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/* $OpenBSD: intr.h,v 1.33 2009/03/25 21:41:41 miod Exp $ */
/* $NetBSD: intr.h,v 1.26 2000/06/03 20:47:41 thorpej Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* Copyright (c) 1997 Christopher G. Demetriou. All rights reserved.
* Copyright (c) 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#ifndef _ALPHA_INTR_H_
#define _ALPHA_INTR_H_
#include <sys/evcount.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/queue.h>
#include <machine/atomic.h>
/*
* The Alpha System Control Block. This is 8k long, and you get
* 16 bytes per vector (i.e. the vector numbers are spaced 16
* apart).
*
* This is sort of a "shadow" SCB -- rather than the CPU jumping
* to (SCBaddr + (16 * vector)), like it does on the VAX, we get
* a vector number in a1. We use the SCB to look up a routine/arg
* and jump to it.
*
* Since we use the SCB only for I/O interrupts, we make it shorter
* than normal, starting it at vector 0x800 (the start of the I/O
* interrupt vectors).
*/
#define SCB_IOVECBASE 0x0800
#define SCB_VECSIZE 0x0010
#define SCB_SIZE 0x2000
#define SCB_VECTOIDX(x) ((x) >> 4)
#define SCB_IDXTOVEC(x) ((x) << 4)
#define SCB_NIOVECS SCB_VECTOIDX(SCB_SIZE - SCB_IOVECBASE)
struct scbvec {
void (*scb_func)(void *, u_long);
void *scb_arg;
};
/*
* Alpha interrupts come in at one of 4 levels:
*
* software interrupt level
* i/o level 1
* i/o level 2
* clock level
*
* However, since we do not have any way to know which hardware
* level a particular i/o interrupt comes in on, we have to
* whittle it down to 3.
*/
#define IPL_NONE ALPHA_PSL_IPL_0
#define IPL_SOFTINT ALPHA_PSL_IPL_SOFT
#define IPL_BIO ALPHA_PSL_IPL_IO
#define IPL_NET ALPHA_PSL_IPL_IO
#define IPL_TTY ALPHA_PSL_IPL_IO
#define IPL_SERIAL ALPHA_PSL_IPL_IO
#define IPL_AUDIO ALPHA_PSL_IPL_IO
#define IPL_VM ALPHA_PSL_IPL_IO
#define IPL_CLOCK ALPHA_PSL_IPL_CLOCK
#define IPL_HIGH ALPHA_PSL_IPL_HIGH
#define IPL_SOFTSERIAL 0 /* serial software interrupts */
#define IPL_SOFTCLOCK 1 /* clock software interrupts */
#define IPL_SOFTNET 2 /* network software interrupts */
#define IPL_SOFT 3 /* other software interrupts */
#define IST_UNUSABLE -1 /* interrupt cannot be used */
#define IST_NONE 0 /* none (dummy) */
#define IST_PULSE 1 /* pulsed */
#define IST_EDGE 2 /* edge-triggered */
#define IST_LEVEL 3 /* level-triggered */
#define SI_SOFT 0
#define SI_SOFTCLOCK 1
#define SI_SOFTNET 2
#define SI_SOFTSERIAL 3
#define SI_NSOFT 4
#ifdef _KERNEL
/* SPL asserts */
#ifdef DIAGNOSTIC
/*
* Although this function is implemented in MI code, it must be in this MD
* header because we don't want this header to include MI includes.
*/
void splassert_fail(int, int, const char *);
extern int splassert_ctl;
void splassert_check(int, const char *);
#define splassert(__wantipl) \
do { \
if (splassert_ctl > 0) { \
splassert_check(__wantipl, __func__); \
} \
} while (0)
#define splsoftassert(wantipl) splassert(IPL_SOFTINT)
#else
#define splassert(wantipl) do { /* nothing */ } while (0)
#define splsoftassert(wantipl) do { /* nothing */ } while (0)
#endif
/* IPL-lowering/restoring macros */
#define splx(s) \
((s) == ALPHA_PSL_IPL_0 ? spl0() : alpha_pal_swpipl(s))
/* IPL-raising functions/macros */
int _splraise(int);
#define splsoft() _splraise(IPL_SOFTINT)
#define splsoftserial() splsoft()
#define splsoftclock() splsoft()
#define splsoftnet() splsoft()
#define splnet() _splraise(IPL_NET)
#define splbio() _splraise(IPL_BIO)
#define spltty() _splraise(IPL_TTY)
#define splserial() _splraise(IPL_SERIAL)
#define splaudio() _splraise(IPL_AUDIO)
#define splvm() _splraise(IPL_VM)
#define splclock() _splraise(IPL_CLOCK)
#define splstatclock() _splraise(IPL_CLOCK)
#define splhigh() _splraise(IPL_HIGH)
#define spllpt() spltty()
#define spllock() splhigh()
#define splsched() splhigh()
/*
* Interprocessor interrupts. In order how we want them processed.
