machdep.c revision 1.3
1 /* $NetBSD: machdep.c,v 1.3 2003/01/17 22:48:44 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/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 struct pcb *curpcb; 131 struct pmap *curpm; 132 struct proc *fpuproc; /* XXX - shouldn't need this on fpu-less CPUs */ 133 134 extern struct user *proc0paddr; 135 136 char bootpath[256]; 137 paddr_t msgbuf_paddr; 138 vaddr_t msgbuf_vaddr; 139 140 #ifdef DDB 141 void *startsym, *endsym; 142 #endif 143 144 int lcsplx(int); 145 void initppc(u_int, u_int, char *, void *); 146 147 static void dumpsys(void); 148 static void install_extint(void (*)(void)); 149 150 #define MEMREGIONS 8 151 struct mem_region physmemr[MEMREGIONS]; /* Hard code memory */ 152 struct mem_region availmemr[MEMREGIONS]; /* Who's supposed to set these up? */ 153 154 struct board_cfg_data board_data; 155 struct propdb *board_info = NULL; 156 157 void 158 initppc(u_int startkernel, u_int endkernel, char *args, void *info_block) 159 { 160 extern int defaulttrap, defaultsize; 161 extern int sctrap, scsize; 162 extern int alitrap, alisize; 163 extern int dsitrap, dsisize; 164 extern int isitrap, isisize; 165 extern int mchktrap, mchksize; 166 extern int tlbimiss4xx, tlbim4size; 167 extern int tlbdmiss4xx, tlbdm4size; 168 extern int pitfitwdog, pitfitwdogsize; 169 extern int debugtrap, debugsize; 170 extern int errata51handler, errata51size; 171 #ifdef DDB 172 extern int ddblow, ddbsize; 173 #endif 174 #ifdef IPKDB 175 extern int ipkdblow, ipkdbsize; 176 #endif 177 int exc; 178 extern char _edata, _end; 179 struct cpu_info * const ci = &cpu_info_store; 180 181 /* Disable all external interrupts */ 182 mtdcr(DCR_UIC0_ER, 0); 183 184 /* Initialize cache info for memcpy, etc. */ 185 cpu_probe_cache(); 186 187 memset(&_edata, 0, &_end-&_edata); /* Clear BSS area */ 188 189 /* Save info block */ 190 if (info_block == NULL) 191 /* XXX why isn't r3 set correctly?!?!? */ 192 info_block = (void *)0x8e10; 193 memcpy(&board_data, info_block, sizeof(board_data)); 194 195 memset(physmemr, 0, sizeof physmemr); 196 memset(availmemr, 0, sizeof availmemr); 197 physmemr[0].start = 0; 198 physmemr[0].size = board_data.mem_size & ~PGOFSET; 199 /* Lower memory reserved by eval board BIOS */ 200 availmemr[0].start = startkernel; 201 availmemr[0].size = board_data.mem_size - availmemr[0].start; 202 203 /* 204 * Initialize lwp0 and current pcb and pmap pointers. 205 */ 206 lwp0.l_cpu = ci; 207 lwp0.l_addr = proc0paddr; 208 memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr); 209 210 curpcb = &proc0paddr->u_pcb; 211 curpm = curpcb->pcb_pmreal = curpcb->pcb_pm = pmap_kernel(); 212 213 /* 214 * Set up trap vectors 215 */ 216 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 217 switch (exc) { 218 default: 219 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 220 break; 221 case EXC_EXI: 222 /* 223 * This one is (potentially) installed during autoconf 224 */ 225 break; 226 case EXC_SC: 227 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 228 break; 229 case EXC_ALI: 230 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 231 break; 232 case EXC_DSI: 233 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 234 break; 235 case EXC_ISI: 236 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 237 break; 238 case EXC_MCHK: 239 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 240 break; 241 case EXC_ITMISS: 242 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 243 (size_t)&tlbim4size); 