machdep.c revision 1.50
1 /* $NetBSD: machdep.c,v 1.50 2011/06/15 05:50:49 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 1.50 2011/06/15 05:50:49 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/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 void initppc(u_int, u_int, char *, void *); 146 147 static void dumpsys(void); 148 static void install_extint(void (*)(void)); 149 150 #define MEMREGIONS 8 151 struct mem_region physmemr[MEMREGIONS]; /* Hard code memory */ 152 struct mem_region availmemr[MEMREGIONS]; /* Who's supposed to set these up? */ 153 154 struct board_cfg_data board_data; 155 156 void 157 initppc(u_int startkernel, u_int endkernel, char *args, void *info_block) 158 { 159 extern int defaulttrap, defaultsize; 160 extern int sctrap, scsize; 161 extern int alitrap, alisize; 162 extern int dsitrap, dsisize; 163 extern int isitrap, isisize; 164 extern int mchktrap, mchksize; 165 extern int tlbimiss4xx, tlbim4size; 166 extern int tlbdmiss4xx, tlbdm4size; 167 extern int pitfitwdog, pitfitwdogsize; 168 extern int debugtrap, debugsize; 169 extern int errata51handler, errata51size; 170 #ifdef DDB 171 extern int ddblow, ddbsize; 172 #endif 173 #ifdef IPKDB 174 extern int ipkdblow, ipkdbsize; 175 #endif 176 vaddr_t va; 177 int exc, dbcr0; 178 struct cpu_info * const ci = curcpu(); 179 180 /* Disable all external interrupts */ 181 mtdcr(DCR_UIC0_BASE + DCR_UIC_ER, 0); 182 183 /* Initialize cache info for memcpy, etc. */ 184 cpu_probe_cache(); 185 186 /* Save info block */ 187 memcpy(&board_data, info_block, sizeof(board_data)); 188 189 memset(physmemr, 0, sizeof physmemr); 190 memset(availmemr, 0, sizeof availmemr); 191 physmemr[0].start = 0; 192 physmemr[0].size = board_data.mem_size & ~PGOFSET; 193 /* Lower memory reserved by eval board BIOS */ 194 availmemr[0].start = startkernel; 195 availmemr[0].size = board_data.mem_size - availmemr[0].start; 196 197 /* Linear map kernel memory */ 198 for (va = 0; va < endkernel; va += TLB_PG_SIZE) 199 ppc4xx_tlb_reserve(va, va, TLB_PG_SIZE, TLB_EX); 200 201 /* Map console after physmem (see pmap_tlbmiss()) */ 202 ppc4xx_tlb_reserve(0xef000000, roundup(physmemr[0].size, TLB_PG_SIZE), 203 TLB_PG_SIZE, TLB_I | TLB_G); 204 205 /* 206 * Initialize lwp0 and current pcb and pmap pointers. 207 */ 208 lwp0.l_cpu = ci; 209 210 curpcb = lwp_getpcb(&lwp0); 211 memset(curpcb, 0, sizeof(struct pcb)); 212 curpcb->pcb_pm = pmap_kernel(); 213 214 /* 215 * Set up trap vectors 216 */ 217 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 218 switch (exc) { 219 default: 220 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 221 break; 222 case EXC_EXI: 223 /* 224 * This one is (potentially) installed during autoconf 225 */ 226 break; 227 case EXC_SC: 228 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 229 break; 230 case EXC_ALI: 231 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 232 break; 233 case EXC_DSI: 234 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 235 break; 236 case EXC_ISI: 237 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 238 break; 239 case EXC_MCHK: 240 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 241 break; 242 case EXC_ITMISS: 243 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 244 (size_t)&tlbim4size); 245 break; 246 case EXC_DTMISS: 247 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 248 (size_t)&tlbdm4size); 249 break; 250 /* 251 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 252 * are spaced by 0x10 bytes only.. 253 */ 254 case EXC_PIT: 255 memcpy((void *)EXC_PIT, &pitfitwdog, 256 (size_t)&pitfitwdogsize); 257 break; 258 case EXC_DEBUG: 259 memcpy((void *)EXC_DEBUG, &debugtrap, 260 (size_t)&debugsize); 261 break; 262 case EXC_DTMISS|EXC_ALI: 263 /* PPC405GP Rev D errata item 51 */ 264 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 265 (size_t)&errata51size); 266 break; 267 #if defined(DDB) || defined(IPKDB) 268 case EXC_PGM: 269 #if defined(DDB) 270 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 271 #elif defined(IPKDB) 272 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 273 #endif 274 #endif /* DDB | IPKDB */ 275 break; 276 } 277 278 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 279 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 280 281 consinit(); 282 283 /* Handle trap instruction as PGM exception */ 284 __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 285 __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 286 287 /* 288 * external interrupt handler install 289 */ 290 install_extint(ext_intr); 291 292 /* 293 * Now enable translation (and machine checks/recoverable interrupts). 