machdep.c revision 1.18
1 /* $NetBSD: machdep.c,v 1.18 2003/08/18 21:34:11 eeh 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 1.18 2003/08/18 21:34:11 eeh Exp $"); 71 72 #include "opt_compat_netbsd.h" 73 #include "opt_ddb.h" 74 #include "opt_ipkdb.h" 75 76 #include <sys/param.h> 77 #include <sys/buf.h> 78 #include <sys/exec.h> 79 #include <sys/malloc.h> 80 #include <sys/mbuf.h> 81 #include <sys/mount.h> 82 #include <sys/msgbuf.h> 83 #include <sys/proc.h> 84 #include <sys/reboot.h> 85 #include <sys/sa.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/properties.h> 93 #include <sys/ksyms.h> 94 95 #include <uvm/uvm_extern.h> 96 97 #include <net/netisr.h> 98 99 #include <machine/bus.h> 100 #include <machine/powerpc.h> 101 #include <machine/trap.h> 102 #include <machine/walnut.h> 103 104 #include <powerpc/spr.h> 105 #include <powerpc/ibm4xx/dcr405gp.h> 106 #include <machine/bus.h> 107 108 #include <dev/cons.h> 109 110 #include "ksyms.h" 111 112 #if defined(DDB) 113 #include <machine/db_machdep.h> 114 #include <ddb/db_extern.h> 115 #endif 116 117 /* 118 * Global variables used here and there 119 */ 120 struct vm_map *exec_map = NULL; 121 struct vm_map *mb_map = NULL; 122 struct vm_map *phys_map = NULL; 123 124 /* 125 * This should probably be in autoconf! XXX 126 */ 127 char cpu_model[80]; 128 char machine[] = MACHINE; /* from <machine/param.h> */ 129 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 130 131 extern struct user *proc0paddr; 132 133 char bootpath[256]; 134 paddr_t msgbuf_paddr; 135 vaddr_t msgbuf_vaddr; 136 137 #if NKSYMS || defined(DDB) || defined(LKM) 138 void *startsym, *endsym; 139 #endif 140 141 int lcsplx(int); 142 void initppc(u_int, u_int, char *, void *); 143 144 static void dumpsys(void); 145 static void install_extint(void (*)(void)); 146 147 #define MEMREGIONS 8 148 struct mem_region physmemr[MEMREGIONS]; /* Hard code memory */ 149 struct mem_region availmemr[MEMREGIONS]; /* Who's supposed to set these up? */ 150 151 struct board_cfg_data board_data; 152 struct propdb *board_info = NULL; 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 int exc; 175 struct cpu_info * const ci = curcpu(); 176 177 /* Disable all external interrupts */ 178 mtdcr(DCR_UIC0_ER, 0); 179 180 /* Initialize cache info for memcpy, etc. */ 181 cpu_probe_cache(); 182 183 /* Save info block */ 184 memcpy(&board_data, info_block, sizeof(board_data)); 185 186 memset(physmemr, 0, sizeof physmemr); 187 memset(availmemr, 0, sizeof availmemr); 188 physmemr[0].start = 0; 189 physmemr[0].size = board_data.mem_size & ~PGOFSET; 190 /* Lower memory reserved by eval board BIOS */ 191 availmemr[0].start = startkernel; 192 availmemr[0].size = board_data.mem_size - availmemr[0].start; 193 194 /* 195 * Initialize lwp0 and current pcb and pmap pointers. 196 */ 197 lwp0.l_cpu = ci; 198 lwp0.l_addr = proc0paddr; 199 memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr); 200 201 curpcb = &proc0paddr->u_pcb; 202 curpcb->pcb_pm = pmap_kernel(); 203 204 /* 205 * Set up trap vectors 206 */ 207 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 208 switch (exc) { 209 default: 210 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 211 break; 212 case EXC_EXI: 213 /* 214 * This one is (potentially) installed during autoconf 215 */ 216 break; 217 case EXC_SC: 218 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 219 break; 220 case EXC_ALI: 221 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 222 break; 223 case EXC_DSI: 224 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 225 break; 226 case EXC_ISI: 227 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 228 break; 229 case EXC_MCHK: 230 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 231 break; 232 case EXC_ITMISS: 233 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 234 (size_t)&tlbim4size); 235 break; 236 case EXC_DTMISS: 237 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 238 (size_t)&tlbdm4size); 239 break; 240 /* 241 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 242 * are spaced by 0x10 bytes only.. 243 */ 244 case EXC_PIT: 245 memcpy((void *)EXC_PIT, &pitfitwdog, 246 (size_t)&pitfitwdogsize); 247 break; 248 case EXC_DEBUG: 249 memcpy((void *)EXC_DEBUG, &debugtrap, 250 (size_t)&debugsize); 251 break; 252 case EXC_DTMISS|EXC_ALI: 253 /* PPC405GP Rev D errata item 51 */ 254 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 255 (size_t)&errata51size); 256 break; 257 #if defined(DDB) || defined(IPKDB) 258 case EXC_PGM: 259 #if defined(DDB) 260 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 261 #elif defined(IPKDB) 262 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 263 #endif 264 #endif /* DDB | IPKDB */ 265 break; 266 } 267 268 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 269 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 270 consinit(); 271 272 /* Handle trap instruction as PGM exception */ 273 { 274 int dbcr0; 275 asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 276 asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 277 } 278 279 /* 280 * external interrupt handler install 281 */ 282 install_extint(ext_intr); 283 284 /* 285 * Now enable translation (and machine checks/recoverable interrupts). 