machdep.c revision 1.42
1 /* $NetBSD: machdep.c,v 1.42 2009/11/26 00:19:17 matt 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 1.42 2009/11/26 00:19:17 matt Exp $"); 71 72 #include "opt_compat_netbsd.h" 73 #include "opt_ddb.h" 74 #include "opt_ipkdb.h" 75 #include "opt_modular.h" 76 77 #include <sys/param.h> 78 #include <sys/buf.h> 79 #include <sys/exec.h> 80 #include <sys/malloc.h> 81 #include <sys/mbuf.h> 82 #include <sys/mount.h> 83 #include <sys/msgbuf.h> 84 #include <sys/proc.h> 85 #include <sys/reboot.h> 86 #include <sys/syscallargs.h> 87 #include <sys/syslog.h> 88 #include <sys/systm.h> 89 #include <sys/kernel.h> 90 #include <sys/user.h> 91 #include <sys/boot_flag.h> 92 #include <sys/ksyms.h> 93 #include <sys/device.h> 94 95 #include <uvm/uvm_extern.h> 96 97 #include <net/netisr.h> 98 99 #include <prop/proplib.h> 100 101 #include <machine/bus.h> 102 #include <machine/powerpc.h> 103 #include <machine/trap.h> 104 #include <machine/walnut.h> 105 106 #include <powerpc/spr.h> 107 #include <powerpc/ibm4xx/dcr405gp.h> 108 109 #include <dev/cons.h> 110 111 #include "ksyms.h" 112 113 #if defined(DDB) 114 #include <machine/db_machdep.h> 115 #include <ddb/db_extern.h> 116 #endif 117 118 119 #define TLB_PG_SIZE (16*1024*1024) 120 121 /* 122 * Global variables used here and there 123 */ 124 struct vm_map *mb_map = NULL; 125 struct vm_map *phys_map = NULL; 126 127 /* 128 * This should probably be in autoconf! XXX 129 */ 130 char cpu_model[80]; 131 char machine[] = MACHINE; /* from <machine/param.h> */ 132 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 133 134 char bootpath[256]; 135 paddr_t msgbuf_paddr; 136 vaddr_t msgbuf_vaddr; 137 138 #if NKSYMS || defined(DDB) || defined(MODULAR) 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 memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr); 208 209 curpcb = &lwp0.laddr->u_pcb; 210 curpcb->pcb_pm = pmap_kernel(); 211 212 /* 213 * Set up trap vectors 214 */ 215 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 216 switch (exc) { 217 default: 218 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 219 break; 220 case EXC_EXI: 221 /* 222 * This one is (potentially) installed during autoconf 223 */ 224 break; 225 case EXC_SC: 226 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 227 break; 228 case EXC_ALI: 229 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 230 break; 231 case EXC_DSI: 232 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 233 break; 234 case EXC_ISI: 235 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 236 break; 237 case EXC_MCHK: 238 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 239 break; 240 case EXC_ITMISS: 241 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 242 (size_t)&tlbim4size); 243 break; 244 case EXC_DTMISS: 245 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 246 (size_t)&tlbdm4size); 247 break; 248 /* 249 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 250 * are spaced by 0x10 bytes only.. 251 */ 252 case EXC_PIT: 253 memcpy((void *)EXC_PIT, &pitfitwdog, 254 (size_t)&pitfitwdogsize); 255 break; 256 case EXC_DEBUG: 257 memcpy((void *)EXC_DEBUG, &debugtrap, 258 (size_t)&debugsize); 259 break; 260 case EXC_DTMISS|EXC_ALI: 261 /* PPC405GP Rev D errata item 51 */ 262 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 263 (size_t)&errata51size); 264 break; 265 #if defined(DDB) || defined(IPKDB) 266 case EXC_PGM: 267 #if defined(DDB) 268 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 269 #elif defined(IPKDB) 270 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 271 #endif 272 #endif /* DDB | IPKDB */ 273 break; 274 } 275 276 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 277 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 278 279 consinit(); 280 281 /* Handle trap instruction as PGM exception */ 282 __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 283 __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 284 285 /* 286 * external interrupt handler install 287 */ 288 install_extint(ext_intr); 289 290 /* 291 * Now enable translation (and machine checks/recoverable interrupts). 