sys/arch/amd64/include/cpu.h

   1 /*      $NetBSD: cpu.h,v 1.58 2008/10/26 00:08:15 mrg 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 _AMD64_CPU_H_
  38 #define _AMD64_CPU_H_
  39
  40 #ifdef __x86_64__
  41
  42 #include <x86/cpu.h>
  43
  44 #ifdef _KERNEL
  45
  46 #if defined(__GNUC__) && !defined(_MODULE)
  47 static struct cpu_info *x86_curcpu(void);
  48 static lwp_t *x86_curlwp(void);
  49
  50 __inline static struct cpu_info * __unused
  51 x86_curcpu(void)
  52 {
  53         struct cpu_info *ci;
  54
  55         __asm volatile("movq %%gs:%1, %0" :
  56             "=r" (ci) :
  57             "m"
  58             (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_self)));
  59         return ci;
  60 }
  61
  62 __inline static lwp_t * __unused __attribute__ ((const))
  63 x86_curlwp(void)
  64 {
  65         lwp_t *l;
  66
  67         __asm volatile("movq %%gs:%1, %0" :
  68             "=r" (l) :
  69             "m"
  70             (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_curlwp)));
  71         return l;
  72 }
  73
  74 __inline static void __unused
  75 cpu_set_curpri(int pri)
  76 {
  77
  78         __asm volatile(
  79             "movl %1, %%gs:%0" :
  80             "=m" (*(struct cpu_info *)offsetof(struct cpu_info, ci_schedstate.spc_curpriority)) :
  81             "r" (pri)
  82         );
  83 }
  84 #endif  /* __GNUC__ && !_MODULE */
  85
  86 #define CLKF_USERMODE(frame)    USERMODE((frame)->cf_if.if_tf.tf_cs, \
  87                                     (frame)->cf_if.if_tf.tf_rflags)
  88 #define CLKF_PC(frame)          ((frame)->cf_if.if_tf.tf_rip)
  89 #define CLKF_INTR(frame)        (curcpu()->ci_idepth > 0)
  90 #define LWP_PC(l)               ((l)->l_md.md_regs->tf_rip)
  91
  92 #endif  /* _KERNEL */
  93
  94 #else   /*      __x86_64__      */
  95
  96 #include <i386/cpu.h>
  97
  98 #endif  /*      __x86_64__      */
  99
 100 #endif /* !_AMD64_CPU_H_ */