freebsd-nq/sys/i386/include/cpu.h

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1993-06-12 14:58:17 +00:00
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)cpu.h 5.4 (Berkeley) 5/9/91
*/
/*
* Definitions unique to i386 cpu support.
*/
#include "machine/frame.h"
#include "machine/segments.h"
/*
* definitions of cpu-dependent requirements
* referenced in generic code
*/
#undef COPY_SIGCODE /* don't copy sigcode above user stack in exec */
/*
* function vs. inline configuration;
* these are defined to get generic functions
* rather than inline or machine-dependent implementations
*/
#if 0
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#define NEED_MINMAX /* need {,i,l,ul}{min,max} functions */
#define NEED_FFS /* need ffs function */
#define NEED_BCMP /* need bcmp function */
#define NEED_STRLEN /* need strlen function */
#endif
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#define cpu_exec(p) /* nothing */
/*
* Arguments to hardclock, softclock and gatherstats
* encapsulate the previous machine state in an opaque
* clockframe; for now, use generic intrframe.
*/
typedef struct intrframe clockframe;
#define CLKF_USERMODE(framep) (ISPL((framep)->if_cs) == SEL_UPL)
#define CLKF_BASEPRI(framep) ((framep)->if_ppl == 0)
#define CLKF_PC(framep) ((framep)->if_eip)
#define resettodr() /* no todr to set */
/*
* Preempt the current process if in interrupt from user mode,
* or after the current trap/syscall if in system mode.
*/
#define need_resched() { want_resched++; aston(); }
/*
* Give a profiling tick to the current process from the softclock
* interrupt. On tahoe, request an ast to send us through trap(),
* marking the proc as needing a profiling tick.
*/
#define profile_tick(p, framep) { (p)->p_flag |= SOWEUPC; aston(); }
/*
* Notify the current process (p) that it has a signal pending,
* process as soon as possible.
*/
#define signotify(p) aston()
#define aston() (astpending++)
int astpending; /* need to trap before returning to user mode */
int want_resched; /* resched() was called */
/*
* Kinds of processor
*/
#define CPU_386SX 0
#define CPU_386 1
#define CPU_486SX 2
#define CPU_486 3
#define CPU_586 4