PythonQ 248-8XX Dokumentacja

The DENX U-Boot and Linux Guide (DULG) form28Table of contents:1. Abstract• 2. Introduction2.1. Copyright♦ 2.2. Disclaimer♦ 2.3. Availability♦ 2.4. C

3.1. ELDK AvailabilityThe ELDK is availableon DVD-ROM from DENX Computer Systems• for download on the following server:FTP HTTPftp://ftp.denx.de/pub/e

# >filebash: file: No space left on device# mv file foomv: cannot create regular file `foo': No space left on deviceYou will have to use rm to

Everything: 24 kilobytes$ ls -l test.cramfs.img-rw-r--r-- 1 wd users 24576 Nov 10 23:44 test.cramfs.imgAs you can see, the CramFs image

9.1.5.2. Using UBI on NAND Flash:Erase the flash partition:root@generic-armv5te:~# flash_erase -q /dev/mtd4 0 0root@generic-armv5te:~#and attach it to

Present UBI devices: ubi0ubi0Volumes count: 1Logical eraseblock size: 126976 bytes, 124.0 KiBTota

Sub-page size: 2048 bytesOOB size: 64 bytesCharacter device major/minor: 90:8Bad blocks are allowed:

[ 161.550000] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048[ 161.550000] UBI: VID header offset: 2048 (aligned 2048), data offset: 40

[marex@pollux]$Note that for the NAND device we must pass the "-s 2048" option to ubinize; if we don't, an attempt to attachthe created

Everything in tmpfs is temporary in the sense that no files will be created on any device. If you unmount atmpfs instance, everything stored therein i

read-only ramdisk:#!/bin/sh...# Won't work on read-only root: mkdir /tmpfsmount -t tmpfs tmpfs /tmpfsmkdir /tmpfs/tmp /tmpfs/var# Won't work

root@generic-armv5te:/tmp/duts# mount -t vfat /dev/mmcblk0p2 /tmp/duts/mmcroot@generic-armv5te:/tmp/duts# mountrootfs on / type rootfs (rw)192.168.1.1

3.4. Supported Target ArchitecturesThe ELDK for ARM systems supports processors complying with the ARM architecture version 2 to 6. Thisincludes ARM7,

-rwxr-xr-x 1 root root 1152054 Feb 8 2012 slide-2.bmp-rwxr-xr-x 1 root root 1152054 Feb 8 2012 slide-3.bmp-rwxr-xr-x 1 root root 1152054 Feb 8 2

We recommend to store settings of brightness and contrast in U-Boot environment variables thatcan be shared between U-Boot and Linux. This way it is

Instead, we create a separate tarball which contains only the device entries so we can use them whennecessary (with cramfs):bash# tar -zcf /tmp/device

/dev/hda b 640 0 0 3 1 1 1 16/dev/kmem c 640 0 0 1 2 - - -/de

We now have a root file system image uRamdisk that can be used with U-Boot. 9.5.2. Root File System on a JFFS2 File SystemJFFS2 (Journalling Flash Fil

When booting the Linux kernel prints the following messages showing the default partition map which is usedfor the flash memory on the TQM8xxL boards:

Entry Point: 00000000 Verifying Checksum ... OK Uncompressing Kernel Image ... OKLinux version 2.4.25 (wd@xpert) (gcc version 3.3.3 (DENX ELDK

Many tools require some storage place in a filesystem, so we must provide at least one (small)writable filesystem. For all data which may be lost when

a 10 b 11 c 12 d 13 e 14 f 15 __EOD__ chmod 0666 /tmpfs/dev/*3. We can now create a cramfs file system image using the mkcramfs tool

$ mkdir rootfs$ cd rootfs$ tar -zxf /tmp/rootfs.tar.gzLike with the cramfs root file system, we use "tmpfs" for cases where a writable file

You can either download the ready-to-burn ISO-images from one of the mirror sites (see 3.1. ELDKAvailability), or you can download the individual file

d 13 e 14 f 15 __EOD__ chmod 0666 /tmpfs/dev/*Like we did for the ramdisk, we now create an ext2 file system image using the genext2fs tool:$

