Re: Question about supervisor interrupt in M mode
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Jeff Scott
Yep, think of mti as first timer interrupt and sti as second timer interrupt.
A pseudocode equation for “enabled” in the spec would make this easier. I think if you search on previous Summit proceedings, there was a presentation a long time ago that showed the equations.
Jeff
From: tech-privileged@... <tech-privileged@...>
On Behalf Of Scott Johnson via lists.riscv.org
Sent: Tuesday, November 29, 2022 10:05 AM To: tech-privileged@... Subject: [EXT] Re: [RISC-V] [tech-privileged] Question about supervisor interrupt in M mode
Caution: EXT Email Oscar, what you are missing is that STI, despite its name, is not for a lower-privilege mode when mideleg[5]==0. In that case the STI is destined for M-mode and therefore can be taken in any privilege mode. |
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