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cpu.h revision 1.54 
      1 /*	$NetBSD: cpu.h,v 1.54 2024/01/18 05:12:30 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 #include "opt_mvmeconf.h"
     48 #endif
     49 
     50 /*
     51  * Get common m68k CPU definitions.
     52  */
     53 #include <m68k/cpu.h>
     54 
     55 #if defined(_KERNEL)
     56 /*
     57  * Exported definitions unique to mvme68k/68k cpu support.
     58  */
     59 #define	M68K_MMU_MOTOROLA
     60 
     61 /*
     62  * Arguments to hardclock and gatherstats encapsulate the previous
     63  * machine state in an opaque clockframe.  On the mvme68k, we use
     64  * what the locore.s glue puts on the stack before calling C-code.
     65  */
     66 struct clockframe {
     67 	u_int	cf_regs[4];	/* d0,d1,a0,a1 */
     68 	u_short	cf_sr;		/* sr at time of interrupt */
     69 	u_long	cf_pc;		/* pc at time of interrupt */
     70 	u_short	cf_vo;		/* vector offset (4-word frame) */
     71 } __attribute__((packed));
     72 
     73 #define	CLKF_USERMODE(framep)	(((framep)->cf_sr & PSL_S) == 0)
     74 #define	CLKF_PC(framep)		((framep)->cf_pc)
     75 
     76 /*
     77  * The clock interrupt handler can determine if it's a nested
     78  * interrupt by checking for interrupt_depth > 1.
     79  * (Remember, the clock interrupt handler itself will cause the
     80  * depth counter to be incremented).
     81  */
     82 #define	CLKF_INTR(framep)	(idepth > 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 mvme68k, 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 
    107 extern int astpending;		/* need to trap before returning to user mode */
    108 #define aston() (astpending++)
    109 
    110 #define	MVME68K		1	/* XXX */
    111 
    112 #endif /* _KERNEL */
    113 
    114 /*
    115  * Values for machineid; these match the Bug's values.
    116  */
    117 #define	MVME_147	0x147
    118 #define	MVME_162	0x162
    119 #define	MVME_166	0x166
    120 #define	MVME_167	0x167
    121 #define	MVME_172	0x172
    122 #define	MVME_177	0x177
    123 
    124 #ifdef _KERNEL
    125 extern	int machineid;
    126 extern	int cpuspeed;
    127 extern	char *intiobase, *intiolimit;
    128 extern	u_int intiobase_phys, intiotop_phys;
    129 extern	u_long ether_data_buff_size;
    130 extern	u_char mvme_ea[6];
    131 
    132 void	doboot(int)
    133 	__attribute__((__noreturn__));
    134 int	nmihand(void *);
    135 void	mvme68k_abort(const char *);
    136 void	*iomap(u_long, size_t);
    137 void	iounmap(void *, size_t);
    138 
    139 /* physical memory addresses where mvme147's onboard devices live */
    140 #define	INTIOBASE147	(0xfffe0000u)
    141 #define	INTIOTOP147	(0xfffe5000u)
    142 
    143 /* ditto for mvme1[67][27] */
    144 #define	INTIOBASE1xx	(0xfff40000u)
    145 #define	INTIOTOP1xx	(0xfffd0000u)
    146 
    147 #endif /* _KERNEL */
    148 
    149 #endif /* _MACHINE_CPU_H_ */
    150