1 /* $NetBSD: cpu.h,v 1.62 2019/11/23 19:40:37 ad 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. 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: Utah $Hdr: cpu.h 1.16 91/03/25$ 37 * 38 * @(#)cpu.h 8.4 (Berkeley) 1/5/94 39 */ 40 41 #ifndef _X68K_CPU_H_ 42 #define _X68K_CPU_H_ 43 44 #if defined(_KERNEL_OPT) 45 #include "opt_m68k_arch.h" 46 #include "opt_lockdebug.h" 47 #endif 48 49 /* 50 * Get common m68k CPU definitions. 51 */ 52 #include <m68k/cpu.h> 53 54 #if defined(_KERNEL) 55 /* 56 * Exported definitions unique to x68k/68k cpu support. 57 */ 58 #define M68K_MMU_MOTOROLA 59 60 /* 61 * Get interrupt glue. 62 */ 63 #include <machine/intr.h> 64 65 /* 66 * Arguments to hardclock and gatherstats encapsulate the previous 67 * machine state in an opaque clockframe. On the x68k, we use 68 * what the hardware pushes on an interrupt (frame format 0). 69 */ 70 struct clockframe { 71 u_short sr; /* sr at time of interrupt */ 72 u_long pc; /* pc at time of interrupt */ 73 u_short vo; /* vector offset (4-word frame) */ 74 }; 75 76 #define CLKF_USERMODE(framep) (((framep)->sr & PSL_S) == 0) 77 #define CLKF_PC(framep) ((framep)->pc) 78 #if 0 79 /* We would like to do it this way... */ 80 #define CLKF_INTR(framep) (((framep)->sr & PSL_M) == 0) 81 #else 82 /* but until we start using PSL_M, we have to do this instead */ 83 #define CLKF_INTR(framep) (0) /* XXX */ 84 #endif 85 86 87 /* 88 * Preempt the current process if in interrupt from user mode, 89 * or after the current trap/syscall if in system mode. 90 */ 91 #define cpu_need_resched(ci,l,flags) do { \ 92 __USE(flags); \ 93 aston(); \ 94 } while (/*CONSTCOND*/0) 95 96 /* 97 * Give a profiling tick to the current process when the user profiling 98 * buffer pages are invalid. On the x68k, request an ast to send us 99 * through trap, marking the proc as needing a profiling tick. 100 */ 101 #define cpu_need_proftick(l) \ 102 do { (l)->l_pflag |= LP_OWEUPC; aston(); } while (/* CONSTCOND */ 0) 103 104 /* 105 * Notify the current process (p) that it has a signal pending, 106 * process as soon as possible. 107 */ 108 #define cpu_signotify(l) aston() 109 110 extern int astpending; /* need to trap before returning to user mode */ 111 #define aston() (astpending++) 112 113 /* 114 * The rest of this should probably be moved to <machine/x68kcpu.h> 115 * although some of it could probably be put into generic 68k headers. 116 */ 117 118 extern uint8_t *intiobase; 119 extern uint8_t *intiolimit; 120 121 /* machdep.c functions */ 122 void dumpsys(void); 123 124 /* locore.s functions */ 125 void loadustp(int); 126 127 /* machdep.c functions */ 128 int badaddr(volatile void*); 129 int badbaddr(volatile void*); 130 131 #endif 132 133 /* physical memory sections */ 134 #define INTIOBASE (0x00C00000) 135 #define INTIOTOP (0x01000000) 136 137 /* 138 * Internal IO space: 139 * 140 * Ranges from 0xC00000 to 0x1000000 (IIOMAPSIZE). 141 * 142 * Internal IO space is mapped in the kernel from ``IODEVbase'' to 143 * ``intiolimit'' (defined in locore.s). Since it is always mapped, 144 * conversion between physical and kernel virtual addresses is easy. 145 */ 146 #define IIOV(pa) ((u_int)(pa) - INTIOBASE + (u_int)intiobase) 147 #define IIOP(va) ((u_int)(va) - (u_int)intiobase + INTIOBASE) 148 #define IIOPOFF(pa) ((int)(pa)-INTIOBASE) 149 #define IIOMAPSIZE btoc(INTIOTOP-INTIOBASE) /* 4mb */ 150 151 #endif /* _X68K_CPU_H_ */ 152