1 /* $NetBSD: ibm4xx_machdep.c,v 1.16 2011/06/18 06:41:41 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 1.16 2011/06/18 06:41:41 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 #include <sys/cpu.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/pcb.h> 100 #include <machine/trap.h> 101 102 #include <powerpc/spr.h> 103 #include <powerpc/ibm4xx/spr.h> 104 105 #include <powerpc/ibm4xx/cpu.h> 106 107 /* 108 * Global variables used here and there 109 */ 110 paddr_t msgbuf_paddr; 111 vaddr_t msgbuf_vaddr; 112 char msgbuf[MSGBUFSIZE]; 113 114 /* 115 * ibm4xx_init: 116 */ 117 void 118 ibm4xx_init(void (*handler)(void)) 119 { 120 extern int defaulttrap, defaultsize; 121 extern int sctrap, scsize; 122 extern int alitrap, alisize; 123 extern int dsitrap, dsisize; 124 extern int isitrap, isisize; 125 extern int mchktrap, mchksize; 126 extern int tlbimiss4xx, tlbim4size; 127 extern int tlbdmiss4xx, tlbdm4size; 128 extern int pitfitwdog, pitfitwdogsize; 129 extern int debugtrap, debugsize; 130 extern int errata51handler, errata51size; 131 #ifdef DDB 132 extern int ddblow, ddbsize; 133 #endif 134 #ifdef IPKDB 135 extern int ipkdblow, ipkdbsize; 136 #endif 137 uintptr_t exc; 138 struct cpu_info * const ci = curcpu(); 139 140 /* Initialize cache info for memcpy, etc. */ 141 cpu_probe_cache(); 142 143 /* 144 * Initialize lwp0 and current pcb and pmap pointers. 145 */ 146 KASSERT(ci != NULL); 147 KASSERT(curcpu() == ci); 148 lwp0.l_cpu = ci; 149 150 curpcb = lwp_getpcb(&lwp0); 151 memset(curpcb, 0, sizeof(struct pcb)); 152 153 curpcb->pcb_pm = pmap_kernel(); 154 155 /* 156 * Set up trap vectors 157 */ 158 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 159 switch (exc) { 160 default: 161 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 162 break; 163 case EXC_EXI: 164 /* 165 * This one is (potentially) installed during autoconf 166 */ 167 break; 168 case EXC_SC: 169 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 170 break; 171 case EXC_ALI: 172 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 173 break; 174 case EXC_DSI: 175 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 176 break; 177 case EXC_ISI: 178 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 179 break; 180 case EXC_MCHK: 181 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 182 break; 183 case EXC_ITMISS: 184 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 185 (size_t)&tlbim4size); 186 break; 187 case EXC_DTMISS: 188 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 189 (size_t)&tlbdm4size); 190 break; 191 /* 192 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 193 * are spaced by 0x10 bytes only.. 194 */ 195 case EXC_PIT: 196 memcpy((void *)EXC_PIT, &pitfitwdog, 197 (size_t)&pitfitwdogsize); 198 break; 199 case EXC_DEBUG: 200 memcpy((void *)EXC_DEBUG, &debugtrap, 201 (size_t)&debugsize); 202 break; 203 case EXC_DTMISS|EXC_ALI: 204 /* PPC405GP Rev D errata item 51 */ 205 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 206 (size_t)&errata51size); 207 break; 208 #if defined(DDB) || defined(IPKDB) 209 case EXC_PGM: 210 #if defined(DDB) 211 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 212 #elif defined(IPKDB) 213 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 214 #endif 215 #endif /* DDB | IPKDB */ 216 break; 217 } 218 219 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 220 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 221 222 consinit(); 223 224 /* Handle trap instruction as PGM exception */ 225 { 226 int dbcr0; 227 __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 228 __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 229 } 230 231 /* 232 * external interrupt handler install 233 */ 234 if (handler) 235 ibm4xx_install_extint(handler); 236 237 /* 238 * Now enable translation (and machine checks/recoverable interrupts). 239 */ 240 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 241 : : "r"(0), "K"(PSL_IR|PSL_DR)); 242 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 243 244 KASSERT(curcpu() == ci); 245 } 246 247 void 248 ibm4xx_install_extint(void (*handler)(void)) 249 { 250 extern int extint, extsize; 251 extern u_long extint_call; 252 u_long offset = (u_long)handler - (u_long)&extint_call; 253 int msr; 254 255 #ifdef DIAGNOSTIC 256 if (offset > 0x1ffffff) 257 panic("install_extint: too far away"); 258 #endif 259 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 260 extint_call = (extint_call & 0xfc000003) | offset; 261 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 262 __syncicache((void *)&extint_call, sizeof extint_call); 263 __syncicache((void *)EXC_EXI, (int)&extsize); 264 __asm volatile ("mtmsr %0" :: "r"(msr)); 265 } 266 267 /* 268 * ibm4xx_cpu_startup: 269 * Machine dependent startup code. 270 */ 271 void 272 ibm4xx_cpu_startup(const char *model) 273 { 274 vaddr_t minaddr, maxaddr; 275 char pbuf[9]; 276 277 KASSERT(curcpu() != NULL); 278 KASSERT(lwp0.l_cpu != NULL); 279 KASSERT(curcpu()->ci_intstk != 0); 280 KASSERT(curcpu()->ci_idepth == -1); 281 282 /* 283 * Initialize error message buffer (at end of core). 284 */ 285 #if 0 /* For some reason this fails... --Artem 286 * Besides, do we really have to put it at the end of core? 287 * Let's use static buffer for now 288 */ 289 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 290 0, UVM_KMF_VAONLY))) 291 panic("startup: no room for message buffer"); 292 for (i = 0; i < btoc(MSGBUFSIZE); i++) 293 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 294 msgbuf_paddr + i * PAGE_SIZE, 295 VM_PROT_READ|VM_PROT_WRITE, 0); 296 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 297 #else 298 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 299 #endif 300 301 printf("%s%s", copyright, version); 302 if (model != NULL) 303 printf("Model: %s\n", model); 304 305 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 306 printf("total memory = %s\n", pbuf); 307 308 minaddr = 0; 309 /* 310 * Allocate a submap for physio 311 */ 312 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 313 VM_PHYS_SIZE, 0, false, NULL); 314 315 /* 316 * No need to allocate an mbuf cluster submap. Mbuf clusters 317 * are allocated via the pool allocator, and we use direct-mapped 318 * pool pages. 319 */ 320 321 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 322 printf("avail memory = %s\n", pbuf); 323 } 324 325 /* 326 * ibm4xx_dumpsys: 327 * Crash dump handling. 328 */ 329 void 330 ibm4xx_dumpsys(void) 331 { 332 333 printf("dumpsys: TBD\n"); 334 } 335