machdep.c revision 112898
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#ifndef lint 58static const char rcsid[] = 59 "$FreeBSD: head/sys/powerpc/aim/machdep.c 112898 2003-04-01 00:18:55Z jeff $"; 60#endif /* not lint */ 61 62#include "opt_ddb.h" 63#include "opt_compat.h" 64#include "opt_msgbuf.h" 65 66#include <sys/param.h> 67#include <sys/systm.h> 68#include <sys/eventhandler.h> 69#include <sys/imgact.h> 70#include <sys/sysproto.h> 71#include <sys/lock.h> 72#include <sys/mutex.h> 73#include <sys/ktr.h> 74#include <sys/signalvar.h> 75#include <sys/kernel.h> 76#include <sys/proc.h> 77#include <sys/malloc.h> 78#include <sys/reboot.h> 79#include <sys/bio.h> 80#include <sys/buf.h> 81#include <sys/bus.h> 82#include <sys/mbuf.h> 83#include <sys/vmmeter.h> 84#include <sys/msgbuf.h> 85#include <sys/exec.h> 86#include <sys/sysctl.h> 87#include <sys/uio.h> 88#include <sys/linker.h> 89#include <sys/cons.h> 90#include <sys/ucontext.h> 91#include <sys/sysent.h> 92#include <net/netisr.h> 93#include <vm/vm.h> 94#include <vm/vm_kern.h> 95#include <vm/vm_page.h> 96#include <vm/vm_map.h> 97#include <vm/vm_extern.h> 98#include <vm/vm_object.h> 99#include <vm/vm_pager.h> 100#include <sys/user.h> 101#include <sys/ptrace.h> 102#include <machine/bat.h> 103#include <machine/clock.h> 104#include <machine/md_var.h> 105#include <machine/metadata.h> 106#include <machine/reg.h> 107#include <machine/fpu.h> 108#include <machine/vmparam.h> 109#include <machine/elf.h> 110#include <machine/trap.h> 111#include <machine/powerpc.h> 112#include <dev/ofw/openfirm.h> 113#include <ddb/ddb.h> 114#include <sys/vnode.h> 115#include <machine/sigframe.h> 116 117int cold = 1; 118 119char pcpu0[PAGE_SIZE]; 120char uarea0[UAREA_PAGES * PAGE_SIZE]; 121struct trapframe frame0; 122 123vm_offset_t kstack0; 124vm_offset_t kstack0_phys; 125 126char machine[] = "powerpc"; 127SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 128 129static char model[128]; 130SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, model, 0, ""); 131 132static int cacheline_size = CACHELINESIZE; 133SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 134 CTLFLAG_RD, &cacheline_size, 0, ""); 135 136char bootpath[256]; 137 138#ifdef DDB 139/* start and end of kernel symbol table */ 140void *ksym_start, *ksym_end; 141#endif /* DDB */ 142 143static void cpu_startup(void *); 144SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL) 145 146void powerpc_init(u_int, u_int, u_int, void *); 147 148int save_ofw_mapping(void); 149int restore_ofw_mapping(void); 150 151void install_extint(void (*)(void)); 152 153int setfault(faultbuf); /* defined in locore.S */ 154 155long Maxmem = 0; 156 157struct pmap ofw_pmap; 158extern int ofmsr; 159 160struct bat battable[16]; 161 162struct kva_md_info kmi; 163 164static void 165powerpc_ofw_shutdown(void *junk, int howto) 166{ 167 if (howto & RB_HALT) { 168 OF_exit(); 169 } 170} 171 172static void 173cpu_startup(void *dummy) 174{ 175 176 /* 177 * Initialise the decrementer-based clock. 178 */ 179 decr_init(); 180 181 /* 182 * Good {morning,afternoon,evening,night}. 183 */ 184 cpu_setup(PCPU_GET(cpuid)); 185 186 /* startrtclock(); */ 187#ifdef PERFMON 188 perfmon_init(); 189#endif 190 printf("real memory = %ld (%ld MB)\n", ptoa(Maxmem), 191 ptoa(Maxmem) / 1048576); 192 193 /* 194 * Display any holes after the first chunk of extended memory. 195 */ 196 if (bootverbose) { 197 int indx; 198 199 printf("Physical memory chunk(s):\n"); 200 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 201 int size1 = phys_avail[indx + 1] - phys_avail[indx]; 202 203 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", 204 phys_avail[indx], phys_avail[indx + 1] - 1, size1, 205 size1 / PAGE_SIZE); 206 } 207 } 208 209 vm_ksubmap_init(&kmi); 210 211 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 212 ptoa(cnt.v_free_count) / 1048576); 213 214 /* 215 * Set up buffers, so they can be used to read disk labels. 