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cpu.h revision 1.2 
      1 /*
      2  * Copyright (c) 1994 Ludd, University of Lule}, Sweden
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *      This product includes software developed at Ludd, University of Lule}
     16  * 4. The name of the author may not be used to endorse or promote products
     17  *    derived from this software without specific prior written permission
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  *
     30  *	$Id: cpu.h,v 1.2 1994/10/08 15:43:54 ragge Exp $
     31  */
     32  /* All bugs are subject to removal without further notice */
     33 
     34 #include "cdefs.h"
     35 #include "vax/include/mtpr.h"
     36 
     37 #define enablertclock()
     38 
     39 #define setsoftclock()	mtpr(8,PR_SIRR)
     40 
     41 struct	cpu_dep {
     42 	int	(*cpu_loinit)();
     43 	int	(*cpu_clock)();
     44 	int	(*cpu_mem)();
     45 	int	(*cpu_config)();
     46 };
     47 
     48 struct clockframe {
     49         int     pc;
     50         int     ps;
     51 };
     52 
     53 struct cpuops {
     54 	int *nisse;
     55 	int (*cpu_memenable)();
     56 	int (*cpu_memerr)();
     57 	int (*cpu_mchk)();
     58 	int (*cpu_init)();
     59 };
     60 
     61 struct percpu {
     62 	int pc_cputype;
     63 	int pc_cpuspeed;
     64 	int pc_nioa;
     65 	struct iobus *pc_io;
     66 	struct cpuops *pc_ops;
     67 };
     68 
     69 struct clockops {
     70 	int (*p1)();
     71 	int (*p2)();
     72 	int (*p3)();
     73 };
     74 
     75 /*
     76  * Return timeofdayregister
     77  */
     78 
     79 #define todr()		mfpr(PR_TODR)
     80 /*
     81  * The following code are from the hp300 port/ragge.
     82  *      from: Utah Hdr: cpu.h 1.16 91/03/25
     83  *      from: @(#)cpu.h 7.7 (Berkeley) 6/27/91
     84  *      $Id: cpu.h,v 1.2 1994/10/08 15:43:54 ragge Exp $
     85  */
     86 /*
     87  * Preempt the current process if in interrupt from user mode,
     88  * or after the current trap/syscall if in system mode.
     89  */
     90 
     91 #define need_resched(){ \
     92 	want_resched++; \
     93 	mtpr(AST_OK,PR_ASTLVL); \
     94 	}
     95 
     96 /*
     97  * Give a profiling tick to the current process from the softclock
     98  * interrupt.  On hp300, request an ast to send us through trap(),
     99  * marking the proc as needing a profiling tick.
    100  */
    101 /* #define profile_tick(p, framep) { (p)->p_flag |= SOWEUPC; aston(); } */
    102 
    103 /*
    104  * Notify the current process (p) that it has a signal pending,
    105  * process as soon as possible.
    106  */
    107 
    108 #define signotify(p)     mtpr(AST_OK,PR_ASTLVL);
    109 
    110 /* extern	int     astpending;     /* need to trap before returning to user mode */
    111 extern	int     want_resched;   /* resched() was called */
    112 
    113