Difference between revisions of "Loongson"

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(Fix link to Loongson 2F User Guide in English)
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'''Cache:''' 64KB L1 date, 64KB L1 instruction, on-chip 512KB L2.
 
'''Cache:''' 64KB L1 date, 64KB L1 instruction, on-chip 512KB L2.
  
'''Clock Frequence:''' 600MHz - 800MHz.
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'''Clock Frequency:''' 600MHz - 800MHz.
  
 
'''TDP:''' 4 Watt at 700MHz
 
'''TDP:''' 4 Watt at 700MHz
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It is identical to the Loongson 2E with several improvments:
 
It is identical to the Loongson 2E with several improvments:
  
* Higher Clock Frequence: 1.2GHz maximum
+
* Higher Clock Frequency: 1.2GHz maximum
 
* Advanced power control technology: less than 6 Watt under 1GHz in the same 90nm
 
* Advanced power control technology: less than 6 Watt under 1GHz in the same 90nm
 
* Intergrated DDR2 controller
 
* Intergrated DDR2 controller

Revision as of 22:45, 9 March 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