216 */ 217 bufinit(); 218 vm_pager_bufferinit(); 219 220 EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0, 221 SHUTDOWN_PRI_LAST); 222 223#ifdef SMP 224 /* 225 * OK, enough kmem_alloc/malloc state should be up, lets get on with it! 226 */ 227 mp_start(); /* fire up the secondaries */ 228 mp_announce(); 229#endif /* SMP */ 230} 231 232extern char kernel_text[], _end[]; 233 234extern void *trapcode, *trapsize; 235extern void *alitrap, *alisize; 236extern void *dsitrap, *dsisize; 237extern void *isitrap, *isisize; 238extern void *decrint, *decrsize; 239extern void *tlbimiss, *tlbimsize; 240extern void *tlbdlmiss, *tlbdlmsize; 241extern void *tlbdsmiss, *tlbdsmsize; 242extern void *extint, *extsize; 243 244#if 0 /* XXX: interrupt handler. We'll get to this later */ 245extern void ext_intr(void); 246#endif 247 248#ifdef DDB 249extern ddblow, ddbsize; 250#endif 251#ifdef IPKDB 252extern ipkdblow, ipkdbsize; 253#endif 254 255void 256powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp) 257{ 258 struct pcpu *pc; 259 vm_offset_t end, off; 260 void *kmdp; 261 262 end = 0; 263 kmdp = NULL; 264 265 /* 266 * Parse metadata if present and fetch parameters. Must be done 267 * before console is inited so cninit gets the right value of 268 * boothowto. 269 */ 270 if (mdp != NULL) { 271 preload_metadata = mdp; 272 kmdp = preload_search_by_type("elf kernel"); 273 if (kmdp != NULL) { 274 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 275 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 276 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 277 } 278 } 279 280 /* 281 * Initialize the console before printing anything. 282 */ 283 cninit(); 284 285 /* 286 * Complain if there is no metadata. 287 */ 288 if (mdp == NULL || kmdp == NULL) { 289 printf("powerpc_init: no loader metadata.\n"); 290 } 291 292#ifdef DDB 293 kdb_init(); 294#endif 295 /* 296 * XXX: Initialize the interrupt tables. 297 */ 298 bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize); 299 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); 300 bcopy(&isitrap, (void *)EXC_ISI, (size_t)&isisize); 301 bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize); 302 bcopy(&trapcode, (void *)EXC_ALI, (size_t)&trapsize); 303 bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize); 304 bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize); 305 bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize); 306 bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize); 307 bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize); 308 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 309 310 /* 311 * Start initializing proc0 and thread0. 312 */ 313 proc_linkup(&proc0, &ksegrp0, &kse0, &thread0); 314 proc0.p_uarea = (struct user *)uarea0; 315 proc0.p_stats = &proc0.p_uarea->u_stats; 316 thread0.td_frame = &frame0; 317 318 /* 319 * Set up per-cpu data. 320 */ 321 pc = (struct pcpu *)(pcpu0 + PAGE_SIZE) - 1; 322 pcpu_init(pc, 0, sizeof(struct pcpu)); 323 pc->pc_curthread = &thread0; 324 pc->pc_curpcb = thread0.td_pcb; 325 pc->pc_cpuid = 0; 326 /* pc->pc_mid = mid; */ 327 328 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 329 330 mutex_init(); 331 332 /* 333 * Make sure translation has been enabled 334 */ 335 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI); 336 337 /* 338 * Initialise virtual memory. 339 */ 340 pmap_bootstrap(startkernel, endkernel); 341 342 /* 343 * Initialize tunables. 344 */ 345 init_param1(); 346 init_param2(physmem); 347 348 /* 349 * Finish setting up thread0. 350 */ 351 thread0.td_kstack = kstack0; 352 thread0.td_pcb = (struct pcb *) 353 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 354 355 /* 356 * Map and initialise the message buffer. 