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/*
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* Copyright (c) 1991 IBM Corporation
* Copyright (c) 1994 The University of Utah and
* the Computer Systems Laboratory (CSL).
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation,
* and that the name IBM not be used in advertising or publicity
* pertaining to distribution of the software without specific, written
* prior permission.
*
* CARNEGIE MELLON, IBM, AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON, IBM, AND CSL DISCLAIM ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* This file describes the standard LDT provided by default
* to all user-level Mach tasks.
*/
#ifndef _I386_LDT_
#define _I386_LDT_
#include "seg.h"
/*
* User descriptors for Mach - 32-bit flat address space
*/
#define USER_SCALL 0x07 /* system call gate */
#ifdef __x86_64__
/* Call gate needs two entries */
#endif
#define USER_CS 0x17 /* user code segment */
#define USER_DS 0x1f /* user data segment */
#define LDTSZ 4
#ifndef __ASSEMBLER__
extern struct real_descriptor ldt[LDTSZ];
/* Fill a segment descriptor in the LDT. */
#define fill_ldt_descriptor(selector, base, limit, access, sizebits) \
fill_descriptor(&ldt[selector/8], base, limit, access, sizebits)
#define fill_ldt_gate(selector, offset, dest_selector, access, word_count) \
fill_gate((struct real_gate*)&ldt[selector/8], \
offset, dest_selector, access, word_count)
void ldt_init(void);
#endif /* !__ASSEMBLER__ */
#endif /* _I386_LDT_ */
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