Move rtems/freebsd to freebsd and contrib to freebsd/contrib

1 files changed, 186 insertions, 0 deletions

diff --git a/freebsd/sys/interrupt.h b/freebsd/sys/interrupt.h
new file mode 100644
index 00000000..87efcc51
--- /dev/null
+++ b/freebsd/sys/interrupt.h
@@ -0,0 +1,186 @@
+/*-
+ * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_INTERRUPT_HH_
+#define _SYS_INTERRUPT_HH_
+
+#include <rtems/freebsd/sys/_lock.h>
+#include <rtems/freebsd/sys/_mutex.h>
+
+struct intr_event;
+struct intr_thread;
+struct trapframe;
+
+/*
+ * Describe a hardware interrupt handler.
+ *
+ * Multiple interrupt handlers for a specific event can be chained
+ * together.
+ */
+struct intr_handler {
+	driver_filter_t	*ih_filter;	/* Filter handler function. */
+	driver_intr_t	*ih_handler;	/* Threaded handler function. */
+	void		*ih_argument;	/* Argument to pass to handlers. */
+	int		 ih_flags;
+	char		 ih_name[MAXCOMLEN + 1]; /* Name of handler. */
+	struct intr_event *ih_event;	/* Event we are connected to. */
+	int		 ih_need;	/* Needs service. */
+	TAILQ_ENTRY(intr_handler) ih_next; /* Next handler for this event. */
+	u_char		 ih_pri;	/* Priority of this handler. */
+	struct intr_thread *ih_thread;	/* Ithread for filtered handler. */
+};
+
+/* Interrupt handle flags kept in ih_flags */
+#define	IH_EXCLUSIVE	0x00000002	/* Exclusive interrupt. */
+#define	IH_ENTROPY	0x00000004	/* Device is a good entropy source. */
+#define	IH_DEAD		0x00000008	/* Handler should be removed. */
+#define	IH_MPSAFE	0x80000000	/* Handler does not need Giant. */
+
+/*
+ * Describe an interrupt event.  An event holds a list of handlers.
+ * The 'pre_ithread', 'post_ithread', 'post_filter', and 'assign_cpu'
+ * hooks are used to invoke MD code for certain operations.
+ *
+ * The 'pre_ithread' hook is called when an interrupt thread for
+ * handlers without filters is scheduled.  It is responsible for
+ * ensuring that 1) the system won't be swamped with an interrupt
+ * storm from the associated source while the ithread runs and 2) the
+ * current CPU is able to receive interrupts from other interrupt
+ * sources.  The first is usually accomplished by disabling
+ * level-triggered interrupts until the ithread completes.  The second
+ * is accomplished on some platforms by acknowledging the interrupt
+ * via an EOI.
+ *
+ * The 'post_ithread' hook is invoked when an ithread finishes.  It is
+ * responsible for ensuring that the associated interrupt source will
+ * trigger an interrupt when it is asserted in the future.  Usually
+ * this is implemented by enabling a level-triggered interrupt that
+ * was previously disabled via the 'pre_ithread' hook.
+ *
+ * The 'post_filter' hook is invoked when a filter handles an
+ * interrupt.  It is responsible for ensuring that the current CPU is
+ * able to receive interrupts again.  On some platforms this is done
+ * by acknowledging the interrupts via an EOI.
+ *
+ * The 'assign_cpu' hook is used to bind an interrupt source to a
+ * specific CPU.  If the interrupt cannot be bound, this function may
+ * return an error.
+ *
+ * Note that device drivers may also use interrupt events to manage
+ * multiplexing interrupt interrupt handler into handlers for child
+ * devices.  In that case, the above hooks are not used.  The device
+ * can create an event for its interrupt resource and register child
+ * event handlers with that event.  It can then use
+ * intr_event_execute_handlers() to execute non-filter handlers.
+ * Currently filter handlers are not supported by this, but that can
+ * be added by splitting out the filter loop from intr_event_handle()
+ * if desired.
