Designing Embedded Network Applications Essential Insights by Gerard Hartnett, Peter Barry

By Gerard Hartnett, Peter Barry

E-book by means of Gerard Hartnett, Peter Barry

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Includes companion files which can be downloaded by clicking on the links found at the bottom of the launch page for programs. Title is in personal folders Contains a bookmark which can be found by clicking the link on the Table of Contents page. Corporate Annotations Includes supplemental CD content which can be 46 Chapter 2: Intel IXP4XX Network Processor Architecture Chapter 2: Intel IXP4XX Network Processor Architecture 47 downloaded by clicking the link found on the Table of Contents page Offers a full text Adobe PDF which can be retrieved by clicking the download tool.

Some ARM processor core-based devices allow you to map the location of the exception table when the chip comes out of reset. In this case, the startup code must be located at the physical address 0xFFFF0000. You can configure the Intel XScale core to raise a data abort for unaligned memory access. Unaligned accesses occur when a 32-bit access is performed on an address that is not a multiple of four or when a 16-bit access is performed on addresses that are not a multiple of two. Some operating systems provide an unaligned data abort handler.

For time-to-market, you can then develop an application that runs on the Intel XScale core using standard tool chains, the C programming language, and an RTOS such as Linux†, VxWorks†, and Windows† CE. These RTOSs usually contain higher-level functionality ranging from Internet protocol (IP) networking stacks to firewall features to HTTP servers. In addition, many third-party companies provide applications, such as VoIP gateways, enterprise wireless access points, and network-addressed storage applications (NAS) that have already been integrated and optimized to take advantage of the IXP4XX network processor silicon and software architecture.

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