machdep.c revision 1.12
1 /* $NetBSD: machdep.c,v 1.12 2003/07/14 12:59:36 simonb 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 "opt_compat_netbsd.h" 70 #include "opt_ddb.h" 71 #include "opt_ipkdb.h" 72 73 #include <sys/param.h> 74 #include <sys/buf.h> 75 #include <sys/exec.h> 76 #include <sys/malloc.h> 77 #include <sys/mbuf.h> 78 #include <sys/mount.h> 79 #include <sys/msgbuf.h> 80 #include <sys/proc.h> 81 #include <sys/reboot.h> 82 #include <sys/sa.h> 83 #include <sys/syscallargs.h> 84 #include <sys/syslog.h> 85 #include <sys/systm.h> 86 #include <sys/kernel.h> 87 #include <sys/user.h> 88 #include <sys/boot_flag.h> 89 #include <sys/properties.h> 90 #include <sys/ksyms.h> 91 92 #include <uvm/uvm_extern.h> 93 94 #include <net/netisr.h> 95 96 #include <machine/bus.h> 97 #include <machine/powerpc.h> 98 #include <machine/trap.h> 99 #include <machine/walnut.h> 100 101 #include <powerpc/spr.h> 102 #include <powerpc/ibm4xx/dcr405gp.h> 103 #include <machine/bus.h> 104 105 #include <dev/cons.h> 106 107 #include "ksyms.h" 108 109 #if defined(DDB) 110 #include <machine/db_machdep.h> 111 #include <ddb/db_extern.h> 112 #endif 113 114 /* 115 * Global variables used here and there 116 */ 117 struct vm_map *exec_map = NULL; 118 struct vm_map *mb_map = NULL; 119 struct vm_map *phys_map = NULL; 120 121 /* 122 * This should probably be in autoconf! XXX 123 */ 124 char cpu_model[80]; 125 char machine[] = MACHINE; /* from <machine/param.h> */ 126 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 127 128 extern struct user *proc0paddr; 129 130 char bootpath[256]; 131 paddr_t msgbuf_paddr; 132 vaddr_t msgbuf_vaddr; 133 134 #if NKSYMS || defined(DDB) || defined(LKM) 135 void *startsym, *endsym; 136 #endif 137 138 int lcsplx(int); 139 void initppc(u_int, u_int, char *, void *); 140 141 static void dumpsys(void); 142 static void install_extint(void (*)(void)); 143 144 #define MEMREGIONS 8 145 struct mem_region physmemr[MEMREGIONS]; /* Hard code memory */ 146 struct mem_region availmemr[MEMREGIONS]; /* Who's supposed to set these up? */ 147 148 struct board_cfg_data board_data; 149 struct propdb *board_info = NULL; 150 151 void 152 initppc(u_int startkernel, u_int endkernel, char *args, void *info_block) 153 { 154 extern int defaulttrap, defaultsize; 155 extern int sctrap, scsize; 156 extern int alitrap, alisize; 157 extern int dsitrap, dsisize; 158 extern int isitrap, isisize; 159 extern int mchktrap, mchksize; 160 extern int tlbimiss4xx, tlbim4size; 161 extern int tlbdmiss4xx, tlbdm4size; 162 extern int pitfitwdog, pitfitwdogsize; 163 extern int debugtrap, debugsize; 164 extern int errata51handler, errata51size; 165 #ifdef DDB 166 extern int ddblow, ddbsize; 167 #endif 168 #ifdef IPKDB 169 extern int ipkdblow, ipkdbsize; 170 #endif 171 int exc; 172 struct cpu_info * const ci = curcpu(); 173 174 /* Disable all external interrupts */ 175 mtdcr(DCR_UIC0_ER, 0); 176 177 /* Initialize cache info for memcpy, etc. */ 178 cpu_probe_cache(); 179 180 /* Save info block */ 181 if (info_block == NULL) 182 /* XXX why isn't r3 set correctly?!?!? */ 183 info_block = (void *)0x8e10; 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 curpm = curpcb->pcb_pmreal = 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 consinit(); 299 300 #ifdef DEBUG 301 printf("Board config data:\n"); 302 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 303 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 304 printf(" mem_size = %u\n", board_data.mem_size); 305 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 306 board_data.mac_address_local[0], board_data.mac_address_local[1], 307 board_data.mac_address_local[2], board_data.mac_address_local[3], 308 board_data.mac_address_local[4], board_data.mac_address_local[5]); 309 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 310 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 