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cpu.h revision 1.31
      1 /* $NetBSD: cpu.h,v 1.31 1999/08/10 21:08:05 thorpej 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 #define	cpu_number()		alpha_pal_whami()
     60 
     61 /*
     62  * Arguments to hardclock and gatherstats encapsulate the previous
     63  * machine state in an opaque clockframe.  One the Alpha, we use
     64  * what we push on an interrupt (a trapframe).
     65  */
     66 struct clockframe {
     67 	struct trapframe	cf_tf;
     68 };
     69 #define	CLKF_USERMODE(framep)						\
     70 	(((framep)->cf_tf.tf_regs[FRAME_PS] & ALPHA_PSL_USERMODE) != 0)
     71 #define	CLKF_BASEPRI(framep)						\
     72 	(((framep)->cf_tf.tf_regs[FRAME_PS] & ALPHA_PSL_IPL_MASK) == 0)
     73 #define	CLKF_PC(framep)		((framep)->cf_tf.tf_regs[FRAME_PC])
     74 /*
     75  * XXX No way to accurately tell if we were in interrupt mode before taking
     76  * clock interrupt.
     77  */
     78 #define	CLKF_INTR(framep)	(0)
     79 
     80 /*
     81  * Preempt the current process if in interrupt from user mode,
     82  * or after the current trap/syscall if in system mode.
     83  */
     84 #define	need_resched()	{ want_resched = 1; aston(); }
     85 
     86 /*
     87  * Give a profiling tick to the current process when the user profiling
     88  * buffer pages are invalid.  On the hp300, request an ast to send us
     89  * through trap, marking the proc as needing a profiling tick.
     90  */
     91 #define	need_proftick(p)	{ (p)->p_flag |= P_OWEUPC; aston(); }
     92 
     93 /*
     94  * Notify the current process (p) that it has a signal pending,
     95  * process as soon as possible.
     96  */
     97 #define	signotify(p)	aston()
     98 
     99 #define	aston()		(astpending = 1)
    100 
    101 #ifdef _KERNEL
    102 u_int64_t astpending;		/* need to trap before returning to user mode */
    103 u_int64_t want_resched;		/* resched() was called */
    104 #endif
    105 
    106 
    107 /*
    108  * CTL_MACHDEP definitions.
    109  */
    110 #define	CPU_CONSDEV		1	/* dev_t: console terminal device */
    111 #define	CPU_ROOT_DEVICE		2	/* string: root device name */
    112 #define	CPU_UNALIGNED_PRINT	3	/* int: print unaligned accesses */
    113 #define	CPU_UNALIGNED_FIX	4	/* int: fix unaligned accesses */
    114 #define	CPU_UNALIGNED_SIGBUS	5	/* int: SIGBUS unaligned accesses */
    115 #define	CPU_BOOTED_KERNEL	6	/* string: booted kernel name */
    116 #define	CPU_MAXID		7	/* 6 valid machdep IDs */
    117 
    118 #define	CTL_MACHDEP_NAMES { \
    119 	{ 0, 0 }, \
    120 	{ "console_device", CTLTYPE_STRUCT }, \
    121 	{ "root_device", CTLTYPE_STRING }, \
    122 	{ "unaligned_print", CTLTYPE_INT }, \
    123 	{ "unaligned_fix", CTLTYPE_INT }, \
    124 	{ "unaligned_sigbus", CTLTYPE_INT }, \
    125 	{ "booted_kernel", CTLTYPE_STRING }, \
    126 }
    127 
    128 #ifdef _KERNEL
    129 
    130 struct pcb;
    131 struct proc;
    132 struct reg;
    133 struct rpb;
    134 struct trapframe;
    135 
    136 extern int cold;
    137 
    138 int	badaddr	__P((void *, size_t));
    139 
    140 #endif /* _KERNEL */
    141 #endif /* _ALPHA_CPU_H_ */
    142