Difference between revisions of "Loongson"
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*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 | ||
| − | *Intergrated northbridge：Faster IO | + | *Intergrated northbridge：Faster IO (compared with former PCI bus) with PCI-X 66 bus |
*Smaller Packaging. | *Smaller Packaging. | ||
Revision as of 12:05, 24 October 2007
Contents |
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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 Executive bit: help OS to protect from buffer-flow attack.
- http://www.st.com/stonline/products/literature/bd/13367.htm
- http://www.loongson.cn/
- http://en.wikipedia.org/w/index.php?title=Godson
- My CPU is Loongson(Godson)!!! blog
- http://www.cyrius.com/journal/2007/03/08
- http://linuxdevices.com/news/NS5724036154.html
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.
No improvements compared to 2E except following points:
- 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：Faster IO (compared with former PCI bus) with PCI-X 66 bus
- Smaller Packaging.
