Re: [PATCH v2 2/4] MIPS: Introduce config options for LLSC availability
From: Thomas Bogendoerfer
Date: Thu Jun 20 2024 - 14:06:55 EST
On Thu, Jun 20, 2024 at 05:30:48PM +0100, Jiaxun Yang wrote:
>
>
> 在2024年6月20日六月 下午5:06,Thomas Bogendoerfer写道:
> [...]
> > do you have an user manual stating that the R5k bug is fixed on this CPUs ?
>
> I actually investigated R5500 a little bit.
>
> There is no explicit document mentioned this bug is fixed on R5500, but it's not
> mentioned on "VR Series 64-/32-Bit Microprocessor Programming Guide" [1] either,
> while some other hardware limitations are mentioned in that guide.
>
> Plus EMMA platform, which was removed form the kernel, doesn't have
> cpu-feature-overrides.h. This means that the platform was running with LLSC
> enabled.
>
> So I think this CPU is not affected.
found a preliminary datasheet and it supports your thinking;-)
Thomas.
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