On Sun, Sep 24, 2023 at 07:22:30AM +0800, Icenowy Zheng wrote:
> 在 2023-09-22星期五的 09:13 +0100，Conor Dooley写道：
> > From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
> >
> > Convert the th1520 devicetrees to use the new properties
> > "riscv,isa-base" & "riscv,isa-extensions".
> > For compatibility with other projects, "riscv,isa" remains.
> >
> > Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
> > ---
> > arch/riscv/boot/dts/thead/th1520.dtsi | 12 ++++++++++++
> > 1 file changed, 12 insertions(+)
> >
> > diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi
> > b/arch/riscv/boot/dts/thead/th1520.dtsi
> > index ce708183b6f6..723f65487246 100644
> > --- a/arch/riscv/boot/dts/thead/th1520.dtsi
> > +++ b/arch/riscv/boot/dts/thead/th1520.dtsi
> > @@ -20,6 +20,9 @@ c910_0: cpu@0 {
> > compatible = "thead,c910", "riscv";
> > device_type = "cpu";
> > riscv,isa = "rv64imafdc";
> > + riscv,isa-base = "rv64i";
> > + riscv,isa-extensions = "i", "m", "a", "f",
> > "d", "c", "zicntr", "zicsr",
> > + "zifencei", "zihpm";
>
> Zfh is supported by T-Head C9xx with float too.
You say xx, so just to be sure: Is it always supported, or only with
some config for the IP (I wanna know if I need to look out for it while
reviewing other SoCs etc)?
Also, do you have a link to the documentation for it? English is the
only relevant language I speak, so if the doc is in Chinese, I'll need
some help!
> In addition, should X extensions get listed here?
Yes, but someone who cares about documenting these extensions should do
it ;)
Thanks,
Conor.
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