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cpu.h revision 1.22 
      1 /*-
      2  * Copyright (c) 1990 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * William Jolitz.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	from: @(#)cpu.h	5.4 (Berkeley) 5/9/91
     37  *	$Id: cpu.h,v 1.22 1994/05/27 11:22:58 mycroft Exp $
     38  */
     39 
     40 #ifndef _I386_CPU_H_
     41 #define _I386_CPU_H_
     42 
     43 /*
     44  * Definitions unique to i386 cpu support.
     45  */
     46 #include <machine/psl.h>
     47 #include <machine/frame.h>
     48 #include <machine/segments.h>
     49 
     50 /*
     51  * definitions of cpu-dependent requirements
     52  * referenced in generic code
     53  */
     54 #define	COPY_SIGCODE	/* copy sigcode above user stack in exec */
     55 
     56 #define	cpu_exec(p)		/* nothing */
     57 #define	cpu_swapin(p)		/* nothing */
     58 #define	cpu_wait(p)		/* nothing */
     59 #define	cpu_set_init_frame(p,frame)	(p->p_md.md_regs = frame)
     60 
     61 /*
     62  * Arguments to hardclock, softclock and statclock
     63  * encapsulate the previous machine state in an opaque
     64  * clockframe; for now, use generic intrframe.
     65  *
     66  * XXX intrframe has a lot of gunk we don't need.
     67  */
     68 #define clockframe intrframe
     69 
     70 #define	CLKF_USERMODE(frame)	(ISPL((frame)->if_cs) == SEL_UPL)
     71 #define	CLKF_BASEPRI(frame)	((frame)->if_ppl == 0)
     72 #define	CLKF_PC(frame)		((frame)->if_eip)
     73 #define	CLKF_INTR(frame)	(0)	/* XXX should have an interrupt stack */
     74 
     75 /*
     76  * Preempt the current process if in interrupt from user mode,
     77  * or after the current trap/syscall if in system mode.
     78  */
     79 int	want_resched;	/* resched() was called */
     80 #define	need_resched()	(want_resched = 1, setsoftast())
     81 
     82 /*
     83  * Give a profiling tick to the current process when the user profiling
     84  * buffer pages are invalid.  On the i386, request an ast to send us
     85  * through trap(), marking the proc as needing a profiling tick.
     86  */
     87 #define	profile_tick(p, framep)	((p)->p_flag |= P_OWEUPC, setsoftast())
     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  * pull in #defines for kinds of processors
     98  */
     99 #include <machine/cputypes.h>
    100 
    101 struct cpu_nameclass {
    102 	char *cpu_name;
    103 	int  cpu_class;
    104 };
    105 
    106 #ifdef KERNEL
    107 extern int cpu;
    108 extern int cpu_class;
    109 extern struct cpu_nameclass i386_cpus[];
    110 #endif
    111 
    112 /*
    113  * CTL_MACHDEP definitions.
    114  */
    115 #define	CPU_CONSDEV		1	/* dev_t: console terminal device */
    116 #define	CPU_MAXID		2	/* number of valid machdep ids */
    117 
    118 #define	CTL_MACHDEP_NAMES { \
    119 	{ 0, 0 }, \
    120 	{ "console_device", CTLTYPE_STRUCT }, \
    121 }
    122 
    123 #endif /* !_I386_CPU_H_ */
    124