machdep.c revision 1.51
1 /* $NetBSD: machdep.c,v 1.51 2011/06/18 06:44:28 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 1.51 2011/06/18 06:44:28 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 #include <sys/cpu.h> 95 #include <sys/bus.h> 96 97 #include <uvm/uvm_extern.h> 98 99 #include <net/netisr.h> 100 101 #include <prop/proplib.h> 102 103 #include <machine/powerpc.h> 104 #include <machine/trap.h> 105 #include <machine/walnut.h> 106 #include <machine/pcb.h> 107 108 #include <powerpc/spr.h> 109 #include <powerpc/ibm4xx/spr.h> 110 #include <powerpc/ibm4xx/cpu.h> 111 #include <powerpc/ibm4xx/dcr4xx.h> 112 113 #include <dev/cons.h> 114 #include <dev/pci/pcivar.h> 115 #include <dev/pci/pciconf.h> 116 117 #include "ksyms.h" 118 119 #if defined(DDB) 120 #include <machine/db_machdep.h> 121 #include <ddb/db_extern.h> 122 #endif 123 124 125 #define TLB_PG_SIZE (16*1024*1024) 126 127 /* 128 * Global variables used here and there 129 */ 130 struct vm_map *phys_map = NULL; 131 132 /* 133 * This should probably be in autoconf! XXX 134 */ 135 char cpu_model[80]; 136 char machine[] = MACHINE; /* from <machine/param.h> */ 137 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 138 139 char bootpath[256]; 140 paddr_t msgbuf_paddr; 141 vaddr_t msgbuf_vaddr; 142 143 #if NKSYMS || defined(DDB) || defined(MODULAR) 144 void *startsym, *endsym; 145 #endif 146 147 void initppc(u_int, u_int, char *, void *); 148 149 static void dumpsys(void); 150 static void install_extint(void (*)(void)); 151 152 #define MEMREGIONS 8 153 struct mem_region physmemr[MEMREGIONS]; /* Hard code memory */ 154 struct mem_region availmemr[MEMREGIONS]; /* Who's supposed to set these up? */ 155 156 struct board_cfg_data board_data; 157 158 void 159 initppc(u_int startkernel, u_int endkernel, char *args, void *info_block) 160 { 161 extern int defaulttrap, defaultsize; 162 extern int sctrap, scsize; 163 extern int alitrap, alisize; 164 extern int dsitrap, dsisize; 165 extern int isitrap, isisize; 166 extern int mchktrap, mchksize; 167 extern int tlbimiss4xx, tlbim4size; 168 extern int tlbdmiss4xx, tlbdm4size; 169 extern int pitfitwdog, pitfitwdogsize; 170 extern int debugtrap, debugsize; 171 extern int errata51handler, errata51size; 172 #ifdef DDB 173 extern int ddblow, ddbsize; 174 #endif 175 #ifdef IPKDB 176 extern int ipkdblow, ipkdbsize; 177 #endif 178 vaddr_t va; 179 int exc, dbcr0; 180 struct cpu_info * const ci = curcpu(); 181 182 /* Disable all external interrupts */ 183 mtdcr(DCR_UIC0_BASE + DCR_UIC_ER, 0); 184 185 /* Initialize cache info for memcpy, etc. */ 186 cpu_probe_cache(); 187 188 /* Save info block */ 189 memcpy(&board_data, info_block, sizeof(board_data)); 190 191 memset(physmemr, 0, sizeof physmemr); 192 memset(availmemr, 0, sizeof availmemr); 193 physmemr[0].start = 0; 194 physmemr[0].size = board_data.mem_size & ~PGOFSET; 195 /* Lower memory reserved by eval board BIOS */ 196 availmemr[0].start = startkernel; 197 availmemr[0].size = board_data.mem_size - availmemr[0].start; 198 199 /* Linear map kernel memory */ 200 for (va = 0; va < endkernel; va += TLB_PG_SIZE) 201 ppc4xx_tlb_reserve(va, va, TLB_PG_SIZE, TLB_EX); 202 203 /* Map console after physmem (see pmap_tlbmiss()) */ 204 ppc4xx_tlb_reserve(0xef000000, roundup(physmemr[0].size, TLB_PG_SIZE), 205 TLB_PG_SIZE, TLB_I | TLB_G); 206 207 /* 208 * Initialize lwp0 and current pcb and pmap pointers. 