machdep.c revision 1.3
1 /* $NetBSD: machdep.c,v 1.3 1996/10/13 03:31:36 christos 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 #include "kgdb.h" 34 35 #include <sys/param.h> 36 #include <sys/buf.h> 37 #include <sys/callout.h> 38 #include <sys/exec.h> 39 #include <sys/malloc.h> 40 #include <sys/map.h> 41 #include <sys/mbuf.h> 42 #include <sys/mount.h> 43 #include <sys/msgbuf.h> 44 #include <sys/proc.h> 45 #include <sys/reboot.h> 46 #include <sys/syscallargs.h> 47 #include <sys/syslog.h> 48 #include <sys/systm.h> 49 #include <sys/user.h> 50 51 #include <vm/vm.h> 52 #include <vm/vm_kern.h> 53 54 #include <net/netisr.h> 55 56 #include <machine/bat.h> 57 #include <machine/pmap.h> 58 #include <machine/powerpc.h> 59 #include <machine/trap.h> 60 61 /* 62 * Global variables used here and there 63 */ 64 struct pcb *curpcb; 65 struct pmap *curpm; 66 struct proc *fpuproc; 67 68 extern struct user *proc0paddr; 69 70 struct bat battable[16]; 71 72 int astpending; 73 74 char *bootpath; 75 76 /* 77 * We use the page just above the interrupt vector as message buffer 78 */ 79 struct msgbuf *msgbufp = (struct msgbuf *)0x3000; 80 int msgbufmapped = 1; /* message buffer is always mapped */ 81 82 caddr_t allocsys __P((caddr_t)); 83 84 static void fake_splx __P((int)); 85 static void fake_irq_establish __P((int, int, void (*)(void *), void *)); 86 87 struct machvec machine_interface = { 88 fake_splx, 89 fake_irq_establish, 90 }; 91 92 int cold = 1; 93 94 void 95 initppc(startkernel, endkernel, args) 96 u_int startkernel, endkernel; 97 char *args; 98 { 99 int phandle, qhandle; 100 char name[32]; 101 struct machvec *mp; 102 extern trapcode, trapsize; 103 extern dsitrap, dsisize; 104 extern isitrap, isisize; 105 extern decrint, decrsize; 106 extern tlbimiss, tlbimsize; 107 extern tlbdlmiss, tlbdlmsize; 108 extern tlbdsmiss, tlbdsmsize; 109 #if NKGDB > 0 110 extern kgdblow, kgdbsize; 111 #endif 112 extern void consinit __P((void)); 113 extern void callback __P((void *)); 114 int exc, scratch; 115 116 proc0.p_addr = proc0paddr; 117 bzero(proc0.p_addr, sizeof *proc0.p_addr); 118 119 curpcb = &proc0paddr->u_pcb; 120 121 curpm = curpcb->pcb_pmreal = curpcb->pcb_pm = pmap_kernel(); 122 123 /* 124 * i386 port says, that this shouldn't be here, 125 * but I really think the console should be initialized 126 * as early as possible. 127 */ 128 consinit(); 129 130 #ifdef __notyet__ /* Needs some rethinking regarding real/virtual OFW */ 131 OF_set_callback(callback); 132 #endif 133 /* 134 * Initialize BAT registers to unmapped to not generate 135 * overlapping mappings below. 