Editing loongson/godson 2

{{loongson title|Godson 2}}
{{ic family
| title             = Godson 2
| image             = File:godson 2 logo.svg
| caption           = Godson 2
| developer         = Institute of Computing Technology of the Chinese Academy of Sciences
| developer 2       = Loongson
| manufacturer      = STMicroelectronics
| manufacturer 2    = SMICS
| type              = Microprocessors 
| first announced   = 2003
| first launched    = October 17, 2003
| arch              = 64-bit MIPS processors
| isa               = MIPS64
| microarch         = GS464
| word              = 64 bit
| proc              = 180 nm
| proc 2            = 130 nm
| proc 3            = 90 nm
| proc 4            = 65 nm
| tech              = CMOS
| clock min         = 250 MHz
| clock max         = 1,000 MHz
| package           = 
| package 2         = 
| socket            = 
| socket 2          = 

| succession       = Yes
| predecessor      = Godson 1
| predecessor link = loongson/godson 1
| successor        = Godson 3
| successor link   = loongson/godson 3
}}
'''Godson 2''' ('''龍芯２''') is a family of {{arch|64}} [[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 {{arch|64}} microprocessors as well as the first Chinese processors to break the gigahertz frequency.

== Overview ==
{{main|loongson/microarchitectures/gs464|l1=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 {{arch|64}} [[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 {{arch|64}} 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 predictor]]s 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]] {{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 [[nettop]]s and [[tablet]]s 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]].
{{clear}}

== Members ==
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           This table is generated automatically from the data in the actual articles.
           If a microprocessor is missing from the list, an appropriate article for it needs to be
           created and tagged accordingly.

           Missing a chip? please dump its name here: http://en.wikichip.org/wiki/WikiChip:wanted_chips
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{{comp table start}}
<table class="comptable sortable tc12 tc13">
<tr class="comptable-header"><th>&nbsp;</th><th colspan="8">List of Godson-2 Processors</th></tr>
<tr class="comptable-header"><th>&nbsp;</th><th colspan="6">Processor</th><th colspan="2">[[IGP]]</th></tr>
{{comp table header 1|cols=Launched, Process, Frequency, L1$, L2$, Power, Name, Frequency}}
{{#ask: [[Category:microprocessor models by loongson]] [[instance of::microprocessor]] [[microprocessor family::Godson 2]]
 |?full page name
 |?model number
 |?first launched
 |?process
 |?base frequency#MHz
 |?l1$ size#KiB
 |?l2$ size#KiB
 |?power dissipation
 |format=template
 |?integrated gpu
 |?integrated gpu base frequency
 |template=proc table 3
 |userparam=10
 |mainlabel=-
 |sort=model number
 |order=asc
}}
{{comp table count|ask=[[Category:microprocessor models by loongson]] [[instance of::microprocessor]] [[microprocessor family::Godson 2]]}}
</table>
{{comp table end}}

== Complexity ==
{{#ask: [[Category:microprocessor models by loongson]] [[instance of::microprocessor]] [[microprocessor family::Godson 2]]
 |?model number
 |?base frequency
 |?process
 |?transistor count
 |format=jqplotseries
 |charttype=scatter
 |group=property
 |chartlegend=ne
 |cursor=sw
 |width=80%
}}
designer	Institute of Computing Technology of the Chinese Academy of Sciences + and Loongson +
first announced	2003 +
first launched	October 17, 2003 +
full page name	loongson/godson 2 +
instance of	microprocessor family +
instruction set architecture	MIPS64 +
main designer	Institute of Computing Technology of the Chinese Academy of Sciences +
manufacturer	SMICS + and STMicroelectronics +
microarchitecture	GS464 +
name	Godson 2 +
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) + and 130 nm (0.13 μm, 1.3e-4 mm) +
technology	CMOS +
word size	64 bit (8 octets, 16 nibbles) +