From: Abner Chang <renba.chang@...> Initial description of PLIC CLINT section of Linux-2022 platform. On v5 commit, - Remove CLINT from platform spec - Require ACLINT on Linux2020 platform

From: Abner Chang <renba.chang@...> Signed-off-by: Abner Chang <renba.chang@...> --- contributors.adoc | 1 + 1 file changed, 1 insertion(+) diff --git a/contributors.adoc

From: Abner Chang <renba.chang@...> Initial description of PLIC CLINT section of Linux-2022 platform. On v5 commit, - Remove CLINT from platform spec - Require ACLINT on Linux2020 platform

Hi Abner, I agree with your points 1) to 3). Regards, Anup From: Abner Chang <renba.chang@...> Sent: 25 May 2021 13:46 To: Anup Patel <Anup.Patel@...> Cc: Alistair Francis

Anup Patel <Anup.Patel@...> 於 2021年5月25日 週二 下午12:39寫道： Hi Anup and Alistair. With ACLINT spec defined, I think we can revise this patch as below, 1.Remove CLINT from platform

Hi Alistar,

Hi Abner, Yesterday, we move ACLINT spec under the RISC-V International GitHub. New link of the ACLINT spec is: https://github.com/riscv/riscv-aclint/blob/master/riscv-aclint.adoc You can

Alistair Francis <Alistair.Francis@...> 於 2021年5月24日 週一 下午3:23寫道： I will remove CLINT from this patch. @Anup, how do you define the MTIME registers in ACLINT? Can we just define

Anup Patel <Anup.Patel@...> 於 2021年5月24日 週一 下午3:43寫道： This is good, may fix some controversies. Is this link valid or not public?

Thanks Jonathan.

It probably makes more sense to add a timer section and put the CLNIT there instead of forcing it into the interrupt controller section, when it isn't really an interrupt controller. I meant you

Alistair Francis <Alistair.Francis@...> 於 2021年5月24日 週一 上午11:42寫道： Can rephase it. Hmm.. CLINT is not a sort of interrupt controller but seems to me it is unnecessary to create

People indeed do questionable things all the time. But I can assure you, this one isn't going to materially affect HW cost, one way or the other.

I agree, but if this is included inside a system controller (as mtime and mtimecmp sometimes are) I'm worried that HW vendors will then just put them next to each other to condense the address space

What you're hinting at is a false economy. There really isn't any cost to having an empty two pages of address space, even in small, embedded single-core systems.

I don't think this is a contrast to the PLIC, it's just a different functionality. I'm also not sure the CLINT should be in the interrupt controller section. It is the Core Local INTerruptor (CLINT),

From: Abner Chang <renba.chang@...> Signed-off-by: Abner Chang <renba.chang@...> --- contributors.adoc | 1 + 1 file changed, 1 insertion(+) diff --git a/contributors.adoc

From: Abner Chang <renba.chang@...> Initial description of PLIC CLINT section of Linux-2022 platform. Is this what we want to see of CLINT/Machine mode timer in the platform spec? On v4

This all looks good to me now. Reviewed-by: Jonathan Behrens <behrensj@...>