136 */ 137 asm volatile ("mtibatu 0,%0" :: "r"(0)); 138 asm volatile ("mtibatu 1,%0" :: "r"(0)); 139 asm volatile ("mtibatu 2,%0" :: "r"(0)); 140 asm volatile ("mtibatu 3,%0" :: "r"(0)); 141 asm volatile ("mtdbatu 0,%0" :: "r"(0)); 142 asm volatile ("mtdbatu 1,%0" :: "r"(0)); 143 asm volatile ("mtdbatu 2,%0" :: "r"(0)); 144 asm volatile ("mtdbatu 3,%0" :: "r"(0)); 145 146 /* 147 * Set up initial BAT table to only map the lowest 256 MB area 148 */ 149 battable[0].batl = BATL(0x00000000, BAT_M); 150 battable[0].batu = BATU(0x00000000); 151 152 /* 153 * Now setup fixed bat registers 154 * 155 * Note that we still run in real mode, and the BAT 156 * registers were cleared above. 157 */ 158 /* IBAT0 used for initial 256 MB segment */ 159 asm volatile ("mtibatl 0,%0; mtibatu 0,%1" 160 :: "r"(battable[0].batl), "r"(battable[0].batu)); 161 /* DBAT0 used similar */ 162 asm volatile ("mtdbatl 0,%0; mtdbatu 0,%1" 163 :: "r"(battable[0].batl), "r"(battable[0].batu)); 164 165 /* 166 * Set up trap vectors 167 */ 168 for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) 169 switch (exc) { 170 default: 171 bcopy(&trapcode, (void *)exc, (size_t)&trapsize); 172 break; 173 case EXC_EXI: 174 /* 175 * This one is (potentially) installed during autoconf 176 */ 177 break; 178 case EXC_DSI: 179 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); 180 break; 181 case EXC_ISI: 182 bcopy(&isitrap, (void *)EXC_ISI, (size_t)&isisize); 183 break; 184 case EXC_DECR: 185 bcopy(&decrint, (void *)EXC_DECR, (size_t)&decrsize); 186 break; 187 case EXC_IMISS: 188 bcopy(&tlbimiss, (void *)EXC_IMISS, (size_t)&tlbimsize); 189 break; 190 case EXC_DLMISS: 191 bcopy(&tlbdlmiss, (void *)EXC_DLMISS, (size_t)&tlbdlmsize); 192 break; 193 case EXC_DSMISS: 194 bcopy(&tlbdsmiss, (void *)EXC_DSMISS, (size_t)&tlbdsmsize); 195 break; 196 #if NKGDB > 0 197 case EXC_PGM: 198 case EXC_TRC: 199 case EXC_BPT: 200 bcopy(&kgdblow, (void *)exc, (size_t)&kgdbsize); 201 break; 202 #endif 203 } 204 205 syncicache((void *)EXC_RST, EXC_LAST - EXC_RST + 0x100); 206 207 /* 208 * Now enable translation (and machine checks/recoverable interrupts). 209 */ 210 asm volatile ("mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 211 : "=r"(scratch) : "K"(PSL_IR|PSL_DR|PSL_ME|PSL_RI)); 212 213 /* 214 * Parse arg string. 215 */ 216 bootpath = args; 217 while ( *++args && *args != ' '); 218 if (*args) { 219 *args++ = 0; 220 while (*args) { 221 switch (*args++) { 222 case 'a': 223 boothowto |= RB_ASKNAME; 224 break; 225 case 's': 226 boothowto |= RB_SINGLE; 227 break; 228 case 'd': 229 boothowto |= RB_KDB; 230 break; 231 } 232 } 233 } 234 235 #if NKGDB > 0 236 /* 237 * Now trap to KGDB 238 */ 239 kgdb_init(); 240 if (boothowto & RB_KDB) 241 kgdb_connect(0); 242 #endif 243 244 /* 245 * Initialize pmap module. 246 */ 247 pmap_bootstrap(startkernel, endkernel); 248 } 249 250 /* 251 * This should probably be in autoconf! XXX 252 */ 253 int cpu; 254 char cpu_model[80]; 255 char machine[] = "PowerPC"; /* cpu architecture */ 256 257 void 258 identifycpu() 259 { 260 int phandle, pvr; 261 char name[32]; 262 263 /* 264 * Find cpu type (Do it by OpenFirmware?) 