On 20.02.21 13:45, Philippe Gerum wrote:
> From: Philippe Gerum <[email protected]>
>
> In order to intimately connect Cobalt to the kernel, Dovetail allows
> us to extend the latter with data and procedures we need:
>
> - we can embed our own context information into a set of critical
> kernel data structures. This information should be defined as a set
> of core-specific types, such as struct oob_thread_state which is
> going to be part of struct thread_info.
>
> - we can define preparation and finalization handlers for out-of-band
> IRQ handling, which Dovetail should invoke right after entering the
> outer interrupt frame, then right before leaving it respectively.
>
> Add the couple of interface headers we need to connect those elements
> to the kernel.
>
> Signed-off-by: Philippe Gerum <[email protected]>
> ---
> kernel/cobalt/include/dovetail/irq.h | 52 ++++++++++++++++++++
> kernel/cobalt/include/dovetail/thread_info.h | 33 +++++++++++++
> 2 files changed, 85 insertions(+)
> create mode 100644 kernel/cobalt/include/dovetail/irq.h
> create mode 100644 kernel/cobalt/include/dovetail/thread_info.h
>
> diff --git a/kernel/cobalt/include/dovetail/irq.h
> b/kernel/cobalt/include/dovetail/irq.h
> new file mode 100644
> index 000000000..66d020fde
> --- /dev/null
> +++ b/kernel/cobalt/include/dovetail/irq.h
> @@ -0,0 +1,52 @@
> +/*
> + * SPDX-License-Identifier: GPL-2.0
> + *
> + * Copyright (C) 2017 Philippe Gerum <[email protected]>
> + */
> +
> +#ifndef _COBALT_DOVETAIL_IRQ_H
> +#define _COBALT_DOVETAIL_IRQ_H
> +
> +#ifdef CONFIG_XENOMAI
> +
> +#include <cobalt/kernel/sched.h>
> +
> +/* hard irqs off. */
> +static inline void irq_enter_pipeline(void)
> +{
> + struct xnsched *sched = xnsched_current();
> +
> + sched->lflags |= XNINIRQ;
> +}
> +
> +/* hard irqs off. */
> +static inline void irq_exit_pipeline(void)
> +{
> + struct xnsched *sched = xnsched_current();
> +
> + sched->lflags &= ~XNINIRQ;
> +
> + /*
> + * CAUTION: Switching stages as a result of rescheduling may
> + * re-enable irqs, shut them off before returning if so.
> + */
> + if ((sched->status|sched->lflags) & XNRESCHED) {
> + xnsched_run();
> + if (!hard_irqs_disabled())
> + hard_local_irq_disable();
> + }
> +}
> +
> +#else /* !CONFIG_XENOMAI */
> +
> +static inline void irq_enter_pipeline(void)
> +{
> +}
> +
> +static inline void irq_exit_pipeline(void)
> +{
> +}
> +
> +#endif /* !CONFIG_XENOMAI */
> +
> +#endif /* !_COBALT_DOVETAIL_IRQ_H */
> diff --git a/kernel/cobalt/include/dovetail/thread_info.h
> b/kernel/cobalt/include/dovetail/thread_info.h
> new file mode 100644
> index 000000000..69b89de35
> --- /dev/null
> +++ b/kernel/cobalt/include/dovetail/thread_info.h
> @@ -0,0 +1,33 @@
> +/**
> + * Copyright (C) 2012 Philippe Gerum <[email protected]>.
> + * Copyright (c) Siemens AG, 2020
> + *
> + * Xenomai is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
> + * USA; either version 2 of the License, or (at your option) any later
> + * version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Also a stale copyright header.
> + */
> +#ifndef _COBALT_DOVETAIL_THREAD_INFO_H
> +#define _COBALT_DOVETAIL_THREAD_INFO_H
> +
> +struct xnthread;
> +struct cobalt_process;
> +
> +struct oob_thread_state {
> + /* Core thread backlink. */
> + struct xnthread *thread;
> + /* User process backlink. NULL for core threads. */
> + struct cobalt_process *process;
> +};
> +
> +#endif /* !_COBALT_DOVETAIL_THREAD_INFO_H */
>
Jan
--
Siemens AG, T RDA IOT
Corporate Competence Center Embedded Linux
