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cpu.h revision 1.53 
      1 /*	$NetBSD: cpu.h,v 1.53 2011/05/12 15:07:42 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 struct fpframe;
    138 int	suline(void *, void *);
    139 void	loadustp(int);
    140 void	m68881_save(struct fpframe *);
    141 void	m68881_restore(struct fpframe *);
    142 
    143 /* machdep.c functions */
    144 int	badaddr(volatile void*);
    145 int	badbaddr(volatile void*);
    146 
    147 #endif
    148 
    149 /* physical memory sections */
    150 #define INTIOBASE	(0x00C00000)
    151 #define INTIOTOP	(0x01000000)
    152 
    153 /*
    154  * Internal IO space:
    155  *
    156  * Ranges from 0xC00000 to 0x1000000 (IIOMAPSIZE).
    157  *
    158  * Internal IO space is mapped in the kernel from ``IODEVbase'' to
    159  * ``intiolimit'' (defined in locore.s).  Since it is always mapped,
    160  * conversion between physical and kernel virtual addresses is easy.
    161  */
    162 #define	IIOV(pa)	((u_int)(pa) - INTIOBASE + (u_int)intiobase)
    163 #define	IIOP(va)	((u_int)(va) - (u_int)intiobase + INTIOBASE)
    164 #define	IIOPOFF(pa)	((int)(pa)-INTIOBASE)
    165 #define	IIOMAPSIZE	btoc(INTIOTOP-INTIOBASE)	/* 4mb */
    166 
    167 #endif /* _X68K_CPU_H_ */
    168