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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* @(#)icu.h 5.6 (Berkeley) 5/9/91
*
* PATCHES MAGIC LEVEL PATCH THAT GOT US HERE
* -------------------- ----- ----------------------
* CURRENT PATCH LEVEL: 1 00158
* -------------------- ----- ----------------------
*
* 25 Apr 93 Bruce Evans New fast interrupt code (intr-0.1)
*/
/*
* AT/386 Interrupt Control constants
* W. Jolitz 8/89
*/
#ifndef __ICU__
#define __ICU__
#ifndef LOCORE
/*
* Interrupt "level" mechanism variables, masks, and macros
*/
extern unsigned imen; /* interrupt mask enable */
extern unsigned cpl; /* current priority level mask */
extern unsigned highmask; /* group of interrupts masked with splhigh() */
extern unsigned ttymask; /* group of interrupts masked with spltty() */
extern unsigned biomask; /* group of interrupts masked with splbio() */
extern unsigned netmask; /* group of interrupts masked with splimp() */
#define INTREN(s) (imen &= ~(s), SET_ICUS())
#define INTRDIS(s) (imen |= (s), SET_ICUS())
#define INTRMASK(msk,s) (msk |= (s))
#if 0
#define SET_ICUS() (outb(IO_ICU1 + 1, imen), outb(IU_ICU2 + 1, imen >> 8))
#else
/*
* XXX - IO_ICU* are defined in isa.h, not icu.h, and nothing much bothers to
* include isa.h, while too many things include icu.h.
*/
#define SET_ICUS() (outb(0x21, imen), outb(0xa1, imen >> 8))
#endif
#endif
/*
* Interrupt enable bits -- in order of priority
*/
#define IRQ0 0x0001 /* highest priority - timer */
#define IRQ1 0x0002
#define IRQ_SLAVE 0x0004
#define IRQ8 0x0100
#define IRQ9 0x0200
#define IRQ2 IRQ9
#define IRQ10 0x0400
#define IRQ11 0x0800
#define IRQ12 0x1000
#define IRQ13 0x2000
#define IRQ14 0x4000
#define IRQ15 0x8000
#define IRQ3 0x0008
#define IRQ4 0x0010
#define IRQ5 0x0020
#define IRQ6 0x0040
#define IRQ7 0x0080 /* lowest - parallel printer */
/*
* Interrupt Control offset into Interrupt descriptor table (IDT)
*/
#define ICU_OFFSET 32 /* 0-31 are processor exceptions */
#define ICU_LEN 16 /* 32-47 are ISA interrupts */
#endif __ICU__
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