1 /* 2 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 3 * Copyright (C) 1995, 1996 TooLs GmbH. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by TooLs GmbH. 17 * 4. The name of TooLs GmbH may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 /* 32 * Copyright (C) 2001 Benno Rice 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 44 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR 45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 46 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 47 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 49 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 50 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 51 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 52 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 53 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 54 * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $ 55 */ 56 57 #include <sys/cdefs.h> 58 __FBSDID("$FreeBSD$"); 59 60 #include "opt_ddb.h" 61 #include "opt_compat.h" 62 #include "opt_kstack_pages.h" 63 #include "opt_msgbuf.h" 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/eventhandler.h> 68 #include <sys/imgact.h> 69 #include <sys/sysproto.h> 70 #include <sys/lock.h> 71 #include <sys/mutex.h> 72 #include <sys/ktr.h> 73 #include <sys/signalvar.h> 74 #include <sys/kernel.h> 75 #include <sys/proc.h> 76 #include <sys/malloc.h> 77 #include <sys/reboot.h> 78 #include <sys/bio.h> 79 #include <sys/buf.h> 80 #include <sys/bus.h> 81 #include <sys/mbuf.h> 82 #include <sys/vmmeter.h> 83 #include <sys/msgbuf.h> 84 #include <sys/exec.h> 85 #include <sys/sysctl.h> 86 #include <sys/uio.h> 87 #include <sys/linker.h> 88 #include <sys/cons.h> 89 #include <sys/ucontext.h> 90 #include <sys/sysent.h> 91 #include <net/netisr.h> 92 #include <vm/vm.h> 93 #include <vm/vm_kern.h> 94 #include <vm/vm_page.h> 95 #include <vm/vm_map.h> 96 #include <vm/vm_extern.h> 97 #include <vm/vm_object.h> 98 #include <vm/vm_pager.h> 99 #include <sys/user.h> 100 #include <sys/ptrace.h> 101 #include <machine/bat.h> 102 #include <machine/clock.h> 103 #include <machine/md_var.h> 104 #include <machine/metadata.h> 105 #include <machine/reg.h> 106 #include <machine/fpu.h> 107 #include <machine/vmparam.h> 108 #include <machine/elf.h> 109 #include <machine/trap.h> 110 #include <machine/powerpc.h> 111 #include <dev/ofw/openfirm.h> 112 #include <ddb/ddb.h> 113 #include <sys/vnode.h> 114 #include <machine/sigframe.h> 115 116 int cold = 1; 117 118 char pcpu0[PAGE_SIZE]; 119 char uarea0[UAREA_PAGES * PAGE_SIZE]; 120 struct trapframe frame0; 121 122 vm_offset_t kstack0; 123 vm_offset_t kstack0_phys; 124 125 char machine[] = "powerpc"; 126 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 127 128 static char model[128]; 129 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, model, 0, ""); 130 131 static int cacheline_size = CACHELINESIZE; 132 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 133 CTLFLAG_RD, &cacheline_size, 0, ""); 134 135 #ifdef DDB 136 /* start and end of kernel symbol table */ 137 void *ksym_start, *ksym_end; 138 #endif /* DDB */ 139 140 static void cpu_startup(void *); 141 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL) 142 143 void powerpc_init(u_int, u_int, u_int, void *); 144 145 int save_ofw_mapping(void); 146 int restore_ofw_mapping(void); 147 148 void install_extint(void (*)(void)); 149 150 int setfault(faultbuf); /* defined in locore.S */ 151 152 long Maxmem = 0; 153 154 struct pmap ofw_pmap; 155 extern int ofmsr; 156 157 struct bat battable[16]; 158 159 struct kva_md_info kmi; 160 161 static void 162 powerpc_ofw_shutdown(void *junk, int howto) 163 { 164 if (howto & RB_HALT) { 165 OF_exit(); 166 } 167 } 168 169 static void 170 cpu_startup(void *dummy) 171 { 172 173 /* 174 * Initialise the decrementer-based clock. 