311 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 312 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 313 printf(" processor_speed = %u\n", board_data.processor_speed); 314 printf(" plb_speed = %u\n", board_data.plb_speed); 315 printf(" pci_speed = %u\n", board_data.pci_speed); 316 #endif 317 318 #if NKSYMS || defined(DDB) || defined(LKM) 319 ksyms_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 320 #endif 321 #ifdef DDB 322 if (boothowto & RB_KDB) 323 Debugger(); 324 #endif 325 #ifdef IPKDB 326 /* 327 * Now trap to IPKDB 328 */ 329 ipkdb_init(); 330 if (boothowto & RB_KDB) 331 ipkdb_connect(0); 332 #endif 333 fake_mapiodev = 0; 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 omsr, msr; 343 344 #ifdef DIAGNOSTIC 345 if (offset > 0x1ffffff) 346 panic("install_extint: too far away"); 347 #endif 348 asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1" 349 : "=r"(omsr), "=r"(msr) : "K"((u_short)~PSL_EE)); 350 extint_call = (extint_call & 0xfc000003) | offset; 351 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 352 __syncicache((void *)&extint_call, sizeof extint_call); 353 __syncicache((void *)EXC_EXI, (int)&extsize); 354 asm volatile ("mtmsr %0" :: "r"(omsr)); 355 } 356 357 /* 358 * Machine dependent startup code. 359 */ 360 361 char msgbuf[MSGBUFSIZE]; 362 363 void 364 cpu_startup(void) 365 { 366 caddr_t v; 367 vaddr_t minaddr, maxaddr; 368 u_int sz, i, base, residual; 369 char pbuf[9]; 370 371 /* 372 * Initialize error message buffer (at end of core). 373 */ 374 #if 0 /* For some reason this fails... --Artem 375 * Besides, do we really have to put it at the end of core? 376 * Let's use static buffer for now 377 */ 378 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE)))) 379 panic("startup: no room for message buffer"); 380 for (i = 0; i < btoc(MSGBUFSIZE); i++) 381 pmap_kenter_pa(msgbuf_vaddr + i * PAGE_SIZE, 382 msgbuf_paddr + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 383 initmsgbuf((caddr_t)msgbuf_vaddr, round_page(MSGBUFSIZE)); 384 #else 385 initmsgbuf((caddr_t)msgbuf, round_page(MSGBUFSIZE)); 386 #endif 387 388 389 printf("%s", version); 390 printf("Walnut PowerPC 405GP Evaluation Board\n"); 391 392 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 393 printf("total memory = %s\n", pbuf); 394 395 /* 396 * Find out how much space we need, allocate it, 397 * and then give everything true virtual addresses. 398 */ 399 sz = (u_int)allocsys(NULL, NULL); 400 if ((v = (caddr_t)uvm_km_zalloc(kernel_map, round_page(sz))) == 0) 401 panic("startup: no room for tables"); 402 if (allocsys(v, NULL) - v != sz) 403 panic("startup: table size inconsistency"); 404 405 /* 406 * Now allocate buffers proper. They are different than the above 407 * in that they usually occupy more virtual memory than physical. 408 */ 409 sz = MAXBSIZE * nbuf; 410 minaddr = 0; 411 if (uvm_map(kernel_map, (vaddr_t *)&minaddr, round_page(sz), 412 NULL, UVM_UNKNOWN_OFFSET, 0, 413 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 414 UVM_ADV_NORMAL, 0)) != 0) 415 panic("startup: cannot allocate VM for buffers"); 416 buffers = (char *)minaddr; 417 base = bufpages / nbuf; 418 residual = bufpages % nbuf; 419 if (base >= MAXBSIZE) { 420 /* Don't want to alloc more physical mem than ever needed */ 421 base = MAXBSIZE; 422 residual = 0; 423 } 424 for (i = 0; i < nbuf; i++) { 425 vsize_t curbufsize; 426 vaddr_t curbuf; 427 struct vm_page *pg; 428 429 curbuf = (vaddr_t)buffers + i * MAXBSIZE; 430 curbufsize = PAGE_SIZE * (i < residual ? base + 1 : base); 431 432 while (curbufsize) { 433 pg = uvm_pagealloc(NULL, 0, NULL, 0); 434 if (pg == NULL) 435 panic("cpu_startup: not enough memory for " 436 "buffer cache"); 437 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 438 VM_PROT_READ | VM_PROT_WRITE); 439 curbuf += PAGE_SIZE; 440 curbufsize -= PAGE_SIZE; 441 } 442 } 443 444 /* 445 * Allocate a submap for exec arguments. This map effectively 446 * limits the number of processes exec'ing at any time. 447 */ 448 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 449 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 450 451 /* 452 * Allocate a submap for physio 453 */ 454 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 455 VM_PHYS_SIZE, 0, FALSE, NULL); 456 457 /* 458 * No need to allocate an mbuf cluster submap. Mbuf clusters 459 * are allocated via the pool allocator, and we use direct-mapped 460 * pool pages. 