machdep.c revision 1.48
1 /* $NetBSD: machdep.c,v 1.48 2011/04/04 20:37:50 dyoung 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 1.48 2011/04/04 20:37:50 dyoung 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 94 #include <uvm/uvm_extern.h> 95 96 #include <net/netisr.h> 97 98 #include <prop/proplib.h> 99 100 #include <machine/bus.h> 101 #include <machine/powerpc.h> 102 #include <machine/trap.h> 103 #include <machine/walnut.h> 104 #include <machine/pcb.h> 105 106 #include <powerpc/spr.h> 107 #include <powerpc/ibm4xx/spr.h> 108 #include <powerpc/ibm4xx/dcr4xx.h> 109 110 #include <dev/cons.h> 111 #include <dev/pci/pcivar.h> 112 #include <dev/pci/pciconf.h> 113 114 #include "ksyms.h" 115 116 #if defined(DDB) 117 #include <machine/db_machdep.h> 118 #include <ddb/db_extern.h> 119 #endif 120 121 122 #define TLB_PG_SIZE (16*1024*1024) 123 124 /* 125 * Global variables used here and there 126 */ 127 struct vm_map *phys_map = NULL; 128 129 /* 130 * This should probably be in autoconf! XXX 131 */ 132 char cpu_model[80]; 133 char machine[] = MACHINE; /* from <machine/param.h> */ 134 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 135 136 char bootpath[256]; 137 paddr_t msgbuf_paddr; 138 vaddr_t msgbuf_vaddr; 139 140 #if NKSYMS || defined(DDB) || defined(MODULAR) 141 void *startsym, *endsym; 142 #endif 143 144 int lcsplx(int); 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 static void 342 install_extint(void (*handler)(void)) 343 { 344 extern int extint, extsize; 345 extern u_long extint_call; 346 u_long offset = (u_long)handler - (u_long)&extint_call; 347 int msr; 348 349 #ifdef DIAGNOSTIC 350 if (offset > 0x1ffffff) 351 panic("install_extint: too far away"); 352 #endif 353 __asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 354 extint_call = (extint_call & 0xfc000003) | offset; 355 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 356 __syncicache((void *)&extint_call, sizeof extint_call); 357 __syncicache((void *)EXC_EXI, (int)&extsize); 358 __asm volatile ("mtmsr %0" :: "r"(msr)); 359 } 360 361 /* 362 * Machine dependent startup code. 363 */ 364 365 char msgbuf[MSGBUFSIZE]; 366 367 void 368 cpu_startup(void) 369 { 370 vaddr_t minaddr, maxaddr; 371 prop_number_t pn; 372 prop_data_t pd; 373 char pbuf[9]; 374 375 /* 376 * Initialize error message buffer (at end of core). 377 */ 378 #if 0 /* For some reason this fails... --Artem 379 * Besides, do we really have to put it at the end of core? 380 * Let's use static buffer for now 381 */ 382 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE), 0, 383 UVM_KMF_VAONLY))) 384 panic("startup: no room for message buffer"); 385 for (i = 0; i < btoc(MSGBUFSIZE); i++) 386 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 387 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 0); 388 initmsgbuf((void *)msgbuf_vaddr, round_page(MSGBUFSIZE)); 389 #else 390 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 391 #endif 392 393 printf("%s%s", copyright, version); 394 printf("Walnut PowerPC 405GP Evaluation Board\n"); 395 396 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 397 printf("total memory = %s\n", pbuf); 398 399 minaddr = 0; 400 /* 401 * Allocate a submap for physio 402 */ 403 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 404 VM_PHYS_SIZE, 0, false, NULL); 405 406 /* 407 * No need to allocate an mbuf cluster submap. Mbuf clusters 408 * are allocated via the pool allocator, and we use direct-mapped 409 * pool pages. 410 */ 411 412 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 413 printf("avail memory = %s\n", pbuf); 414 415 /* 416 * Set up the board properties dictionary. 417 */ 418 board_properties = prop_dictionary_create(); 419 KASSERT(board_properties != NULL); 420 421 pn = prop_number_create_integer(board_data.mem_size); 422 KASSERT(pn != NULL); 423 if (prop_dictionary_set(board_properties, "mem-size", pn) == false) 424 panic("setting mem-size"); 425 prop_object_release(pn); 426 427 pd = prop_data_create_data_nocopy(board_data.mac_address_local, 428 sizeof(board_data.mac_address_local)); 429 KASSERT(pd != NULL); 430 if (prop_dictionary_set(board_properties, "emac0-mac-addr", 431 pd) == false) 432 panic("setting emac0-mac-addr"); 433 prop_object_release(pd); 434 435 pd = prop_data_create_data_nocopy(board_data.mac_address_pci, 436 sizeof(board_data.mac_address_pci)); 437 KASSERT(pd != NULL); 438 if (prop_dictionary_set(board_properties, "sip0-mac-addr", 439 pd) == false) 440 panic("setting sip0-mac-addr"); 441 prop_object_release(pd); 442 443 pn = prop_number_create_integer(board_data.processor_speed); 444 KASSERT(pn != NULL); 445 if (prop_dictionary_set(board_properties, "processor-frequency", 446 pn) == false) 447 panic("setting processor-frequency"); 448 prop_object_release(pn); 449 450 /* 451 * Now that we have VM, malloc()s are OK in bus_space. 452 */ 453 bus_space_mallocok(); 454 fake_mapiodev = 0; 455 } 456 457 458 static void 459 dumpsys(void) 460 { 461 462 printf("dumpsys: TBD\n"); 463 } 464 465 /* 466 * Halt or reboot the machine after syncing/dumping according to howto. 467 */ 468 void 469 cpu_reboot(int howto, char *what) 470 { 471 static int syncing; 472 static char str[256]; 473 char *ap = str, *ap1 = ap; 474 475 boothowto = howto; 476 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 477 syncing = 1; 478 vfs_shutdown(); /* sync */ 479 resettodr(); /* set wall clock */ 480 } 481 482 splhigh(); 483 484 if (!cold && (howto & RB_DUMP)) 485 dumpsys(); 486 487 doshutdownhooks(); 488 489 pmf_system_shutdown(boothowto); 490 491 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 492 /* Power off here if we know how...*/ 493 } 494 495 if (howto & RB_HALT) { 496 printf("halted\n\n"); 497 498 goto reboot; /* XXX for now... */ 499 500 #ifdef DDB 501 printf("dropping to debugger\n"); 502 while(1) 503 Debugger(); 504 #endif 505 } 506 507 printf("rebooting\n\n"); 508 if (what && *what) { 509 if (strlen(what) > sizeof str - 5) 510 printf("boot string too large, ignored\n"); 511 else { 512 strcpy(str, what); 513 ap1 = ap = str + strlen(str); 514 *ap++ = ' '; 515 } 516 } 517 *ap++ = '-'; 518 if (howto & RB_SINGLE) 519 *ap++ = 's'; 520 if (howto & RB_KDB) 521 *ap++ = 'd'; 522 *ap++ = 0; 523 if (ap[-2] == '-') 524 *ap1 = 0; 525 526 /* flush cache for msgbuf */ 527 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 528 529 reboot: 530 ppc4xx_reset(); 531 532 printf("ppc4xx_reset() failed!\n"); 533 #ifdef DDB 534 while(1) 535 Debugger(); 536 #else 537 while (1) 538 /* nothing */; 539 #endif 540 } 541 542 int 543 lcsplx(int ipl) 544 { 545 546 return spllower(ipl); /* XXX */ 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 Fri Oct 03 02:09:57 GMT 2025