209 */ 210 lwp0.l_cpu = ci; 211 212 curpcb = lwp_getpcb(&lwp0); 213 memset(curpcb, 0, sizeof(struct pcb)); 214 curpcb->pcb_pm = pmap_kernel(); 215 216 /* 217 * Set up trap vectors 218 */ 219 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 220 switch (exc) { 221 default: 222 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 223 break; 224 case EXC_EXI: 225 /* 226 * This one is (potentially) installed during autoconf 227 */ 228 break; 229 case EXC_SC: 230 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 231 break; 232 case EXC_ALI: 233 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 234 break; 235 case EXC_DSI: 236 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 237 break; 238 case EXC_ISI: 239 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 240 break; 241 case EXC_MCHK: 242 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 243 break; 244 case EXC_ITMISS: 245 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 246 (size_t)&tlbim4size); 247 break; 248 case EXC_DTMISS: 249 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 250 (size_t)&tlbdm4size); 251 break; 252 /* 253 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 254 * are spaced by 0x10 bytes only.. 255 */ 256 case EXC_PIT: 257 memcpy((void *)EXC_PIT, &pitfitwdog, 258 (size_t)&pitfitwdogsize); 259 break; 260 case EXC_DEBUG: 261 memcpy((void *)EXC_DEBUG, &debugtrap, 262 (size_t)&debugsize); 263 break; 264 case EXC_DTMISS|EXC_ALI: 265 /* PPC405GP Rev D errata item 51 */ 266 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 267 (size_t)&errata51size); 268 break; 269 #if defined(DDB) || defined(IPKDB) 270 case EXC_PGM: 271 #if defined(DDB) 272 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 273 #elif defined(IPKDB) 274 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 275 #endif 276 #endif /* DDB | IPKDB */ 277 break; 278 } 279 280 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 281 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 282 283 consinit(); 284 285 /* Handle trap instruction as PGM exception */ 286 __asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 287 __asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 288 289 /* 290 * external interrupt handler install 291 */ 292 install_extint(ext_intr); 293 294 /* 295 * Now enable translation (and machine checks/recoverable interrupts). 296 */ 297 __asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 298 : : "r"(0), "K"(PSL_IR|PSL_DR)); 299 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 300 301 uvm_setpagesize(); 302 303 /* 304 * Initialize pmap module. 305 */ 306 pmap_bootstrap(startkernel, endkernel); 307 308 #ifdef DEBUG 309 printf("Board config data:\n"); 310 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 311 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 312 printf(" mem_size = %u\n", board_data.mem_size); 313 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 314 board_data.mac_address_local[0], board_data.mac_address_local[1], 315 board_data.mac_address_local[2], board_data.mac_address_local[3], 316 board_data.mac_address_local[4], board_data.mac_address_local[5]); 317 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 318 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 319 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 320 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 321 printf(" processor_speed = %u\n", board_data.processor_speed); 322 printf(" plb_speed = %u\n", board_data.plb_speed); 323 printf(" pci_speed = %u\n", board_data.pci_speed); 324 #endif 325 326 #if NKSYMS || defined(DDB) || defined(MODULAR) 327 ksyms_addsyms_elf((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 328 #endif 329 #ifdef DDB 330 if (boothowto & RB_KDB) 331 Debugger(); 332 #endif 333 #ifdef IPKDB 334 /* 335 * Now trap to IPKDB 336 */ 337 ipkdb_init(); 338 if (boothowto & RB_KDB) 339 ipkdb_connect(0); 340 #endif 341 342 /* 343 * Look for the ibm4xx modules in the right place. 