machdep.c revision 1.35.40.1
1 /* $NetBSD: machdep.c,v 1.35.40.1 2008/07/02 19:08:16 mjf Exp $ */ 2 3 /* 4 * Copyright 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 40 * Copyright (C) 1995, 1996 TooLs GmbH. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by TooLs GmbH. 54 * 4. The name of TooLs GmbH may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 61 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 62 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 63 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 64 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 65 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 66 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 #include <sys/cdefs.h> 70 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.35.40.1 2008/07/02 19:08:16 mjf Exp $"); 71 72 #include "opt_compat_netbsd.h" 73 #include "opt_ddb.h" 74 #include "opt_ipkdb.h" 75 76 #include <sys/param.h> 77 #include <sys/buf.h> 78 #include <sys/exec.h> 79 #include <sys/malloc.h> 80 #include <sys/mbuf.h> 81 #include <sys/mount.h> 82 #include <sys/msgbuf.h> 83 #include <sys/proc.h> 84 #include <sys/reboot.h> 85 #include <sys/syscallargs.h> 86 #include <sys/syslog.h> 87 #include <sys/systm.h> 88 #include <sys/kernel.h> 89 #include <sys/user.h> 90 #include <sys/boot_flag.h> 91 #include <sys/ksyms.h> 92 93 #include <uvm/uvm_extern.h> 94 95 #include <net/netisr.h> 96 97 #include <prop/proplib.h> 98 99 #include <machine/bus.h> 100 #include <machine/powerpc.h> 101 #include <machine/trap.h> 102 #include <machine/walnut.h> 103 104 #include <powerpc/spr.h> 105 #include <powerpc/ibm4xx/dcr405gp.h> 106 107 #include <dev/cons.h> 108 109 #include "ksyms.h" 110 111 #if defined(DDB) 112 #include <machine/db_machdep.h> 113 #include <ddb/db_extern.h> 114 #endif 115 116 117 #define TLB_PG_SIZE (16*1024*1024) 118 119 /* 120 * Global variables used here and there 121 */ 122 struct vm_map *mb_map = NULL; 123 struct vm_map *phys_map = NULL; 124 125 /* 126 * This should probably be in autoconf! XXX 127 */ 128 char cpu_model[80]; 129 char machine[] = MACHINE; /* from <machine/param.h> */ 130 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 131 132 extern struct user *proc0paddr; 133 134 char bootpath[256]; 135 paddr_t msgbuf_paddr; 136 vaddr_t msgbuf_vaddr; 137 138 #if NKSYMS || defined(DDB) || defined(LKM) 139 void *startsym, *endsym; 140 #endif 141 142 int lcsplx(int); 143 void initppc(u_int, u_int, char *, void *); 144 145 static void dumpsys(void); 146 static void install_extint(void (*)(void)); 147 148 #define MEMREGIONS 8 149 struct mem_region physmemr[MEMREGIONS]; /* Hard code memory */ 150 struct mem_region availmemr[MEMREGIONS]; /* Who's supposed to set these up? */ 151 152 struct board_cfg_data board_data; 153 154 void 155 initppc(u_int startkernel, u_int endkernel, char *args, void *info_block) 156 { 157 extern int defaulttrap, defaultsize; 158 extern int sctrap, scsize; 159 extern int alitrap, alisize; 160 extern int dsitrap, dsisize; 161 extern int isitrap, isisize; 162 extern int mchktrap, mchksize; 163 extern int tlbimiss4xx, tlbim4size; 164 extern int tlbdmiss4xx, tlbdm4size; 165 extern int pitfitwdog, pitfitwdogsize; 166 extern int debugtrap, debugsize; 167 extern int errata51handler, errata51size; 168 #ifdef DDB 169 extern int ddblow, ddbsize; 170 #endif 171 #ifdef IPKDB 172 extern int ipkdblow, ipkdbsize; 173 #endif 174 vaddr_t va; 175 int exc, dbcr0; 176 struct cpu_info * const ci = curcpu(); 177 178 /* Disable all external interrupts */ 179 mtdcr(DCR_UIC0_ER, 0); 180 181 /* Initialize cache info for memcpy, etc. */ 182 cpu_probe_cache(); 183 184 /* Save info block */ 185 memcpy(&board_data, info_block, sizeof(board_data)); 186 187 memset(physmemr, 0, sizeof physmemr); 188 memset(availmemr, 0, sizeof availmemr); 189 physmemr[0].start = 0; 190 physmemr[0].size = board_data.mem_size & ~PGOFSET; 191 /* Lower memory reserved by eval board BIOS */ 192 availmemr[0].start = startkernel; 193 availmemr[0].size = board_data.mem_size - availmemr[0].start; 194 195 /* Linear map kernel memory */ 196 for (va = 0; va < endkernel; va += TLB_PG_SIZE) 197 ppc4xx_tlb_reserve(va, va, TLB_PG_SIZE, TLB_EX); 198 199 /* Map console after physmem (see pmap_tlbmiss()) */ 200 ppc4xx_tlb_reserve(0xef000000, roundup(physmemr[0].size, TLB_PG_SIZE), 201 TLB_PG_SIZE, TLB_I | TLB_G); 202 203 /* 204 * Initialize lwp0 and current pcb and pmap pointers. 