265 */ 266 asm ("mfpvr %0" : "=r"(pvr)); 267 cpu = pvr >> 16; 268 switch (cpu) { 269 case 1: 270 sprintf(cpu_model, "601"); 271 break; 272 case 3: 273 sprintf(cpu_model, "603"); 274 break; 275 case 4: 276 sprintf(cpu_model, "604"); 277 break; 278 case 5: 279 sprintf(cpu_model, "602"); 280 break; 281 case 6: 282 sprintf(cpu_model, "603e"); 283 break; 284 case 7: 285 sprintf(cpu_model, "603ev"); 286 break; 287 case 9: 288 sprintf(cpu_model, "604ev"); 289 break; 290 case 20: 291 sprintf(cpu_model, "620"); 292 break; 293 default: 294 sprintf(cpu_model, "Version %x", cpu); 295 break; 296 } 297 sprintf(cpu_model + strlen(cpu_model), " (Revision %x)", pvr & 0xffff); 298 printf("CPU: %s\n", cpu_model); 299 } 300 301 void 302 install_extint(handler) 303 void (*handler) __P((void)); 304 { 305 extern extint, extsize; 306 extern u_long extint_call; 307 u_long offset = (u_long)handler - (u_long)&extint_call; 308 int omsr, msr; 309 310 #ifdef DIAGNOSTIC 311 if (offset > 0x1ffffff) 312 panic("install_extint: too far away"); 313 #endif 314 asm volatile ("mfmsr %0; andi. %1, %0, %2; mtmsr %1" 315 : "=r"(omsr), "=r"(msr) : "K"((u_short)~PSL_EE)); 316 extint_call = (extint_call & 0xfc000003) | offset; 317 bcopy(&extint, (void *)EXC_EXI, (size_t)&extsize); 318 syncicache((void *)&extint_call, sizeof extint_call); 319 syncicache((void *)EXC_EXI, (int)&extsize); 320 asm volatile ("mtmsr %0" :: "r"(omsr)); 321 } 322 323 /* 324 * Machine dependent startup code. 325 */ 326 void 327 cpu_startup() 328 { 329 int sz, i; 330 caddr_t v; 331 vm_offset_t minaddr, maxaddr; 332 int base, residual; 333 334 proc0.p_addr = proc0paddr; 335 v = (caddr_t)proc0paddr + USPACE; 336 337 printf("%s", version); 338 identifycpu(); 339 340 printf("real mem = %d\n", ctob(physmem)); 341 342 /* 343 * Find out how much space we need, allocate it, 344 * and then give everything true virtual addresses. 345 */ 346 sz = (int)allocsys((caddr_t)0); 347 if ((v = (caddr_t)kmem_alloc(kernel_map, round_page(sz))) == 0) 348 panic("startup: no room for tables"); 349 if (allocsys(v) - v != sz) 350 panic("startup: table size inconsistency"); 351 352 /* 353 * Now allocate buffers proper. They are different than the above 354 * in that they usually occupy more virtual memory than physical. 355 */ 356 sz = MAXBSIZE * nbuf; 357 buffer_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, sz, TRUE); 358 buffers = (char *)minaddr; 359 if (vm_map_find(buffer_map, vm_object_allocate(sz), (vm_offset_t)0, 360 &minaddr, sz, FALSE) != KERN_SUCCESS) 361 panic("startup: cannot allocate buffers"); 362 base = bufpages / nbuf; 363 residual = bufpages % nbuf; 364 if (base >= MAXBSIZE) { 365 /* Don't want to alloc more physical mem than ever needed */ 366 base = MAXBSIZE; 367 residual = 0; 368 } 369 for (i = 0; i < nbuf; i++) { 370 vm_size_t curbufsize; 371 vm_offset_t curbuf; 372 373 curbuf = (vm_offset_t)buffers + i * MAXBSIZE; 374 curbufsize = CLBYTES * (i < residual ? base + 1 : base); 375 vm_map_pageable(buffer_map, curbuf, curbuf + curbufsize, FALSE); 376 vm_map_simplify(buffer_map, curbuf); 377 } 378 379 /* 380 * Allocate a submap for exec arguments. This map effectively 381 * limits the number of processes exec'ing at any time. 382 */ 383 exec_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, 384 16*NCARGS, TRUE); 385 386 /* 387 * Allocate a submap for physio 388 */ 389 phys_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, 390 VM_PHYS_SIZE, TRUE); 391 392 /* 393 * Allocate mbuf pool. 394 */ 395 mclrefcnt = (char *)malloc(NMBCLUSTERS + CLBYTES/MCLBYTES, 396 M_MBUF, M_NOWAIT); 397 bzero(mclrefcnt, NMBCLUSTERS + CLBYTES/MCLBYTES); 398 mb_map = kmem_suballoc(kernel_map, (vm_offset_t *)&mbutl, &maxaddr, 399 VM_MBUF_SIZE, FALSE); 400 401 /* 402 * Initialize callouts. 403 */ 404 callfree = callout; 405 for (i = 1; i < ncallout; i++) 406 callout[i - 1].c_next = &callout[i]; 407 408 printf("avail mem = %d\n", ptoa(cnt.v_free_count)); 409 printf("using %d buffers containing %d bytes of memory\n", 410 nbuf, bufpages * CLBYTES); 411 412 /* 413 * Set up the buffers. 414 */ 415 bufinit(); 416 417 /* 418 * Now allow hardware interrupts. 419 */ 420 { 421 int msr; 422 423 splhigh(); 424 asm volatile ("mfmsr %0; ori %0, %0, %1; mtmsr %0" 425 : "=r"(msr) : "K"(PSL_EE)); 426 } 427 428 /* 429 * Configure devices. 430 */ 431 configure(); 432 433 } 434 435 /* 436 * Allocate space for system data structures. 437 */ 438 caddr_t 439 allocsys(v) 440 caddr_t v; 441 { 442 #define valloc(name, type, num) \ 443 v = (caddr_t)(((name) = (type *)v) + (num)) 444 445 valloc(callout, struct callout, ncallout); 446 valloc(swapmap, struct map, nswapmap = maxproc * 2); 447 #ifdef SYSVSHM 448 valloc(shmsegs, struct shmid_ds, shminfo.shmmni); 449 #endif 450 #ifdef SYSVSEM 451 valloc(sema, struct semid_ds, seminfo.semmni); 452 valloc(sem, struct sem, seminfo.semmns); 453 valloc(semu, int, (seminfo.semmnu * seminfo.semusz) / sizeof(int)); 454 #endif 455 #ifdef SYSVMSG 456 valloc(msgpool, char, msginfo.msgmax); 457 valloc(msgmaps, struct msgmap, msginfo.msgseg); 458 valloc(msghdrs, struct msg, msginfo.msgtql); 459 valloc(msqids, struct msqid_ds, msginfo.msgmni); 460 #endif 461 462 /* 463 * Decide on buffer space to use. 464 */ 465 if (bufpages == 0) 466 bufpages = (physmem / 20) / CLSIZE; 467 if (nbuf == 0) { 468 nbuf = bufpages; 469 if (nbuf < 16) 470 nbuf = 16; 471 } 472 if (nswbuf == 0) { 473 nswbuf = (nbuf / 2) & ~1; 474 if (nswbuf > 256) 475 nswbuf = 256; 476 } 477 valloc(swbuf, struct buf, nswbuf); 478 valloc(buf, struct buf, nbuf); 479 480 return v; 481 } 482 483 /* 484 * consinit 485 * Initialize system console. 