cpu.h revision 1.23
1/* $NetBSD: cpu.h,v 1.23 2000/05/26 21:20:27 thorpej Exp $ */ 2 3/* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah $Hdr: cpu.h 1.16 91/03/25$ 41 * 42 * @(#)cpu.h 8.4 (Berkeley) 1/5/94 43 */ 44 45#ifndef _X68K_CPU_H_ 46#define _X68K_CPU_H_ 47 48/* 49 * Exported definitions unique to x68k/68k cpu support. 50 */ 51 52#if defined(_KERNEL) && !defined(_LKM) 53#include "opt_m680x0.h" 54#include "opt_lockdebug.h" 55#endif 56 57/* 58 * Get common m68k CPU definitions. 59 */ 60#include <m68k/cpu.h> 61#include <m68k/cacheops.h> 62#define M68K_MMU_MOTOROLA 63 64/* 65 * Get interrupt glue. 66 */ 67#include <machine/intr.h> 68 69#include <sys/sched.h> 70struct cpu_info { 71 struct schedstate_percpu ci_schedstate; /* scheduler state */ 72#if defined(DIAGNOSTIC) || defined(LOCKDEBUG) 73 u_long ci_spin_locks; /* # of spin locks held */ 74 u_long ci_simple_locks; /* # of simple locks held */ 75#endif 76}; 77 78#ifdef _KERNEL 79extern struct cpu_info cpu_info_store; 80 81#define curcpu() (&cpu_info_store) 82 83/* 84 * definitions of cpu-dependent requirements 85 * referenced in generic code 86 */ 87#define cpu_swapin(p) /* nothing */ 88#define cpu_wait(p) /* nothing */ 89#define cpu_swapout(p) /* nothing */ 90#define cpu_number() 0 91 92/* 93 * Arguments to hardclock and gatherstats encapsulate the previous 94 * machine state in an opaque clockframe. One the x68k, we use 95 * what the hardware pushes on an interrupt (frame format 0). 96 */ 97struct clockframe { 98 u_short sr; /* sr at time of interrupt */ 99 u_long pc; /* pc at time of interrupt */ 100 u_short vo; /* vector offset (4-word frame) */ 101}; 102 103#define CLKF_USERMODE(framep) (((framep)->sr & PSL_S) == 0) 104#define CLKF_BASEPRI(framep) (((framep)->sr & PSL_IPL) == 0) 105#define CLKF_PC(framep) ((framep)->pc) 106#if 0 107/* We would like to do it this way... */ 108#define CLKF_INTR(framep) (((framep)->sr & PSL_M) == 0) 109#else 110/* but until we start using PSL_M, we have to do this instead */ 111#define CLKF_INTR(framep) (0) /* XXX */ 112#endif 113 114 115/* 116 * Preempt the current process if in interrupt from user mode, 117 * or after the current trap/syscall if in system mode. 118 */ 119extern int want_resched; /* resched() was called */ 120#define need_resched() { want_resched++; aston(); } 121 122/* 123 * Give a profiling tick to the current process when the user profiling 124 * buffer pages are invalid. On the x68k, request an ast to send us 125 * through trap, marking the proc as needing a profiling tick. 126 */ 127#define need_proftick(p) { (p)->p_flag |= P_OWEUPC; aston(); } 128 129/* 130 * Notify the current process (p) that it has a signal pending, 131 * process as soon as possible. 132 */ 133#define signotify(p) aston() 134 135extern int astpending; /* need to trap before returning to user mode */ 136#define aston() (astpending++) 137 138#endif /* _KERNEL */ 139 140/* 141 * CTL_MACHDEP definitions. 142 */ 143#define CPU_CONSDEV 1 /* dev_t: console terminal device */ 144#define CPU_MAXID 2 /* number of valid machdep ids */ 145 146#define CTL_MACHDEP_NAMES { \ 147 { 0, 0 }, \ 148 { "console_device", CTLTYPE_STRUCT }, \ 149} 150 151/* 152 * The rest of this should probably be moved to <machine/x68kcpu.h> 153 * although some of it could probably be put into generic 68k headers. 154 */ 155 156#ifdef _KERNEL 157extern int machineid; 158extern char *intiolimit; 159 160/* autoconf.c functions */ 161void config_console __P((void)); 162 163/* fpu.c functions */ 164int fpu_probe __P((void)); 165 166/* machdep.c functions */ 167void dumpconf __P((void)); 168void dumpsys __P((void)); 169 170/* locore.s functions */ 171struct pcb; 172struct fpframe; 173int suline __P((caddr_t, caddr_t)); 174void savectx __P((struct pcb *)); 175void switch_exit __P((struct proc *)); 176void proc_trampoline __P((void)); 177void loadustp __P((int)); 178void m68881_save __P((struct fpframe *)); 179void m68881_restore __P((struct fpframe *)); 180 181/* machdep.c functions */ 182int badaddr __P((caddr_t)); 183int badbaddr __P((caddr_t)); 184 185/* sys_machdep.c functions */ 186int cachectl1 __P((unsigned long, vaddr_t, size_t, struct proc *)); 187int dma_cachectl __P((caddr_t, int)); 188 189/* vm_machdep.c functions */ 190void physaccess __P((caddr_t, caddr_t, int, int)); 191void physunaccess __P((caddr_t, int)); 192int kvtop __P((caddr_t)); 193 194/* trap.c functions */ 195void child_return __P((void *)); 196 197#endif 198 199/* physical memory sections */ 200#define INTIOBASE (0x00C00000) 201#define INTIOTOP (0x01000000) 202 203/* 204 * Internal IO space: 205 * 206 * Ranges from 0xC00000 to 0x1000000 (IIOMAPSIZE). 207 * 208 * Internal IO space is mapped in the kernel from ``IODEVbase'' to 209 * ``intiolimit'' (defined in locore.s). Since it is always mapped, 210 * conversion between physical and kernel virtual addresses is easy. 211 */ 212#define IIOPOFF(pa) ((int)(pa)-INTIOBASE) 213#define IIOMAPSIZE btoc(INTIOTOP-INTIOBASE) /* 4mb */ 214 215#endif /* _X68K_CPU_H_ */ 216