Initial source

7 files changed, 313 insertions, 0 deletions

diff --git a/i386/util/i16/debug.h b/i386/util/i16/debug.h
new file mode 100644
index 0000000..6bce9d2
--- /dev/null
+++ b/i386/util/i16/debug.h
@@ -0,0 +1,42 @@
+/* 
+ * Copyright (c) 1995 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 _UTIL_I386_I16_DEBUG_H_
+#define _UTIL_I386_I16_DEBUG_H_
+
+#include_next "debug.h"
+
+#ifdef DEBUG
+
+#define i16_assert(v)							\
+	MACRO_BEGIN							\
+		if (!(v))						\
+			i16_die(__FILE__":?: failed assertion `"#v"'");	\
+	MACRO_END
+
+#else /* !DEBUG */
+
+#define i16_assert(v) (0)
+
+#endif /* !DEBUG */
+
+#endif /* _UTIL_I386_I16_DEBUG_H_ */
diff --git a/i386/util/i16/i16.h b/i386/util/i16/i16.h
new file mode 100644
index 0000000..0eae59a
--- /dev/null
+++ b/i386/util/i16/i16.h
@@ -0,0 +1,58 @@
+/* 
+ * 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 _I386_I16_
+#define _I386_I16_
+
+#include <mach/machine/code16.h>
+
+#include "gdt.h"
+
+
+/* Macros to switch between 16-bit and 32-bit code
+   in the middle of a C function.
+   Be careful with these!  */
+#define i16_switch_to_32bit() asm volatile("
+		ljmp	%0,$1f
+		.code32
+	1:
+	" : : "i" (KERNEL_CS));
+#define switch_to_16bit() asm volatile("
+		ljmp	%0,$1f
+		.code16
+	1:
+	" : : "i" (KERNEL_16_CS));
+
+
+/* From within one type of code, execute 'stmt' in the other.
+   These are safer and harder to screw up with than the above macros.  */
+#define i16_do_32bit(stmt) \
+	({	i16_switch_to_32bit(); \
+		{ stmt; } \
+		switch_to_16bit(); })
+#define do_16bit(stmt) \
+	({	switch_to_16bit(); \
+		{ stmt; } \
+		i16_switch_to_32bit(); })
+
+
+#endif _I386_I16_
diff --git a/i386/util/i16/i16_die.c b/i386/util/i16/i16_die.c
new file mode 100644
index 0000000..e3cd533
--- /dev/null
+++ b/i386/util/i16/i16_die.c
@@ -0,0 +1,34 @@
+/* 
+ * 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
+ */
+
+#include <mach/machine/code16.h>
+
+CODE16
+
+void i16_die(char *mes)
+{
+	if (mes)
+		i16_puts(mes);
+
+	i16_exit(mes != 0);
+}
diff --git a/i386/util/i16/i16_gdt_init_temp.c b/i386/util/i16/i16_gdt_init_temp.c
new file mode 100644
index 0000000..14f2d0e
--- /dev/null
+++ b/i386/util/i16/i16_gdt_init_temp.c
@@ -0,0 +1,53 @@
+/* 
+ * 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
+ */
+
+#include <mach/machine/code16.h>
+#include <mach/machine/seg.h>
+
+#include "vm_param.h"
+#include "cpu.h"
+
+
+CODE16
+
+/* This 16-bit function initializes CPU 0's GDT
+   just enough to get in and out of protected (and possibly paged) mode,
+   with all addresses assuming identity-mapped memory.  */
+void i16_gdt_init_temp()
+{
+	/* Create temporary kernel code and data segment descriptors.
+	   (They'll be reinitialized later after paging is enabled.)  */
+	i16_fill_gdt_descriptor(&cpu[0], KERNEL_CS,
+				boot_image_pa, 0xffffffff,
+				ACC_PL_K|ACC_CODE_R, SZ_32);
+	i16_fill_gdt_descriptor(&cpu[0], KERNEL_DS,
+				boot_image_pa, 0xffffffff,
+				ACC_PL_K|ACC_DATA_W, SZ_32);
+	i16_fill_gdt_descriptor(&cpu[0], KERNEL_16_CS,
+				boot_image_pa, 0xffff,
+				ACC_PL_K|ACC_CODE_R, SZ_16);
+	i16_fill_gdt_descriptor(&cpu[0], KERNEL_16_DS,
+				boot_image_pa, 0xffff,
+				ACC_PL_K|ACC_DATA_W, SZ_16);
+}
+
diff --git a/i386/util/i16/i16_nanodelay.c b/i386/util/i16/i16_nanodelay.c
new file mode 100644
index 0000000..7b23cb5
--- /dev/null
+++ b/i386/util/i16/i16_nanodelay.c
@@ -0,0 +1,35 @@
+/* 
+ * 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
+ */
+
+#include <mach/machine/code16.h>
+
+CODE16
+
+/* XXX */
+void i16_nanodelay(int ns)
+{
+	asm("jmp 1f; 1:");
+	asm("jmp 1f; 1:");
+	asm("jmp 1f; 1:");
+}
+
diff --git a/i386/util/i16/i16_puts.c b/i386/util/i16/i16_puts.c
new file mode 100644
index 0000000..c43a3e1
--- /dev/null
+++ b/i386/util/i16/i16_puts.c
@@ -0,0 +1,34 @@
+/* 
+ * 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
+ */
+
+#include <mach/machine/code16.h>
+
+CODE16
+
+void i16_puts(const char *mes)
+{
+	while (*mes)
+		i16_putchar(*mes++);
+	i16_putchar('\n');
+}
+
diff --git a/i386/util/i16/i16_writehex.c b/i386/util/i16/i16_writehex.c
new file mode 100644
index 0000000..4a1b2af
--- /dev/null
+++ b/i386/util/i16/i16_writehex.c
@@ -0,0 +1,57 @@
+/* 
+ * 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
+ */
+
+#include <mach/machine/code16.h>
+
+CODE16
+
+void i16_writehexdigit(unsigned char digit)
+{
+	digit &= 0xf;
+	i16_putchar(digit < 10 ? digit+'0' : digit-10+'A');
+}
+
+void i16_writehexb(unsigned char val)
+{
+	i16_writehexdigit(val >> 4);
+	i16_writehexdigit(val);
+}
+
+void i16_writehexw(unsigned short val)
+{
+	i16_writehexb(val >> 8);
+	i16_writehexb(val);
+}
+
+void i16_writehexl(unsigned long val)
+{
+	i16_writehexw(val >> 16);
+	i16_writehexw(val);
+}
+
+void i16_writehexll(unsigned long long val)
+{
+	i16_writehexl(val >> 32);
+	i16_writehexl(val);
+}
+