################################################################# #################################################################

Here is one possible solution: Your software distribution consistes of two files: The first file is the Linuxkernel with a minimal ramdisk image attac

$ genext2fs -U \ -d ${INITRD_DIR} \ -D ${INITRD_DEVICES} \ -b ${INITRD_SIZE} \ -r ${INITRD_FREE} \ -i ${INITRD_INOD

The first line says that it's a script file for the /bin/nash interpreter. Note: even if this file looks like a shell script it is NOT interprete

Board: TQM860LDB0A3-T50.202DRAM: 16 MBFLASH: 8 MBIn: serialOut: serialErr: serialNet: SCC ETHERNET, FEC ETHERNET [PRIME]PCMCIA: 3.3V card f

9.6. Root File System SelectionNow we know several options for file systems we can use, and know how to create the corresponding images.But how can we

What it is good for?In embedded systems the main use of mini_fo is to overlay the root file system. This means it is mountedon top of the regular roo

This is easy. Let's assume "/" is the read-only root file system and /dev/mtdblock5 contains a small JFFS2flash partition that shall be

Reading from files, creating new files, modifying already modified filesThese operations are passed directly through to the lower native layer, and on

The initial installation is performed using the install utility located in the root of the ELDK ISO imagedirectory tree. The install utility has the f

10. Debugging10.1. Debugging of U-Boot10.1.1. Debugging of U-Boot Before Relocation◊ 10.1.2. Debugging of U-Boot After Relocation◊ ♦ 10.2. Linux Kerne

136 asm volatile(" bl 0f" ::: "lr");(gdb) s137 asm volatile("0: mflr 3&qu

10.2.1. Linux Kernel and Statically Linked Device Drivers10.2.2. Dynamically Loaded Device Drivers (Modules)First start GDB in the root directory of y

Now you can list the source code of the module, set break points or inspect variables as usual:(gdb) l fun61 static RT_TASK *thread;6263 sta

(gdb) cContinuing.Breakpoint 1, fun (t=0x1) at ex_sw.c:6969 cpu_used[hard_cpu_id()]++;(gdb) p/d loops$2 = 999986939(gdb) p t$3 =

`add_sect .data`\ `add_sect .sdata`\ `add_sect .bss`\ `add_sect .sbss`\"echo "add-symbol-file $1 $ARGS" > ~/add-symbol-file.gdb10.4

10.5.2. Remote Debugginggdbserver allows you to connect your program with a remote GDB using the "target remote" command.On the target machi

It is convenient to use DDD, a Graphical User Interface to GDB, for debugging as it allows to define andexecute frequently used commands via buttons.

12.2.2. Linux kernelBooksKarim Yaghmour, Jon Masters, Gilad Ben-Yossef, Philippe Gerum: "Building Embedded LinuxSystems 2nd edition",Paperba

David R. Butenhof: "Programming with POSIX Threads", Addision Wesley, ISBN 0-201-63392-2.• Bradford Nichols, Dick Buttlar and Jacqueline Pro

To install a package, use the following command:bash$ ${CROSS_COMPILE}rpm -i <package_file_name>To update a package, use the following command:b

Gary R. Wright, W. Richard Stevens: "TCP/IP Illustrated, Volume 2 - The Implementation",Addision Wesley, ISBN 0-201-63354-X• W. Richard Stev

12.2.9. Power Architecture® ProgrammingBooksProgramming Environments Manual for 32-Bit Implementations of the PowerPC architecture:http://www.freescal

12.3. Mailing ListsThese are some mailing lists of interest. If you are new to mailing lists then please take the time to read atleast RFC 1855.linux-

Miscalleneous or unsorted material:BDI2000 List of supported Flash Memories: This document not only lists the currently supportedflash chips, but also

label = "bootloader"; reg = <0x00000000 0x00300000>;

0x30d3 /* MX28_PAD_AUART3_TX__GPIO_3_13 */ >;

eeprom: eeprom@51 { compatible = "atmel,24c128";

regulators { compatible = "simple-bus"; reg_3p3v: 3p3v { compatible = "reg

BREAKMODE HARD ;SOFT or HARD, ARM / Thumb break codeSCANSUCC 0 0 ; 1 4 when the ETMBUF after the ARM926 core is en

