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cpu.h revision 1.31 
      1 /*	$NetBSD: cpu.h,v 1.31 2002/10/20 02:37:34 chs Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994 Gordon W. Ross
      5  * Copyright (c) 1993 Adam Glass
      6  * Copyright (c) 1988 University of Utah.
      7  * Copyright (c) 1982, 1990 The Regents of the University of California.
      8  * All rights reserved.
      9  *
     10  * This code is derived from software contributed to Berkeley by
     11  * the Systems Programming Group of the University of Utah Computer
     12  * Science Department.
     13  *
     14  * Redistribution and use in source and binary forms, with or without
     15  * modification, are permitted provided that the following conditions
     16  * are met:
     17  * 1. Redistributions of source code must retain the above copyright
     18  *    notice, this list of conditions and the following disclaimer.
     19  * 2. Redistributions in binary form must reproduce the above copyright
     20  *    notice, this list of conditions and the following disclaimer in the
     21  *    documentation and/or other materials provided with the distribution.
     22  * 3. All advertising materials mentioning features or use of this software
     23  *    must display the following acknowledgement:
     24  *	This product includes software developed by the University of
     25  *	California, Berkeley and its contributors.
     26  * 4. Neither the name of the University nor the names of its contributors
     27  *    may be used to endorse or promote products derived from this software
     28  *    without specific prior written permission.
     29  *
     30  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     31  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     33  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     34  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     35  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     36  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     37  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     38  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     39  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     40  * SUCH DAMAGE.
     41  *
     42  *	from: Utah Hdr: cpu.h 1.16 91/03/25
     43  *	from: @(#)cpu.h	7.7 (Berkeley) 6/27/91
     44  *	cpu.h,v 1.2 1993/05/22 07:58:17 cgd Exp
     45  */
     46 
     47 #ifndef _CPU_H_
     48 #define _CPU_H_
     49 
     50 #if defined(_KERNEL_OPT)
     51 #include "opt_lockdebug.h"
     52 #endif
     53 
     54 /*
     55  * Get common m68k CPU definitions.
     56  */
     57 #include <m68k/cpu.h>
     58 
     59 #ifdef _KERNEL
     60 
     61 /*
     62  * External definitions unique to sun3/68k cpu support.
     63  * These are the "public" declarations - those needed in
     64  * machine-independent source code.  The "priviate" ones
     65  * are in machdep.h (used only inside sys/arch/sun3).
     66  *
     67  * Note that the name of this file is NOT meant to imply
     68  * that it has anything to do with mc68020 CPU stuff.
     69  * The name "cpu" is historical, and used in the common
     70  * code to identify machine-dependent functions, etc.
     71  */
     72 
     73 #include <sys/sched.h>
     74 struct cpu_info {
     75 	struct schedstate_percpu ci_schedstate; /* scheduler state */
     76 #if defined(DIAGNOSTIC) || defined(LOCKDEBUG)
     77 	u_long ci_spin_locks;		/* # of spin locks held */
     78 	u_long ci_simple_locks;		/* # of simple locks held */
     79 #endif
     80 };
     81 
     82 extern struct cpu_info cpu_info_store;
     83 
     84 #define	curcpu()			(&cpu_info_store)
     85 
     86 /*
     87  * definitions of cpu-dependent requirements
     88  * referenced in generic code
     89  */
     90 #define	cpu_number()			0
     91 #define	cpu_wait(p)			/* nothing */
     92 #define	cpu_swapin(p)			/* nothing */
     93 #define	cpu_swapout(p)			/* nothing */
     94 
     95 /*
     96  * Arguments to hardclock and gatherstats encapsulate the previous
     97  * machine state in an opaque clockframe.  One the sun3, we use
     98  * what the locore.s glue puts on the stack before calling C-code.
     99  */
    100 struct clockframe {
    101 	u_int	cf_regs[4];	/* d0,d1,a0,a1 */
    102 	u_short	cf_sr;		/* sr at time of interrupt */
    103 	u_long	cf_pc;		/* pc at time of interrupt */
    104 	u_short	cf_vo;		/* vector offset (4-word frame) */
    105 } __attribute__((packed));
    106 
    107 #define	CLKF_USERMODE(framep)	(((framep)->cf_sr & PSL_S) == 0)
    108 #define	CLKF_BASEPRI(framep)	(((framep)->cf_sr & PSL_IPL) == 0)
    109 #define	CLKF_PC(framep)		((framep)->cf_pc)
    110 #if 0
    111 /* We would like to do it this way... */
    112 #define	CLKF_INTR(framep)	(((framep)->cf_sr & PSL_M) == 0)
    113 #else
    114 /* but until we start using PSL_M, we have to do this instead */
    115 #define	CLKF_INTR(framep)	(0)	/* XXX */
    116 #endif
    117 
    118 extern int astpending;	 /* need to trap before returning to user mode */
    119 #define aston() (astpending = 1)
    120 
    121 /*
    122  * Preempt the current process if in interrupt from user mode,
    123  * or after the current trap/syscall if in system mode.
    124  */
    125 extern int want_resched;	 /* resched() was called */
    126 #define	need_resched(ci)	{ want_resched = 1; aston(); }
    127 
    128 /*
    129  * Give a profiling tick to the current process when the user profiling
    130  * buffer pages are invalid.  On the sun3, request an ast to send us
    131  * through trap, marking the proc as needing a profiling tick.
    132  */
    133 #define	need_proftick(p)	((p)->p_flag |= P_OWEUPC, aston())
    134 
    135 /*
    136  * Notify the current process (p) that it has a signal pending,
    137  * process as soon as possible.
    138  */
    139 #define	signotify(p)	aston()
    140 
    141 /*
    142  * Software Interrupt Register (SIR)
    143  * The sun3 has a real software interrupt register set by
    144  * isr_soft_request() so this scheme just multiplexes four
    145  * software interrupt `sources' on the level one handler.
    146  */
    147 extern void isr_soft_request __P((int level));
    148 union sun3sir {
    149 	int 	sir_any;
    150 	char	sir_which[4];
    151 };
    152 
    153 #ifdef _KERNEL
    154 extern union sun3sir sun3sir;
    155 #endif
    156 
    157 #define SIR_NET  	0
    158 #define SIR_CLOCK	1
    159 #define SIR_SPARE2	2
    160 #define SIR_SPARE3	3
    161 
    162 #define	setsoftint(x)	isr_soft_request(x)
    163 #define setsoftnet()	(sun3sir.sir_which[SIR_NET] = 1, setsoftint(1))
    164 #define setsoftclock()	(sun3sir.sir_which[SIR_CLOCK] = 1, setsoftint(1))
    165 
    166 int	cachectl1 __P((unsigned long, vaddr_t, size_t, struct proc *));
    167 
    168 /*
    169  * functions here for lack of a better place.
    170  */
    171 struct pcb;
    172 void	proc_trampoline __P((void));
    173 void	savectx __P((struct pcb *));
    174 void	switch_exit __P((struct proc *));
    175 
    176 #ifdef _SUN3_
    177 #define M68K_VAC
    178 #endif
    179 
    180 #endif	/* _KERNEL */
    181 
    182 #include <m68k/sysctl.h>
    183 #endif /* _CPU_H_ */
    184