cpu.h revision 1.56 
1/*	$NetBSD: cpu.h,v 1.56 2008/05/11 16:57:43 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 _AMD64_CPU_H_
38#define _AMD64_CPU_H_
39
40#include <x86/cpu.h>
41
42#ifdef _KERNEL
43
44#if defined(__GNUC__) && !defined(_LKM)
45static struct cpu_info *x86_curcpu(void);
46static lwp_t *x86_curlwp(void);
47
48__inline static struct cpu_info * __unused
49x86_curcpu(void)
50{
51	struct cpu_info *ci;
52
53	__asm volatile("movq %%gs:%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 * __unused
61x86_curlwp(void)
62{
63	lwp_t *l;
64
65	__asm volatile("movq %%gs:%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
73cpu_set_curpri(int pri)
74{
75
76	__asm volatile(
77	    "movl %1, %%gs:%0" :
78	    "=m" (*(struct cpu_info *)offsetof(struct cpu_info, ci_schedstate.spc_curpriority)) :
79	    "r" (pri)
80	);
81}
82#endif	/* __GNUC__ && !_LKM */
83
84#define	CLKF_USERMODE(frame)	USERMODE((frame)->cf_if.if_tf.tf_cs, \
85				    (frame)->cf_if.if_tf.tf_rflags)
86#define CLKF_PC(frame)		((frame)->cf_if.if_tf.tf_rip)
87#define CLKF_INTR(frame)	(curcpu()->ci_idepth > 0)
88#define LWP_PC(l)		((l)->l_md.md_regs->tf_rip)
89
90#endif	/* _KERNEL */
91
92#endif /* !_AMD64_CPU_H_ */
93