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 * $FreeBSD$ 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 /* 63 * CTL_MACHDEP definitions. 64 */ 65 #define CPU_CONSDEV 1 /* dev_t: console terminal device */ 66 #define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */ 67 #define CPU_DISRTCSET 3 /* int: disable resettodr() call */ 68 #define CPU_BOOTINFO 4 /* struct: bootinfo */ 69 #define CPU_WALLCLOCK 5 /* int: indicates wall CMOS clock */ 70 #define CPU_MAXID 6 /* number of valid machdep ids */ 71 72 #define CTL_MACHDEP_NAMES { \ 73 { 0, 0 }, \ 74 { "console_device", CTLTYPE_STRUCT }, \ 75 { "adjkerntz", CTLTYPE_INT }, \ 76 { "disable_rtc_set", CTLTYPE_INT }, \ 77 { "bootinfo", CTLTYPE_STRUCT }, \ 78 { "wall_cmos_clock", CTLTYPE_INT }, \ 79 } 80 81 #ifdef _KERNEL 82 extern char btext[]; 83 extern char etext[]; 84 extern u_int tsc_present; 85 86 void cpu_halt(void); 87 void cpu_reset(void); 88 void fork_trampoline(void); 89 void swi_vm(void *); 90 91 /* 92 * Return contents of in-cpu fast counter as a sort of "bogo-time" 93 * for random-harvesting purposes. 94 */ 95 static __inline u_int64_t 96 get_cyclecount(void) 97 { 98 #if defined(I486_CPU) || defined(KLD_MODULE) 99 struct bintime bt; 100 101 if (!tsc_present) { 102 binuptime(&bt); 103 return (bt.frac ^ bt.sec); 104 } 105 #endif 106 return (rdtsc()); 107 } 108 109 #endif 110 111 #endif /* !_MACHINE_CPU_H_ */ 112