sys/cpu/i386/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/i386/include/cpu.h,v 1.25 2007/03/01 01:46:52 corecode Exp $
  39  */
  40
  41 #ifndef _CPU_CPU_H_
  42 #define _CPU_CPU_H_
  43
  44 /*
  45  * Definitions unique to i386 cpu support.
  46  */
  47 #ifndef _CPU_PSL_H_
  48 #include <machine/psl.h>
  49 #endif
  50 #ifndef _CPU_FRAME_H_
  51 #include <machine/frame.h>
  52 #endif
  53 #ifndef _CPU_SEGMENTS_H_
  54 #include <machine/segments.h>
  55 #endif
  56
  57 /*
  58  * definitions of cpu-dependent requirements
  59  * referenced in generic code
  60  */
  61
  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))
  65
  66 #define CLKF_INTR(framep)       (mycpu->gd_intr_nesting_level > 1 || (curthread->td_flags & TDF_INTTHREAD))
  67 #define CLKF_PC(framep)         ((framep)->if_eip)
  68
  69 /*
  70  * Preempt the current process if in interrupt from user mode,
  71  * or after the current trap/syscall if in system mode.
  72  *
  73  * We do not have to use a locked bus cycle but we do have to use an
  74  * atomic instruction because an interrupt on the local cpu can modify
  75  * the gd_reqflags field.
  76  */
  77 #define need_lwkt_resched()     \
  78     atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_LWKT_RESCHED)
  79 #define need_user_resched()     \
  80     atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_USER_RESCHED)
  81 #define need_proftick()         \
  82     atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_OWEUPC)
  83 #define need_ipiq()             \
  84     atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_IPIQ)
  85 #define signotify()             \
  86     atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_SIGNAL)
  87 #define sigupcall()             \
  88     atomic_set_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_UPCALL)
  89 #define clear_user_resched()    \
  90     atomic_clear_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_USER_RESCHED)
  91 #define clear_lwkt_resched()    \
  92     atomic_clear_int_nonlocked(&mycpu->gd_reqflags, RQF_AST_LWKT_RESCHED)
  93 #define user_resched_wanted()   \
  94     (mycpu->gd_reqflags & RQF_AST_USER_RESCHED)
  95 #define lwkt_resched_wanted()   \
  96     (mycpu->gd_reqflags & RQF_AST_LWKT_RESCHED)
  97 #define any_resched_wanted()    \
  98     (mycpu->gd_reqflags & (RQF_AST_LWKT_RESCHED|RQF_AST_USER_RESCHED))
  99
 100 /*
 101  * CTL_MACHDEP definitions.
 102  */
 103 #define CPU_CONSDEV             1       /* cdev_t: console terminal device */
 104 #define CPU_ADJKERNTZ           2       /* int: timezone offset (seconds) */
 105 #define CPU_DISRTCSET           3       /* int: disable resettodr() call */
 106 #define CPU_BOOTINFO            4       /* struct: bootinfo */
 107 #define CPU_WALLCLOCK           5       /* int: indicates wall CMOS clock */
 108 #define CPU_MAXID               6       /* number of valid machdep ids */
 109
 110 #define CTL_MACHDEP_NAMES { \
 111         { 0, 0 }, \
 112         { "console_device", CTLTYPE_STRUCT }, \
 113         { "adjkerntz", CTLTYPE_INT }, \
 114         { "disable_rtc_set", CTLTYPE_INT }, \
 115         { "bootinfo", CTLTYPE_STRUCT }, \
 116         { "wall_cmos_clock", CTLTYPE_INT }, \
 117 }
 118
 119 #ifdef _KERNEL
 120
 121 struct lwp;
 122
 123 extern char     btext[];
 124 extern char     etext[];
 125
 126 void    fork_trampoline (void);
 127 void    generic_lwp_return (struct lwp *, struct trapframe *);
 128 void    fork_return (struct lwp *, struct trapframe *);
 129
 130 #endif
 131
 132 #endif /* !_CPU_CPU_H_ */