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: src/sys/i386/include/cpu.h,v 1.43.2.2 2001/06/15 09:37:57 scottl Exp $ 38 */ 39 40 #ifndef _CPU_CPU_H_ 41 #define _CPU_CPU_H_ 42 43 /* 44 * Definitions unique to x86_64 cpu support. 45 */ 46 #ifndef _CPU_PSL_H_ 47 #include <machine/psl.h> 48 #endif 49 #ifndef _CPU_FRAME_H_ 50 #include <machine/frame.h> 51 #endif 52 #ifndef _CPU_SEGMENTS_H_ 53 #include <machine/segments.h> 54 #endif 55 56 /* 57 * definitions of cpu-dependent requirements 58 * referenced in generic code 59 */ 60 61 #define cpu_exec(p) /* nothing */ 62 #define cpu_swapin(p) /* nothing */ 63 #define cpu_setstack(lp, ap) ((lp)->lwp_md.md_regs[SP] = (ap)) 64 65 #define CLKF_INTR(intr_nest) ((intr_nest) > 1) 66 #define CLKF_INTR_TD(td) ((td)->td_flags & TDF_INTTHREAD) 67 #define CLKF_PC(framep) ((framep)->if_rip) 68 69 /* 70 * Preempt the current process if in interrupt from user mode, 71 * or after the current trap/syscall if in system mode. 72 * 73 * We do not have to use a locked bus cycle but we do have to use an 74 * atomic instruction because an interrupt on the local cpu can modify 75 * the gd_reqflags field. 76 */ 77 #define need_lwkt_resched() \ 78 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_LWKT_RESCHED) 79 #define need_user_resched() \ 80 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_USER_RESCHED) 81 #define need_proftick() \ 82 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_OWEUPC) 83 #define need_ipiq() \ 84 atomic_set_int(&mycpu->gd_reqflags, RQF_IPIQ) 85 #define signotify() \ 86 atomic_set_int(&mycpu->gd_reqflags, RQF_AST_SIGNAL) 87 #define clear_user_resched() \ 88 atomic_clear_int(&mycpu->gd_reqflags, RQF_AST_USER_RESCHED) 89 #define clear_lwkt_resched() \ 90 atomic_clear_int(&mycpu->gd_reqflags, RQF_AST_LWKT_RESCHED) 91 #define clear_quickret() \ 92 atomic_clear_int(&mycpu->gd_reqflags, RQF_QUICKRET) 93 #define user_resched_wanted() \ 94 (mycpu->gd_reqflags & RQF_AST_USER_RESCHED) 95 #define lwkt_resched_wanted() \ 96 (mycpu->gd_reqflags & RQF_AST_LWKT_RESCHED) 97 #define any_resched_wanted() \ 98 (mycpu->gd_reqflags & (RQF_AST_LWKT_RESCHED|RQF_AST_USER_RESCHED)) 99 100 /* 101 * CTL_MACHDEP definitions. 102 */ 103 #define CPU_CONSDEV 1 /* cdev_t: console terminal device */ 104 #define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */ 105 #define CPU_DISRTCSET 3 /* int: disable resettodr() call */ 106 #define CPU_BOOTINFO 4 /* struct: bootinfo */ 107 #define CPU_WALLCLOCK 5 /* int: indicates wall CMOS clock */ 108 #define CPU_MAXID 6 /* number of valid machdep ids */ 109 110 #define CTL_MACHDEP_NAMES { \ 111 { 0, 0 }, \ 112 { "console_device", CTLTYPE_STRUCT }, \ 113 { "adjkerntz", CTLTYPE_INT }, \ 114 { "disable_rtc_set", CTLTYPE_INT }, \ 115 { "bootinfo", CTLTYPE_STRUCT }, \ 116 { "wall_cmos_clock", CTLTYPE_INT }, \ 117 } 118 119 #ifdef _KERNEL 120 121 struct lwp; 122 123 extern char btext[]; 124 extern char etext[]; 125 126 void fork_trampoline (void); 127 void generic_lwp_return (struct lwp *, struct trapframe *); 128 void fork_return (struct lwp *, struct trapframe *); 129 130 #endif 131 132 #endif /* !_CPU_CPU_H_ */ 133