[lttng-dev] [PATCH] liburcu: Support for NIOS2 architecture

[Marek Vasut]

On Tuesday, February 09, 2016 at 07:35:09 PM, Mathieu Desnoyers wrote:
> ----- On Feb 9, 2016, at 1:31 PM, Marek Vasut marex at denx.de wrote:
> > On Tuesday, February 09, 2016 at 07:22:38 PM, Mathieu Desnoyers wrote:
> >> ----- On Feb 9, 2016, at 11:55 AM, Marek Vasut marex at denx.de wrote:
> >> > Add support for the Altera NIOS2 CPU archirecture. The atomic
> >> > operations are handled by the GCC. The memory barriers on this
> >> > systems are entirely trivial too, since the CPU does not support SMP
> >> > at all.
> >> > 
> >> > Signed-off-by: Marek Vasut <marex at denx.de>
> >> > ---
> >> > LICENSE              |  1 +
> >> > README.md            |  1 +
> >> > configure.ac         |  1 +
> >> > urcu/arch/nios2.h    | 40 ++++++++++++++++++++++++++++++++++++++++
> >> > urcu/uatomic/nios2.h | 32 ++++++++++++++++++++++++++++++++
> >> > 5 files changed, 75 insertions(+)
> >> > create mode 100644 urcu/arch/nios2.h
> >> > create mode 100644 urcu/uatomic/nios2.h
> >> > 
> >> > diff --git a/LICENSE b/LICENSE
> >> > index 3147094..a06fdcc 100644
> >> > --- a/LICENSE
> >> > +++ b/LICENSE
> >> > @@ -45,6 +45,7 @@ compiler.h
> >> > arch/s390.h
> >> > uatomic/alpha.h
> >> > uatomic/mips.h
> >> > +uatomic/nios2.h
> >> > uatomic/s390.h
> >> > system.h
> >> > 
> >> > diff --git a/README.md b/README.md
> >> > index f6b290f..6fe9c1e 100644
> >> > --- a/README.md
> >> > +++ b/README.md
> >> > 
> >> > @@ -43,6 +43,7 @@ Currently, the following architectures are supported:
> >> >   - S390, S390x
> >> >   - ARM 32/64
> >> >   - MIPS
> >> > 
> >> > +  - NIOS2
> >> > 
> >> >   - Alpha
> >> >   - ia64
> >> >   - Sparcv9 32/64
> >> > 
> >> > diff --git a/configure.ac b/configure.ac
> >> > index 39a7777..71a7d71 100644
> >> > --- a/configure.ac
> >> > +++ b/configure.ac
> >> > @@ -124,6 +124,7 @@ AS_CASE([$host_cpu],
> >> > 
> >> > 	[arm*], [ARCHTYPE="arm"],
> >> > 	[aarch64], [ARCHTYPE="aarch64"],
> >> > 	[mips*], [ARCHTYPE="mips"],
> >> > 
> >> > +	[nios2*], [ARCHTYPE="nios2"],
> >> > 
> >> > 	[tile*], [ARCHTYPE="tile"],
> >> > 	[hppa*], [ARCHTYPE="hppa"],
> >> > 	[ARCHTYPE="unknown"]
> >> > 
> >> > diff --git a/urcu/arch/nios2.h b/urcu/arch/nios2.h
> >> > new file mode 100644
> >> > index 0000000..030d1bc
> >> > --- /dev/null
> >> > +++ b/urcu/arch/nios2.h
> >> > @@ -0,0 +1,40 @@
> >> > +#ifndef _URCU_ARCH_NIOS2_H
> >> > +#define _URCU_ARCH_NIOS2_H
> >> > +
> >> > +/*
> >> > + * arch_mips.h: trivial definitions for the NIOS2 architecture.
> >> 
> >> mips -> nops2
> > 
> > Oops :-) Now it's clear where I started. Fixed, nice catch.
> 
> of course, I meant "nios2" here (not nops2). It's a nice typo though ;)

The nios2 doens't need any nops, it's slow as it is ;-)