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cpu.h revision 1.83 
      1 /*	$NetBSD: cpu.h,v 1.83 2019/11/23 19:40:34 ad 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,l,flags)	do {	\
     81 	__USE(flags); 				\
     82 	setsoftast();				\
     83 } while (/*CONSTCOND*/0)
     84 
     85 /*
     86  * Give a profiling tick to the current process from the softclock
     87  * interrupt.  On the amiga, request an ast to send us through trap(),
     88  * marking the proc as needing a profiling tick.
     89  */
     90 #define	profile_tick(l, framep)	((l)->l_pflag |= LP_OWEUPC, setsoftast())
     91 #define	cpu_need_proftick(l)	((l)->l_pflag |= LP_OWEUPC, setsoftast())
     92 
     93 /*
     94  * Notify the current process (p) that it has a signal pending,
     95  * process as soon as possible.
     96  */
     97 #define	cpu_signotify(l)	setsoftast()
     98 
     99 extern int astpending;		/* need trap before returning to user mode */
    100 #define setsoftast()		(astpending = 1)
    101 
    102 /*
    103  * The rest of this should probably be moved to ../amiga/amigacpu.h,
    104  * although some of it could probably be put into generic 68k headers.
    105  */
    106 
    107 /* values for machineid (happen to be AFF_* settings of AttnFlags) */
    108 #define AMIGA_68020	(1L<<1)
    109 #define AMIGA_68030	(1L<<2)
    110 #define AMIGA_68040	(1L<<3)
    111 #define AMIGA_68881	(1L<<4)
    112 #define AMIGA_68882	(1L<<5)
    113 #define	AMIGA_FPU40	(1L<<6)
    114 #define AMIGA_68060	(1L<<7)
    115 
    116 extern int machineid;
    117 
    118 /*
    119  * Prototypes from amiga_init.c
    120  */
    121 void	*alloc_z2mem(long);
    122 
    123 /*
    124  * Prototypes from autoconf.c
    125  */
    126 int	is_a600(void);
    127 int	is_a1200(void);
    128 int	is_a3000(void);
    129 int	is_a4000(void);
    130 #ifdef DRACO
    131 #define	is_draco() ((machineid >> 24) == 0x7d ? (machineid >> 16) & 0xff : 0)
    132 #endif
    133 
    134 #ifdef DRACO
    135 /*
    136  * Prototypes from kbd.c
    137  */
    138 void	drkbdintr(void);
    139 
    140 /*
    141  * Prototypes from drsc.c
    142  */
    143 void	drsc_handler(void);
    144 #endif
    145 
    146 /*
    147  * Prototypes from locore.s
    148  */
    149 void	clearseg(vm_offset_t);
    150 void	doboot(void) __attribute__((__noreturn__));
    151 void	loadustp(int);
    152 void	physcopyseg(vm_offset_t, vm_offset_t);
    153 u_int	probeva(u_int, u_int);
    154 
    155 /*
    156  * Prototypes from machdep.c
    157  */
    158 int	badaddr(void *);
    159 int	badbaddr(void *);
    160 void	bootsync(void);
    161 
    162 /*
    163  * Prototypes from pmap.c:
    164  */
    165 void	pmap_bootstrap(vm_offset_t, vm_offset_t);
    166 
    167 #endif /* _KERNEL */
    168 
    169 /*
    170  * Reorder protection when accessing device registers.
    171  */
    172 #define amiga_membarrier()
    173 
    174 /*
    175  * Finish all bus operations and flush pipelines.
    176  */
    177 #define amiga_cpu_sync() __asm volatile ("nop")
    178 
    179 #endif /* !_MACHINE_CPU_H_ */
    180