cpu.h revision 1.6 
1/*	$NetBSD: cpu.h,v 1.6 2024/01/19 05:46:36 thorpej Exp $	*/
2
3/*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1990, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. 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: Utah $Hdr: cpu.h 1.16 91/03/25$
37 *
38 *	@(#)cpu.h	8.4 (Berkeley) 1/5/94
39 */
40
41#ifndef _MACHINE_CPU_H_
42#define _MACHINE_CPU_H_
43
44#if defined(_KERNEL_OPT)
45#include "opt_lockdebug.h"
46#endif
47
48/*
49 * Get common m68k CPU definitions.
50 */
51#include <m68k/cpu.h>
52
53#if defined(_KERNEL)
54/*
55 * Arguments to hardclock and gatherstats encapsulate the previous
56 * machine state in an opaque clockframe.  On the virt68k, we use
57 * what the locore.s glue puts on the stack before calling C-code.
58 */
59struct clockframe {
60	u_int	cf_regs[4];	/* d0,d1,a0,a1 */
61	u_short	cf_sr;		/* sr at time of interrupt */
62	u_long	cf_pc;		/* pc at time of interrupt */
63	u_short	cf_vo;		/* vector offset (4-word frame) */
64} __attribute__((packed));
65
66#define	CLKF_USERMODE(framep)	(((framep)->cf_sr & PSL_S) == 0)
67#define	CLKF_PC(framep)		((framep)->cf_pc)
68
69/*
70 * The clock interrupt handler can determine if it's a nested
71 * interrupt by checking for intr_depth > 1.
72 * (Remember, the clock interrupt handler itself will cause the
73 * depth counter to be incremented).
74 */
75extern volatile unsigned int intr_depth;
76#define	CLKF_INTR(framep)	(intr_depth > 1)
77
78/*
79 * Preempt the current process if in interrupt from user mode,
80 * or after the current trap/syscall if in system mode.
81 */
82#define	cpu_need_resched(ci,l,flags)	do {	\
83	__USE(flags); 				\
84	aston();				\
85} while (/*CONSTCOND*/0)
86
87/*
88 * Give a profiling tick to the current process when the user profiling
89 * buffer pages are invalid.  On the virt68k, request an ast to send us
90 * through trap, marking the proc as needing a profiling tick.
91 */
92#define	cpu_need_proftick(l)	\
93	do { (l)->l_pflag |= LP_OWEUPC; aston(); } while (/* CONSTCOND */0)
94
95/*
96 * Notify the current process (p) that it has a signal pending,
97 * process as soon as possible.
98 */
99#define	cpu_signotify(l)	aston()
100
101extern int astpending;		/* need to trap before returning to user mode */
102#define aston() (astpending++)
103
104#endif /* _KERNEL */
105
106#ifdef _KERNEL
107void	cpu_set_reset_func(void (*)(void *, int), void *);
108int	nmihand(void *);
109
110#endif /* _KERNEL */
111
112#endif /* _MACHINE_CPU_H_ */
113