machdep.c revision 1.16
1 /* $NetBSD: machdep.c,v 1.16 2003/07/25 11:44:21 scw 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 1.16 2003/07/25 11:44:21 scw 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 if (info_block == NULL) 185 /* XXX why isn't r3 set correctly?!?!? */ 186 info_block = (void *)0x8e10; 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 /* 198 * Initialize lwp0 and current pcb and pmap pointers. 199 */ 200 lwp0.l_cpu = ci; 201 lwp0.l_addr = proc0paddr; 202 memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr); 203 204 curpcb = &proc0paddr->u_pcb; 205 curpm = curpcb->pcb_pmreal = curpcb->pcb_pm = pmap_kernel(); 206 207 /* 208 * Set up trap vectors 209 */ 210 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 211 switch (exc) { 212 default: 213 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 214 break; 215 case EXC_EXI: 216 /* 217 * This one is (potentially) installed during autoconf 218 */ 219 break; 220 case EXC_SC: 221 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 222 break; 223 case EXC_ALI: 224 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 225 break; 226 case EXC_DSI: 227 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 228 break; 229 case EXC_ISI: 230 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 231 break; 232 case EXC_MCHK: 233 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 234 break; 235 case EXC_ITMISS: 236 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 237 (size_t)&tlbim4size); 238 break; 239 case EXC_DTMISS: 240 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 241 (size_t)&tlbdm4size); 242 break; 243 /* 244 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 245 * are spaced by 0x10 bytes only.. 246 */ 247 case EXC_PIT: 248 memcpy((void *)EXC_PIT, &pitfitwdog, 249 (size_t)&pitfitwdogsize); 250 break; 251 case EXC_DEBUG: 252 memcpy((void *)EXC_DEBUG, &debugtrap, 253 (size_t)&debugsize); 254 break; 255 case EXC_DTMISS|EXC_ALI: 256 /* PPC405GP Rev D errata item 51 */ 257 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 258 (size_t)&errata51size); 259 break; 260 #if defined(DDB) || defined(IPKDB) 261 case EXC_PGM: 262 #if defined(DDB) 263 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 264 #elif defined(IPKDB) 265 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 266 #endif 267 #endif /* DDB | IPKDB */ 268 break; 269 } 270 271 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 272 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 273 consinit(); 274 275 /* Handle trap instruction as PGM exception */ 276 { 277 int dbcr0; 278 asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 279 asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 280 } 281 282 /* 283 * external interrupt handler install 284 */ 285 install_extint(ext_intr); 286 287 /* 288 * Now enable translation (and machine checks/recoverable interrupts). 289 */ 290 asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 291 : : "r"(0), "K"(PSL_IR|PSL_DR)); 292 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 293 294 uvm_setpagesize(); 295 296 /* 297 * Initialize pmap module. 298 */ 299 pmap_bootstrap(startkernel, endkernel); 300 301 #ifdef DEBUG 302 printf("Board config data:\n"); 303 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 304 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 305 printf(" mem_size = %u\n", board_data.mem_size); 306 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 307 board_data.mac_address_local[0], board_data.mac_address_local[1], 308 board_data.mac_address_local[2], board_data.mac_address_local[3], 309 board_data.mac_address_local[4], board_data.mac_address_local[5]); 310 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 311 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 312 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 313 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 