cpu.h revision 219672
168349Sobrien/*- 268349Sobrien * Copyright (c) 1990 The Regents of the University of California. 368349Sobrien * All rights reserved. 468349Sobrien * 568349Sobrien * This code is derived from software contributed to Berkeley by 668349Sobrien * William Jolitz. 768349Sobrien * 868349Sobrien * Redistribution and use in source and binary forms, with or without 968349Sobrien * modification, are permitted provided that the following conditions 1068349Sobrien * are met: 1168349Sobrien * 1. Redistributions of source code must retain the above copyright 1268349Sobrien * notice, this list of conditions and the following disclaimer. 1368349Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1468349Sobrien * notice, this list of conditions and the following disclaimer in the 1568349Sobrien * documentation and/or other materials provided with the distribution. 1668349Sobrien * 4. Neither the name of the University nor the names of its contributors 1768349Sobrien * may be used to endorse or promote products derived from this software 1868349Sobrien * without specific prior written permission. 1968349Sobrien * 2068349Sobrien * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2168349Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2268349Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2368349Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2468349Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2568349Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2668349Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2768349Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2868349Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2968349Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3068349Sobrien * SUCH DAMAGE. 3168349Sobrien * 3268349Sobrien * from: @(#)cpu.h 5.4 (Berkeley) 5/9/91 3368349Sobrien * $FreeBSD: head/sys/i386/include/cpu.h 219672 2011-03-15 17:14:26Z jkim $ 3468349Sobrien */ 3568349Sobrien 3668349Sobrien#ifndef _MACHINE_CPU_H_ 3768349Sobrien#define _MACHINE_CPU_H_ 3868349Sobrien 3968349Sobrien/* 4068349Sobrien * Definitions unique to i386 cpu support. 4168349Sobrien */ 4268349Sobrien#include <machine/psl.h> 4368349Sobrien#include <machine/frame.h> 4468349Sobrien#include <machine/segments.h> 4568349Sobrien 4668349Sobrien#define cpu_exec(p) /* nothing */ 4768349Sobrien#define cpu_swapin(p) /* nothing */ 4868349Sobrien#define cpu_getstack(td) ((td)->td_frame->tf_esp) 4968349Sobrien#define cpu_setstack(td, ap) ((td)->td_frame->tf_esp = (ap)) 5068349Sobrien#define cpu_spinwait() ia32_pause() 5168349Sobrien 5268349Sobrien#define TRAPF_USERMODE(framep) \ 5368349Sobrien ((ISPL((framep)->tf_cs) == SEL_UPL) || ((framep)->tf_eflags & PSL_VM)) 5468349Sobrien#define TRAPF_PC(framep) ((framep)->tf_eip) 5568349Sobrien 5668349Sobrien#ifdef _KERNEL 5768349Sobrienextern char btext[]; 5868349Sobrienextern char etext[]; 5968349Sobrienextern int tsc_present; 6068349Sobrien 6168349Sobrienvoid cpu_halt(void); 6268349Sobrienvoid cpu_reset(void); 6368349Sobrienvoid fork_trampoline(void); 6468349Sobrienvoid swi_vm(void *); 6568349Sobrien 6668349Sobrien/* 6768349Sobrien * Return contents of in-cpu fast counter as a sort of "bogo-time" 6868349Sobrien * for random-harvesting purposes. 6968349Sobrien */ 7068349Sobrienstatic __inline uint64_t 7168349Sobrienget_cyclecount(void) 7268349Sobrien{ 7368349Sobrien struct bintime bt; 7468349Sobrien 7568349Sobrien binuptime(&bt); 7668349Sobrien return ((uint64_t)bt.sec << 56 | bt.frac >> 8); 7768349Sobrien} 7868349Sobrien 7968349Sobrien#endif 8068349Sobrien 8168349Sobrien#endif /* !_MACHINE_CPU_H_ */ 8268349Sobrien