Embedded Linux, 1st Edition by John Lombardo

By John Lombardo

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Additional resources for Embedded Linux, 1st Edition

Example text

The alternative to using an industrial product, which ostensibly offers great long-term availability and reliability, is to settle for the "motherboard du jour" approach. Under this system, you use whatever boards are available; although these boards may indeed be PC-compatible (by definition), some will also be completely different in terms of component layout, heat distribution, core chipsets, BIOS features, power requirements, memory compatibility, processor vendors, peripheral functions, mechanical mounting, and cabling/connector requirements.

What's more, some manufacturers are willing to simplify the design process by supplying a wealth of reference materials, evaluation systems, and even complete ready-to-use designs in CAD format. All you have to do is ask—but be prepared to "do the math" anyway, since you still have to contend with PCB layouts, mechanical and thermal issues, assembly and test, EMI and safety, and a wide range of other issues that apply to any product—whether PC-compatible or not. If it sounds as though I'm discouraging the use of PCs for embedded Linux, rest assured that I'm not.

Lds) is shown in the following listing. Notice the line that reads. = PAGE_OFFSET_RAW + 0x100000;. text section should start at location PAGE_OFFSET_RAW + 0x100000. This matches with the 0x100000 from the ljmp instruction at the end of linuxbiosmain(). S file within the kernel in a minute. /* ld script to make i386 Linux kernel * Written by Martin Mares */ OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386") OUTPUT_ARCH(i386) ENTRY(_start) SECTIONS { . S. The following listing is adapted from the i386 architecture tree.

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