1 /* $NetBSD: cpu.h,v 1.71 2023/04/09 08:17:56 riastradh 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
48 static struct cpu_info *x86_curcpu(void);
49 static lwp_t *x86_curlwp(void);
50
51 __inline __always_inline static struct cpu_info * __unused __nomsan
x86_curcpu(void)52 x86_curcpu(void)
53 {
54 struct cpu_info *ci;
55
56 __asm("movq %%gs:%1, %0" :
57 "=r" (ci) :
58 "m"
59 (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_self)));
60 return ci;
61 }
62
63 __inline static lwp_t * __unused __nomsan __attribute__ ((const))
x86_curlwp(void)64 x86_curlwp(void)
65 {
66 lwp_t *l;
67
68 __asm("movq %%gs:%1, %0" :
69 "=r" (l) :
70 "m"
71 (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_curlwp)));
72 return l;
73 }
74
75 #endif /* __GNUC__ && !_MODULE */
76
77 #ifdef XENPV
78 #define CLKF_USERMODE(frame) (curcpu()->ci_xen_clockf_usermode)
79 #define CLKF_PC(frame) (curcpu()->ci_xen_clockf_pc)
80 #else /* XENPV */
81 #define CLKF_USERMODE(frame) USERMODE((frame)->cf_if.if_tf.tf_cs)
82 #define CLKF_PC(frame) ((frame)->cf_if.if_tf.tf_rip)
83 #endif /* XENPV */
84 #define CLKF_INTR(frame) (curcpu()->ci_idepth > 0)
85 #define LWP_PC(l) ((l)->l_md.md_regs->tf_rip)
86
87 void *cpu_uarea_alloc(bool);
88 bool cpu_uarea_free(void *);
89
90 #endif /* _KERNEL */
91
92 #else /* __x86_64__ */
93
94 #include <i386/cpu.h>
95
96 #endif /* __x86_64__ */
97
98 #endif /* !_AMD64_CPU_H_ */
99