machdep.c revision 1.49
1 /* $NetBSD: machdep.c,v 1.49 2011/06/12 03:42:42 mrg 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 1.49 2011/06/12 03:42:42 mrg 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/boot_flag.h> 91 #include <sys/ksyms.h> 92 #include <sys/device.h> 93 #include <sys/module.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 #include <machine/pcb.h> 106 107 #include <powerpc/spr.h> 108 #include <powerpc/ibm4xx/spr.h> 109 #include <powerpc/ibm4xx/dcr4xx.h> 110 111 #include <dev/cons.h> 112 #include <dev/pci/pcivar.h> 113 #include <dev/pci/pciconf.h> 114 115 #include "ksyms.h" 116 117 #if defined(DDB) 118 #include <machine/db_machdep.h> 119 #include <ddb/db_extern.h> 120 #endif 121 122 123 #define TLB_PG_SIZE (16*1024*1024) 124 125 /* 126 * Global variables used here and there 127 */ 128 struct vm_map *phys_map = NULL; 129 130 /* 131 * This should probably be in autoconf! XXX 132 */ 133 char cpu_model[80]; 134 char machine[] = MACHINE; /* from <machine/param.h> */ 135 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 136 137 char bootpath[256]; 138 paddr_t msgbuf_paddr; 139 vaddr_t msgbuf_vaddr; 140 141 #if NKSYMS || defined(DDB) || defined(MODULAR) 142 void *startsym, *endsym; 143 #endif 144 145 int lcsplx(int); 146 void initppc(u_int, u_int, char *, void *); 147 148 static void dumpsys(void); 149 static void install_extint(void (*)(void)); 150 151 #define MEMREGIONS 8 152 struct mem_region physmemr[MEMREGIONS]; /* Hard code memory */ 153 struct mem_region availmemr[MEMREGIONS]; /* Who's supposed to set these up? */ 154 155 struct board_cfg_data board_data; 156 157 void 158 initppc(u_int startkernel, u_int endkernel, char *args, void *info_block) 159 { 160 extern int defaulttrap, defaultsize; 161 extern int sctrap, scsize; 162 extern int alitrap, alisize; 163 extern int dsitrap, dsisize; 164 extern int isitrap, isisize; 165 extern int mchktrap, mchksize; 166 extern int tlbimiss4xx, tlbim4size; 167 extern int tlbdmiss4xx, tlbdm4size; 168 extern int pitfitwdog, pitfitwdogsize; 169 extern int debugtrap, debugsize; 170 extern int errata51handler, errata51size; 171 #ifdef DDB 172 extern int ddblow, ddbsize; 173 #endif 174 #ifdef IPKDB 175 extern int ipkdblow, ipkdbsize; 176 #endif 177 vaddr_t va; 178 int exc, dbcr0; 179 struct cpu_info * const ci = curcpu(); 180 181 /* Disable all external interrupts */ 182 mtdcr(DCR_UIC0_BASE + DCR_UIC_ER, 0); 183 184 /* Initialize cache info for memcpy, etc. */ 185 cpu_probe_cache(); 186 187 /* Save info block */ 188 memcpy(&board_data, info_block, sizeof(board_data)); 189 190 memset(physmemr, 0, sizeof physmemr); 191 memset(availmemr, 0, sizeof availmemr); 192 physmemr[0].start = 0; 193 physmemr[0].size = board_data.mem_size & ~PGOFSET; 194 /* Lower memory reserved by eval board BIOS */ 195 availmemr[0].start = startkernel; 196 availmemr[0].size = board_data.mem_size - availmemr[0].start; 197 198 /* Linear map kernel memory */ 199 for (va = 0; va < endkernel; va += TLB_PG_SIZE) 200 ppc4xx_tlb_reserve(va, va, TLB_PG_SIZE, TLB_EX); 201 202 /* Map console after physmem (see pmap_tlbmiss()) */ 203 ppc4xx_tlb_reserve(0xef000000, roundup(physmemr[0].size, TLB_PG_SIZE), 204 TLB_PG_SIZE, TLB_I | TLB_G); 205 206 /* 207 * Initialize lwp0 and current pcb and pmap pointers. 208 */ 209 lwp0.l_cpu = ci; 210 211 curpcb = lwp_getpcb(&lwp0); 212 memset(curpcb, 0, sizeof(struct pcb)); 213 curpcb->pcb_pm = pmap_kernel(); 214 215 /* 216 * Set up trap vectors 217 */ 218 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 219 switch (exc) { 220 default: 221 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 222 break; 223 case EXC_EXI: 224 /* 225 * This one is (potentially) installed during autoconf 226 */ 227 break; 228 case EXC_SC: 229 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 230 break; 231 case EXC_ALI: 232 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 233 break; 234 case EXC_DSI: 235 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 236 break; 237 case EXC_ISI: 238 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 239 break; 240 case EXC_MCHK: 241 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 242 break; 243 case EXC_ITMISS: 244 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 245 (size_t)&tlbim4size); 246 break; 247 case EXC_DTMISS: 248 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 249 (size_t)&tlbdm4size); 250 break; 251 /* 252 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 253 * are spaced by 0x10 bytes only.. 254 */ 255 case EXC_PIT: 256 memcpy((void *)EXC_PIT, &pitfitwdog, 257 (size_t)&pitfitwdogsize); 258 break; 259 case EXC_DEBUG: 260 memcpy((void *)EXC_DEBUG, &debugtrap, 261 (size_t)&debugsize); 262 break; 263 case EXC_DTMISS|EXC_ALI: 264 /* PPC405GP Rev D errata item 51 */ 265 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 266 (size_t)&errata51size); 267 break; 268 #if defined(DDB) || defined(IPKDB) 269 case EXC_PGM: 270 #if defined(DDB) 271 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 272 #elif defined(IPKDB) 273 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 274 #endif 275 #endif /* DDB | IPKDB */ 276 break; 277 } 278 279 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 280 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 281 282 consinit(); 283 284 /* Handle trap instruction as PGM exception */ 285 __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 286 __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 287 288 /* 289 * external interrupt handler install 290 */ 291 install_extint(ext_intr); 292 293 /* 294 * Now enable translation (and machine checks/recoverable interrupts). 295 */ 296 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 297 : : "r"(0), "K"(PSL_IR|PSL_DR)); 298 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 299 300 uvm_setpagesize(); 301 302 /* 303 * Initialize pmap module. 304 */ 305 pmap_bootstrap(startkernel, endkernel); 306 307 #ifdef DEBUG 308 printf("Board config data:\n"); 309 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 310 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 311 printf(" mem_size = %u\n", board_data.mem_size); 312 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 313 board_data.mac_address_local[0], board_data.mac_address_local[1], 314 board_data.mac_address_local[2], board_data.mac_address_local[3], 315 board_data.mac_address_local[4], board_data.mac_address_local[5]); 316 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 317 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 318 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 319 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 320 printf(" processor_speed = %u\n", board_data.processor_speed); 321 printf(" plb_speed = %u\n", board_data.plb_speed); 322 printf(" pci_speed = %u\n", board_data.pci_speed); 323 #endif 324 325 #if NKSYMS || defined(DDB) || defined(MODULAR) 326 ksyms_addsyms_elf((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 327 #endif 328 #ifdef DDB 329 if (boothowto & RB_KDB) 330 Debugger(); 331 #endif 332 #ifdef IPKDB 333 /* 334 * Now trap to IPKDB 335 */ 336 ipkdb_init(); 337 if (boothowto & RB_KDB) 338 ipkdb_connect(0); 339 #endif 340 341 /* 342 * Look for the ibm4xx modules in the right place. 343 */ 344 module_machine = module_machine_ibm4xx; 345 } 346 347 static void 348 install_extint(void (*handler)(void)) 349 { 350 extern int extint, extsize; 351 extern u_long extint_call; 352 u_long offset = (u_long)handler - (u_long)&extint_call; 353 int msr; 354 355 #ifdef DIAGNOSTIC 356 if (offset > 0x1ffffff) 357 panic("install_extint: too far away"); 358 #endif 359 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 360 extint_call = (extint_call & 0xfc000003) | offset; 361 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 362 __syncicache((void *)&extint_call, sizeof extint_call); 363 __syncicache((void *)EXC_EXI, (int)&extsize); 364 __asm volatile ("mtmsr %0" :: "r"(msr)); 365 } 366 367 /* 368 * Machine dependent startup code. 369 */ 370 371 char msgbuf[MSGBUFSIZE]; 372 373 void 374 cpu_startup(void) 375 { 376 vaddr_t minaddr, maxaddr; 377 prop_number_t pn; 378 prop_data_t pd; 379 char pbuf[9]; 380 381 /* 382 * Initialize error message buffer (at end of core). 383 */ 384 #if 0 /* For some reason this fails... --Artem 385 * Besides, do we really have to put it at the end of core? 386 * Let's use static buffer for now 387 */ 388 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 0, 389 UVM_KMF_VAONLY))) 390 panic("startup: no room for message buffer"); 391 for (i = 0; i < btoc(MSGBUFSIZE); i++) 392 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 393 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 0); 394 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 395 #else 396 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 397 #endif 398 399 printf("%s%s", copyright, version); 400 printf("Walnut PowerPC 405GP Evaluation Board\n"); 401 402 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 403 printf("total memory = %s\n", pbuf); 404 405 minaddr = 0; 406 /* 407 * Allocate a submap for physio 408 */ 409 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 410 VM_PHYS_SIZE, 0, false, NULL); 411 412 /* 413 * No need to allocate an mbuf cluster submap. Mbuf clusters 414 * are allocated via the pool allocator, and we use direct-mapped 415 * pool pages. 