175 */ 176 decr_init(); 177 178 /* 179 * Good {morning,afternoon,evening,night}. 180 */ 181 cpu_setup(PCPU_GET(cpuid)); 182 183 /* startrtclock(); */ 184 #ifdef PERFMON 185 perfmon_init(); 186 #endif 187 printf("real memory = %ld (%ld MB)\n", ptoa(Maxmem), 188 ptoa(Maxmem) / 1048576); 189 190 /* 191 * Display any holes after the first chunk of extended memory. 192 */ 193 if (bootverbose) { 194 int indx; 195 196 printf("Physical memory chunk(s):\n"); 197 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 198 int size1 = phys_avail[indx + 1] - phys_avail[indx]; 199 200 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", 201 phys_avail[indx], phys_avail[indx + 1] - 1, size1, 202 size1 / PAGE_SIZE); 203 } 204 } 205 206 vm_ksubmap_init(&kmi); 207 208 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 209 ptoa(cnt.v_free_count) / 1048576); 210 211 /* 212 * Set up buffers, so they can be used to read disk labels. 213 */ 214 bufinit(); 215 vm_pager_bufferinit(); 216 217 EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0, 218 SHUTDOWN_PRI_LAST); 219 220 #ifdef SMP 221 /* 222 * OK, enough kmem_alloc/malloc state should be up, lets get on with it! 223 */ 224 mp_start(); /* fire up the secondaries */ 225 mp_announce(); 226 #endif /* SMP */ 227 } 228 229 extern char kernel_text[], _end[]; 230 231 extern void *trapcode, *trapsize; 232 extern void *alitrap, *alisize; 233 extern void *dsitrap, *dsisize; 234 extern void *isitrap, *isisize; 235 extern void *decrint, *decrsize; 236 extern void *tlbimiss, *tlbimsize; 237 extern void *tlbdlmiss, *tlbdlmsize; 238 extern void *tlbdsmiss, *tlbdsmsize; 239 extern void *extint, *extsize; 240 241 #if 0 /* XXX: interrupt handler. We'll get to this later */ 242 extern void ext_intr(void); 243 #endif 244 245 #ifdef DDB 246 extern ddblow, ddbsize; 247 #endif 248 #ifdef IPKDB 249 extern ipkdblow, ipkdbsize; 250 #endif 251 252 void 253 powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp) 254 { 255 struct pcpu *pc; 256 vm_offset_t end, off; 257 void *kmdp; 258 259 end = 0; 260 kmdp = NULL; 261 262 /* 263 * Parse metadata if present and fetch parameters. Must be done 264 * before console is inited so cninit gets the right value of 265 * boothowto. 266 */ 267 if (mdp != NULL) { 268 preload_metadata = mdp; 269 kmdp = preload_search_by_type("elf kernel"); 270 if (kmdp != NULL) { 271 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 272 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 273 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 274 } 275 } 276 277 /* 278 * Initialize the console before printing anything. 279 */ 280 cninit(); 281 282 /* 283 * Complain if there is no metadata. 284 */ 285 if (mdp == NULL || kmdp == NULL) { 286 printf("powerpc_init: no loader metadata.\n"); 287 } 288 289 #ifdef DDB 290 kdb_init(); 291 #endif 292 /* 293 * XXX: Initialize the interrupt tables. 294 */ 295 bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize); 296 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); 297 bcopy(&isitrap, (void *)EXC_ISI, (size_t)&isisize); 298 bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize); 299 bcopy(&trapcode, (void *)EXC_ALI, (size_t)&trapsize); 300 bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize); 301 bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize); 302 bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize); 303 bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize); 304 bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize); 305 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 306 307 /* 308 * Start initializing proc0 and thread0. 