294 */ 295 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 296 : : "r"(0), "K"(PSL_IR|PSL_DR)); 297 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 298 299 uvm_setpagesize(); 300 301 /* 302 * Initialize pmap module. 303 */ 304 pmap_bootstrap(startkernel, endkernel); 305 306 #ifdef DEBUG 307 printf("Board config data:\n"); 308 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 309 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 310 printf(" mem_size = %u\n", board_data.mem_size); 311 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 312 board_data.mac_address_local[0], board_data.mac_address_local[1], 313 board_data.mac_address_local[2], board_data.mac_address_local[3], 314 board_data.mac_address_local[4], board_data.mac_address_local[5]); 315 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 316 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 317 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 318 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 319 printf(" processor_speed = %u\n", board_data.processor_speed); 320 printf(" plb_speed = %u\n", board_data.plb_speed); 321 printf(" pci_speed = %u\n", board_data.pci_speed); 322 #endif 323 324 #if NKSYMS || defined(DDB) || defined(MODULAR) 325 ksyms_addsyms_elf((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 326 #endif 327 #ifdef DDB 328 if (boothowto & RB_KDB) 329 Debugger(); 330 #endif 331 #ifdef IPKDB 332 /* 333 * Now trap to IPKDB 334 */ 335 ipkdb_init(); 336 if (boothowto & RB_KDB) 337 ipkdb_connect(0); 338 #endif 339 340 /* 341 * Look for the ibm4xx modules in the right place. 342 */ 343 module_machine = module_machine_ibm4xx; 344 } 345 346 static void 347 install_extint(void (*handler)(void)) 348 { 349 extern int extint, extsize; 350 extern u_long extint_call; 351 u_long offset = (u_long)handler - (u_long)&extint_call; 352 int msr; 353 354 #ifdef DIAGNOSTIC 355 if (offset > 0x1ffffff) 356 panic("install_extint: too far away"); 357 #endif 358 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 359 extint_call = (extint_call & 0xfc000003) | offset; 360 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 361 __syncicache((void *)&extint_call, sizeof extint_call); 362 __syncicache((void *)EXC_EXI, (int)&extsize); 363 __asm volatile ("mtmsr %0" :: "r"(msr)); 364 } 365 366 /* 367 * Machine dependent startup code. 368 */ 369 370 char msgbuf[MSGBUFSIZE]; 371 372 void 373 cpu_startup(void) 374 { 375 vaddr_t minaddr, maxaddr; 376 prop_number_t pn; 377 prop_data_t pd; 378 char pbuf[9]; 379 380 /* 381 * Initialize error message buffer (at end of core). 382 */ 383 #if 0 /* For some reason this fails... --Artem 384 * Besides, do we really have to put it at the end of core? 385 * Let's use static buffer for now 386 */ 387 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 0, 388 UVM_KMF_VAONLY))) 389 panic("startup: no room for message buffer"); 390 for (i = 0; i < btoc(MSGBUFSIZE); i++) 391 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 392 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 0); 393 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 394 #else 395 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 396 #endif 397 398 printf("%s%s", copyright, version); 399 printf("Walnut PowerPC 405GP Evaluation Board\n"); 400 401 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 402 printf("total memory = %s\n", pbuf); 403 404 minaddr = 0; 405 /* 406 * Allocate a submap for physio 407 */ 408 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 409 VM_PHYS_SIZE, 0, false, NULL); 410 411 /* 412 * No need to allocate an mbuf cluster submap. Mbuf clusters 413 * are allocated via the pool allocator, and we use direct-mapped 414 * pool pages. 415 */ 416 417 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 418 printf("avail memory = %s\n", pbuf); 419 420 /* 421 * Set up the board properties dictionary. 