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-rw-r--r--i386/util/gdt.h88
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diff --git a/i386/util/gdt.h b/i386/util/gdt.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 _I386_GDT_
-#define _I386_GDT_
-
-#include <mach/machine/seg.h>
-
-/*
- * Collect and define the GDT segment selectors.
- * xxx_IDX is the index number of the selector;
- * xxx is the actual selector value (index * 8).
- */
-enum gdt_idx
-{
- GDT_NULL_IDX = 0,
-
-#define gdt_sel(name) name##_IDX,
-#include "gdt_sels.h"
-#undef gdt_sel
-
- GDT_FIRST_FREE_IDX
-};
-
-enum gdt_sel
-{
- GDT_NULL = 0,
-
-#define gdt_sel(name) name = name##_IDX * 8,
-#include "gdt_sels.h"
-#undef gdt_sel
-};
-
-#define GDTSZ GDT_FIRST_FREE_IDX
-
-
-/* If we have a KERNEL_TSS, use that as our DEFAULT_TSS if none is defined yet.
- (The DEFAULT_TSS gets loaded by cpu_tables_load() upon switching to pmode.)
- Similarly with DEFAULT_LDT. */
-#if defined(ENABLE_KERNEL_TSS) && !defined(DEFAULT_TSS)
-#define DEFAULT_TSS KERNEL_TSS
-#define DEFAULT_TSS_IDX KERNEL_TSS_IDX
-#endif
-#if defined(ENABLE_KERNEL_LDT) && !defined(DEFAULT_LDT)
-#define DEFAULT_LDT KERNEL_LDT
-#define DEFAULT_LDT_IDX KERNEL_LDT_IDX
-#endif
-
-
-/* Fill a segment descriptor in a CPU's GDT. */
-#define fill_gdt_descriptor(cpu, segment, base, limit, access, sizebits) \
- fill_descriptor(&(cpu)->tables.gdt[segment/8], \
- base, limit, access, sizebits)
-
-#define i16_fill_gdt_descriptor(cpu, segment, base, limit, access, sizebits) \
- i16_fill_descriptor(&(cpu)->tables.gdt[segment/8], \
- base, limit, access, sizebits)
-
-
-/* This automatically defines GDT descriptor initialization functions. */
-#define gdt_desc_initializer(segment, base, limit, access, sizebits) \
- void cpu_gdt_init_##segment(struct cpu *cpu) \
- { \
- fill_gdt_descriptor(cpu, segment, base, limit, \
- access, sizebits); \
- }
-
-
-#endif _I386_GDT_