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cpu.h revision 1.173 
      1 /*	$NetBSD: cpu.h,v 1.173 2008/05/11 15:32:20 ad 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 #if defined(__GNUC__) && !defined(_LKM)
     43 static struct cpu_info *x86_curcpu(void);
     44 static lwp_t *x86_curlwp(void);
     45 
     46 __inline static struct cpu_info * __unused
     47 x86_curcpu(void)
     48 {
     49 	struct cpu_info *ci;
     50 
     51 	__asm volatile("movl %%fs:%1, %0" :
     52 	    "=r" (ci) :
     53 	    "m"
     54 	    (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_self)));
     55 	return ci;
     56 }
     57 
     58 __inline static lwp_t * __unused
     59 x86_curlwp(void)
     60 {
     61 	lwp_t *l;
     62 
     63 	__asm volatile("movl %%fs:%1, %0" :
     64 	    "=r" (l) :
     65 	    "m"
     66 	    (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_curlwp)));
     67 	return l;
     68 }
     69 __inline static void __unused
     70 cpu_set_curpri(int pri)
     71 {
     72 
     73 	__asm volatile(
     74 	    "movl %1, %%fs:%0" :
     75 	    "=m" (*(struct cpu_info *)offsetof(struct cpu_info, ci_schedstate.spc_curpriority)) :
     76 	    "r" (pri)
     77 	);
     78 }
     79 #endif
     80 
     81 #define	CLKF_USERMODE(frame)	USERMODE((frame)->cf_if.if_cs, (frame)->cf_if.if_eflags)
     82 #define	CLKF_PC(frame)		((frame)->cf_if.if_eip)
     83 #define	CLKF_INTR(frame)	(curcpu()->ci_idepth > 0)
     84 #define	LWP_PC(l)		((l)->l_md.md_regs->tf_eip)
     85 
     86 #endif /* !_I386_CPU_H_ */
     87