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intr.h revision 1.3.4.2 
      1 /*	$NetBSD: intr.h,v 1.3.4.2 1997/10/14 08:46:51 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *        This product includes software developed by the NetBSD
     18  *        Foundation, Inc. and its contributors.
     19  * 4. Neither the name of The NetBSD Foundation nor the names of its
     20  *    contributors may be used to endorse or promote products derived
     21  *    from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33  * POSSIBILITY OF SUCH DAMAGE.
     34  */
     35 
     36 #ifndef _ATARI_INTR_H_
     37 #define _ATARI_INTR_H_
     38 
     39 #define	IPL_NONE	0	/* disable no interrupts	*/
     40 #define	IPL_BIO		3	/* disable block I/O interrupts */
     41 #define	IPL_NET		3	/* disable network interrupts	*/
     42 #define	IPL_TTY		4	/* disable terminal interrupts	*/
     43 #define	IPL_CLOCK	6	/* disable clock interrupts	*/
     44 #define	IPL_HIGH	7	/* disable all interrupts	*/
     45 
     46 #define	IST_UNUSABLE	-1	/* interrupt cannot be used	*/
     47 #define	IST_NONE	0	/* none (dummy)			*/
     48 #define	IST_PULSE	1	/* pulsed			*/
     49 #define	IST_EDGE	2	/* edge-triggered		*/
     50 #define	IST_LEVEL	3	/* level-triggered		*/
     51 
     52 /*
     53  * spl functions; all but spl0 are done in-line
     54  */
     55 #include <machine/psl.h>
     56 
     57 #define _spl(s)								\
     58 ({									\
     59         register int _spl_r;						\
     60 									\
     61         __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" :		\
     62                 "&=d" (_spl_r) : "di" (s));				\
     63         _spl_r;								\
     64 })
     65 
     66 #define _splraise(s)							\
     67 ({									\
     68 	int _spl_r;							\
     69 									\
     70 	__asm __volatile ("						\
     71 		clrl	d0					;	\
     72 		movw	sr,d0					;	\
     73 		movl	d0,%0					;	\
     74 		andw	#0x700,d0				;	\
     75 		movw	%1,d1					;	\
     76 		andw	#0x700,d1				;	\
     77 		cmpw	d0,d1					;	\
     78 		jle	1f					;	\
     79 		movw	%1,sr					;	\
     80 	    1:"							:	\
     81 		    "&=d" (_spl_r)				:	\
     82 		    "di" (s)					:	\
     83 		    "d0", "d1");					\
     84 	_spl_r;								\
     85 })
     86 
     87 /* spl0 requires checking for software interrupts */
     88 #define spl1()	_spl(PSL_S|PSL_IPL1)
     89 #define spl2()	_spl(PSL_S|PSL_IPL2)
     90 #define spl3()	_spl(PSL_S|PSL_IPL3)
     91 #define spl4()	_spl(PSL_S|PSL_IPL4)
     92 #define spl5()	_spl(PSL_S|PSL_IPL5)
     93 #define spl6()	_spl(PSL_S|PSL_IPL6)
     94 #define spl7()	_spl(PSL_S|PSL_IPL7)
     95 
     96 #define splnone()	spl0()
     97 #define splsoftclock()	spl1()
     98 #define splsoftnet()	spl1()
     99 
    100 #define splbio()	_splraise(PSL_S|PSL_IPL3)
    101 #define splnet()	_splraise(PSL_S|PSL_IPL3)
    102 #define spltty()	_splraise(PSL_S|PSL_IPL4)
    103 #define splimp()	_splraise(PSL_S|PSL_IPL4)
    104 
    105 #define splclock()	spl6()
    106 #define splstatclock()	spl6()
    107 #define splvm()		spl6()
    108 #define splhigh()	spl7()
    109 #define splsched()	spl7()
    110 
    111 #define splx(s)         ((s) & PSL_IPL ? _spl(s) : spl0())
    112 
    113 #ifdef _KERNEL
    114 int spl0 __P((void));
    115 #endif /* _KERNEL */
    116 
    117 #endif /* _ATARI_INTR_H_ */
    118