1 /* $NetBSD: cpu.h,v 1.178 2011/12/30 17:57:49 cherry 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)
45 static struct cpu_info *x86_curcpu(void);
46 static lwp_t *x86_curlwp(void);
47
48 __inline static struct cpu_info * __unused
x86_curcpu(void)49 x86_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))
x86_curlwp(void)61 x86_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
72 __inline static void __unused
cpu_set_curpri(int pri)73 cpu_set_curpri(int pri)
74 {
75
76 __asm volatile(
77 "movl %1, %%fs:%0" :
78 "=m" (*(struct cpu_info *)offsetof(struct cpu_info, ci_schedstate.spc_curpriority)) :
79 "r" (pri)
80 );
81 }
82 #endif
83
84 #define CLKF_USERMODE(frame) USERMODE((frame)->cf_if.if_cs, (frame)->cf_if.if_eflags)
85 #define CLKF_PC(frame) ((frame)->cf_if.if_eip)
86 #define CLKF_INTR(frame) (curcpu()->ci_idepth > 0)
87 #define LWP_PC(l) ((l)->l_md.md_regs->tf_eip)
88
89 #ifdef PAE
90 void cpu_alloc_l3_page(struct cpu_info *);
91 #endif /* PAE */
92
93 #endif /* _KERNEL */
94
95 #if defined(__minix)
96 #include <x86/psl.h>
97 /* User flags are S (Status) and C (Control) flags. */
98 #define X86_FLAGS_USER (PSL_C | PSL_PF | PSL_AF | PSL_Z | \
99 PSL_N | PSL_D | PSL_V)
100 #endif /* defined(__minix) */
101
102 #endif /* !_I386_CPU_H_ */
103