Is MIPS Dead? Lawsuit, Bankruptcy, Maintainers Leaving and More…

When in 2018, Blu posted a guest post entitled “Baikal T1 MIPS Processor – The Last of the Mohicans?” I thought maybe it was too pessimistic with regard to the future of MIPS architecture.

At the time, MIPS belonged to Imagination Technologies, but soon the company had its own financial problems and had to sell MIPS assets to Wave Computing. The latter eventually announced the launch of MIPS Open Initiative early last year,  so there was some hope as interest might pick up to compete against RISC-V and Arm again.


But in recent months, MIPS related news has not been so good. First, Wave Computing decided to end MIPS Open Initiative in November 2019, then Paul Burton and Ralf Baechle removed themselves from the Linux kernel MIPS maintainer list in February 2020, as their work with MIPS ended leaving Thomas Bogendoerfer as the only maintainer.

But this month, things turned for the worse, with CIP United filing a lawsuit against MIPS LLC on April 6, before announcing the company had obtained exclusive MIPS license rights for mainland China, Hong Kong, and Macau on April 11, 2019 (Click on News in top menu of this link).

In an article dated April 19, Semiwiki reports Wave Computing has now filed for chapter 11 bankruptcy letting all employees go. So it looks pretty bad, although there may still be some MIPS processors coming out of China in the future. but I’d expect hardware and software developments around the MIPS architecture to be seriously limited going forward, and MIPS may just eventually die off leaving the space to other IP vendors like RISC-V and Arm.

Thanks to anonymous for the tip

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12 Replies to “Is MIPS Dead? Lawsuit, Bankruptcy, Maintainers Leaving and More…”

    1. Bmips is EOL. Everything new from Broadcom is running arm. But if some party wants to buy old stuff I guess they will sell it to them if it makes sense business-wise.

  1. Chapter 11 bankruptcy is “reorganization”. The part relevant to the premise of this article is likely “The court may also permit the debtor in possession to reject and cancel contracts.”,_Title_11,_United_States_Code

    1. Bankrupts are the worst situation for patents because they’re sold to the highest offering party to cover for the rest of the losses. And you can bet that those acquiring them are not driven by the nicest intents :-/

      1. I suppose most of the important patents were already sold to ARM etc al during, so those are at least safe from trolls but not from enforcement.

        The most common MIPS version to date is still MIPS32r2. That 20 years old now (MIPS 4K and 5K), and those patents should already be expired. Not sure if anyone still wants to create another MIPS32r2 core any more after RISC-V exists and MIPS Open failed already.

        It would be fun though to have a core that can run some or all of the now patent-free RISC ISAs: RISC-V, SPARC, Power, OpenRISC, SH4, ARMv4, MIPSr2, lm32, ARC, …

        1. I wouldn’t be surprized if someone still wanted to issue MIPS32r2 cores. They must be extremely cheap given the devices where they are found, and are pretty much energy efficient. Some would possibly call them micro-controllers by now, but they definitely are found in real CPUs like a number of the AR93xx chips. I’d compare these cores to ARM’s 926 in terms of capabilities and performance. Sure it’s dated but it’s robust.

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