Unicore


Unicore
DesignerMicroprocessor Research and Development Center
Bits32-bit
Introduced1999
DesignRISC
EncodingFixed
BranchingCondition code
EndiannessLittle
Page size4 KiB
Registers
General purpose31
Floating point32

Unicore is the name of a computer instruction set architecture designed by the Microprocessor Research and Development Center (MPRC) of Peking University in the PRC. The computer built on this architecture is called the Unity-863.[1] The CPU is integrated into a fully functional SoC to make a PC-like system.[2]

The processor is very similar to the ARM architecture, but uses a different instruction set.[3][better source needed]

It is supported by the Linux kernel as of version 2.6.39.[4] Support will be removed in Linux kernel version 5.9 as nobody seems to maintain it and the code is falling behind the rest of the kernel code and compiler requirements.[5]

  1. ^ "Introduction to MPRC". Microprocessor Research and Develop Center, Peking University.
  2. ^ Xu Cheng; Xiaoyin Wang; Junlin Lu; Jiangfang Yi; Dong Tong; Xuetao Guan; Feng Liu; Xianhua Liu; Chun Yang; Yi Feng (March 2010), "Research Progress of UniCore CPUs and PKUnity SoCs" (PDF), Journal of Computer Science and Technology (JCST), 25 (2): 200–213, doi:10.1007/s11390-010-9317-1, S2CID 7083916, retrieved 2012-07-11
  3. ^ Bergmann, Arnd (2012-07-09). "Re: [PATCH 00/36] AArch64 Linux kernel port". linux-kernel (Mailing list). Retrieved 2012-07-11. Another interesting example is unicore32, which actually shares more code with arch/arm than the proposed arch/aarch64 does. I think the unicore32 code base would benefit from being merged back into arch/arm as a third instruction set, but the additional maintenance cost for everyone working on ARM makes that unrealistic.
  4. ^ "Merge window closed - 2.6.39-rc1 out". Linus Torvalds.
  5. ^ "remove unicore32 support". Mike Rapoport.

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