244 break; 245 case EXC_DTMISS: 246 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 247 (size_t)&tlbdm4size); 248 break; 249 /* 250 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 251 * are spaced by 0x10 bytes only.. 252 */ 253 case EXC_PIT: 254 memcpy((void *)EXC_PIT, &pitfitwdog, 255 (size_t)&pitfitwdogsize); 256 break; 257 case EXC_DEBUG: 258 memcpy((void *)EXC_DEBUG, &debugtrap, 259 (size_t)&debugsize); 260 break; 261 case EXC_DTMISS|EXC_ALI: 262 /* PPC405GP Rev D errata item 51 */ 263 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 264 (size_t)&errata51size); 265 break; 266 #if defined(DDB) || defined(IPKDB) 267 case EXC_PGM: 268 #if defined(DDB) 269 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 270 #elif defined(IPKDB) 271 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 272 #endif 273 #endif /* DDB | IPKDB */ 274 break; 275 } 276 277 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 278 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 279 consinit(); 280 281 /* Handle trap instruction as PGM exception */ 282 { 283 int dbcr0; 284 asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 285 asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 286 } 287 288 /* 289 * external interrupt handler install 290 */ 291 install_extint(ext_intr); 292 293 /* 294 * Now enable translation (and machine checks/recoverable interrupts). 295 */ 296 asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 297 : : "r"(0), "K"(PSL_IR|PSL_DR)); 298 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 299 300 uvm_setpagesize(); 301 302 /* 303 * Initialize pmap module. 304 */ 305 pmap_bootstrap(startkernel, endkernel); 306 307 consinit(); 308 309 #ifdef DEBUG 310 printf("Board config data:\n"); 311 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 312 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 313 printf(" mem_size = %u\n", board_data.mem_size); 314 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 315 board_data.mac_address_local[0], board_data.mac_address_local[1], 316 board_data.mac_address_local[2], board_data.mac_address_local[3], 317 board_data.mac_address_local[4], board_data.mac_address_local[5]); 318 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 319 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 320 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 321 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 322 printf(" processor_speed = %u\n", board_data.processor_speed); 323 printf(" plb_speed = %u\n", board_data.plb_speed); 324 printf(" pci_speed = %u\n", board_data.pci_speed); 325 #endif 326 327 #ifdef DDB 328 ddb_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 329 if (boothowto & RB_KDB) 330 Debugger(); 331 #endif 332 #ifdef IPKDB 333 /* 334 * Now trap to IPKDB 335 */ 336 ipkdb_init(); 337 if (boothowto & RB_KDB) 338 ipkdb_connect(0); 339 #endif 340 fake_mapiodev = 0; 341 } 342 343 static void 344 install_extint(void (*handler)(void)) 345 { 346 extern int extint, extsize; 347 extern u_long extint_call; 348 u_long offset = (u_long)handler - (u_long)&extint_call; 349 int omsr, msr; 350 351 #ifdef DIAGNOSTIC 352 if (offset > 0x1ffffff) 353 panic("install_extint: too far away"); 354 #endif 355 asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1" 356 : "=r"(omsr), "=r"(msr) : "K"((u_short)~PSL_EE)); 357 extint_call = (extint_call & 0xfc000003) | offset; 358 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 359 __syncicache((void *)&extint_call, sizeof extint_call); 360 __syncicache((void *)EXC_EXI, (int)&extsize); 361 asm volatile ("mtmsr %0" :: "r"(omsr)); 362 } 363 364 /* 365 * Machine dependent startup code. 366 */ 367 368 char msgbuf[MSGBUFSIZE]; 369 370 void 371 cpu_startup(void) 372 { 373 caddr_t v; 374 vaddr_t minaddr, maxaddr; 375 u_int sz, i, base, residual; 376 char pbuf[9]; 377 378 /* 379 * Initialize error message buffer (at end of core). 