[apple/xnu.git] / osfmk / i386 / tss.h

/*
 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
 * 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.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS 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.
 */
/*
 */

#ifndef	_I386_TSS_H_
#define	_I386_TSS_H_

#include <stdint.h>

/*
 *	i386 Task State Segment
 */
struct i386_tss {
	uint32_t	back_link;	/* segment number of previous task,
					   if nested */
	uint32_t	esp0;		/* initial stack pointer ... */
	uint32_t	ss0;		/* and segment for ring 0 */
	uint32_t	esp1;		/* initial stack pointer ... */
	uint32_t	ss1;		/* and segment for ring 1 */
	uint32_t	esp2;		/* initial stack pointer ... */
	uint32_t	ss2;		/* and segment for ring 2 */
	uint32_t	cr3;		/* CR3 - page table directory
						 physical address */
	uint32_t	eip;
	uint32_t	eflags;
	uint32_t	eax;
	uint32_t	ecx;
	uint32_t	edx;
	uint32_t	ebx;
	uint32_t	esp;		/* current stack pointer */
	uint32_t	ebp;
	uint32_t	esi;
	uint32_t	edi;
	uint32_t	es;
	uint32_t	cs;
	uint32_t	ss;		/* current stack segment */
	uint32_t	ds;
	uint32_t	fs;
	uint32_t	gs;
	uint32_t	ldt;		/* local descriptor table segment */
	uint16_t	trace_trap;	/* trap on switch to this task */
	uint16_t	io_bit_map_offset;
					/* offset to start of IO permission
					   bit map */
};

/*
 * Temporary stack used on kernel entry via the sysenter instruction.
 * Its top points on to the PCB save area. It must contain space for
 * a single interrupt stack frame in case of single-stepping over the sysenter.
 * Although this is defined as a 64-bit stack, the space is also used in
 * 32-bit legacy mode. For 64-bit the stack is 16-byte aligned.
 */

struct sysenter_stack {
	uint64_t	sysestack[64];	/* Space for a 64-bit frame and some */
	uint64_t	top;		/* Top and pointer to ISS in PCS */
};