416 */ 417 418 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 419 printf("avail memory = %s\n", pbuf); 420 421 /* 422 * Set up the board properties dictionary. 423 */ 424 board_properties = prop_dictionary_create(); 425 KASSERT(board_properties != NULL); 426 427 pn = prop_number_create_integer(board_data.mem_size); 428 KASSERT(pn != NULL); 429 if (prop_dictionary_set(board_properties, "mem-size", pn) == false) 430 panic("setting mem-size"); 431 prop_object_release(pn); 432 433 pd = prop_data_create_data_nocopy(board_data.mac_address_local, 434 sizeof(board_data.mac_address_local)); 435 KASSERT(pd != NULL); 436 if (prop_dictionary_set(board_properties, "emac0-mac-addr", 437 pd) == false) 438 panic("setting emac0-mac-addr"); 439 prop_object_release(pd); 440 441 pd = prop_data_create_data_nocopy(board_data.mac_address_pci, 442 sizeof(board_data.mac_address_pci)); 443 KASSERT(pd != NULL); 444 if (prop_dictionary_set(board_properties, "sip0-mac-addr", 445 pd) == false) 446 panic("setting sip0-mac-addr"); 447 prop_object_release(pd); 448 449 pn = prop_number_create_integer(board_data.processor_speed); 450 KASSERT(pn != NULL); 451 if (prop_dictionary_set(board_properties, "processor-frequency", 452 pn) == false) 453 panic("setting processor-frequency"); 454 prop_object_release(pn); 455 456 /* 457 * Now that we have VM, malloc()s are OK in bus_space. 458 */ 459 bus_space_mallocok(); 460 fake_mapiodev = 0; 461 } 462 463 464 static void 465 dumpsys(void) 466 { 467 468 printf("dumpsys: TBD\n"); 469 } 470 471 /* 472 * Halt or reboot the machine after syncing/dumping according to howto. 473 */ 474 void 475 cpu_reboot(int howto, char *what) 476 { 477 static int syncing; 478 static char str[256]; 479 char *ap = str, *ap1 = ap; 480 481 boothowto = howto; 482 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 483 syncing = 1; 484 vfs_shutdown(); /* sync */ 485 resettodr(); /* set wall clock */ 486 } 487 488 splhigh(); 489 490 if (!cold && (howto & RB_DUMP)) 491 dumpsys(); 492 493 doshutdownhooks(); 494 495 pmf_system_shutdown(boothowto); 496 497 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 498 /* Power off here if we know how...*/ 499 } 500 501 if (howto & RB_HALT) { 502 printf("halted\n\n"); 503 504 goto reboot; /* XXX for now... */ 505 506 #ifdef DDB 507 printf("dropping to debugger\n"); 508 while(1) 509 Debugger(); 510 #endif 511 } 512 513 printf("rebooting\n\n"); 514 if (what && *what) { 515 if (strlen(what) > sizeof str - 5) 516 printf("boot string too large, ignored\n"); 517 else { 518 strcpy(str, what); 519 ap1 = ap = str + strlen(str); 520 *ap++ = ' '; 521 } 522 } 523 *ap++ = '-'; 524 if (howto & RB_SINGLE) 525 *ap++ = 's'; 526 if (howto & RB_KDB) 527 *ap++ = 'd'; 528 *ap++ = 0; 529 if (ap[-2] == '-') 530 *ap1 = 0; 531 532 /* flush cache for msgbuf */ 533 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 534 535 reboot: 536 ppc4xx_reset(); 537 538 printf("ppc4xx_reset() failed!\n"); 539 #ifdef DDB 540 while(1) 541 Debugger(); 542 #else 543 while (1) 544 /* nothing */; 545 #endif 546 } 547 548 int 549 lcsplx(int ipl) 550 { 551 552 return spllower(ipl); /* XXX */ 553 } 554 555 void 556 mem_regions(struct mem_region **mem, struct mem_region **avail) 557 { 558 559 *mem = physmemr; 560 *avail = availmemr; 561 } 562 563 564 int 565 pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) 566 { 567 568 /* 569 * Bus number is irrelevant. Configuration Mechanism 1 is in 570 * use, can have devices 0-32 (i.e. the `normal' range). 571 */ 572 return 5; 573 } 574 575 int 576 pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 577 { 578 int pin = pa->pa_intrpin; 579 int dev = pa->pa_device; 580 581 if (pin == 0) 582 /* No IRQ used. */ 583 goto bad; 584 585 if (pin > 4) { 586 printf("pci_intr_map: bad interrupt pin %d\n", pin); 587 goto bad; 588 } 589 590 /* 591 * We need to map the interrupt pin to the interrupt bit in the UIC 592 * associated with it. This is highly machine-dependent. 593 */ 594 switch(dev) { 595 case 1: 596 case 2: 597 case 3: 598 case 4: 599 *ihp = 27 + dev; 600 break; 601 default: 602 printf("Hmm.. PCI device %d should not exist on this board\n", 603 dev); 604 goto bad; 605 } 606 return 0; 607 608 bad: 609 *ihp = -1; 610 return 1; 611 } 612 613 void 614 pci_conf_interrupt(pci_chipset_tag_t pc, int bus, int dev, int pin, 615 int swiz, int *iline) 616 { 617 618 if (bus == 0) 619 switch(dev) { 620 case 1: 621 case 2: 622 case 3: 623 case 4: 624 *iline = 31 - dev; 625 } 626 else 627 *iline = 20 + ((swiz + dev + 1) & 3); 628 } 629
Indexes created Fri Oct 03 02:09:57 GMT 2025