* Copyright (c) 1996, 1997, 2007 The NetBSD Foundation, Inc.

/* $NetBSD: intr.h,v 1.25 2024/01/19 20:55:42 thorpej Exp $ */

/*-
* Copyright (c) 1996, 1997, 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Leo Weppelman.
*
* 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.
*/

#ifndef _ATARI_INTR_H_
#define _ATARI_INTR_H_

#define IPL_NONE 0 /* disable no interrupts */
#define IPL_SOFTCLOCK 1
#define IPL_SOFTBIO 2
#define IPL_SOFTNET 3
#define IPL_SOFTSERIAL 4
#define IPL_VM 5
#define IPL_SCHED 6
#define IPL_HIGH 7
#define NIPL 8

#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 */

#if defined(_KERNEL) || defined(_KMEMUSER)
typedef struct {
uint16_t _psl;
} ipl_cookie_t;
#endif

/*
* spl functions; all but spl0 are done in-line
*/
#include <machine/psl.h>

/* spl0 requires checking for software interrupts */

#define splsoftclock() splraise1()
#define splsoftbio() splraise1()
#define splsoftnet() splraise1()
#define splsoftserial() splraise1()
#define splvm() splraise4()
#define splsched() splraise6()
#define splhigh() spl7()
#define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0())

#ifdef _KERNEL
int spl0(void);

extern const uint16_t ipl2psl_table[NIPL];
extern volatile unsigned int intr_depth;

typedef int ipl_t;

static inline ipl_cookie_t
makeiplcookie(ipl_t ipl)
{

return (ipl_cookie_t){._psl = ipl2psl_table[ipl]};
}

static inline int
splraiseipl(ipl_cookie_t icookie)
{

return _splraise(icookie._psl);
}

#include <sys/queue.h>
#include <machine/cpu.h> /* XXX: for clockframe */

struct clockframe;

#define AUTO_VEC 0x0001 /* We're dealing with an auto-vector */
#define USER_VEC 0x0002 /* We're dealing with an user-vector */

#define FAST_VEC 0x0010 /* Fast, stash right into vector-table */
#define ARG_CLOCKFRAME 0x0020 /* Supply clockframe as an argument */

/*
* Interrupt handler chains. intr_establish() inserts a handler into
* the list. The handler is called with its (single) argument or with a
* 'standard' clockframe. This depends on 'ih_type'.
*/
typedef int (*hw_ifun_t)(void *, int);

struct intrhand {
LIST_ENTRY(intrhand) ih_link;
hw_ifun_t ih_fun;
void *ih_arg;
int ih_type;
int ih_pri;
int ih_vector;
u_int *ih_intrcnt;
};

void intr_init(void);
struct intrhand *intr_establish(int, int, int, hw_ifun_t, void *);
int intr_disestablish(struct intrhand *);
void intr_dispatch(struct clockframe);
void intr_glue(void);

/*
* Exported by intrcnt.h
*/
extern u_long autovects[];
extern u_int intrcnt_auto[];
extern u_long uservects[];
extern u_int intrcnt_user[];

#endif /* _KERNEL */

#endif /* _ATARI_INTR_H_ */