forked from Minki/linux
70 lines
2.4 KiB
Plaintext
70 lines
2.4 KiB
Plaintext
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-------------------------------------------------------------------------
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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
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for high-performance network applications such high-availability
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telecom systems. In addition to an XScale core, it contains up to 8
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"MicroEngines" that run special code, several high-end networking
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interfaces (UTOPIA, SPI, etc), a PCI host bridge, one serial port,
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flash interface, and some other odds and ends. For more information, see:
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http://developer.intel.com/design/network/products/npfamily/ixp2xxx.htm
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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
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- PCI
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- Flash (MTD/JFFS2)
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- I2C through GPIO
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- Timers (watchdog, OS)
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That is about all we can support under Linux ATM b/c the core networking
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components of the chip are accessed via Intel's closed source SDK.
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Please contact Intel directly on issues with using those. There is
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also a mailing list run by some folks at Princeton University that might
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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
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MAILING LISTS REGARDING THE INTEL SDK.
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3. Supported Platforms
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- Intel IXDP2400 Reference Platform
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- Intel IXDP2800 Reference Platform
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- Intel IXDP2401 Reference Platform
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- Intel IXDP2801 Reference Platform
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- RadiSys ENP-2611
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4. Usage Notes
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- The IXP2000 platforms usually have rather complex PCI bus topologies
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with large memory space requirements. In addition, b/c of the way the
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Intel SDK is designed, devices are enumerated in a very specific
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way. B/c of this this, we use "pci=firmware" option in the kernel
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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
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via HW registers. The "ixdp2x01_clk=XXX" cmd line options allow you
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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
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Lennert Buytenhek
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Jeffrey Daly
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-------------------------------------------------------------------------
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Last Update: 8/09/2004
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