From: Peter Maydell <peter.maydell@linaro.org>
To: aurelio remonda <aurelioremonda@gmail.com>
Cc: QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [ARM]: Adding support for Cortex-M4
Date: Tue, 12 May 2015 13:58:03 +0100 [thread overview]
Message-ID: <CAFEAcA_tRDGAmAvDVFU4fgfhpMY03NR6sSeunT5MmEgqC-hspg@mail.gmail.com> (raw)
In-Reply-To: <CAE_j2pvY21anUEB6jd5=L8W5+BaJw5GFdEVLnK7yEwiLS7SSSg@mail.gmail.com>
On 12 May 2015 at 13:46, aurelio remonda <aurelioremonda@gmail.com> wrote:
> Im using lm3s6965evb stellaris board, trying to make it "work as an M4", i
> would like to separate them, adding an dsp feature (i.e ARM_FEATURE_DSP)
> could work? the problem is if this feature is added it has to be set on all
> the cpus that use dsp instructions.
You need to create a new Cortex-M4 CPU model, which can then set
the correct feature switches for the instructions and functionality
that that CPU has. If there's something that only exists on a
subset of CPUs but which we're currently providing everywhere
then we need to add a new feature bit and set it on the CPUs
which have it but not the ones which don't.
-- PMM
next prev parent reply other threads:[~2015-05-12 12:58 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-05 12:52 [Qemu-devel] [ARM]: Adding support for Cortex-M4 aurelio remonda
2015-05-05 13:04 ` Peter Maydell
[not found] ` <CAE_j2pu_S=dDcm9aTh_EoTMpwV-5coPiy6O0Em7H==7h8hWueg@mail.gmail.com>
[not found] ` <CAFEAcA824ioMJq+3WdB3qkj9WR80M_CEeZhXzokpiHgzBjvRjQ@mail.gmail.com>
2015-05-12 12:46 ` aurelio remonda
2015-05-12 12:58 ` Peter Maydell [this message]
2015-05-26 15:29 ` aurelio remonda
2015-05-26 15:36 ` Peter Maydell
2015-05-26 17:13 ` aurelio remonda
2015-05-26 17:34 ` Peter Maydell
2015-05-28 15:28 ` aurelio remonda
2015-05-28 16:00 ` Liviu Ionescu
2015-05-30 19:27 ` Liviu Ionescu
2015-05-30 20:10 ` Peter Crosthwaite
2015-05-30 20:54 ` Peter Maydell
2015-05-30 20:58 ` Peter Crosthwaite
2015-05-05 13:12 ` Liviu Ionescu
2015-05-07 18:00 ` aurelio remonda
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