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 * from: @(#)cpu.h 7.7 (Berkeley) 6/27/91 41 * $Id: cpu.h,v 1.2 1993/05/22 07:58:17 cgd Exp $ 42 */ 43 44 /* 45 * Exported definitions unique to hp300/68k cpu support. 46 */ 47 48 /* 49 * definitions of cpu-dependent requirements 50 * referenced in generic code 51 */ 52 #define COPY_SIGCODE /* copy sigcode above user stack in exec */ 53 54 /* 55 * function vs. inline configuration; 56 * these are defined to get generic functions 57 * rather than inline or machine-dependent implementations 58 */ 59 #define NEED_MINMAX /* need {,i,l,ul}{min,max} functions */ 60 #undef NEED_FFS /* don't need ffs function */ 61 #undef NEED_BCMP /* don't need bcmp function */ 62 #undef NEED_STRLEN /* don't need strlen function */ 63 64 #define cpu_exec(p) /* nothing */ 65 #define cpu_wait(p) /* nothing */ 66 67 /* 68 * Arguments to hardclock, softclock and gatherstats 69 * encapsulate the previous machine state in an opaque 70 * clockframe; for hp300, use just what the hardware 71 * leaves on the stack. 72 */ 73 typedef struct intrframe { 74 int pc; 75 int ps; 76 } clockframe; 77 78 #define CLKF_USERMODE(framep) (((framep)->ps & PSL_S) == 0) 79 #define CLKF_BASEPRI(framep) (((framep)->ps & PSL_IPL7) == 0) 80 #define CLKF_PC(framep) ((framep)->pc) 81 82 83 /* 84 * Preempt the current process if in interrupt from user mode, 85 * or after the current trap/syscall if in system mode. 86 */ 87 #define need_resched() { want_resched++; aston(); } 88 89 /* 90 * Give a profiling tick to the current process from the softclock 91 * interrupt. On hp300, request an ast to send us through trap(), 92 * marking the proc as needing a profiling tick. 93 */ 94 #define profile_tick(p, framep) { (p)->p_flag |= SOWEUPC; aston(); } 95 96 /* 97 * Notify the current process (p) that it has a signal pending, 98 * process as soon as possible. 99 */ 100 #define signotify(p) aston() 101 102 #define aston() (astpending++) 103 104 int astpending; /* need to trap before returning to user mode */ 105 int want_resched; /* resched() was called */ 106 107 108 /* 109 * simulated software interrupt register 110 */ 111 extern unsigned char ssir; 112 113 #define SIR_NET 0x1 114 #define SIR_CLOCK 0x2 115 116 #define siroff(x) ssir &= ~(x) 117 #define setsoftnet() ssir |= SIR_NET 118 #define setsoftclock() ssir |= SIR_CLOCK 119 120 121 122 /* 123 * The rest of this should probably be moved to ../hp300/hp300cpu.h, 124 * although some of it could probably be put into generic 68k headers. 125 */ 126 127 /* values for machineid */ 128 #define HP_320 0 /* 16Mhz 68020+HP MMU+16K external cache */ 129 #define HP_330 1 /* 16Mhz 68020+68851 MMU */ 130 #define HP_350 2 /* 25Mhz 68020+HP MMU+32K external cache */ 131 #define HP_360 3 /* 25Mhz 68030 */ 132 #define HP_370 4 /* 33Mhz 68030+64K external cache */ 133 #define HP_340 5 /* 16Mhz 68030 */ 134 #define HP_375 6 /* 50Mhz 68030+32K external cache */ 135 136 /* values for mmutype (assigned for quick testing) */ 137 #define MMU_68030 -1 /* 68030 on-chip subset of 68851 */ 138 #define MMU_HP 0 /* HP proprietary */ 139 #define MMU_68851 1 /* Motorola 68851 */ 140 141 /* values for ectype */ 142 #define EC_PHYS -1 /* external physical address cache */ 143 #define EC_NONE 0 /* no external cache */ 144 #define EC_VIRT 1 /* external virtual address cache */ 145 146 /* values for cpuspeed (not really related to clock speed due to caches) */ 147 #define MHZ_8 1 148 #define MHZ_16 2 149 #define MHZ_25 3 150 #define MHZ_33 4 151 #define MHZ_50 6 152 153 #ifdef KERNEL 154 extern int machineid, mmutype, ectype; 155 extern char *intiobase, *intiolimit; 156 157 /* what is this supposed to do? i.e. how is it different than startrtclock? */ 158 #define enablertclock() 159 160 #endif 161 162 /* physical memory sections */ 163 #define ROMBASE (0x00000000) 164 #define INTIOBASE (0x00400000) 165 #define INTIOTOP (0x00600000) 166 #define EXTIOBASE (0x00600000) 167 #define EXTIOTOP (0x20000000) 168 #define MAXADDR (0xFFFFF000) 169 170 /* 171 * Internal IO space: 172 * 173 * Ranges from 0x400000 to 0x600000 (IIOMAPSIZE). 