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cpu.h revision 1.79.14.2 
      1 /*	$NetBSD: cpu.h,v 1.79.14.2 2017/12/03 11:35:48 jdolecek Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1982, 1990 The Regents of the University of California.
      6  * 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	7.7 (Berkeley) 6/27/91
     39  */
     40 
     41 #ifndef _MACHINE_CPU_H_
     42 #define _MACHINE_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  * Exported definitions unique to amiga/68k cpu support.
     56  */
     57 #define	M68K_MMU_MOTOROLA
     58 
     59 extern volatile unsigned int interrupt_depth;
     60 /*
     61  * Arguments to hardclock and gatherstats encapsulate the previous
     62  * machine state in an opaque clockframe.  On the amiga, we use
     63  * what the hardware pushes on an interrupt (frame format 0).
     64  */
     65 struct clockframe {
     66 	u_short	sr;		/* sr at time of interrupt */
     67 	u_long	pc;		/* pc at time of interrupt */
     68 	u_short	vo;		/* vector offset (4-word frame) */
     69 };
     70 
     71 #define	CLKF_USERMODE(framep)	(((framep)->sr & PSL_S) == 0)
     72 #define	CLKF_PC(framep)		((framep)->pc)
     73 #define	CLKF_INTR(framep)	(interrupt_depth > 1)
     74 
     75 
     76 /*
     77  * Preempt the current process if in interrupt from user mode,
     78  * or after the current trap/syscall if in system mode.
     79  */
     80 #define	cpu_need_resched(ci,flags)	do {	\
     81 	__USE(flags); 				\
     82 	ci->ci_want_resched = 1;		\
     83 	setsoftast();				\
     84 } while (/*CONSTCOND*/0)
     85 
     86 /*
     87  * Give a profiling tick to the current process from the softclock
     88  * interrupt.  On the amiga, request an ast to send us through trap(),
     89  * marking the proc as needing a profiling tick.
     90  */
     91 #define	profile_tick(l, framep)	((l)->l_pflag |= LP_OWEUPC, setsoftast())
     92 #define	cpu_need_proftick(l)	((l)->l_pflag |= LP_OWEUPC, setsoftast())
     93 
     94 /*
     95  * Notify the current process (p) that it has a signal pending,
     96  * process as soon as possible.
     97  */
     98 #define	cpu_signotify(l)	setsoftast()
     99 
    100 extern int astpending;		/* need trap before returning to user mode */
    101 #define setsoftast()		(astpending = 1)
    102 
    103 /*
    104  * The rest of this should probably be moved to ../amiga/amigacpu.h,
    105  * although some of it could probably be put into generic 68k headers.
    106  */
    107 
    108 /* values for machineid (happen to be AFF_* settings of AttnFlags) */
    109 #define AMIGA_68020	(1L<<1)
    110 #define AMIGA_68030	(1L<<2)
    111 #define AMIGA_68040	(1L<<3)
    112 #define AMIGA_68881	(1L<<4)
    113 #define AMIGA_68882	(1L<<5)
    114 #define	AMIGA_FPU40	(1L<<6)
    115 #define AMIGA_68060	(1L<<7)
    116 
    117 extern int machineid;
    118 
    119 #endif /* _KERNEL */
    120 
    121 /*
    122  * CTL_MACHDEP definitions.
    123  */
    124 #define CPU_CONSDEV	1	/* dev_t: console terminal device */
    125 #define CPU_MAXID	2	/* number of valid machdep ids */
    126 
    127 #ifdef _KERNEL
    128 /*
    129  * Prototypes from amiga_init.c
    130  */
    131 void	*alloc_z2mem(long);
    132 
    133 /*
    134  * Prototypes from autoconf.c
    135  */
    136 int	is_a600(void);
    137 int	is_a1200(void);
    138 int	is_a3000(void);
    139 int	is_a4000(void);
    140 #ifdef DRACO
    141 #define	is_draco() ((machineid >> 24) == 0x7d ? (machineid >> 16) & 0xff : 0)
    142 #endif
    143 
    144 #ifdef DRACO
    145 /*
    146  * Prototypes from kbd.c
    147  */
    148 void	drkbdintr(void);
    149 
    150 /*
    151  * Prototypes from drsc.c
    152  */
    153 void	drsc_handler(void);
    154 #endif
    155 
    156 /*
    157  * Prototypes from locore.s
    158  */
    159 void	clearseg(vm_offset_t);
    160 void	doboot(void) __attribute__((__noreturn__));
    161 void	loadustp(int);
    162 void	physcopyseg(vm_offset_t, vm_offset_t);
    163 u_int	probeva(u_int, u_int);
    164 
    165 /*
    166  * Prototypes from machdep.c
    167  */
    168 int	badaddr(void *);
    169 int	badbaddr(void *);
    170 void	bootsync(void);
    171 
    172 /*
    173  * Prototypes from pmap.c:
    174  */
    175 void	pmap_bootstrap(vm_offset_t, vm_offset_t);
    176 
    177 #endif /* _KERNEL */
    178 
    179 /*
    180  * Reorder protection when accessing device registers.
    181  */
    182 #define amiga_membarrier()
    183 
    184 /*
    185  * Finish all bus operations and flush pipelines.
    186  */
    187 #define amiga_cpu_sync() __asm volatile ("nop")
    188 
    189 #endif /* !_MACHINE_CPU_H_ */
    190