machdep.c revision 1.2
1 /* $NetBSD: machdep.c,v 1.2 2003/01/04 18:14:48 thorpej 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/syscallargs.h> 83 #include <sys/syslog.h> 84 #include <sys/systm.h> 85 #include <sys/kernel.h> 86 #include <sys/user.h> 87 #include <sys/boot_flag.h> 88 #include <sys/properties.h> 89 90 #include <uvm/uvm_extern.h> 91 92 #include <net/netisr.h> 93 94 #include <machine/bus.h> 95 #include <machine/powerpc.h> 96 #include <machine/trap.h> 97 #include <machine/walnut.h> 98 #include <machine/dcr.h> 99 100 #include <powerpc/spr.h> 101 #include <machine/bus.h> 102 103 #include <dev/cons.h> 104 105 #ifdef DDB 106 #include <machine/db_machdep.h> 107 #include <ddb/db_extern.h> 108 #endif 109 110 #include "com.h" 111 #if NCOM > 0 112 #include <dev/ic/comreg.h> /* For COM_FREQ */ 113 #endif 114 115 /* 116 * Global variables used here and there 117 */ 118 struct vm_map *exec_map = NULL; 119 struct vm_map *mb_map = NULL; 120 struct vm_map *phys_map = NULL; 121 122 /* 123 * This should probably be in autoconf! XXX 124 */ 125 char cpu_model[80]; 126 char machine[] = MACHINE; /* from <machine/param.h> */ 127 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 128 129 struct pcb *curpcb; 130 struct pmap *curpm; 131 struct proc *fpuproc; /* XXX - shouldn't need this on fpu-less CPUs */ 132 133 extern struct user *proc0paddr; 134 135 char bootpath[256]; 136 paddr_t msgbuf_paddr; 137 vaddr_t msgbuf_vaddr; 138 139 #ifdef DDB 140 void *startsym, *endsym; 141 #endif 142 143 int lcsplx(int); 144 void initppc(u_int, u_int, char *, void *); 145 146 static void dumpsys(void); 147 static void install_extint(void (*)(void)); 148 149 #define MEMREGIONS 8 150 struct mem_region physmemr[MEMREGIONS]; /* Hard code memory */ 151 struct mem_region availmemr[MEMREGIONS]; /* Who's supposed to set these up? */ 152 153 struct board_cfg_data board_data; 154 struct propdb *board_info = NULL; 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 int exc; 177 extern char _edata, _end; 178 179 /* Disable all external interrupts */ 180 mtdcr(DCR_UIC0_ER, 0); 181 182 /* Initialize cache info for memcpy, etc. */ 183 cpu_probe_cache(); 184 185 memset(&_edata, 0, &_end-&_edata); /* Clear BSS area */ 186 187 /* Save info block */ 188 if (info_block == NULL) 189 /* XXX why isn't r3 set correctly?!?!? */ 190 info_block = (void *)0x8e10; 191 memcpy(&board_data, info_block, sizeof(board_data)); 192 193 memset(physmemr, 0, sizeof physmemr); 194 memset(availmemr, 0, sizeof availmemr); 195 physmemr[0].start = 0; 196 physmemr[0].size = board_data.mem_size & ~PGOFSET; 197 /* Lower memory reserved by eval board BIOS */ 198 availmemr[0].start = startkernel; 199 availmemr[0].size = board_data.mem_size - availmemr[0].start; 200 201 proc0.p_addr = proc0paddr; 202 memset(proc0.p_addr, 0, sizeof *proc0.p_addr); 203 204 curpcb = &proc0paddr->u_pcb; 205 206 curpm = curpcb->pcb_pmreal = curpcb->pcb_pm = pmap_kernel(); 207 208 /* 209 * Set up trap vectors 210 */ 211 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 212 switch (exc) { 213 default: 214 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 215 break; 216 case EXC_EXI: 217 /* 218 * This one is (potentially) installed during autoconf 219 */ 220 break; 221 case EXC_SC: 222 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 223 break; 224 case EXC_ALI: 225 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 226 break; 227 case EXC_DSI: 228 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 229 break; 230 case EXC_ISI: 231 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 