1 /* $NetBSD: ibm4xx_machdep.c,v 1.15 2011/01/18 01:02:54 matt Exp $ */ 2 /* Original: ibm40x_machdep.c,v 1.3 2005/01/17 17:19:36 shige Exp $ */ 3 4 /* 5 * Copyright 2001, 2002 Wasabi Systems, Inc. 6 * All rights reserved. 7 * 8 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc. 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 for the NetBSD Project by 21 * Wasabi Systems, Inc. 22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 23 * or promote products derived from this software without specific prior 24 * written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 41 * Copyright (C) 1995, 1996 TooLs GmbH. 42 * All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by TooLs GmbH. 55 * 4. The name of TooLs GmbH may not be used to endorse or promote products 56 * derived from this software without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 61 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 62 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 63 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 64 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 65 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 66 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 67 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 68 */ 69 70 #include <sys/cdefs.h> 71 __KERNEL_RCSID(0, "$NetBSD: ibm4xx_machdep.c,v 1.15 2011/01/18 01:02:54 matt Exp $"); 72 73 #include "opt_compat_netbsd.h" 74 #include "opt_ddb.h" 75 #include "opt_kgdb.h" 76 #include "opt_ipkdb.h" 77 78 #include <sys/param.h> 79 #include <sys/msgbuf.h> 80 #include <sys/proc.h> 81 82 #include <uvm/uvm_extern.h> 83 84 #if defined(DDB) 85 #include <machine/db_machdep.h> 86 #include <ddb/db_extern.h> 87 #endif 88 89 #if defined(KGDB) 90 #include <sys/kgdb.h> 91 #endif 92 93 #if defined(IPKDB) 94 #include <ipkdb/ipkdb.h> 95 #endif 96 97 #include <machine/powerpc.h> 98 #include <powerpc/pcb.h> 99 #include <powerpc/spr.h> 100 #include <powerpc/ibm4xx/spr.h> 101 #include <machine/trap.h> 102 103 /* 104 * Global variables used here and there 105 */ 106 paddr_t msgbuf_paddr; 107 vaddr_t msgbuf_vaddr; 108 char msgbuf[MSGBUFSIZE]; 109 110 /* 111 * ibm4xx_init: 112 */ 113 void 114 ibm4xx_init(void (*handler)(void)) 115 { 116 extern int defaulttrap, defaultsize; 117 extern int sctrap, scsize; 118 extern int alitrap, alisize; 119 extern int dsitrap, dsisize; 120 extern int isitrap, isisize; 121 extern int mchktrap, mchksize; 122 extern int tlbimiss4xx, tlbim4size; 123 extern int tlbdmiss4xx, tlbdm4size; 124 extern int pitfitwdog, pitfitwdogsize; 125 extern int debugtrap, debugsize; 126 extern int errata51handler, errata51size; 127 #ifdef DDB 128 extern int ddblow, ddbsize; 129 #endif 130 #ifdef IPKDB 131 extern int ipkdblow, ipkdbsize; 132 #endif 133 uintptr_t exc; 134 struct cpu_info * const ci = curcpu(); 135 136 /* Initialize cache info for memcpy, etc. */ 137 cpu_probe_cache(); 138 139 /* 140 * Initialize lwp0 and current pcb and pmap pointers. 141 */ 142 KASSERT(ci != NULL); 143 KASSERT(curcpu() == ci); 144 lwp0.l_cpu = ci; 145 146 curpcb = lwp_getpcb(&lwp0); 147 memset(curpcb, 0, sizeof(struct pcb)); 148 149 curpcb->pcb_pm = pmap_kernel(); 150 151 /* 152 * Set up trap vectors 153 */ 154 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 155 switch (exc) { 156 default: 157 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 158 break; 159 case EXC_EXI: 160 /* 161 * This one is (potentially) installed during autoconf 162 */ 163 break; 164 case EXC_SC: 165 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 166 break; 167 case EXC_ALI: 168 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 169 break; 170 case EXC_DSI: 171 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 172 break; 173 case EXC_ISI: 174 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 175 break; 176 case EXC_MCHK: 177 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 178 break; 179 case EXC_ITMISS: 180 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 181 (size_t)&tlbim4size); 182 break; 183 case