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Re: [Qemu-devel] when to check external interrupt request ? or what is t
From: |
Blue Swirl |
Subject: |
Re: [Qemu-devel] when to check external interrupt request ? or what is the timing to check and arise external interrupt ? |
Date: |
Fri, 25 Feb 2011 17:19:42 +0200 |
On Tue, Feb 22, 2011 at 6:47 AM, wang sheng <address@hidden> wrote:
> I'm porting qemu to an new architecture. I come across some difficulty
> that I can't define the timing that enable qemu's main-thread to be
> interrupt and check external interrupt .
>
> I understand the way that mips used to check external interrupt .
>
> in qemu-system-mips , during do translation , if there is an
> instruction that access CP0's Status register and Cause register, the
> "target-mips/translate.c" will add a calling to function "
> helper_interrupt_restart" in the end of the translation_block.
>
> But in my architecture which use "load/st" instruction to access the
> contr register in interrupt controller . Because I can't
> distinguish the access for normal memory and access for interrupt
> controller's register , I can't add "interrupt_restart" function
> calling in the end of translation block.
>
> How can I do to enable qemu have chance to check external interrupt ?
Please try something similar to how cpu_request_exit function and
signal is used by hw/dma.c and hw/pc.c.