314 printf(" processor_speed = %u\n", board_data.processor_speed); 315 printf(" plb_speed = %u\n", board_data.plb_speed); 316 printf(" pci_speed = %u\n", board_data.pci_speed); 317 #endif 318 319 #if NKSYMS || defined(DDB) || defined(LKM) 320 ksyms_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 321 #endif 322 #ifdef DDB 323 if (boothowto & RB_KDB) 324 Debugger(); 325 #endif 326 #ifdef IPKDB 327 /* 328 * Now trap to IPKDB 329 */ 330 ipkdb_init(); 331 if (boothowto & RB_KDB) 332 ipkdb_connect(0); 333 #endif 334 } 335 336 static void 337 install_extint(void (*handler)(void)) 338 { 339 extern int extint, extsize; 340 extern u_long extint_call; 341 u_long offset = (u_long)handler - (u_long)&extint_call; 342 int msr; 343 344 #ifdef DIAGNOSTIC 345 if (offset > 0x1ffffff) 346 panic("install_extint: too far away"); 347 #endif 348 asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr)); 349 extint_call = (extint_call & 0xfc000003) | offset; 350 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 351 __syncicache((void *)&extint_call, sizeof extint_call); 352 __syncicache((void *)EXC_EXI, (int)&extsize); 353 asm volatile ("mtmsr %0" :: "r"(msr)); 354 } 355 356 /* 357 * Machine dependent startup code. 358 */ 359 360 char msgbuf[MSGBUFSIZE]; 361 362 void 363 cpu_startup(void) 364 { 365 caddr_t v; 366 vaddr_t minaddr, maxaddr; 367 u_int sz, i, base, residual; 368 char pbuf[9]; 369 370 /* 371 * Initialize error message buffer (at end of core). 372 */ 373 #if 0 /* For some reason this fails... --Artem 374 * Besides, do we really have to put it at the end of core? 375 * Let's use static buffer for now 376 */ 377 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE)))) 378 panic("startup: no room for message buffer"); 379 for (i = 0; i < btoc(MSGBUFSIZE); i++) 380 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 381 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 382 initmsgbuf((caddr_t)msgbuf_vaddr, round_page(MSGBUFSIZE)); 383 #else 384 initmsgbuf((caddr_t)msgbuf, round_page(MSGBUFSIZE)); 385 #endif 386 387 388 printf("%s", version); 389 printf("Walnut PowerPC 405GP Evaluation Board\n"); 390 391 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 392 printf("total memory = %s\n", pbuf); 393 394 /* 395 * Find out how much space we need, allocate it, 396 * and then give everything true virtual addresses. 397 */ 398 sz = (u_int)allocsys(NULL, NULL); 399 if ((v = (caddr_t)uvm_km_zalloc(kernel_map, round_page(sz))) == 0) 400 panic("startup: no room for tables"); 401 if (allocsys(v, NULL) - v != sz) 402 panic("startup: table size inconsistency"); 403 404 /* 405 * Now allocate buffers proper. They are different than the above 406 * in that they usually occupy more virtual memory than physical. 407 */ 408 sz = MAXBSIZE * nbuf; 409 minaddr = 0; 410 if (uvm_map(kernel_map, (vaddr_t *)&minaddr, round_page(sz), 411 NULL, UVM_UNKNOWN_OFFSET, 0, 412 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 413 UVM_ADV_NORMAL, 0)) != 0) 414 panic("startup: cannot allocate VM for buffers"); 415 buffers = (char *)minaddr; 416 base = bufpages / nbuf; 417 residual = bufpages % nbuf; 418 if (base >= MAXBSIZE) { 419 /* Don't want to alloc more physical mem than ever needed */ 420 base = MAXBSIZE; 421 residual = 0; 422 } 423 for (i = 0; i < nbuf; i++) { 424 vsize_t curbufsize; 425 vaddr_t curbuf; 426 struct vm_page *pg; 427 428 curbuf = (vaddr_t)buffers + i * MAXBSIZE; 429 curbufsize = PAGE_SIZE * (i < residual ? base + 1 : base); 430 431 while (curbufsize) { 432 pg = uvm_pagealloc(NULL, 0, NULL, 0); 433 if (pg == NULL) 434 panic("cpu_startup: not enough memory for " 435 "buffer cache"); 436 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 437 VM_PROT_READ | VM_PROT_WRITE); 438 curbuf += PAGE_SIZE; 439 curbufsize -= PAGE_SIZE; 440 } 441 } 442 443 /* 444 * Allocate a submap for exec arguments. This map effectively 445 * limits the number of processes exec'ing at any time. 446 */ 447 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 448 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 449 450 /* 451 * Allocate a submap for physio 452 */ 453 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 454 VM_PHYS_SIZE, 0, FALSE, NULL); 455 456 /* 457 * No need to allocate an mbuf cluster submap. Mbuf clusters 458 * are allocated via the pool allocator, and we use direct-mapped 459 * pool pages. 