machdep.c revision 1.34
1 /* $NetBSD: machdep.c,v 1.34 1999/03/26 23:41:33 mycroft 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 #include "opt_inet.h" 37 #include "opt_ccitt.h" 38 #include "opt_iso.h" 39 #include "opt_ns.h" 40 #include "opt_sysv.h" 41 #include "ipkdb.h" 42 43 #include <sys/param.h> 44 #include <sys/buf.h> 45 #include <sys/callout.h> 46 #include <sys/exec.h> 47 #include <sys/malloc.h> 48 #include <sys/map.h> 49 #include <sys/mbuf.h> 50 #include <sys/mount.h> 51 #include <sys/msgbuf.h> 52 #include <sys/proc.h> 53 #include <sys/reboot.h> 54 #include <sys/syscallargs.h> 55 #include <sys/syslog.h> 56 #include <sys/systm.h> 57 #include <sys/user.h> 58 59 #include <vm/vm.h> 60 #include <vm/vm_kern.h> 61 62 #include <uvm/uvm_extern.h> 63 64 #include <net/netisr.h> 65 66 #include <machine/bat.h> 67 #include <machine/pmap.h> 68 #include <machine/powerpc.h> 69 #include <machine/trap.h> 70 71 /* 72 * Global variables used here and there 73 */ 74 vm_map_t exec_map = NULL; 75 vm_map_t mb_map = NULL; 76 vm_map_t phys_map = NULL; 77 78 struct pcb *curpcb; 79 struct pmap *curpm; 80 struct proc *fpuproc; 81 82 extern struct user *proc0paddr; 83 84 struct bat battable[16]; 85 86 int astpending; 87 88 char *bootpath; 89 90 #define MSGBUFADDR 0x3000 91 92 caddr_t allocsys __P((caddr_t)); 93 94 static int fake_spl __P((void)); 95 static int fake_splx __P((int)); 96 static void fake_setsoft __P((void)); 97 static void fake_clock_return __P((struct clockframe *, int)); 98 static void fake_irq_establish __P((int, int, void (*)(void *), void *)); 99 100 struct machvec machine_interface = { 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_spl, 110 fake_splx, 111 fake_setsoft, 112 fake_setsoft, 113 fake_clock_return, 114 fake_irq_establish, 115 }; 116 117 int cold = 1; 118 119 void 120 initppc(startkernel, endkernel, args) 121 u_int startkernel, endkernel; 122 char *args; 123 { 124 int phandle, qhandle; 125 char name[32]; 126 struct machvec *mp; 127 extern trapcode, trapsize; 128 extern dsitrap, dsisize; 129 extern isitrap, isisize; 130 extern decrint, decrsize; 131 extern tlbimiss, tlbimsize; 132 extern tlbdlmiss, tlbdlmsize; 133 extern tlbdsmiss, tlbdsmsize; 134 #ifdef DDB 135 extern ddblow, ddbsize; 136 extern void *startsym, *endsym; 137 #endif 138 #if NIPKDB > 0 139 extern ipkdblow, ipkdbsize; 140 #endif 141 extern void consinit __P((void)); 142 extern void callback __P((void *)); 143 int exc, scratch; 144 145 proc0.p_addr = proc0paddr; 146 bzero(proc0.p_addr, sizeof *proc0.p_addr); 147 148 curpcb = &proc0paddr->u_pcb; 149 150 curpm = curpcb->pcb_pmreal = curpcb->pcb_pm = pmap_kernel(); 151 152 /* 153 * i386 port says, that this shouldn't be here, 154 * but I really think the console should be initialized 155 * as early as possible. 156 */ 157 consinit(); 158 159 #ifdef __notyet__ /* Needs some rethinking regarding real/virtual OFW */ 160 OF_set_callback(callback); 161 #endif 162 /* 163 * Initialize BAT registers to unmapped to not generate 164 * overlapping mappings below. 