machdep.c revision 1.70
1 /* $NetBSD: machdep.c,v 1.70 2001/10/22 16:44:03 thorpej Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include "opt_compat_netbsd.h" 35 #include "opt_ddb.h" 36 37 #include <sys/param.h> 38 #include <sys/buf.h> 39 #include <sys/exec.h> 40 #include <sys/malloc.h> 41 #include <sys/map.h> 42 #include <sys/mbuf.h> 43 #include <sys/mount.h> 44 #include <sys/msgbuf.h> 45 #include <sys/proc.h> 46 #include <sys/reboot.h> 47 #include <sys/syscallargs.h> 48 #include <sys/syslog.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/user.h> 52 #include <sys/boot_flag.h> 53 54 #include <uvm/uvm_extern.h> 55 56 #include <net/netisr.h> 57 58 #include <dev/ofw/openfirm.h> 59 60 #include <machine/autoconf.h> 61 #include <machine/bat.h> 62 #include <machine/pmap.h> 63 #include <machine/powerpc.h> 64 #include <machine/trap.h> 65 66 #include <dev/cons.h> 67 68 /* 69 * Global variables used here and there 70 */ 71 struct vm_map *exec_map = NULL; 72 struct vm_map *mb_map = NULL; 73 struct vm_map *phys_map = NULL; 74 75 struct pcb *curpcb; 76 struct pmap *curpm; 77 struct proc *fpuproc; 78 79 extern struct user *proc0paddr; 80 81 struct bat battable[16]; 82 83 int astpending; 84 85 char *bootpath; 86 87 paddr_t msgbuf_paddr; 88 vaddr_t msgbuf_vaddr; 89 90 int lcsplx(int); /* called from locore.S */ 91 92 static int fake_spl __P((void)); 93 static int fake_splx __P((int)); 94 static void fake_setsoft __P((void)); 95 static void fake_clock_return __P((struct clockframe *, int)); 96 static void fake_irq_establish __P((int, int, void (*)(void *), void *)); 97 98 struct machvec machine_interface = { 99 fake_spl, 100 fake_spl, 101 fake_spl, 102 fake_spl, 103 fake_spl, 104 fake_spl, 105 fake_spl, 106 fake_spl, 107 fake_spl, 108 fake_spl, 109 fake_splx, 110 fake_setsoft, 111 fake_setsoft, 112 fake_clock_return, 113 fake_irq_establish, 114 }; 115 116 char platform_name[64]; 117 118 void 119 initppc(startkernel, endkernel, args) 120 u_int startkernel, endkernel; 121 char *args; 122 { 123 extern int trapcode, trapsize; 124 extern int alitrap, alisize; 125 extern int dsitrap, dsisize; 126 extern int isitrap, isisize; 127 extern int decrint, decrsize; 128 extern int tlbimiss, tlbimsize; 129 extern int tlbdlmiss, tlbdlmsize; 130 extern int tlbdsmiss, tlbdsmsize; 131 #ifdef DDB 132 extern int ddblow, ddbsize; 133 /* extern void *startsym, *endsym; */ 134 #endif 135 #ifdef IPKDB 136 extern int ipkdblow, ipkdbsize; 137 #endif 138 int exc, scratch, node; 139 140 proc0.p_addr = proc0paddr; 141 memset(proc0.p_addr, 0, sizeof *proc0.p_addr); 142 143 curpcb = &proc0paddr->u_pcb; 144 145 curpm = curpcb->pcb_pmreal = curpcb->pcb_pm = pmap_kernel(); 146 147 /* 148 * Fetch the platform name from the root of the OFW tree. 149 */ 150 node = OF_peer(0); 151 OF_getprop(node, "name", platform_name, sizeof(platform_name)); 152 153 /* 154 * i386 port says, that this shouldn't be here, 155 * but I really think the console should be initialized 156 * as early as possible. 157 */ 158 consinit(); 159 160 #ifdef __notyet__ /* Needs some rethinking regarding real/virtual OFW */ 161 OF_set_callback(callback); 162 #endif 163 /* 164 * Initialize BAT registers to unmapped to not generate 165 * overlapping mappings below. 