1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1982, 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: Utah $Hdr: cpu.h 1.16 91/03/25$ 39 * 40 * @(#)cpu.h 7.7 (Berkeley) 6/27/91 41 * $Id: cpu.h,v 1.12 1994/05/09 06:38:50 chopps Exp $ 42 */ 43 #ifndef _MACHINE_CPU_H_ 44 #define _MACHINE_CPU_H_ 45 46 /* 47 * Exported definitions unique to amiga/68k cpu support. 48 */ 49 50 /* 51 * definitions of cpu-dependent requirements 52 * referenced in generic code 53 */ 54 #define COPY_SIGCODE /* copy sigcode above user stack in exec */ 55 56 /* 57 * function vs. inline configuration; 58 * these are defined to get generic functions 59 * rather than inline or machine-dependent implementations 60 */ 61 #define NEED_MINMAX /* need {,i,l,ul}{min,max} functions */ 62 #undef NEED_FFS /* don't need ffs function */ 63 #undef NEED_BCMP /* don't need bcmp function */ 64 #undef NEED_STRLEN /* don't need strlen function */ 65 66 #define cpu_exec(p) /* nothing */ 67 #define cpu_wait(p) /* nothing */ 68 69 /* 70 * Arguments to hardclock, softclock and statclock 71 * encapsulate the previous machine state in an opaque 72 * clockframe; for hp300, use just what the hardware 73 * leaves on the stack. 74 * 75 * which is now in this format. note if m68k/frame.h 76 * changes this may need too also. 77 */ 78 struct clockframe { 79 int ps; 80 int pc; 81 }; 82 83 84 #define CLKF_USERMODE(framep) (((framep)->ps & PSL_S) == 0) 85 #define CLKF_BASEPRI(framep) (((framep)->ps & PSL_IPL7) == 0) 86 #define CLKF_PC(framep) ((framep)->pc) 87 #define CLKF_INTR(framep) (0) /* XXXX*/ 88 89 /* 90 * Preempt the current process if in interrupt from user mode, 91 * or after the current trap/syscall if in system mode. 92 */ 93 #define need_resched() {want_resched = 1; setsoftast();} 94 95 /* 96 * Give a profiling tick to the current process from the softclock 97 * interrupt. On hp300, request an ast to send us through trap(), 98 * marking the proc as needing a profiling tick. 99 */ 100 #define profile_tick(p, framep) ((p)->p_flag |= P_OWEUPC, setsoftast()) 101 #define need_proftick(p) ((p)->p_flag |= P_OWEUPC, setsoftast()) 102 103 /* 104 * Notify the current process (p) that it has a signal pending, 105 * process as soon as possible. 106 */ 107 #define signotify(p) setsoftast() 108 109 #define setsoftast() (astpending = 1) 110 111 int astpending; /* need trap before returning to user mode */ 112 int want_resched; /* resched() was called */ 113 114 /* 115 * simulated software interrupt register 116 */ 117 extern unsigned char ssir; 118 119 #define SIR_NET 0x1 120 #define SIR_CLOCK 0x2 121 122 #define siroff(x) ssir &= ~(x) 123 #define setsoftnet() ssir |= SIR_NET 124 #define setsoftclock() ssir |= SIR_CLOCK 125 126 127 /* 128 * The rest of this should probably be moved to ../amiga/amigacpu.h, 129 * although some of it could probably be put into generic 68k headers. 