165 */ 166 asm volatile ("mtibatu 0,%0" :: "r"(0)); 167 asm volatile ("mtibatu 1,%0" :: "r"(0)); 168 asm volatile ("mtibatu 2,%0" :: "r"(0)); 169 asm volatile ("mtibatu 3,%0" :: "r"(0)); 170 asm volatile ("mtdbatu 0,%0" :: "r"(0)); 171 asm volatile ("mtdbatu 1,%0" :: "r"(0)); 172 asm volatile ("mtdbatu 2,%0" :: "r"(0)); 173 asm volatile ("mtdbatu 3,%0" :: "r"(0)); 174 175 /* 176 * Set up initial BAT table to only map the lowest 256 MB area 177 */ 178 battable[0].batl = BATL(0x00000000, BAT_M); 179 battable[0].batu = BATU(0x00000000); 180 181 /* 182 * Now setup fixed bat registers 183 * 184 * Note that we still run in real mode, and the BAT 185 * registers were cleared above. 186 */ 187 /* IBAT0 used for initial 256 MB segment */ 188 asm volatile ("mtibatl 0,%0; mtibatu 0,%1" 189 :: "r"(battable[0].batl), "r"(battable[0].batu)); 190 /* DBAT0 used similar */ 191 asm volatile ("mtdbatl 0,%0; mtdbatu 0,%1" 192 :: "r"(battable[0].batl), "r"(battable[0].batu)); 193 194 /* 195 * Set up trap vectors 196 */ 197 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 198 switch (exc) { 199 default: 200 bcopy(&trapcode, (void *)exc, (size_t)&trapsize); 201 break; 202 case EXC_EXI: 203 /* 204 * This one is (potentially) installed during autoconf 205 */ 206 break; 207 case EXC_DSI: 208 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); 209 break; 210 case EXC_ISI: 211 bcopy(&isitrap, (void *)EXC_ISI, (size_t)&isisize); 212 break; 213 case EXC_DECR: 214 bcopy(&decrint, (void *)EXC_DECR, (size_t)&decrsize); 215 break; 216 case EXC_IMISS: 217 bcopy(&tlbimiss, (void *)EXC_IMISS, (size_t)&tlbimsize); 218 break; 219 case EXC_DLMISS: 220 bcopy(&tlbdlmiss, (void *)EXC_DLMISS, (size_t)&tlbdlmsize); 221 break; 222 case EXC_DSMISS: 223 bcopy(&tlbdsmiss, (void *)EXC_DSMISS, (size_t)&tlbdsmsize); 224 break; 225 #if defined(DDB) || NIPKDB > 0 226 case EXC_PGM: 227 case EXC_TRC: 228 case EXC_BPT: 229 #if defined(DDB) 230 bcopy(&ddblow, (void *)exc, (size_t)&ddbsize); 231 #else 232 bcopy(&ipkdblow, (void *)exc, (size_t)&ipkdbsize); 233 #endif 234 break; 235 #endif /* DDB || NIPKDB > 0 */ 236 } 237 238 syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 239 240 /* 241 * Now enable translation (and machine checks/recoverable interrupts). 242 */ 243 asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 244 : "=r"(scratch) : "K"(PSL_IR|PSL_DR|PSL_ME|PSL_RI)); 245 246 /* 247 * Parse arg string. 248 */ 249 bootpath = args; 250 while (*++args && *args != ' '); 251 if (*args) { 252 *args++ = 0; 253 while (*args) { 254 switch (*args++) { 255 case 'a': 256 boothowto |= RB_ASKNAME; 257 break; 258 case 's': 259 boothowto |= RB_SINGLE; 260 break; 261 case 'd': 262 boothowto |= RB_KDB; 263 break; 264 } 265 } 266 } 267 268 #ifdef DDB 269 /* ddb_init((int)(endsym - startsym), startsym, endsym); */ 270 #endif 271 #if NIPKDB > 0 272 /* 273 * Now trap to IPKDB 274 */ 275 ipkdb_init(); 276 if (boothowto & RB_KDB) 277 ipkdb_connect(0); 278 #endif 279 280 /* 281 * Set the page size. 282 */ 283 uvm_setpagesize(); 284 285 /* 286 * Initialize pmap module. 