166 */ 167 asm volatile ("mtibatu 0,%0" :: "r"(0)); 168 asm volatile ("mtibatu 1,%0" :: "r"(0)); 169 asm volatile ("mtibatu 2,%0" :: "r"(0)); 170 asm volatile ("mtibatu 3,%0" :: "r"(0)); 171 asm volatile ("mtdbatu 0,%0" :: "r"(0)); 172 asm volatile ("mtdbatu 1,%0" :: "r"(0)); 173 asm volatile ("mtdbatu 2,%0" :: "r"(0)); 174 asm volatile ("mtdbatu 3,%0" :: "r"(0)); 175 176 /* 177 * Set up initial BAT table to only map the lowest 256 MB area 178 */ 179 battable[0].batl = BATL(0x00000000, BAT_M, BAT_PP_RW); 180 battable[0].batu = BATU(0x00000000, BAT_BL_256M, BAT_Vs); 181 182 /* 183 * Now setup fixed bat registers 184 * 185 * Note that we still run in real mode, and the BAT 186 * registers were cleared above. 187 */ 188 /* IBAT0 used for initial 256 MB segment */ 189 asm volatile ("mtibatl 0,%0; mtibatu 0,%1" 190 :: "r"(battable[0].batl), "r"(battable[0].batu)); 191 /* DBAT0 used similar */ 192 asm volatile ("mtdbatl 0,%0; mtdbatu 0,%1" 193 :: "r"(battable[0].batl), "r"(battable[0].batu)); 194 195 /* 196 * Set up trap vectors 197 */ 198 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 199 switch (exc) { 200 default: 201 memcpy((void *)exc, &trapcode, (size_t)&trapsize); 202 break; 203 case EXC_EXI: 204 /* 205 * This one is (potentially) installed during autoconf 206 */ 207 break; 208 case EXC_ALI: 209 memcpy((void *)EXC_ALI, &alitrap, (size_t)&alisize); 210 break; 211 case EXC_DSI: 212 memcpy((void *)EXC_DSI, &dsitrap, (size_t)&dsisize); 213 break; 214 case EXC_ISI: 215 memcpy((void *)EXC_ISI, &isitrap, (size_t)&isisize); 216 break; 217 case EXC_DECR: 218 memcpy((void *)EXC_DECR, &decrint, (size_t)&decrsize); 219 break; 220 case EXC_IMISS: 221 memcpy((void *)EXC_IMISS, &tlbimiss, (size_t)&tlbimsize); 222 break; 223 case EXC_DLMISS: 224 memcpy((void *)EXC_DLMISS, &tlbdlmiss, (size_t)&tlbdlmsize); 225 break; 226 case EXC_DSMISS: 227 memcpy((void *)EXC_DSMISS, &tlbdsmiss, (size_t)&tlbdsmsize); 228 break; 229 #if defined(DDB) || defined(IPKDB) 230 case EXC_PGM: 231 case EXC_TRC: 232 case EXC_BPT: 233 #if defined(DDB) 234 memcpy((void *)exc, &ddblow, (size_t)&ddbsize); 235 #else 236 memcpy((void *)exc, &ipkdblow, (size_t)&ipkdbsize); 237 #endif 238 break; 239 #endif /* DDB || IPKDB */ 240 } 241 242 __syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 243 244 /* 245 * Now enable translation (and machine checks/recoverable interrupts). 246 */ 247 asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 248 : "=r"(scratch) : "K"(PSL_IR|PSL_DR|PSL_ME|PSL_RI)); 249 250 /* 251 * Parse arg string. 252 */ 253 bootpath = args; 254 while (*++args && *args != ' '); 255 if (*args) { 256 for(*args++ = 0; *args; args++) 257 BOOT_FLAG(*args, boothowto); 258 } 259 260 #ifdef DDB 261 /* ddb_init((int)(endsym - startsym), startsym, endsym); */ 262 #endif 263 #ifdef IPKDB 264 /* 265 * Now trap to IPKDB 266 */ 267 ipkdb_init(); 268 if (boothowto & RB_KDB) 269 ipkdb_connect(0); 270 #endif 271 272 /* 273 * Set the page size. 274 */ 275 uvm_setpagesize(); 276 277 /* 278 * Initialize pmap module. 279 */ 280 pmap_bootstrap(startkernel, endkernel); 281 } 282 283 /* 284 * This should probably be in autoconf! XXX 285 */ 286 int cpu; 287 char machine[] = MACHINE; /* from <machine/param.h> */ 288 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 289 290 void 291 install_extint(handler) 292 void (*handler) __P((void)); 293 { 294 extern int extint, extsize; 295 extern u_long extint_call; 296 u_long offset = (u_long)handler - (u_long)&extint_call; 297 int omsr, msr; 298 299 #ifdef DIAGNOSTIC 300 if (offset > 0x1ffffff) 301 panic("install_extint: too far away"); 302 #endif 303 asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1" 304 : "=r"(omsr), "=r"(msr) : "K"((u_short)~PSL_EE)); 305 extint_call = (extint_call & 0xfc000003) | offset; 