cpu.h revision 1.4 
1/*	$NetBSD: cpu.h,v 1.4 2024/01/09 04:16:27 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#include "opt_m68k_arch.h"
47#endif
48
49/*
50 * Get common m68k CPU definitions.
51 */
52#include <m68k/cpu.h>
53
54#if defined(_KERNEL)
55/*
56 * Exported definitions unique to virt68k/68k cpu support.
57 */
58#define	M68K_MMU_MOTOROLA
59
60/*
61 * Arguments to hardclock and gatherstats encapsulate the previous
62 * machine state in an opaque clockframe.  On the virt68k, we use
63 * what the hardware pushes on an interrupt (frame format 0).
64 */
65struct clockframe {
66	u_short	sr;		/* sr at time of interrupt */
67	u_long	pc;		/* pc at time of interrupt */
68	u_short	fmt:4,
69		vec:12;		/* vector offset (4-word frame) */
70} __attribute__((packed));
71
72#define	CLKF_USERMODE(framep)	(((framep)->sr & PSL_S) == 0)
73#define	CLKF_PC(framep)		((framep)->pc)
74
75/*
76 * The clock interrupt handler can determine if it's a nested
77 * interrupt by checking for intr_depth > 1.
78 * (Remember, the clock interrupt handler itself will cause the
79 * depth counter to be incremented).
80 */
81extern volatile unsigned int intr_depth;
82#define	CLKF_INTR(framep)	(intr_depth > 1)
83
84/*
85 * Preempt the current process if in interrupt from user mode,
86 * or after the current trap/syscall if in system mode.
87 */
88#define	cpu_need_resched(ci,l,flags)	do {	\
89	__USE(flags); 				\
90	aston();				\
91} while (/*CONSTCOND*/0)
92
93/*
94 * Give a profiling tick to the current process when the user profiling
95 * buffer pages are invalid.  On the virt68k, request an ast to send us
96 * through trap, marking the proc as needing a profiling tick.
97 */
98#define	cpu_need_proftick(l)	\
99	do { (l)->l_pflag |= LP_OWEUPC; aston(); } while (/* CONSTCOND */0)
100
101/*
102 * Notify the current process (p) that it has a signal pending,
103 * process as soon as possible.
104 */
105#define	cpu_signotify(l)	aston()
106
107extern int astpending;		/* need to trap before returning to user mode */
108#define aston() (astpending++)
109
110#endif /* _KERNEL */
111
112#ifdef _KERNEL
113void	cpu_set_reset_func(void (*)(void *, int), void *);
114int	nmihand(void *);
115
116#endif /* _KERNEL */
117
118#endif /* _MACHINE_CPU_H_ */
119