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_compat.h" 61 #include "opt_ddb.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/kdb.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/cpu.h> 105 #include <machine/md_var.h> 106 #include <machine/metadata.h> 107 #include <machine/reg.h> 108 #include <machine/fpu.h> 109 #include <machine/vmparam.h> 110 #include <machine/elf.h> 111 #include <machine/trap.h> 112 #include <machine/powerpc.h> 113 #include <dev/ofw/openfirm.h> 114 #include <sys/vnode.h> 115 #include <machine/sigframe.h> 116 117 #include <ddb/ddb.h> 118 119 #ifdef DDB 120 extern vm_offset_t ksym_start, ksym_end; 121 #endif 122 123 int cold = 1; 124 125 char pcpu0[PAGE_SIZE]; 126 char uarea0[UAREA_PAGES * PAGE_SIZE]; 127 struct trapframe frame0; 128 129 vm_offset_t kstack0; 130 vm_offset_t kstack0_phys; 131 132 char machine[] = "powerpc"; 133 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 134 135 static char model[128]; 136 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, model, 0, ""); 137 138 static int cacheline_size = CACHELINESIZE; 139 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 140 CTLFLAG_RD, &cacheline_size, 0, ""); 141 142 static void cpu_startup(void *); 143 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL) 144 145 void powerpc_init(u_int, u_int, u_int, void *); 146 147 int save_ofw_mapping(void); 148 int restore_ofw_mapping(void); 149 150 void install_extint(void (*)(void)); 151 152 int setfault(faultbuf); /* defined in locore.S */ 153 154 static int grab_mcontext(struct thread *, mcontext_t *, int); 155 156 void asm_panic(char *); 157 158 long Maxmem = 0; 159 160 struct pmap ofw_pmap; 161 extern int ofmsr; 162 163 struct bat battable[16]; 164 165 struct kva_md_info kmi; 166 167 static void 168 powerpc_ofw_shutdown(void *junk, int howto) 169 { 170 if (howto & RB_HALT) { 171 OF_halt(); 172 } 173 OF_reboot(); 174 } 175 176 static void 177 cpu_startup(void *dummy) 178 { 179 180 /* 181 * Initialise the decrementer-based clock. 182 */ 183 decr_init(); 184 185 /* 186 * Good {morning,afternoon,evening,night}. 187 */ 188 cpu_setup(PCPU_GET(cpuid)); 189 190 /* startrtclock(); */ 191 #ifdef PERFMON 192 perfmon_init(); 193 #endif 194 printf("real memory = %ld (%ld MB)\n", ptoa(Maxmem), 195 ptoa(Maxmem) / 1048576); 196 197 /* 198 * Display any holes after the first chunk of extended memory. 199 */ 200 if (bootverbose) { 201 int indx; 202 203 printf("Physical memory chunk(s):\n"); 204 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 205 int size1 = phys_avail[indx + 1] - phys_avail[indx]; 206 207 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", 208 phys_avail[indx], phys_avail[indx + 1] - 1, size1, 209 size1 / PAGE_SIZE); 210 } 211 } 212 213 vm_ksubmap_init(&kmi); 214 215 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 216 ptoa(cnt.v_free_count) / 1048576); 217 218 /* 219 * Set up buffers, so they can be used to read disk labels. 220 */ 221 bufinit(); 222 vm_pager_bufferinit(); 223 224 EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0, 225 SHUTDOWN_PRI_LAST); 226 227 #ifdef SMP 228 /* 229 * OK, enough kmem_alloc/malloc state should be up, lets get on with it! 230 */ 231 mp_start(); /* fire up the secondaries */ 232 mp_announce(); 233 #endif /* SMP */ 234 } 235 236 extern char kernel_text[], _end[]; 237 238 extern void *trapcode, *trapsize; 239 extern void *alitrap, *alisize; 240 extern void *dsitrap, *dsisize; 241 extern void *decrint, *decrsize; 242 extern void *extint, *extsize; 243 extern void *dblow, *dbsize; 244 245 void 246 powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp) 247 { 248 struct pcpu *pc; 249 vm_offset_t end, off; 250 void *kmdp; 251 252 end = 0; 253 kmdp = NULL; 254 255 /* 256 * Parse metadata if present and fetch parameters. Must be done 257 * before console is inited so cninit gets the right value of 258 * boothowto. 