380 */ 381 #if 0 /* For some reason this fails... --Artem 382 * Besides, do we really have to put it at the end of core? 383 * Let's use static buffer for now 384 */ 385 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE)))) 386 panic("startup: no room for message buffer"); 387 for (i = 0; i < btoc(MSGBUFSIZE); i++) 388 pmap_kenter_pa(msgbuf_vaddr + i * NBPG, 389 msgbuf_paddr + i * NBPG, VM_PROT_READ|VM_PROT_WRITE); 390 initmsgbuf((caddr_t)msgbuf_vaddr, round_page(MSGBUFSIZE)); 391 #else 392 initmsgbuf((caddr_t)msgbuf, round_page(MSGBUFSIZE)); 393 #endif 394 395 396 printf("%s", version); 397 printf("Walnut PowerPC 405GP Evaluation Board\n"); 398 399 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 400 printf("total memory = %s\n", pbuf); 401 402 /* 403 * Find out how much space we need, allocate it, 404 * and then give everything true virtual addresses. 405 */ 406 sz = (u_int)allocsys(NULL, NULL); 407 if ((v = (caddr_t)uvm_km_zalloc(kernel_map, round_page(sz))) == 0) 408 panic("startup: no room for tables"); 409 if (allocsys(v, NULL) - v != sz) 410 panic("startup: table size inconsistency"); 411 412 /* 413 * Now allocate buffers proper. They are different than the above 414 * in that they usually occupy more virtual memory than physical. 415 */ 416 sz = MAXBSIZE * nbuf; 417 minaddr = 0; 418 if (uvm_map(kernel_map, (vaddr_t *)&minaddr, round_page(sz), 419 NULL, UVM_UNKNOWN_OFFSET, 0, 420 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 421 UVM_ADV_NORMAL, 0)) != 0) 422 panic("startup: cannot allocate VM for buffers"); 423 buffers = (char *)minaddr; 424 base = bufpages / nbuf; 425 residual = bufpages % nbuf; 426 if (base >= MAXBSIZE) { 427 /* Don't want to alloc more physical mem than ever needed */ 428 base = MAXBSIZE; 429 residual = 0; 430 } 431 for (i = 0; i < nbuf; i++) { 432 vsize_t curbufsize; 433 vaddr_t curbuf; 434 struct vm_page *pg; 435 436 curbuf = (vaddr_t)buffers + i * MAXBSIZE; 437 curbufsize = NBPG * (i < residual ? base + 1 : base); 438 439 while (curbufsize) { 440 pg = uvm_pagealloc(NULL, 0, NULL, 0); 441 if (pg == NULL) 442 panic("cpu_startup: not enough memory for " 443 "buffer cache"); 444 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 445 VM_PROT_READ | VM_PROT_WRITE); 446 curbuf += PAGE_SIZE; 447 curbufsize -= PAGE_SIZE; 448 } 449 } 450 451 /* 452 * Allocate a submap for exec arguments. This map effectively 453 * limits the number of processes exec'ing at any time. 454 */ 455 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 456 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 457 458 /* 459 * Allocate a submap for physio 460 */ 461 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 462 VM_PHYS_SIZE, 0, FALSE, NULL); 463 464 /* 465 * No need to allocate an mbuf cluster submap. Mbuf clusters 466 * are allocated via the pool allocator, and we use direct-mapped 467 * pool pages. 468 */ 469 470 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 471 printf("avail memory = %s\n", pbuf); 472 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 473 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 474 475 /* 476 * Set up the buffers. 