sys/arch/i386/include/cpu.h

   1 /*      $NetBSD: cpu.h,v 1.178 2011/12/30 17:57:49 cherry Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1990 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * William Jolitz.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)cpu.h       5.4 (Berkeley) 5/9/91
  35  */
  36
  37 #ifndef _I386_CPU_H_
  38 #define _I386_CPU_H_
  39
  40 #include <x86/cpu.h>
  41
  42 #ifdef _KERNEL
  43
  44 #if defined(__GNUC__) && !defined(_MODULE)
  45 static struct cpu_info *x86_curcpu(void);
  46 static lwp_t *x86_curlwp(void);
  47
  48 __inline static struct cpu_info * __unused
  49 x86_curcpu(void)
  50 {
  51         struct cpu_info *ci;
  52
  53         __asm volatile("movl %%fs:%1, %0" :
  54             "=r" (ci) :
  55             "m"
  56             (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_self)));
  57         return ci;
  58 }
  59
  60 __inline static lwp_t * __attribute__ ((const))
  61 x86_curlwp(void)
  62 {
  63         lwp_t *l;
  64
  65         __asm volatile("movl %%fs:%1, %0" :
  66             "=r" (l) :
  67             "m"
  68             (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_curlwp)));
  69         return l;
  70 }
  71
  72 __inline static void __unused
  73 cpu_set_curpri(int pri)
  74 {
  75
  76         __asm volatile(
  77             "movl %1, %%fs:%0" :
  78             "=m" (*(struct cpu_info *)offsetof(struct cpu_info, ci_schedstate.spc_curpriority)) :
  79             "r" (pri)
  80         );
  81 }
  82 #endif
  83
  84 #define CLKF_USERMODE(frame)    USERMODE((frame)->cf_if.if_cs, (frame)->cf_if.if_eflags)
  85 #define CLKF_PC(frame)          ((frame)->cf_if.if_eip)
  86 #define CLKF_INTR(frame)        (curcpu()->ci_idepth > 0)
  87 #define LWP_PC(l)               ((l)->l_md.md_regs->tf_eip)
  88
  89 #ifdef PAE
  90 void cpu_alloc_l3_page(struct cpu_info *);
  91 #endif /* PAE */
  92
  93 #endif  /* _KERNEL */
  94
  95 #endif /* !_I386_CPU_H_ */