422 */ 423 board_properties = prop_dictionary_create(); 424 KASSERT(board_properties != NULL); 425 426 pn = prop_number_create_integer(board_data.mem_size); 427 KASSERT(pn != NULL); 428 if (prop_dictionary_set(board_properties, "mem-size", pn) == false) 429 panic("setting mem-size"); 430 prop_object_release(pn); 431 432 pd = prop_data_create_data_nocopy(board_data.mac_address_local, 433 sizeof(board_data.mac_address_local)); 434 KASSERT(pd != NULL); 435 if (prop_dictionary_set(board_properties, "emac0-mac-addr", 436 pd) == false) 437 panic("setting emac0-mac-addr"); 438 prop_object_release(pd); 439 440 pd = prop_data_create_data_nocopy(board_data.mac_address_pci, 441 sizeof(board_data.mac_address_pci)); 442 KASSERT(pd != NULL); 443 if (prop_dictionary_set(board_properties, "sip0-mac-addr", 444 pd) == false) 445 panic("setting sip0-mac-addr"); 446 prop_object_release(pd); 447 448 pn = prop_number_create_integer(board_data.processor_speed); 449 KASSERT(pn != NULL); 450 if (prop_dictionary_set(board_properties, "processor-frequency", 451 pn) == false) 452 panic("setting processor-frequency"); 453 prop_object_release(pn); 454 455 /* 456 * Now that we have VM, malloc()s are OK in bus_space. 457 */ 458 bus_space_mallocok(); 459 fake_mapiodev = 0; 460 } 461 462 463 static void 464 dumpsys(void) 465 { 466 467 printf("dumpsys: TBD\n"); 468 } 469 470 /* 471 * Halt or reboot the machine after syncing/dumping according to howto. 472 */ 473 void 474 cpu_reboot(int howto, char *what) 475 { 476 static int syncing; 477 static char str[256]; 478 char *ap = str, *ap1 = ap; 479 480 boothowto = howto; 481 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 482 syncing = 1; 483 vfs_shutdown(); /* sync */ 484 resettodr(); /* set wall clock */ 485 } 486 487 splhigh(); 488 489 if (!cold && (howto & RB_DUMP)) 490 dumpsys(); 491 492 doshutdownhooks(); 493 494 pmf_system_shutdown(boothowto); 495 496 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 497 /* Power off here if we know how...*/ 498 } 499 500 if (howto & RB_HALT) { 501 printf("halted\n\n"); 502 503 goto reboot; /* XXX for now... */ 504 505 #ifdef DDB 506 printf("dropping to debugger\n"); 507 while(1) 508 Debugger(); 509 #endif 510 } 511 512 printf("rebooting\n\n"); 513 if (what && *what) { 514 if (strlen(what) > sizeof str - 5) 515 printf("boot string too large, ignored\n"); 516 else { 517 strcpy(str, what); 518 ap1 = ap = str + strlen(str); 519 *ap++ = ' '; 520 } 521 } 522 *ap++ = '-'; 523 if (howto & RB_SINGLE) 524 *ap++ = 's'; 525 if (howto & RB_KDB) 526 *ap++ = 'd'; 527 *ap++ = 0; 528 if (ap[-2] == '-') 529 *ap1 = 0; 530 531 /* flush cache for msgbuf */ 532 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 533 534 reboot: 535 ppc4xx_reset(); 536 537 printf("ppc4xx_reset() failed!\n"); 538 #ifdef DDB 539 while(1) 540 Debugger(); 541 #else 542 while (1) 543 /* nothing */; 544 #endif 545 } 546 547 void 548 mem_regions(struct mem_region **mem, struct mem_region **avail) 549 { 550 551 *mem = physmemr; 552 *avail = availmemr; 553 } 554 555 556 int 557 pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) 558 { 559 560 /* 561 * Bus number is irrelevant. Configuration Mechanism 1 is in 562 * use, can have devices 0-32 (i.e. the `normal' range). 563 */ 564 return 5; 565 } 566 567 int 568 pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 569 { 570 int pin = pa->pa_intrpin; 571 int dev = pa->pa_device; 572 573 if (pin == 0) 574 /* No IRQ used. */ 575 goto bad; 576 577 if (pin > 4) { 578 printf("pci_intr_map: bad interrupt pin %d\n", pin); 579 goto bad; 580 } 581 582 /* 583 * We need to map the interrupt pin to the interrupt bit in the UIC 584 * associated with it. This is highly machine-dependent. 585 */ 586 switch(dev) { 587 case 1: 588 case 2: 589 case 3: 590 case 4: 591 *ihp = 27 + dev; 592 break; 593 default: 594 printf("Hmm.. PCI device %d should not exist on this board\n", 595 dev); 596 goto bad; 597 } 598 return 0; 599 600 bad: 601 *ihp = -1; 602 return 1; 603 } 604 605 void 606 pci_conf_interrupt(pci_chipset_tag_t pc, int bus, int dev, int pin, 607 int swiz, int *iline) 608 { 609 610 if (bus == 0) 611 switch(dev) { 612 case 1: 613 case 2: 614 case 3: 615 case 4: 616 *iline = 31 - dev; 617 } 618 else 619 *iline = 20 + ((swiz + dev + 1) & 3); 620 } 621
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