machdep.c revision 1.5
1 /* $NetBSD: machdep.c,v 1.5 2003/02/02 20:43:19 matt 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 91 #include <uvm/uvm_extern.h> 92 93 #include <net/netisr.h> 94 95 #include <machine/bus.h> 96 #include <machine/powerpc.h> 97 #include <machine/trap.h> 98 #include <machine/walnut.h> 99 #include <machine/dcr.h> 100 101 #include <powerpc/spr.h> 102 #include <machine/bus.h> 103 104 #include <dev/cons.h> 105 106 #ifdef DDB 107 #include <machine/db_machdep.h> 108 #include <ddb/db_extern.h> 109 #endif 110 111 #include "com.h" 112 #if NCOM > 0 113 #include <dev/ic/comreg.h> /* For COM_FREQ */ 114 #endif 115 116 /* 117 * Global variables used here and there 118 */ 119 struct vm_map *exec_map = NULL; 120 struct vm_map *mb_map = NULL; 121 struct vm_map *phys_map = NULL; 122 123 /* 124 * This should probably be in autoconf! XXX 125 */ 126 char cpu_model[80]; 127 char machine[] = MACHINE; /* from <machine/param.h> */ 128 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 129 130 extern struct user *proc0paddr; 131 132 char bootpath[256]; 133 paddr_t msgbuf_paddr; 134 vaddr_t msgbuf_vaddr; 135 136 #ifdef DDB 137 void *startsym, *endsym; 138 #endif 139 140 int lcsplx(int); 141 void initppc(u_int, u_int, char *, void *); 142 143 static void dumpsys(void); 144 static void install_extint(void (*)(void)); 145 146 #define MEMREGIONS 8 147 struct mem_region physmemr[MEMREGIONS]; /* Hard code memory */ 148 struct mem_region availmemr[MEMREGIONS]; /* Who's supposed to set these up? */ 149 150 struct board_cfg_data board_data; 151 struct propdb *board_info = NULL; 152 153 void 154 initppc(u_int startkernel, u_int endkernel, char *args, void *info_block) 155 { 156 extern int defaulttrap, defaultsize; 157 extern int sctrap, scsize; 158 extern int alitrap, alisize; 159 extern int dsitrap, dsisize; 160 extern int isitrap, isisize; 161 extern int mchktrap, mchksize; 162 extern int tlbimiss4xx, tlbim4size; 163 extern int tlbdmiss4xx, tlbdm4size; 164 extern int pitfitwdog, pitfitwdogsize; 165 extern int debugtrap, debugsize; 166 extern int errata51handler, errata51size; 167 #ifdef DDB 168 extern int ddblow, ddbsize; 169 #endif 170 #ifdef IPKDB 171 extern int ipkdblow, ipkdbsize; 172 #endif 173 int exc; 174 extern char _edata, _end; 175 struct cpu_info * const ci = &cpu_info[0]; 176 177 /* Set the curcpu() pointer */ 178 mtspr(SPR_SPRG0, ci); 179 180 /* Disable all external interrupts */ 181 mtdcr(DCR_UIC0_ER, 0); 182 183 /* Initialize cache info for memcpy, etc. */ 184 cpu_probe_cache(); 185 186 memset(&_edata, 0, &_end-&_edata); /* Clear BSS area */ 187 188 /* Save info block */ 189 if (info_block == NULL) 190 /* XXX why isn't r3 set correctly?!?!? */ 191 info_block = (void *)0x8e10; 192 memcpy(&board_data, info_block, sizeof(board_data)); 193 194 memset(physmemr, 0, sizeof physmemr); 195 memset(availmemr, 0, sizeof availmemr); 196 physmemr[0].start = 0; 197 physmemr[0].size = board_data.mem_size & ~PGOFSET; 198 /* Lower memory reserved by eval board BIOS */ 199 availmemr[0].start = startkernel; 200 availmemr[0].size = board_data.mem_size - availmemr[0].start; 201 202 /* 203 * Initialize lwp0 and current pcb and pmap pointers. 