FreeBSD/Linux Kernel Cross Reference
sys/i386/include/pcb.h
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * from: @(#)pcb.h 5.10 (Berkeley) 5/12/91
35 * $FreeBSD$
36 */
37
38 #ifndef _I386_PCB_H_
39 #define _I386_PCB_H_
40
41 /*
42 * Intel 386 process control block
43 */
44 #ifndef _KERNEL
45 #include <machine/segments.h>
46 #endif
47 #include <machine/npx.h>
48
49 /*
50 * NB: The fields marked with (*) are used by kernel debuggers. Their
51 * ABI should be preserved.
52 */
53 struct pcb {
54 int pcb_edi; /* (*) */
55 int pcb_esi; /* (*) */
56 int pcb_ebp; /* (*) */
57 int pcb_esp; /* (*) */
58 int pcb_ebx; /* (*) */
59 int pcb_eip; /* (*) */
60 struct segment_descriptor pcb_fsd;
61 struct segment_descriptor pcb_gsd;
62 int pcb_ds;
63 int pcb_es;
64 int pcb_fs;
65 int pcb_gs;
66 int pcb_ss;
67 int pcb_cr0;
68 int pcb_cr2;
69 int pcb_cr3;
70 int pcb_cr4;
71 int pcb_dr0;
72 int pcb_dr1;
73 int pcb_dr2;
74 int pcb_dr3;
75 int pcb_dr6;
76 int pcb_dr7;
77
78 struct region_descriptor pcb_gdt;
79 struct region_descriptor pcb_idt;
80 uint16_t pcb_ldt;
81 uint16_t pcb_tr;
82
83 u_int pcb_flags;
84 #define PCB_DBREGS 0x02 /* process using debug registers */
85 #define PCB_KERNNPX_THR 0x04 /* fpu_kern_thread() */
86 #define PCB_NPXINITDONE 0x08 /* fpu state is initialized */
87 #define PCB_VM86CALL 0x10 /* in vm86 call */
88 #define PCB_NPXUSERINITDONE 0x20 /* user fpu state is initialized */
89 #define PCB_KERNNPX 0x40 /* kernel uses npx */
90 #define PCB_NPXNOSAVE 0x80 /* no save area for current FPU ctx */
91
92 uint16_t pcb_initial_npxcw;
93
94 caddr_t pcb_onfault; /* copyin/out fault recovery */
95 struct pcb_ext *pcb_ext; /* optional pcb extension */
96 int pcb_waspsl; /* unused padding for ABI and API compat */
97 u_long pcb_vm86[2]; /* vm86bios scratch space */
98 union savefpu *pcb_save;
99
100 uint32_t pcb_pad[10];
101 };
102
103 /* Per-CPU state saved during suspend and resume. */
104 struct susppcb {
105 struct pcb sp_pcb;
106
107 /* fpu context for suspend/resume */
108 void *sp_fpususpend;
109 };
110
111 #ifdef _KERNEL
112 struct trapframe;
113
114 void makectx(struct trapframe *, struct pcb *);
115 int savectx(struct pcb *) __returns_twice;
116 void resumectx(struct pcb *) __fastcall;
117 #endif
118
119 #endif /* _I386_PCB_H_ */
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