From d6583bb2a13f329cf0332ef2570eb8bb8fc0e39c Mon Sep 17 00:00:00 2001
From: Theo de Raadt <deraadt@cvs.openbsd.org>
Date: Wed, 18 Oct 1995 08:53:40 +0000
Subject: initial import of NetBSD tree

---
 sys/arch/alpha/include/psl.h | 85 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 sys/arch/alpha/include/psl.h

(limited to 'sys/arch/alpha/include/psl.h')

diff --git a/sys/arch/alpha/include/psl.h b/sys/arch/alpha/include/psl.h
new file mode 100644
index 00000000000..3b019596c44
--- /dev/null
+++ b/sys/arch/alpha/include/psl.h
@@ -0,0 +1,85 @@
+/*	$NetBSD: psl.h,v 1.3 1995/08/03 00:03:09 cgd Exp $	*/
+
+/*
+ * Copyright (c) 1994, 1995 Carnegie-Mellon University.
+ * All rights reserved.
+ *
+ * Author: Chris G. Demetriou
+ * 
+ * Permission to use, copy, modify and distribute this software and
+ * its documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
+ * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+
+/*
+ * Processor Status register definitions.
+ */
+#define	PSL_U		0x08		/* PS<3> == 1 -> User mode */
+#define	PSL_IPL		0x07		/* PS<2:0> -> Interrupt mask */
+
+/*
+ * The interrupt priority levels.
+ * Other IPL's are configured in software, and are listed below.
+ */
+#define	PSL_IPL_0	0		/* all interrupts enabled */
+#define PSL_IPL_SOFT	1		/* block software interrupts */
+#define	PSL_IPL_IO	4		/* block I/O device interrupts */
+#define	PSL_IPL_CLOCK	5		/* block clock interrupts */
+#define	PSL_IPL_HIGH	6		/* block everything except mchecks */
+
+/*
+ * Miscellaneous PSL definitions
+ */
+#define	PSL_MBZ		(0xfffffffffffffff0)	/* Must be always zero */
+#define	PSL_USERSET	(PSL_U)			/* Must be set for user-mode */
+#define	PSL_USERCLR	(PSL_MBZ|PSL_IPL)	/* Must be clr for user-mode */
+#define	USERMODE(ps)	((ps & PSL_U) != 0)	/* Is it user-mode? */
+
+#ifdef _KERNEL
+/*
+ * Translation buffer invalidation macro definitions.
+ */
+#define	TBI_A		-2		/* Flush all TB entries */
+#define	TBI_AP		-1		/* Flush all per-process TB entries */
+#define	TBI_SI		1		/* Invalidate ITB entry for va */
+#define	TBI_SD		2		/* Invalidate DTB entry for va */
+#define	TBI_S		3		/* Invalidate all entries for va */
+
+#define	TBIA()		pal_tbi(TBI_A, NULL)
+#define	TBIAP()		pal_tbi(TBI_AP, NULL)
+#define	TBISI(va)	pal_tbi(TBI_SI, va)
+#define	TBISD(va)	pal_tbi(TBI_SD, va)
+#define	TBIS(va)	pal_tbi(TBI_S, va)
+
+/*
+ * Cache invalidation/flush routines.
+ */
+#if 0
+#define	wbflush()	alpha_mb()	/* Flush all write buffers */
+#else
+/* Flush all write buffers */
+#define	wbflush()	__asm __volatile("mb")
+#endif
+#define	IMB()		pal_imb()	/* Sync instruction cache w/data */
+
+void alpha_mb __P((void));		/* Flush all write buffers */
+void pal_imb __P((void));		/* Sync instruction cache */
+u_int64_t pal_swpipl __P((u_int64_t));	/* write new IPL, return old */
+void pal_tbi __P((u_int64_t, void *));	/* Invalidate TLB entries */
+#endif /* _KERNEL */
-- 
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