machdep.c revision 1.4
1 /* $NetBSD: machdep.c,v 1.4 2003/01/30 07:46:28 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 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 /* Set the curcpu() pointer */ 182 mtspr(SPR_SPRG0, ci); 183 184 /* Disable all external interrupts */ 185 mtdcr(DCR_UIC0_ER, 0); 186 187 /* Initialize cache info for memcpy, etc. */ 188 cpu_probe_cache(); 189 190 memset(&_edata, 0, &_end-&_edata); /* Clear BSS area */ 191 192 /* Save info block */ 193 if (info_block == NULL) 194 /* XXX why isn't r3 set correctly?!?!? */ 195 info_block = (void *)0x8e10; 196 memcpy(&board_data, info_block, sizeof(board_data)); 197 198 memset(physmemr, 0, sizeof physmemr); 199 memset(availmemr, 0, sizeof availmemr); 200 physmemr[0].start = 0; 201 physmemr[0].size = board_data.mem_size & ~PGOFSET; 202 /* Lower memory reserved by eval board BIOS */ 203 availmemr[0].start = startkernel; 204 availmemr[0].size = board_data.mem_size - availmemr[0].start; 205 206 /* 207 * Initialize lwp0 and current pcb and pmap pointers. 208 */ 209 lwp0.l_cpu = ci; 210 lwp0.l_addr = proc0paddr; 211 memset(lwp0.l_addr, 0, sizeof *lwp0.l_addr); 212 213 curpcb = &proc0paddr->u_pcb; 214 curpm = curpcb->pcb_pmreal = curpcb->pcb_pm = pmap_kernel(); 215 216 /* 217 * Set up trap vectors 218 */ 219 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 220 switch (exc) { 221 default: 222 memcpy((void *)exc, &defaulttrap, (size_t)&defaultsize); 223 break; 224 case EXC_EXI: 225 /* 226 * This one is (potentially) installed during autoconf 227 */ 228 break; 229 case EXC_SC: 230 memcpy((void *)EXC_SC, &sctrap, (size_t)&scsize); 231 break; 232 case EXC_ALI: 233 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 234 break; 235 case EXC_DSI: 236 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 237 break; 238 case EXC_ISI: 239 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 240 break; 241 case EXC_MCHK: 242 memcpy((void *)EXC_MCHK, &mchktrap, (size_t)&mchksize); 243 break; 244 case EXC_ITMISS: 245 memcpy((void *)EXC_ITMISS, &tlbimiss4xx, 246 (size_t)&tlbim4size); 247 break; 248 case EXC_DTMISS: 249 memcpy((void *)EXC_DTMISS, &tlbdmiss4xx, 250 (size_t)&tlbdm4size); 251 break; 252 /* 253 * EXC_PIT, EXC_FIT, EXC_WDOG handlers 254 * are spaced by 0x10 bytes only.. 255 */ 256 case EXC_PIT: 257 memcpy((void *)EXC_PIT, &pitfitwdog, 258 (size_t)&pitfitwdogsize); 259 break; 260 case EXC_DEBUG: 261 memcpy((void *)EXC_DEBUG, &debugtrap, 262 (size_t)&debugsize); 263 break; 264 case EXC_DTMISS|EXC_ALI: 265 /* PPC405GP Rev D errata item 51 */ 266 memcpy((void *)(EXC_DTMISS|EXC_ALI), &errata51handler, 267 (size_t)&errata51size); 268 break; 269 #if defined(DDB) || defined(IPKDB) 270 case EXC_PGM: 271 #if defined(DDB) 272 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 273 #elif defined(IPKDB) 274 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 275 #endif 276 #endif /* DDB | IPKDB */ 277 break; 278 } 279 280 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 281 mtspr(SPR_EVPR, 0); /* Set Exception vector base */ 282 consinit(); 283 284 /* Handle trap instruction as PGM exception */ 285 { 286 int dbcr0; 287 asm volatile("mfspr %0,%1":"=r"(dbcr0):"K"(SPR_DBCR0)); 288 asm volatile("mtspr %0,%1"::"K"(SPR_DBCR0),"r"(dbcr0 & ~DBCR0_TDE)); 289 } 290 291 /* 292 * external interrupt handler install 293 */ 294 install_extint(ext_intr); 295 296 /* 297 * Now enable translation (and machine checks/recoverable interrupts). 298 */ 299 asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 300 : : "r"(0), "K"(PSL_IR|PSL_DR)); 301 /* XXXX PSL_ME - With ME set kernel gets stuck... */ 302 303 uvm_setpagesize(); 304 305 /* 306 * Initialize pmap module. 