344 */ 345 module_machine = module_machine_ibm4xx; 346 } 347 348 static void 349 install_extint(void (*handler)(void)) 350 { 351 extern int extint, extsize; 352 extern u_long extint_call; 353 u_long offset = (u_long)handler - (u_long)&extint_call; 354 int msr; 355 356 #ifdef DIAGNOSTIC 357 if (offset > 0x1ffffff) 358 panic("install_extint: too far away"); 359 #endif 360 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 361 extint_call = (extint_call & 0xfc000003) | offset; 362 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 363 __syncicache((void *)&extint_call, sizeof extint_call); 364 __syncicache((void *)EXC_EXI, (int)&extsize); 365 __asm volatile ("mtmsr %0" :: "r"(msr)); 366 } 367 368 /* 369 * Machine dependent startup code. 370 */ 371 372 char msgbuf[MSGBUFSIZE]; 373 374 void 375 cpu_startup(void) 376 { 377 vaddr_t minaddr, maxaddr; 378 prop_number_t pn; 379 prop_data_t pd; 380 char pbuf[9]; 381 382 /* 383 * Initialize error message buffer (at end of core). 384 */ 385 #if 0 /* For some reason this fails... --Artem 386 * Besides, do we really have to put it at the end of core? 387 * Let's use static buffer for now 388 */ 389 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 0, 390 UVM_KMF_VAONLY))) 391 panic("startup: no room for message buffer"); 392 for (i = 0; i < btoc(MSGBUFSIZE); i++) 393 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 394 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 0); 395 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 396 #else 397 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 398 #endif 399 400 printf("%s%s", copyright, version); 401 printf("Walnut PowerPC 405GP Evaluation Board\n"); 402 403 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 404 printf("total memory = %s\n", pbuf); 405 406 minaddr = 0; 407 /* 408 * Allocate a submap for physio 409 */ 410 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 411 VM_PHYS_SIZE, 0, false, NULL); 412 413 /* 414 * No need to allocate an mbuf cluster submap. Mbuf clusters 415 * are allocated via the pool allocator, and we use direct-mapped 416 * pool pages. 417 */ 418 419 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 420 printf("avail memory = %s\n", pbuf); 421 422 /* 423 * Set up the board properties dictionary. 424 */ 425 board_properties = prop_dictionary_create(); 426 KASSERT(board_properties != NULL); 427 428 pn = prop_number_create_integer(board_data.mem_size); 429 KASSERT(pn != NULL); 430 if (prop_dictionary_set(board_properties, "mem-size", pn) == false) 431 panic("setting mem-size"); 432 prop_object_release(pn); 433 434 pd = prop_data_create_data_nocopy(board_data.mac_address_local, 435 sizeof(board_data.mac_address_local)); 436 KASSERT(pd != NULL); 437 if (prop_dictionary_set(board_properties, "emac0-mac-addr", 438 pd) == false) 439 panic("setting emac0-mac-addr"); 440 prop_object_release(pd); 441 442 pd = prop_data_create_data_nocopy(board_data.mac_address_pci, 443 sizeof(board_data.mac_address_pci)); 444 KASSERT(pd != NULL); 445 if (prop_dictionary_set(board_properties, "sip0-mac-addr", 446 pd) == false) 447 panic("setting sip0-mac-addr"); 448 prop_object_release(pd); 449 450 pn = prop_number_create_integer(board_data.processor_speed); 451 KASSERT(pn != NULL); 452 if (prop_dictionary_set(board_properties, "processor-frequency", 453 pn) == false) 454 panic("setting processor-frequency"); 455 prop_object_release(pn); 456 457 /* 458 * Now that we have VM, malloc()s are OK in bus_space. 