexpected

I want to use truecrypt on a Linux machine. It is CLI mode only. So I downloaded the x64 and x86 and tried or run the extracted executable file for each version (x64 & x86), but it doesn't work. ...
2
votes
1answer
2k views

Adding ssh on embedded linux

I want to run SSH on Qtopia (on my FriendlyARM). My own distribution is Ubuntu, so I cannot copy and paste the ssh binary file into the device. If I can copy and paste a binary file, where can I find ...
2
votes
1answer
89 views

How to build a basic embedded linux on a Qualcomm router?

Not knowing the first thing on how to build a minimal linux system on an embedded device, I'd like to get some pointers in the right direction. Generally speaking, I'd like to know what are the ...
2
votes
1answer
98 views

Cross compile libzdb library for ARM9 architecture

I am using AM1808 ARM9-based micro processor for my project on Ubuntu v10.04 using G++ compiler. I am using sqlite3 database for data management. My application needs multiple simultaneous access to ...
2
votes
1answer
587 views

Installing Linux on the TI-nspire

I am having trouble installing Linux on my TI-nspire cx cas graphing calculator. I downloaded the files and the Linux image. I have read several websites on the topic but it was not that much help, ...
2
votes
2answers
3k views

Correct use of TZ, date, and hwclock?

I'm working on an Buildroot developed ARM/ulibc Linux distribution for a custom board. I'm trying to understand the relationship between If I do this, as I've seen on a few examples online: # date ...
2
votes
1answer
1k views

How to debug Linux kernel panic?

I am trying to debug a kernel panic. Panic message says unable to handle kernel paging request for address 40025694. At the time of panic it was executing ldreq r10, [lr, #-4] @ get SWI instruction. ...
2
votes
1answer
784 views

Chromium browser displays blank screen

Xubuntu 11.10 oneiric armel Asus eee pad slider sl101 nvidia-tegra 2 arm tablet chromium browser 18.0.1025.151 Browsers which work fine are: Midori Epiphany Firefox Opening a link in ...
2
votes
1answer
4k views

How can I install Skype in Ubuntu on ARM?

I wonder how to install and use Skype in Ubuntu (12.04) on ARM architecture (my Toshiba AC100, which originally ran Android). I suppose there must be Skype builds for Linux on ARM: for Android, and ...
2
votes
2answers
357 views

How do I use pacman on a loop-mounted Arch image for a different architecture?

I would like to install some packages on an ARM image before flashing it to an SD card. So far, I have loop mounted the image sudo mount -o loop,offset=99614720 archlinuxarm-13-06-2012.img /mnt and ...
2
votes
1answer
135 views

apt-show-versions - Maybe no deb entries

When installing Ajenti I get this error: Error: No information about packages! (Maybe no deb entries?) E: Problem executing scripts APT::Update::Post-Invoke-Success 'test -x ...
2
votes
1answer
154 views

QEMU for ARM programs with GDB [closed]

I want to emulate an ARM processor for running the assembly programs using QEMU in RHEL. I have installed QEMU but I still have problems in running the assembly program. I got the assembly program, ...
2
votes
0answers
98 views

Why does my Pandaboard boot partition need to be vfat, and the rootfs need to be ext3 or ext4?

While booting Android on a Pandaboard, I am partitioning the SD card into two partitions, boot and root. They contain different filesystems. Why does the boot partition need to be vfat, while the ...
2
votes
2answers
3k views

Cross compiling expect for ARM

I have downloaded expect5.4 . I'm trying to cross compile it for ARM(PandaBoard) running stripped down version of linux. In the initial setup of configuring , I try Shell$ ./configure --host=ARM ...
2
votes
0answers
534 views

Qemu doesn't boot kernel after “Uncompressing Linux… done, booting the kernel. ”

I've compiled qemu for s5pc110 (it's from http://gitorious.org/samsung-linux-platform/qemu, somebody had added support for s5pc110), version 0.12. But when I load the kernel: qemu-system-arm -M ...