mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 10:01:43 +00:00
70 lines
2.4 KiB
Plaintext
70 lines
2.4 KiB
Plaintext
|
|
||
|
|
-------------------------------------------------------------------------
|
||
|
|
Release Notes for Linux on Intel's IXP2000 Network Processor
|
||
|
|
|
||
|
|
Maintained by Deepak Saxena <dsaxena@plexity.net>
|
||
|
|
-------------------------------------------------------------------------
|
||
|
|
|
||
|
|
1. Overview
|
||
|
|
|
||
|
|
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:
|
||
|
|
|
||
|
|
http://developer.intel.com/design/network/products/npfamily/ixp2xxx.htm
|
||
|
|
|
||
|
|
2. Linux Support
|
||
|
|
|
||
|
|
Linux currently supports the following features on the IXP2000 NPUs:
|
||
|
|
|
||
|
|
- On-chip serial
|
||
|
|
- PCI
|
||
|
|
- Flash (MTD/JFFS2)
|
||
|
|
- I2C through GPIO
|
||
|
|
- Timers (watchdog, OS)
|
||
|
|
|
||
|
|
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
|
||
|
|
|
||
|
|
WHATEVER YOU DO, DO NOT POST EMAIL TO THE LINUX-ARM OR LINUX-ARM-KERNEL
|
||
|
|
MAILING LISTS REGARDING THE INTEL SDK.
|
||
|
|
|
||
|
|
3. Supported Platforms
|
||
|
|
|
||
|
|
- Intel IXDP2400 Reference Platform
|
||
|
|
- Intel IXDP2800 Reference Platform
|
||
|
|
- Intel IXDP2401 Reference Platform
|
||
|
|
- Intel IXDP2801 Reference Platform
|
||
|
|
- RadiSys ENP-2611
|
||
|
|
|
||
|
|
4. Usage Notes
|
||
|
|
|
||
|
|
- 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.
|
||
|
|
|
||
|
|
- 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.
|
||
|
|
|
||
|
|
5. Thanks
|
||
|
|
|
||
|
|
The IXP2000 work has been funded by Intel Corp. and MontaVista Software, Inc.
|
||
|
|
|
||
|
|
The following people have contributed patches/comments/etc:
|
||
|
|
|
||
|
|
Naeem F. Afzal
|
||
|
|
Lennert Buytenhek
|
||
|
|
Jeffrey Daly
|
||
|
|
|
||
|
|
-------------------------------------------------------------------------
|
||
|
|
Last Update: 8/09/2004
|