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CLIC or CLINT? #2

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lbmeng opened this issue Apr 26, 2021 · 5 comments
Open

CLIC or CLINT? #2

lbmeng opened this issue Apr 26, 2021 · 5 comments

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@lbmeng
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lbmeng commented Apr 26, 2021

In https://github.com/starfive-tech/beaglev_doc/raw/main/JH7100%20Data%20Sheet%20V01.01.04-EN%20(4-21-2021).pdf,

on page#12, it says the following for "SiFive U74 Dual-Core":

CLIC for timer and software interrupts

and on page#13, it says the following for "SiFive E24 Core":

CLIC with support for up to 127 interrupts with 16 priority levels

Are they correct? Should it be CLINT?

@pdp7
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pdp7 commented Apr 26, 2021

Yes, I think you are correct that it should be CLINT. I believe SiFive uses Core-Local Interruptor (CLINT) (see page 31 in SiFive U7 manual) as their implementation of the CLIC.

@davidlt @tekkamanninja is that correct?

@MichaelZhuxx
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For U74 Dual-Core, use CLINT and PLIC, please refer to https://github.com/starfive-tech/beaglev_doc/blob/main/vic_u7_manual_with_creativecommons.pdf

For E24 Core,use CLIC https://www.sifive.com/cores/e24

@lbmeng
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lbmeng commented Apr 27, 2021

Thanks for the clarification!

@lbmeng lbmeng closed this as completed Apr 27, 2021
@pdp7
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pdp7 commented May 2, 2021

I am leaving open until there is new PDF

@pdp7 pdp7 reopened this May 2, 2021
@whuhujin
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U7 core supports CLINT + PLIC , and E24 supports CLIC.

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