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IXP2000

IXP2000 2.3 KB
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  2. -------------------------------------------------------------------------
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  3. Release Notes for Linux on Intel's IXP2000 Network Processor
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  4. 

  5. Maintained by Deepak Saxena <dsaxena@plexity.net>
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  6. -------------------------------------------------------------------------
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  7. 

  8. 1. Overview
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  9. 

  10. Intel's IXP2000 family of NPUs (IXP2400, IXP2800, IXP2850) is designed
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  11. for high-performance network applications such high-availability
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  12. telecom systems. In addition to an XScale core, it contains up to 8
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  13. "MicroEngines" that run special code, several high-end networking 
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  14. interfaces (UTOPIA, SPI, etc), a PCI host bridge, one serial port,
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  15. flash interface, and some other odds and ends. For more information, see:
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  16. 

  17. http://developer.intel.com
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  18. 

  19. 2. Linux Support
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  20. 

  21. Linux currently supports the following features on the IXP2000 NPUs:
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  22. 

  23. - On-chip serial
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  24. - PCI
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  25. - Flash (MTD/JFFS2)
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  26. - I2C through GPIO
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  27. - Timers (watchdog, OS)
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  28. 

  29. That is about all we can support under Linux ATM b/c the core networking
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  30. components of the chip are accessed via Intel's closed source SDK. 
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  31. Please contact Intel directly on issues with using those. There is
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  32. also a mailing list run by some folks at Princeton University that might
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  33. be of help:  https://lists.cs.princeton.edu/mailman/listinfo/ixp2xxx
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  34. 

  35. WHATEVER YOU DO, DO NOT POST EMAIL TO THE LINUX-ARM OR LINUX-ARM-KERNEL
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  36. MAILING LISTS REGARDING THE INTEL SDK.
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  37. 

  38. 3. Supported Platforms
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  39. 

  40. - Intel IXDP2400 Reference Platform
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  41. - Intel IXDP2800 Reference Platform
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  42. - Intel IXDP2401 Reference Platform
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  43. - Intel IXDP2801 Reference Platform
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  44. - RadiSys ENP-2611
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  45. 

  46. 4. Usage Notes
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  47. 

  48. - The IXP2000 platforms usually have rather complex PCI bus topologies
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  49.   with large memory space requirements. In addition, b/c of the way the
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  50.   Intel SDK is designed, devices are enumerated in a very specific
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  51.   way. B/c of this this, we use "pci=firmware" option in the kernel
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  52.   command line so that we do not re-enumerate the bus.
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  53. 

  54. - IXDP2x01 systems have variable clock tick rates that we cannot determine 
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  55.   via HW registers. The "ixdp2x01_clk=XXX" cmd line options allow you
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  56.   to pass the clock rate to the board port.
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  57. 

  58. 5. Thanks
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  59. 

  60. The IXP2000 work has been funded by Intel Corp. and MontaVista Software, Inc.
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  61. 

  62. The following people have contributed patches/comments/etc:
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  63. 

  64. Naeem F. Afzal
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  65. Lennert Buytenhek
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  66. Jeffrey Daly
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  67. 

  68. -------------------------------------------------------------------------
    69. 

  69. Last Update: 8/09/2004
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  70.