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 * $FreeBSD$ 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/psl.h> 47 #include <machine/frame.h> 48 #include <machine/segments.h> 49 #include <machine/globals.h> 50 51 /* 52 * definitions of cpu-dependent requirements 53 * referenced in generic code 54 */ 55 #undef COPY_SIGCODE /* don't copy sigcode above user stack in exec */ 56 57 #define cpu_exec(p) /* nothing */ 58 #define cpu_swapin(p) /* nothing */ 59 #define cpu_getstack(p) ((p)->p_md.md_regs->tf_esp) 60 #define cpu_setstack(p, ap) ((p)->p_md.md_regs->tf_esp = (ap)) 61 62 #define TRAPF_USERMODE(framep) \ 63 ((ISPL((framep)->tf_cs) == SEL_UPL) || ((framep)->tf_eflags & PSL_VM)) 64 #define TRAPF_PC(framep) ((framep)->tf_eip) 65 66 #define CLKF_USERMODE(framep) \ 67 ((ISPL((framep)->cf_cs) == SEL_UPL) || ((framep)->cf_eflags & PSL_VM)) 68 69 #define CLKF_INTR(framep) (curproc->p_intr_nesting_level >= 2) 70 #define CLKF_PC(framep) ((framep)->cf_eip) 71 72 /* 73 * Arrange to handle pending profiling ticks before returning to user mode. 74 * 75 * XXX this is now poorly named and implemented. It used to handle only a 76 * single tick and the PS_OWEUPC flag served as a counter. Now there is a 77 * counter in the proc table and flag isn't really necessary. 78 */ 79 #define need_proftick(p) do { \ 80 mtx_lock_spin(&sched_lock); \ 81 (p)->p_sflag |= PS_OWEUPC; \ 82 aston(); \ 83 mtx_unlock_spin(&sched_lock); \ 84 } while (0) 85 86 /* 87 * CTL_MACHDEP definitions. 88 */ 89 #define CPU_CONSDEV 1 /* dev_t: console terminal device */ 90 #define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */ 91 #define CPU_DISRTCSET 3 /* int: disable resettodr() call */ 92 #define CPU_BOOTINFO 4 /* struct: bootinfo */ 93 #define CPU_WALLCLOCK 5 /* int: indicates wall CMOS clock */ 94 #define CPU_MAXID 6 /* number of valid machdep ids */ 95 96 #define CTL_MACHDEP_NAMES { \ 97 { 0, 0 }, \ 98 { "console_device", CTLTYPE_STRUCT }, \ 99 { "adjkerntz", CTLTYPE_INT }, \ 100 { "disable_rtc_set", CTLTYPE_INT }, \ 101 { "bootinfo", CTLTYPE_STRUCT }, \ 102 { "wall_cmos_clock", CTLTYPE_INT }, \ 103 } 104 105 #ifdef _KERNEL 106 extern char btext[]; 107 extern char etext[]; 108 109 void fork_trampoline __P((void)); 110 111 #if defined(I386_CPU) || defined(I486_CPU) 112 extern u_int tsc_present; 113 #endif 114 115 /* 116 * Return contents of in-cpu fast counter as a sort of "bogo-time" 117 * for non-critical timing. 118 */ 119 static __inline u_int64_t 120 get_cyclecount(void) 121 { 122 #if defined(I386_CPU) || defined(I486_CPU) 123 struct timespec tv; 124 125 if (!tsc_present) { 126 nanotime(&tv); 127 return (tv.tv_sec * (u_int64_t)1000000000 + tv.tv_nsec); 128 } 129 #endif 130 return (rdtsc()); 131 } 132 133 #endif 134 135 #endif /* !_MACHINE_CPU_H_ */ 136