+ */
+struct intr_event {
+	TAILQ_ENTRY(intr_event) ie_list;
+	TAILQ_HEAD(, intr_handler) ie_handlers; /* Interrupt handlers. */
+	char		ie_name[MAXCOMLEN + 1]; /* Individual event name. */
+	char		ie_fullname[MAXCOMLEN + 1];
+	struct mtx	ie_lock;
+	void		*ie_source;	/* Cookie used by MD code. */
+	struct intr_thread *ie_thread;	/* Thread we are connected to. */
+	void		(*ie_pre_ithread)(void *);
+	void		(*ie_post_ithread)(void *);
+	void		(*ie_post_filter)(void *);
+	int		(*ie_assign_cpu)(void *, u_char);
+	int		ie_flags;
+	int		ie_count;	/* Loop counter. */
+	int		ie_warncnt;	/* Rate-check interrupt storm warns. */
+	struct timeval	ie_warntm;
+	int		ie_irq;		/* Physical irq number if !SOFT. */
+	u_char		ie_cpu;		/* CPU this event is bound to. */
+};
+
+/* Interrupt event flags kept in ie_flags. */
+#define	IE_SOFT		0x000001	/* Software interrupt. */
+#define	IE_ENTROPY	0x000002	/* Interrupt is an entropy source. */
+#define	IE_ADDING_THREAD 0x000004	/* Currently building an ithread. */
+
+/* Flags to pass to sched_swi. */
+#define	SWI_DELAY	0x2
+
+/*
+ * Software interrupt numbers in priority order.  The priority determines
+ * the priority of the corresponding interrupt thread.
+ */
+#define	SWI_TTY		0
+#define	SWI_NET		1
+#define	SWI_CAMBIO	2
+#define	SWI_VM		3
+#define	SWI_CLOCK	4
+#define	SWI_TQ_FAST	5
+#define	SWI_TQ		6
+#define	SWI_TQ_GIANT	6
+
+struct proc;
+
+extern struct	intr_event *tty_intr_event;
+extern struct	intr_event *clk_intr_event;
+extern void	*softclock_ih;
+extern void	*vm_ih;
+
+/* Counts and names for statistics (defined in MD code). */
+extern u_long 	eintrcnt[];	/* end of intrcnt[] */
+extern char 	eintrnames[];	/* end of intrnames[] */
+extern u_long 	intrcnt[];	/* counts for for each device and stray */
+extern char 	intrnames[];	/* string table containing device names */
+
+#ifdef DDB
+void	db_dump_intr_event(struct intr_event *ie, int handlers);
+#endif
+u_char	intr_priority(enum intr_type flags);
+int	intr_event_add_handler(struct intr_event *ie, const char *name,
+	    driver_filter_t filter, driver_intr_t handler, void *arg, 
+	    u_char pri, enum intr_type flags, void **cookiep);	    
+int	intr_event_bind(struct intr_event *ie, u_char cpu);
+int	intr_event_create(struct intr_event **event, void *source,
+	    int flags, int irq, void (*pre_ithread)(void *),
+	    void (*post_ithread)(void *), void (*post_filter)(void *),
+	    int (*assign_cpu)(void *, u_char), const char *fmt, ...)
+	    __printflike(9, 10);
+int	intr_event_describe_handler(struct intr_event *ie, void *cookie,
+	    const char *descr);
+int	intr_event_destroy(struct intr_event *ie);
+void	intr_event_execute_handlers(struct proc *p, struct intr_event *ie);
+int	intr_event_handle(struct intr_event *ie, struct trapframe *frame);
+int	intr_event_remove_handler(void *cookie);
+int	intr_getaffinity(int irq, void *mask);
+void	*intr_handler_source(void *cookie);
+int	intr_setaffinity(int irq, void *mask);
+int	swi_add(struct intr_event **eventp, const char *name,
+	    driver_intr_t handler, void *arg, int pri, enum intr_type flags,
+	    void **cookiep);
+void	swi_sched(void *cookie, int flags);
+int	swi_remove(void *cookie);
+
+#endif