cpu.h revision 137784
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 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)cpu.h 5.4 (Berkeley) 5/9/91 33 * $FreeBSD: head/sys/i386/include/cpu.h 137784 2004-11-16 20:42:32Z jhb $ 34 */ 35 36#ifndef _MACHINE_CPU_H_ 37#define _MACHINE_CPU_H_ 38 39/* 40 * Definitions unique to i386 cpu support. 41 */ 42#include <machine/psl.h> 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#undef COPY_SIGCODE /* don't copy sigcode above user stack in exec */ 51 52#define cpu_exec(p) /* nothing */ 53#define cpu_swapin(p) /* nothing */ 54#define cpu_getstack(td) ((td)->td_frame->tf_esp) 55#define cpu_setstack(td, ap) ((td)->td_frame->tf_esp = (ap)) 56#define cpu_spinwait() ia32_pause() 57 58#define TRAPF_USERMODE(framep) \ 59 ((ISPL((framep)->tf_cs) == SEL_UPL) || ((framep)->tf_eflags & PSL_VM)) 60#define TRAPF_PC(framep) ((framep)->tf_eip) 61 62#define CLKF_USERMODE(framep) \ 63 ((ISPL((framep)->cf_cs) == SEL_UPL) || ((framep)->cf_eflags & PSL_VM)) 64#define CLKF_PC(framep) ((framep)->cf_eip) 65 66/* 67 * CTL_MACHDEP definitions. 68 */ 69#define CPU_CONSDEV 1 /* dev_t: console terminal device */ 70#define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */ 71#define CPU_DISRTCSET 3 /* int: disable resettodr() call */ 72#define CPU_BOOTINFO 4 /* struct: bootinfo */ 73#define CPU_WALLCLOCK 5 /* int: indicates wall CMOS clock */ 74#define CPU_MAXID 6 /* number of valid machdep ids */ 75 76#define CTL_MACHDEP_NAMES { \ 77 { 0, 0 }, \ 78 { "console_device", CTLTYPE_STRUCT }, \ 79 { "adjkerntz", CTLTYPE_INT }, \ 80 { "disable_rtc_set", CTLTYPE_INT }, \ 81 { "bootinfo", CTLTYPE_STRUCT }, \ 82 { "wall_cmos_clock", CTLTYPE_INT }, \ 83} 84 85#ifdef _KERNEL 86extern char btext[]; 87extern char etext[]; 88extern u_int tsc_present; 89 90void cpu_halt(void); 91void cpu_reset(void); 92void fork_trampoline(void); 93void swi_vm(void *); 94 95/* 96 * Return contents of in-cpu fast counter as a sort of "bogo-time" 97 * for random-harvesting purposes. 98 */ 99static __inline u_int64_t 100get_cyclecount(void) 101{ 102#if defined(I486_CPU) || defined(KLD_MODULE) 103 struct bintime bt; 104 105 if (!tsc_present) { 106 binuptime(&bt); 107 return (bt.frac ^ bt.sec); 108 } 109#endif 110 return (rdtsc()); 111} 112 113#endif 114 115#endif /* !_MACHINE_CPU_H_ */ 116