xref: /netbsd-src/sys/arch/x68k/include/cpu.h (revision 1b9578b8c2c1f848eeb16dabbfd7d1f0d9fdefbd)
1 /*	$NetBSD: cpu.h,v 1.54 2011/05/16 13:22:55 tsutsui 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)
45 
46 /*
47  * Exported definitions unique to x68k/68k cpu support.
48  */
49 
50 #if defined(_KERNEL_OPT)
51 #include "opt_m68k_arch.h"
52 #include "opt_lockdebug.h"
53 #endif
54 
55 /*
56  * Get common m68k CPU definitions.
57  */
58 #include <m68k/cpu.h>
59 #define	M68K_MMU_MOTOROLA
60 
61 /*
62  * Get interrupt glue.
63  */
64 #include <machine/intr.h>
65 
66 /*
67  * Arguments to hardclock and gatherstats encapsulate the previous
68  * machine state in an opaque clockframe.  One the x68k, we use
69  * what the hardware pushes on an interrupt (frame format 0).
70  */
71 struct clockframe {
72 	u_short	sr;		/* sr at time of interrupt */
73 	u_long	pc;		/* pc at time of interrupt */
74 	u_short	vo;		/* vector offset (4-word frame) */
75 };
76 
77 #define	CLKF_USERMODE(framep)	(((framep)->sr & PSL_S) == 0)
78 #define	CLKF_PC(framep)		((framep)->pc)
79 #if 0
80 /* We would like to do it this way... */
81 #define	CLKF_INTR(framep)	(((framep)->sr & PSL_M) == 0)
82 #else
83 /* but until we start using PSL_M, we have to do this instead */
84 #define	CLKF_INTR(framep)	(0)	/* XXX */
85 #endif
86 
87 
88 /*
89  * Preempt the current process if in interrupt from user mode,
90  * or after the current trap/syscall if in system mode.
91  */
92 #define	cpu_need_resched(ci, flags)	\
93 	do { (ci)->ci_want_resched = 1; aston(); } while (/* CONSTCOND */ 0)
94 
95 /*
96  * Give a profiling tick to the current process when the user profiling
97  * buffer pages are invalid.  On the x68k, request an ast to send us
98  * through trap, marking the proc as needing a profiling tick.
99  */
100 #define	cpu_need_proftick(l)	\
101 	do { (l)->l_pflag |= LP_OWEUPC; aston(); } while (/* CONSTCOND */ 0)
102 
103 /*
104  * Notify the current process (p) that it has a signal pending,
105  * process as soon as possible.
106  */
107 #define	cpu_signotify(l)	aston()
108 
109 extern int astpending;		/* need to trap before returning to user mode */
110 #define aston() (astpending++)
111 
112 #endif /* _KERNEL */
113 
114 /*
115  * CTL_MACHDEP definitions.
116  */
117 #define	CPU_CONSDEV		1	/* dev_t: console terminal device */
118 #define	CPU_MAXID		2	/* number of valid machdep ids */
119 
120 /*
121  * The rest of this should probably be moved to <machine/x68kcpu.h>
122  * although some of it could probably be put into generic 68k headers.
123  */
124 
125 #ifdef _KERNEL
126 extern int machineid;
127 extern uint8_t *intiobase;
128 extern uint8_t *intiolimit;
129 
130 /* fpu.c functions */
131 int	fpu_probe(void);
132 
133 /* machdep.c functions */
134 void	dumpsys(void);
135 
136 /* locore.s functions */
137 int	suline(void *, void *);
138 void	loadustp(int);
139 
140 /* machdep.c functions */
141 int	badaddr(volatile void*);
142 int	badbaddr(volatile void*);
143 
144 #endif
145 
146 /* physical memory sections */
147 #define INTIOBASE	(0x00C00000)
148 #define INTIOTOP	(0x01000000)
149 
150 /*
151  * Internal IO space:
152  *
153  * Ranges from 0xC00000 to 0x1000000 (IIOMAPSIZE).
154  *
155  * Internal IO space is mapped in the kernel from ``IODEVbase'' to
156  * ``intiolimit'' (defined in locore.s).  Since it is always mapped,
157  * conversion between physical and kernel virtual addresses is easy.
158  */
159 #define	IIOV(pa)	((u_int)(pa) - INTIOBASE + (u_int)intiobase)
160 #define	IIOP(va)	((u_int)(va) - (u_int)intiobase + INTIOBASE)
161 #define	IIOPOFF(pa)	((int)(pa)-INTIOBASE)
162 #define	IIOMAPSIZE	btoc(INTIOTOP-INTIOBASE)	/* 4mb */
163 
164 #endif /* _X68K_CPU_H_ */
165