initial import of NetBSD tree

1 files changed, 83 insertions, 0 deletions

diff --git a/sys/arch/i386/isa/icu.h b/sys/arch/i386/isa/icu.h
new file mode 100644
index 00000000000..d9a7e144d28
--- /dev/null
+++ b/sys/arch/i386/isa/icu.h
@@ -0,0 +1,83 @@
+/*	$NetBSD: icu.h,v 1.17 1994/11/04 19:13:49 mycroft Exp $	*/
+
+/*-
+ * 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
+ */
+
+/*
+ * AT/386 Interrupt Control constants
+ * W. Jolitz 8/89
+ */
+
+#ifndef	_I386_ISA_ICU_H_
+#define	_I386_ISA_ICU_H_
+
+#ifndef	LOCORE
+
+/*
+ * Interrupt "level" mechanism variables, masks, and macros
+ */
+extern	unsigned imen;		/* interrupt mask enable */
+
+#define	INTRUNMASK(msk,s)	(msk &= ~(s))
+#define	INTREN(s)		(INTRUNMASK(imen, s), SET_ICUS())
+#define	INTRMASK(msk,s)		(msk |= (s))
+#define	INTRDIS(s)		(INTRMASK(imen, s), SET_ICUS())
+#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 /* !LOCORE */
+
+/*
+ * Interrupt enable bits -- in order of priority
+ */
+#define	IRQ_SLAVE	2
+
+/*
+ * 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 /* !_I386_ISA_ICU_H_ */