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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 |
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