130 */ 131 132 /* values for machineid (happen to be AFF_* settings of AttnFlags) 133 * NOTE: '40 support does exist! */ 134 #define AMIGA_68020 (1L<<1) 135 #define AMIGA_68030 (1L<<2) 136 #define AMIGA_68040 (1L<<3) 137 #define AMIGA_68881 (1L<<4) 138 #define AMIGA_68882 (1L<<5) 139 #define AMIGA_FPU40 (1L<<6) 140 141 142 /* values for mmutype (assigned for quick testing) */ 143 #define MMU_68030 -1 /* 68030 on-chip subset of 68851 */ 144 #define MMU_68851 1 /* Motorola 68851 */ 145 #define MMU_68040 0 /* 68040 on-chip subsubset */ 146 147 /* values for cpuspeed (not really related to clock speed due to caches) */ 148 #define MHZ_8 1 149 #define MHZ_16 2 150 #define MHZ_25 3 151 #define MHZ_33 4 152 #define MHZ_50 6 153 154 #ifdef KERNEL 155 extern int machineid, mmutype, cpu040; 156 157 /* what is this supposed to do? i.e. how is it different than startrtclock? 158 #define enablertclock() 159 160 Answer (MW): startrtclock is supposed to start the clock chip (to get an 161 accurate uptime, enablertclock is called later (after *vital* stuff 162 has been setup) to enable clock interrupts. Enabling clock interrupts 163 at startrtclock-time can get you into big troubles... */ 164 165 #endif 166 167 /* physical memory sections */ 168 #define CHIPMEMBASE (0x00000000) 169 /* maximum for mapping, not the whole range is needed in physical equivalence */ 170 #define CHIPMEMTOP (0x00200000) 171 #define CHIPMEMSIZE btoc(CHIPMEMTOP-CHIPMEMBASE) 172 /* CIA-A and CIA-B */ 173 #define CIABASE (0x00BFC000) 174 #define CIATOP (0x00C00000) 175 #define CIASIZE btoc(CIATOP-CIABASE) 176 #if 0 177 #define CUSTOMBASE (0x00DFE000) 178 #define CUSTOMTOP (0x00E00000) 179 #define CUSTOMSIZE btoc(CUSTOMTOP-CUSTOMBASE) 180 #ifdef A3000 181 #define SCSIBASE (0x00DD0000) 182 #define SCSITOP (0x00DD0000+AMIGA_PAGE_SIZE) 183 #define SCSISIZE btoc(SCSITOP-SCSIBASE) 184 #endif 185 #else 186 /* zorro2 really starts at 0x00E00000, but starting mapping at D8 also 187 includes the clock and scsi space on the A3000, as well as the 188 normal custom chip area on any amiga. That's nice :-)) */ 189 #define CUSTOMBASE (0x00DFF000) /* now just offset rel to zorro2 */ 190 #endif 191 192 /* XXX only correct for A3000 memory map! 193 * corresponds to address of last physical memory page, for A3000 194 * this is always 0x08000000 - pagesize (== NBPS) 195 */ 196 #define MAXADDR (0x08000000 - UPAGES) 197 198 199 #if 0 200 /* these are not used, verbatim from hp300, but not used :-)) */ 201 202 /* Amiga specific mappings: 203 * 204 * phys-start map-start phys-end map-end name 205 * 206 * 0x00000000 chipmembase - 0x00200000 chipmemlimit CHIP MEM 207 * 0x00be0000 ciabase - 0x00c00000 cialimit CIA-B/CIA-A 208 * 0x00d80000 customchipbase - 0x00f00000 customchiplimit CUSTOM/ZTWO 209 */ 210 #define ISCHIPMEM(va) \ 211 ((char *)(va) >= chipmembase && (char *)(va) < chipmemlimit) 212 #define CHIPMEMV(pa) ((int)(pa)-CHIPMEMBASE+(int)chipmembase) 213 #define CHIPMEMP(va) ((int)(va)-(int)chipmembase+CHIPMEMBASE) 214 #define CHIPMEMPOFF(pa) ((int)(pa)-CHIPMEMBASE) 215 #define