2 * Copyright (c) 1990 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
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 $
38 * $DragonFly: src/sys/cpu/i386/include/cpu.h,v 1.19 2006/10/23 21:50:31 dillon Exp $
41 #ifndef _MACHINE_CPU_H_
42 #define _MACHINE_CPU_H_
45 * Definitions unique to i386 cpu support.
47 #ifndef _MACHINE_PSL_H_
48 #include <machine/psl.h>
50 #ifndef _MACHINE_FRAME_H_
51 #include <machine/frame.h>
53 #ifndef _MACHINE_SEGMENTS_H_
54 #include <machine/segments.h>
58 * definitions of cpu-dependent requirements
59 * referenced in generic code
61 #undef COPY_SIGCODE /* don't copy sigcode above user stack in exec */
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))
67 #define CLKF_USERMODE(framep) \
68 ((ISPL((framep)->if_cs) == SEL_UPL) || (framep->if_eflags & PSL_VM))
70 #define CLKF_INTR(framep) (mycpu->gd_intr_nesting_level > 1 || (curthread->td_flags & TDF_INTTHREAD))
71 #define CLKF_PC(framep) ((framep)->if_eip)
74 * Preempt the current process if in interrupt from user mode,
75 * or after the current trap/syscall if in system mode.
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
79 * the gd_reqflags field.
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)
85 #define need_proftick() \
86 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_OWEUPC)
88 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_IPIQ)
90 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_SIGNAL)
92 atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_UPCALL)
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))
105 * CTL_MACHDEP definitions.
107 #define CPU_CONSDEV 1 /* cdev_t: console terminal device */
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 */
114 #define CTL_MACHDEP_NAMES { \
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 }, \
130 void fork_trampoline (void);
131 void fork_return (struct lwp *, struct trapframe);
135 #endif /* !_MACHINE_CPU_H_ */