1 /* $NetBSD: cpu.h,v 1.22 1997/03/20 16:21:10 gwr Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Gordon W. Ross 5 * Copyright (c) 1993 Adam Glass 6 * Copyright (c) 1988 University of Utah. 7 * Copyright (c) 1982, 1990 The Regents of the University of California. 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * the Systems Programming Group of the University of Utah Computer 12 * Science Department. 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 * from: Utah Hdr: cpu.h 1.16 91/03/25 43 * from: @(#)cpu.h 7.7 (Berkeley) 6/27/91 44 * cpu.h,v 1.2 1993/05/22 07:58:17 cgd Exp 45 */ 46 47 #ifndef _CPU_H_ 48 #define _CPU_H_ 49 50 #ifdef _KERNEL 51 52 /* 53 * External definitions unique to sun3/68k cpu support. 54 * These are the "public" declarations - those needed in 55 * machine-independent source code. The "priviate" ones 56 * are in machdep.h (used only inside sys/arch/sun3). 57 * 58 * Note that the name of this file is NOT meant to imply 59 * that it has anything to do with mc68020 CPU stuff. 60 * The name "cpu" is historical, and used in the common 61 * code to identify machine-dependent functions, etc. 62 */ 63 64 /* 65 * definitions of cpu-dependent requirements 66 * referenced in generic code 67 */ 68 #define cpu_wait(p) /* nothing */ 69 70 /* 71 * Arguments to hardclock and gatherstats encapsulate the previous 72 * machine state in an opaque clockframe. One the sun3, we use 73 * what the locore.s glue puts on the stack before calling C-code. 74 */ 75 struct clockframe { 76 u_int cf_regs[4]; /* d0,d1,a0,a1 */ 77 u_short cf_sr; /* sr at time of interrupt */ 78 u_long cf_pc; /* pc at time of interrupt */ 79 u_short cf_vo; /* vector offset (4-word frame) */ 80 }; 81 82 #define CLKF_USERMODE(framep) (((framep)->cf_sr & PSL_S) == 0) 83 #define CLKF_BASEPRI(framep) (((framep)->cf_sr & PSL_IPL) == 0) 84 #define CLKF_PC(framep) ((framep)->cf_pc) 85 #if 0 86 /* We would like to do it this way... */ 87 #define CLKF_INTR(framep) (((framep)->cf_sr & PSL_M) == 0) 88 #else 89 /* but until we start using PSL_M, we have to do this instead */ 90 #define CLKF_INTR(framep) (0) /* XXX */ 91 #endif 92 93 extern int astpending; /* need to trap before returning to user mode */ 94 #define aston() (astpending = 1) 95 96 /* 97 * Preempt the current process if in interrupt from user mode, 98 * or after the current trap/syscall if in system mode. 99 */ 100 extern int want_resched; /* resched() was called */ 101 #define need_resched() { want_resched = 1; aston(); } 102 103 /* 104 * Give a profiling tick to the current process when the user profiling 105 * buffer pages are invalid. On the sun3, request an ast to send us 106 * through trap, marking the proc as needing a profiling tick. 107 */ 108 #define need_proftick(p) ((p)->p_flag |= P_OWEUPC, aston()) 109 110 /* 111 * Notify the current process (p) that it has a signal pending, 112 * process as soon as possible. 113 */ 114 #define signotify(p) aston() 115 116 /* 117 * Software Interrupt Register (SIR) 118 * The sun3 has a real software interrupt register set by 119 * isr_soft_request() so this scheme just multiplexes four 120 * software interrupt `sources' on the level one handler. 121 */ 122 extern void isr_soft_request __P((int level)); 123 union sun3sir { 124 int sir_any; 125 char sir_which[4]; 126 } sun3sir; 127 128 #define SIR_NET 0 129 #define SIR_CLOCK 1 130 #define SIR_SPARE2 2 131 #define SIR_SPARE3 3 132 133 #define setsoftint(x) isr_soft_request(x) 134 #define setsoftnet() (sun3sir.sir_which[SIR_NET] = 1, setsoftint(1)) 135 #define setsoftclock() (sun3sir.sir_which[SIR_CLOCK] = 1, setsoftint(1)) 136 137 #endif /* _KERNEL */ 138 139 #include <m68k/sysctl.h> 140 #endif /* _CPU_H_ */ 141