309 */ 310 proc_linkup(&proc0, &ksegrp0, &kse0, &thread0); 311 proc0.p_uarea = (struct user *)uarea0; 312 proc0.p_stats = &proc0.p_uarea->u_stats; 313 thread0.td_frame = &frame0; 314 315 /* 316 * Set up per-cpu data. 317 */ 318 pc = (struct pcpu *)(pcpu0 + PAGE_SIZE) - 1; 319 pcpu_init(pc, 0, sizeof(struct pcpu)); 320 pc->pc_curthread = &thread0; 321 pc->pc_curpcb = thread0.td_pcb; 322 pc->pc_cpuid = 0; 323 /* pc->pc_mid = mid; */ 324 325 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 326 327 mutex_init(); 328 329 /* 330 * Make sure translation has been enabled 331 */ 332 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI); 333 334 /* 335 * Initialise virtual memory. 336 */ 337 pmap_bootstrap(startkernel, endkernel); 338 339 /* 340 * Initialize tunables. 341 */ 342 init_param1(); 343 init_param2(physmem); 344 345 /* 346 * Finish setting up thread0. 347 */ 348 thread0.td_kstack = kstack0; 349 thread0.td_pcb = (struct pcb *) 350 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 351 352 /* 353 * Map and initialise the message buffer. 354 */ 355 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 356 pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off); 357 msgbufinit(msgbufp, MSGBUF_SIZE); 358 } 359 360 void 361 bzero(void *buf, size_t len) 362 { 363 caddr_t p; 364 365 p = buf; 366 367 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 368 *p++ = 0; 369 len--; 370 } 371 372 while (len >= sizeof(u_long) * 8) { 373 *(u_long*) p = 0; 374 *((u_long*) p + 1) = 0; 375 *((u_long*) p + 2) = 0; 376 *((u_long*) p + 3) = 0; 377 len -= sizeof(u_long) * 8; 378 *((u_long*) p + 4) = 0; 379 *((u_long*) p + 5) = 0; 380 *((u_long*) p + 6) = 0; 381 *((u_long*) p + 7) = 0; 382 p += sizeof(u_long) * 8; 383 } 384 385 while (len >= sizeof(u_long)) { 386 *(u_long*) p = 0; 387 len -= sizeof(u_long); 388 p += sizeof(u_long); 389 } 390 391 while (len) { 392 *p++ = 0; 393 len--; 394 } 395 } 396 397 void 398 sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code) 399 { 400 struct trapframe *tf; 401 struct sigframe *sfp; 402 struct sigacts *psp; 403 struct sigframe sf; 404 struct thread *td; 405 struct proc *p; 406 int oonstack, rndfsize; 407 408 td = curthread; 409 p = td->td_proc; 410 PROC_LOCK_ASSERT(p, MA_OWNED); 411 psp = p->p_sigacts; 412 mtx_assert(&psp->ps_mtx, MA_OWNED); 413 tf = td->td_frame; 414 oonstack = sigonstack(tf->fixreg[1]); 415 416 rndfsize = ((sizeof(sf) + 15) / 16) * 16; 417 418 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 419 catcher, sig); 420 421 /* 422 * Save user context 423 */ 424 memset(&sf, 0, sizeof(sf)); 425 sf.sf_uc.uc_sigmask = *mask; 426 sf.sf_uc.uc_stack = p->p_sigstk; 427 sf.sf_uc.uc_stack.ss_flags = (p->p_flag & P_ALTSTACK) 428 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 429 430 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 431 memcpy(&sf.sf_uc.uc_mcontext.mc_frame, tf, sizeof(struct trapframe)); 432 433 /* 434 * Allocate and validate space for the signal handler context. 435 */ 436 if ((p->p_flag & P_ALTSTACK) != 0 && !oonstack && 437 SIGISMEMBER(psp->ps_sigonstack, sig)) { 438 sfp = (struct sigframe *)((caddr_t)p->p_sigstk.ss_sp + 439 p->p_sigstk.ss_size - rndfsize); 440 } else { 441 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); 442 } 443 444 /* 445 * Translate the signal if appropriate (Linux emu ?) 446 */ 447 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 448 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 449 450 /* 451 * Save the floating-point state, if necessary, then copy it. 452 */ 453 /* XXX */ 454 455 /* 456 * Set up the registers to return to sigcode. 