307 */ 308 pmap_bootstrap(startkernel, endkernel); 309 310 consinit(); 311 312 #ifdef DEBUG 313 printf("Board config data:\n"); 314 printf(" usr_config_ver = %s\n", board_data.usr_config_ver); 315 printf(" rom_sw_ver = %s\n", board_data.rom_sw_ver); 316 printf(" mem_size = %u\n", board_data.mem_size); 317 printf(" mac_address_local = %02x:%02x:%02x:%02x:%02x:%02x\n", 318 board_data.mac_address_local[0], board_data.mac_address_local[1], 319 board_data.mac_address_local[2], board_data.mac_address_local[3], 320 board_data.mac_address_local[4], board_data.mac_address_local[5]); 321 printf(" mac_address_pci = %02x:%02x:%02x:%02x:%02x:%02x\n", 322 board_data.mac_address_pci[0], board_data.mac_address_pci[1], 323 board_data.mac_address_pci[2], board_data.mac_address_pci[3], 324 board_data.mac_address_pci[4], board_data.mac_address_pci[5]); 325 printf(" processor_speed = %u\n", board_data.processor_speed); 326 printf(" plb_speed = %u\n", board_data.plb_speed); 327 printf(" pci_speed = %u\n", board_data.pci_speed); 328 #endif 329 330 #ifdef DDB 331 ddb_init((int)((u_int)endsym - (u_int)startsym), startsym, endsym); 332 if (boothowto & RB_KDB) 333 Debugger(); 334 #endif 335 #ifdef IPKDB 336 /* 337 * Now trap to IPKDB 338 */ 339 ipkdb_init(); 340 if (boothowto & RB_KDB) 341 ipkdb_connect(0); 342 #endif 343 fake_mapiodev = 0; 344 } 345 346 static void 347 install_extint(void (*handler)(void)) 348 { 349 extern int extint, extsize; 350 extern u_long extint_call; 351 u_long offset = (u_long)handler - (u_long)&extint_call; 352 int omsr, msr; 353 354 #ifdef DIAGNOSTIC 355 if (offset > 0x1ffffff) 356 panic("install_extint: too far away"); 357 #endif 358 asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1" 359 : "=r"(omsr), "=r"(msr) : "K"((u_short)~PSL_EE)); 360 extint_call = (extint_call & 0xfc000003) | offset; 361 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 362 __syncicache((void *)&extint_call, sizeof extint_call); 363 __syncicache((void *)EXC_EXI, (int)&extsize); 364 asm volatile ("mtmsr %0" :: "r"(omsr)); 365 } 366 367 /* 368 * Machine dependent startup code. 369 */ 370 371 char msgbuf[MSGBUFSIZE]; 372 373 void 374 cpu_startup(void) 375 { 376 caddr_t v; 377 vaddr_t minaddr, maxaddr; 378 u_int sz, i, base, residual; 379 char pbuf[9]; 380 381 /* 382 * Initialize error message buffer (at end of core). 383 */ 384 #if 0 /* For some reason this fails... --Artem 385 * Besides, do we really have to put it at the end of core? 386 * Let's use static buffer for now 387 */ 388 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE)))) 389 panic("startup: no room for message buffer"); 390 for (i = 0; i < btoc(MSGBUFSIZE); i++) 391 pmap_kenter_pa(msgbuf_vaddr + i * NBPG, 392 msgbuf_paddr + i * NBPG, VM_PROT_READ|VM_PROT_WRITE); 393 initmsgbuf((caddr_t)msgbuf_vaddr, round_page(MSGBUFSIZE)); 394 #else 395 initmsgbuf((caddr_t)msgbuf, round_page(MSGBUFSIZE)); 396 #endif 397 398 399 printf("%s", version); 400 printf("Walnut PowerPC 405GP Evaluation Board\n"); 401 402 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 403 printf("total memory = %s\n", pbuf); 404 405 /* 406 * Find out how much space we need, allocate it, 407 * and then give everything true virtual addresses. 408 */ 409 sz = (u_int)allocsys(NULL, NULL); 410 if ((v = (caddr_t)uvm_km_zalloc(kernel_map, round_page(sz))) == 0) 411 panic("startup: no room for tables"); 412 if (allocsys(v, NULL) - v != sz) 413 panic("startup: table size inconsistency"); 414 415 /* 416 * Now allocate buffers proper. They are different than the above 417 * in that they usually occupy more virtual memory than physical. 418 */ 419 sz = MAXBSIZE * nbuf; 420 minaddr = 0; 421 if (uvm_map(kernel_map, (vaddr_t *)&minaddr, round_page(sz), 422 NULL, UVM_UNKNOWN_OFFSET, 0, 423 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 424 UVM_ADV_NORMAL, 0)) != 0) 425 panic("startup: cannot allocate VM for buffers"); 426 buffers = (char *)minaddr; 427 base = bufpages / nbuf; 428 residual = bufpages % nbuf; 429 if (base >= MAXBSIZE) { 430 /* Don't want to alloc more physical mem than ever needed */ 431 base = MAXBSIZE; 432 residual = 0; 433 } 434 for (i = 0; i < nbuf; i++) { 435 vsize_t curbufsize; 436 vaddr_t curbuf; 437 struct vm_page *pg; 438 439 curbuf = (vaddr_t)buffers + i * MAXBSIZE; 440 curbufsize = NBPG * (i < residual ? base + 1 : base); 441 442 while (curbufsize) { 443 pg = uvm_pagealloc(NULL, 0, NULL, 0); 444 if (pg == NULL) 445 panic("cpu_startup: not enough memory for " 446 "buffer cache"); 447 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 448 VM_PROT_READ | VM_PROT_WRITE); 449 curbuf += PAGE_SIZE; 450 curbufsize -= PAGE_SIZE; 451 } 452 } 453 454 /* 455 * Allocate a submap for exec arguments. This map effectively 456 * limits the number of processes exec'ing at any time. 457 */ 458 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 459 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 460 461 /* 462 * Allocate a submap for physio 463 */ 464 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 465 VM_PHYS_SIZE, 0, FALSE, NULL); 466 467 /* 468 * No need to allocate an mbuf cluster submap. Mbuf clusters 469 * are allocated via the pool allocator, and we use direct-mapped 470 * pool pages. 