287 */ 288 pmap_bootstrap(startkernel, endkernel); 289 } 290 291 /* 292 * This should probably be in autoconf! XXX 293 */ 294 int cpu; 295 char cpu_model[80]; 296 char machine[] = MACHINE; /* from <machine/param.h> */ 297 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 298 299 void 300 identifycpu() 301 { 302 int phandle, pvr; 303 char name[32]; 304 305 /* 306 * Find cpu type (Do it by OpenFirmware?) 307 */ 308 asm ("mfpvr %0" : "=r"(pvr)); 309 cpu = pvr >> 16; 310 switch (cpu) { 311 case 1: 312 sprintf(cpu_model, "601"); 313 break; 314 case 3: 315 sprintf(cpu_model, "603"); 316 break; 317 case 4: 318 sprintf(cpu_model, "604"); 319 break; 320 case 5: 321 sprintf(cpu_model, "602"); 322 break; 323 case 6: 324 sprintf(cpu_model, "603e"); 325 break; 326 case 7: 327 sprintf(cpu_model, "603ev"); 328 break; 329 case 9: 330 sprintf(cpu_model, "604ev"); 331 break; 332 case 20: 333 sprintf(cpu_model, "620"); 334 break; 335 default: 336 sprintf(cpu_model, "Version %x", cpu); 337 break; 338 } 339 sprintf(cpu_model + strlen(cpu_model), " (Revision %x)", pvr & 0xffff); 340 printf("CPU: %s\n", cpu_model); 341 } 342 343 void 344 install_extint(handler) 345 void (*handler) __P((void)); 346 { 347 extern extint, extsize; 348 extern u_long extint_call; 349 u_long offset = (u_long)handler - (u_long)&extint_call; 350 int omsr, msr; 351 352 #ifdef DIAGNOSTIC 353 if (offset > 0x1ffffff) 354 panic("install_extint: too far away"); 355 #endif 356 asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1" 357 : "=r"(omsr), "=r"(msr) : "K"((u_short)~PSL_EE)); 358 extint_call = (extint_call & 0xfc000003) | offset; 359 bcopy(&extint, (void *)EXC_EXI, (size_t)&extsize); 360 syncicache((void *)&extint_call, sizeof extint_call); 361 syncicache((void *)EXC_EXI, (int)&extsize); 362 asm volatile ("mtmsr %0" :: "r"(omsr)); 363 } 364 365 /* 366 * Machine dependent startup code. 367 */ 368 void 369 cpu_startup() 370 { 371 int sz, i; 372 caddr_t v; 373 paddr_t minaddr, maxaddr; 374 int base, residual; 375 376 /* 377 * Initialize error message buffer (at end of core). 378 */ 379 initmsgbuf((caddr_t)MSGBUFADDR, round_page(MSGBUFSIZE)); 380 381 proc0.p_addr = proc0paddr; 382 v = (caddr_t)proc0paddr + USPACE; 383 384 printf("%s", version); 385 identifycpu(); 386 387 printf("real mem = %d\n", ctob(physmem)); 388 389 /* 390 * Find out how much space we need, allocate it, 391 * and then give everything true virtual addresses. 392 */ 393 sz = (int)allocsys((caddr_t)0); 394 if ((v = (caddr_t)uvm_km_zalloc(kernel_map, round_page(sz))) == 0) 395 panic("startup: no room for tables"); 396 if (allocsys(v) - v != sz) 397 panic("startup: table size inconsistency"); 398 399 /* 400 * Now allocate buffers proper. They are different than the above 401 * in that they usually occupy more virtual memory than physical. 