www.pudn.com > tcpipsim.rar > cpu.h, change:2005-09-07,size:4038b

/*- 
 * Copyright (c) 1990, 1993 
 *	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	8.4 (Berkeley) 1/5/94 
 */ 
 
/* 
 * Definitions unique to i386 cpu support. 
 */ 
#include  
#include  
 
/* 
 * definitions of cpu-dependent requirements 
 * referenced in generic code 
 */ 
#undef	COPY_SIGCODE	/* don't copy sigcode above user stack in exec */ 
 
#define	cpu_exec(p)			/* nothing */ 
#define	cpu_swapin(p)			/* nothing */ 
#define cpu_setstack(p, ap)		(p)->p_md.md_regs[SP] = ap 
#define cpu_set_init_frame(p, fp)	(p)->p_md.md_regs = fp 
 
/* 
 * Arguments to hardclock, softclock and gatherstats 
 * encapsulate the previous machine state in an opaque 
 * clockframe; for now, use generic intrframe. 
 */ 
struct clockframe { 
	struct intrframe	cf_if; 
}; 
 
#define	CLKF_USERMODE(framep)	(ISPL((framep)->cf_if.if_cs) == SEL_UPL) 
#define	CLKF_BASEPRI(framep)	((framep)->cf_if.if_ppl == 0) 
#define	CLKF_PC(framep)		((framep)->cf_if.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 |= P_OWEUPC; 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 
 
/* 
 * CTL_MACHDEP definitions. 
 */ 
#define	CPU_CONSDEV		1	/* dev_t: console terminal device */ 
#define	CPU_MAXID		2	/* number of valid machdep ids */ 
 
#define CTL_MACHDEP_NAMES { \ 
	{ 0, 0 }, \ 
	{ "console_device", CTLTYPE_STRUCT }, \ 
}