From: Peter Maydell <peter.maydell@linaro.org>
To: ido berenbaum <ido.ber3@gmail.com>
Cc: qemu-devel@nongnu.org
Subject: Re: Gpio in vexpress
Date: Tue, 16 May 2023 10:17:16 +0100 [thread overview]
Message-ID: <CAFEAcA83RoCWzZD3pOdJndtRYynf7j0GwTEZCfOz6uOv5fybnQ@mail.gmail.com> (raw)
In-Reply-To: <CANamGFG1Lq+QSMshgYChj663K=Sj19YEh8WP=HWYM6HBnpRpWw@mail.gmail.com>
On Tue, 16 May 2023 at 07:36, ido berenbaum <ido.ber3@gmail.com> wrote:
>
> Hi, I was trying to understand the architecture of the vexpress virtual machine in regards to adding new gpios that are going to be external.
> First, is it right to act as if I am developing on a physical board and add the gpios to the VexpressMachineState struct?
> Secondly, which gpio type fits here? I see that for fsl_imx7 it is the imx_gpio, but what is for vexpress? Should I create one?
> Or, can I use pl061?
The vexpress is a model of a real piece of hardware, so the
answer is "you model what the real hardware is doing". You
should be able to find that out in the technical reference
manual for the board / daughterboard.
Why are you interested in the vexpress in particular?
It is a pretty elderly development board...
thanks
-- PMM
next prev parent reply other threads:[~2023-05-16 9:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-15 15:17 Gpio in vexpress ido berenbaum
2023-05-16 9:17 ` Peter Maydell [this message]
2023-05-18 14:35 ` ido berenbaum
2023-05-18 15:01 ` Peter Maydell
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