EXC_DTMISS: 184 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 185 (size_t)&tlbdm4size); 186 break; 187 /* 188 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 189 * are spaced by 0x10 bytes only.. 190 */ 191 case EXC_PIT: 192 memcpy((void *)EXC_PIT, &pitfitwdog, 193 (size_t)&pitfitwdogsize); 194 break; 195 case EXC_DEBUG: 196 memcpy((void *)EXC_DEBUG, &debugtrap, 197 (size_t)&debugsize); 198 break; 199 case EXC_DTMISS|EXC_ALI: 200 /* PPC405GP Rev D errata item 51 */ 201 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 202 (size_t)&errata51size); 203 break; 204 #if defined(DDB) || defined(IPKDB) 205 case EXC_PGM: 206 #if defined(DDB) 207 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 208 #elif defined(IPKDB) 209 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 210 #endif 211 #endif /* DDB | IPKDB */ 212 break; 213 } 214 215 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 216 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 217 218 consinit(); 219 220 /* Handle trap instruction as PGM exception */ 221 { 222 int dbcr0; 223 __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 224 __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 225 } 226 227 /* 228 * external interrupt handler install 229 */ 230 if (handler) 231 ibm4xx_install_extint(handler); 232 233 /* 234 * Now enable translation (and machine checks/recoverable interrupts). 235 */ 236 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 237 : : "r"(0), "K"(PSL_IR|PSL_DR)); 238 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 239 240 KASSERT(curcpu() == ci); 241 } 242 243 void 244 ibm4xx_install_extint(void (*handler)(void)) 245 { 246 extern int extint, extsize; 247 extern u_long extint_call; 248 u_long offset = (u_long)handler - (u_long)&extint_call; 249 int msr; 250 251 #ifdef DIAGNOSTIC 252 if (offset > 0x1ffffff) 253 panic("install_extint: too far away"); 254 #endif 255 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 256 extint_call = (extint_call & 0xfc000003) | offset; 257 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 258 __syncicache((void *)&extint_call, sizeof extint_call); 259 __syncicache((void *)EXC_EXI, (int)&extsize); 260 __asm volatile ("mtmsr %0" :: "r"(msr)); 261 } 262 263 /* 264 * ibm4xx_cpu_startup: 265 * Machine dependent startup code. 266 */ 267 void 268 ibm4xx_cpu_startup(const char *model) 269 { 270 vaddr_t minaddr, maxaddr; 271 char pbuf[9]; 272 273 KASSERT(curcpu() != NULL); 274 KASSERT(lwp0.l_cpu != NULL); 275 KASSERT(curcpu()->ci_intstk != 0); 276 KASSERT(curcpu()->ci_idepth == -1); 277 278 /* 279 * Initialize error message buffer (at end of core). 280 */ 281 #if 0 /* For some reason this fails... --Artem 282 * Besides, do we really have to put it at the end of core? 283 * Let's use static buffer for now 284 */ 285 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 286 0, UVM_KMF_VAONLY))) 287 panic("startup: no room for message buffer"); 288 for (i = 0; i < btoc(MSGBUFSIZE); i++) 289 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 290 msgbuf_paddr + i * PAGE_SIZE, 291 VM_PROT_READ|VM_PROT_WRITE, 0); 292 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 293 #else 294 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 295 #endif 296 297 printf("%s%s", copyright, version); 298 if (model != NULL) 299 printf("Model: %s\n", model); 300 301 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 302 printf("total memory = %s\n", pbuf); 303 304 minaddr = 0; 305 /* 306 * Allocate a submap for physio 307 */ 308 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 309 VM_PHYS_SIZE, 0, false, NULL); 310 311 /* 312 * No need to allocate an mbuf cluster submap. Mbuf clusters 313 * are allocated via the pool allocator, and we use direct-mapped 314 * pool pages. 315 */ 316 317 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 318 printf("avail memory = %s\n", pbuf); 319 } 320 321 /* 322 * ibm4xx_dumpsys: 323 * Crash dump handling. 324 */ 325 void 326 ibm4xx_dumpsys(void) 327 { 328 329 printf("dumpsys: TBD\n"); 330 } 331