402 */ 403 sz = MAXBSIZE * nbuf; 404 if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(sz), 405 NULL, UVM_UNKNOWN_OFFSET, 406 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 407 UVM_ADV_NORMAL, 0)) != KERN_SUCCESS) 408 panic("startup: cannot allocate VM for buffers"); 409 minaddr = (vaddr_t)buffers; 410 base = bufpages / nbuf; 411 residual = bufpages % nbuf; 412 if (base >= MAXBSIZE) { 413 /* Don't want to alloc more physical mem than ever needed */ 414 base = MAXBSIZE; 415 residual = 0; 416 } 417 for (i = 0; i < nbuf; i++) { 418 vsize_t curbufsize; 419 vaddr_t curbuf; 420 struct vm_page *pg; 421 422 /* 423 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 424 * that MAXBSIZE space, we allocate and map (base+1) pages 425 * for the first "residual" buffers, and then we allocate 426 * "base" pages for the rest. 427 */ 428 curbuf = (vaddr_t) buffers + (i * MAXBSIZE); 429 curbufsize = CLBYTES * ((i < residual) ? (base+1) : base); 430 431 while (curbufsize) { 432 pg = uvm_pagealloc(NULL, 0, NULL); 433 if (pg == NULL) 434 panic("startup: not enough memory for " 435 "buffer cache"); 436 pmap_enter(kernel_map->pmap, curbuf, 437 VM_PAGE_TO_PHYS(pg), VM_PROT_READ|VM_PROT_WRITE, 438 TRUE, VM_PROT_READ|VM_PROT_WRITE); 439 curbuf += PAGE_SIZE; 440 curbufsize -= PAGE_SIZE; 441 } 442 } 443 444 /* 445 * Allocate a submap for exec arguments. This map effectively 446 * limits the number of processes exec'ing at any time. 447 */ 448 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 449 16*NCARGS, TRUE, FALSE, NULL); 450 451 /* 452 * Allocate a submap for physio 453 */ 454 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 455 VM_PHYS_SIZE, TRUE, FALSE, NULL); 456 457 /* 458 * Finally, allocate mbuf cluster submap. 459 */ 460 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 461 VM_MBUF_SIZE, FALSE, FALSE, NULL); 462 463 /* 464 * Initialize callouts. 465 */ 466 callfree = callout; 467 for (i = 1; i < ncallout; i++) 468 callout[i - 1].c_next = &callout[i]; 469 470 printf("avail memory = %d\n", ptoa(uvmexp.free)); 471 printf("using %d buffers containing %d bytes of memory\n", 472 nbuf, bufpages * CLBYTES); 473 474 /* 475 * Set up the buffers. 476 */ 477 bufinit(); 478 479 /* 480 * For now, use soft spl handling. 481 */ 482 { 483 extern struct machvec soft_machvec; 484 485 machine_interface = soft_machvec; 486 } 487 488 /* 489 * Now allow hardware interrupts. 490 */ 491 { 492 int msr; 493 494 splhigh(); 495 asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0" 496 : "=r"(msr) : "K"((u_short)(PSL_EE|PSL_RI))); 497 } 498 499 /* 500 * Configure devices. 501 */ 502 configure(); 503 } 504 505 /* 506 * Allocate space for system data structures. 