From WikiChip
Godson 2 - Loongson
< loongson

Godson 2
godson 2 logo.svg
Godson 2
Developer Institute of Computing Technology of the Chinese Academy of Sciences, Loongson
Manufacturer STMicroelectronics, SMICS
Type Microprocessors
Introduction 2003 (announced)
October 17, 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
, 130 nm
0.13 μm
1.3e-4 mm
, 90 nm
0.09 μm
9.0e-5 mm
, 65 nm
0.065 μm
6.5e-5 mm
Technology CMOS
Clock 250 MHz-1,000 MHz
Succession
Godson 1 Godson 3

Godson 2 (龍芯2) is a family of 64-bit MIPS low-power 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 as well as the first Chinese processors to break the gigahertz frequency.

Overview[edit]

Main article: GS464 µarch

The Godson 2 family of microprocessors started out in 2002 by the Institute of Computing Technology of the Chinese Academy of Sciences (ICT) after the successful design of the first Godson 1. The Godson 2 series is based on a more ambitious goal with high efficiency and high performance in mind. Godson 2 processors are designed as general purpose 64-bit MIPS64-like processors. At the time they were marketed as "MIPS-like" due to not having a proper license from MIPS Technologies. A number of patented instructions were also omitted from the ISA for this reason. In August 2011 Loongson Technology officially licensed the MIPS32 and MIPS64 architectures from MIPS Technologies allowing them to label the chips as "MIPS-compatible".

The first Godson 2, model 2B which was introduced in 2003, became China's first 64-bit microprocessor. This model was fabricated using 6-metal 0.18 µm process using CMOS technology.

The next few successors introduced incrementally better clock speeds (doubling with each model) along with a larger cache and improved branch predictors for triple the performance improvement each time. With the introduction of the 2E, ICT reached 1 GHz clock frequency. This was the first such achievement for an entirely Chinese-based design. Those models were all manufactured on SMICS's 0.18 µm process as well.

In October 2006, Loongson signed a strategic agreement with STMicroelectronics to fabricate the Godson chips. Later models started using ST's 90 nm process followed by 65 nm.

The introduction of the 2E brought about higher integration with the introduction of an on-die northbridge, incorporating a DDR1 memory controller. With the launch of the 2F in 2008, ICT improved their integrated memory controller capabilities and started integrating some components of the southbridge as well (HyperTransport, PCI/PCI-E).

In 2011 Loongson introduced their first complete system-on-chip, the 2H. The chip incorporated both the northbridge, southbridge (integrating things such as PCIe, SATA, and a USB controller), and a licensed low-power Vivante GC800 GPU. The 2H is based on Loongson's GS464V architecture which incorporates the MIPS SIMD extension. The 2G can serve as a standalone SoC powering low-power nettops and tablets or in slave mode, serving as a complete chipset solution to the more power Godson 3 series of processors.

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

Members[edit]

 List of Godson-2 Processors
 ProcessorIGP
ModelLaunchedProcessFrequencyL1$L2$PowerNameFrequency
2A180 nm
0.18 μm
1.8e-4 mm
250 MHz
0.25 GHz
250,000 kHz
64 KiB
0.0625 MiB
65,536 B
6.103516e-5 GiB
3 W
3,000 mW
0.00402 hp
0.003 kW
2B17 October 2003180 nm
0.18 μm
1.8e-4 mm
300 MHz
0.3 GHz
300,000 kHz
64 KiB
0.0625 MiB
65,536 B
6.103516e-5 GiB
3 W
3,000 mW
0.00402 hp
0.003 kW
2B1March 2004180 nm
0.18 μm
1.8e-4 mm
400 MHz
0.4 GHz
400,000 kHz
64 KiB
0.0625 MiB
65,536 B
6.103516e-5 GiB
4 W
4,000 mW
0.00536 hp
0.004 kW
2C28 September 2004180 nm
0.18 μm
1.8e-4 mm
500 MHz
0.5 GHz
500,000 kHz
128 KiB
0.125 MiB
131,072 B
1.220703e-4 GiB
5 W
5,000 mW
0.00671 hp
0.005 kW
2D2006130 nm
0.13 μm
1.3e-4 mm
700 MHz
0.7 GHz
700,000 kHz
128 KiB
0.125 MiB
131,072 B
1.220703e-4 GiB
5 W
5,000 mW
0.00671 hp
0.005 kW
2D12006130 nm
0.13 μm
1.3e-4 mm
800 MHz
0.8 GHz
800,000 kHz
128 KiB
0.125 MiB
131,072 B
1.220703e-4 GiB
6 W
6,000 mW
0.00805 hp
0.006 kW
2E18 March 200690 nm
0.09 μm
9.0e-5 mm
1,000 MHz
1 GHz
1,000,000 kHz
128 KiB
0.125 MiB
131,072 B
1.220703e-4 GiB
512 KiB
0.5 MiB
524,288 B
4.882812e-4 GiB
7 W
7,000 mW
0.00939 hp
0.007 kW
2FJune 200890 nm
0.09 μm
9.0e-5 mm
800 MHz
0.8 GHz
800,000 kHz
128 KiB
0.125 MiB
131,072 B
1.220703e-4 GiB
512 KiB
0.5 MiB
524,288 B
4.882812e-4 GiB
5 W
5,000 mW
0.00671 hp
0.005 kW
2GNovember 201065 nm
0.065 μm
6.5e-5 mm
1,000 MHz
1 GHz
1,000,000 kHz
128 KiB
0.125 MiB
131,072 B
1.220703e-4 GiB
1,024 KiB
1 MiB
1,048,576 B
9.765625e-4 GiB
3 W
3,000 mW
0.00402 hp
0.003 kW
2HMarch 201165 nm
0.065 μm
6.5e-5 mm
1,000 MHz
1 GHz
1,000,000 kHz
128 KiB
0.125 MiB
131,072 B
1.220703e-4 GiB
512 KiB
0.5 MiB
524,288 B
4.882812e-4 GiB
10 W
10,000 mW
0.0134 hp
0.01 kW
GC800400 MHz
0.4 GHz
400,000 KHz
Count: 10
Facts about "Godson 2 - Loongson"
designerInstitute of Computing Technology of the Chinese Academy of Sciences + and Loongson +
first announced2003 +
first launchedOctober 17, 2003 +
full page nameloongson/godson 2 +
instance ofmicroprocessor family +
instruction set architectureMIPS64 +
manufacturerSTMicroelectronics + and SMICS +
microarchitectureGS464 +
process180 nm (0.18 μm, 1.8e-4 mm) +, 130 nm (0.13 μm, 1.3e-4 mm) +, 90 nm (0.09 μm, 9.0e-5 mm) + and 65 nm (0.065 μm, 6.5e-5 mm) +
technologyCMOS +
word size64 bit (8 octets, 16 nibbles) +