/* $NetBSD: intr.h,v 1.1 2002/12/09 12:16:06 scw Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum. * * 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 the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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 _EVBPPC_INTR_H_ #define _EVBPPC_INTR_H_ /* Interrupt priority `levels'. */ #define IPL_NONE 9 /* nothing */ #define IPL_SOFTCLOCK 8 /* software clock interrupt */ #define IPL_SOFTNET 7 /* software network interrupt */ #define IPL_BIO 6 /* block I/O */ #define IPL_NET 5 /* network */ #define IPL_SOFTSERIAL 4 /* software serial interrupt */ #define IPL_TTY 3 /* terminal */ #define IPL_IMP 3 /* memory allocation */ #define IPL_AUDIO 2 /* audio */ #define IPL_CLOCK 1 /* clock */ #define IPL_HIGH 1 /* everything */ #define IPL_SERIAL 0 /* serial */ #define NIPL 10 /* Interrupt sharing types. */ #define IST_NONE 0 /* none */ #define IST_PULSE 1 /* pulsed */ #define IST_EDGE 2 /* edge-triggered */ #define IST_LEVEL 3 /* level-triggered */ #ifndef _LOCORE /* * Interrupt handler chains. intr_establish() inserts a handler into * the list. The handler is called with its (single) argument. */ struct intrhand { int (*ih_fun)(void *); void *ih_arg; u_long ih_count; struct intrhand *ih_next; int ih_level; int ih_irq; }; void setsoftclock(void); int splsoftclock(void); void setsoftnet(void); int splsoftnet(void); void do_pending_int(void); void ext_intr(void); void intr_md_register(void (*)(void *, int), void (*)(void *, int), int (*)(void *), void (*)(void *, int), void *); void *intr_establish(int, int, int, int (*)(void *), void *); void intr_disestablish(void *); void intr_init(void); static __inline int splraise(int); static __inline int spllower(int); static __inline void splx(int); static __inline void set_sint(int); extern volatile int cpl, ipending, astpending; extern u_long imask[]; extern u_long intrcnt[]; /* * Reorder protection in the following inline functions is * achived with the "eieio" instruction which the assembler * seems to detect and then doesn't move instructions past.... */ static __inline int splraise(newcpl) int newcpl; { int oldcpl; __asm__ volatile("sync; eieio\n"); /* don't reorder.... */ oldcpl = cpl; cpl = oldcpl | newcpl; __asm__ volatile("sync; eieio\n"); /* reorder protect */ return(oldcpl); } static __inline void splx(newcpl) int newcpl; { __asm__ volatile("sync; eieio\n"); /* reorder protect */ cpl = newcpl; if(ipending & ~newcpl) do_pending_int(); __asm__ volatile("sync; eieio\n"); /* reorder protect */ } static __inline int spllower(newcpl) int newcpl; { int oldcpl; __asm__ volatile("sync; eieio\n"); /* reorder protect */ oldcpl = cpl; cpl = newcpl; if(ipending & ~newcpl) do_pending_int(); __asm__ volatile("sync; eieio\n"); /* reorder protect */ return(oldcpl); } /* Following code should be implemented with lwarx/stwcx to avoid * the disable/enable. i need to read the manual once more.... */ static __inline void set_sint(pending) int pending; { int msrsave; __asm__ ("mfmsr %0" : "=r"(msrsave)); __asm__ volatile ("mtmsr %0" :: "r"(msrsave & ~PSL_EE)); ipending |= pending; __asm__ volatile ("mtmsr %0" :: "r"(msrsave)); } #define ICU_LEN 32 #define LEGAL_IRQ(x) ((x) >= 0 && (x) < ICU_LEN) #define IRQ_TO_MASK(x) (0x80000000UL >> (x)) /* * Interrupt bits 0-18 and 25-31 are used by hardware. This * leaves us bits 19-24 for stoftware. */ #define HWINT_MASK ~0x1fc0 /* Assign these to unused (reserved) interrupt bits: */ #define CNT_SINT_NET 19 #define CNT_SINT_CLOCK 20 #define CNT_SINT_SERIAL 21 #define CNT_CLOCK 22 #define CNT_STATCLOCK 23 #define SINT_NET IRQ_TO_MASK(CNT_SINT_NET) #define SINT_CLOCK IRQ_TO_MASK(CNT_SINT_CLOCK) #define SINT_SERIAL IRQ_TO_MASK(CNT_SINT_SERIAL) #define SPL_CLOCK IRQ_TO_MASK(CNT_CLOCK) #define SINT_MASK (SINT_CLOCK|SINT_NET|SINT_SERIAL) #define splbio() splraise(imask[IPL_BIO]) #define splnet() splraise(imask[IPL_NET]) #define spltty() splraise(imask[IPL_TTY]) #define splclock() splraise(imask[IPL_CLOCK]) #define splimp() splraise(imask[IPL_IMP]) #define splvm() splraise(imask[IPL_IMP]) #define splserial() splraise(imask[IPL_SERIAL]) #define splstatclock() splclock() #define spllowersoftclock() spllower(imask[IPL_SOFTCLOCK]) #define splsoftclock() splraise(imask[IPL_SOFTCLOCK]) #define splsoftnet() splraise(imask[IPL_SOFTNET]) #define splsoftserial() splraise(imask[IPL_SOFTSERIAL]) #define spllpt() spltty() #define setsoftclock() set_sint(SINT_CLOCK); #define setsoftnet() set_sint(SINT_NET); #define setsoftserial() set_sint(SINT_SERIAL); #define splhigh() splraise(imask[IPL_HIGH]) #define spl0() spllower(0) #define splsched() splhigh() #define spllock() splhigh() void softnet(void); void softserial(void); #endif /* !_LOCORE */ #endif /* !_EVBPPC_INTR_H_ */