204 */ 205 lwp0.l_cpu = ci; 206 lwp0.l_addr = proc0paddr; 207 memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr); 208 209 curpcb = &proc0paddr->u_pcb; 210 curpm = curpcb->pcb_pmreal = curpcb->pcb_pm = pmap_kernel(); 211 212 /* 213 * Set up trap vectors 214 */ 215 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 216 switch (exc) { 217 default: 218 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 219 break; 220 case EXC_EXI: 221 /* 222 * This one is (potentially) installed during autoconf 223 */ 224 break; 225 case EXC_SC: 226 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 227 break; 228 case EXC_ALI: 229 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 230 break; 231 case EXC_DSI: 232 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 233 break; 234 case EXC_ISI: 235 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 236 break; 237 case EXC_MCHK: 238 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 239 break; 240 case EXC_ITMISS: 241 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 242 (size_t)&tlbim4size); 243 break; 244 case EXC_DTMISS: 245 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 246 (size_t)&tlbdm4size); 247 break; 248 /* 249 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 250 * are spaced by 0x10 bytes only.. 251 */ 252 case EXC_PIT: 253 memcpy((void *)EXC_PIT, &pitfitwdog, 254 (size_t)&pitfitwdogsize); 255 break; 256 case EXC_DEBUG: 257 memcpy((void *)EXC_DEBUG, &debugtrap, 258 (size_t)&debugsize); 259 break; 260 case EXC_DTMISS|EXC_ALI: 261 /* PPC405GP Rev D errata item 51 */ 262 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 263 (size_t)&errata51size); 264 break; 265 #if defined(DDB) || defined(IPKDB) 266 case EXC_PGM: 267 #if defined(DDB) 268 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 269 #elif defined(IPKDB) 270 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 271 #endif 272 #endif /* DDB | IPKDB */ 273 break; 274 } 275 276 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 277 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 278 consinit(); 279 280 /* Handle trap instruction as PGM exception */ 281 { 282 int dbcr0; 283 asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 284 asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 285 } 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 consinit(); 307 308 #ifdef DEBUG 309 printf("Board config data:\n"); 310 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 311 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 312 printf(" mem_size = %u\n", board_data.mem_size); 313 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 314 board_data.mac_address_local[0], board_data.mac_address_local[1], 315 board_data.mac_address_local[2], board_data.mac_address_local[3], 316 board_data.mac_address_local[4], board_data.mac_address_local[5]); 317 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 318 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 319 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 320 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 321 printf(" processor_speed = %u\n", board_data.processor_speed); 322 printf(" plb_speed = %u\n", board_data.plb_speed); 323 printf(" pci_speed = %u\n", board_data.pci_speed); 324 #endif 325 326 #ifdef DDB 327 ddb_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 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 fake_mapiodev = 0; 340 } 341 342 static void 343 install_extint(void (*handler)(void)) 344 { 345 extern int extint, extsize; 346 extern u_long extint_call; 347 u_long offset = (u_long)handler - (u_long)&extint_call; 348 int omsr, msr; 349 350 #ifdef DIAGNOSTIC 351 if (offset > 0x1ffffff) 352 panic("install_extint: too far away"); 353 #endif 354 asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1" 355 : "=r"(omsr), "=r"(msr) : "K"((u_short)~PSL_EE)); 356 extint_call = (extint_call & 0xfc000003) | offset; 357 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 358 __syncicache((void *)&extint_call, sizeof extint_call); 359 __syncicache((void *)EXC_EXI, (int)&extsize); 360 asm volatile ("mtmsr %0" :: "r"(omsr)); 361 } 362 363 /* 364 * Machine dependent startup code. 365 */ 366 367 char msgbuf[MSGBUFSIZE]; 368 369 void 370 cpu_startup(void) 371 { 372 caddr_t v; 373 vaddr_t minaddr, maxaddr; 374 u_int sz, i, base, residual; 375 char pbuf[9]; 376 377 /* 378 * Initialize error message buffer (at end of core). 379 */ 380 #if 0 /* For some reason this fails... --Artem 381 * Besides, do we really have to put it at the end of core? 382 * Let's use static buffer for now 383 */ 384 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE)))) 385 panic("startup: no room for message buffer"); 386 for (i = 0; i < btoc(MSGBUFSIZE); i++) 387 pmap_kenter_pa(msgbuf_vaddr + i * NBPG, 388 msgbuf_paddr + i * NBPG, VM_PROT_READ|VM_PROT_WRITE); 389 initmsgbuf((caddr_t)msgbuf_vaddr, round_page(MSGBUFSIZE)); 390 #else 391 initmsgbuf((caddr_t)msgbuf, round_page(MSGBUFSIZE)); 392 #endif 393 394 395 printf("%s", version); 396 printf("Walnut PowerPC 405GP Evaluation Board\n"); 397 398 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 399 printf("total memory = %s\n", pbuf); 400 401 /* 402 * Find out how much space we need, allocate it, 403 * and then give everything true virtual addresses. 404 */ 405 sz = (u_int)allocsys(NULL, NULL); 406 if ((v = (caddr_t)uvm_km_zalloc(kernel_map, round_page(sz))) == 0) 407 panic("startup: no room for tables"); 408 if (allocsys(v, NULL) - v != sz) 409 panic("startup: table size inconsistency"); 410 411 /* 412 * Now allocate buffers proper. They are different than the above 413 * in that they usually occupy more virtual memory than physical. 414 */ 415 sz = MAXBSIZE * nbuf; 416 minaddr = 0; 417 if (uvm_map(kernel_map, (vaddr_t *)&minaddr, round_page(sz), 418 NULL, UVM_UNKNOWN_OFFSET, 0, 419 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 420 UVM_ADV_NORMAL, 0)) != 0) 421 panic("startup: cannot allocate VM for buffers"); 422 buffers = (char *)minaddr; 423 base = bufpages / nbuf; 424 residual = bufpages % nbuf; 425 if (base >= MAXBSIZE) { 426 /* Don't want to alloc more physical mem than ever needed */ 427 base = MAXBSIZE; 428 residual = 0; 429 } 430 for (i = 0; i < nbuf; i++) { 431 vsize_t curbufsize; 432 vaddr_t curbuf; 433 struct vm_page *pg; 434 435 curbuf = (vaddr_t)buffers + i * MAXBSIZE; 436 curbufsize = NBPG * (i < residual ? base + 1 : base); 437 438 while (curbufsize) { 439 pg = uvm_pagealloc(NULL, 0, NULL, 0); 440 if (pg == NULL) 441 panic("cpu_startup: not enough memory for " 442 "buffer cache"); 443 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 444 VM_PROT_READ | VM_PROT_WRITE); 445 curbuf += PAGE_SIZE; 446 curbufsize -= PAGE_SIZE; 447 } 448 } 449 450 /* 451 * Allocate a submap for exec arguments. This map effectively 452 * limits the number of processes exec'ing at any time. 453 */ 454 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 455 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 456 457 /* 458 * Allocate a submap for physio 459 */ 460 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 461 VM_PHYS_SIZE, 0, FALSE, NULL); 462 463 /* 464 * No need to allocate an mbuf cluster submap. Mbuf clusters 465 * are allocated via the pool allocator, and we use direct-mapped 466 * pool pages. 