232 break; 233 case EXC_MCHK: 234 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 235 break; 236 case EXC_ITMISS: 237 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 238 (size_t)&tlbim4size); 239 break; 240 case EXC_DTMISS: 241 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 242 (size_t)&tlbdm4size); 243 break; 244 /* 245 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 246 * are spaced by 0x10 bytes only.. 247 */ 248 case EXC_PIT: 249 memcpy((void *)EXC_PIT, &pitfitwdog, 250 (size_t)&pitfitwdogsize); 251 break; 252 case EXC_DEBUG: 253 memcpy((void *)EXC_DEBUG, &debugtrap, 254 (size_t)&debugsize); 255 break; 256 case EXC_DTMISS|EXC_ALI: 257 /* PPC405GP Rev D errata item 51 */ 258 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 259 (size_t)&errata51size); 260 break; 261 #if defined(DDB) || defined(IPKDB) 262 case EXC_PGM: 263 #if defined(DDB) 264 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 265 #elif defined(IPKDB) 266 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 267 #endif 268 #endif /* DDB | IPKDB */ 269 break; 270 } 271 272 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 273 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 274 consinit(); 275 276 /* Handle trap instruction as PGM exception */ 277 { 278 int dbcr0; 279 asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 280 asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 281 } 282 283 /* 284 * external interrupt handler install 285 */ 286 install_extint(ext_intr); 287 288 /* 289 * Now enable translation (and machine checks/recoverable interrupts). 290 */ 291 asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 292 : : "r"(0), "K"(PSL_IR|PSL_DR)); 293 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 294 295 uvm_setpagesize(); 296 297 /* 298 * Initialize pmap module. 299 */ 300 pmap_bootstrap(startkernel, endkernel); 301 302 consinit(); 303 304 #ifdef DEBUG 305 printf("Board config data:\n"); 306 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 307 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 308 printf(" mem_size = %u\n", board_data.mem_size); 309 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 310 board_data.mac_address_local[0], board_data.mac_address_local[1], 311 board_data.mac_address_local[2], board_data.mac_address_local[3], 312 board_data.mac_address_local[4], board_data.mac_address_local[5]); 313 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 314 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 315 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 316 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 317 printf(" processor_speed = %u\n", board_data.processor_speed); 318 printf(" plb_speed = %u\n", board_data.plb_speed); 319 printf(" pci_speed = %u\n", board_data.pci_speed); 320 #endif 321 322 #ifdef DDB 323 ddb_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 324 if (boothowto & RB_KDB) 325 Debugger(); 326 #endif 327 #ifdef IPKDB 328 /* 329 * Now trap to IPKDB 330 */ 331 ipkdb_init(); 332 if (boothowto & RB_KDB) 333 ipkdb_connect(0); 334 #endif 335 fake_mapiodev = 0; 336 } 337 338 static void 339 install_extint(void (*handler)(void)) 340 { 341 extern int extint, extsize; 342 extern u_long extint_call; 343 u_long offset = (u_long)handler - (u_long)&extint_call; 344 int omsr, msr; 345 346 #ifdef DIAGNOSTIC 347 if (offset > 0x1ffffff) 348 panic("install_extint: too far away"); 349 #endif 350 asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1" 351 : "=r"(omsr), "=r"(msr) : "K"((u_short)~PSL_EE)); 352 extint_call = (extint_call & 0xfc000003) | offset; 353 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 354 __syncicache((void *)&extint_call, sizeof extint_call); 355 __syncicache((void *)EXC_EXI, (int)&extsize); 356 asm volatile ("mtmsr %0" :: "r"(omsr)); 357 } 358 359 /* 360 * Machine dependent startup code. 361 */ 362 363 char msgbuf[MSGBUFSIZE]; 364 365 void 366 cpu_startup(void) 367 { 368 caddr_t v; 369 vaddr_t minaddr, maxaddr; 370 u_int sz, i, base, residual; 371 char pbuf[9]; 372 373 proc0.p_addr = proc0paddr; 374 v = (caddr_t)proc0paddr + USPACE; 375 376 /* 377 * Initialize error message buffer (at end of core). 378 */ 379 #if 0 /* For some reason this fails... --Artem 380 * Besides, do we really have to put it at the end of core? 381 * Let's use static buffer for now 382 */ 383 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE)))) 384 panic("startup: no room for message buffer"); 385 for (i = 0; i < btoc(MSGBUFSIZE); i++) 386 pmap_kenter_pa(msgbuf_vaddr + i * NBPG, 387 msgbuf_paddr + i * NBPG, VM_PROT_READ|VM_PROT_WRITE); 388 initmsgbuf((caddr_t)msgbuf_vaddr, round_page(MSGBUFSIZE)); 389 #else 390 initmsgbuf((caddr_t)msgbuf, round_page(MSGBUFSIZE)); 391 #endif 392 393 394 printf("%s", version); 395 printf("Walnut PowerPC 405GP Evaluation Board\n"); 396 397 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 398 printf("total memory = %s\n", pbuf); 399 400 /* 401 * Find out how much space we need, allocate it, 402 * and then give everything true virtual addresses. 403 */ 404 sz = (u_int)allocsys(NULL, NULL); 405 if ((v = (caddr_t)uvm_km_zalloc(kernel_map, round_page(sz))) == 0) 406 panic("startup: no room for tables"); 407 if (allocsys(v, NULL) - v != sz) 408 panic("startup: table size inconsistency"); 409 410 /* 411 * Now allocate buffers proper. They are different than the above 412 * in that they usually occupy more virtual memory than physical. 413 */ 414 sz = MAXBSIZE * nbuf; 415 minaddr = 0; 416 if (uvm_map(kernel_map, (vaddr_t *)&minaddr, round_page(sz), 417 NULL, UVM_UNKNOWN_OFFSET, 0, 418 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 419 UVM_ADV_NORMAL, 0)) != 0) 420 panic("startup: cannot allocate VM for buffers"); 421 buffers = (char *)minaddr; 422 base = bufpages / nbuf; 423 residual = bufpages % nbuf; 424 if (base >= MAXBSIZE) { 425 /* Don't want to alloc more physical mem than ever needed */ 426 base = MAXBSIZE; 427 residual = 0; 428 } 429 for (i = 0; i < nbuf; i++) { 430 vsize_t curbufsize; 431 vaddr_t curbuf; 432 struct vm_page *pg; 433 434 curbuf = (vaddr_t)buffers + i * MAXBSIZE; 435 curbufsize = NBPG * (i < residual ? base + 1 : base); 436 437 while (curbufsize) { 438 pg = uvm_pagealloc(NULL, 0, NULL, 0); 439 if (pg == NULL) 440 panic("cpu_startup: not enough memory for " 441 "buffer cache"); 442 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 443 VM_PROT_READ | VM_PROT_WRITE); 444 curbuf += PAGE_SIZE; 445 curbufsize -= PAGE_SIZE; 446 } 447 } 448 449 /* 450 * Allocate a submap for exec arguments. This map effectively 451 * limits the number of processes exec'ing at any time. 452 */ 453 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 454 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 455 456 /* 457 * Allocate a submap for physio 458 */ 459 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 460 VM_PHYS_SIZE, 0, FALSE, NULL); 461 462 /* 463 * No need to allocate an mbuf cluster submap. Mbuf clusters 464 * are allocated via the pool allocator, and we use direct-mapped 465 * pool pages. 