461 */ 462 463 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 464 printf("avail memory = %s\n", pbuf); 465 format_bytes(pbuf, sizeof(pbuf), bufpages * PAGE_SIZE); 466 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 467 468 /* 469 * Set up the buffers. 470 */ 471 bufinit(); 472 473 /* 474 * Set up the board properties database. 475 */ 476 if (!(board_info = propdb_create("board info"))) 477 panic("Cannot create board info database"); 478 479 if (board_info_set("mem-size", &board_data.mem_size, 480 sizeof(&board_data.mem_size), PROP_CONST, 0)) 481 panic("setting mem-size"); 482 if (board_info_set("sip0-mac-addr", &board_data.mac_address_pci, 483 sizeof(&board_data.mac_address_pci), PROP_CONST, 0)) 484 panic("setting sip0-mac-addr"); 485 if (board_info_set("processor-frequency", &board_data.processor_speed, 486 sizeof(&board_data.processor_speed), PROP_CONST, 0)) 487 panic("setting processor-frequency"); 488 } 489 490 491 static void 492 dumpsys(void) 493 { 494 495 printf("dumpsys: TBD\n"); 496 } 497 498 /* 499 * Soft networking interrupts. 500 */ 501 void 502 softnet(void) 503 { 504 int isr; 505 506 isr = netisr; 507 netisr = 0; 508 509 #define DONETISR(bit, fn) do { \ 510 if (isr & (1 << bit)) \ 511 fn(); \ 512 } while (0) 513 514 #include <net/netisr_dispatch.h> 515 516 #undef DONETISR 517 518 } 519 520 /* 521 * Soft tty interrupts. 522 */ 523 #include "com.h" 524 void 525 softserial(void) 526 { 527 #if NCOM > 0 528 void comsoft(void); /* XXX from dev/ic/com.c */ 529 530 comsoft(); 531 #endif 532 } 533 534 /* 535 * Halt or reboot the machine after syncing/dumping according to howto. 536 */ 537 void 538 cpu_reboot(int howto, char *what) 539 { 540 static int syncing; 541 static char str[256]; 542 char *ap = str, *ap1 = ap; 543 544 boothowto = howto; 545 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 546 syncing = 1; 547 vfs_shutdown(); /* sync */ 548 resettodr(); /* set wall clock */ 549 } 550 551 splhigh(); 552 553 if (!cold && (howto & RB_DUMP)) 554 dumpsys(); 555 556 doshutdownhooks(); 557 558 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 559 /* Power off here if we know how...*/ 560 } 561 562 if (howto & RB_HALT) { 563 printf("halted\n\n"); 564 565 goto reboot; /* XXX for now... */ 566 567 #ifdef DDB 568 printf("dropping to debugger\n"); 569 while(1) 570 Debugger(); 571 #endif 572 } 573 574 printf("rebooting\n\n"); 575 if (what && *what) { 576 if (strlen(what) > sizeof str - 5) 577 printf("boot string too large, ignored\n"); 578 else { 579 strcpy(str, what); 580 ap1 = ap = str + strlen(str); 581 *ap++ = ' '; 582 } 583 } 584 *ap++ = '-'; 585 if (howto & RB_SINGLE) 586 *ap++ = 's'; 587 if (howto & RB_KDB) 588 *ap++ = 'd'; 589 *ap++ = 0; 590 if (ap[-2] == '-') 591 *ap1 = 0; 592 593 /* flush cache for msgbuf */ 594 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 595 596 reboot: 597 ppc4xx_reset(); 598 599 printf("ppc4xx_reset() failed!\n"); 600 #ifdef DDB 601 while(1) 602 Debugger(); 603 #else 604 while (1) 605 /* nothing */; 606 #endif 607 } 608 609 int 610 lcsplx(int ipl) 611 { 612 613 return spllower(ipl); /* XXX */ 614 } 615 616 void 617 mem_regions(struct mem_region **mem, struct mem_region **avail) 618 { 619 620 *mem = physmemr; 621 *avail = availmemr; 622 } 623
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