1 /* $NetBSD: ibm4xx_machdep.c,v 1.5 2005/12/24 22:45:36 perry 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 1.5 2005/12/24 22:45:36 perry 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 #include <sys/user.h> 82 83 #include <uvm/uvm_extern.h> 84 85 #if defined(DDB) 86 #include <machine/db_machdep.h> 87 #include <ddb/db_extern.h> 88 #endif 89 90 #if defined(KGDB) 91 #include <sys/kgdb.h> 92 #endif 93 94 #if defined(IPKDB) 95 #include <ipkdb/ipkdb.h> 96 #endif 97 98 #include <machine/powerpc.h> 99 #include <powerpc/spr.h> 100 #include <machine/trap.h> 101 102 /* 103 * Global variables used here and there 104 */ 105 extern struct user *proc0paddr; 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 lwp0.l_addr = proc0paddr; 146 memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr); 147 KASSERT(lwp0.l_cpu != NULL); 148 149 curpcb = &proc0paddr->u_pcb; 150 memset(curpcb, 0, sizeof(*curpcb)); 151 curpcb->pcb_pm = pmap_kernel(); 152 153 /* 154 * Set up trap vectors 155 */ 156 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 157 switch (exc) { 158 default: 159 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 160 break; 161 case EXC_EXI: 162 /* 163 * This one is (potentially) installed during autoconf 164 */ 165 break; 166 case EXC_SC: 167 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 168 break; 169 case EXC_ALI: 170 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 171 break; 172 case EXC_DSI: 173 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 174 break; 175 case EXC_ISI: 176 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 177 break; 178 case EXC_MCHK: 179 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 180 break; 181 case EXC_ITMISS: 182 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 183 (size_t)&tlbim4size); 184 break; 185 case EXC_DTMISS: 186 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 187 (size_t)&tlbdm4size); 188 break; 189 /* 190 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 191 * are spaced by 0x10 bytes only.. 192 */ 193 case EXC_PIT: 194 memcpy((void *)EXC_PIT, &pitfitwdog, 195 (size_t)&pitfitwdogsize); 196 break; 197 case EXC_DEBUG: 198 memcpy((void *)EXC_DEBUG, &debugtrap, 199 (size_t)&debugsize); 200 break; 201 case EXC_DTMISS|EXC_ALI: 202 /* PPC405GP Rev D errata item 51 */ 203 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 204 (size_t)&errata51size); 205 break; 206 #if defined(DDB) || defined(IPKDB) 207 case EXC_PGM: 208 #if defined(DDB) 209 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 210 #elif defined(IPKDB) 211 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 212 #endif 213 #endif /* DDB | IPKDB */ 214 break; 215 } 216 217 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 218 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 219 220 consinit(); 221 222 /* Handle trap instruction as PGM exception */ 223 { 224 int dbcr0; 225 __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 226 __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 227 } 228 229 /* 230 * external interrupt handler install 231 */ 232 if (handler) 233 ibm4xx_install_extint(handler); 234 235 /* 236 * Now enable translation (and machine checks/recoverable interrupts). 237 */ 238 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 239 : : "r"(0), "K"(PSL_IR|PSL_DR)); 240 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 241 242 KASSERT(curcpu() == ci); 243 } 244 245 void 246 ibm4xx_install_extint(void (*handler)(void)) 247 { 248 extern int extint, extsize; 249 extern u_long extint_call; 250 u_long offset = (u_long)handler - (u_long)&extint_call; 251 int msr; 252 253 #ifdef DIAGNOSTIC 254 if (offset > 0x1ffffff) 255 panic("install_extint: too far away"); 256 #endif 257 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 258 extint_call = (extint_call & 0xfc000003) | offset; 259 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 260 __syncicache((void *)&extint_call, sizeof extint_call); 261 __syncicache((void *)EXC_EXI, (int)&extsize); 262 __asm volatile ("mtmsr %0" :: "r"(msr)); 263 } 264 265 /* 266 * ibm4xx_cpu_startup: 267 * Machine dependent startup code. 268 */ 269 void 270 ibm4xx_cpu_startup(const char *model) 271 { 272 vaddr_t minaddr, maxaddr; 273 char pbuf[9]; 274 275 KASSERT(curcpu() != NULL); 276 KASSERT(lwp0.l_cpu != NULL); 277 KASSERT(curcpu()->ci_intstk != 0); 278 KASSERT(curcpu()->ci_intrdepth == -1); 279 280 /* 281 * Initialize error message buffer (at end of core). 282 */ 283 #if 0 /* For some reason this fails... --Artem 284 * Besides, do we really have to put it at the end of core? 285 * Let's use static buffer for now 286 */ 287 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 288 0, UVM_KMF_VAONLY))) 289 panic("startup: no room for message buffer"); 290 for (i = 0; i < btoc(MSGBUFSIZE); i++) 291 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 292 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 293 initmsgbuf((caddr_t)msgbuf_vaddr, round_page(MSGBUFSIZE)); 294 #else 295 initmsgbuf((caddr_t)msgbuf, round_page(MSGBUFSIZE)); 296 #endif 297 298 printf("%s%s", copyright, version); 299 if (model != NULL) 300 printf("Model: %s\n", model); 301 302 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 303 printf("total memory = %s\n", pbuf); 304 305 minaddr = 0; 306 /* 307 * Allocate a submap for exec arguments. This map effectively 308 * limits the number of processes exec'ing at any time. 309 */ 310 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 311 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 312 313 /* 314 * Allocate a submap for physio 315 */ 316 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 317 VM_PHYS_SIZE, 0, FALSE, NULL); 318 319 /* 320 * No need to allocate an mbuf cluster submap. Mbuf clusters 321 * are allocated via the pool allocator, and we use direct-mapped 322 * pool pages. 323 */ 324 325 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 326 printf("avail memory = %s\n", pbuf); 327 } 328 329 /* 330 * ibm4xx_dumpsys: 331 * Crash dump handling. 332 */ 333 void 334 ibm4xx_dumpsys(void) 335 { 336 337 printf("dumpsys: TBD\n"); 338 } 339