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