471 */ 472 473 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 474 printf("avail memory = %s\n", pbuf); 475 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 476 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 477 478 /* 479 * Set up the buffers. 480 */ 481 bufinit(); 482 483 /* 484 * Set up the board properties database. 485 */ 486 if (!(board_info = propdb_create("board info"))) 487 panic("Cannot create board info database"); 488 489 if (board_info_set("mem-size", &board_data.mem_size, 490 sizeof(&board_data.mem_size), PROP_CONST, 0)) 491 panic("setting mem-size"); 492 if (board_info_set("emac-mac-addr", &board_data.mac_address_local, 493 sizeof(&board_data.mac_address_local), PROP_CONST, 0)) 494 panic("setting emac-mac-addr"); 495 if (board_info_set("sip0-mac-addr", &board_data.mac_address_pci, 496 sizeof(&board_data.mac_address_pci), PROP_CONST, 0)) 497 panic("setting sip0-mac-addr"); 498 if (board_info_set("processor-frequency", &board_data.processor_speed, 499 sizeof(&board_data.processor_speed), PROP_CONST, 0)) 500 panic("setting processor-frequency"); 501 #if NCOM > 0 502 { 503 unsigned int comfreq = COM_FREQ * 6; 504 if (board_info_set("com-opb-frequency", &comfreq, 505 sizeof(&comfreq), 0, 0)) 506 panic("setting com-opb-frequency"); 507 } 508 #endif 509 } 510 511 512 static void 513 dumpsys(void) 514 { 515 516 printf("dumpsys: TBD\n"); 517 } 518 519 /* 520 * Soft networking interrupts. 521 */ 522 void 523 softnet(void) 524 { 525 int isr; 526 527 isr = netisr; 528 netisr = 0; 529 530 #define DONETISR(bit, fn) do { \ 531 if (isr & (1 << bit)) \ 532 fn(); \ 533 } while (0) 534 535 #include <net/netisr_dispatch.h> 536 537 #undef DONETISR 538 539 } 540 541 /* 542 * Soft tty interrupts. 543 */ 544 void 545 softserial(void) 546 { 547 #if NCOM > 0 548 void comsoft(void); /* XXX from dev/ic/com.c */ 549 550 comsoft(); 551 #endif 552 } 553 554 /* 555 * Halt or reboot the machine after syncing/dumping according to howto. 556 */ 557 void 558 cpu_reboot(int howto, char *what) 559 { 560 static int syncing; 561 static char str[256]; 562 char *ap = str, *ap1 = ap; 563 564 boothowto = howto; 565 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 566 syncing = 1; 567 vfs_shutdown(); /* sync */ 568 resettodr(); /* set wall clock */ 569 } 570 571 splhigh(); 572 573 if (!cold && (howto & RB_DUMP)) 574 dumpsys(); 575 576 doshutdownhooks(); 577 578 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 579 /* Power off here if we know how...*/ 580 } 581 582 if (howto & RB_HALT) { 583 printf("halted\n\n"); 584 585 goto reboot; /* XXX for now... */ 586 587 #ifdef DDB 588 printf("dropping to debugger\n"); 589 while(1) 590 Debugger(); 591 #endif 592 } 593 594 printf("rebooting\n\n"); 595 if (what && *what) { 596 if (strlen(what) > sizeof str - 5) 597 printf("boot string too large, ignored\n"); 598 else { 599 strcpy(str, what); 600 ap1 = ap = str + strlen(str); 601 *ap++ = ' '; 602 } 603 } 604 *ap++ = '-'; 605 if (howto & RB_SINGLE) 606 *ap++ = 's'; 607 if (howto & RB_KDB) 608 *ap++ = 'd'; 609 *ap++ = 0; 610 if (ap[-2] == '-') 611 *ap1 = 0; 612 613 /* flush cache for msgbuf */ 614 __syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE)); 615 616 reboot: 617 ppc4xx_reset(); 618 619 printf("ppc4xx_reset() failed!\n"); 620 #ifdef DDB 621 while(1) 622 Debugger(); 623 #else 624 while (1) 625 /* nothing */; 626 #endif 627 } 628 629 int 630 lcsplx(int ipl) 631 { 632 633 return spllower(ipl); /* XXX */ 634 } 635 636 void 637 mem_regions(struct mem_region **mem, struct mem_region **avail) 638 { 639 640 *mem = physmemr; 641 *avail = availmemr; 642 } 643
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