/*
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* Copyright (C) 2001,2002,2003 Philippe Gerum <rpm@xenomai.org>.
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*
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* Xenomai is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License,
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* or (at your option) any later version.
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*
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* Xenomai is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Xenomai; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef _COBALT_KERNEL_INTR_H
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#define _COBALT_KERNEL_INTR_H
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#include <linux/spinlock.h>
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#include <cobalt/kernel/stat.h>
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#include <pipeline/irq.h>
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/**
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* @addtogroup cobalt_core_irq
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* @{
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*/
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/* Possible return values of a handler. */
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#define XN_IRQ_NONE 0x1
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#define XN_IRQ_HANDLED 0x2
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#define XN_IRQ_STATMASK (XN_IRQ_NONE|XN_IRQ_HANDLED)
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#define XN_IRQ_PROPAGATE 0x100
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#define XN_IRQ_DISABLE 0x200
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/* Init flags. */
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#define XN_IRQTYPE_SHARED 0x1
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#define XN_IRQTYPE_EDGE 0x2
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/* Status bits. */
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#define XN_IRQSTAT_ATTACHED 0
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#define _XN_IRQSTAT_ATTACHED (1 << XN_IRQSTAT_ATTACHED)
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#define XN_IRQSTAT_DISABLED 1
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#define _XN_IRQSTAT_DISABLED (1 << XN_IRQSTAT_DISABLED)
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struct xnintr;
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struct xnsched;
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typedef int (*xnisr_t)(struct xnintr *intr);
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typedef void (*xniack_t)(unsigned irq, void *arg);
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struct xnirqstat {
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/** Number of handled receipts since attachment. */
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xnstat_counter_t hits;
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/** Runtime accounting entity */
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xnstat_exectime_t account;
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/** Accumulated accounting entity */
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xnstat_exectime_t sum;
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};
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struct xnintr {
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#ifdef CONFIG_XENO_OPT_SHIRQ
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/** Next object in the IRQ-sharing chain. */
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struct xnintr *next;
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#endif
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/** Number of consequent unhandled interrupts */
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unsigned int unhandled;
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/** Interrupt service routine. */
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xnisr_t isr;
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/** User-defined cookie value. */
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void *cookie;
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/** runtime status */
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unsigned long status;
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/** Creation flags. */
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int flags;
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/** IRQ number. */
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unsigned int irq;
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/** Interrupt acknowledge routine. */
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xniack_t iack;
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/** Symbolic name. */
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const char *name;
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/** Descriptor maintenance lock. */
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raw_spinlock_t lock;
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#ifdef CONFIG_XENO_OPT_STATS_IRQS
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/** Statistics. */
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struct xnirqstat *stats;
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#endif
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};
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struct xnintr_iterator {
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int cpu; /** Current CPU in iteration. */
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unsigned long hits; /** Current hit counter. */
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xnticks_t exectime_period; /** Used CPU time in current accounting period. */
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xnticks_t account_period; /** Length of accounting period. */
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xnticks_t exectime_total; /** Overall CPU time consumed. */
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int list_rev; /** System-wide xnintr list revision (internal use). */
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struct xnintr *prev; /** Previously visited xnintr object (internal use). */
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};
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void xnintr_core_clock_handler(void);
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void xnintr_host_tick(struct xnsched *sched);
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/* Public interface. */
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int xnintr_init(struct xnintr *intr,
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const char *name,
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unsigned irq,
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xnisr_t isr,
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xniack_t iack,
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int flags);
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void xnintr_destroy(struct xnintr *intr);
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int xnintr_attach(struct xnintr *intr,
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void *cookie, const cpumask_t *cpumask);
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void xnintr_detach(struct xnintr *intr);
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void xnintr_enable(struct xnintr *intr);
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void xnintr_disable(struct xnintr *intr);
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int xnintr_affinity(struct xnintr *intr, const cpumask_t *cpumask);
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#ifdef CONFIG_XENO_OPT_STATS_IRQS
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int xnintr_query_init(struct xnintr_iterator *iterator);
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int xnintr_get_query_lock(void);
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void xnintr_put_query_lock(void);
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int xnintr_query_next(int irq, struct xnintr_iterator *iterator,
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char *name_buf);
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#else /* !CONFIG_XENO_OPT_STATS_IRQS */
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static inline int xnintr_query_init(struct xnintr_iterator *iterator)
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{
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return 0;
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}
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static inline int xnintr_get_query_lock(void)
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{
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return 0;
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}
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static inline void xnintr_put_query_lock(void) {}
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#endif /* !CONFIG_XENO_OPT_STATS_IRQS */
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/** @} */
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#endif /* !_COBALT_KERNEL_INTR_H */
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