Initial source

1 files changed, 98 insertions, 0 deletions

diff --git a/i386/pc/i16/i16_bios.h b/i386/pc/i16/i16_bios.h
new file mode 100644
index 0000000..29dc2d8
--- /dev/null
+++ b/i386/pc/i16/i16_bios.h
@@ -0,0 +1,98 @@
+/* 
+ * 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 _I16_BIOS_H_
+#define _I16_BIOS_H_
+
+#include <mach/inline.h>
+
+
+MACH_INLINE void i16_bios_putchar(int c)
+{
+	asm volatile("int $0x10" : : "a" (0x0e00 | (c & 0xff)), "b" (0x07));
+}
+
+MACH_INLINE int i16_bios_getchar()
+{
+	int c;
+	asm volatile("int $0x16" : "=a" (c) : "a" (0x0000));
+	c &= 0xff;
+	return c;
+}
+
+MACH_INLINE void i16_bios_warm_boot(void)
+{
+	asm volatile("
+		cli
+		movw	$0x40,%ax
+		movw	%ax,%ds
+		movw	$0x1234,0x72
+		ljmp	$0xffff,$0x0000
+	");
+}
+
+MACH_INLINE void i16_bios_cold_boot(void)
+{
+	asm volatile("
+		cli
+		movw	$0x40,%ax
+		movw	%ax,%ds
+		movw	$0x0000,0x72
+		ljmp	$0xffff,$0x0000
+	");
+}
+
+MACH_INLINE unsigned char i16_bios_copy_ext_mem(
+	unsigned src_la, unsigned dest_la, unsigned short word_count)
+{
+	char buf[48];
+	unsigned short i, rc;
+
+	/* Initialize the descriptor structure.  */
+	for (i = 0; i < sizeof(buf); i++)
+		buf[i] = 0;
+	*((unsigned short*)(buf+0x10)) = 0xffff; /* source limit */
+	*((unsigned long*)(buf+0x12)) = src_la; /* source linear address */
+	*((unsigned char*)(buf+0x15)) = 0x93; /* source access rights */
+	*((unsigned short*)(buf+0x18)) = 0xffff; /* dest limit */
+	*((unsigned long*)(buf+0x1a)) = dest_la; /* dest linear address */
+	*((unsigned char*)(buf+0x1d)) = 0x93; /* dest access rights */
+
+#if 0
+	i16_puts("buf:");
+	for (i = 0; i < sizeof(buf); i++)
+		i16_writehexb(buf[i]);
+	i16_puts("");
+#endif
+
+	/* Make the BIOS call to perform the copy.  */
+	asm volatile("
+		int	$0x15
+	" : "=a" (rc)
+	  : "a" ((unsigned short)0x8700),
+	    "c" (word_count),
+	    "S" ((unsigned short)(unsigned)buf));
+
+	return rc >> 8;
+}
+
+#endif _I16_BIOS_H_