14.3. Linux14.3.1. Linux crashes randomly◊ 14.3.2. Linux crashes when uncompressing the kernel◊ 14.3.3. Linux Post Mortem Analysis◊ 14.3.4. Linux kern

The trailing '-' character in the CROSS_COMPILE variable value is optional and has no effect onthe cross tools behavior. However, it is req

14. FAQ - Frequently Asked QuestionsThis is a collection of questions which came up repeatedly. Give me more feedback and I will add more stuffhere.Th

# cd <elkd_install_dir># brandelf -t Linux ./install Note: The following workaround might be a good alternative for the tedious copying ofthe in

I try to install the ELDK on a Linux PC, and the installation hangs. It starts fine, but then it freezeslike this:...Preparing... #####

$ df -h /home/wd/.gvfsFilesystem Size Used Avail Use% Mounted ongvfs-fuse-daemon 0 0 0 - /home/wd/.gvfs$ sudo df -h /ho

-#[ "$state" != "rw" -a "$READONLY" != "yes" ] && \-# action $"Remounting root filesystem in rea

14.1.7. ELDK Include Files MissingQuestion:After configuring and compiling a Linux kernel in the kernel source tree that comes with the ELDK, Icannot

SPE, but there are no special FP registers available as on a normal FPU, so General Purpose Registersmust be used for passing of FP operands. While th

.globl foo .type foo, @functionfoo: stwu 1,-48(1) mflr 0 stw 24,16(1) stw 25,20(1) stw 26,24(1)

evmergelo 9,5,6 efdadd 11,0,9 efdmul 0,0,9 efddiv 11,11,0 evstdd 11,24(1) evmergehi 9,11,11 mr 10,11

# dropbearkey -t rsa -f /etc/dropbear/dropbear_rsa_host_keyWill output 1024 bit rsa secret key to '/etc/dropbear/dropbear_rsa_host_key'Gener

/opt/eldk/arm Before the NFS-mounted root file system can work, you must create necessary device nodes in the<ELDK_root>/<target_cpu_variant&

99% or more of all errors are located when you port U-Boot to a new hardware. In the result, yourRAM image may work, but in the end you will need a fu

Alternatively, the tool chain could provide a separate version of libgcc.a built with old ABI. Thiscould be done using the multilib approach. The adva

Why?Answer:Most probably everything is OK. The message is printed because the flash sector or ERPROMcontaining the environment variables has never bee

"add-symbol-file u-boot _offset_" for code after relocation.14.2.8. Decoding U-Boot Crash DumpsWhen you are porting U-Boot to new hardware,

14.2.9. Porting Problem: cannot move locationcounter backwardsQuestion:I'm trying to port U-Boot to a new board and the linker throws an error me

Where can the image size be altered from?Answer:Some processors have a fixed reset vector address at 0xFFFFFFFC, so the U-Boot image has toinclude tha

variables, too.Question:I have configured a MAC address of 01:02:03:04:05:06, and I can see that an ARP packet is sent byU-Boot, and that an ARP reply

14.2.15. Why do I get TFTP timeouts?Question 1:: When trying to download a file from the TFTP server I always get timeouts like these:...Loading: ####

If this doesn't work, fix your TFTP server configuration and make sure it is running.(2) If your TFTP server is working, run ethereal (or equival

the autonegotiation <-> fixed configuration case because the odds of it working properly are poor anyway.Rule:Always try to set up your PHY for

After an ELDK source RPM is installed using the above command, its spec file and sources can be found inthe subdirectories of the <ELDK_root>/us

setenv bootcmd bootm \$address setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname:$netdev:

14.2.17.4. General rulesIf a command line (or an environment variable executed by a run command) contains severalcommands separated by semicolons, and

This installs a lot of kernel modules in "./lib/modules/" and a kernel ELF file in "./boot" :$ ls -l boottotal 8792-rw-r--r-- 1 ro

Question:I am using U-Boot with a Linux kernel version Y (Y < 2.4.5-pre5), but the last message I see isUncompressing Kernel Image ... OKThen the s

