1/*	$NetBSD: cpu.h,v 1.183 2021/11/02 11:26:04 ryo 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)
45static struct cpu_info *x86_curcpu(void);
46static lwp_t *x86_curlwp(void);
47
48__inline __always_inline static struct cpu_info * __unused
49x86_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))
61x86_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#endif
72
73#ifdef XENPV
74#define	CLKF_USERMODE(frame)	(curcpu()->ci_xen_clockf_usermode)
75#define CLKF_PC(frame)		(curcpu()->ci_xen_clockf_pc)
76#else /* XENPV */
77#define	CLKF_USERMODE(frame)	USERMODE((frame)->cf_if.if_cs)
78#define	CLKF_PC(frame)		((frame)->cf_if.if_eip)
79#endif /* XENPV */
80#define	CLKF_INTR(frame)	(curcpu()->ci_idepth > 0)
81#define	LWP_PC(l)		((l)->l_md.md_regs->tf_eip)
82
83#ifdef PAE
84void cpu_alloc_l3_page(struct cpu_info *);
85#endif /* PAE */
86
87#endif	/* _KERNEL */
88
89#endif /* !_I386_CPU_H_ */