466 */ 467 468 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 469 printf("avail memory = %s\n", pbuf); 470 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 471 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 472 473 /* 474 * Set up the buffers. 475 */ 476 bufinit(); 477 478 /* 479 * Set up the board properties database. 480 */ 481 if (!(board_info = propdb_create("board info"))) 482 panic("Cannot create board info database"); 483 484 if (board_info_set("mem-size", &board_data.mem_size, 485 sizeof(&board_data.mem_size), PROP_CONST, 0)) 486 panic("setting mem-size"); 487 if (board_info_set("emac-mac-addr", &board_data.mac_address_local, 488 sizeof(&board_data.mac_address_local), PROP_CONST, 0)) 489 panic("setting emac-mac-addr"); 490 if (board_info_set("sip0-mac-addr", &board_data.mac_address_pci, 491 sizeof(&board_data.mac_address_pci), PROP_CONST, 0)) 492 panic("setting sip0-mac-addr"); 493 if (board_info_set("processor-frequency", &board_data.processor_speed, 494 sizeof(&board_data.processor_speed), PROP_CONST, 0)) 495 panic("setting processor-frequency"); 496 #if NCOM > 0 497 { 498 unsigned int comfreq = COM_FREQ * 6; 499 if (board_info_set("com-opb-frequency", &comfreq, 500 sizeof(&comfreq), 0, 0)) 501 panic("setting com-opb-frequency"); 502 } 503 #endif 504 } 505 506 507 static void 508 dumpsys(void) 509 { 510 511 printf("dumpsys: TBD\n"); 512 } 513 514 /* 515 * Soft networking interrupts. 516 */ 517 void 518 softnet(void) 519 { 520 int isr; 521 522 isr = netisr; 523 netisr = 0; 524 525 #define DONETISR(bit, fn) do { \ 526 if (isr & (1 << bit)) \ 527 fn(); \ 528 } while (0) 529 530 #include <net/netisr_dispatch.h> 531 532 #undef DONETISR 533 534 } 535 536 /* 537 * Soft tty interrupts. 538 */ 539 void 540 softserial(void) 541 { 542 #if NCOM > 0 543 void comsoft(void); /* XXX from dev/ic/com.c */ 544 545 comsoft(); 546 #endif 547 } 548 549 /* 550 * Halt or reboot the machine after syncing/dumping according to howto. 551 */ 552 void 553 cpu_reboot(int howto, char *what) 554 { 555 static int syncing; 556 static char str[256]; 557 char *ap = str, *ap1 = ap; 558 559 boothowto = howto; 560 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 561 syncing = 1; 562 vfs_shutdown(); /* sync */ 563 resettodr(); /* set wall clock */ 564 } 565 566 splhigh(); 567 568 if (!cold && (howto & RB_DUMP)) 569 dumpsys(); 570 571 doshutdownhooks(); 572 573 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 574 /* Power off here if we know how...*/ 575 } 576 577 if (howto & RB_HALT) { 578 printf("halted\n\n"); 579 580 goto reboot; /* XXX for now... */ 581 582 #ifdef DDB 583 printf("dropping to debugger\n"); 584 while(1) 585 Debugger(); 586 #endif 587 } 588 589 printf("rebooting\n\n"); 590 if (what && *what) { 591 if (strlen(what) > sizeof str - 5) 592 printf("boot string too large, ignored\n"); 593 else { 594 strcpy(str, what); 595 ap1 = ap = str + strlen(str); 596 *ap++ = ' '; 597 } 598 } 599 *ap++ = '-'; 600 if (howto & RB_SINGLE) 601 *ap++ = 's'; 602 if (howto & RB_KDB) 603 *ap++ = 'd'; 604 *ap++ = 0; 605 if (ap[-2] == '-') 606 *ap1 = 0; 607 608 /* flush cache for msgbuf */ 609 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 610 611 reboot: 612 ppc4xx_reset(); 613 614 printf("ppc4xx_reset() failed!\n"); 615 #ifdef DDB 616 while(1) 617 Debugger(); 618 #else 619 while (1) 620 /* nothing */; 621 #endif 622 } 623 624 int 625 lcsplx(int ipl) 626 { 627 628 return spllower(ipl); /* XXX */ 629 } 630 631 void 632 mem_regions(struct mem_region **mem, struct mem_region **avail) 633 { 634 635 *mem = physmemr; 636 *avail = availmemr; 637 } 638
Indexes created Fri Oct 03 02:09:57 GMT 2025