Answer:This depends mainly on how you intend to distribute your software updates, and which physicalinterfaces are present (or usable for this purpose

Image Name: Linux-2.4.25Image Type: PowerPC Linux Kernel Image (gzip compressed)Data Size: 1003065 Bytes = 979.6 kBLoad Address: 00000000Entry Point:

14.3.4. Linux kernel register usageFor the Power Architecture® architecture, the Linux kernel uses the following registers:R1:stack pointerR2:pointer

MACHINE_ENDThe machine descriptor macros for your machine will be located in a similar file in your kernel sourcetree. Having located your machine des

Normally, the file "etc/ld.so.cache" contains a compiled list of system libraries. This file isused by the dynamic linker/loader ld.so to ca

We use the SELF ramdisk image that comes with the ELDK. When we try to mount a filesystem overNFS from the server, for example:# mount -t nfs 192.168.

3.9. ELDK Packages3.9.1. List of ELDT PackagesPackage NamePackageVersionautoconf 2.61-8automake 1.10-5bison 2.3-3crosstool-devel 0.43-3dtc 20070802-1e

parse the U-Boot environment directly• pass it via the command line• If your device driver does not support one of these sources directly, then do it

... console=tty0 console=ttyS0,${baudrate} ...This will ensure that the boot messages are displayed on both the framebuffer (/dev/tty0) and the serial

boot. " - Benjamin Herrenschmidt14.3.17. Linux Kernel crashes when using aramdisk imageQuestion:I have a Power Architecture® board with 1 GiB of

CONFIG_BLK_DEV_RAM_SIZE parameter so that it contains a number equal or larger thanyour ramdisk (in kB). (In the 2.4 kernel series, you'll find t

The following kernel configuration options are required to support miscellaneous PCMCIA card typeswith Linux and the PCMCIA CS package:PCMCIA IDE card

For "disk" type PC Cards (FlashDisks, CompactFlash, Hard Disk Adapters - basically anything that looks likean ordinary IDE drive), an altern

systems around.To format your "disk" drive with a MacOS partition table you can use the pdisk command:We start printing the help menu, re-in

First block: 4160Length in blocks: 4096Name of partition: boot1Type of partition: PPCBootCommand (? for help): pPartition map (with 512 byte blocks) o

# mke2fs /dev/hda5mke2fs 1.19, 13-Jul-2000 for EXT2 FS 0.5b, 95/08/09Filesystem label=OS type: LinuxBlock size=4096 (log=2)Fragment size=4096 (log=2)9

Last cylinder or +size or +sizeM or +sizeK (1-1575, default 1575): +2MCommand (m for help): pDisk /dev/hda: 16 heads, 63 sectors, 1575 cylindersUnits

bash 3.2-9bc 1.06-26bind 9.4.1-8.P1binutils 2.17.90-1binutils-devel 2.17.90-1boa 0.94.14-0.5.rc21busybox 1.7.1-2byacc 1.9.20050813-1bzip2 1.0.4-10bzip

The partition table has been altered!Calling ioctl() to re-read partition table. hda: hda1 hda2 hda3 hda4 hda: hda1 hda2 hda3 hda4WARNING: If you have

14.3.25. Use NTP to synchronize system timeagainst RTCIf a system has a real-time clock (RTC) this is often used only to initialize the system time wh

CONFIG_XIP_PHYS_ADDR = FLASH-base-address + offset-in-FLASH CONFIG_XIP_VIRT_ADDR = 0xc0000000 + DRAM-size + offset-in-FLASHThe default configuratio

Be aware that cramfs is a read-only filesystem.14.3.26.3. Hints and NotesXIP conserves RAM at the expense of flash. This might be useful if you have a

I am using a SCC port of a MPC8xx / MPC82xx as UART; for the Linux UART driver I haveconfigured support for hardware handshake. Then I used a null-mod

For building against older versions of the MTD headers (meaning before v2.6.8-rc1) it is required to pass theargument "MTD_VERSION=old" to m

