cpu.h revision 1.66 
1/*	$NetBSD: cpu.h,v 1.66 2024/01/19 18:49:10 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 _X68K_CPU_H_
42#define	_X68K_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 * Get interrupt glue.
56 */
57#include <machine/intr.h>
58
59/*
60 * Arguments to hardclock and gatherstats encapsulate the previous
61 * machine state in an opaque clockframe.  On the x68k, we use
62 * what the locore.s glue puts on the stack before calling C-code.
63 */
64struct clockframe {
65	u_int	cf_regs[4];	/* d0,d1,a0,a1 */
66	u_short	cf_sr;		/* sr at time of interrupt */
67	u_long	cf_pc;		/* pc at time of interrupt */
68	u_short	cf_vo;		/* vector offset (4-word frame) */
69} __attribute__((__packed__));
70
71#define	CLKF_USERMODE(framep)	(((framep)->cf_sr & PSL_S) == 0)
72#define	CLKF_PC(framep)		((framep)->cf_pc)
73#if 0
74/* We would like to do it this way... */
75#define	CLKF_INTR(framep)	(((framep)->cf_sr & PSL_M) == 0)
76#else
77/* but until we start using PSL_M, we have to do this instead */
78#define	CLKF_INTR(framep)	(0)	/* XXX */
79#endif
80
81
82/*
83 * Preempt the current process if in interrupt from user mode,
84 * or after the current trap/syscall if in system mode.
85 */
86#define	cpu_need_resched(ci,l,flags)	do {	\
87	__USE(flags);				\
88	aston();				\
89} while (/*CONSTCOND*/0)
90
91/*
92 * Give a profiling tick to the current process when the user profiling
93 * buffer pages are invalid.  On the x68k, request an ast to send us
94 * through trap, marking the proc as needing a profiling tick.
95 */
96#define	cpu_need_proftick(l)	\
97	do { (l)->l_pflag |= LP_OWEUPC; aston(); } while (/* CONSTCOND */ 0)
98
99/*
100 * Notify the current process (p) that it has a signal pending,
101 * process as soon as possible.
102 */
103#define	cpu_signotify(l)	aston()
104
105extern int astpending;		/* need to trap before returning to user mode */
106#define aston() (astpending++)
107
108/*
109 * The rest of this should probably be moved to <machine/x68kcpu.h>
110 * although some of it could probably be put into generic 68k headers.
111 */
112
113extern uint8_t *intiobase;
114extern uint8_t *intiolimit;
115
116/* machdep.c functions */
117void	dumpsys(void);
118
119/* machdep.c functions */
120int	badaddr(volatile void*);
121int	badbaddr(volatile void*);
122
123#endif
124
125/* physical memory sections */
126#define INTIOBASE	(0x00C00000)
127#define INTIOTOP	(0x01000000)
128
129/*
130 * Internal IO space:
131 *
132 * Ranges from 0xC00000 to 0x1000000 (IIOMAPSIZE).
133 *
134 * Internal IO space is mapped in the kernel from ``IODEVbase'' to
135 * ``intiolimit'' (defined in locore.s).  Since it is always mapped,
136 * conversion between physical and kernel virtual addresses is easy.
137 */
138#define	IIOV(pa)	((u_int)(pa) - INTIOBASE + (u_int)intiobase)
139#define	IIOP(va)	((u_int)(va) - (u_int)intiobase + INTIOBASE)
140#define	IIOPOFF(pa)	((int)(pa)-INTIOBASE)
141#define	IIOMAPSIZE	btoc(INTIOTOP-INTIOBASE)	/* 4mb */
142
143#endif /* _X68K_CPU_H_ */
144