486 */ 487 void 488 consinit() 489 { 490 static int initted; 491 492 if (initted) 493 return; 494 initted = 1; 495 cninit(); 496 } 497 498 /* 499 * Clear registers on exec 500 */ 501 void 502 setregs(p, pack, stack, retval) 503 struct proc *p; 504 struct exec_package *pack; 505 u_long stack; 506 register_t *retval; 507 { 508 struct trapframe *tf = trapframe(p); 509 510 bzero(tf, sizeof *tf); 511 tf->fixreg[1] = -roundup(-stack + 8, 16); 512 tf->fixreg[3] = *retval = stack; /* bug in init_main.c XXX */ 513 tf->srr0 = pack->ep_entry; 514 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; 515 p->p_addr->u_pcb.pcb_flags = 0; 516 } 517 518 /* 519 * Send a signal to process. 520 */ 521 void 522 sendsig(catcher, sig, mask, code) 523 sig_t catcher; 524 int sig, mask; 525 u_long code; 526 { 527 struct proc *p = curproc; 528 struct trapframe *tf; 529 struct sigframe *fp, frame; 530 struct sigacts *psp = p->p_sigacts; 531 int oldonstack; 532 533 frame.sf_signum = sig; 534 535 tf = trapframe(p); 536 oldonstack = psp->ps_sigstk.ss_flags & SS_ONSTACK; 537 538 /* 539 * Allocate stack space for signal handler. 540 */ 541 if ((psp->ps_flags & SAS_ALTSTACK) 542 && !oldonstack 543 && (psp->ps_sigonstack & sigmask(sig))) { 544 fp = (struct sigframe *)(psp->ps_sigstk.ss_sp 545 + psp->ps_sigstk.ss_size); 546 psp->ps_sigstk.ss_flags |= SS_ONSTACK; 547 } else 548 fp = (struct sigframe *)tf->fixreg[1]; 549 fp = (struct sigframe *)((int)(fp - 1) & ~0xf); 550 551 frame.sf_code = code; 552 553 /* 554 * Generate signal context for SYS_sigreturn. 555 */ 556 frame.sf_sc.sc_onstack = oldonstack; 557 frame.sf_sc.sc_mask = mask; 558 bcopy(tf, &frame.sf_sc.sc_frame, sizeof *tf); 559 if (copyout(&frame, fp, sizeof frame) != 0) 560 sigexit(p, SIGILL); 561 562 tf->fixreg[1] = (int)fp; 563 tf->lr = (int)catcher; 564 tf->fixreg[3] = (int)sig; 565 tf->fixreg[4] = (int)code; 566 tf->fixreg[5] = (int)&frame.sf_sc; 567 tf->srr0 = (int)(((char *)PS_STRINGS) 568 - (p->p_emul->e_esigcode - p->p_emul->e_sigcode)); 569 } 570 571 /* 572 * System call to cleanup state after a signal handler returns. 573 */ 574 int 575 sys_sigreturn(p, v, retval) 576 struct proc *p; 577 void *v; 578 register_t *retval; 579 { 580 struct sys_sigreturn_args /* { 581 syscallarg(struct sigcontext *) sigcntxp; 582 } */ *uap = v; 583 struct sigcontext sc; 584 struct trapframe *tf; 585 int error; 586 587 if (error = copyin(SCARG(uap, sigcntxp), &sc, sizeof sc)) 588 return error; 589 tf = trapframe(p); 590 if ((sc.sc_frame.srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) 591 return EINVAL; 592 bcopy(&sc.sc_frame, tf, sizeof *tf); 593 if (sc.sc_onstack & 1) 594 p->p_sigacts->ps_sigstk.ss_flags |= SS_ONSTACK; 595 else 596 p->p_sigacts->ps_sigstk.ss_flags &= ~SS_ONSTACK; 597 p->p_sigmask = sc.sc_mask & ~sigcantmask; 598 return EJUSTRETURN; 599 } 600 601 /* 602 * Machine dependent system variables. 