# rm -f random # ln -s urandom randomSolution:The correct solution for the problem is of course to feed sufficient entropy into /dev/random. Todo

bash-2.05b# free total used free shared buffers cachedMem: 14556 14260 296 0 77

14.3.33. Telnet / SSH (dropbear) server not workingQuestion:The telnet server is running on the target but when I try to login I get this error messag

Extract compressed ramdisk image (ramdisk.gz)bash$ dd if=uRamdisk bs=64 skip=1 of=ramdisk.gz21876+1 records in21876+1 records out1. Uncompress ramdisk

5.4. Installation5.4.1. Before You Begin5.4.1.1. Installation Requirements⋅ 5.4.1.2. Board Identification Data⋅ ◊ 5.4.2. Installation Using a BDM/JTAG

dropbear 0.50-1dtc 20070802-1duma 2.5.8-2e2fsprogs 1.39-11e2fsprogs-devel 1.39-11e2fsprogs-libs 1.39-11ethtool 5-1expat 1.95.8-9expat-devel 1.95.8-9fi

Uncompress ramdisk imagebash$ gunzip -v ramdisk.gzramdisk.gz: 66.6% -- replaced with ramdisk2. Mount ramdisk imageAs root:bash# mkdir -p /mnt/tmp

When I try to compile my LInux kernel after applying the RTAI patch, I get a strange "asm-specifierfor variable `__sc_3' conflicts with asm

Conclusion:You cannot debug Linux exception entry and exit code. Because of speed, DataStoreTLBMiss doesnot even make use of EXCEPTION_PROLOG, and SRR

14.6.5. Remote 'g' packet reply is too longQuestion:I'm trying to debug U-Boot for a PPC4xx processor, but I get the following error:(g

14.7.1. LITE5200 Installation HowtoA nice "Application Note: Installing Embedded Linux on the Motorola MPC5200 Lite Evaluation Board"which c

BDM- Background Debug ModeAn on-chip debug interface supported by a special hardware port on some processors. It allows to take fullcontrol over the C

DHCP- Dynamic Host Configuration ProtocolA network protocol which can be used to inquire a server about information for the intended systemconfigurati

GPL/ LGPL - GNU General Public License/Lesser General Public LicenseThe full license text can be found at http://www.gnu.org/copyleft/gpl.html.The lic

MII- Media Independent InterfaceThe IEEE Ethernet standard control interface used to communicate between the Ethernet controller (MAC)and the external

RTOS- Real-Time Operating SystemSCC- Serial Communications ControllerThe high performance module(s) within the CPM which implement the lowest layer of

initscripts 8.54.1-1iproute 2.6.20-2iptables 1.3.8-2iputils 20070202-3iscsitarget 0.4.15-1kbd 1.12-22kernel-headers 2.6.24-1kernel-source 2.6.24-1krb5

Motorola S-records are an industry-standard format for transmitting binary files to target systems and PROMprogrammers.See also: http://pmon.groupbsd.

ltp 20080131-eldk2lvm2 2.02.24-1m4 1.4.8-2mailcap 2.1.23-1make 3.81-6MAKEDEV 3.23-1.2man 1.6e-3mdadm 2.6.2-4microwindows 0.91-2microwindows-fonts 0.91

passwd 0.74-3patch 2.5.4-29.2.2pciutils 2.2.4-3_2pciutils-devel 2.2.4-3_2pcmciautils 014-9_2pcre 7.0-2pcsc-lite 1.3.3-1.0pcsc-lite-devel 1.3.3-1.0pcsc

setup 2.6.4-1_2shadow-utils 4.0.18.1-15slang 2.0.7-17slang-devel 2.0.7-17smartmontools 5.38-2strace 4.5.15-1sysfsutils 2.1.0-1sysklogd 1.4.2-9sysvinit

xenomai 2.4.2-1xinetd 2.3.14-12zip 2.31-3zlib 1.2.3-10zlib-devel 1.2.3-10 Note 1: Not all packages will be installed automatically; for example the bo

SRPMS Fedora 7 sourcesThen you may switch to a specific release of the ELDK using the "git-checkout" command; for example, toget the files f

<some_directory>/ build/cross_rpms/<package_name>/SPECS/... SOURCES/...