507 */ 508 caddr_t 509 allocsys(v) 510 caddr_t v; 511 { 512 #define valloc(name, type, num) \ 513 v = (caddr_t)(((name) = (type *)v) + (num)) 514 515 valloc(callout, struct callout, ncallout); 516 #ifdef SYSVSHM 517 valloc(shmsegs, struct shmid_ds, shminfo.shmmni); 518 #endif 519 #ifdef SYSVSEM 520 valloc(sema, struct semid_ds, seminfo.semmni); 521 valloc(sem, struct sem, seminfo.semmns); 522 valloc(semu, int, (seminfo.semmnu * seminfo.semusz) / sizeof (int)); 523 #endif 524 #ifdef SYSVMSG 525 valloc(msgpool, char, msginfo.msgmax); 526 valloc(msgmaps, struct msgmap, msginfo.msgseg); 527 valloc(msghdrs, struct msg, msginfo.msgtql); 528 valloc(msqids, struct msqid_ds, msginfo.msgmni); 529 #endif 530 531 /* 532 * Decide on buffer space to use. 533 */ 534 if (bufpages == 0) 535 bufpages = (physmem / 20) / CLSIZE; 536 if (nbuf == 0) { 537 nbuf = bufpages; 538 if (nbuf < 16) 539 nbuf = 16; 540 } 541 if (nswbuf == 0) { 542 nswbuf = (nbuf / 2) & ~1; 543 if (nswbuf > 256) 544 nswbuf = 256; 545 } 546 valloc(buf, struct buf, nbuf); 547 548 return (v); 549 } 550 551 /* 552 * consinit 553 * Initialize system console. 554 */ 555 void 556 consinit() 557 { 558 static int initted; 559 560 if (initted) 561 return; 562 initted = 1; 563 cninit(); 564 } 565 566 /* 567 * Set set up registers on exec. 568 */ 569 void 570 setregs(p, pack, stack) 571 struct proc *p; 572 struct exec_package *pack; 573 u_long stack; 574 { 575 struct trapframe *tf = trapframe(p); 576 struct ps_strings arginfo; 577 578 bzero(tf, sizeof *tf); 579 tf->fixreg[1] = -roundup(-stack + 8, 16); 580 581 /* 582 * XXX Machine-independent code has already copied arguments and 583 * XXX environment to userland. Get them back here. 584 */ 585 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof (arginfo)); 586 587 /* 588 * Set up arguments for _start(): 589 * _start(argc, argv, envp, obj, cleanup, ps_strings); 590 * 591 * Notes: 592 * - obj and cleanup are the auxilliary and termination 593 * vectors. They are fixed up by ld.elf_so. 594 * - ps_strings is a NetBSD extention, and will be 595 * ignored by executables which are strictly 596 * compliant with the SVR4 ABI. 597 * 598 * XXX We have to set both regs and retval here due to different 599 * XXX calling convention in trap.c and init_main.c. 600 */ 601 tf->fixreg[3] = arginfo.ps_nargvstr; 602 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 603 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 604 tf->fixreg[6] = 0; /* auxillary vector */ 605 tf->fixreg[7] = 0; /* termination vector */ 606 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 607 608 tf->srr0 = pack->ep_entry; 609 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; 610 p->p_addr->u_pcb.pcb_flags = 0; 611 } 612 613 /* 614 * Send a signal to process. 615 */ 616 void 617 sendsig(catcher, sig, mask, code) 618 sig_t catcher; 619 int sig; 620 sigset_t *mask; 621 u_long code; 622 { 623 struct proc *p = curproc; 624 struct trapframe *tf; 625 struct sigframe *fp, frame; 626 struct sigacts *psp = p->p_sigacts; 627 int onstack; 628 629 tf = trapframe(p); 630 631 /* Do we need to jump onto the signal stack? */ 632 onstack = 633 (psp->ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && 634 (psp->ps_sigact[sig].sa_flags & SA_ONSTACK) != 0; 635 636 /* Allocate space for the signal handler context. */ 637 if (onstack) 638 fp = (struct sigframe *)((caddr_t)psp->ps_sigstk.ss_sp + 639 psp->ps_sigstk.ss_size); 640 else 641 