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cpu.h revision 1.86 
      1 /*	$NetBSD: cpu.h,v 1.86 2024/01/19 17:08:42 thorpej 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 extern volatile unsigned int interrupt_depth;
     55 /*
     56  * Arguments to hardclock and gatherstats encapsulate the previous
     57  * machine state in an opaque clockframe.  On the amiga, we use
     58  * what the locore.s glue puts on the stack before calling C-code.
     59  */
     60 struct clockframe {
     61 	u_int	cf_regs[4];	/* d0,d1,a0,a1 */
     62 	u_short	cf_sr;		/* sr at time of interrupt */
     63 	u_long	cf_pc;		/* pc at time of interrupt */
     64 	u_short	cf_vo;		/* vector offset (4-word frame) */
     65 } __attribute__((__packed__));
     66 
     67 #define	CLKF_USERMODE(framep)	(((framep)->cf_sr & PSL_S) == 0)
     68 #define	CLKF_PC(framep)		((framep)->cf_pc)
     69 #define	CLKF_INTR(framep)	(interrupt_depth > 1)
     70 
     71 /*
     72  * Preempt the current process if in interrupt from user mode,
     73  * or after the current trap/syscall if in system mode.
     74  */
     75 #define	cpu_need_resched(ci,l,flags)	do {	\
     76 	__USE(flags); 				\
     77 	setsoftast();				\
     78 } while (/*CONSTCOND*/0)
     79 
     80 /*
     81  * Give a profiling tick to the current process from the softclock
     82  * interrupt.  On the amiga, request an ast to send us through trap(),
     83  * marking the proc as needing a profiling tick.
     84  */
     85 #define	profile_tick(l, framep)	((l)->l_pflag |= LP_OWEUPC, setsoftast())
     86 #define	cpu_need_proftick(l)	((l)->l_pflag |= LP_OWEUPC, setsoftast())
     87 
     88 /*
     89  * Notify the current process (p) that it has a signal pending,
     90  * process as soon as possible.
     91  */
     92 #define	cpu_signotify(l)	setsoftast()
     93 
     94 extern int astpending;		/* need trap before returning to user mode */
     95 #define setsoftast()		(astpending = 1)
     96 
     97 /*
     98  * The rest of this should probably be moved to ../amiga/amigacpu.h,
     99  * although some of it could probably be put into generic 68k headers.
    100  */
    101 
    102 /* values for machineid (happen to be AFF_* settings of AttnFlags) */
    103 #define AMIGA_68020	(1L<<1)
    104 #define AMIGA_68030	(1L<<2)
    105 #define AMIGA_68040	(1L<<3)
    106 #define AMIGA_68881	(1L<<4)
    107 #define AMIGA_68882	(1L<<5)
    108 #define	AMIGA_FPU40	(1L<<6)
    109 #define AMIGA_68060	(1L<<7)
    110 
    111 extern int machineid;
    112 
    113 /*
    114  * Prototypes from amiga_init.c
    115  */
    116 void	*alloc_z2mem(long);
    117 
    118 /*
    119  * Prototypes from autoconf.c
    120  */
    121 int	is_a600(void);
    122 int	is_a1200(void);
    123 int	is_a3000(void);
    124 int	is_a4000(void);
    125 #ifdef DRACO
    126 #define	is_draco() ((machineid >> 24) == 0x7d ? (machineid >> 16) & 0xff : 0)
    127 #endif
    128 
    129 #ifdef DRACO
    130 /*
    131  * Prototypes from kbd.c
    132  */
    133 void	drkbdintr(void);
    134 
    135 /*
    136  * Prototypes from drsc.c
    137  */
    138 void	drsc_handler(void);
    139 #endif
    140 
    141 /*
    142  * Prototypes from locore.s
    143  */
    144 void	clearseg(vm_offset_t);
    145 void	doboot(void) __attribute__((__noreturn__));
    146 void	physcopyseg(vm_offset_t, vm_offset_t);
    147 u_int	probeva(u_int, u_int);
    148 
    149 /*
    150  * Prototypes from machdep.c
    151  */
    152 int	badaddr(void *);
    153 int	badbaddr(void *);
    154 void	bootsync(void);
    155 
    156 /*
    157  * Prototypes from pmap.c:
    158  */
    159 void	pmap_bootstrap(vm_offset_t, vm_offset_t);
    160 
    161 #endif /* _KERNEL */
    162 
    163 /*
    164  * Reorder protection when accessing device registers.
    165  */
    166 #define amiga_membarrier()
    167 
    168 /*
    169  * Finish all bus operations and flush pipelines.
    170  */
    171 #define amiga_cpu_sync() __asm volatile ("nop")
    172 
    173 #endif /* !_MACHINE_CPU_H_ */
    174