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. 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: src/sys/i386/include/cpu.h,v 1.43.2.2 2001/06/15 09:37:57 scottl Exp $ 34 */ 35 36 #ifndef _CPU_CPU_H_ 37 #define _CPU_CPU_H_ 38 39 /* 40 * Definitions unique to x86_64 cpu support. 41 */ 42 #ifndef _CPU_PSL_H_ 43 #include <machine/psl.h> 44 #endif 45 #ifndef _CPU_FRAME_H_ 46 #include <machine/frame.h> 47 #endif 48 #ifndef _CPU_SEGMENTS_H_ 49 #include <machine/segments.h> 50 #endif 51 52 /* 53 * definitions of cpu-dependent requirements 54 * referenced in generic code 55 */ 56 57 #define cpu_exec(p) /* nothing */ 58 #define cpu_swapin(p) /* nothing */ 59 #define cpu_setstack(lp, ap) ((lp)->lwp_md.md_regs[SP] = (ap)) 60 61 #define CLKF_INTR(intr_nest) ((intr_nest) > 1) 62 #define CLKF_INTR_TD(td) ((td)->td_flags & TDF_INTTHREAD) 63 #define CLKF_PC(framep) ((framep)->if_rip) 64 65 /* 66 * Preempt the current process if in interrupt from user mode, 67 * or after the current trap/syscall if in system mode. 68 * 69 * We do not have to use a locked bus cycle but we do have to use an 70 * atomic instruction because an interrupt on the local cpu can modify 71 * the gd_reqflags field. 72 */ 73 #define need_lwkt_resched() \ 74 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_LWKT_RESCHED) 75 #define need_user_resched() \ 76 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_USER_RESCHED) 77 #define need_proftick() \ 78 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_OWEUPC) 79 #define need_ipiq() \ 80 atomic_set_int(&mycpu->gd_reqflags, RQF_IPIQ) 81 #define signotify() \ 82 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_SIGNAL) 83 #define clear_user_resched() \ 84 atomic_clear_int(&mycpu->gd_reqflags, RQF_AST_USER_RESCHED) 85 #define clear_lwkt_resched() \ 86 atomic_clear_int(&mycpu->gd_reqflags, RQF_AST_LWKT_RESCHED) 87 #define clear_quickret() \ 88 atomic_clear_int(&mycpu->gd_reqflags, RQF_QUICKRET) 89 #define user_resched_wanted() \ 90 (mycpu->gd_reqflags & RQF_AST_USER_RESCHED) 91 #define lwkt_resched_wanted() \ 92 (mycpu->gd_reqflags & RQF_AST_LWKT_RESCHED) 93 #define any_resched_wanted() \ 94 (mycpu->gd_reqflags & (RQF_AST_LWKT_RESCHED|RQF_AST_USER_RESCHED)) 95 96 /* 97 * CTL_MACHDEP definitions. 98 */ 99 #define CPU_CONSDEV 1 /* cdev_t: console terminal device */ 100 #define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */ 101 #define CPU_DISRTCSET 3 /* int: disable resettodr() call */ 102 #define CPU_BOOTINFO 4 /* struct: bootinfo */ 103 #define CPU_WALLCLOCK 5 /* int: indicates wall CMOS clock */ 104 #define CPU_MAXID 6 /* number of valid machdep ids */ 105 106 #define CTL_MACHDEP_NAMES { \ 107 { 0, 0 }, \ 108 { "console_device", CTLTYPE_STRUCT }, \ 109 { "adjkerntz", CTLTYPE_INT }, \ 110 { "disable_rtc_set", CTLTYPE_INT }, \ 111 { "bootinfo", CTLTYPE_STRUCT }, \ 112 { "wall_cmos_clock", CTLTYPE_INT }, \ 113 } 114 115 #ifdef _KERNEL 116 117 struct lwp; 118 119 extern char btext[]; 120 extern char etext[]; 121 122 void fork_trampoline (void); 123 void generic_lwp_return (struct lwp *, struct trapframe *); 124 void fork_return (struct lwp *, struct trapframe *); 125 126 #endif 127 128 #endif /* !_CPU_CPU_H_ */ 129