357 */ 358 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 359 pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off); 360 msgbufinit(msgbufp, MSGBUF_SIZE); 361} 362 363void 364bzero(void *buf, size_t len) 365{ 366 caddr_t p; 367 368 p = buf; 369 370 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 371 *p++ = 0; 372 len--; 373 } 374 375 while (len >= sizeof(u_long) * 8) { 376 *(u_long*) p = 0; 377 *((u_long*) p + 1) = 0; 378 *((u_long*) p + 2) = 0; 379 *((u_long*) p + 3) = 0; 380 len -= sizeof(u_long) * 8; 381 *((u_long*) p + 4) = 0; 382 *((u_long*) p + 5) = 0; 383 *((u_long*) p + 6) = 0; 384 *((u_long*) p + 7) = 0; 385 p += sizeof(u_long) * 8; 386 } 387 388 while (len >= sizeof(u_long)) { 389 *(u_long*) p = 0; 390 len -= sizeof(u_long); 391 p += sizeof(u_long); 392 } 393 394 while (len) { 395 *p++ = 0; 396 len--; 397 } 398} 399 400void 401sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code) 402{ 403 struct trapframe *tf; 404 struct sigframe *sfp; 405 struct sigacts *psp; 406 struct sigframe sf; 407 struct thread *td; 408 struct proc *p; 409 int oonstack, rndfsize; 410 411 td = curthread; 412 p = td->td_proc; 413 psp = p->p_sigacts; 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 PROC_UNLOCK(p); 445 446 /* 447 * Translate the signal if appropriate (Linux emu ?) 448 */ 449 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 450 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 451 452 /* 453 * Save the floating-point state, if necessary, then copy it. 454 */ 455 /* XXX */ 456 457 /* 458 * Set up the registers to return to sigcode. 459 * 460 * r1/sp - sigframe ptr 461 * lr - sig function, dispatched to by blrl in trampoline 462 * r3 - sig number 463 * r4 - SIGINFO ? &siginfo : exception code 464 * r5 - user context 465 * srr0 - trampoline function addr 466 */ 467 tf->lr = (register_t)catcher; 468 tf->fixreg[1] = (register_t)sfp; 469 tf->fixreg[FIRSTARG] = sig; 470 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; 471 472 PROC_LOCK(p); 473 if (SIGISMEMBER(p->p_sigacts->ps_siginfo, sig)) { 474 /* 475 * Signal handler installed with SA_SIGINFO. 476 */ 477 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; 478 479 /* 480 * Fill siginfo structure. 481 */ 482 sf.sf_si.si_signo = sig; 483 sf.sf_si.si_code = code; 484 sf.sf_si.si_addr = (void *)tf->srr0; 485 } else { 486 /* Old FreeBSD-style arguments. */ 487 tf->fixreg[FIRSTARG+1] = code; 488 } 489 PROC_UNLOCK(p); 490 491 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 492 493 /* 494 * copy the frame out to userland. 495 */ 496 if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) { 497 /* 498 * Process has trashed its stack. Kill it. 499 */ 500 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 501 PROC_LOCK(p); 502 sigexit(td, SIGILL); 503 } 504 505 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, 506 tf->srr0, tf->fixreg[1]); 507 508 PROC_LOCK(p); 509} 510 511int 512sigreturn(struct thread *td, struct sigreturn_args *uap) 513{ 514 struct trapframe *tf; 515 struct proc *p; 516 ucontext_t uc; 517 518 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 519 520 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 521 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 522 return (EFAULT); 523 } 524 525 /* 526 * Don't let the user set privileged MSR bits 527 */ 528 tf = td->td_frame; 529 if ((uc.uc_mcontext.mc_frame.srr1 & PSL_USERSTATIC) != 530 (tf->srr1 & PSL_USERSTATIC)) { 531 return (EINVAL); 532 } 533 534 /* 535 * Restore the user-supplied context 536 */ 537 memcpy(tf, &uc.uc_mcontext.mc_frame, sizeof(struct trapframe)); 538 539 p = td->td_proc; 540 PROC_LOCK(p); 541 td->td_sigmask = uc.uc_sigmask; 542 SIG_CANTMASK(td->td_sigmask); 543 signotify(td); 544 PROC_UNLOCK(p); 545 546 /* 547 * Restore FP state 548 */ 549 /* XXX */ 550 551 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", 552 td, tf->srr0, tf->fixreg[1]); 553 554 return (EJUSTRETURN); 555} 556 557#ifdef COMPAT_FREEBSD4 558int 559freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 560{ 561 562 return sigreturn(td, (struct sigreturn_args *)uap); 563} 564#endif 565 566int 567get_mcontext(struct thread *td, mcontext_t *mcp) 568{ 569 570 return (ENOSYS); 571} 572 573int 574set_mcontext(struct thread *td, const mcontext_t *mcp) 575{ 576 577 return (ENOSYS); 578} 579 580void 581cpu_boot(int howto) 582{ 583} 584 585/* 586 * Shutdown the CPU as much as possible. 