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Godson 2 - Loongson
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Godson 2
godson 2 logo.svg
Godson 2
Developer Institute of Computing Technology of the Chinese Academy of Sciences, Loongson
Manufacturer STMicroelectronics
Type Microprocessors
Introduction 2003 (announced)
2003 (launch)
Architecture 64-bit MIPS processors
ISA MIPS64
µarch GS464
Word size 64 bit
8 octets
16 nibbles
Process 180 nm
0.18 μm
1.8e-4 mm
, 90 nm
0.09 μm
9.0e-5 mm
, 65 nm
0.065 μm
6.5e-5 mm
, 40 nm
0.04 μm
4.0e-5 mm
Technology CMOS
Succession
Godson 1 Godson 3

Godson 2 (龍芯2) is a family of 64-bit MIPS performance desktop processors developed by the Institute of Computing Technology of the Chinese Academy of Sciences (ICT) in 2003. The Godson 2 processors are now developed by Loongson Technology (which was co-founded by ICT) and sold as low-power embedded and desktop processors. The Godson 2 is famous for being the first Chinese developed 64-bit microprocessors.

Overview

Main article: GS464 µarch

The Godson 2 microprocessors are designed as a general purpose 64-bit that implements a MIPS64-like instruction set (Note that at the time ICT was not a MIPS licensee). Many improvements were done in Godson over its predecessor such as a wider pipeline capable of fetching and decoding four times as many instructions per cycle.

Initial Godson 2 models were fabricated on a 6-metal 0.18 µm process CMOS technology using automatic placing and routing. Later models enjoyed a series of process shrinks. The Godson 2 has integrated additional features over the years from just a CPU to an entire SoC incorporating a PCI/PCIX controller, memory controller, SPI/UART. Those processors utilized the a HyperTransport bus for the southbridge. Most recent models integrated much of the southbridge on-die as well including PCIe, SATA, and a USB controller as well as multimedia support (GPU, dual display, audio, and media decoders).

Godson 2 processors can be found in many low end laptops and embedded hardware manufactured by Lemote Technology.

Facts about "Godson 2 - Loongson"
designerInstitute of Computing Technology of the Chinese Academy of Sciences + and Loongson +
first announced2003 +
first launched2003 +
full page nameloongson/godson 2 +
instance ofmicroprocessor family +
instruction set architectureMIPS64 +
main designerInstitute of Computing Technology of the Chinese Academy of Sciences +
manufacturerSTMicroelectronics +
microarchitectureGS464 +
nameGodson 2 +
process180 nm (0.18 μm, 1.8e-4 mm) +, 90 nm (0.09 μm, 9.0e-5 mm) +, 65 nm (0.065 μm, 6.5e-5 mm) + and 40 nm (0.04 μm, 4.0e-5 mm) +
technologyCMOS +
word size64 bit (8 octets, 16 nibbles) +