fp = (struct sigframe *)tf->fixreg[1]; 642 fp = (struct sigframe *)((int)(fp - 1) & ~0xf); 643 644 /* Build stack frame for signal trampoline. */ 645 frame.sf_signum = sig; 646 frame.sf_code = code; 647 648 /* Save register context. */ 649 bcopy(tf, &frame.sf_sc.sc_frame, sizeof *tf); 650 651 /* Save signal stack. */ 652 frame.sf_sc.sc_onstack = psp->ps_sigstk.ss_flags & SS_ONSTACK; 653 654 /* Save signal mask. */ 655 frame.sf_sc.sc_mask = *mask; 656 657 #ifdef COMPAT_13 658 /* 659 * XXX We always have to save an old style signal mask because 660 * XXX we might be delivering a signal to a process which will 661 * XXX escape from the signal in a non-standard way and invoke 662 * XXX sigreturn() directly. 663 */ 664 native_sigset_to_sigset13(mask, &frame.sf_sc.__sc_mask13); 665 #endif 666 667 if (copyout(&frame, fp, sizeof frame) != 0) { 668 /* 669 * Process has trashed its stack; give it an illegal 670 * instructoin to halt it in its tracks. 671 */ 672 sigexit(p, SIGILL); 673 /* NOTREACHED */ 674 } 675 676 /* 677 * Build context to run handler in. 678 */ 679 tf->fixreg[1] = (int)fp; 680 tf->lr = (int)catcher; 681 tf->fixreg[3] = (int)sig; 682 tf->fixreg[4] = (int)code; 683 tf->fixreg[5] = (int)&frame.sf_sc; 684 tf->srr0 = (int)psp->ps_sigcode; 685 686 /* Remember that we're now on the signal stack. */ 687 if (onstack) 688 psp->ps_sigstk.ss_flags |= SS_ONSTACK; 689 } 690 691 /* 692 * System call to cleanup state after a signal handler returns. 693 */ 694 int 695 sys___sigreturn14(p, v, retval) 696 struct proc *p; 697 void *v; 698 register_t *retval; 699 { 700 struct sys___sigreturn14_args /* { 701 syscallarg(struct sigcontext *) sigcntxp; 702 } */ *uap = v; 703 struct sigcontext sc; 704 struct trapframe *tf; 705 int error; 706 707 /* 708 * The trampoline hands us the context. 709 * It is unsafe to keep track of it ourselves, in the event that a 710 * program jumps out of a signal hander. 711 */ 712 if ((error = copyin(SCARG(uap, sigcntxp), &sc, sizeof sc)) != 0) 713 return (error); 714 715 /* Restore the register context. */ 716 tf = trapframe(p); 717 if ((sc.sc_frame.srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) 718 return (EINVAL); 719 bcopy(&sc.sc_frame, tf, sizeof *tf); 720 721 /* Restore signal stack. */ 722 if (sc.sc_onstack & SS_ONSTACK) 723 p->p_sigacts->ps_sigstk.ss_flags |= SS_ONSTACK; 724 else 725 p->p_sigacts->ps_sigstk.ss_flags &= ~SS_ONSTACK; 726 727 /* Restore signal mask. */ 728 (void) sigprocmask1(p, SIG_SETMASK, &sc.sc_mask, 0); 729 730 return (EJUSTRETURN); 731 } 732 733 /* 734 * Machine dependent system variables. 735 * None for now. 736 */ 737 int 738 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 739 int *name; 740 u_int namelen; 741 void *oldp; 742 size_t *oldlenp; 743 void *newp; 744 size_t newlen; 745 struct proc *p; 746 { 747 /* all sysctl names at this level are terminal */ 748 if (namelen != 1) 749 return (ENOTDIR); 750 switch (name[0]) { 751 default: 752 return (EOPNOTSUPP); 753 } 754 } 755 756 /* 757 * Crash dump handling. 