FreeBSD/Linux Kernel Cross Reference
sys/i386/include/cpu.h
1 /*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * from: @(#)cpu.h 5.4 (Berkeley) 5/9/91
33 * $FreeBSD$
34 */
35
36 #ifndef _MACHINE_CPU_H_
37 #define _MACHINE_CPU_H_
38
39 /*
40 * Definitions unique to i386 cpu support.
41 */
42 #include <machine/psl.h>
43 #include <machine/frame.h>
44 #include <machine/segments.h>
45
46 #define cpu_exec(p) /* nothing */
47 #define cpu_swapin(p) /* nothing */
48 #define cpu_getstack(td) ((td)->td_frame->tf_esp)
49 #define cpu_setstack(td, ap) ((td)->td_frame->tf_esp = (ap))
50 #define cpu_spinwait() ia32_pause()
51
52 #define TRAPF_USERMODE(framep) \
53 ((ISPL((framep)->tf_cs) == SEL_UPL) || ((framep)->tf_eflags & PSL_VM))
54 #define TRAPF_PC(framep) ((framep)->tf_eip)
55
56 #ifdef _KERNEL
57 extern char btext[];
58 extern char etext[];
59
60 void cpu_halt(void);
61 void cpu_reset(void);
62 void fork_trampoline(void);
63 void swi_vm(void *);
64
65 /*
66 * Return contents of in-cpu fast counter as a sort of "bogo-time"
67 * for random-harvesting purposes.
68 */
69 static __inline uint64_t
70 get_cyclecount(void)
71 {
72
73 return (cpu_ticks());
74 }
75
76 #endif
77
78 #endif /* !_MACHINE_CPU_H_ */
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