Initial source

1 files changed, 71 insertions, 0 deletions

diff --git a/i386/pc/debug.h b/i386/pc/debug.h
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+/* 
+ * Copyright (c) 1995-1994 The University of Utah and
+ * the Computer Systems Laboratory at the University of Utah (CSL).
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify and distribute this software is hereby
+ * granted provided that (1) source code retains these copyright, permission,
+ * and disclaimer notices, and (2) redistributions including binaries
+ * reproduce the notices in supporting documentation, and (3) all advertising
+ * materials mentioning features or use of this software display the following
+ * acknowledgement: ``This product includes software developed by the
+ * Computer Systems Laboratory at the University of Utah.''
+ *
+ * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
+ * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
+ * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * CSL requests users of this software to return to csl-dist@cs.utah.edu any
+ * improvements that they make and grant CSL redistribution rights.
+ *
+ *      Author: Bryan Ford, University of Utah CSL
+ */
+#ifndef _KUKM_I386_PC_DEBUG_H_
+#define _KUKM_I386_PC_DEBUG_H_
+
+#ifdef ASSEMBLER
+#ifdef DEBUG
+
+
+/* Poke a character directly onto the VGA text display,
+   as a very quick, mostly-reliable status indicator.
+   Assumes ss is a kernel data segment register.  */
+#define POKE_STATUS(char,scratch)		\
+	ss/*XXX gas bug */			;\
+	movl	%ss:_phys_mem_va,scratch	;\
+	addl	$0xb8000+80*2*13+40*2,scratch	;\
+	movb	char,%ss:(scratch)		;\
+	movb	$0xf0,%ss:1(scratch)
+
+
+#else !DEBUG
+
+#define POKE_STATUS(char,scratch)
+
+#endif !DEBUG
+#else !ASSEMBLER
+#ifdef DEBUG
+
+#include <mach/machine/vm_types.h>
+
+
+#define POKE_STATUS(string)						\
+	({	unsigned char *s = (string);				\
+		extern vm_offset_t phys_mem_va;				\
+		short *d = (short*)(phys_mem_va+0xb8000+80*2*13+40*2);	\
+		while (*s) { (*d++) = 0x3000 | (*s++); }		\
+		*d = ' ';						\
+	})
+
+
+#else !DEBUG
+
+#define POKE_STATUS(char)
+
+#endif !DEBUG
+#endif !ASSEMBLER
+
+
+#include_next "debug.h"
+
+#endif _KUKM_I386_PC_DEBUG_H_