205 */ 206 lwp0.l_cpu = ci; 207 lwp0.l_addr = proc0paddr; 208 memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr); 209 210 curpcb = &proc0paddr->u_pcb; 211 curpcb->pcb_pm = pmap_kernel(); 212 213 /* 214 * Set up trap vectors 215 */ 216 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 217 switch (exc) { 218 default: 219 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 220 break; 221 case EXC_EXI: 222 /* 223 * This one is (potentially) installed during autoconf 224 */ 225 break; 226 case EXC_SC: 227 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 228 break; 229 case EXC_ALI: 230 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 231 break; 232 case EXC_DSI: 233 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 234 break; 235 case EXC_ISI: 236 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 237 break; 238 case EXC_MCHK: 239 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 240 break; 241 case EXC_ITMISS: 242 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 243 (size_t)&tlbim4size); 244 break; 245 case EXC_DTMISS: 246 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 247 (size_t)&tlbdm4size); 248 break; 249 /* 250 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 251 * are spaced by 0x10 bytes only.. 252 */ 253 case EXC_PIT: 254 memcpy((void *)EXC_PIT, &pitfitwdog, 255 (size_t)&pitfitwdogsize); 256 break; 257 case EXC_DEBUG: 258 memcpy((void *)EXC_DEBUG, &debugtrap, 259 (size_t)&debugsize); 260 break; 261 case EXC_DTMISS|EXC_ALI: 262 /* PPC405GP Rev D errata item 51 */ 263 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 264 (size_t)&errata51size); 265 break; 266 #if defined(DDB) || defined(IPKDB) 267 case EXC_PGM: 268 #if defined(DDB) 269 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 270 #elif defined(IPKDB) 271 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 272 #endif 273 #endif /* DDB | IPKDB */ 274 break; 275 } 276 277 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 278 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 279 280 consinit(); 281 282 /* Handle trap instruction as PGM exception */ 283 __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 284 __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 285 286 /* 287 * external interrupt handler install 288 */ 289 install_extint(ext_intr); 290 291 /* 292 * Now enable translation (and machine checks/recoverable interrupts). 293 */ 294 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 295 : : "r"(0), "K"(PSL_IR|PSL_DR)); 296 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 297 298 uvm_setpagesize(); 299 300 /* 301 * Initialize pmap module. 302 */ 303 pmap_bootstrap(startkernel, endkernel); 304 305 #ifdef DEBUG 306 printf("Board config data:\n"); 307 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 308 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 309 printf(" mem_size = %u\n", board_data.mem_size); 310 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 311 board_data.mac_address_local[0], board_data.mac_address_local[1], 312 board_data.mac_address_local[2], board_data.mac_address_local[3], 313 board_data.mac_address_local[4], board_data.mac_address_local[5]); 314 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 315 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 316 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 317 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 318 printf(" processor_speed = %u\n", board_data.processor_speed); 319 printf(" plb_speed = %u\n", board_data.plb_speed); 320 printf(" pci_speed = %u\n", board_data.pci_speed); 321 #endif 322 323 #if NKSYMS || defined(DDB) || defined(LKM) 324 ksyms_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 325 #endif 326 #ifdef DDB 327 if (boothowto & RB_KDB) 328 Debugger(); 329 #endif 330 #ifdef IPKDB 331 /* 332 * Now trap to IPKDB 333 */ 334 ipkdb_init(); 335 if (boothowto & RB_KDB) 336 ipkdb_connect(0); 337 #endif 338 } 339 340 static void 341 install_extint(void (*handler)(void)) 342 { 343 extern int extint, extsize; 344 extern u_long extint_call; 345 u_long offset = (u_long)handler - (u_long)&extint_call; 346 int msr; 347 348 #ifdef DIAGNOSTIC 349 if (offset > 0x1ffffff) 350 panic("install_extint: too far away"); 351 #endif 352 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 353 extint_call = (extint_call & 0xfc000003) | offset; 354 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 355 __syncicache((void *)&extint_call, sizeof extint_call); 356 __syncicache((void *)EXC_EXI, (int)&extsize); 357 __asm volatile ("mtmsr %0" :: "r"(msr)); 358 } 359 360 /* 361 * Machine dependent startup code. 362 */ 363 364 char msgbuf[MSGBUFSIZE]; 365 366 void 367 cpu_startup(void) 368 { 369 vaddr_t minaddr, maxaddr; 370 prop_number_t pn; 371 prop_data_t pd; 372 char pbuf[9]; 373 374 /* 375 * Initialize error message buffer (at end of core). 