*/
#define ALPHA_IPI_HALT 0x0000000000000001UL
#define ALPHA_IPI_TBIA 0x0000000000000002UL
#define ALPHA_IPI_TBIAP 0x0000000000000004UL
#define ALPHA_IPI_SHOOTDOWN 0x0000000000000008UL
#define ALPHA_IPI_IMB 0x0000000000000010UL
#define ALPHA_IPI_AST 0x0000000000000020UL
#define ALPHA_IPI_SYNCH_FPU 0x0000000000000040UL
#define ALPHA_IPI_DISCARD_FPU 0x0000000000000080UL
#define ALPHA_IPI_PAUSE 0x0000000000000100UL
#define ALPHA_NIPIS 6 /* must not exceed 64 */
typedef void (*ipifunc_t)(void);
extern ipifunc_t ipifuncs[ALPHA_NIPIS];
void alpha_send_ipi(unsigned long, unsigned long);
void alpha_broadcast_ipi(unsigned long);
void alpha_multicast_ipi(unsigned long, unsigned long);
/*
* Alpha shared-interrupt-line common code.
*/
struct alpha_shared_intrhand {
TAILQ_ENTRY(alpha_shared_intrhand)
ih_q;
struct alpha_shared_intr *ih_intrhead;
int (*ih_fn)(void *);
void *ih_arg;
int ih_level;
unsigned int ih_num;
struct evcount ih_count;
};
struct alpha_shared_intr {
TAILQ_HEAD(,alpha_shared_intrhand)
intr_q;
void *intr_private;
int intr_sharetype;
int intr_dfltsharetype;
int intr_nstrays;
int intr_maxstrays;
};
#define ALPHA_SHARED_INTR_DISABLE(asi, num) \
((asi)[num].intr_maxstrays != 0 && \
(asi)[num].intr_nstrays == (asi)[num].intr_maxstrays)
/*
* simulated software interrupt register
*/
extern unsigned long ssir;
#define setsoft(x) atomic_setbits_ulong(&ssir, 1 << (x))
struct alpha_soft_intrhand {
TAILQ_ENTRY(alpha_soft_intrhand)
sih_q;
struct alpha_soft_intr *sih_intrhead;
void (*sih_fn)(void *);
void *sih_arg;
int sih_pending;
};
struct alpha_soft_intr {
TAILQ_HEAD(, alpha_soft_intrhand)
softintr_q;
struct mutex softintr_mtx;
unsigned long softintr_siq;
};
void softintr_disestablish(void *);
void softintr_dispatch(void);
void *softintr_establish(int, void (*)(void *), void *);
void softintr_init(void);
void softintr_schedule(void *);
/* XXX For legacy software interrupts. */
extern struct alpha_soft_intrhand *softnet_intrhand;
#define setsoftnet() softintr_schedule(softnet_intrhand)
struct alpha_shared_intr *alpha_shared_intr_alloc(unsigned int);
int alpha_shared_intr_dispatch(struct alpha_shared_intr *,
unsigned int);
void *alpha_shared_intr_establish(struct alpha_shared_intr *,
unsigned int, int, int, int (*)(void *), void *, const char *);
void alpha_shared_intr_disestablish(struct alpha_shared_intr *,
void *, const char *);
int alpha_shared_intr_get_sharetype(struct alpha_shared_intr *,
unsigned int);
int alpha_shared_intr_isactive(struct alpha_shared_intr *,
unsigned int);
int alpha_shared_intr_firstactive(struct alpha_shared_intr *,
unsigned int);
void alpha_shared_intr_set_dfltsharetype(struct alpha_shared_intr *,
unsigned int, int);
void alpha_shared_intr_set_maxstrays(struct alpha_shared_intr *,
unsigned int, int);
void alpha_shared_intr_reset_strays(struct alpha_shared_intr *,
unsigned int);
void alpha_shared_intr_stray(struct alpha_shared_intr *, unsigned int,
const char *);
void alpha_shared_intr_set_private(struct alpha_shared_intr *,
unsigned int, void *);
void *alpha_shared_intr_get_private(struct alpha_shared_intr *,
unsigned int);
extern struct scbvec scb_iovectab[];
void scb_init(void);
void scb_set(u_long, void (*)(void *, u_long), void *);
u_long scb_alloc(void (*)(void *, u_long), void *);
void scb_free(u_long);
#define SCB_ALLOC_FAILED ((u_long) -1)
#endif /* _KERNEL */
#endif /* ! _ALPHA_INTR_H_ */
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