460 */ 461 462 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 463 printf("avail memory = %s\n", pbuf); 464 format_bytes(pbuf, sizeof(pbuf), bufpages * PAGE_SIZE); 465 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 466 467 /* 468 * Set up the buffers. 469 */ 470 bufinit(); 471 472 /* 473 * Set up the board properties database. 474 */ 475 if (!(board_info = propdb_create("board info"))) 476 panic("Cannot create board info database"); 477 478 if (board_info_set("mem-size", &board_data.mem_size, 479 sizeof(&board_data.mem_size), PROP_CONST, 0)) 480 panic("setting mem-size"); 481 if (board_info_set("sip0-mac-addr", &board_data.mac_address_pci, 482 sizeof(&board_data.mac_address_pci), PROP_CONST, 0)) 483 panic("setting sip0-mac-addr"); 484 if (board_info_set("processor-frequency", &board_data.processor_speed, 485 sizeof(&board_data.processor_speed), PROP_CONST, 0)) 486 panic("setting processor-frequency"); 487 488 /* 489 * Now that we have VM, malloc()s are OK in bus_space. 490 */ 491 bus_space_mallocok(); 492 fake_mapiodev = 0; 493 } 494 495 496 static void 497 dumpsys(void) 498 { 499 500 printf("dumpsys: TBD\n"); 501 } 502 503 /* 504 * Soft networking interrupts. 505 */ 506 void 507 softnet(void) 508 { 509 int isr; 510 511 isr = netisr; 512 netisr = 0; 513 514 #define DONETISR(bit, fn) do { \ 515 if (isr & (1 << bit)) \ 516 fn(); \ 517 } while (0) 518 519 #include <net/netisr_dispatch.h> 520 521 #undef DONETISR 522 523 } 524 525 /* 526 * Soft tty interrupts. 527 */ 528 #include "com.h" 529 void 530 softserial(void) 531 { 532 #if NCOM > 0 533 void comsoft(void); /* XXX from dev/ic/com.c */ 534 535 comsoft(); 536 #endif 537 } 538 539 /* 540 * Halt or reboot the machine after syncing/dumping according to howto. 541 */ 542 void 543 cpu_reboot(int howto, char *what) 544 { 545 static int syncing; 546 static char str[256]; 547 char *ap = str, *ap1 = ap; 548 549 boothowto = howto; 550 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 551 syncing = 1; 552 vfs_shutdown(); /* sync */ 553 resettodr(); /* set wall clock */ 554 } 555 556 splhigh(); 557 558 if (!cold && (howto & RB_DUMP)) 559 dumpsys(); 560 561 doshutdownhooks(); 562 563 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 564 /* Power off here if we know how...*/ 565 } 566 567 if (howto & RB_HALT) { 568 printf("halted\n\n"); 569 570 goto reboot; /* XXX for now... */ 571 572 #ifdef DDB 573 printf("dropping to debugger\n"); 574 while(1) 575 Debugger(); 576 #endif 577 } 578 579 printf("rebooting\n\n"); 580 if (what && *what) { 581 if (strlen(what) > sizeof str - 5) 582 printf("boot string too large, ignored\n"); 583 else { 584 strcpy(str, what); 585 ap1 = ap = str + strlen(str); 586 *ap++ = ' '; 587 } 588 } 589 *ap++ = '-'; 590 if (howto & RB_SINGLE) 591 *ap++ = 's'; 592 if (howto & RB_KDB) 593 *ap++ = 'd'; 594 *ap++ = 0; 595 if (ap[-2] == '-') 596 *ap1 = 0; 597 598 /* flush cache for msgbuf */ 599 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 600 601 reboot: 602 ppc4xx_reset(); 603 604 printf("ppc4xx_reset() failed!\n"); 605 #ifdef DDB 606 while(1) 607 Debugger(); 608 #else 609 while (1) 610 /* nothing */; 611 #endif 612 } 613 614 int 615 lcsplx(int ipl) 616 { 617 618 return spllower(ipl); /* XXX */ 619 } 620 621 void 622 mem_regions(struct mem_region **mem, struct mem_region **avail) 623 { 624 625 *mem = physmemr; 626 *avail = availmemr; 627 } 628
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