cpu.h revision 1.20
1/* $NetBSD: cpu.h,v 1.20 1999/09/23 15:24:34 minoura 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/* 53 * Get common m68k CPU definitions. 54 */ 55#include <m68k/cpu.h> 56#include <m68k/cacheops.h> 57#define M68K_MMU_MOTOROLA 58 59/* 60 * Get interrupt glue. 61 */ 62#include <machine/intr.h> 63 64/* 65 * definitions of cpu-dependent requirements 66 * referenced in generic code 67 */ 68#define cpu_swapin(p) /* nothing */ 69#define cpu_wait(p) /* nothing */ 70#define cpu_swapout(p) /* nothing */ 71#define cpu_number() 0 72 73/* 74 * Arguments to hardclock and gatherstats encapsulate the previous 75 * machine state in an opaque clockframe. One the x68k, we use 76 * what the hardware pushes on an interrupt (frame format 0). 77 */ 78struct clockframe { 79 u_short sr; /* sr at time of interrupt */ 80 u_long pc; /* pc at time of interrupt */ 81 u_short vo; /* vector offset (4-word frame) */ 82}; 83 84#define CLKF_USERMODE(framep) (((framep)->sr & PSL_S) == 0) 85#define CLKF_BASEPRI(framep) (((framep)->sr & PSL_IPL) == 0) 86#define CLKF_PC(framep) ((framep)->pc) 87#if 0 88/* We would like to do it this way... */ 89#define CLKF_INTR(framep) (((framep)->sr & PSL_M) == 0) 90#else 91/* but until we start using PSL_M, we have to do this instead */ 92#define CLKF_INTR(framep) (0) /* XXX */ 93#endif 94 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 */ 100extern int want_resched; /* resched() was called */ 101#define need_resched() { want_resched++; aston(); } 102 103/* 104 * Give a profiling tick to the current process when the user profiling 105 * buffer pages are invalid. On the x68k, 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 116extern int astpending; /* need to trap before returning to user mode */ 117#define aston() (astpending++) 118 119/* 120 * CTL_MACHDEP definitions. 121 */ 122#define CPU_CONSDEV 1 /* dev_t: console terminal device */ 123#define CPU_MAXID 2 /* number of valid machdep ids */ 124 125#define CTL_MACHDEP_NAMES { \ 126 { 0, 0 }, \ 127 { "console_device", CTLTYPE_STRUCT }, \ 128} 129 130/* 131 * The rest of this should probably be moved to <machine/x68kcpu.h> 132 * although some of it could probably be put into generic 68k headers. 133 */ 134 135#ifdef _KERNEL 136extern int machineid; 137extern char *intiolimit; 138 139/* autoconf.c functions */ 140void config_console __P((void)); 141 142/* fpu.c functions */ 143int fpu_probe __P((void)); 144 145/* machdep.c functions */ 146void dumpconf __P((void)); 147void dumpsys __P((void)); 148 149/* locore.s functions */ 150struct pcb; 151struct fpframe; 152int suline __P((caddr_t, caddr_t)); 153void savectx __P((struct pcb *)); 154void switch_exit __P((struct proc *)); 155void proc_trampoline __P((void)); 156void loadustp __P((int)); 157void m68881_save __P((struct fpframe *)); 158void m68881_restore __P((struct fpframe *)); 159 160/* machdep.c functions */ 161int badaddr __P((caddr_t)); 162int badbaddr __P((caddr_t)); 163 164/* sys_machdep.c functions */ 165int cachectl1 __P((unsigned long, vaddr_t, size_t, struct proc *)); 166int dma_cachectl __P((caddr_t, int)); 167 168/* vm_machdep.c functions */ 169void physaccess __P((caddr_t, caddr_t, int, int)); 170void physunaccess __P((caddr_t, int)); 171int kvtop __P((caddr_t)); 172 173/* trap.c functions */ 174void child_return __P((void *)); 175 176#endif 177 178/* physical memory sections */ 179#define INTIOBASE (0x00C00000) 180#define INTIOTOP (0x01000000) 181 182/* 183 * Internal IO space: 184 * 185 * Ranges from 0xC00000 to 0x1000000 (IIOMAPSIZE). 186 * 187 * Internal IO space is mapped in the kernel from ``IODEVbase'' to 188 * ``intiolimit'' (defined in locore.s). Since it is always mapped, 189 * conversion between physical and kernel virtual addresses is easy. 190 */ 191#define IIOPOFF(pa) ((int)(pa)-INTIOBASE) 192#define IIOMAPSIZE btoc(INTIOTOP-INTIOBASE) /* 4mb */ 193 194#endif /* _X68K_CPU_H_ */ 195