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cpu.h revision 1.65 
      1 /*	$NetBSD: cpu.h,v 1.65 2024/01/18 14:39:07 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 hardware pushes on an interrupt (frame format 0).
     63  */
     64 struct clockframe {
     65 	u_short	sr;		/* sr at time of interrupt */
     66 	u_long	pc;		/* pc at time of interrupt */
     67 	u_short	vo;		/* vector offset (4-word frame) */
     68 };
     69 
     70 #define	CLKF_USERMODE(framep)	(((framep)->sr & PSL_S) == 0)
     71 #define	CLKF_PC(framep)		((framep)->pc)
     72 #if 0
     73 /* We would like to do it this way... */
     74 #define	CLKF_INTR(framep)	(((framep)->sr & PSL_M) == 0)
     75 #else
     76 /* but until we start using PSL_M, we have to do this instead */
     77 #define	CLKF_INTR(framep)	(0)	/* XXX */
     78 #endif
     79 
     80 
     81 /*
     82  * Preempt the current process if in interrupt from user mode,
     83  * or after the current trap/syscall if in system mode.
     84  */
     85 #define	cpu_need_resched(ci,l,flags)	do {	\
     86 	__USE(flags);				\
     87 	aston();				\
     88 } while (/*CONSTCOND*/0)
     89 
     90 /*
     91  * Give a profiling tick to the current process when the user profiling
     92  * buffer pages are invalid.  On the x68k, request an ast to send us
     93  * through trap, marking the proc as needing a profiling tick.
     94  */
     95 #define	cpu_need_proftick(l)	\
     96 	do { (l)->l_pflag |= LP_OWEUPC; aston(); } while (/* CONSTCOND */ 0)
     97 
     98 /*
     99  * Notify the current process (p) that it has a signal pending,
    100  * process as soon as possible.
    101  */
    102 #define	cpu_signotify(l)	aston()
    103 
    104 extern int astpending;		/* need to trap before returning to user mode */
    105 #define aston() (astpending++)
    106 
    107 /*
    108  * The rest of this should probably be moved to <machine/x68kcpu.h>
    109  * although some of it could probably be put into generic 68k headers.
    110  */
    111 
    112 extern uint8_t *intiobase;
    113 extern uint8_t *intiolimit;
    114 
    115 /* machdep.c functions */
    116 void	dumpsys(void);
    117 
    118 /* machdep.c functions */
    119 int	badaddr(volatile void*);
    120 int	badbaddr(volatile void*);
    121 
    122 #endif
    123 
    124 /* physical memory sections */
    125 #define INTIOBASE	(0x00C00000)
    126 #define INTIOTOP	(0x01000000)
    127 
    128 /*
    129  * Internal IO space:
    130  *
    131  * Ranges from 0xC00000 to 0x1000000 (IIOMAPSIZE).
    132  *
    133  * Internal IO space is mapped in the kernel from ``IODEVbase'' to
    134  * ``intiolimit'' (defined in locore.s).  Since it is always mapped,
    135  * conversion between physical and kernel virtual addresses is easy.
    136  */
    137 #define	IIOV(pa)	((u_int)(pa) - INTIOBASE + (u_int)intiobase)
    138 #define	IIOP(va)	((u_int)(va) - (u_int)intiobase + INTIOBASE)
    139 #define	IIOPOFF(pa)	((int)(pa)-INTIOBASE)
    140 #define	IIOMAPSIZE	btoc(INTIOTOP-INTIOBASE)	/* 4mb */
    141 
    142 #endif /* _X68K_CPU_H_ */
    143