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cpu.h revision 1.26 
      1 /*	$NetBSD: cpu.h,v 1.26 1995/04/21 21:56:01 mycroft Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * William Jolitz.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	@(#)cpu.h	5.4 (Berkeley) 5/9/91
     39  */
     40 
     41 #ifndef _I386_CPU_H_
     42 #define _I386_CPU_H_
     43 
     44 /*
     45  * Definitions unique to i386 cpu support.
     46  */
     47 #include <machine/psl.h>
     48 #include <machine/frame.h>
     49 #include <machine/segments.h>
     50 
     51 /*
     52  * definitions of cpu-dependent requirements
     53  * referenced in generic code
     54  */
     55 #define	COPY_SIGCODE	/* copy sigcode above user stack in exec */
     56 
     57 #define	cpu_exec(p)		/* nothing */
     58 #define	cpu_swapin(p)		/* nothing */
     59 #define	cpu_wait(p)		/* nothing */
     60 #define	cpu_set_init_frame(p,frame)	(p->p_md.md_regs = frame)
     61 
     62 /*
     63  * Arguments to hardclock, softclock and statclock
     64  * encapsulate the previous machine state in an opaque
     65  * clockframe; for now, use generic intrframe.
     66  *
     67  * XXX intrframe has a lot of gunk we don't need.
     68  */
     69 #define clockframe intrframe
     70 
     71 #define	CLKF_USERMODE(frame)	(ISPL((frame)->if_cs) == SEL_UPL)
     72 #define	CLKF_BASEPRI(frame)	((frame)->if_ppl == 0)
     73 #define	CLKF_PC(frame)		((frame)->if_eip)
     74 #define	CLKF_INTR(frame)	(0)	/* XXX should have an interrupt stack */
     75 
     76 /*
     77  * Preempt the current process if in interrupt from user mode,
     78  * or after the current trap/syscall if in system mode.
     79  */
     80 int	want_resched;		/* resched() was called */
     81 #define	need_resched()		(want_resched = 1, setsoftast())
     82 
     83 /*
     84  * Give a profiling tick to the current process when the user profiling
     85  * buffer pages are invalid.  On the i386, request an ast to send us
     86  * through trap(), marking the proc as needing a profiling tick.
     87  */
     88 #define	need_proftick(p)	((p)->p_flag |= P_OWEUPC, setsoftast())
     89 
     90 /*
     91  * Notify the current process (p) that it has a signal pending,
     92  * process as soon as possible.
     93  */
     94 #define	signotify(p)		setsoftast()
     95 
     96 /*
     97  * We need a machine-independent name for this.
     98  */
     99 #define	DELAY(x)		delay(x)
    100 
    101 /*
    102  * pull in #defines for kinds of processors
    103  */
    104 #include <machine/cputypes.h>
    105 
    106 struct cpu_nameclass {
    107 	char *cpu_name;
    108 	int  cpu_class;
    109 };
    110 
    111 #ifdef _KERNEL
    112 extern int cpu;
    113 extern int cpu_class;
    114 extern struct cpu_nameclass i386_cpus[];
    115 #endif
    116 
    117 /*
    118  * CTL_MACHDEP definitions.
    119  */
    120 #define	CPU_CONSDEV		1	/* dev_t: console terminal device */
    121 #define	CPU_MAXID		2	/* number of valid machdep ids */
    122 
    123 #define	CTL_MACHDEP_NAMES { \
    124 	{ 0, 0 }, \
    125 	{ "console_device", CTLTYPE_STRUCT }, \
    126 }
    127 
    128 #endif /* !_I386_CPU_H_ */
    129