Difference between revisions of "Loongson"

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(Loongson 2F)
(Slightly cleanup wiki markup; no content changes.)
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'''Microarchitecture:'''  
 
'''Microarchitecture:'''  
  
- 64 bit
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* 64 bit
 
+
* 9 pipeline stages
- 9 pipeline stages
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* 4-issue Out-Of-Order Executive
 
+
* 2 ALU, 2 FALU, 1 SIMD, 1 Load/Store Units
- 4-issue Out-Of-Order Executive
+
 
+
- 2 ALU, 2 FALU, 1 SIMD, 1 Load/Store Units
+
  
 
'''ISA:''' MIPSIII
 
'''ISA:''' MIPSIII
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Some new SIMD instructions: simmilar to MMX, using FPU for parallel fix-point arithmetic.
 
Some new SIMD instructions: simmilar to MMX, using FPU for parallel fix-point arithmetic.
  
An Executive bit: help OS to protect from buffer-flow attack.
+
An Execution bit: help OS to protect from buffer-flow attack.
  
 
+
=== Devices based on this CPU ===
----
+
 
+
* http://www.st.com/stonline/products/literature/bd/13367.htm
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* http://www.loongson.cn/
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* http://en.wikipedia.org/w/index.php?title=Godson
+
* [http://blog.360.yahoo.com/blog-t7XKGI8kebP22pOrg03O8w--?cq=1 My CPU is Loongson(Godson)!!!] blog
+
* http://www.cyrius.com/journal/2007/03/08
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* http://linuxdevices.com/news/NS5724036154.html
+
 
+
===Devices based on this CPU ===
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* [[Fulong]]
 
* [[Fulong]]
  
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* http://www.lemote.com/upfiles/godson2e-user-manual-V0.6.pdf
 
* http://www.lemote.com/upfiles/godson2e-user-manual-V0.6.pdf
  
==Loongson 2F==
+
== Loongson 2F ==
 
Loongson 2F is the latest processor in Loongson 2 Family. Also manufactured by STMicroelectronics.
 
Loongson 2F is the latest processor in Loongson 2 Family. Also manufactured by STMicroelectronics.
  
No improvements compared with 2E except following points:
+
It is identical to the Loongson 2E with several improvments:
  
*Higher Clock Frequence: 1.2GHz maximum
+
* Higher Clock Frequence: 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
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* Intergrated DDR2 controller
*Intergrated northbridge:Faster IO (compared with former PCI bus) with PCI-X 66 bus
+
* Intergrated northbridge providing faster IO (compared with former PCI bus) with PCI-X 66 bus
*Smaller Packaging.
+
* Smaller Packaging.
  
 
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=== Devices based on this CPU ===
===Devices based on this CPU ===
+
 
* [[Fulong2f]]
 
* [[Fulong2f]]
  
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English version
 
English version
 
* [http://www.loongsondeveloper.com/doc/Loongson2FUserGuide.pdf http://www.loongsondeveloper.com/doc/Loongson2FUserGuide.pdf]
 
* [http://www.loongsondeveloper.com/doc/Loongson2FUserGuide.pdf http://www.loongsondeveloper.com/doc/Loongson2FUserGuide.pdf]
 +
 +
== See also ==
 +
* http://www.st.com/stonline/products/literature/bd/13367.htm
 +
* http://www.loongson.cn/
 +
* http://en.wikipedia.org/w/index.php?title=Godson
 +
* [http://blog.360.yahoo.com/blog-t7XKGI8kebP22pOrg03O8w--?cq=1 My CPU is Loongson(Godson)!!!] blog
 +
* http://www.cyrius.com/journal/2007/03/08
 +
* http://linuxdevices.com/news/NS5724036154.html

Revision as of 09:35, 15 June 2009

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 Frequence: 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 Frequence: 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

See also