3.10.2. Setting Up ELDK Build EnvironmentFor your convenience, the ELDK build environment CD-ROM provides full ELDK build environment. Allyou need to

files (see below for details). You may specify which sub-steps of the build step are to be performed.The formal syntax for the usage of build.sh is as

5.9.7.3. fdt print - recursive print⋅ 5.9.7.4. fdt mknode - create new nodes⋅ 5.9.7.5. fdt set - set node properties⋅ 5.9.7.6. fdt rm - remove nodes o

3.10.4. Format of the cpkgs.lst and tpkgs.lst FilesEach line of these files has the following format:<sub_step_number> <package_name> <

4.2. Configuring the "cu" commandThe cu command is part of the UUCP package and can be used to act as a dial-in terminal. It can also dosimp

~/.kermrc:• set line /dev/ttyS0set speed 115200set carrier-watch offset handshake noneset flow-control nonerobustset file type binset file name litset

4.6. Configuration of a TFTP ServerThe fastest way to use U-Boot to load a Linux kernel or an application image is file transfer over Ethernet. Forthi

option domain-name-servers ns.local.net; host trgt { hardware ethernet 00:30:BF:01:02:D0; fixed-addres

5.4.2. Installation Using a BDM/JTAG Debugger◊ 5.4.3. Installation using U-Boot◊ 5.5. Tool Installation♦ 5.6. Initialization♦ 5.7. Initial Steps♦ 5.8.

5.9.7.7. fdt move - move FDT blob to new address⋅ 5.9.7.8. fdt chosen - fixup dynamic info⋅ 5.9.8. Special Commands5.9.8.1. i2c - I2C sub-system⋅ ◊ 5.

5.2. Unpacking the Source CodeIf you use GIT to get a copy of the U-Boot sources, here an example how you get the sources with git:Note: Included topi

5.4. Installation5.4.1. Before You Begin5.4.1.1. Installation RequirementsThe following section assumes that flash memory is used as the storage devic

update=echo done=> setenv u-boot /tftpboot/duts/m28/u-boot.bin=> run load updateif mmc rescan ; then if tftp ${update_sd_firmware_filename} ; th

9.1.5.3.1. Determining the Parameters of the used Flash Types:• 9.1.5.3.2. Create some Test File System Hierarchy• 9.1.5.3.3. Installing UBIFS images

The default configuration of the console port on the m28 board uses a baudrate of 115200/8N1 (115200 bps, 8Bit per character, no parity, 1 stop bit, n

- print values of all environment variablesprintenv name ... - print value of environment variable 'name'tftpboot - boot image via ne

=> printenv serial# ethaddrserial#=DUTSethaddr=C0:E5:4E:02:00:00=>Please double check that the printed values are correct! You will not be able

-> size = 0x10000000ethaddr = C0:E5:4E:02:00:00ip_addr = 192.168.20.33baudrate = 115200 bpsTLB addr = 0x4FFF0000relocaddr = 0x4

iminfo (short: imi) is used to print the header information for images like Linux kernels or ramdisks. Itprints (among other information) the image na

=>You can use the base command (short: ba) to print or set a "base address" that is used as address offset forall memory commands; the de

43000010: 00800040 00800040 9de1110f 00020205 @[email protected]: 756e694c 2e332d78 2d302e36 7478656e Linux-3.6.0-next=>Like most memor

42000020: 756e694c 2e332d78 2d302e36 7478656e Linux-3.6.0-next=>42000030: 3130322d 30303132 30302d31 2d343130 -20121001-00014-42000040: e1a00

42000010: 00800040 00800040 9de1110f 00020205 @[email protected]: 756e694c 2e332d78 2d302e36 7478656e Linux-3.6.0-next42000030: 3130322d 3

42000010: ffffffea ffffffe9 ffffffe8 ffffffe7 ...42000020: ffffffe6 ffffffe5 ffffffe4 ffffffe3 ...42000030: ffffffe2 f

13.1. Flat Device Tree♦ 13.2. BDI2000 Configuration file♦ 14. FAQ - Frequently Asked Questions14.1. ELDK14.1.1. ELDK Installation under FreeBSD◊ 14.1.