603 * None for now. 604 */ 605 int 606 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 607 int *name; 608 u_int namelen; 609 void *oldp; 610 size_t *oldlenp; 611 void *newp; 612 size_t newlen; 613 struct proc *p; 614 { 615 /* all sysctl names at this level are terminal */ 616 if (namelen != 1) 617 return ENOTDIR; 618 switch (name[0]) { 619 default: 620 return EOPNOTSUPP; 621 } 622 } 623 624 /* 625 * Crash dump handling. 626 */ 627 u_long dumpmag = 0x8fca0101; /* magic number */ 628 int dumpsize = 0; /* size of dump in pages */ 629 long dumplo = -1; /* blocks */ 630 631 void 632 dumpsys() 633 { 634 printf("dumpsys: TBD\n"); 635 } 636 637 int cpl; 638 int clockpending, softclockpending, softnetpending; 639 640 /* 641 * Soft networking interrupts. 642 */ 643 void 644 softnet() 645 { 646 int isr = netisr; 647 648 netisr = 0; 649 #ifdef INET 650 #include "ether.h" 651 #if NETHER > 0 652 if (isr & (1 << NETISR_ARP)) 653 arpintr(); 654 #endif 655 if (isr & (1 << NETISR_IP)) 656 ipintr(); 657 #endif 658 #ifdef IMP 659 if (isr & (1 << NETISR_IMP)) 660 impintr(); 661 #endif 662 #ifdef NS 663 if (isr & (1 << NETISR_NS)) 664 nsintr(); 665 #endif 666 #ifdef ISO 667 if (isr & (1 << NETISR_ISO)) 668 clnlintr(); 669 #endif 670 #ifdef CCITT 671 if (isr & (1 << NETISR_CCITT)) 672 ccittintr(); 673 #endif 674 #include "ppp.h" 675 #if NPPP > 0 676 if (isr & (1 << NETISR_PPP)) 677 pppintr(); 678 #endif 679 } 680 681 /* 682 * Stray interrupts. 683 */ 684 void 685 strayintr(irq) 686 int irq; 687 { 688 log(LOG_ERR, "stray interrupt %d\n", irq); 689 } 690 691 int 692 splraise(bits) 693 int bits; 694 { 695 int old; 696 697 old = cpl; 698 cpl |= bits; 699 700 if ((bits & SPLMACHINE) & ~old) 701 (*machine_interface.splx)(cpl & SPLMACHINE); 702 703 return old; 704 } 705 706 int 707 splx(new) 708 int new; 709 { 710 int pending, old = cpl; 711 int emsr, dmsr; 712 713 asm ("mfmsr %0" : "=r"(emsr)); 714 dmsr = emsr & ~PSL_EE; 715 716 cpl = new; 717 718 if ((new & SPLMACHINE) != (old & SPLMACHINE)) 719 (*machine_interface.splx)(new & SPLMACHINE); 720 721 while (1) { 722 cpl = new; 723 724 asm volatile ("mtmsr %0" :: "r"(dmsr)); 725 if (clockpending && !(cpl & SPLCLOCK)) { 726 struct clockframe frame; 727 extern int intr_depth; 728 729 cpl |= SPLCLOCK; 730 clockpending--; 731 asm volatile ("mtmsr %0" :: "r"(emsr)); 732 733 /* 734 * Fake a clock interrupt frame 735 */ 736 frame.pri = new; 737 frame.depth = intr_depth + 1; 738 frame.srr1 = 0; 739 frame.srr0 = (int)splx; 740 /* 741 * Do standard timer interrupt stuff 742 */ 743 hardclock(&frame); 744 continue; 745 } 746 if (softclockpending && !(cpl & SPLSOFTCLOCK)) { 747 748 cpl |= SPLSOFTCLOCK; 749 softclockpending = 0; 750 asm volatile ("mtmsr %0" :: "r"(emsr)); 751 752 softclock(); 753 continue; 754 } 755 if (softnetpending && !(cpl & SPLSOFTNET)) { 756 cpl |= SPLSOFTNET; 757 softnetpending = 0; 758 asm volatile ("mtmsr %0" :: "r"(emsr)); 759 softnet(); 760 continue; 761 } 762 763 asm volatile ("mtmsr %0" :: "r"(emsr)); 764 765 return old; 766 } 767 } 768 769 /* 770 * This one is similar to the above, but returns with interrupts disabled. 