Книга: Embedded Linux Primer: A Practical, Real-World Approach

3.2.11. Intel ARM XScale

3.2.11. Intel ARM XScale

Intel manufactures and markets several integrated processors based on the ARM v5TE architecture. Intel uses the XScale name for the architecture. These products are grouped into several application categories. Table 3-10 summarizes the XScale families by application type.

Table 3-10. Intel XScale Processor Summary

Category Application Example Processors
Application processors Cellular handsets and PDAs PXA27x, PXA29x
I/O processors High-speed data processing used in storage, printing, telematics, and so on IOP331/332/333
Network processors Networking and communications data plane processing, fast packet processing, and so on IXP425, IXP465 IXP2350, IXP2855

Many consumer and networking products have been developed using Intel XScale architecture processors. Some well-known examples include the GPS iQue M5 from Garmin, the iPAQ by Hewlett-Packard, smart phones from Palm (Treo) and Motorola (A760), and many others. Linux currently supports all these processors.

Intel's network processors are found in high-performance networking equipment where requirements exist for fast data-path processing. Examples include deep packet inspection, data encryption/decryption, packet filtering, and signal processing. These network processors each contain an ARM core coupled with one or more dedicated processing engines, called a network processing engine (NPE). These NPEs are dedicated to specific data-path manipulation in real time at wire speeds. The NPE is a microprocessor, in the sense that it can execute microcoded algorithms in parallel with the thread of execution in the ARM core. Refer to the Intel website, at www.intel.com, for additional information on this powerful family of integrated processors.

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