5.9.2.10. loop - infinite loop on address range=> help looploop - infinite loop on address rangeUsage:loop [.b, .w, .l] address number_of_objects=&

5.9.3.3. erase - erase FLASH memoryNote: Included topic DULGData_m28.UBootEraseHelp does not exist yetThe erase command (short: era) is used to erase

The protect command is another complex one. It is used to set certain parts of the flash memory toread-only mode or to make them writable again. Flash

this command uses three environment variables:'partition' - keeps current partition identifierpartition := <part-id><part-id>

=> mtdpartsdevice nand0 <gpmi-nand>, # parts = 3 #: name size offset mask_flags 0: bootloader 0x0

device nand0 <gpmi-nand>, # parts = 5 #: name size offset mask_flags 0: bootloader 0x00300000 0

UBI: available PEBs: 1961UBI: total number of reserved PEBs: 23UBI: number of PEBs reserved for bad PEB handling: 19UBI: max/mean erase co

42000020: 00000800 0001f000 0000000e 000007c0 ...42000030: 00800000 00000000 00000005 00000002 ...42000040: 00000001 0

UBI: number of internal volumes: 1UBI: number of user volumes: 1UBI: available PEBs: 0UBI: total number of reserved PEBs: 1984UBI: num

With the source command you can run "shell" scripts under U-Boot: You create a U-Boot script image bysimply writing the commands you want to

14.3.12. Loopback interface does not work◊ 14.3.13. Linux kernel messages are not printed on the console◊ 14.3.14. Linux ignores input when using the

5.9.4.2. bootm - boot application image from memory=> help bootmbootm - boot application image from memoryUsage:bootm [addr [arg ...]] - boot ap

5.9.4.3. go - start application at address 'addr'=> help gogo - start application at address 'addr'Usage:go addr [arg ...] -

=> loadb 100000## Ready for binary (kermit) download ...Ctrl-\c(Back at denx.denx.de)----------------------------------------------------C-Kermit 7

- print values of all environment variablesprintenv name ... - print value of environment variable 'name'=>The printenv command pr

net_nfs=run fdt_netload kernel_netload nfsargs addip addcons addmtd addmisc;bootm ${kernel_addr_r} - ${fdt_addr_r}net_nfs_nodt=run kernel_netload nfsa

To modify the U-Boot environment you have to use the setenv command. When called with exactly oneargument, it will delete any variable of that name fr

run var [...] - run the commands in the environment variable(s) 'var'=>You can use U-Boot environment variables to store commands and

fdt addr <addr> [<length>] - Set the fdt location to <addr>fdt move <fdt> <newaddr> <length> - Copy the

=> fdt print /cpuscpus { cpu@0 { compatible = "arm,arm926ejs"; };};=>5.9.7.4. fdt mknode - create new nod

testnode {};=>5.9.7.5. fdt set - set node propertiesNow, let's create a property at the newly created node; again we'll use fdt list for

2. Introduction2.1. Copyright♦ 2.2. Disclaimer♦ 2.3. Availability♦ 2.4. Credits♦ 2.5. Translations♦ 2.6. Feedback♦ 2.7. Conventions♦ • 2. Introduction

interrupt-parent = <0x1>; model = "DENX M28EVK"; compatible = "denx,m28evk", "fsl,imx28";

regulators { }; sound { };};=>5.9.7.8. fdt chosen - fixup dynamic infoOne of the modifications made by U-Boot to the b

=> fdt list /chosenchosen {};=>Note: fdt boardsetup performs board-specific blob updates, most commonly setting clock frequencies,etc. Discoveri

MXS MMC: 0=>With the mmc rescan command you can rescan the actual mmc device.=> mmc rescan=>The mmcinfo command displays the information abou

=> md 0x4300000043000000: 00000000 00000000 00000000 00000000 ...43000010: 00000000 00000000 00000000 00000000 ...4

MMC write: dev # 0, block # 583, count 16 ... 16 blocks write: OK=> mmc read 0x42000000 247 10MMC read: dev # 0, block # 583, count 16 ... 16 block

