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 1.25 2007/03/01 01:46:52 corecode Exp $
45 * Definitions unique to i386 cpu support.
48 #include <machine/psl.h>
51 #include <machine/frame.h>
53 #ifndef _CPU_SEGMENTS_H_
54 #include <machine/segments.h>
58 * definitions of cpu-dependent requirements
59 * referenced in generic code
62 #define cpu_exec(p) /* nothing */
63 #define cpu_swapin(p) /* nothing */
64 #define cpu_setstack(lp, ap) ((lp)->lwp_md.md_regs[SP] = (ap))
66 #define CLKF_INTR(intr_nest) ((intr_nest) > 1 || (curthread->td_flags & TDF_INTTHREAD))
67 #define CLKF_PC(framep) ((framep)->if_eip)
70 * Preempt the current process if in interrupt from user mode,
71 * or after the current trap/syscall if in system mode.
73 * We now have to use a locked bus cycle due to LWKT_RESCHED/WAKEUP
74 * signalling by other cpus.
76 #define need_lwkt_resched() \
77 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_LWKT_RESCHED)
78 #define need_user_resched() \
79 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_USER_RESCHED)
80 #define need_proftick() \
81 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_OWEUPC)
83 atomic_set_int(&mycpu->gd_reqflags, RQF_IPIQ)
85 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_SIGNAL)
87 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_UPCALL)
88 #define clear_user_resched() \
89 atomic_clear_int(&mycpu->gd_reqflags, RQF_AST_USER_RESCHED)
90 #define clear_lwkt_resched() \
91 atomic_clear_int(&mycpu->gd_reqflags, RQF_AST_LWKT_RESCHED)
92 #define user_resched_wanted() \
93 (mycpu->gd_reqflags & RQF_AST_USER_RESCHED)
94 #define lwkt_resched_wanted() \
95 (mycpu->gd_reqflags & RQF_AST_LWKT_RESCHED)
96 #define any_resched_wanted() \
97 (mycpu->gd_reqflags & (RQF_AST_LWKT_RESCHED|RQF_AST_USER_RESCHED))
100 * CTL_MACHDEP definitions.
102 #define CPU_CONSDEV 1 /* cdev_t: console terminal device */
103 #define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */
104 #define CPU_DISRTCSET 3 /* int: disable resettodr() call */
105 #define CPU_BOOTINFO 4 /* struct: bootinfo */
106 #define CPU_WALLCLOCK 5 /* int: indicates wall CMOS clock */
107 #define CPU_MAXID 6 /* number of valid machdep ids */
109 #define CTL_MACHDEP_NAMES { \
111 { "console_device", CTLTYPE_STRUCT }, \
112 { "adjkerntz", CTLTYPE_INT }, \
113 { "disable_rtc_set", CTLTYPE_INT }, \
114 { "bootinfo", CTLTYPE_STRUCT }, \
115 { "wall_cmos_clock", CTLTYPE_INT }, \
125 void fork_trampoline (void);
126 void generic_lwp_return (struct lwp *, struct trapframe *);
127 void fork_return (struct lwp *, struct trapframe *);
131 #endif /* !_CPU_CPU_H_ */