sys/cpu/amd64/include/cpu.h

   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 $
  38  * $DragonFly: src/sys/cpu/amd64/include/cpu.h,v 1.2 2007/09/23 04:29:30 yanyh Exp $
  39  */
  40
  41 #ifndef _CPU_CPU_H_
  42 #define _CPU_CPU_H_
  43
  44 #define CLKF_INTR(framep)       (mycpu->gd_intr_nesting_level > 1 || (curthread->td_flags & TDF_INTTHREAD))
  45 #define CLKF_PC(framep)         ((framep)->if_rip)
  46
  47 /*
  48  * Preempt the current process if in interrupt from user mode,
  49  * or after the current trap/syscall if in system mode.
  50  *
  51  * We do not have to use a locked bus cycle but we do have to use an
  52  * atomic instruction because an interrupt on the local cpu can modify
  53  * the gd_reqflags field.
  54  */
  55 #define need_lwkt_resched()     \
  56         atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_LWKT_RESCHED)
  57 #define need_user_resched()     \
  58         atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_USER_RESCHED)
  59 #define need_proftick()         \
  60         atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_OWEUPC)
  61 #define signotify()     \
  62         atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_SIGNAL)
  63 #define sigupcall()             \
  64         atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_UPCALL)
  65 #define clear_lwkt_resched()    \
  66         atomic_clear_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_LWKT_RESCHED)
  67 #define clear_user_resched()    \
  68         atomic_clear_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_USER_RESCHED)
  69 #define user_resched_wanted()   \
  70         (mycpu->gd_reqflags & RQF_AST_USER_RESCHED)
  71 #define lwkt_resched_wanted()   \
  72         (mycpu->gd_reqflags & RQF_AST_LWKT_RESCHED)
  73
  74 /*
  75  * CTL_MACHDEP definitions.
  76  */
  77 #define CPU_CONSDEV             1       /* cdev_t: console terminal device */
  78 #define CPU_ADJKERNTZ           2       /* int: timezone offset (seconds) */
  79 #define CPU_DISRTCSET           3       /* int: disable resettodr() call */
  80 #define CPU_BOOTINFO            4       /* struct: bootinfo */
  81 #define CPU_WALLCLOCK           5       /* int: indicates wall CMOS clock */
  82 #define CPU_MAXID               6       /* number of valid machdep ids */
  83
  84 #define CTL_MACHDEP_NAMES { \
  85         { 0, 0 }, \
  86         { "console_device", CTLTYPE_STRUCT }, \
  87         { "adjkerntz", CTLTYPE_INT }, \
  88         { "disable_rtc_set", CTLTYPE_INT }, \
  89         { "bootinfo", CTLTYPE_STRUCT }, \
  90         { "wall_cmos_clock", CTLTYPE_INT }, \
  91 }
  92
  93 #ifdef _KERNEL
  94 struct lwp;
  95 void    fork_trampoline (void);
  96 void    generic_lwp_return (struct lwp *, struct trapframe *);
  97 void    fork_return (struct lwp *, struct trapframe *);
  98 #endif
  99
 100 #endif /* !_CPU_CPU_H_ */