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| Release Notes for Linux on Intel's IXP2000 Network Processor |
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| Maintained by Deepak Saxena <dsaxena@plexity.net> |
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| 1. Overview |
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| Intel's IXP2000 family of NPUs (IXP2400, IXP2800, IXP2850) is designed |
| for high-performance network applications such high-availability |
| telecom systems. In addition to an XScale core, it contains up to 8 |
| "MicroEngines" that run special code, several high-end networking |
| interfaces (UTOPIA, SPI, etc), a PCI host bridge, one serial port, |
| flash interface, and some other odds and ends. For more information, see: |
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| http://developer.intel.com |
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| 2. Linux Support |
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| Linux currently supports the following features on the IXP2000 NPUs: |
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| - On-chip serial |
| - PCI |
| - Flash (MTD/JFFS2) |
| - I2C through GPIO |
| - Timers (watchdog, OS) |
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| That is about all we can support under Linux ATM b/c the core networking |
| components of the chip are accessed via Intel's closed source SDK. |
| Please contact Intel directly on issues with using those. There is |
| also a mailing list run by some folks at Princeton University that might |
| be of help: https://lists.cs.princeton.edu/mailman/listinfo/ixp2xxx |
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| WHATEVER YOU DO, DO NOT POST EMAIL TO THE LINUX-ARM OR LINUX-ARM-KERNEL |
| MAILING LISTS REGARDING THE INTEL SDK. |
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| 3. Supported Platforms |
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| - Intel IXDP2400 Reference Platform |
| - Intel IXDP2800 Reference Platform |
| - Intel IXDP2401 Reference Platform |
| - Intel IXDP2801 Reference Platform |
| - RadiSys ENP-2611 |
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| 4. Usage Notes |
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| - The IXP2000 platforms usually have rather complex PCI bus topologies |
| with large memory space requirements. In addition, b/c of the way the |
| Intel SDK is designed, devices are enumerated in a very specific |
| way. B/c of this this, we use "pci=firmware" option in the kernel |
| command line so that we do not re-enumerate the bus. |
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| - IXDP2x01 systems have variable clock tick rates that we cannot determine |
| via HW registers. The "ixdp2x01_clk=XXX" cmd line options allow you |
| to pass the clock rate to the board port. |
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| 5. Thanks |
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| The IXP2000 work has been funded by Intel Corp. and MontaVista Software, Inc. |
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| The following people have contributed patches/comments/etc: |
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| Naeem F. Afzal |
| Lennert Buytenhek |
| Jeffrey Daly |
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| Last Update: 8/09/2004 |