457 * 458 * r1/sp - sigframe ptr 459 * lr - sig function, dispatched to by blrl in trampoline 460 * r3 - sig number 461 * r4 - SIGINFO ? &siginfo : exception code 462 * r5 - user context 463 * srr0 - trampoline function addr 464 */ 465 tf->lr = (register_t)catcher; 466 tf->fixreg[1] = (register_t)sfp; 467 tf->fixreg[FIRSTARG] = sig; 468 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; 469 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 470 /* 471 * Signal handler installed with SA_SIGINFO. 472 */ 473 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; 474 475 /* 476 * Fill siginfo structure. 477 */ 478 sf.sf_si.si_signo = sig; 479 sf.sf_si.si_code = code; 480 sf.sf_si.si_addr = (void *)tf->srr0; 481 } else { 482 /* Old FreeBSD-style arguments. */ 483 tf->fixreg[FIRSTARG+1] = code; 484 } 485 mtx_unlock(&psp->ps_mtx); 486 PROC_UNLOCK(p); 487 488 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 489 490 /* 491 * copy the frame out to userland. 492 */ 493 if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) { 494 /* 495 * Process has trashed its stack. Kill it. 496 */ 497 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 498 PROC_LOCK(p); 499 sigexit(td, SIGILL); 500 } 501 502 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, 503 tf->srr0, tf->fixreg[1]); 504 505 PROC_LOCK(p); 506 mtx_lock(&psp->ps_mtx); 507 } 508 509 /* 510 * Build siginfo_t for SA thread 511 */ 512 void 513 cpu_thread_siginfo(int sig, u_long code, siginfo_t *si) 514 { 515 struct proc *p; 516 struct thread *td; 517 518 td = curthread; 519 p = td->td_proc; 520 PROC_LOCK_ASSERT(p, MA_OWNED); 521 522 bzero(si, sizeof(*si)); 523 si->si_signo = sig; 524 si->si_code = code; 525 /* XXXKSE fill other fields */ 526 } 527 528 int 529 sigreturn(struct thread *td, struct sigreturn_args *uap) 530 { 531 struct trapframe *tf; 532 struct proc *p; 533 ucontext_t uc; 534 535 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 536 537 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 538 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 539 return (EFAULT); 540 } 541 542 /* 543 * Don't let the user set privileged MSR bits 544 */ 545 tf = td->td_frame; 546 if ((uc.uc_mcontext.mc_frame.srr1 & PSL_USERSTATIC) != 547 (tf->srr1 & PSL_USERSTATIC)) { 548 return (EINVAL); 549 } 550 551 /* 552 * Restore the user-supplied context 553 */ 554 memcpy(tf, &uc.uc_mcontext.mc_frame, sizeof(struct trapframe)); 555 556 p = td->td_proc; 557 PROC_LOCK(p); 558 td->td_sigmask = uc.uc_sigmask; 559 SIG_CANTMASK(td->td_sigmask); 560 signotify(td); 561 PROC_UNLOCK(p); 562 563 /* 564 * Restore FP state 565 */ 566 /* XXX */ 567 568 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", 569 td, tf->srr0, tf->fixreg[1]); 570 571 return (EJUSTRETURN); 572 } 573 574 #ifdef COMPAT_FREEBSD4 575 int 576 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 577 { 578 579 return sigreturn(td, (struct sigreturn_args *)uap); 580 } 581 #endif 582 583 int 584 get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret) 585 { 586 587 return (ENOSYS); 588 } 589 590 int 591 set_mcontext(struct thread *td, const mcontext_t *mcp) 592 { 593 594 return (ENOSYS); 595 } 596 597 void 598 cpu_boot(int howto) 599 { 600 } 601 602 /* 603 * Shutdown the CPU as much as possible. 