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 1.11 1993/09/11 00:16:40 jtc Exp $ 38 */ 39 40 /* 41 * Definitions unique to i386 cpu support. 42 */ 43 #include "machine/frame.h" 44 #include "machine/segments.h" 45 46 /* 47 * definitions of cpu-dependent requirements 48 * referenced in generic code 49 */ 50 #define COPY_SIGCODE /* copy sigcode above user stack in exec */ 51 52 #define cpu_exec(p) /* nothing */ 53 54 /* 55 * Arguments to hardclock, softclock and gatherstats 56 * encapsulate the previous machine state in an opaque 57 * clockframe; for now, use generic intrframe. 58 */ 59 typedef struct intrframe clockframe; 60 61 #define CLKF_USERMODE(framep) (ISPL((framep)->if_cs) == SEL_UPL) 62 #define CLKF_BASEPRI(framep) ((framep)->if_ppl == 0) 63 #define CLKF_PC(framep) ((framep)->if_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++; 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 profile_tick(p, framep) { (p)->p_flag |= SOWEUPC; 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() (astpending++) 85 86 int astpending; /* need to trap before returning to user mode */ 87 int want_resched; /* resched() was called */ 88 89 /* 90 * pull in #defines for kinds of processors 91 */ 92 #include "machine/cputypes.h" 93 94 struct cpu_nameclass { 95 char *cpu_name; 96 int cpu_class; 97 }; 98 99 #ifdef KERNEL 100 extern int cpu; 101 extern int cpu_class; 102 extern struct cpu_nameclass i386_cpus[]; 103 #endif 104