376 */ 377 #if 0 /* For some reason this fails... --Artem 378 * Besides, do we really have to put it at the end of core? 379 * Let's use static buffer for now 380 */ 381 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 0, 382 UVM_KMF_VAONLY))) 383 panic("startup: no room for message buffer"); 384 for (i = 0; i < btoc(MSGBUFSIZE); i++) 385 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 386 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 387 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 388 #else 389 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 390 #endif 391 392 printf("%s%s", copyright, version); 393 printf("Walnut PowerPC 405GP Evaluation Board\n"); 394 395 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 396 printf("total memory = %s\n", pbuf); 397 398 minaddr = 0; 399 /* 400 * Allocate a submap for physio 401 */ 402 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 403 VM_PHYS_SIZE, 0, false, NULL); 404 405 /* 406 * No need to allocate an mbuf cluster submap. Mbuf clusters 407 * are allocated via the pool allocator, and we use direct-mapped 408 * pool pages. 409 */ 410 411 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 412 printf("avail memory = %s\n", pbuf); 413 414 /* 415 * Set up the board properties dictionary. 416 */ 417 board_properties = prop_dictionary_create(); 418 KASSERT(board_properties != NULL); 419 420 pn = prop_number_create_integer(board_data.mem_size); 421 KASSERT(pn != NULL); 422 if (prop_dictionary_set(board_properties, "mem-size", pn) == false) 423 panic("setting mem-size"); 424 prop_object_release(pn); 425 426 pd = prop_data_create_data_nocopy(board_data.mac_address_local, 427 sizeof(board_data.mac_address_local)); 428 KASSERT(pd != NULL); 429 if (prop_dictionary_set(board_properties, "emac0-mac-addr", 430 pd) == false) 431 panic("setting emac0-mac-addr"); 432 prop_object_release(pd); 433 434 pd = prop_data_create_data_nocopy(board_data.mac_address_pci, 435 sizeof(board_data.mac_address_pci)); 436 KASSERT(pd != NULL); 437 if (prop_dictionary_set(board_properties, "sip0-mac-addr", 438 pd) == false) 439 panic("setting sip0-mac-addr"); 440 prop_object_release(pd); 441 442 pn = prop_number_create_integer(board_data.processor_speed); 443 KASSERT(pn != NULL); 444 if (prop_dictionary_set(board_properties, "processor-frequency", 445 pn) == false) 446 panic("setting processor-frequency"); 447 prop_object_release(pn); 448 449 /* 450 * Now that we have VM, malloc()s are OK in bus_space. 451 */ 452 bus_space_mallocok(); 453 fake_mapiodev = 0; 454 } 455 456 457 static void 458 dumpsys(void) 459 { 460 461 printf("dumpsys: TBD\n"); 462 } 463 464 /* 465 * Halt or reboot the machine after syncing/dumping according to howto. 466 */ 467 void 468 cpu_reboot(int howto, char *what) 469 { 470 static int syncing; 471 static char str[256]; 472 char *ap = str, *ap1 = ap; 473 474 boothowto = howto; 475 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 476 syncing = 1; 477 vfs_shutdown(); /* sync */ 478 resettodr(); /* set wall clock */ 479 } 480 481 splhigh(); 482 483 if (!cold && (howto & RB_DUMP)) 484 dumpsys(); 485 486 doshutdownhooks(); 487 488 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 489 /* Power off here if we know how...*/ 490 } 491 492 if (howto & RB_HALT) { 493 printf("halted\n\n"); 494 495 goto reboot; /* XXX for now... */ 496 497 #ifdef DDB 498 printf("dropping to debugger\n"); 499 while(1) 500 Debugger(); 501 #endif 502 } 503 504 printf("rebooting\n\n"); 505 if (what && *what) { 506 if (strlen(what) > sizeof str - 5) 507 printf("boot string too large, ignored\n"); 508 else { 509 strcpy(str, what); 510 ap1 = ap = str + strlen(str); 511 *ap++ = ' '; 512 } 513 } 514 *ap++ = '-'; 515 if (howto & RB_SINGLE) 516 *ap++ = 's'; 517 if (howto & RB_KDB) 518 *ap++ = 'd'; 519 *ap++ = 0; 520 if (ap[-2] == '-') 521 *ap1 = 0; 522 523 /* flush cache for msgbuf */ 524 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 525 526 reboot: 527 ppc4xx_reset(); 528 529 printf("ppc4xx_reset() failed!\n"); 530 #ifdef DDB 531 while(1) 532 Debugger(); 533 #else 534 while (1) 535 /* nothing */; 536 #endif 537 } 538 539 int 540 lcsplx(int ipl) 541 { 542 543 return spllower(ipl); /* XXX */ 544 } 545 546 void 547 mem_regions(struct mem_region **mem, struct mem_region **avail) 548 { 549 550 *mem = physmemr; 551 *avail = availmemr; 552 } 553
Indexes created Sun Oct 19 02:09:48 GMT 2025