118 lines
4.1 KiB
C
118 lines
4.1 KiB
C
/* $NetBSD: intr.h,v 1.2 1997/04/14 06:25:32 scottr Exp $ */
|
|
|
|
/*
|
|
* Copyright (C) 1997 Scott Reynolds
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Scott Reynolds for
|
|
* the NetBSD Project.
|
|
* 4. 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 _MAC68K_INTR_H_
|
|
#define _MAC68K_INTR_H_
|
|
|
|
#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) \
|
|
({ \
|
|
register int _spl_r; \
|
|
\
|
|
__asm __volatile ("clrl %0; movew sr,%0;" : "&=d" (_spl_r) : ); \
|
|
if ((_spl_r & PSL_IPL) < ((s) & PSL_IPL)) \
|
|
__asm __volatile ("movew %0,sr;" : : "di" (s)); \
|
|
_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)
|
|
|
|
/*
|
|
* These should be used for:
|
|
* 1) ensuring mutual exclusion (why use processor level?)
|
|
* 2) allowing faster devices to take priority
|
|
*
|
|
* Note that on the Mac, most things are masked at spl1, almost
|
|
* everything at spl2, and everything but the panic switch and
|
|
* power at spl4.
|
|
*/
|
|
#define splsoftclock() spl1() /* disallow softclock */
|
|
#define splsoftnet() spl1() /* disallow network */
|
|
#define spltty() spl1() /* disallow tty (softserial & ADB) */
|
|
#define splbio() spl2() /* disallow block I/O */
|
|
#define splnet() spl2() /* disallow network */
|
|
#define splimp() spl2() /* mutual exclusion for memory allocation */
|
|
#define splclock() spl2() /* disallow clock (and other) interrupts */
|
|
#define splstatclock() spl2() /* ditto */
|
|
#define splzs() spl4() /* disallow serial hw interrupts */
|
|
#define spladb() spl7() /* disallow adb interrupts */
|
|
#define splhigh() spl7() /* disallow everything */
|
|
#define splsched() spl7() /* disallow scheduling */
|
|
|
|
/* watch out for side effects */
|
|
#define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0())
|
|
|
|
/*
|
|
* simulated software interrupt register
|
|
*/
|
|
extern volatile u_int8_t ssir;
|
|
|
|
#define SIR_NET 0x01
|
|
#define SIR_CLOCK 0x02
|
|
#define SIR_SERIAL 0x04
|
|
|
|
#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)
|
|
|
|
/* locore.s */
|
|
int spl0 __P((void));
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _MAC68K_INTR_H_ */
|