cpu.h revision 2866 
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 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	from: @(#)cpu.h	5.4 (Berkeley) 5/9/91
37 *	$Id: cpu.h,v 1.8 1994/09/16 01:05:24 ache Exp $
38 */
39
40#ifndef _MACHINE_CPU_H_
41#define	_MACHINE_CPU_H_
42
43/*
44 * Definitions unique to i386 cpu support.
45 */
46#include <machine/frame.h>
47#include <machine/segments.h>
48
49/*
50 * definitions of cpu-dependent requirements
51 * referenced in generic code
52 */
53#undef	COPY_SIGCODE		/* don't copy sigcode above user stack in exec */
54
55#define	cpu_exec(p)	/* nothing */
56#define cpu_swapin(p)	/* nothing */
57#define cpu_setstack(p, ap)		(p)->p_md.md_regs = ap
58#define cpu_set_init_frame(p, fp)	(p)->p_md.md_regs = fp
59
60#define	CLKF_USERMODE(framep)	(ISPL((framep)->cf_cs) == SEL_UPL)
61#define CLKF_INTR(framep)	(0)
62#define	CLKF_BASEPRI(framep)	(((framep)->cf_ppl & ~SWI_AST_MASK) == 0)
63#define	CLKF_PC(framep)		((framep)->cf_eip)
64
65#define resettodr()	/* no todr to set */
66
67/*
68 * Preempt the current process if in interrupt from user mode,
69 * or after the current trap/syscall if in system mode.
70 */
71#define	need_resched()	{ want_resched = 1; aston(); }
72
73/*
74 * Give a profiling tick to the current process from the softclock
75 * interrupt.  On tahoe, request an ast to send us through trap(),
76 * marking the proc as needing a profiling tick.
77 */
78#define	need_proftick(p)	{ (p)->p_flag |= P_OWEUPC; aston(); }
79
80/*
81 * Notify the current process (p) that it has a signal pending,
82 * process as soon as possible.
83 */
84#define	signotify(p)	aston()
85
86#define aston()	setsoftast()
87#define astoff()
88
89/*
90 * pull in #defines for kinds of processors
91 */
92#include <machine/cputypes.h>
93
94struct cpu_nameclass {
95	char *cpu_name;
96	int  cpu_class;
97};
98
99/*
100 * CTL_MACHDEP definitions.
101 */
102#define CPU_CONSDEV		1	/* dev_t: console terminal device */
103#define	CPU_ADJKERNTZ		2	/* int:	timezone offset	for resettodr()	*/
104#define	CPU_MAXID		3	/* number of valid machdep ids */
105
106#define CTL_MACHDEP_NAMES { \
107	{ 0, 0 }, \
108	{ "console_device", CTLTYPE_STRUCT }, \
109	{ "adjkerntz", CTLTYPE_INT }, \
110}
111
112#ifdef KERNEL
113extern int want_resched;	/* resched was called */
114
115extern int cpu;
116extern int cpu_class;
117extern struct cpu_nameclass i386_cpus[];
118#endif
119
120#endif /* !_MACHINE_CPU_H_ */
121