This is the DENX U-Boot and Linux Guide to Embedded PowerPC, ARM and MIPS Systems. The document describes how to configure, build. This manual is excerpted from the Denx UBOOT manual as . when booting a Linux kernel,’arg’ can be the address of an initrd image. Digi may make improvements and/or changes in this manual or in the product(s) and/or the program(s) Features of U-Boot. DULG/Manual. Features of . This command works only for Linux kernel images.
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A general purpose DMA engine with relatively limited throughput provided by the microcoded CPMfor use with external peripherals or memory-to-memory transfers.
The DENX U-Boot and Linux Guide (DULG) for TQM8xxL (6) @ Welkin小窩 :: 痞客邦 ::
Ethernet does not work in Linux A form a data transfer directly between memory and a peripheral or between memory and memory, without normal program intervention. BDI Configuration file Space requirements and RAM saving, an example Includes binding specific ppc registers to certain fixed purposes, even though there may be no technical reason to enforce such binding, simplifying the process of linking together two separate sets of object code.
It u-booy works best to run ethereal on your TFTP server if you run it on a different machine and you use an ethernet switch, the third machine likely won’t see the tftp packets.
How to Debug Linux Exceptions From then, the system time is running independently. Kernel Support for tmpfs 9. If the poll isn’t happening or has a bug, you have problems like described above. The convention for register usage and C linkage commonly used on desktop PowerPC machines.
How can I implement automatic software updates? Installation on Guidd Harddisk If it is present in your environment, you can delete it as follows:. CVS is a version control system; it can be used to record the history of files, so that it is for instance possible to retrieve specific versions of a source tree. A lower performance version of the SCCs with more limited functionality, particularly useful for serial debug ports and low throughput serial protocols. Supported Host Systems 3.
Mastering Embedded Linux Programming by Chris Simmonds
USB does not work on Lite board The computer system which is used for software development. Kernel Configuration and Compilation 6. Before You Begin 5.
Passing Kernel Arguments 7. Wrong debug symbols after relocation Using the “minicom” program 4.
You may find yourself in a situation where the Linux kernel crashes or hangs without any output on the console. Old, simple command line parser Why is my Ethernet operation not reliable? First we create a filesystem image ext2 will do on the NFS filesystem and mount it with the aid of the loopback device. Here is an example configuration file:. Adding Files to Ramdisk is Non Persistent Debugging with Graphical User Interfaces An on-chip debug interface supported by a special hardware port on some processors.
USB does not work on Lite board U-Boot crashes after relocation to RAM Motorola S-records are an industry-standard format for transmitting binary files to target systems and PROM programmers. JFFS developed by Axis Communicartion AB, Sweden is a log-based filesystem on top of the MTD layer; it promises to keep your filesystem and data in a consistent state even in cases of sudden power-down or system crashes.
Relocation cannot be done when using -mrelocatable A bank of memory flash or RAM consists of all those memory chips on your system that are controlled by the same chip select signal. If you do not already have a reasonable sized disk directory tree you will need to make one.
U-Boot Standalone Applications 5. CFI is a standard for flash chips that allows to create device independend drivers for such chips. My standalone program does not work A highly flexible bus interfacing aand unit allowing external peripherals with an extremely wide variety of interfacing requirements to be connected directly to the CPU.
Loopback interface does not work Using the ELDK on a 64 bit platform Ethernet does not work in Linux Remember that Linux by default supports only ramdisks up to a size of 4 MB. Instead of re-packing into a U-boot ramdisk linus you can of course also just extract the contents of the SELF image and re-use it as base of a known to be working root filesystem.
The backtrace tool can be used for this purpose. Working with ELDK 3. How to Debug Linux Exceptions