420000c0: 00000000 00000000 00000000 00000000 ...420000d0: 00000000 00000000 00000000 00000000 ...420000e0: 00000000 0

NAND erase: device 0 offset 0x400000, size 0x10000Erasing at 0x400000 -- 100% complete.OK=>5.9.9.2.3. nand write - write to NAND deviceLet's c

5.9.10.2. echo - echo args to console=> help echoecho - echo args to consoleUsage:echo [args..] - echo args to console; \c suppresses newline=&g

5.9.10.5. version - print monitor version=> help versionversion - print monitor, compiler and linker versionUsage:version=>You can print the ver

Send your derivative work (in the most suitable format such as sgml) to the author.• License the derivative work with this same license or use GPL. In

bootdelay: After reset, U-Boot will wait this number of seconds before it executes the contents ofthe bootcmd variable. During this time a countdown i

U-Boot. Define this variable to hold the number of kB you want to reserve for pRAM. Note that theboard info structure will still show the full amount

echo ===== Linux Kernel settings =====setenv bootfile /tftpboot/TQM860L/uImagesetenv kernel_addr 40040000setenv load_kernel 'tftp ${loadaddr} ${b

=> Hint: maximum flexibility can be achieved if you are using the Hush shell as command interpreter inU-Boot; see section 14.2.17. How the Command

## Application terminated, rc = 0x05.12.2. Timer Demo This example is only available on MPC8xx CPUs. 5.13. U-Boot Image FormatsU-Boot operates on &quo

This variable will be automatically created if it does not exist, and it will be updated at each reset ofthe processor. After a power-on reset, it wil

The following command selects a standard configuration for the m28 board that has been extensively tested. Itis recommended to use this as a starting

7.5.1. Bootlog of tftp'd Linux kernel with Root Filesystem over NFS◊ 7.6. Boot from NAND Flash Memory♦ 7.7. Standalone Operation with Ramdisk Ima

device tree source file structure, etc.).7.3. Passing Kernel ArgumentsIn nearly all cases, you will want to pass additional information to the Linux k

The advantage of this mechanism is that you don't have to spend precious system memory (RAM and flash)for network configuration tools like ifconf

Directory Names directoryCommands to be typed a commandApplications NamesanotherapplicationPrompt of users command under bash shell bash$Prompt of roo

sections about the respective U-Boot commands. 7.5. Networked Operation with Root Filesystemover NFSThis section will show how to boot the target into

Image Name: Linux-3.6.0-next-20121001-00014- Created: 2012-10-02 13:23:40 UTC Image Type: ARM Linux Kernel Image (uncompressed) Dat

[ 0.230000] usbcore: registered new interface driver usbfs[ 0.240000] usbcore: registered new interface driver hub[ 0.240000] usbcore: regist

[ 1.350000] hub 2-0:1.0: 1 port detected[ 1.350000] mousedev: PS/2 mouse device common for all mice[ 1.360000] stmp3xxx-rtc 80056000.rtc: rtc

Starting Distributed Compiler Daemon: distcc.creating NFS state directory: donestarting 8 nfsd kernel threads: rpc.nfsd: Unable to access /proc/fs/nfs

Load Address: 40008000 Entry Point: 40008000 Verifying Checksum ... OK=> nand write ${kernel_addr_r} ${nand_off} ${filesize}NAND write: dev

stdout=serialstderr=serialbootcmd=bootm 42000000 - 41000000 bootargs=root=/dev/nfs rw nfsroot=192.168.1.1:/opt/eldk-5.2/armv5te/rootfsip=192.168.20.38

9.2. The TMPFS Virtual Memory Filesystem9.2.1. Mount Parameters◊ 9.2.2. Kernel Support for tmpfs◊ 9.2.3. Usage of tmpfs in Embedded Systems◊ ♦ 9.3. Us

Now we can run some basic tests to verify that the flash driver routines and the partitioning works asexpected:root@generic-armv5te:~#root@generic-arm

If the flash device is erased, we can simply mount it, and the creation of the JFFS filesystem is performedautomagically. Note: For simple accesses li