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cpu.h revision 1.64 
      1 /*	$NetBSD: cpu.h,v 1.64 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 _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  */
     70 struct 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,l,flags)	do {	\
     92 	__USE(flags);				\
     93 	aston();				\
     94 } while (/*CONSTCOND*/0)
     95 
     96 /*
     97  * Give a profiling tick to the current process when the user profiling
     98  * buffer pages are invalid.  On the x68k, request an ast to send us
     99  * through trap, marking the proc as needing a profiling tick.
    100  */
    101 #define	cpu_need_proftick(l)	\
    102 	do { (l)->l_pflag |= LP_OWEUPC; aston(); } while (/* CONSTCOND */ 0)
    103 
    104 /*
    105  * Notify the current process (p) that it has a signal pending,
    106  * process as soon as possible.
    107  */
    108 #define	cpu_signotify(l)	aston()
    109 
    110 extern int astpending;		/* need to trap before returning to user mode */
    111 #define aston() (astpending++)
    112 
    113 /*
    114  * The rest of this should probably be moved to <machine/x68kcpu.h>
    115  * although some of it could probably be put into generic 68k headers.
    116  */
    117 
    118 extern uint8_t *intiobase;
    119 extern uint8_t *intiolimit;
    120 
    121 /* machdep.c functions */
    122 void	dumpsys(void);
    123 
    124 /* machdep.c functions */
    125 int	badaddr(volatile void*);
    126 int	badbaddr(volatile void*);
    127 
    128 #endif
    129 
    130 /* physical memory sections */
    131 #define INTIOBASE	(0x00C00000)
    132 #define INTIOTOP	(0x01000000)
    133 
    134 /*
    135  * Internal IO space:
    136  *
    137  * Ranges from 0xC00000 to 0x1000000 (IIOMAPSIZE).
    138  *
    139  * Internal IO space is mapped in the kernel from ``IODEVbase'' to
    140  * ``intiolimit'' (defined in locore.s).  Since it is always mapped,
    141  * conversion between physical and kernel virtual addresses is easy.
    142  */
    143 #define	IIOV(pa)	((u_int)(pa) - INTIOBASE + (u_int)intiobase)
    144 #define	IIOP(va)	((u_int)(va) - (u_int)intiobase + INTIOBASE)
    145 #define	IIOPOFF(pa)	((int)(pa)-INTIOBASE)
    146 #define	IIOMAPSIZE	btoc(INTIOTOP-INTIOBASE)	/* 4mb */
    147 
    148 #endif /* _X68K_CPU_H_ */
    149