292 */ 293 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 294 : : "r"(0), "K"(PSL_IR|PSL_DR)); 295 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 296 297 uvm_setpagesize(); 298 299 /* 300 * Initialize pmap module. 301 */ 302 pmap_bootstrap(startkernel, endkernel); 303 304 #ifdef DEBUG 305 printf("Board config data:\n"); 306 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 307 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 308 printf(" mem_size = %u\n", board_data.mem_size); 309 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 310 board_data.mac_address_local[0], board_data.mac_address_local[1], 311 board_data.mac_address_local[2], board_data.mac_address_local[3], 312 board_data.mac_address_local[4], board_data.mac_address_local[5]); 313 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 314 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 315 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 316 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 317 printf(" processor_speed = %u\n", board_data.processor_speed); 318 printf(" plb_speed = %u\n", board_data.plb_speed); 319 printf(" pci_speed = %u\n", board_data.pci_speed); 320 #endif 321 322 #if NKSYMS || defined(DDB) || defined(MODULAR) 323 ksyms_addsyms_elf((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 324 #endif 325 #ifdef DDB 326 if (boothowto & RB_KDB) 327 Debugger(); 328 #endif 329 #ifdef IPKDB 330 /* 331 * Now trap to IPKDB 332 */ 333 ipkdb_init(); 334 if (boothowto & RB_KDB) 335 ipkdb_connect(0); 336 #endif 337 } 338 339 static void 340 install_extint(void (*handler)(void)) 341 { 342 extern int extint, extsize; 343 extern u_long extint_call; 344 u_long offset = (u_long)handler - (u_long)&extint_call; 345 int msr; 346 347 #ifdef DIAGNOSTIC 348 if (offset > 0x1ffffff) 349 panic("install_extint: too far away"); 350 #endif 351 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 352 extint_call = (extint_call & 0xfc000003) | offset; 353 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 354 __syncicache((void *)&extint_call, sizeof extint_call); 355 __syncicache((void *)EXC_EXI, (int)&extsize); 356 __asm volatile ("mtmsr %0" :: "r"(msr)); 357 } 358 359 /* 360 * Machine dependent startup code. 361 */ 362 363 char msgbuf[MSGBUFSIZE]; 364 365 void 366 cpu_startup(void) 367 { 368 vaddr_t minaddr, maxaddr; 369 prop_number_t pn; 370 prop_data_t pd; 371 char pbuf[9]; 372 373 /* 374 * Initialize error message buffer (at end of core). 375 */ 376 #if 0 /* For some reason this fails... --Artem 377 * Besides, do we really have to put it at the end of core? 378 * Let's use static buffer for now 379 */ 380 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 0, 381 UVM_KMF_VAONLY))) 382 panic("startup: no room for message buffer"); 383 for (i = 0; i < btoc(MSGBUFSIZE); i++) 384 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 385 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 0); 386 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 387 #else 388 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 389 #endif 390 391 printf("%s%s", copyright, version); 392 printf("Walnut PowerPC 405GP Evaluation Board\n"); 393 394 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 395 printf("total memory = %s\n", pbuf); 396 397 minaddr = 0; 398 /* 399 * Allocate a submap for physio 400 */ 401 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 402 VM_PHYS_SIZE, 0, false, NULL); 403 404 /* 405 * No need to allocate an mbuf cluster submap. Mbuf clusters 406 * are allocated via the pool allocator, and we use direct-mapped 407 * pool pages. 