Bring in NetBSD code used in the PowerPC port.

Reviewed by:	obrien, dfr
Obtained from:	NetBSD

1 files changed, 93 insertions, 0 deletions

diff --git a/sys/powerpc/include/trap.h b/sys/powerpc/include/trap.h
new file mode 100644
index 0000000..dd359d2
--- /dev/null
+++ b/sys/powerpc/include/trap.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 1995, 1996 Wolfgang Solfrank.
+ * Copyright (C) 1995, 1996 TooLs GmbH.
+ * All rights reserved.
+ *
+ * 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 TooLs GmbH.
+ * 4. The name of TooLs GmbH may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
+ *
+ *	$NetBSD: trap.h,v 1.3 2000/05/25 21:10:14 is Exp $
+ * $FreeBSD$
+ */
+
+#ifndef	_POWERPC_TRAP_H_
+#define	_POWERPC_TRAP_H_
+
+#define	EXC_RSVD	0x0000		/* Reserved */
+#define	EXC_RST		0x0100		/* Reset */
+#define	EXC_MCHK	0x0200		/* Machine Check */
+#define	EXC_DSI		0x0300		/* Data Storage Interrupt */
+#define	EXC_ISI		0x0400		/* Instruction Storage Interrupt */
+#define	EXC_EXI		0x0500		/* External Interrupt */
+#define	EXC_ALI		0x0600		/* Alignment Interrupt */
+#define	EXC_PGM		0x0700		/* Program Interrupt */
+#define	EXC_FPU		0x0800		/* Floating-point Unavailable */
+#define	EXC_DECR	0x0900		/* Decrementer Interrupt */
+#define	EXC_SC		0x0c00		/* System Call */
+#define	EXC_TRC		0x0d00		/* Trace */
+#define	EXC_FPA		0x0e00		/* Floating-point Assist */
+
+/* The following are only available on 604: */
+#define	EXC_PERF	0x0f00		/* Performance Monitoring */
+#define	EXC_BPT		0x1300		/* Instruction Breakpoint */
+#define	EXC_SMI		0x1400		/* System Managment Interrupt */
+
+/* And these are only on the 603: */
+#define	EXC_IMISS	0x1000		/* Instruction translation miss */
+#define	EXC_DLMISS	0x1100		/* Data load translation miss */
+#define	EXC_DSMISS	0x1200		/* Data store translation miss */
+
+#define	EXC_LAST	0x2f00		/* Last possible exception vector */
+
+#define	EXC_AST		0x3000		/* Fake AST vector */
+
+/* Trap was in user mode */
+#define	EXC_USER	0x10000
+
+
+/*
+ * EXC_ALI sets bits in the DSISR and DAR to provide enough
+ * information to recover from the unaligned access without needing to
+ * parse the offending instruction. This includes certain bits of the
+ * opcode, and information about what registers are used. The opcode
+ * indicator values below come from Appendix F of Book III of "The
+ * PowerPC Architecture".
+ */
+
+#define	EXC_ALI_OPCODE_INDICATOR(dsisr) ((dsisr >> 10) & 0x7f)
+#define	EXC_ALI_LFD	0x09
+#define	EXC_ALI_STFD	0x0b
+
+/* Macros to extract register information */
+#define	EXC_ALI_RST(dsisr) ((dsisr >> 5) & 0x1f)   /* source or target */
+#define	EXC_ALI_RA(dsisr) (dsisr & 0x1f)
+
+#ifndef	LOCORE
+
+void	trap(struct trapframe *);
+
+#endif /* !LOCORE */
+
+#endif	/* _POWERPC_TRAP_H_ */