1 /* $NetBSD: ibm4xx_machdep.c,v 1.12 2009/11/27 03:23:12 rmind 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 1.12 2009/11/27 03:23:12 rmind 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/spr.h> 99 #include <machine/trap.h> 100 101 /* 102 * Global variables used here and there 103 */ 104 paddr_t msgbuf_paddr; 105 vaddr_t msgbuf_vaddr; 106 char msgbuf[MSGBUFSIZE]; 107 108 /* 109 * ibm4xx_init: 110 */ 111 void 112 ibm4xx_init(void (*handler)(void)) 113 { 114 extern int defaulttrap, defaultsize; 115 extern int sctrap, scsize; 116 extern int alitrap, alisize; 117 extern int dsitrap, dsisize; 118 extern int isitrap, isisize; 119 extern int mchktrap, mchksize; 120 extern int tlbimiss4xx, tlbim4size; 121 extern int tlbdmiss4xx, tlbdm4size; 122 extern int pitfitwdog, pitfitwdogsize; 123 extern int debugtrap, debugsize; 124 extern int errata51handler, errata51size; 125 #ifdef DDB 126 extern int ddblow, ddbsize; 127 #endif 128 #ifdef IPKDB 129 extern int ipkdblow, ipkdbsize; 130 #endif 131 uintptr_t exc; 132 struct cpu_info * const ci = curcpu(); 133 134 /* Initialize cache info for memcpy, etc. */ 135 cpu_probe_cache(); 136 137 /* 138 * Initialize lwp0 and current pcb and pmap pointers. 139 */ 140 KASSERT(ci != NULL); 141 KASSERT(curcpu() == ci); 142 lwp0.l_cpu = ci; 143 144 curpcb = lwp_getpcb(&lwp0); 145 memset(curpcb, 0, sizeof(struct pcb)); 146 147 curpcb->pcb_pm = pmap_kernel(); 148 149 /* 150 * Set up trap vectors 151 */ 152 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 153 switch (exc) { 154 default: 155 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 156 break; 157 case EXC_EXI: 158 /* 159 * This one is (potentially) installed during autoconf 160 */ 161 break; 162 case EXC_SC: 163 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 164 break; 165 case EXC_ALI: 166 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 167 break; 168 case EXC_DSI: 169 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 170 break; 171 case EXC_ISI: 172 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 173 break; 174 case EXC_MCHK: 175 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 176 break; 177 case EXC_ITMISS: 178 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 179 (size_t)&tlbim4size); 180 break; 181 case EXC_DTMISS: 182 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 183 (size_t)&tlbdm4size); 184 break; 185 /* 186 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 187 * are spaced by 0x10 bytes only.. 188 */ 189 case EXC_PIT: 190 memcpy((void *)EXC_PIT, &pitfitwdog, 191 (size_t)&pitfitwdogsize); 192 break; 193 case EXC_DEBUG: 194 memcpy((void *)EXC_DEBUG, &debugtrap, 195 (size_t)&debugsize); 196 break; 197 case EXC_DTMISS|EXC_ALI: 198 /* PPC405GP Rev D errata item 51 */ 199 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 200 (size_t)&errata51size); 201 break; 202 #if defined(DDB) || defined(IPKDB) 203 case EXC_PGM: 204 #if defined(DDB) 205 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 206 #elif defined(IPKDB) 207 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 208 #endif 209 #endif /* DDB | IPKDB */ 210 break; 211 } 212 213 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 214 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 215 216 consinit(); 217 218 /* Handle trap instruction as PGM exception */ 219 { 220 int dbcr0; 221 __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 222 __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 223 } 224 225 /* 226 * external interrupt handler install 227 */ 228 if (handler) 229 ibm4xx_install_extint(handler); 230 231 /* 232 * Now enable translation (and machine checks/recoverable interrupts). 233 */ 234 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 235 : : "r"(0), "K"(PSL_IR|PSL_DR)); 236 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 237 238 KASSERT(curcpu() == ci); 239 } 240 241 void 242 ibm4xx_install_extint(void (*handler)(void)) 243 { 244 extern int extint, extsize; 245 extern u_long extint_call; 246 u_long offset = (u_long)handler - (u_long)&extint_call; 247 int msr; 248 249 #ifdef DIAGNOSTIC 250 if (offset > 0x1ffffff) 251 panic("install_extint: too far away"); 252 #endif 253 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 254 extint_call = (extint_call & 0xfc000003) | offset; 255 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 256 __syncicache((void *)&extint_call, sizeof extint_call); 257 __syncicache((void *)EXC_EXI, (int)&extsize); 258 __asm volatile ("mtmsr %0" :: "r"(msr)); 259 } 260 261 /* 262 * ibm4xx_cpu_startup: 263 * Machine dependent startup code. 264 */ 265 void 266 ibm4xx_cpu_startup(const char *model) 267 { 268 vaddr_t minaddr, maxaddr; 269 char pbuf[9]; 270 271 KASSERT(curcpu() != NULL); 272 KASSERT(lwp0.l_cpu != NULL); 273 KASSERT(curcpu()->ci_intstk != 0); 274 KASSERT(curcpu()->ci_intrdepth == -1); 275 276 /* 277 * Initialize error message buffer (at end of core). 278 */ 279 #if 0 /* For some reason this fails... --Artem 280 * Besides, do we really have to put it at the end of core? 281 * Let's use static buffer for now 282 */ 283 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 284 0, UVM_KMF_VAONLY))) 285 panic("startup: no room for message buffer"); 286 for (i = 0; i < btoc(MSGBUFSIZE); i++) 287 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 288 msgbuf_paddr + i * PAGE_SIZE, 289 VM_PROT_READ|VM_PROT_WRITE, 0); 290 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 291 #else 292 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 293 #endif 294 295 printf("%s%s", copyright, version); 296 if (model != NULL) 297 printf("Model: %s\n", model); 298 299 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 300 printf("total memory = %s\n", pbuf); 301 302 minaddr = 0; 303 /* 304 * Allocate a submap for physio 305 */ 306 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 307 VM_PHYS_SIZE, 0, false, NULL); 308 309 /* 310 * No need to allocate an mbuf cluster submap. Mbuf clusters 311 * are allocated via the pool allocator, and we use direct-mapped 312 * pool pages. 313 */ 314 315 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 316 printf("avail memory = %s\n", pbuf); 317 } 318 319 /* 320 * ibm4xx_dumpsys: 321 * Crash dump handling. 322 */ 323 void 324 ibm4xx_dumpsys(void) 325 { 326 327 printf("dumpsys: TBD\n"); 328 } 329