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cpu.h revision 1.9 
      1 /*	$NetBSD: cpu.h,v 1.9 1996/07/09 00:33:20 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1982, 1990, 1993
      6  *	The Regents of the University of California.  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. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *	This product includes software developed by the University of
     23  *	California, Berkeley and its contributors.
     24  * 4. Neither the name of the University nor the names of its contributors
     25  *    may be used to endorse or promote products derived from this software
     26  *    without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38  * SUCH DAMAGE.
     39  *
     40  * from: Utah $Hdr: cpu.h 1.16 91/03/25$
     41  *
     42  *	@(#)cpu.h	8.4 (Berkeley) 1/5/94
     43  */
     44 
     45 #ifndef _ALPHA_CPU_H_
     46 #define _ALPHA_CPU_H_
     47 
     48 /*
     49  * Exported definitions unique to Alpha cpu support.
     50  */
     51 
     52 #include <machine/frame.h>
     53 
     54 /*
     55  * definitions of cpu-dependent requirements
     56  * referenced in generic code
     57  */
     58 #define	cpu_wait(p)			/* nothing */
     59 
     60 /*
     61  * Arguments to hardclock and gatherstats encapsulate the previous
     62  * machine state in an opaque clockframe.  One the Alpha, we use
     63  * what we push on an interrupt (a trapframe).
     64  */
     65 struct clockframe {
     66 	struct trapframe	cf_tf;
     67 };
     68 #define	CLKF_USERMODE(framep)						\
     69 	(((framep)->cf_tf.tf_ps & ALPHA_PSL_USERMODE) != 0)
     70 #define	CLKF_BASEPRI(framep)						\
     71 	(((framep)->cf_tf.tf_ps & ALPHA_PSL_IPL_MASK) == 0)
     72 #define	CLKF_PC(framep)		((framep)->cf_tf.tf_pc)
     73 /*
     74  * XXX No way to accurately tell if we were in interrupt mode before taking
     75  * clock interrupt.
     76  */
     77 #define	CLKF_INTR(framep)	(0)
     78 
     79 /*
     80  * Preempt the current process if in interrupt from user mode,
     81  * or after the current trap/syscall if in system mode.
     82  */
     83 #define	need_resched()	{ want_resched = 1; aston(); }
     84 
     85 /*
     86  * Give a profiling tick to the current process when the user profiling
     87  * buffer pages are invalid.  On the hp300, request an ast to send us
     88  * through trap, marking the proc as needing a profiling tick.
     89  */
     90 #define	need_proftick(p)	{ (p)->p_flag |= P_OWEUPC; aston(); }
     91 
     92 /*
     93  * Notify the current process (p) that it has a signal pending,
     94  * process as soon as possible.
     95  */
     96 #define	signotify(p)	aston()
     97 
     98 #define	aston()		(astpending = 1)
     99 
    100 u_int64_t astpending;		/* need to trap before returning to user mode */
    101 u_int64_t want_resched;		/* resched() was called */
    102 
    103 
    104 /*
    105  * CTL_MACHDEP definitions.
    106  */
    107 #define	CPU_CONSDEV		1	/* dev_t: console terminal device */
    108 #define	CPU_ROOT_DEVICE		2	/* string: root device name */
    109 #define	CPU_MAXID		3	/* number of valid machdep ids */
    110 
    111 #define	CTL_MACHDEP_NAMES { \
    112 	{ 0, 0 }, \
    113 	{ "console_device", CTLTYPE_STRUCT }, \
    114 	{ "root_device", CTLTYPE_STRING }, \
    115 }
    116 
    117 #endif /* _ALPHA_CPU_H_ */
    118