758 */ 759 u_long dumpmag = 0x8fca0101; /* magic number */ 760 int dumpsize = 0; /* size of dump in pages */ 761 long dumplo = -1; /* blocks */ 762 763 void 764 dumpsys() 765 { 766 printf("dumpsys: TBD\n"); 767 } 768 769 /* 770 * Soft networking interrupts. 771 */ 772 void 773 softnet() 774 { 775 int isr = netisr; 776 777 netisr = 0; 778 #ifdef INET 779 #include "arp.h" 780 #if NARP > 0 781 if (isr & (1 << NETISR_ARP)) 782 arpintr(); 783 #endif 784 if (isr & (1 << NETISR_IP)) 785 ipintr(); 786 #endif 787 #ifdef IMP 788 if (isr & (1 << NETISR_IMP)) 789 impintr(); 790 #endif 791 #ifdef NS 792 if (isr & (1 << NETISR_NS)) 793 nsintr(); 794 #endif 795 #ifdef ISO 796 if (isr & (1 << NETISR_ISO)) 797 clnlintr(); 798 #endif 799 #ifdef CCITT 800 if (isr & (1 << NETISR_CCITT)) 801 ccittintr(); 802 #endif 803 #include "ppp.h" 804 #if NPPP > 0 805 if (isr & (1 << NETISR_PPP)) 806 pppintr(); 807 #endif 808 } 809 810 /* 811 * Stray interrupts. 812 */ 813 void 814 strayintr(irq) 815 int irq; 816 { 817 log(LOG_ERR, "stray interrupt %d\n", irq); 818 } 819 820 /* 821 * Halt or reboot the machine after syncing/dumping according to howto. 822 */ 823 void 824 cpu_reboot(howto, what) 825 int howto; 826 char *what; 827 { 828 static int syncing; 829 static char str[256]; 830 char *ap = str, *ap1 = ap; 831 832 boothowto = howto; 833 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 834 syncing = 1; 835 vfs_shutdown(); /* sync */ 836 resettodr(); /* set wall clock */ 837 } 838 splhigh(); 839 if (howto & RB_HALT) { 840 doshutdownhooks(); 841 printf("halted\n\n"); 842 ppc_exit(); 843 } 844 if (!cold && (howto & RB_DUMP)) 845 dumpsys(); 846 doshutdownhooks(); 847 printf("rebooting\n\n"); 848 if (what && *what) { 849 if (strlen(what) > sizeof str - 5) 850 printf("boot string too large, ignored\n"); 851 else { 852 strcpy(str, what); 853 ap1 = ap = str + strlen(str); 854 *ap++ = ' '; 855 } 856 } 857 *ap++ = '-'; 858 if (howto & RB_SINGLE) 859 *ap++ = 's'; 860 if (howto & RB_KDB) 861 *ap++ = 'd'; 862 *ap++ = 0; 863 if (ap[-2] == '-') 864 *ap1 = 0; 865 ppc_boot(str); 866 } 867 868 /* 869 * OpenFirmware callback routine 870 */ 871 void 872 callback(p) 873 void *p; 874 { 875 panic("callback"); /* for now XXX */ 876 } 877 878 /* 879 * Initial Machine Interface. 880 */ 881 static int 882 fake_spl() 883 { 884 int scratch; 885 886 asm volatile ("mfmsr %0; andi. %0,%0,%1; mtmsr %0; isync" 887 : "=r"(scratch) : "K"((u_short)~(PSL_EE|PSL_ME))); 888 return (-1); 889 } 890 891 static void 892 fake_setsoft() 893 { 894 /* Do nothing */ 895 } 896 897 static int 898 fake_splx(new) 899 int new; 900 { 901 return (fake_spl()); 902 } 903 904 static void 905 fake_clock_return(frame, nticks) 906 struct clockframe *frame; 907 int nticks; 908 { 909 /* Do nothing */ 910 } 911 912 static void 913 fake_irq_establish(irq, level, handler, arg) 914 int irq, level; 915 void (*handler) __P((void *)); 916 void *arg; 917 { 918 panic("fake_irq_establish"); 919 } 920
Indexes created Wed Oct 15 16:09:53 GMT 2025