771 * It is intended for use during interrupt exit (as the name implies :-)). 772 */ 773 void 774 intr_return(level) 775 int level; 776 { 777 int pending, old = cpl; 778 int emsr, dmsr; 779 780 asm ("mfmsr %0" : "=r"(emsr)); 781 dmsr = emsr & ~PSL_EE; 782 783 cpl = level; 784 785 if ((level & SPLMACHINE) != (old & SPLMACHINE)) 786 (*machine_interface.splx)(level & SPLMACHINE); 787 788 while (1) { 789 cpl = level; 790 791 asm volatile ("mtmsr %0" :: "r"(dmsr)); 792 if (clockpending && !(cpl & SPLCLOCK)) { 793 struct clockframe frame; 794 extern int intr_depth; 795 796 cpl |= SPLCLOCK; 797 clockpending--; 798 asm volatile ("mtmsr %0" :: "r"(emsr)); 799 800 /* 801 * Fake a clock interrupt frame 802 */ 803 frame.pri = level | (clockpending ? SPLSOFTCLOCK : 0); 804 frame.depth = intr_depth + 1; 805 frame.srr1 = 0; 806 frame.srr0 = (int)splx; 807 /* 808 * Do standard timer interrupt stuff 809 */ 810 hardclock(&frame); 811 continue; 812 } 813 if (softclockpending && !(cpl & SPLSOFTCLOCK)) { 814 815 cpl |= SPLSOFTCLOCK; 816 softclockpending = 0; 817 asm volatile ("mtmsr %0" :: "r"(emsr)); 818 819 softclock(); 820 continue; 821 } 822 if (softnetpending && !(cpl & SPLSOFTNET)) { 823 cpl |= SPLSOFTNET; 824 softnetpending = 0; 825 asm volatile ("mtmsr %0" :: "r"(emsr)); 826 softnet(); 827 continue; 828 } 829 break; 830 } 831 } 832 833 /* 834 * Halt or reboot the machine after syncing/dumping according to howto. 835 */ 836 void 837 boot(howto, what) 838 int howto; 839 char *what; 840 { 841 static int syncing; 842 static char str[256]; 843 char *ap = str, *ap1 = ap; 844 845 boothowto = howto; 846 if (!cold && !(howto & RB_NOSYNC) && !syncing) { 847 syncing = 1; 848 vfs_shutdown(); /* sync */ 849 resettodr(); /* set wall clock */ 850 } 851 splhigh(); 852 if (howto & RB_HALT) { 853 doshutdownhooks(); 854 printf("halted\n\n"); 855 ppc_exit(); 856 } 857 if (!cold && (howto & RB_DUMP)) 858 dumpsys(); 859 doshutdownhooks(); 860 printf("rebooting\n\n"); 861 if (what && *what) { 862 if (strlen(what) > sizeof str - 5) 863 printf("boot string too large, ignored\n"); 864 else { 865 strcpy(str, what); 866 ap1 = ap = str + strlen(str); 867 *ap++ = ' '; 868 } 869 } 870 *ap++ = '-'; 871 if (howto & RB_SINGLE) 872 *ap++ = 's'; 873 if (howto & RB_KDB) 874 *ap++ = 'd'; 875 *ap++ = 0; 876 if (ap[-2] == '-') 877 *ap1 = 0; 878 ppc_boot(str); 879 } 880 881 /* 882 * OpenFirmware callback routine 883 */ 884 void 885 callback(p) 886 void *p; 887 { 888 panic("callback"); /* for now XXX */ 889 } 890 891 /* 892 * Fake routines for spl/interrupt handling before autoconfig 893 */ 894 static void 895 fake_splx(new) 896 int new; 897 { 898 } 899 900 static void 901 fake_irq_establish(irq, level, handler, arg) 902 int irq, level; 903 void (*handler) __P((void *)); 904 void *arg; 905 { 906 panic("fake_irq_establish"); 907 } 908
Indexes created Thu Oct 02 10:09:58 GMT 2025