408 */ 409 410 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 411 printf("avail memory = %s\n", pbuf); 412 413 /* 414 * Set up the board properties dictionary. 415 */ 416 board_properties = prop_dictionary_create(); 417 KASSERT(board_properties != NULL); 418 419 pn = prop_number_create_integer(board_data.mem_size); 420 KASSERT(pn != NULL); 421 if (prop_dictionary_set(board_properties, "mem-size", pn) == false) 422 panic("setting mem-size"); 423 prop_object_release(pn); 424 425 pd = prop_data_create_data_nocopy(board_data.mac_address_local, 426 sizeof(board_data.mac_address_local)); 427 KASSERT(pd != NULL); 428 if (prop_dictionary_set(board_properties, "emac0-mac-addr", 429 pd) == false) 430 panic("setting emac0-mac-addr"); 431 prop_object_release(pd); 432 433 pd = prop_data_create_data_nocopy(board_data.mac_address_pci, 434 sizeof(board_data.mac_address_pci)); 435 KASSERT(pd != NULL); 436 if (prop_dictionary_set(board_properties, "sip0-mac-addr", 437 pd) == false) 438 panic("setting sip0-mac-addr"); 439 prop_object_release(pd); 440 441 pn = prop_number_create_integer(board_data.processor_speed); 442 KASSERT(pn != NULL); 443 if (prop_dictionary_set(board_properties, "processor-frequency", 444 pn) == false) 445 panic("setting processor-frequency"); 446 prop_object_release(pn); 447 448 /* 449 * Now that we have VM, malloc()s are OK in bus_space. 450 */ 451 bus_space_mallocok(); 452 fake_mapiodev = 0; 453 } 454 455 456 static void 457 dumpsys(void) 458 { 459 460 printf("dumpsys: TBD\n"); 461 } 462 463 /* 464 * Halt or reboot the machine after syncing/dumping according to howto. 465 */ 466 void 467 cpu_reboot(int howto, char *what) 468 { 469 static int syncing; 470 static char str[256]; 471 char *ap = str, *ap1 = ap; 472 473 boothowto = howto; 474 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 475 syncing = 1; 476 vfs_shutdown(); /* sync */ 477 resettodr(); /* set wall clock */ 478 } 479 480 splhigh(); 481 482 if (!cold && (howto & RB_DUMP)) 483 dumpsys(); 484 485 doshutdownhooks(); 486 487 pmf_system_shutdown(boothowto); 488 489 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 490 /* Power off here if we know how...*/ 491 } 492 493 if (howto & RB_HALT) { 494 printf("halted\n\n"); 495 496 goto reboot; /* XXX for now... */ 497 498 #ifdef DDB 499 printf("dropping to debugger\n"); 500 while(1) 501 Debugger(); 502 #endif 503 } 504 505 printf("rebooting\n\n"); 506 if (what && *what) { 507 if (strlen(what) > sizeof str - 5) 508 printf("boot string too large, ignored\n"); 509 else { 510 strcpy(str, what); 511 ap1 = ap = str + strlen(str); 512 *ap++ = ' '; 513 } 514 } 515 *ap++ = '-'; 516 if (howto & RB_SINGLE) 517 *ap++ = 's'; 518 if (howto & RB_KDB) 519 *ap++ = 'd'; 520 *ap++ = 0; 521 if (ap[-2] == '-') 522 *ap1 = 0; 523 524 /* flush cache for msgbuf */ 525 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 526 527 reboot: 528 ppc4xx_reset(); 529 530 printf("ppc4xx_reset() failed!\n"); 531 #ifdef DDB 532 while(1) 533 Debugger(); 534 #else 535 while (1) 536 /* nothing */; 537 #endif 538 } 539 540 int 541 lcsplx(int ipl) 542 { 543 544 return spllower(ipl); /* XXX */ 545 } 546 547 void 548 mem_regions(struct mem_region **mem, struct mem_region **avail) 549 { 550 551 *mem = physmemr; 552 *avail = availmemr; 553 } 554
Indexes created Wed Oct 22 13:09:56 GMT 2025