1 /*-
2 * Copyright (c) 1991 Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * from: @(#)proc.h 7.1 (Berkeley) 5/15/91
30 * $FreeBSD: releng/8.0/sys/i386/include/proc.h 182961 2008-09-12 09:53:29Z kib $
31 */
32
33 #ifndef _MACHINE_PROC_H_
34 #define _MACHINE_PROC_H_
35
36 #include <machine/segments.h>
37
38 struct proc_ldt {
39 caddr_t ldt_base;
40 int ldt_len;
41 int ldt_refcnt;
42 u_long ldt_active;
43 struct segment_descriptor ldt_sd;
44 };
45
46 /*
47 * Machine-dependent part of the proc structure for i386.
48 * Table of MD locks:
49 * t - Descriptor tables lock
50 */
51 struct mdthread {
52 int md_spinlock_count; /* (k) */
53 register_t md_saved_flags; /* (k) */
54 };
55
56 struct mdproc {
57 struct proc_ldt *md_ldt; /* (t) per-process ldt */
58 };
59
60 #ifdef _KERNEL
61
62 /* Get the current kernel thread stack usage. */
63 #define GET_STACK_USAGE(total, used) do { \
64 struct thread *td = curthread; \
65 (total) = td->td_kstack_pages * PAGE_SIZE; \
66 (used) = (char *)td->td_kstack + \
67 td->td_kstack_pages * PAGE_SIZE - \
68 (char *)&td; \
69 } while (0)
70
71 void set_user_ldt(struct mdproc *);
72 struct proc_ldt *user_ldt_alloc(struct mdproc *, int);
73 void user_ldt_free(struct thread *);
74 void user_ldt_deref(struct proc_ldt *pldt);
75
76 extern struct mtx dt_lock;
77
78 #endif /* _KERNEL */
79
80 #endif /* !_MACHINE_PROC_H_ */
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