459 */ 460 bus_space_mallocok(); 461 fake_mapiodev = 0; 462 } 463 464 465 static void 466 dumpsys(void) 467 { 468 469 printf("dumpsys: TBD\n"); 470 } 471 472 /* 473 * Halt or reboot the machine after syncing/dumping according to howto. 474 */ 475 void 476 cpu_reboot(int howto, char *what) 477 { 478 static int syncing; 479 static char str[256]; 480 char *ap = str, *ap1 = ap; 481 482 boothowto = howto; 483 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 484 syncing = 1; 485 vfs_shutdown(); /* sync */ 486 resettodr(); /* set wall clock */ 487 } 488 489 splhigh(); 490 491 if (!cold && (howto & RB_DUMP)) 492 dumpsys(); 493 494 doshutdownhooks(); 495 496 pmf_system_shutdown(boothowto); 497 498 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 499 /* Power off here if we know how...*/ 500 } 501 502 if (howto & RB_HALT) { 503 printf("halted\n\n"); 504 505 goto reboot; /* XXX for now... */ 506 507 #ifdef DDB 508 printf("dropping to debugger\n"); 509 while(1) 510 Debugger(); 511 #endif 512 } 513 514 printf("rebooting\n\n"); 515 if (what && *what) { 516 if (strlen(what) > sizeof str - 5) 517 printf("boot string too large, ignored\n"); 518 else { 519 strcpy(str, what); 520 ap1 = ap = str + strlen(str); 521 *ap++ = ' '; 522 } 523 } 524 *ap++ = '-'; 525 if (howto & RB_SINGLE) 526 *ap++ = 's'; 527 if (howto & RB_KDB) 528 *ap++ = 'd'; 529 *ap++ = 0; 530 if (ap[-2] == '-') 531 *ap1 = 0; 532 533 /* flush cache for msgbuf */ 534 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 535 536 reboot: 537 ppc4xx_reset(); 538 539 printf("ppc4xx_reset() failed!\n"); 540 #ifdef DDB 541 while(1) 542 Debugger(); 543 #else 544 while (1) 545 /* nothing */; 546 #endif 547 } 548 549 void 550 mem_regions(struct mem_region **mem, struct mem_region **avail) 551 { 552 553 *mem = physmemr; 554 *avail = availmemr; 555 } 556 557 558 int 559 pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) 560 { 561 562 /* 563 * Bus number is irrelevant. Configuration Mechanism 1 is in 564 * use, can have devices 0-32 (i.e. the `normal' range). 565 */ 566 return 5; 567 } 568 569 int 570 pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 571 { 572 int pin = pa->pa_intrpin; 573 int dev = pa->pa_device; 574 575 if (pin == 0) 576 /* No IRQ used. */ 577 goto bad; 578 579 if (pin > 4) { 580 printf("pci_intr_map: bad interrupt pin %d\n", pin); 581 goto bad; 582 } 583 584 /* 585 * We need to map the interrupt pin to the interrupt bit in the UIC 586 * associated with it. This is highly machine-dependent. 587 */ 588 switch(dev) { 589 case 1: 590 case 2: 591 case 3: 592 case 4: 593 *ihp = 27 + dev; 594 break; 595 default: 596 printf("Hmm.. PCI device %d should not exist on this board\n", 597 dev); 598 goto bad; 599 } 600 return 0; 601 602 bad: 603 *ihp = -1; 604 return 1; 605 } 606 607 void 608 pci_conf_interrupt(pci_chipset_tag_t pc, int bus, int dev, int pin, 609 int swiz, int *iline) 610 { 611 612 if (bus == 0) 613 switch(dev) { 614 case 1: 615 case 2: 616 case 3: 617 case 4: 618 *iline = 31 - dev; 619 } 620 else 621 *iline = 20 + ((swiz + dev + 1) & 3); 622 } 623
Indexes created Thu Oct 02 14:10:14 GMT 2025