467 */ 468 469 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 470 printf("avail memory = %s\n", pbuf); 471 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 472 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 473 474 /* 475 * Set up the buffers. 476 */ 477 bufinit(); 478 479 /* 480 * Set up the board properties database. 481 */ 482 if (!(board_info = propdb_create("board info"))) 483 panic("Cannot create board info database"); 484 485 if (board_info_set("mem-size", &board_data.mem_size, 486 sizeof(&board_data.mem_size), PROP_CONST, 0)) 487 panic("setting mem-size"); 488 if (board_info_set("emac-mac-addr", &board_data.mac_address_local, 489 sizeof(&board_data.mac_address_local), PROP_CONST, 0)) 490 panic("setting emac-mac-addr"); 491 if (board_info_set("sip0-mac-addr", &board_data.mac_address_pci, 492 sizeof(&board_data.mac_address_pci), PROP_CONST, 0)) 493 panic("setting sip0-mac-addr"); 494 if (board_info_set("processor-frequency", &board_data.processor_speed, 495 sizeof(&board_data.processor_speed), PROP_CONST, 0)) 496 panic("setting processor-frequency"); 497 #if NCOM > 0 498 { 499 unsigned int comfreq = COM_FREQ * 6; 500 if (board_info_set("com-opb-frequency", &comfreq, 501 sizeof(&comfreq), 0, 0)) 502 panic("setting com-opb-frequency"); 503 } 504 #endif 505 } 506 507 508 static void 509 dumpsys(void) 510 { 511 512 printf("dumpsys: TBD\n"); 513 } 514 515 /* 516 * Soft networking interrupts. 517 */ 518 void 519 softnet(void) 520 { 521 int isr; 522 523 isr = netisr; 524 netisr = 0; 525 526 #define DONETISR(bit, fn) do { \ 527 if (isr & (1 << bit)) \ 528 fn(); \ 529 } while (0) 530 531 #include <net/netisr_dispatch.h> 532 533 #undef DONETISR 534 535 } 536 537 /* 538 * Soft tty interrupts. 539 */ 540 void 541 softserial(void) 542 { 543 #if NCOM > 0 544 void comsoft(void); /* XXX from dev/ic/com.c */ 545 546 comsoft(); 547 #endif 548 } 549 550 /* 551 * Halt or reboot the machine after syncing/dumping according to howto. 552 */ 553 void 554 cpu_reboot(int howto, char *what) 555 { 556 static int syncing; 557 static char str[256]; 558 char *ap = str, *ap1 = ap; 559 560 boothowto = howto; 561 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 562 syncing = 1; 563 vfs_shutdown(); /* sync */ 564 resettodr(); /* set wall clock */ 565 } 566 567 splhigh(); 568 569 if (!cold && (howto & RB_DUMP)) 570 dumpsys(); 571 572 doshutdownhooks(); 573 574 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 575 /* Power off here if we know how...*/ 576 } 577 578 if (howto & RB_HALT) { 579 printf("halted\n\n"); 580 581 goto reboot; /* XXX for now... */ 582 583 #ifdef DDB 584 printf("dropping to debugger\n"); 585 while(1) 586 Debugger(); 587 #endif 588 } 589 590 printf("rebooting\n\n"); 591 if (what && *what) { 592 if (strlen(what) > sizeof str - 5) 593 printf("boot string too large, ignored\n"); 594 else { 595 strcpy(str, what); 596 ap1 = ap = str + strlen(str); 597 *ap++ = ' '; 598 } 599 } 600 *ap++ = '-'; 601 if (howto & RB_SINGLE) 602 *ap++ = 's'; 603 if (howto & RB_KDB) 604 *ap++ = 'd'; 605 *ap++ = 0; 606 if (ap[-2] == '-') 607 *ap1 = 0; 608 609 /* flush cache for msgbuf */ 610 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 611 612 reboot: 613 ppc4xx_reset(); 614 615 printf("ppc4xx_reset() failed!\n"); 616 #ifdef DDB 617 while(1) 618 Debugger(); 619 #else 620 while (1) 621 /* nothing */; 622 #endif 623 } 624 625 int 626 lcsplx(int ipl) 627 { 628 629 return spllower(ipl); /* XXX */ 630 } 631 632 void 633 mem_regions(struct mem_region **mem, struct mem_region **avail) 634 { 635 636 *mem = physmemr; 637 *avail = availmemr; 638 } 639
Indexes created Wed Oct 22 13:09:56 GMT 2025