286 */ 287 asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 288 : : "r"(0), "K"(PSL_IR|PSL_DR)); 289 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 290 291 uvm_setpagesize(); 292 293 /* 294 * Initialize pmap module. 295 */ 296 pmap_bootstrap(startkernel, endkernel); 297 298 #ifdef DEBUG 299 printf("Board config data:\n"); 300 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 301 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 302 printf(" mem_size = %u\n", board_data.mem_size); 303 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 304 board_data.mac_address_local[0], board_data.mac_address_local[1], 305 board_data.mac_address_local[2], board_data.mac_address_local[3], 306 board_data.mac_address_local[4], board_data.mac_address_local[5]); 307 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 308 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 309 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 310 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 311 printf(" processor_speed = %u\n", board_data.processor_speed); 312 printf(" plb_speed = %u\n", board_data.plb_speed); 313 printf(" pci_speed = %u\n", board_data.pci_speed); 314 #endif 315 316 #if NKSYMS || defined(DDB) || defined(LKM) 317 ksyms_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 318 #endif 319 #ifdef DDB 320 if (boothowto & RB_KDB) 321 Debugger(); 322 #endif 323 #ifdef IPKDB 324 /* 325 * Now trap to IPKDB 326 */ 327 ipkdb_init(); 328 if (boothowto & RB_KDB) 329 ipkdb_connect(0); 330 #endif 331 } 332 333 static void 334 install_extint(void (*handler)(void)) 335 { 336 extern int extint, extsize; 337 extern u_long extint_call; 338 u_long offset = (u_long)handler - (u_long)&extint_call; 339 int msr; 340 341 #ifdef DIAGNOSTIC 342 if (offset > 0x1ffffff) 343 panic("install_extint: too far away"); 344 #endif 345 asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 346 extint_call = (extint_call & 0xfc000003) | offset; 347 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 348 __syncicache((void *)&extint_call, sizeof extint_call); 349 __syncicache((void *)EXC_EXI, (int)&extsize); 350 asm volatile ("mtmsr %0" :: "r"(msr)); 351 } 352 353 /* 354 * Machine dependent startup code. 355 */ 356 357 char msgbuf[MSGBUFSIZE]; 358 359 void 360 cpu_startup(void) 361 { 362 caddr_t v; 363 vaddr_t minaddr, maxaddr; 364 u_int sz, i, base, residual; 365 char pbuf[9]; 366 367 /* 368 * Initialize error message buffer (at end of core). 369 */ 370 #if 0 /* For some reason this fails... --Artem 371 * Besides, do we really have to put it at the end of core? 372 * Let's use static buffer for now 373 */ 374 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE)))) 375 panic("startup: no room for message buffer"); 376 for (i = 0; i < btoc(MSGBUFSIZE); i++) 377 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 378 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 379 initmsgbuf((caddr_t)msgbuf_vaddr, round_page(MSGBUFSIZE)); 380 #else 381 initmsgbuf((caddr_t)msgbuf, round_page(MSGBUFSIZE)); 382 #endif 383 384 385 printf("%s", version); 386 printf("Walnut PowerPC 405GP Evaluation Board\n"); 387 388 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 389 printf("total memory = %s\n", pbuf); 390 391 /* 392 * Find out how much space we need, allocate it, 393 * and then give everything true virtual addresses. 394 */ 395 sz = (u_int)allocsys(NULL, NULL); 396 if ((v = (caddr_t)uvm_km_zalloc(kernel_map, round_page(sz))) == 0) 397 panic("startup: no room for tables"); 398 if (allocsys(v, NULL) - v != sz) 399 panic("startup: table size inconsistency"); 400 401 /* 402 * Now allocate buffers proper. They are different than the above 403 * in that they usually occupy more virtual memory than physical. 