Comment by smoldesu | Hacker News Reader

Comment by smoldesu | Hacker News Reader

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> As a layperson though, how would I be able to tell whether any of this is true?

You probably won't ever know. Do you know the architecture of the microcontroller on your first computer's hard drive? I don't.

The stuff that RISC-V will replace first is the low-margin hardware that can be mass-produced by China et. al and exported without license violation. ARM's goose was already cooked in this sense, and even ARM China won't fix it. For IO controllers, ICs and network switches, it's hard to see why manufacturers would stick with higher-margin ARM hardware. If RISC-V cores are cheap, stable and available, you could replace them without the user ever noticing.

> By the time Apple is shipping a RISC-V phone I hope to be retired!

Apple is reportedly looking to replace some of their A-series ICs with RISC-V ones: https://www.techpowerup.com/298936/report-apple-to-move-a-pa...

Hopefully you don't intend to retire this soon :p

Apple holds a rare Architecture license to the ARM ISA due to their role as a founding partner, and can make original implementations without incurring licensing dues, as they do with the A and M series CPUs. I understand why they would want to switch to homegrown designs instead of licensing ARM reference designs (which they do have to pay for), but why migrate instruction sets too when RISC-V doesn't save them any marginal cost over novel ARM designs that would be binary compatible with the existing firmware?

> Apple holds a rare Architecture license to the ARM ISA due to their role as a founding partner, and can make original implementations without incurring licensing dues

Sorry, the architecture license wasn’t a thing when Arm was founded and there is no way that Arm would hand out free licenses at a later date. It’s just a myth.

"We have entered into a new long-term agreement with Apple that extends beyond 2040, continuing our longstanding relationship of collaboration with Apple and Apple's access to the Arm architecture," - ARM's IPO Document.

I assume they paid something for it, but who knows how much, ARM and Apple have not decided to tell us.

Source: https://www.sec.gov/Archives/edgar/data/1973239/000119312523...

Western Digital announced an open source core ("SweRV") in 2019, so I assume they already use them now that we are a few years on from that announcement.

https://github.com/westerndigitalcorporation/swerv_eh1

https://news.ycombinator.com/item?id=25002448

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