usr/src/sys/i386/isa/icu.h

/*-
 * 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.
 *
 * %sccs.include.386.c%
 *
 *      @(#)icu.h       5.1 (Berkeley) %G%
 */

/*
 * AT/386 Interrupt Control constants
 * W. Jolitz 8/89
 */

#ifndef LOCORE
extern  unsigned short  imen;   /* interrupt mask enable */
extern  unsigned short  cpl;    /* current priority level */

#define INTREN(s)       imen &= ~(s)
#define INTRDIS(s)      imen |= (s)
#endif

/* Interrupt enable bits */
#define IRQ0    0x0001          /* highest priority - timer */
#define IRQ1    0x0002
#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 */