404 */ 405 sz = MAXBSIZE * nbuf; 406 minaddr = 0; 407 if (uvm_map(kernel_map, (vaddr_t *)&minaddr, round_page(sz), 408 NULL, UVM_UNKNOWN_OFFSET, 0, 409 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 410 UVM_ADV_NORMAL, 0)) != 0) 411 panic("startup: cannot allocate VM for buffers"); 412 buffers = (char *)minaddr; 413 base = bufpages / nbuf; 414 residual = bufpages % nbuf; 415 if (base >= MAXBSIZE) { 416 /* Don't want to alloc more physical mem than ever needed */ 417 base = MAXBSIZE; 418 residual = 0; 419 } 420 for (i = 0; i < nbuf; i++) { 421 vsize_t curbufsize; 422 vaddr_t curbuf; 423 struct vm_page *pg; 424 425 curbuf = (vaddr_t)buffers + i * MAXBSIZE; 426 curbufsize = PAGE_SIZE * (i < residual ? base + 1 : base); 427 428 while (curbufsize) { 429 pg = uvm_pagealloc(NULL, 0, NULL, 0); 430 if (pg == NULL) 431 panic("cpu_startup: not enough memory for " 432 "buffer cache"); 433 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 434 VM_PROT_READ | VM_PROT_WRITE); 435 curbuf += PAGE_SIZE; 436 curbufsize -= PAGE_SIZE; 437 } 438 } 439 440 /* 441 * Allocate a submap for exec arguments. This map effectively 442 * limits the number of processes exec'ing at any time. 443 */ 444 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 445 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 446 447 /* 448 * Allocate a submap for physio 449 */ 450 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 451 VM_PHYS_SIZE, 0, FALSE, NULL); 452 453 /* 454 * No need to allocate an mbuf cluster submap. Mbuf clusters 455 * are allocated via the pool allocator, and we use direct-mapped 456 * pool pages. 457 */ 458 459 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 460 printf("avail memory = %s\n", pbuf); 461 format_bytes(pbuf, sizeof(pbuf), bufpages * PAGE_SIZE); 462 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 463 464 /* 465 * Set up the buffers. 466 */ 467 bufinit(); 468 469 /* 470 * Set up the board properties database. 471 */ 472 if (!(board_info = propdb_create("board info"))) 473 panic("Cannot create board info database"); 474 475 if (board_info_set("mem-size", &board_data.mem_size, 476 sizeof(&board_data.mem_size), PROP_CONST, 0)) 477 panic("setting mem-size"); 478 if (board_info_set("sip0-mac-addr", &board_data.mac_address_pci, 479 sizeof(&board_data.mac_address_pci), PROP_CONST, 0)) 480 panic("setting sip0-mac-addr"); 481 if (board_info_set("processor-frequency", &board_data.processor_speed, 482 sizeof(&board_data.processor_speed), PROP_CONST, 0)) 483 panic("setting processor-frequency"); 484 485 /* 486 * Now that we have VM, malloc()s are OK in bus_space. 487 */ 488 bus_space_mallocok(); 489 fake_mapiodev = 0; 490 } 491 492 493 static void 494 dumpsys(void) 495 { 496 497 printf("dumpsys: TBD\n"); 498 } 499 500 /* 501 * Soft networking interrupts. 502 */ 503 void 504 softnet(void) 505 { 506 int isr; 507 508 isr = netisr; 509 netisr = 0; 510 511 #define DONETISR(bit, fn) do { \ 512 if (isr & (1 << bit)) \ 513 fn(); \ 514 } while (0) 515 516 #include <net/netisr_dispatch.h> 517 518 #undef DONETISR 519 520 } 521 522 /* 523 * Soft tty interrupts. 524 */ 525 #include "com.h" 526 void 527 softserial(void) 528 { 529 #if NCOM > 0 530 void comsoft(void); /* XXX from dev/ic/com.c */ 531 532 comsoft(); 533 #endif 534 } 535 536 /* 537 * Halt or reboot the machine after syncing/dumping according to howto. 538 */ 539 void 540 cpu_reboot(int howto, char *what) 541 { 542 static int syncing; 543 static char str[256]; 544 char *ap = str, *ap1 = ap; 545 546 boothowto = howto; 547 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 548 syncing = 1; 549 vfs_shutdown(); /* sync */ 550 resettodr(); /* set wall clock */ 551 } 552 553 splhigh(); 554 555 if (!cold && (howto & RB_DUMP)) 556 dumpsys(); 557 558 doshutdownhooks(); 559 560 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 561 /* Power off here if we know how...*/ 562 } 563 564 if (howto & RB_HALT) { 565 printf("halted\n\n"); 566 567 goto reboot; /* XXX for now... */ 568 569 #ifdef DDB 570 printf("dropping to debugger\n"); 571 while(1) 572 Debugger(); 573 #endif 574 } 575 576 printf("rebooting\n\n"); 577 if (what && *what) { 578 if (strlen(what) > sizeof str - 5) 579 printf("boot string too large, ignored\n"); 580 else { 581 strcpy(str, what); 582 ap1 = ap = str + strlen(str); 583 *ap++ = ' '; 584 } 585 } 586 *ap++ = '-'; 587 if (howto & RB_SINGLE) 588 *ap++ = 's'; 589 if (howto & RB_KDB) 590 *ap++ = 'd'; 591 *ap++ = 0; 592 if (ap[-2] == '-') 593 *ap1 = 0; 594 595 /* flush cache for msgbuf */ 596 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 597 598 reboot: 599 ppc4xx_reset(); 600 601 printf("ppc4xx_reset() failed!\n"); 602 #ifdef DDB 603 while(1) 604 Debugger(); 605 #else 606 while (1) 607 /* nothing */; 608 #endif 609 } 610 611 int 612 lcsplx(int ipl) 613 { 614 615 return spllower(ipl); /* XXX */ 616 } 617 618 void 619 mem_regions(struct mem_region **mem, struct mem_region **avail) 620 { 621 622 *mem = physmemr; 623 *avail = availmemr; 624 } 625
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