next68k/include/intr.h

/*	$NetBSD: intr.h,v 1.2 1998/11/10 22:45:44 dbj Exp $	*/

/*
 * Copyright (C) 1997 Scott Reynolds
 * Copyright (C) 1998 Darrin Jewell
 * 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, 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * 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 _NEXT68K_INTR_H_
#define _NEXT68K_INTR_H_

#include <machine/psl.h>

/* Probably want to dealwith IPL's here @@@ */

#ifdef _KERNEL
/*
 * spl functions; all but spl0 are done in-line
 */

#define _spl(s)								\
({									\
        register int _spl_r;						\
									\
        __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" :		\
                "&=d" (_spl_r) : "di" (s));				\
        _spl_r;								\
})

#define _splraise(s)							\
({									\
	int _spl_r;							\
									\
	__asm __volatile ("						\
		clrl	d0					;	\
		movw	sr,d0					;	\
		movl	d0,%0					;	\
		andw	#0x700,d0				;	\
		movw	%1,d1					;	\
		andw	#0x700,d1				;	\
		cmpw	d0,d1					;	\
		jle	1f					;	\
		movw	%1,sr					;	\
	    1:"							:	\
		    "&=d" (_spl_r)				:	\
		    "di" (s)					:	\
		    "d0", "d1");					\
	_spl_r;								\
})

/* spl0 requires checking for software interrupts */
#define spl1()  _spl(PSL_S|PSL_IPL1)
#define spl2()  _spl(PSL_S|PSL_IPL2)
#define spl3()  _spl(PSL_S|PSL_IPL3)
#define spl4()  _spl(PSL_S|PSL_IPL4)
#define spl5()  _spl(PSL_S|PSL_IPL5)
#define spl6()  _spl(PSL_S|PSL_IPL6)
#define spl7()  _spl(PSL_S|PSL_IPL7)

/* watch out for side effects */
#define splx(s)         ((s) & PSL_IPL ? _spl(s) : spl0())

/****************************************************************/

#define spldma()        spl6()

#define splscc()        spl5()

#define splsched()      spl3()

/* IPL used by soft interrupts: netintr(), softclock() */
#define splsoftclock()  spl1()
#define splsoftnet()    spl2()


/* Highest block device (strategy) IPL. */
#define splbio()        spl3()

/* Highest tty device IPL. */
#define spltty()        spl1()

/* Highest network interface IPL. */
#define splnet()        spl2()

/*
 * Requirement: imp >= (highest network, tty, or disk IPL)
 * This is used mostly in the VM code. (Why not splvm?)
 * Note that the VM code runs at spl7 during kernel
 * initialization, and later at spl0, so we have to
 * use splraise to avoid enabling interrupts early.
 */
#if 0
#define splimp()        _splraise(PSL_S|PSL_IPL3)
#else
#define splimp()        _splraise(PSL_S|PSL_IPL6)
#endif

#define splclock()      spl6()
#define splstatclock()  splclock()

/* Block out all interrupts (except NMI of course). */
#define splhigh()       spl7()

/****************************************************************/

/*
 * simulated software interrupt register
 */
extern volatile u_int8_t ssir;

#define	SIR_NET		0x01
#define	SIR_CLOCK	0x02
#define	SIR_SERIAL	0x04
#define SIR_DTMGR	0x08
#define SIR_ADB		0x10

#define	siron(mask)	\
	__asm __volatile ( "orb %0,_ssir" : : "i" (mask))
#define	siroff(mask)	\
	__asm __volatile ( "andb %0,_ssir" : : "ir" (~(mask)));

#define	setsoftnet()	siron(SIR_NET)
#define	setsoftclock()	siron(SIR_CLOCK)
#define	setsoftserial()	siron(SIR_SERIAL)
#define	setsoftdtmgr()	siron(SIR_DTMGR)
#define	setsoftadb()	siron(SIR_ADB)

extern u_long allocate_sir __P((void (*)(void),void *));
extern void init_sir __P((void));

/* locore.s */
int	spl0 __P((void));
#endif /* _KERNEL */

#define INTR_SETMASK(x)  ((*(volatile u_long *)IIOV(NEXT_P_INTRMASK))=(x))
#define INTR_ENABLE(x)   ((*(volatile u_long *)IIOV(NEXT_P_INTRMASK))|=NEXT_I_BIT(x))
#define INTR_DISABLE(x)  ((*(volatile u_long *)IIOV(NEXT_P_INTRMASK))&=(~NEXT_I_BIT(x)))
#define INTR_OCCURRED(x)  ((*(volatile u_long *)IIOV(NEXT_P_INTRSTAT))& NEXT_I_BIT(x))

#endif /* _NEXT68K_INTR_H_ */