306 memcpy((void *)EXC_EXI, &extint, (size_t)&extsize); 307 __syncicache((void *)&extint_call, sizeof extint_call); 308 __syncicache((void *)EXC_EXI, (int)&extsize); 309 asm volatile ("mtmsr %0" :: "r"(omsr)); 310 } 311 312 /* 313 * Machine dependent startup code. 314 */ 315 void 316 cpu_startup() 317 { 318 int sz, i; 319 caddr_t v; 320 paddr_t minaddr, maxaddr; 321 int base, residual; 322 char pbuf[9]; 323 324 proc0.p_addr = proc0paddr; 325 v = (caddr_t)proc0paddr + USPACE; 326 327 /* 328 * Initialize error message buffer (at end of core). 329 */ 330 if (!(msgbuf_vaddr = uvm_km_alloc(kernel_map, round_page(MSGBUFSIZE)))) 331 panic("startup: no room for message buffer"); 332 for (i = 0; i < btoc(MSGBUFSIZE); i++) 333 pmap_enter(pmap_kernel(), msgbuf_vaddr + i * NBPG, 334 msgbuf_paddr + i * NBPG, VM_PROT_READ|VM_PROT_WRITE, 335 VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED); 336 pmap_update(pmap_kernel()); 337 initmsgbuf((caddr_t)msgbuf_vaddr, round_page(MSGBUFSIZE)); 338 339 printf("%s", version); 340 cpu_identify(NULL, 0); 341 342 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 343 printf("total memory = %s\n", pbuf); 344 345 /* 346 * Find out how much space we need, allocate it, 347 * and then give everything true virtual addresses. 348 */ 349 sz = (int)allocsys(NULL, NULL); 350 if ((v = (caddr_t)uvm_km_zalloc(kernel_map, round_page(sz))) == 0) 351 panic("startup: no room for tables"); 352 if (allocsys(v, NULL) - v != sz) 353 panic("startup: table size inconsistency"); 354 355 /* 356 * Now allocate buffers proper. They are different than the above 357 * in that they usually occupy more virtual memory than physical. 358 */ 359 sz = MAXBSIZE * nbuf; 360 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(sz), 361 NULL, UVM_UNKNOWN_OFFSET, 0, 362 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 363 UVM_ADV_NORMAL, 0)) != 0) 364 panic("startup: cannot allocate VM for buffers"); 365 minaddr = (vaddr_t)buffers; 366 base = bufpages / nbuf; 367 residual = bufpages % nbuf; 368 if (base >= MAXBSIZE) { 369 /* Don't want to alloc more physical mem than ever needed */ 370 base = MAXBSIZE; 371 residual = 0; 372 } 373 for (i = 0; i < nbuf; i++) { 374 vsize_t curbufsize; 375 vaddr_t curbuf; 376 struct vm_page *pg; 377 378 /* 379 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 380 * that MAXBSIZE space, we allocate and map (base+1) pages 381 * for the first "residual" buffers, and then we allocate 382 * "base" pages for the rest. 383 */ 384 curbuf = (vaddr_t) buffers + (i * MAXBSIZE); 385 curbufsize = NBPG * ((i < residual) ? (base+1) : base); 386 387 while (curbufsize) { 388 pg = uvm_pagealloc(NULL, 0, NULL, 0); 389 if (pg == NULL) 390 panic("startup: not enough memory for " 391 "buffer cache"); 392 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 393 VM_PROT_READ | VM_PROT_WRITE); 394 curbuf += PAGE_SIZE; 395 curbufsize -= PAGE_SIZE; 396 } 397 } 398 pmap_update(kernel_map->pmap); 399 400 /* 401 * Allocate a submap for exec arguments. This map effectively 402 * limits the number of processes exec'ing at any time. 403 */ 404 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 405 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 406 407 /* 408 * Allocate a submap for physio 409 */ 410 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 411 VM_PHYS_SIZE, 0, FALSE, NULL); 412 413 /* 414 * No need to allocate an mbuf cluster submap. Mbuf clusters 415 * are allocated via the pool allocator, and we use direct-mapped 416 * pool pages. 