477 */ 478 bufinit(); 479 480 /* 481 * Set up the board properties database. 482 */ 483 if (!(board_info = propdb_create("board info"))) 484 panic("Cannot create board info database"); 485 486 if (board_info_set("mem-size", &board_data.mem_size, 487 sizeof(&board_data.mem_size), PROP_CONST, 0)) 488 panic("setting mem-size"); 489 if (board_info_set("emac-mac-addr", &board_data.mac_address_local, 490 sizeof(&board_data.mac_address_local), PROP_CONST, 0)) 491 panic("setting emac-mac-addr"); 492 if (board_info_set("sip0-mac-addr", &board_data.mac_address_pci, 493 sizeof(&board_data.mac_address_pci), PROP_CONST, 0)) 494 panic("setting sip0-mac-addr"); 495 if (board_info_set("processor-frequency", &board_data.processor_speed, 496 sizeof(&board_data.processor_speed), PROP_CONST, 0)) 497 panic("setting processor-frequency"); 498 #if NCOM > 0 499 { 500 unsigned int comfreq = COM_FREQ * 6; 501 if (board_info_set("com-opb-frequency", &comfreq, 502 sizeof(&comfreq), 0, 0)) 503 panic("setting com-opb-frequency"); 504 } 505 #endif 506 } 507 508 509 static void 510 dumpsys(void) 511 { 512 513 printf("dumpsys: TBD\n"); 514 } 515 516 /* 517 * Soft networking interrupts. 518 */ 519 void 520 softnet(void) 521 { 522 int isr; 523 524 isr = netisr; 525 netisr = 0; 526 527 #define DONETISR(bit, fn) do { \ 528 if (isr & (1 << bit)) \ 529 fn(); \ 530 } while (0) 531 532 #include <net/netisr_dispatch.h> 533 534 #undef DONETISR 535 536 } 537 538 /* 539 * Soft tty interrupts. 540 */ 541 void 542 softserial(void) 543 { 544 #if NCOM > 0 545 void comsoft(void); /* XXX from dev/ic/com.c */ 546 547 comsoft(); 548 #endif 549 } 550 551 /* 552 * Halt or reboot the machine after syncing/dumping according to howto. 553 */ 554 void 555 cpu_reboot(int howto, char *what) 556 { 557 static int syncing; 558 static char str[256]; 559 char *ap = str, *ap1 = ap; 560 561 boothowto = howto; 562 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 563 syncing = 1; 564 vfs_shutdown(); /* sync */ 565 resettodr(); /* set wall clock */ 566 } 567 568 splhigh(); 569 570 if (!cold && (howto & RB_DUMP)) 571 dumpsys(); 572 573 doshutdownhooks(); 574 575 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 576 /* Power off here if we know how...*/ 577 } 578 579 if (howto & RB_HALT) { 580 printf("halted\n\n"); 581 582 goto reboot; /* XXX for now... */ 583 584 #ifdef DDB 585 printf("dropping to debugger\n"); 586 while(1) 587 Debugger(); 588 #endif 589 } 590 591 printf("rebooting\n\n"); 592 if (what && *what) { 593 if (strlen(what) > sizeof str - 5) 594 printf("boot string too large, ignored\n"); 595 else { 596 strcpy(str, what); 597 ap1 = ap = str + strlen(str); 598 *ap++ = ' '; 599 } 600 } 601 *ap++ = '-'; 602 if (howto & RB_SINGLE) 603 *ap++ = 's'; 604 if (howto & RB_KDB) 605 *ap++ = 'd'; 606 *ap++ = 0; 607 if (ap[-2] == '-') 608 *ap1 = 0; 609 610 /* flush cache for msgbuf */ 611 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 612 613 reboot: 614 ppc4xx_reset(); 615 616 printf("ppc4xx_reset() failed!\n"); 617 #ifdef DDB 618 while(1) 619 Debugger(); 620 #else 621 while (1) 622 /* nothing */; 623 #endif 624 } 625 626 int 627 lcsplx(int ipl) 628 { 629 630 return spllower(ipl); /* XXX */ 631 } 632 633 void 634 mem_regions(struct mem_region **mem, struct mem_region **avail) 635 { 636 637 *mem = physmemr; 638 *avail = availmemr; 639 } 640
Indexes created Fri Oct 03 02:09:57 GMT 2025