intr.h

/*
 * Copyright (C) 2001,2002,2003 Philippe Gerum <rpm@xenomai.org>.
 *
 * 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; either version 2 of the License,
 * or (at your option) any later version.
 *
 * Xenomai 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 Xenomai; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */
#ifndef _COBALT_KERNEL_INTR_H
#define _COBALT_KERNEL_INTR_H

#include <linux/spinlock.h>
#include <cobalt/kernel/stat.h>

/* Possible return values of a handler. */
#define XN_IRQ_NONE      0x1
#define XN_IRQ_HANDLED   0x2
#define XN_IRQ_STATMASK  (XN_IRQ_NONE|XN_IRQ_HANDLED)
#define XN_IRQ_PROPAGATE 0x100
#define XN_IRQ_DISABLE   0x200

/* Init flags. */
#define XN_IRQTYPE_SHARED  0x1
#define XN_IRQTYPE_EDGE    0x2

/* Status bits. */
#define XN_IRQSTAT_ATTACHED   0
#define _XN_IRQSTAT_ATTACHED  (1 << XN_IRQSTAT_ATTACHED)
#define XN_IRQSTAT_DISABLED   1
#define _XN_IRQSTAT_DISABLED  (1 << XN_IRQSTAT_DISABLED)

struct xnintr;
struct xnsched;

typedef int (*xnisr_t)(struct xnintr *intr);

typedef void (*xniack_t)(unsigned irq, void *arg);

struct xnirqstat {
        xnstat_counter_t hits;
        xnstat_exectime_t account;
        xnstat_exectime_t sum;
};

struct xnintr {
#ifdef CONFIG_XENO_OPT_SHIRQ

        struct xnintr *next;
#endif

        unsigned int unhandled;
        xnisr_t isr;
        void *cookie;
        unsigned long status;
        int flags;
        unsigned int irq;
        xniack_t iack;
        const char *name;
        raw_spinlock_t lock;
#ifdef CONFIG_XENO_OPT_STATS_IRQS

        struct xnirqstat *stats;
#endif
};

struct xnintr_iterator {
    int cpu;            
    unsigned long hits; 
    xnticks_t exectime_period;  
    xnticks_t account_period; 
    xnticks_t exectime_total;   
    int list_rev;       
    struct xnintr *prev;        
};

int xnintr_mount(void);

void xnintr_core_clock_handler(void);

void xnintr_host_tick(struct xnsched *sched);

void xnintr_init_proc(void);

void xnintr_cleanup_proc(void);

    /* Public interface. */

int xnintr_init(struct xnintr *intr,
                const char *name,
                unsigned irq,
                xnisr_t isr,
                xniack_t iack,
                int flags);

void xnintr_destroy(struct xnintr *intr);

int xnintr_attach(struct xnintr *intr,
                  void *cookie);

void xnintr_detach(struct xnintr *intr);

void xnintr_enable(struct xnintr *intr);

void xnintr_disable(struct xnintr *intr);

void xnintr_affinity(struct xnintr *intr,
                     cpumask_t cpumask);

#ifdef CONFIG_XENO_OPT_STATS_IRQS
extern struct xnintr nktimer;

int xnintr_query_init(struct xnintr_iterator *iterator);

int xnintr_get_query_lock(void);

void xnintr_put_query_lock(void);

int xnintr_query_next(int irq, struct xnintr_iterator *iterator,
                      char *name_buf);

#else /* !CONFIG_XENO_OPT_STATS_IRQS */

static inline int xnintr_query_init(struct xnintr_iterator *iterator)
{
        return 0;
}

static inline int xnintr_get_query_lock(void)
{
        return 0;
}

static inline void xnintr_put_query_lock(void) {}
#endif /* !CONFIG_XENO_OPT_STATS_IRQS */

#endif /* !_COBALT_KERNEL_INTR_H */