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cpu.h revision 1.14 
      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 1.14 1994/04/03 22:36:41 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 
     58 /*
     59  * Arguments to hardclock, softclock and gatherstats
     60  * encapsulate the previous machine state in an opaque
     61  * clockframe; for now, use generic intrframe.
     62  *
     63  * XXX intrframe has a lot of gunk we don't need.
     64  */
     65 typedef struct intrframe clockframe;
     66 
     67 #define	CLKF_USERMODE(framep)	(ISPL((framep)->if_cs) == SEL_UPL)
     68 #define	CLKF_BASEPRI(framep)	((framep)->if_ppl == 0)
     69 #define	CLKF_PC(framep)		((framep)->if_eip)
     70 #define	CLKF_INTR(framep)	(0)	/* XXX should have an interrupt stack */
     71 
     72 /*
     73  * Software interrupt request `register'.
     74  */
     75 int	sir;
     76 
     77 #define	SIR_AST		0
     78 #define	SIR_NET		1
     79 #define	SIR_CLOCK	2
     80 #define	SIR_COM		3
     81 
     82 #define	softintr(n)	(sir |= 1 << (n))
     83 #define	setsoftnet()	softintr(SIR_NET)
     84 #define	setsoftclock()	softintr(SIR_CLOCK)
     85 #define	setsoftcom()	softintr(SIR_COM)
     86 
     87 /*
     88  * Preempt the current process if in interrupt from user mode,
     89  * or after the current trap/syscall if in system mode.
     90  */
     91 int	want_resched;	/* resched() was called */
     92 #define	need_resched()	(want_resched = 1, softintr(SIR_AST))
     93 
     94 /*
     95  * Give a profiling tick to the current process when the user profiling
     96  * buffer pages are invalid.  On the i386, request an ast to send us
     97  * through trap(), marking the proc as needing a profiling tick.
     98  */
     99 #define	profile_tick(p, framep)	((p)->p_flag |= SOWEUPC, softintr(SIR_AST))
    100 #define	need_proftick(p)	((p)->p_flag |= SOWEUPC, softintr(SIR_AST))
    101 
    102 /*
    103  * Notify the current process (p) that it has a signal pending,
    104  * process as soon as possible.
    105  */
    106 #define	signotify(p)	softintr(SIR_AST)
    107 
    108 /*
    109  * pull in #defines for kinds of processors
    110  */
    111 #include "machine/cputypes.h"
    112 
    113 struct cpu_nameclass {
    114 	char *cpu_name;
    115 	int  cpu_class;
    116 };
    117 
    118 #ifdef KERNEL
    119 extern int cpu;
    120 extern int cpu_class;
    121 extern struct cpu_nameclass i386_cpus[];
    122 #endif
    123 
    124 #endif /* !_I386_CPU_H_ */
    125