174 * 175 * Internal IO space is mapped in the kernel from ``intiobase'' to 176 * ``intiolimit'' (defined in locore.s). Since it is always mapped, 177 * conversion between physical and kernel virtual addresses is easy. 178 */ 179 #define ISIIOVA(va) \ 180 ((char *)(va) >= intiobase && (char *)(va) < intiolimit) 181 #define IIOV(pa) ((int)(pa)-INTIOBASE+(int)intiobase) 182 #define IIOP(va) ((int)(va)-(int)intiobase+INTIOBASE) 183 #define IIOPOFF(pa) ((int)(pa)-INTIOBASE) 184 #define IIOMAPSIZE btoc(INTIOTOP-INTIOBASE) /* 2mb */ 185 186 /* 187 * External IO space: 188 * 189 * DIO ranges from select codes 0-63 at physical addresses given by: 190 * 0x600000 + (sc - 32) * 0x10000 191 * DIO cards are addressed in the range 0-31 [0x600000-0x800000) for 192 * their control space and the remaining areas, [0x200000-0x400000) and 193 * [0x800000-0x1000000), are for additional space required by a card; 194 * e.g. a display framebuffer. 195 * 196 * DIO-II ranges from select codes 132-255 at physical addresses given by: 197 * 0x1000000 + (sc - 132) * 0x400000 198 * The address range of DIO-II space is thus [0x1000000-0x20000000). 199 * 200 * DIO/DIO-II space is too large to map in its entirety, instead devices 201 * are mapped into kernel virtual address space allocated from a range 202 * of EIOMAPSIZE pages (vmparam.h) starting at ``extiobase''. 203 */ 204 #define DIOBASE (0x600000) 205 #define DIOTOP (0x1000000) 206 #define DIOCSIZE (0x10000) 207 #define DIOIIBASE (0x01000000) 208 #define DIOIITOP (0x20000000) 209 #define DIOIICSIZE (0x00400000) 210 211 /* 212 * HP MMU 213 */ 214 #define MMUBASE IIOPOFF(0x5F4000) 215 #define MMUSSTP 0x0 216 #define MMUUSTP 0x4 217 #define MMUTBINVAL 0x8 218 #define MMUSTAT 0xC 219 #define MMUCMD MMUSTAT 220 221 #define MMU_UMEN 0x0001 /* enable user mapping */ 222 #define MMU_SMEN 0x0002 /* enable supervisor mapping */ 223 #define MMU_CEN 0x0004 /* enable data cache */ 224 #define MMU_BERR 0x0008 /* bus error */ 225 #define MMU_IEN 0x0020 /* enable instruction cache */ 226 #define MMU_FPE 0x0040 /* enable 68881 FP coprocessor */ 227 #define MMU_WPF 0x2000 /* write protect fault */ 228 #define MMU_PF 0x4000 /* page fault */ 229 #define MMU_PTF 0x8000 /* page table fault */ 230 231 #define MMU_FAULT (MMU_PTF|MMU_PF|MMU_WPF|MMU_BERR) 232 #define MMU_ENAB (MMU_UMEN|MMU_SMEN|MMU_IEN|MMU_FPE) 233 234 /* 235 * 68851 and 68030 MMU 236 */ 237 #define PMMU_LVLMASK 0x0007 238 #define PMMU_INV 0x0400 239 #define PMMU_WP 0x0800 240 #define PMMU_ALV 0x1000 241 #define PMMU_SO 0x2000 242 #define PMMU_LV 0x4000 243 #define PMMU_BE 0x8000 244 #define PMMU_FAULT (PMMU_WP|PMMU_INV) 245 246 /* 680X0 function codes */ 247 #define FC_USERD 1 /* user data space */ 248 #define FC_USERP 2 /* user program space */ 249 #define FC_PURGE 3 /* HPMMU: clear TLB entries */ 250 #define FC_SUPERD 5 /* supervisor data space */ 251 #define FC_SUPERP 6 /* supervisor program space */ 252 #define FC_CPU 7 /* CPU space */ 253 254 /* fields in the 68020 cache control register */ 255 #define IC_ENABLE 0x0001 /* enable instruction cache */ 256 #define IC_FREEZE 0x0002 /* freeze instruction cache */ 257 #define IC_CE 0x0004 /* clear instruction cache entry */ 258 #define IC_CLR 0x0008 /* clear entire instruction cache */ 259 260 /* additional fields in the 68030 cache control register */ 261 #define IC_BE 0x0010 /* instruction burst enable */ 262 #define DC_ENABLE 0x0100 /* data cache enable */ 263 #define DC_FREEZE 0x0200 /* data cache freeze */ 264 #define DC_CE 0x0400 /* clear data cache entry */ 265 #define DC_CLR 0x0800 /* clear entire data cache */ 266 #define DC_BE 0x1000 /* data burst enable */ 267 #define DC_WA 0x2000 /* write allocate */ 268 269 #define CACHE_ON (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE) 270 #define CACHE_OFF (DC_CLR|IC_CLR) 271 #define CACHE_CLR (CACHE_ON) 272 #define IC_CLEAR (DC_WA|DC_BE|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE) 273 #define DC_CLEAR (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_ENABLE) 274