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NetBSD/sys/arch/next68k/include/intr.h

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Change the semantics of splsoftclock() to be like other spl*() functions, that is priority is rasied. Add a new spllowersoftclock() to provide the atomic drop-to-softclock semantics that the old splsoftclock() provided, and update calls accordingly. This fixes a problem with using the "rnd" pseudo-device from within interrupt context to extract random data (e.g. from within the softnet interrupt) where doing so would incorrectly unblock interrupts (causing all sorts of lossage). XXX 4 platforms do not have priority-raising capability: newsmips, sparc, XXX sparc64, and VAX. This platforms still have this bug until their XXX spl*() functions are fixed.
1999-08-05 22:08:08 +04:00
/* $NetBSD: intr.h,v 1.6 1999/08/05 18:08:12 thorpej Exp $ */
Initial import of NetBSD/next68k.
1998-06-09 11:53:05 +04:00
/*
* 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
/* spl0 requires checking for software interrupts */
/* watch out for side effects */
#define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0())
/****************************************************************/
renamed splscc to splserial to match spl(9) man page changed most of the spl* to use _splraise to match current usage this fixes an observed bug where zstty_attach was calling splzs causing interrupts to be turned on prematurely.
1999-07-03 12:22:53 +04:00
#define splhigh() spl7()
#define splserial() _splraise(PSL_S|PSL_IPL5)
#define splsched() _splraise(PSL_S|PSL_IPL3)
#define splclock() _splraise(PSL_S|PSL_IPL6)
Initial import of NetBSD/next68k.
1998-06-09 11:53:05 +04:00
#define splstatclock() splclock()
renamed splscc to splserial to match spl(9) man page changed most of the spl* to use _splraise to match current usage this fixes an observed bug where zstty_attach was calling splzs causing interrupts to be turned on prematurely.
1999-07-03 12:22:53 +04:00
#define splimp() _splraise(PSL_S|PSL_IPL6)
#define spltty() _splraise(PSL_S|PSL_IPL3)
#define splbio() _splraise(PSL_S|PSL_IPL3)
#define splnet() _splraise(PSL_S|PSL_IPL3)
#define splsoftnet() _splraise(PSL_S|PSL_IPL2)
Change the semantics of splsoftclock() to be like other spl*() functions, that is priority is rasied. Add a new spllowersoftclock() to provide the atomic drop-to-softclock semantics that the old splsoftclock() provided, and update calls accordingly. This fixes a problem with using the "rnd" pseudo-device from within interrupt context to extract random data (e.g. from within the softnet interrupt) where doing so would incorrectly unblock interrupts (causing all sorts of lossage). XXX 4 platforms do not have priority-raising capability: newsmips, sparc, XXX sparc64, and VAX. This platforms still have this bug until their XXX spl*() functions are fixed.
1999-08-05 22:08:08 +04:00
#define splsoftclock() splraise1()
#define spllowersoftclock() spl1()
Initial import of NetBSD/next68k.
1998-06-09 11:53:05 +04:00
renamed splscc to splserial to match spl(9) man page changed most of the spl* to use _splraise to match current usage this fixes an observed bug where zstty_attach was calling splzs causing interrupts to be turned on prematurely.
1999-07-03 12:22:53 +04:00
#define spldma() _splraise(PSL_S|PSL_IPL6)
Initial import of NetBSD/next68k.
1998-06-09 11:53:05 +04:00
/****************************************************************/
/*
* 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) \
Slightly rearrange the SSIR inline assembly implementation in order to avoid making assumptions on C symbol name prefixes.
1999-06-15 19:26:34 +04:00
__asm __volatile ( "orb %1,%0" : "=m" (ssir) : "i" (mask))
Initial import of NetBSD/next68k.
1998-06-09 11:53:05 +04:00
#define siroff(mask) \
Slightly rearrange the SSIR inline assembly implementation in order to avoid making assumptions on C symbol name prefixes.
1999-06-15 19:26:34 +04:00
__asm __volatile ( "andb %1,%0" : "=m" (ssir) : "ir" (~(mask)));
Initial import of NetBSD/next68k.
1998-06-09 11:53:05 +04:00
#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)
fixed prototype of allocate_sir()
1999-08-04 11:14:13 +04:00
extern u_long allocate_sir __P((void (*)(void *),void *));
Sync'ed more files and routines with mvme port in prepartion for UVM. Now use generic m68k cachops everywhere rather than defining them in locore.s
1998-11-11 01:45:44 +03:00
extern void init_sir __P((void));
Initial import of NetBSD/next68k.
1998-06-09 11:53:05 +04:00
/* 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_ */