417 */ 418 419 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 420 printf("avail memory = %s\n", pbuf); 421 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 422 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 423 424 /* 425 * Set up the buffers. 426 */ 427 bufinit(); 428 429 /* 430 * For now, use soft spl handling. 431 */ 432 { 433 extern struct machvec soft_machvec; 434 435 machine_interface = soft_machvec; 436 } 437 438 /* 439 * Now allow hardware interrupts. 440 */ 441 { 442 int msr; 443 444 splhigh(); 445 asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0" 446 : "=r"(msr) : "K"((u_short)(PSL_EE|PSL_RI))); 447 } 448 } 449 450 /* 451 * consinit 452 * Initialize system console. 453 */ 454 void 455 consinit() 456 { 457 static int initted; 458 459 if (initted) 460 return; 461 initted = 1; 462 cninit(); 463 } 464 465 /* 466 * Crash dump handling. 467 */ 468 469 void 470 dumpsys() 471 { 472 printf("dumpsys: TBD\n"); 473 } 474 475 /* 476 * Soft networking interrupts. 477 */ 478 void 479 softnet() 480 { 481 int isr = netisr; 482 483 netisr = 0; 484 485 #define DONETISR(bit, fn) do { \ 486 if (isr & (1 << bit)) \ 487 fn(); \ 488 } while (0) 489 490 #include <net/netisr_dispatch.h> 491 492 #undef DONETISR 493 } 494 495 /* 496 * Stray interrupts. 497 */ 498 void 499 strayintr(irq) 500 int irq; 501 { 502 log(LOG_ERR, "stray interrupt %d\n", irq); 503 } 504 505 /* 506 * Halt or reboot the machine after syncing/dumping according to howto. 507 */ 508 void 509 cpu_reboot(howto, what) 510 int howto; 511 char *what; 512 { 513 static int syncing; 514 static char str[256]; 515 char *ap = str, *ap1 = ap; 516 517 boothowto = howto; 518 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 519 syncing = 1; 520 vfs_shutdown(); /* sync */ 521 resettodr(); /* set wall clock */ 522 } 523 splhigh(); 524 if (howto & RB_HALT) { 525 doshutdownhooks(); 526 printf("halted\n\n"); 527 ppc_exit(); 528 } 529 if (!cold && (howto & RB_DUMP)) 530 dumpsys(); 531 doshutdownhooks(); 532 printf("rebooting\n\n"); 533 if (what && *what) { 534 if (strlen(what) > sizeof str - 5) 535 printf("boot string too large, ignored\n"); 536 else { 537 strcpy(str, what); 538 ap1 = ap = str + strlen(str); 539 *ap++ = ' '; 540 } 541 } 542 *ap++ = '-'; 543 if (howto & RB_SINGLE) 544 *ap++ = 's'; 545 if (howto & RB_KDB) 546 *ap++ = 'd'; 547 *ap++ = 0; 548 if (ap[-2] == '-') 549 *ap1 = 0; 550 ppc_boot(str); 551 } 552 553 #ifdef notyet 554 /* 555 * OpenFirmware callback routine 556 */ 557 void 558 callback(p) 559 void *p; 560 { 561 panic("callback"); /* for now XXX */ 562 } 563 #endif 564 565 /* 566 * Perform an `splx()' for locore. 567 */ 568 int 569 lcsplx(int ipl) 570 { 571 572 return (splx(ipl)); 573 } 574 575 /* 576 * Initial Machine Interface. 577 */ 578 static int 579 fake_spl() 580 { 581 int scratch; 582 583 asm volatile ("mfmsr %0; andi. %0,%0,%1; mtmsr %0; isync" 584 : "=r"(scratch) : "K"((u_short)~(PSL_EE|PSL_ME))); 585 return (-1); 586 } 587 588 static void 589 fake_setsoft() 590 { 591 /* Do nothing */ 592 } 593 594 static int 595 fake_splx(new) 596 int new; 597 { 598 return (fake_spl()); 599 } 600 601 static void 602 fake_clock_return(frame, nticks) 603 struct clockframe *frame; 604 int nticks; 605 { 606 /* Do nothing */ 607 } 608 609 static void 610 fake_irq_establish(irq, level, handler, arg) 611 int irq, level; 612 void (*handler) __P((void *)); 613 void *arg; 614 { 615 panic("fake_irq_establish"); 616 } 617
Indexes created Fri Oct 03 02:09:57 GMT 2025