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/* $OpenBSD: intr.h,v 1.41 2010/01/18 16:59:23 miod Exp $ */
/*
* Copyright (c) 2001-2004 Opsycon AB (www.opsycon.se / www.opsycon.com)
*
* 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, 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.
*
*/
#ifndef _MACHINE_INTR_H_
#define _MACHINE_INTR_H_
/*
* The interrupt level ipl is a logical level; per-platform interrupt
* code will turn it into the appropriate hardware interrupt masks
* values.
*
* Interrupt sources on the CPU are kept enabled regardless of the
* current ipl value; individual hardware sources interrupting while
* logically masked are masked on the fly, remembered as pending, and
* unmasked at the first splx() opportunity.
*
* An exception to this rule is the clock interrupt. Clock interrupts
* are always allowed to happen, but will (of course!) not be serviced
* if logically masked. The reason for this is that clocks usually sit on
* INT5 and cannot be easily masked if external hardware masking is used.
*/
/* Interrupt priority `levels'; not mutually exclusive. */
#define IPL_NONE 0 /* nothing */
#define IPL_SOFTINT 1 /* soft interrupts */
#define IPL_BIO 2 /* block I/O */
#define IPL_AUDIO IPL_BIO
#define IPL_NET 3 /* network */
#define IPL_TTY 4 /* terminal */
#define IPL_VM 5 /* memory allocation */
#define IPL_CLOCK 6 /* clock */
#define IPL_SCHED IPL_CLOCK
#define IPL_HIGH 7 /* everything */
#define IPL_IPI 8 /* interprocessor interrupt */
#define NIPLS 9 /* Number of levels */
/* Interrupt sharing types. */
#define IST_NONE 0 /* none */
#define IST_PULSE 1 /* pulsed */
#define IST_EDGE 2 /* edge-triggered */
#define IST_LEVEL 3 /* level-triggered */
#define SINTBIT(q) (q)
#define SINTMASK(q) (1 << SINTBIT(q))
/* Soft interrupt masks. */
#define IPL_SOFT 0
#define IPL_SOFTCLOCK 1
#define IPL_SOFTNET 2
#define IPL_SOFTTTY 3
#define SI_SOFT 0 /* for IPL_SOFT */
#define SI_SOFTCLOCK 1 /* for IPL_SOFTCLOCK */
#define SI_SOFTNET 2 /* for IPL_SOFTNET */
#define SI_SOFTTTY 3 /* for IPL_SOFTTTY */
#define SI_NQUEUES 4
#ifndef _LOCORE
#include <machine/mutex.h>
#include <sys/queue.h>
struct soft_intrhand {
TAILQ_ENTRY(soft_intrhand) sih_list;
void (*sih_func)(void *);
void *sih_arg;
struct soft_intrq *sih_siq;
int sih_pending;
};
struct soft_intrq {
TAILQ_HEAD(, soft_intrhand) siq_list;
int siq_si;
struct mutex siq_mtx;
};
void softintr_disestablish(void *);
void softintr_dispatch(int);
void *softintr_establish(int, void (*)(void *), void *);
void softintr_init(void);
void softintr_schedule(void *);
/* XXX For legacy software interrupts. */
extern struct soft_intrhand *softnet_intrhand;
#define setsoftnet() softintr_schedule(softnet_intrhand)
#define splsoft() splraise(IPL_SOFTINT)
#define splbio() splraise(IPL_BIO)
#define splnet() splraise(IPL_NET)
#define spltty() splraise(IPL_TTY)
#define splaudio() splraise(IPL_AUDIO)
#define splvm() splraise(IPL_VM)
#define splclock() splraise(IPL_CLOCK)
#define splsched() splraise(IPL_SCHED)
#define splhigh() splraise(IPL_HIGH)
#define splsoftclock() splsoft()
#define splsoftnet() splsoft()
#define splstatclock() splhigh()
#define spllock() splhigh()
#define spl0() spllower(0)
void splinit(void);
#define splassert(X)
#define splsoftassert(X)
/* Inlines */
static __inline void register_splx_handler(void (*)(int));
typedef void (int_f)(int);
extern int_f *splx_hand;
static __inline void
register_splx_handler(void(*handler)(int))
{
splx_hand = handler;
}
int splraise(int);
void splx(int);
int spllower(int);
/*
* Interrupt control struct used by interrupt dispatchers
* to hold interrupt handler info.
*/
#include <sys/evcount.h>
struct intrhand {
struct intrhand *ih_next;
int (*ih_fun)(void *);
void *ih_arg;
int ih_level;
int ih_irq;
struct evcount ih_count;
int ih_flags;
#define IH_ALLOCATED 0x01
};
/*
* Low level interrupt dispatcher registration data.
*/
/* Schedule priorities for base interrupts (CPU) */
#define INTPRI_IPI 0
#define INTPRI_CLOCK 1
/* other values are system-specific */
#define NLOWINT 16 /* Number of low level registrations possible */
extern uint32_t idle_mask;
struct trap_frame;
void set_intr(int, uint32_t, uint32_t(*)(uint32_t, struct trap_frame *));
uint32_t updateimask(uint32_t);
void dosoftint(void);
#ifdef MULTIPROCESSOR
#if defined (TGT_OCTANE)
#define ENABLEIPI() updateimask(~CR_INT_2) /* enable IPI interrupt level */
#else
#error MULTIPROCESSOR kernel not supported on this configuration
#endif
#endif
#endif /* _LOCORE */
#endif /* _MACHINE_INTR_H_ */
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