Re: [Qemu-devel] [PATCH v3 4/7] target/arm: add "cortex-m0" CPU model

[Stefan Hajnoczi <stefanha@gmail.com>]

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On Mon, Jul 30, 2018 at 06:52:29PM +0100, Peter Maydell wrote:
> On 25 July 2018 at 09:59, Stefan Hajnoczi <stefanha@redhat.com> wrote:
> > Define a "cortex-m0" ARMv6-M CPU model.
> >
> > Most of the register reset values set by other CPU models are not
> > relevant for the cut-down ARMv6-M architecture.
> >
> > Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> > ---
> >  target/arm/cpu.c | 11 +++++++++++
> >  1 file changed, 11 insertions(+)
> >
> > diff --git a/target/arm/cpu.c b/target/arm/cpu.c
> > index 3848ef46aa..7e477c0d23 100644
> > --- a/target/arm/cpu.c
> > +++ b/target/arm/cpu.c
> > @@ -1255,6 +1255,15 @@ static void arm11mpcore_initfn(Object *obj)
> >      cpu->reset_auxcr = 1;
> >  }
> >
> > +static void cortex_m0_initfn(Object *obj)
> > +{
> > +    ARMCPU *cpu = ARM_CPU(obj);
> > +    set_feature(&cpu->env, ARM_FEATURE_V6);
> > +    set_feature(&cpu->env, ARM_FEATURE_M);
> > +
> > +    cpu->midr = 0x410cc200;
> > +}
> 
> We have all the patches for turning off not-v6M bits of
> behaviour either in master or in target-arm.for-3.1 already,
> right?

Yes.  I've sent this series because Julia's work is now in
target-arm.for-3.1.

Stefan

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