Change the kernel dev_t, representing a pointer to a specinfo structure,
[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 $
b13267a5 38 * $DragonFly: src/sys/i386/include/Attic/cpu.h,v 1.17 2006/09/10 01:26:39 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 */
1bd40720 47#ifndef _MACHINE_PSL_H_
1f2de5d4 48#include "psl.h"
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49#endif
50#ifndef _MACHINE_FRAME_H_
1f2de5d4 51#include "frame.h"
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52#endif
53#ifndef _MACHINE_SEGMENTS_H_
1f2de5d4 54#include "segments.h"
1bd40720 55#endif
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56
57/*
58 * definitions of cpu-dependent requirements
59 * referenced in generic code
60 */
61#undef COPY_SIGCODE /* don't copy sigcode above user stack in exec */
62
63#define cpu_exec(p) /* nothing */
64#define cpu_swapin(p) /* nothing */
65#define cpu_setstack(p, ap) ((p)->p_md.md_regs[SP] = (ap))
66
67#define CLKF_USERMODE(framep) \
88c4d2f6 68 ((ISPL((framep)->if_cs) == SEL_UPL) || (framep->if_eflags & PSL_VM))
984263bc 69
03aa8d99 70#define CLKF_INTR(framep) (mycpu->gd_intr_nesting_level > 1 || (curthread->td_flags & TDF_INTTHREAD))
88c4d2f6 71#define CLKF_PC(framep) ((framep)->if_eip)
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72
73/*
74 * Preempt the current process if in interrupt from user mode,
75 * or after the current trap/syscall if in system mode.
76 *
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77 * We do not have to use a locked bus cycle but we do have to use an
78 * atomic instruction because an interrupt on the local cpu can modify
235957ed 79 * the gd_reqflags field.
984263bc 80 */
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81#define need_lwkt_resched() \
82 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_LWKT_RESCHED)
83#define need_user_resched() \
84 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_USER_RESCHED)
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85#define need_proftick() \
86 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_OWEUPC)
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87#define need_ipiq() \
88 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_IPIQ)
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89#define signotify() \
90 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_SIGNAL)
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91#define sigupcall() \
92 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_UPCALL)
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93#define clear_user_resched() \
94 atomic_clear_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_USER_RESCHED)
95#define clear_lwkt_resched() \
96 atomic_clear_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_LWKT_RESCHED)
97#define user_resched_wanted() \
98 (mycpu->gd_reqflags & RQF_AST_USER_RESCHED)
99#define lwkt_resched_wanted() \
100 (mycpu->gd_reqflags & RQF_AST_LWKT_RESCHED)
101#define any_resched_wanted() \
102 (mycpu->gd_reqflags & (RQF_AST_LWKT_RESCHED|RQF_AST_USER_RESCHED))
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103
104/*
105 * CTL_MACHDEP definitions.
106 */
b13267a5 107#define CPU_CONSDEV 1 /* cdev_t: console terminal device */
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108#define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */
109#define CPU_DISRTCSET 3 /* int: disable resettodr() call */
110#define CPU_BOOTINFO 4 /* struct: bootinfo */
111#define CPU_WALLCLOCK 5 /* int: indicates wall CMOS clock */
112#define CPU_MAXID 6 /* number of valid machdep ids */
113
114#define CTL_MACHDEP_NAMES { \
115 { 0, 0 }, \
116 { "console_device", CTLTYPE_STRUCT }, \
117 { "adjkerntz", CTLTYPE_INT }, \
118 { "disable_rtc_set", CTLTYPE_INT }, \
119 { "bootinfo", CTLTYPE_STRUCT }, \
120 { "wall_cmos_clock", CTLTYPE_INT }, \
121}
122
123#ifdef _KERNEL
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124
125struct proc;
126
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127extern char btext[];
128extern char etext[];
984263bc 129
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130void fork_trampoline (void);
131void fork_return (struct proc *, struct trapframe);
1bd40720 132
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133#endif
134
135#endif /* !_MACHINE_CPU_H_ */