604 */ 605 void 606 cpu_halt(void) 607 { 608 609 OF_exit(); 610 } 611 612 /* 613 * Set set up registers on exec. 614 */ 615 void 616 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 617 { 618 struct trapframe *tf; 619 struct ps_strings arginfo; 620 621 tf = trapframe(td); 622 bzero(tf, sizeof *tf); 623 tf->fixreg[1] = -roundup(-stack + 8, 16); 624 625 /* 626 * XXX Machine-independent code has already copied arguments and 627 * XXX environment to userland. Get them back here. 628 */ 629 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); 630 631 /* 632 * Set up arguments for _start(): 633 * _start(argc, argv, envp, obj, cleanup, ps_strings); 634 * 635 * Notes: 636 * - obj and cleanup are the auxilliary and termination 637 * vectors. They are fixed up by ld.elf_so. 638 * - ps_strings is a NetBSD extention, and will be 639 * ignored by executables which are strictly 640 * compliant with the SVR4 ABI. 641 * 642 * XXX We have to set both regs and retval here due to different 643 * XXX calling convention in trap.c and init_main.c. 644 */ 645 /* 646 * XXX PG: these get overwritten in the syscall return code. 647 * execve() should return EJUSTRETURN, like it does on NetBSD. 648 * Emulate by setting the syscall return value cells. The 649 * registers still have to be set for init's fork trampoline. 650 */ 651 td->td_retval[0] = arginfo.ps_nargvstr; 652 td->td_retval[1] = (register_t)arginfo.ps_argvstr; 653 tf->fixreg[3] = arginfo.ps_nargvstr; 654 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 655 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 656 tf->fixreg[6] = 0; /* auxillary vector */ 657 tf->fixreg[7] = 0; /* termination vector */ 658 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 659 660 tf->srr0 = entry; 661 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; 662 td->td_pcb->pcb_flags = 0; 663 } 664 665 #if !defined(DDB) 666 void 667 Debugger(const char *msg) 668 { 669 670 printf("Debugger(\"%s\") called.\n", msg); 671 } 672 #endif /* !defined(DDB) */ 673 674 /* XXX: dummy {fill,set}_[fp]regs */ 675 int 676 fill_regs(struct thread *td, struct reg *regs) 677 { 678 679 return (ENOSYS); 680 } 681 682 int 683 fill_dbregs(struct thread *td, struct dbreg *dbregs) 684 { 685 686 return (ENOSYS); 687 } 688 689 int 690 fill_fpregs(struct thread *td, struct fpreg *fpregs) 691 { 692 693 return (ENOSYS); 694 } 695 696 int 697 set_regs(struct thread *td, struct reg *regs) 698 { 699 700 return (ENOSYS); 701 } 702 703 int 704 set_dbregs(struct thread *td, struct dbreg *dbregs) 705 { 706 707 return (ENOSYS); 708 } 709 710 int 711 set_fpregs(struct thread *td, struct fpreg *fpregs) 712 { 713 714 return (ENOSYS); 715 } 716 717 int 718 ptrace_set_pc(struct thread *td, unsigned long addr) 719 { 720 721 /* XXX: coming soon... */ 722 return (ENOSYS); 723 } 724 725 int 726 ptrace_single_step(struct thread *td) 727 { 728 729 /* XXX: coming soon... */ 730 return (ENOSYS); 731 } 732 733 /* 734 * Initialise a struct pcpu. 735 */ 736 void 737 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 738 { 739 740 pcpu->pc_current_asngen = 1; 741 } 742 743 /* 744 * kcopy(const void *src, void *dst, size_t len); 745 * 746 * Copy len bytes from src to dst, aborting if we encounter a fatal 747 * page fault. 748 * 749 * kcopy() _must_ save and restore the old fault handler since it is 750 * called by uiomove(), which may be in the path of servicing a non-fatal 751 * page fault. 752 */ 753 int 754 kcopy(const void *src, void *dst, size_t len) 755 { 756 struct thread *td; 757 faultbuf env, *oldfault; 758 int rv; 759 760 td = PCPU_GET(curthread); 761 oldfault = td->td_pcb->pcb_onfault; 762 if ((rv = setfault(env)) != 0) { 763 td->td_pcb->pcb_onfault = oldfault; 764 return rv; 765 } 766 767 memcpy(dst, src, len); 768 769 td->td_pcb->pcb_onfault = oldfault; 770 return (0); 771 } 772 773 774 intptr_t 775 casuptr(intptr_t *p, intptr_t old, intptr_t new) 776 { 777 return (-1); 778 } 779 780