#pragma pack(4)
struct x86_64_tss {
	uint32_t	reserved1;
	uint64_t	rsp0;		/* stack pointer for CPL0 */
	uint64_t	rsp1;		/* stack pointer for CPL1 */
	uint64_t	rsp2;		/* stack pointer for CPL2 */
	uint32_t	reserved2;
	uint32_t	reserved3;
	uint64_t	ist1;		/* interrupt stack table 1 */
	uint64_t	ist2;		/* interrupt stack table 2 */
	uint64_t	ist3;		/* interrupt stack table 3 */
	uint64_t	ist4;		/* interrupt stack table 4 */
	uint64_t	ist5;		/* interrupt stack table 5 */
	uint64_t	ist6;		/* interrupt stack table 6 */
	uint64_t	ist7;		/* interrupt stack table 7 */
	uint32_t	reserved4;
	uint32_t	reserved5;
	uint16_t	reserved6;
	uint16_t	io_bit_map_offset;
					/* offset to IO permission bit map */
};
#pragma pack()
#endif	/* _I386_TSS_H_ */
Commit	Line	Data
1c79356b	1	/*
2d21ac55	2	* Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
1c79356b	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
8f6c56a5	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/*
	29	* @OSF_COPYRIGHT@
	30	*/
	31	/*
	32	* Mach Operating System
	33	* Copyright (c) 1991,1990,1989 Carnegie Mellon University
	34	* All Rights Reserved.
	35	*
	36	* Permission to use, copy, modify and distribute this software and its
	37	* documentation is hereby granted, provided that both the copyright
	38	* notice and this permission notice appear in all copies of the
	39	* software, derivative works or modified versions, and any portions
	40	* thereof, and that both notices appear in supporting documentation.
	41	*
	42	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	43	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
	44	* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	45	*
	46	* Carnegie Mellon requests users of this software to return to
	47	*
	48	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	49	* School of Computer Science
	50	* Carnegie Mellon University
	51	* Pittsburgh PA 15213-3890
	52	*
	53	* any improvements or extensions that they make and grant Carnegie Mellon
	54	* the rights to redistribute these changes.
	55	*/
	56	/*
	57	*/
	58
	59	#ifndef _I386_TSS_H_
	60	#define _I386_TSS_H_
	61
0c530ab8 A	62	#include <stdint.h>
0c530ab8 A	63
1c79356b A	64	/*
	65	* i386 Task State Segment
	66	*/
	67	struct i386_tss {
0c530ab8	68	uint32_t back_link; /* segment number of previous task,
1c79356b	69	if nested */
0c530ab8 A	70	uint32_t esp0; /* initial stack pointer ... */
	71	uint32_t ss0; /* and segment for ring 0 */
	72	uint32_t esp1; /* initial stack pointer ... */
	73	uint32_t ss1; /* and segment for ring 1 */
	74	uint32_t esp2; /* initial stack pointer ... */
	75	uint32_t ss2; /* and segment for ring 2 */
	76	uint32_t cr3; /* CR3 - page table directory
1c79356b	77	physical address */
0c530ab8 A	78	uint32_t eip;
	79	uint32_t eflags;
	80	uint32_t eax;
	81	uint32_t ecx;
	82	uint32_t edx;
	83	uint32_t ebx;
	84	uint32_t esp; /* current stack pointer */
	85	uint32_t ebp;
	86	uint32_t esi;
	87	uint32_t edi;
	88	uint32_t es;
	89	uint32_t cs;
	90	uint32_t ss; /* current stack segment */
	91	uint32_t ds;
	92	uint32_t fs;
	93	uint32_t gs;
	94	uint32_t ldt; /* local descriptor table segment */
	95	uint16_t trace_trap; /* trap on switch to this task */
	96	uint16_t io_bit_map_offset;
1c79356b A	97	/* offset to start of IO permission
	98	bit map */
	99	};
	100
0c530ab8 A	101	/*
	102	* Temporary stack used on kernel entry via the sysenter instruction.
	103	* Its top points on to the PCB save area. It must contain space for
	104	* a single interrupt stack frame in case of single-stepping over the sysenter.
	105	* Although this is defined as a 64-bit stack, the space is also used in
	106	* 32-bit legacy mode. For 64-bit the stack is 16-byte aligned.
	107	*/
5c9f4661	108
0c530ab8	109	struct sysenter_stack {
5c9f4661	110	uint64_t sysestack[64]; /* Space for a 64-bit frame and some */
0c530ab8 A	111	uint64_t top; /* Top and pointer to ISS in PCS */
	112	};
	113
b0d623f7	114	#pragma pack(4)
0c530ab8 A	115	struct x86_64_tss {
	116	uint32_t reserved1;
	117	uint64_t rsp0; /* stack pointer for CPL0 */
	118	uint64_t rsp1; /* stack pointer for CPL1 */
	119	uint64_t rsp2; /* stack pointer for CPL2 */
	120	uint32_t reserved2;
	121	uint32_t reserved3;
	122	uint64_t ist1; /* interrupt stack table 1 */
	123	uint64_t ist2; /* interrupt stack table 2 */
	124	uint64_t ist3; /* interrupt stack table 3 */
	125	uint64_t ist4; /* interrupt stack table 4 */
	126	uint64_t ist5; /* interrupt stack table 5 */
	127	uint64_t ist6; /* interrupt stack table 6 */
	128	uint64_t ist7; /* interrupt stack table 7 */
	129	uint32_t reserved4;
	130	uint32_t reserved5;
	131	uint16_t reserved6;
	132	uint16_t io_bit_map_offset;
	133	/* offset to IO permission bit map */
	134	};
b0d623f7	135	#pragma pack()
1c79356b	136	#endif /* _I386_TSS_H_ */