cpu.h revision 1.60 
1/*	$NetBSD: cpu.h,v 1.60 2018/08/22 01:05:23 msaitoh 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_m68k_arch.h"
46#include "opt_lockdebug.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 x68k/68k cpu support.
57 */
58#define	M68K_MMU_MOTOROLA
59
60/*
61 * Get interrupt glue.
62 */
63#include <machine/intr.h>
64
65/*
66 * Arguments to hardclock and gatherstats encapsulate the previous
67 * machine state in an opaque clockframe.  On the x68k, we use
68 * what the hardware pushes on an interrupt (frame format 0).
69 */
70struct clockframe {
71	u_short	sr;		/* sr at time of interrupt */
72	u_long	pc;		/* pc at time of interrupt */
73	u_short	vo;		/* vector offset (4-word frame) */
74};
75
76#define	CLKF_USERMODE(framep)	(((framep)->sr & PSL_S) == 0)
77#define	CLKF_PC(framep)		((framep)->pc)
78#if 0
79/* We would like to do it this way... */
80#define	CLKF_INTR(framep)	(((framep)->sr & PSL_M) == 0)
81#else
82/* but until we start using PSL_M, we have to do this instead */
83#define	CLKF_INTR(framep)	(0)	/* XXX */
84#endif
85
86
87/*
88 * Preempt the current process if in interrupt from user mode,
89 * or after the current trap/syscall if in system mode.
90 */
91#define	cpu_need_resched(ci,flags)	do {	\
92	__USE(flags); 				\
93	ci->ci_want_resched = 1;		\
94	aston();				\
95} while (/*CONSTCOND*/0)
96
97/*
98 * Give a profiling tick to the current process when the user profiling
99 * buffer pages are invalid.  On the x68k, request an ast to send us
100 * through trap, marking the proc as needing a profiling tick.
101 */
102#define	cpu_need_proftick(l)	\
103	do { (l)->l_pflag |= LP_OWEUPC; aston(); } while (/* CONSTCOND */ 0)
104
105/*
106 * Notify the current process (p) that it has a signal pending,
107 * process as soon as possible.
108 */
109#define	cpu_signotify(l)	aston()
110
111extern int astpending;		/* need to trap before returning to user mode */
112#define aston() (astpending++)
113
114/*
115 * The rest of this should probably be moved to <machine/x68kcpu.h>
116 * although some of it could probably be put into generic 68k headers.
117 */
118
119extern uint8_t *intiobase;
120extern uint8_t *intiolimit;
121
122/* machdep.c functions */
123void	dumpsys(void);
124
125/* locore.s functions */
126int	suline(void *, void *);
127void	loadustp(int);
128
129/* machdep.c functions */
130int	badaddr(volatile void*);
131int	badbaddr(volatile void*);
132
133#endif
134
135/* physical memory sections */
136#define INTIOBASE	(0x00C00000)
137#define INTIOTOP	(0x01000000)
138
139/*
140 * Internal IO space:
141 *
142 * Ranges from 0xC00000 to 0x1000000 (IIOMAPSIZE).
143 *
144 * Internal IO space is mapped in the kernel from ``IODEVbase'' to
145 * ``intiolimit'' (defined in locore.s).  Since it is always mapped,
146 * conversion between physical and kernel virtual addresses is easy.
147 */
148#define	IIOV(pa)	((u_int)(pa) - INTIOBASE + (u_int)intiobase)
149#define	IIOP(va)	((u_int)(va) - (u_int)intiobase + INTIOBASE)
150#define	IIOPOFF(pa)	((int)(pa)-INTIOBASE)
151#define	IIOMAPSIZE	btoc(INTIOTOP-INTIOBASE)	/* 4mb */
152
153#endif /* _X68K_CPU_H_ */
154