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 1.17 1994/11/26 09:27:58 phk 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) (intr_nesting_level >= 2) 62 #if 1 63 /* 64 * XXX splsoftclock() is very broken and barely worth fixing. It doesn't 65 * turn off the clock bit in imen or in the icu. (This is not a serious 66 * problem at 100 Hz but it is serious at 16000 Hz for pcaudio. softclock() 67 * can take more than 62.5 usec so clock interrupts are lost.) It doesn't 68 * check for pending interrupts being unmasked. clkintr() and Xintr0() 69 * assume that the ipl is high when hardclock() returns. Our SWI_AST 70 * handling is efficient enough that little is gained by calling 71 * softclock() directly. 72 */ 73 #define CLKF_BASEPRI(framep) (((framep)->cf_ppl & ~SWI_AST_MASK) == 0) 74 #else 75 #define CLKF_BASEPRI(framep) (0) 76 #endif 77 #define CLKF_PC(framep) ((framep)->cf_eip) 78 79 /* 80 * Preempt the current process if in interrupt from user mode, 81 * or after the current trap/syscall if in system mode. 82 */ 83 #define need_resched() { want_resched = 1; aston(); } 84 85 /* 86 * Give a profiling tick to the current process from the softclock 87 * interrupt. On tahoe, request an ast to send us through trap(), 88 * marking the proc as needing a profiling tick. 89 */ 90 #define need_proftick(p) { (p)->p_flag |= P_OWEUPC; aston(); } 91 92 /* 93 * Notify the current process (p) that it has a signal pending, 94 * process as soon as possible. 95 */ 96 #define signotify(p) aston() 97 98 #define aston() setsoftast() 99 #define astoff() 100 101 /* 102 * pull in #defines for kinds of processors 103 */ 104 #include <machine/cputypes.h> 105 106 struct cpu_nameclass { 107 char *cpu_name; 108 int cpu_class; 109 }; 110 111 /* 112 * CTL_MACHDEP definitions. 113 */ 114 #define CPU_CONSDEV 1 /* dev_t: console terminal device */ 115 #define CPU_ADJKERNTZ 2 /* int: timezone offset for resettodr() */ 116 #define CPU_DISRTCSET 3 /* int: disable resettodr() call */ 117 #define CPU_MAXID 4 /* number of valid machdep ids */ 118 119 #define CTL_MACHDEP_NAMES { \ 120 { 0, 0 }, \ 121 { "console_device", CTLTYPE_STRUCT }, \ 122 { "adjkerntz", CTLTYPE_INT }, \ 123 { "disable_rtc_set", CTLTYPE_INT }, \ 124 } 125 126 #ifdef KERNEL 127 extern int bootverbose; 128 extern int cpu; 129 extern int cpu_class; 130 extern u_char intr_nesting_level; 131 extern struct cpu_nameclass i386_cpus[]; 132 extern int want_resched; /* resched was called */ 133 134 int cpu_fork __P((struct proc *, struct proc *)); 135 #endif 136 137 #endif /* !_MACHINE_CPU_H_ */ 138