Add SI_SUB_LOCK as sysinit priority for the initialisation of tokens and
[dragonfly.git] / sys / i386 / include / cpu.h
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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. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)cpu.h 5.4 (Berkeley) 5/9/91
37 * $FreeBSD: src/sys/i386/include/cpu.h,v 1.43.2.2 2001/06/15 09:37:57 scottl Exp $
0f7a3396 38 * $DragonFly: src/sys/i386/include/Attic/cpu.h,v 1.14 2004/02/17 19:38:53 dillon Exp $
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39 */
40
41#ifndef _MACHINE_CPU_H_
42#define _MACHINE_CPU_H_
43
44/*
45 * Definitions unique to i386 cpu support.
46 */
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47#include "psl.h"
48#include "frame.h"
49#include "segments.h"
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50
51/*
52 * definitions of cpu-dependent requirements
53 * referenced in generic code
54 */
55#undef COPY_SIGCODE /* don't copy sigcode above user stack in exec */
56
57#define cpu_exec(p) /* nothing */
58#define cpu_swapin(p) /* nothing */
59#define cpu_setstack(p, ap) ((p)->p_md.md_regs[SP] = (ap))
60
61#define CLKF_USERMODE(framep) \
88c4d2f6 62 ((ISPL((framep)->if_cs) == SEL_UPL) || (framep->if_eflags & PSL_VM))
984263bc 63
03aa8d99 64#define CLKF_INTR(framep) (mycpu->gd_intr_nesting_level > 1 || (curthread->td_flags & TDF_INTTHREAD))
88c4d2f6 65#define CLKF_PC(framep) ((framep)->if_eip)
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66
67/*
68 * Preempt the current process if in interrupt from user mode,
69 * or after the current trap/syscall if in system mode.
70 *
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71 * We do not have to use a locked bus cycle but we do have to use an
72 * atomic instruction because an interrupt on the local cpu can modify
235957ed 73 * the gd_reqflags field.
984263bc 74 */
a2a5ad0d 75#define need_resched() \
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76 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_RESCHED)
77#define need_proftick() \
78 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_OWEUPC)
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79#define need_ipiq() \
80 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_IPIQ)
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81#define signotify() \
82 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_SIGNAL)
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83#define sigupcall() \
84 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_UPCALL)
a2a5ad0d 85#define clear_resched() \
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86 atomic_clear_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_RESCHED)
87#define resched_wanted() \
88 (mycpu->gd_reqflags & RQF_AST_RESCHED)
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89
90/*
91 * CTL_MACHDEP definitions.
92 */
93#define CPU_CONSDEV 1 /* dev_t: console terminal device */
94#define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */
95#define CPU_DISRTCSET 3 /* int: disable resettodr() call */
96#define CPU_BOOTINFO 4 /* struct: bootinfo */
97#define CPU_WALLCLOCK 5 /* int: indicates wall CMOS clock */
98#define CPU_MAXID 6 /* number of valid machdep ids */
99
100#define CTL_MACHDEP_NAMES { \
101 { 0, 0 }, \
102 { "console_device", CTLTYPE_STRUCT }, \
103 { "adjkerntz", CTLTYPE_INT }, \
104 { "disable_rtc_set", CTLTYPE_INT }, \
105 { "bootinfo", CTLTYPE_STRUCT }, \
106 { "wall_cmos_clock", CTLTYPE_INT }, \
107}
108
109#ifdef _KERNEL
110extern char btext[];
111extern char etext[];
984263bc 112
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113void fork_trampoline (void);
114void fork_return (struct proc *, struct trapframe);
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115#endif
116
117#endif /* !_MACHINE_CPU_H_ */