xref: /freebsd/sys/i386/include/pcb.h (revision 1c05a6ea6b849ff95e539c31adea887c644a6a01)
1 /*-
2  * Copyright (c) 1990 The Regents of the University of California.
3  * All rights reserved.
4  *
5  * This code is derived from software contributed to Berkeley by
6  * William Jolitz.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. Neither the name of the University nor the names of its contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  *
32  *	from: @(#)pcb.h	5.10 (Berkeley) 5/12/91
33  * $FreeBSD$
34  */
35 
36 #ifndef _I386_PCB_H_
37 #define _I386_PCB_H_
38 
39 /*
40  * Intel 386 process control block
41  */
42 #ifndef _KERNEL
43 #include <machine/segments.h>
44 #endif
45 #include <machine/npx.h>
46 
47 /*
48  * NB: The fields marked with (*) are used by kernel debuggers.  Their
49  * ABI should be preserved.
50  */
51 struct pcb {
52 	int	pcb_edi;	/* (*) */
53 	int	pcb_esi;	/* (*) */
54 	int	pcb_ebp;	/* (*) */
55 	int	pcb_esp;	/* (*) */
56 	int	pcb_ebx;	/* (*) */
57 	int	pcb_eip;	/* (*) */
58 	struct segment_descriptor pcb_fsd;
59 	struct segment_descriptor pcb_gsd;
60 	int	pcb_ds;
61 	int	pcb_es;
62 	int	pcb_fs;
63 	int	pcb_gs;
64 	int	pcb_ss;
65 	int	pcb_cr0;
66 	int	pcb_cr2;
67 	int	pcb_cr3;
68 	int	pcb_cr4;
69 	int     pcb_dr0;
70 	int     pcb_dr1;
71 	int     pcb_dr2;
72 	int     pcb_dr3;
73 	int     pcb_dr6;
74 	int     pcb_dr7;
75 
76 	struct region_descriptor pcb_gdt;
77 	struct region_descriptor pcb_idt;
78 	uint16_t	pcb_ldt;
79 	uint16_t	pcb_tr;
80 
81 	u_int	pcb_flags;
82 #define	PCB_DBREGS	0x02	/* process using debug registers */
83 #define	PCB_NPXINITDONE	0x08	/* fpu state is initialized */
84 #define	PCB_VM86CALL	0x10	/* in vm86 call */
85 #define	PCB_NPXUSERINITDONE 0x20 /* user fpu state is initialized */
86 #define	PCB_KERNNPX	0x40	/* kernel uses npx */
87 
88 	uint16_t pcb_initial_npxcw;
89 
90 	caddr_t	pcb_onfault;	/* copyin/out fault recovery */
91 	struct	pcb_ext	*pcb_ext;	/* optional pcb extension */
92 	int	pcb_waspsl;	/* unused padding for ABI and API compat */
93 	u_long	pcb_vm86[2];	/* vm86bios scratch space */
94 	union	savefpu *pcb_save;
95 
96 	uint32_t pcb_pad[10];
97 };
98 
99 /* Per-CPU state saved during suspend and resume. */
100 struct susppcb {
101 	struct pcb	sp_pcb;
102 
103 	/* fpu context for suspend/resume */
104 	void		*sp_fpususpend;
105 };
106 
107 #ifdef _KERNEL
108 struct trapframe;
109 
110 void	makectx(struct trapframe *, struct pcb *);
111 int	savectx(struct pcb *) __returns_twice;
112 void	resumectx(struct pcb *) __fastcall;
113 #endif
114 
115 #endif /* _I386_PCB_H_ */
116