587 */ 588void 589cpu_halt(void) 590{ 591 592 OF_exit(); 593} 594 595/* 596 * Set set up registers on exec. 597 */ 598void 599exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 600{ 601 struct trapframe *tf; 602 struct ps_strings arginfo; 603 604 tf = trapframe(td); 605 bzero(tf, sizeof *tf); 606 tf->fixreg[1] = -roundup(-stack + 8, 16); 607 608 /* 609 * XXX Machine-independent code has already copied arguments and 610 * XXX environment to userland. Get them back here. 611 */ 612 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); 613 614 /* 615 * Set up arguments for _start(): 616 * _start(argc, argv, envp, obj, cleanup, ps_strings); 617 * 618 * Notes: 619 * - obj and cleanup are the auxilliary and termination 620 * vectors. They are fixed up by ld.elf_so. 621 * - ps_strings is a NetBSD extention, and will be 622 * ignored by executables which are strictly 623 * compliant with the SVR4 ABI. 624 * 625 * XXX We have to set both regs and retval here due to different 626 * XXX calling convention in trap.c and init_main.c. 627 */ 628 /* 629 * XXX PG: these get overwritten in the syscall return code. 630 * execve() should return EJUSTRETURN, like it does on NetBSD. 631 * Emulate by setting the syscall return value cells. The 632 * registers still have to be set for init's fork trampoline. 633 */ 634 td->td_retval[0] = arginfo.ps_nargvstr; 635 td->td_retval[1] = (register_t)arginfo.ps_argvstr; 636 tf->fixreg[3] = arginfo.ps_nargvstr; 637 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 638 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 639 tf->fixreg[6] = 0; /* auxillary vector */ 640 tf->fixreg[7] = 0; /* termination vector */ 641 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 642 643 tf->srr0 = entry; 644 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; 645 td->td_pcb->pcb_flags = 0; 646} 647 648#if !defined(DDB) 649void 650Debugger(const char *msg) 651{ 652 653 printf("Debugger(\"%s\") called.\n", msg); 654} 655#endif /* !defined(DDB) */ 656 657/* XXX: dummy {fill,set}_[fp]regs */ 658int 659fill_regs(struct thread *td, struct reg *regs) 660{ 661 662 return (ENOSYS); 663} 664 665int 666fill_dbregs(struct thread *td, struct dbreg *dbregs) 667{ 668 669 return (ENOSYS); 670} 671 672int 673fill_fpregs(struct thread *td, struct fpreg *fpregs) 674{ 675 676 return (ENOSYS); 677} 678 679int 680set_regs(struct thread *td, struct reg *regs) 681{ 682 683 return (ENOSYS); 684} 685 686int 687set_dbregs(struct thread *td, struct dbreg *dbregs) 688{ 689 690 return (ENOSYS); 691} 692 693int 694set_fpregs(struct thread *td, struct fpreg *fpregs) 695{ 696 697 return (ENOSYS); 698} 699 700int 701ptrace_set_pc(struct thread *td, unsigned long addr) 702{ 703 704 /* XXX: coming soon... */ 705 return (ENOSYS); 706} 707 708int 709ptrace_single_step(struct thread *td) 710{ 711 712 /* XXX: coming soon... */ 713 return (ENOSYS); 714} 715 716/* 717 * Initialise a struct pcpu. 718 */ 719void 720cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 721{ 722 723 pcpu->pc_current_asngen = 1; 724} 725 726/* 727 * kcopy(const void *src, void *dst, size_t len); 728 * 729 * Copy len bytes from src to dst, aborting if we encounter a fatal 730 * page fault. 731 * 732 * kcopy() _must_ save and restore the old fault handler since it is 733 * called by uiomove(), which may be in the path of servicing a non-fatal 734 * page fault. 735 */ 736int 737kcopy(const void *src, void *dst, size_t len) 738{ 739 struct thread *td; 740 faultbuf env, *oldfault; 741 int rv; 742 743 td = PCPU_GET(curthread); 744 oldfault = td->td_pcb->pcb_onfault; 745 if ((rv = setfault(env)) != 0) { 746 td->td_pcb->pcb_onfault = oldfault; 747 return rv; 748 } 749 750 memcpy(dst, src, len); 751 752 td->td_pcb->pcb_onfault = oldfault; 753 return (0); 754} 755 756 757intptr_t 758casuptr(intptr_t *p, intptr_t old, intptr_t new) 759{ 760 return (-1); 761} 762 763