Difference between revisions of "Loongson"

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(Loongson 2F: Added Optimizing GNU/Linux distributions for loongson2f section)
(Optimizing GNU/Linux distributions for loongson2f: Add link to lemote's linux on loongson community page, which has a ton of info)
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English version
 
English version
 
* [http://dev.lemote.com/files/resource/documents/Loongson/ls2f/Loongson2FUserGuide.pdf http://dev.lemote.com/files/resource/documents/Loongson/ls2f/Loongson2FUserGuide.pdf]
 
* [http://dev.lemote.com/files/resource/documents/Loongson/ls2f/Loongson2FUserGuide.pdf http://dev.lemote.com/files/resource/documents/Loongson/ls2f/Loongson2FUserGuide.pdf]
 
=== Optimizing GNU/Linux distributions for loongson2f ===
 
Loongson2f software works considerably faster if compiled with the correct flags. Also some flags are required to work around processor bugs early in the production runs.
 
* [http://groups.google.com/group/loongson-dev/browse_thread/thread/b5a981eb8b0d5f95/44000411e1eb7f4e#44000411e1eb7f4e Current loongson2f linux version / compiler / version flags wisdom?]
 
* [http://groups.google.com/group/loongson-dev/browse_thread/thread/08ee750be0a407a9 Taking full advantage of MIPSEL / loongson2f CPU]
 
  
 
== Contributing ==
 
== Contributing ==

Revision as of 04:20, 4 July 2010

This article is a stub. You can help by expanding it

Loongson 2E

Loongson 2E was designed by ICT (Institute of Computing Technology), a department of The Chinese Academy of Sciences, helped and manufactured by STMicroelectronics.

ST Generic Part Number: STLS2E02

Features

Microarchitecture:

  • 64 bit
  • 9 pipeline stages
  • 4-issue Out-Of-Order Executive
  • 2 ALU, 2 FALU, 1 SIMD, 1 Load/Store Units

ISA: MIPSIII

Cache: 64KB L1 date, 64KB L1 instruction, on-chip 512KB L2.

Clock Frequency: 600MHz - 800MHz.

TDP: 4 Watt at 700MHz

Integrated: DDR-333 memory controller.


Highlights

ST's Leading Edge 90nm process.

Some new instructions: Allow write to register directly without MFLO or MFHI.

Some new instructions: MADD.[S|D] MSUB.[S|D] NMADD.[S|D] NMSUB.[S|D].

Some new SIMD instructions: simmilar to MMX, using FPU for parallel fix-point arithmetic.

An Execution bit: help OS to protect from buffer-flow attack.

Devices based on this CPU

Processor documentation

Chinese version

English version

Loongson 2F

Loongson 2F is the latest processor in Loongson 2 Family. Also manufactured by STMicroelectronics.

It is identical to the Loongson 2E with several improvments:

  • Higher Clock Frequency: 1.2GHz maximum
  • Advanced power control technology: less than 6 Watt under 1GHz in the same 90nm
  • Intergrated DDR2 controller
  • Intergrated northbridge providing faster IO (compared with former PCI bus) with PCI-X 66 bus
  • Smaller Packaging.

Devices based on this CPU

Processor documentation

Chinese version

English version

Contributing

See also