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intr.h revision 1.3 
      1 /*	$NetBSD: intr.h,v 1.3 1997/06/05 19:38:16 leo 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 REGENTS OR CONTRIBUTORS BE
     27  * 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 	register int _spl_r; \
     69 \
     70 	__asm __volatile ("clrl %0; movew sr,%0;" : "&=d" (_spl_r) : ); \
     71 	if ((_spl_r & PSL_IPL) < ((s) & PSL_IPL)) \
     72 		__asm __volatile ("movew %0,sr;" : : "di" (s)); \
     73 	_spl_r; \
     74 })
     75 
     76 /* spl0 requires checking for software interrupts */
     77 #define spl1()	_spl(PSL_S|PSL_IPL1)
     78 #define spl2()	_spl(PSL_S|PSL_IPL2)
     79 #define spl3()	_spl(PSL_S|PSL_IPL3)
     80 #define spl4()	_spl(PSL_S|PSL_IPL4)
     81 #define spl5()	_spl(PSL_S|PSL_IPL5)
     82 #define spl6()	_spl(PSL_S|PSL_IPL6)
     83 #define spl7()	_spl(PSL_S|PSL_IPL7)
     84 
     85 #define splnone()	spl0()
     86 #define splsoftclock()	spl1()
     87 #define splsoftnet()	spl1()
     88 
     89 #define splbio()	_splraise(PSL_S|PSL_IPL3)
     90 #define splnet()	_splraise(PSL_S|PSL_IPL3)
     91 #define spltty()	_splraise(PSL_S|PSL_IPL4)
     92 #define splimp()	_splraise(PSL_S|PSL_IPL4)
     93 
     94 #define splclock()	spl6()
     95 #define splstatclock()	spl6()
     96 #define splvm()		spl6()
     97 #define splhigh()	spl7()
     98 #define splsched()	spl7()
     99 
    100 #define splx(s)         (s & PSL_IPL ? _spl(s) : spl0())
    101 
    102 #ifdef _KERNEL
    103 int spl0 __P((void));
    104 #endif /* _KERNEL */
    105 
    106 #endif /* _ATARI_INTR_H_ */
    107 
    108