CHIPMEMMAPSIZE btoc(CHIPMEMTOP-CHIPMEMBASE) /* 2mb */ 216 217 #define ISCIA(va) \ 218 ((char *)(va) >= ciabase && (char *)(va) < cialimit) 219 #define CIAV(pa) ((int)(pa)-CIABASE+(int)ciabase) 220 #define CIAP(va) ((int)(va)-(int)ciabase+CIABASE) 221 #define CIAPOFF(pa) ((int)(pa)-CIABASE) 222 #define CIAMAPSIZE btoc(CIATOP-CIABASE) /* 8k */ 223 224 #define ISCUSTOMCHIP(va) \ 225 ((char *)(va) >= customchipbase && (char *)(va) < customchiplimit) 226 #define CUSTOMCHIPV(pa) ((int)(pa)-CUSTOMCHIPBASE+(int)customchipbase) 227 #define CUSTOMCHIPP(va) ((int)(va)-(int)customchipbase+CUSTOMCHIPBASE) 228 #define CUSTOMCHIPPOFF(pa) ((int)(pa)-CUSTOMCHIPBASE) 229 #define CUSTOMCHIPMAPSIZE btoc(CUSTOMCHIPTOP-CUSTOMCHIPBASE) /* 1.5mb */ 230 #endif 231 232 233 /* 234 * 68851 and 68030 MMU 235 */ 236 #define PMMU_LVLMASK 0x0007 237 #define PMMU_INV 0x0400 238 #define PMMU_WP 0x0800 239 #define PMMU_ALV 0x1000 240 #define PMMU_SO 0x2000 241 #define PMMU_LV 0x4000 242 #define PMMU_BE 0x8000 243 #define PMMU_FAULT (PMMU_WP|PMMU_INV) 244 245 /* 680X0 function codes */ 246 #define FC_USERD 1 /* user data space */ 247 #define FC_USERP 2 /* user program space */ 248 #define FC_SUPERD 5 /* supervisor data space */ 249 #define FC_SUPERP 6 /* supervisor program space */ 250 #define FC_CPU 7 /* CPU space */ 251 252 /* fields in the 68020 cache control register */ 253 #define IC_ENABLE 0x0001 /* enable instruction cache */ 254 #define IC_FREEZE 0x0002 /* freeze instruction cache */ 255 #define IC_CE 0x0004 /* clear instruction cache entry */ 256 #define IC_CLR 0x0008 /* clear entire instruction cache */ 257 258 /* additional fields in the 68030 cache control register */ 259 #define IC_BE 0x0010 /* instruction burst enable */ 260 #define DC_ENABLE 0x0100 /* data cache enable */ 261 #define DC_FREEZE 0x0200 /* data cache freeze */ 262 #define DC_CE 0x0400 /* clear data cache entry */ 263 #define DC_CLR 0x0800 /* clear entire data cache */ 264 #define DC_BE 0x1000 /* data burst enable */ 265 #define DC_WA 0x2000 /* write allocate */ 266 267 /* fields in the 68040 cache control register */ 268 #define IC40_ENABLE 0x00008000 /* enable instruction cache */ 269 #define DC40_ENABLE 0x80000000 /* enable data cache */ 270 271 #define CACHE_ON (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE) 272 #define CACHE_OFF (DC_CLR|IC_CLR) 273 #define CACHE_CLR (CACHE_ON) 274 #define IC_CLEAR (DC_WA|DC_BE|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE) 275 #define DC_CLEAR (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_ENABLE) 276 277 /* 68040 cache control */ 278 #define CACHE40_ON (IC40_ENABLE|DC40_ENABLE) 279 #define CACHE40_OFF 0x00000000 280 281 /* 282 * CTL_MACHDEP definitions. 283 */ 284 #define CPU_CONSDEV 1 /* dev_t: console terminal device */ 285 #define CPU_MAXID 2 /* number of valid machdep ids */ 286 287 #define CTL_MACHDEP_NAMES { \ 288 { 0, 0 }, \ 289 { "console_device", CTLTYPE_STRUCT }, \ 290 } 291 292 #endif /* !_MACHINE_CPU_H_ */ 293