/*
|
* SPDX-License-Identifier: GPL-2.0
|
*
|
* Copyright (C) 2020 Philippe Gerum <rpm@xenomai.org>
|
*/
|
|
#ifndef _COBALT_KERNEL_IPIPE_SIRQ_H
|
#define _COBALT_KERNEL_IPIPE_SIRQ_H
|
|
#include <linux/ipipe.h>
|
#include <pipeline/machine.h>
|
|
/*
|
* Wrappers to create "synthetic IRQs" the I-pipe way (used to be
|
* called "virtual IRQs" there). Those interrupt channels can only be
|
* triggered by software; they have per-CPU semantics. We use them to
|
* schedule handlers to be run on the in-band execution stage, meaning
|
* "secondary mode" in the Cobalt jargon.
|
*/
|
|
static inline
|
int pipeline_create_inband_sirq(irqreturn_t (*handler)(int irq, void *dev_id))
|
{
|
int sirq, ret;
|
|
sirq = ipipe_alloc_virq();
|
if (sirq == 0)
|
return -EAGAIN;
|
|
/*
|
* ipipe_irq_handler_t is close enough to the signature of a
|
* regular IRQ handler: use the latter in the generic code
|
* shared with Dovetail. The extraneous return code will be
|
* ignored by the I-pipe core.
|
*/
|
ret = ipipe_request_irq(ipipe_root_domain, sirq,
|
(ipipe_irq_handler_t)handler,
|
NULL, NULL);
|
if (ret) {
|
ipipe_free_virq(sirq);
|
return ret;
|
}
|
|
return sirq;
|
}
|
|
static inline
|
void pipeline_delete_inband_sirq(int sirq)
|
{
|
ipipe_free_irq(ipipe_root_domain, sirq);
|
ipipe_free_virq(sirq);
|
}
|
|
static inline void pipeline_post_sirq(int sirq)
|
{
|
ipipe_post_irq_root(sirq);
|
}
|
|
#endif /* !_COBALT_KERNEL_IPIPE_SIRQ_H */
|
