1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * All advertising materials mentioning features or use of this software 10 * must display the following acknowledgement: 11 * This product includes software developed by the University of 12 * California, Lawrence Berkeley Laboratory. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * @(#)cpu.h 8.1 (Berkeley) 6/11/93 43 * 44 * from: Header: cpu.h,v 1.12 93/05/25 10:36:34 torek Exp (LBL) 45 * $Id: cpu.h,v 1.2 1993/10/11 02:28:25 deraadt Exp $ 46 */ 47 48 #ifndef _CPU_H_ 49 #define _CPU_H_ 50 51 /* 52 * CTL_MACHDEP definitinos. 53 */ 54 #define CPU_MAXID 1 /* no valid machdep ids */ 55 56 #define CTL_MACHDEP_NAMES { \ 57 { 0, 0 }, \ 58 } 59 60 #ifdef KERNEL 61 /* 62 * Exported definitions unique to SPARC cpu support. 63 */ 64 65 #include <machine/psl.h> 66 #include <sparc/sparc/intreg.h> 67 68 /* 69 * definitions of cpu-dependent requirements 70 * referenced in generic code 71 */ 72 #define COPY_SIGCODE /* copy sigcode above user stack in exec */ 73 74 #define cpu_exec(p) /* nothing */ 75 #define cpu_wait(p) /* nothing */ 76 77 /* 78 * Arguments to hardclock, softclock and gatherstats encapsulate the 79 * previous machine state in an opaque clockframe. The ipl is here 80 * as well for strayintr (see locore.s:interrupt and intr.c:strayintr). 81 * Note that CLKF_INTR is valid only if CLKF_USERMODE is false. 82 */ 83 struct clockframe { 84 u_int psr; /* psr before interrupt, excluding PSR_ET */ 85 u_int pc; /* pc at interrupt */ 86 u_int npc; /* npc at interrupt */ 87 u_int ipl; /* actual interrupt priority level */ 88 u_int fp; /* %fp at interrupt */ 89 }; 90 91 extern int eintstack[]; 92 #define enablertclock() /* TDR: delete this soon */ 93 94 #define CLKF_USERMODE(framep) (((framep)->psr & PSR_PS) == 0) 95 #define CLKF_BASEPRI(framep) (((framep)->psr & PSR_PIL) == 0) 96 #define CLKF_PC(framep) ((framep)->pc) 97 #define CLKF_INTR(framep) ((framep)->fp < (u_int)eintstack) 98 99 /* 100 * Software interrupt request `register'. 101 */ 102 union sir { 103 int sir_any; 104 char sir_which[4]; 105 } sir; 106 107 #define SIR_NET 0 108 #define SIR_CLOCK 1 109 110 #define setsoftint() ienab_bis(IE_L1) 111 #define setsoftnet() (sir.sir_which[SIR_NET] = 1, setsoftint()) 112 #define setsoftclock() (sir.sir_which[SIR_CLOCK] = 1, setsoftint()) 113 114 int want_ast; 115 116 /* 117 * Preempt the current process if in interrupt from user mode, 118 * or after the current trap/syscall if in system mode. 119 */ 120 int want_resched; /* resched() was called */ 121 #define need_resched() (want_resched = 1, want_ast = 1) 122 123 /* 124 * Give a profiling tick to the current process when the user profiling 125 * buffer pages are invalid. On the sparc, request an ast to send us 126 * through trap(), marking the proc as needing a profiling tick. 127 */ 128 #define need_proftick(p) ((p)->p_flag |= SOWEUPC, want_ast = 1) 129 130 /* 131 * Notify the current process (p) that it has a signal pending, 132 * process as soon as possible. 133 */ 134 #define signotify(p) (want_ast = 1) 135 136 /* 137 * Only one process may own the FPU state. 138 * 139 * XXX this must be per-cpu (eventually) 140 */ 141 struct proc *fpproc; /* FPU owner */ 142 int foundfpu; /* true => we have an FPU */ 143 144 /* 145 * Interrupt handler chains. Interrupt handlers should return 0 for 146 * ``not me'' or 1 (``I took care of it''). intr_establish() inserts a 147 * handler into the list. The handler is called with its (single) 148 * argument, or with a pointer to a clockframe if ih_arg is NULL. 149 */ 150 struct intrhand { 151 int (*ih_fun) __P((void *)); 152 void *ih_arg; 153 struct intrhand *ih_next; 154 } *intrhand[15]; 155 156 void intr_establish __P((int level, struct intrhand *)); 157 158 /* 159 * intr_fasttrap() is a lot like intr_establish, but is used for ``fast'' 160 * interrupt vectors (vectors that are not shared and are handled in the 161 * trap window). Such functions must be written in assembly. 162 */ 163 void intr_fasttrap __P((int level, void (*vec)(void))); 164 165 #endif /* KERNEL */ 166 #endif /* _CPU_H_ */ 167