cpu.h revision 3682
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 1994/10/15 21:18:11 ache Exp $ 38 */ 39 40#ifndef _MACHINE_CPU_H_ 41#define _MACHINE_CPU_H_ 42 43/* 44 * Definitions unique to i386 cpu support. 45 */ 46#include <machine/frame.h> 47#include <machine/segments.h> 48 49/* 50 * definitions of cpu-dependent requirements 51 * referenced in generic code 52 */ 53#undef COPY_SIGCODE /* don't copy sigcode above user stack in exec */ 54 55#define cpu_exec(p) /* nothing */ 56#define cpu_swapin(p) /* nothing */ 57#define cpu_setstack(p, ap) (p)->p_md.md_regs = ap 58#define cpu_set_init_frame(p, fp) (p)->p_md.md_regs = fp 59 60#define CLKF_USERMODE(framep) (ISPL((framep)->cf_cs) == SEL_UPL) 61#define CLKF_INTR(framep) (0) 62#define CLKF_BASEPRI(framep) (((framep)->cf_ppl & ~SWI_AST_MASK) == 0) 63#define CLKF_PC(framep) ((framep)->cf_eip) 64 65/* 66 * Preempt the current process if in interrupt from user mode, 67 * or after the current trap/syscall if in system mode. 68 */ 69#define need_resched() { want_resched = 1; aston(); } 70 71/* 72 * Give a profiling tick to the current process from the softclock 73 * interrupt. On tahoe, request an ast to send us through trap(), 74 * marking the proc as needing a profiling tick. 75 */ 76#define need_proftick(p) { (p)->p_flag |= P_OWEUPC; aston(); } 77 78/* 79 * Notify the current process (p) that it has a signal pending, 80 * process as soon as possible. 81 */ 82#define signotify(p) aston() 83 84#define aston() setsoftast() 85#define astoff() 86 87/* 88 * pull in #defines for kinds of processors 89 */ 90#include <machine/cputypes.h> 91 92struct cpu_nameclass { 93 char *cpu_name; 94 int cpu_class; 95}; 96 97/* 98 * CTL_MACHDEP definitions. 99 */ 100#define CPU_CONSDEV 1 /* dev_t: console terminal device */ 101#define CPU_ADJKERNTZ 2 /* int: timezone offset for resettodr() */ 102#define CPU_DISRTCSET 3 /* int: disable resettodr() call */ 103#define CPU_MAXID 4 /* number of valid machdep ids */ 104 105#define CTL_MACHDEP_NAMES { \ 106 { 0, 0 }, \ 107 { "console_device", CTLTYPE_STRUCT }, \ 108 { "adjkerntz", CTLTYPE_INT }, \ 109 { "disable_rtc_set", CTLTYPE_INT }, \ 110} 111 112#ifdef KERNEL 113extern int want_resched; /* resched was called */ 114 115extern int cpu; 116extern int cpu_class; 117extern struct cpu_nameclass i386_cpus[]; 118int cpu_fork __P((struct proc *, struct proc *)); 119int npxdna __P((void)); 120void npxexit __P((struct proc *p)); 121void resettodr __P((void)); 122#endif 123 124#endif /* !_MACHINE_CPU_H_ */ 125