/* $OpenBSD: intr.h,v 1.37 2009/03/15 19:40:40 miod Exp $ */ /* $NetBSD: intr.h,v 1.5 1996/05/13 06:11:28 mycroft Exp $ */ /* * Copyright (c) 1996 Charles M. Hannum. 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 Charles M. Hannum. * 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 _I386_INTR_H_ #define _I386_INTR_H_ #include #ifndef _LOCORE #include extern volatile u_int32_t lapic_tpr; /* Current interrupt priority level. */ extern int imask[]; /* Bitmasks telling what interrupts are blocked. */ extern int iunmask[]; /* Bitmasks telling what interrupts are accepted. */ #define IMASK(level) imask[IPL(level)] #define IUNMASK(level) iunmask[IPL(level)] extern void Xspllower(void); extern int splraise(int); extern int spllower(int); extern void splx(int); extern void softintr(int); /* * compiler barrier: prevent reordering of instructions. * XXX something similar will move to * or thereabouts. * This prevents the compiler from reordering code around * this "instruction", acting as a sequence point for code generation. */ #define __splbarrier() __asm __volatile("":::"memory") /* SPL asserts */ #ifdef DIAGNOSTIC /* * Although this function is implemented in MI code, it must be in this MD * header because we don't want this header to include MI includes. */ void splassert_fail(int, int, const char *); extern int splassert_ctl; void splassert_check(int, const char *); #define splassert(__wantipl) do { \ if (splassert_ctl > 0) { \ splassert_check(__wantipl, __func__); \ } \ } while (0) #define splsoftassert(wantipl) splassert(wantipl) #else #define splassert(wantipl) do { /* nada */ } while (0) #define splsoftassert(wantipl) do { /* nada */ } while (0) #endif /* * Define the splraise and splx code in macros, so that the code can be * reused in a profiling build in a way that does not cause recursion. */ #define _SPLRAISE(ocpl, ncpl) \ ocpl = lapic_tpr; \ if (ncpl > ocpl) \ lapic_tpr = ncpl #define _SPLX(ncpl) \ lapic_tpr = ncpl; \ if (curcpu()->ci_ipending & IUNMASK(ncpl)) \ Xspllower() /* * Hardware interrupt masks */ #define splbio() splraise(IPL_BIO) #define splnet() splraise(IPL_NET) #define spltty() splraise(IPL_TTY) #define splaudio() splraise(IPL_AUDIO) #define splclock() splraise(IPL_CLOCK) #define splstatclock() splhigh() #define splipi() splraise(IPL_IPI) /* * Software interrupt masks */ #define splsoftclock() splraise(IPL_SOFTCLOCK) #define splsoftnet() splraise(IPL_SOFTNET) #define splsofttty() splraise(IPL_SOFTTTY) /* * Miscellaneous */ #define splvm() splraise(IPL_VM) #define splhigh() splraise(IPL_HIGH) #define splsched() splraise(IPL_SCHED) #define spllock() splhigh() #define spl0() spllower(IPL_NONE) #define setsoftnet() softintr(SIR_NET) #define setsofttty() softintr(SIR_TTY) struct cpu_info; #ifdef MULTIPROCESSOR int i386_send_ipi(struct cpu_info *, int); int i386_fast_ipi(struct cpu_info *, int); void i386_broadcast_ipi(int); void i386_multicast_ipi(int, int); void i386_ipi_handler(void); void i386_intlock(int); void i386_intunlock(int); void i386_softintlock(void); void i386_softintunlock(void); void i386_setperf_ipi(struct cpu_info *); extern void (*ipifunc[I386_NIPI])(struct cpu_info *); #endif #endif /* !_LOCORE */ /* * Generic software interrupt support. */ #define I386_SOFTINTR_SOFTCLOCK 0 #define I386_SOFTINTR_SOFTNET 1 #define I386_SOFTINTR_SOFTTTY 2 #define I386_NSOFTINTR 3 #ifndef _LOCORE #include struct i386_soft_intrhand { TAILQ_ENTRY(i386_soft_intrhand) sih_q; struct i386_soft_intr *sih_intrhead; void (*sih_fn)(void *); void *sih_arg; int sih_pending; }; struct i386_soft_intr { TAILQ_HEAD(, i386_soft_intrhand) softintr_q; int softintr_ssir; struct simplelock softintr_slock; }; #define i386_softintr_lock(si, s) \ do { \ (s) = splhigh(); \ simple_lock(&si->softintr_slock); \ } while (/*CONSTCOND*/ 0) #define i386_softintr_unlock(si, s) \ do { \ simple_unlock(&si->softintr_slock); \ splx((s)); \ } while (/*CONSTCOND*/ 0) void *softintr_establish(int, void (*)(void *), void *); void softintr_disestablish(void *); void softintr_init(void); void softintr_dispatch(int); #define softintr_schedule(arg) \ do { \ struct i386_soft_intrhand *__sih = (arg); \ struct i386_soft_intr *__si = __sih->sih_intrhead; \ int __s; \ \ i386_softintr_lock(__si, __s); \ if (__sih->sih_pending == 0) { \ TAILQ_INSERT_TAIL(&__si->softintr_q, __sih, sih_q); \ __sih->sih_pending = 1; \ softintr(__si->softintr_ssir); \ } \ i386_softintr_unlock(__si, __s); \ } while (/*CONSTCOND*/ 0) #endif /* _LOCORE */ #endif /* !_I386_INTR_H_ */