259 */ 260 if (mdp != NULL) { 261 preload_metadata = mdp; 262 kmdp = preload_search_by_type("elf kernel"); 263 if (kmdp != NULL) { 264 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 265 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 266 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 267 #ifdef DDB 268 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 269 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 270 #endif 271 } 272 } 273 274 /* 275 * Init params/tunables that can be overridden by the loader 276 */ 277 init_param1(); 278 279 /* 280 * Start initializing proc0 and thread0. 281 */ 282 proc_linkup(&proc0, &ksegrp0, &kse0, &thread0); 283 proc0.p_uarea = (struct user *)uarea0; 284 proc0.p_stats = &proc0.p_uarea->u_stats; 285 thread0.td_frame = &frame0; 286 287 /* 288 * Set up per-cpu data. 289 */ 290 pc = (struct pcpu *)(pcpu0 + PAGE_SIZE) - 1; 291 pcpu_init(pc, 0, sizeof(struct pcpu)); 292 pc->pc_curthread = &thread0; 293 pc->pc_curpcb = thread0.td_pcb; 294 pc->pc_cpuid = 0; 295 /* pc->pc_mid = mid; */ 296 297 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 298 299 mutex_init(); 300 301 /* 302 * Initialize the console before printing anything. 303 */ 304 cninit(); 305 306 /* 307 * Complain if there is no metadata. 308 */ 309 if (mdp == NULL || kmdp == NULL) { 310 printf("powerpc_init: no loader metadata.\n"); 311 } 312 313 kdb_init(); 314 315 /* 316 * XXX: Initialize the interrupt tables. 317 * Disable translation in case the vector area 318 * hasn't been mapped (G5) 319 */ 320 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR)); 321 isync(); 322 bcopy(&trapcode, (void *)EXC_RST, (size_t)&trapsize); 323 bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize); 324 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); 325 bcopy(&trapcode, (void *)EXC_ISI, (size_t)&trapsize); 326 bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize); 327 bcopy(&trapcode, (void *)EXC_ALI, (size_t)&trapsize); 328 bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize); 329 bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize); 330 bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize); 331 bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize); 332 bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize); 333 bcopy(&trapcode, (void *)EXC_FPA, (size_t)&trapsize); 334 bcopy(&trapcode, (void *)EXC_THRM, (size_t)&trapsize); 335 bcopy(&trapcode, (void *)EXC_BPT, (size_t)&trapsize); 336 #ifdef KDB 337 bcopy(&dblow, (void *)EXC_RST, (size_t)&dbsize); 338 bcopy(&dblow, (void *)EXC_MCHK, (size_t)&dbsize); 339 bcopy(&dblow, (void *)EXC_PGM, (size_t)&dbsize); 340 bcopy(&dblow, (void *)EXC_TRC, (size_t)&dbsize); 341 bcopy(&dblow, (void *)EXC_BPT, (size_t)&dbsize); 342 #endif 343 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 344 345 /* 346 * Make sure translation has been enabled 347 */ 348 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI); 349 isync(); 350 351 /* 352 * Initialise virtual memory. 353 */ 354 pmap_bootstrap(startkernel, endkernel); 355 356 /* 357 * Initialize params/tunables that are derived from memsize 358 */ 359 init_param2(physmem); 360 361 /* 362 * Finish setting up thread0. 363 */ 364 thread0.td_kstack = kstack0; 365 thread0.td_pcb = (struct pcb *) 366 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 367 368 /* 369 * Map and initialise the message buffer. 370 */ 371 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 372 pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off); 373 msgbufinit(msgbufp, MSGBUF_SIZE); 374 375 #ifdef KDB 376 if (boothowto & RB_KDB) 377 kdb_enter("Boot flags requested debugger"); 378 #endif 379 } 380 381 void 382 bzero(void *buf, size_t len) 383 { 384 caddr_t p; 385 386 p = buf; 387 388 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 389 *p++ = 0; 390 len--; 391 } 392 393 while (len >= sizeof(u_long) * 8) { 394 *(u_long*) p = 0; 395 *((u_long*) p + 1) = 0; 396 *((u_long*) p + 2) = 0; 397 *((u_long*) p + 3) = 0; 398 len -= sizeof(u_long) * 8; 399 *((u_long*) p + 4) = 0; 400 *((u_long*) p + 5) = 0; 401 *((u_long*) p + 6) = 0; 402 *((u_long*) p + 7) = 0; 403 p += sizeof(u_long) * 8; 404 } 405 406 while (len >= sizeof(u_long)) { 407 *(u_long*) p = 0; 408 len -= sizeof(u_long); 409 p += sizeof(u_long); 410 } 411 412 while (len) { 413 *p++ = 0; 414 len--; 415 } 416 } 417 418 void 419 sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code) 420 { 421 struct trapframe *tf; 422 struct sigframe *sfp; 423 struct sigacts *psp; 424 struct sigframe sf; 425 struct thread *td; 426 struct proc *p; 427 int oonstack, rndfsize; 428 429 td = curthread; 430 p = td->td_proc; 431 PROC_LOCK_ASSERT(p, MA_OWNED); 432 psp = p->p_sigacts; 433 mtx_assert(&psp->ps_mtx, MA_OWNED); 434 tf = td->td_frame; 435 oonstack = sigonstack(tf->fixreg[1]); 436 437 rndfsize = ((sizeof(sf) + 15) / 16) * 16; 438 439 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 440 catcher, sig); 441 442 /* 443 * Save user context 444 */ 445 memset(&sf, 0, sizeof(sf)); 446 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 447 sf.sf_uc.uc_sigmask = *mask; 448 sf.sf_uc.uc_stack = td->td_sigstk; 449 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 450 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 451 452 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 453 454 /* 455 * Allocate and validate space for the signal handler context. 456 */ 457 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 458 SIGISMEMBER(psp->ps_sigonstack, sig)) { 459 sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp + 460 td->td_sigstk.ss_size - rndfsize); 461 } else { 462 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); 463 } 464 465 /* 466 * Translate the signal if appropriate (Linux emu ?) 467 */ 468 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 469 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 470 471 /* 472 * Save the floating-point state, if necessary, then copy it. 473 */ 474 /* XXX */ 475 476 /* 477 * Set up the registers to return to sigcode. 478 * 479 * r1/sp - sigframe ptr 480 * lr - sig function, dispatched to by blrl in trampoline 481 * r3 - sig number 482 * r4 - SIGINFO ? &siginfo : exception code 483 * r5 - user context 484 * srr0 - trampoline function addr 485 */ 486 tf->lr = (register_t)catcher; 487 tf->fixreg[1] = (register_t)sfp; 488 tf->fixreg[FIRSTARG] = sig; 489 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; 490 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 491 /* 492 * Signal handler installed with SA_SIGINFO. 493 */ 494 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; 495 496 /* 497 * Fill siginfo structure. 498 */ 499 sf.sf_si.si_signo = sig; 500 sf.sf_si.si_code = code; 501 sf.sf_si.si_addr = (void *)tf->srr0; 502 } else { 503 /* Old FreeBSD-style arguments. */ 504 tf->fixreg[FIRSTARG+1] = code; 505 } 506 mtx_unlock(&psp->ps_mtx); 507 PROC_UNLOCK(p); 508 509 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 510 511 /* 512 * copy the frame out to userland. 513 */ 514 if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) { 515 /* 516 * Process has trashed its stack. Kill it. 517 */ 518 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 519 PROC_LOCK(p); 520 sigexit(td, SIGILL); 521 } 522 523 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, 524 tf->srr0, tf->fixreg[1]); 525 526 PROC_LOCK(p); 527 mtx_lock(&psp->ps_mtx); 528 } 529 530 /* 531 * Build siginfo_t for SA thread 532 */ 533 void 534 cpu_thread_siginfo(int sig, u_long code, siginfo_t *si) 535 { 536 struct proc *p; 537 struct thread *td; 538 539 td = curthread; 540 p = td->td_proc; 541 PROC_LOCK_ASSERT(p, MA_OWNED); 542 543 bzero(si, sizeof(*si)); 544 si->si_signo = sig; 545 si->si_code = code; 546 /* XXXKSE fill other fields */ 547 } 548 549 int 550 sigreturn(struct thread *td, struct sigreturn_args *uap) 551 { 552 struct proc *p; 553 ucontext_t uc; 554 int error; 555 556 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 557 558 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 559 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 560 return (EFAULT); 561 } 562 563 error = set_mcontext(td, &uc.uc_mcontext); 564 if (error != 0) 565 return (error); 566 567 p = td->td_proc; 568 PROC_LOCK(p); 569 td->td_sigmask = uc.uc_sigmask; 570 SIG_CANTMASK(td->td_sigmask); 571 signotify(td); 572 PROC_UNLOCK(p); 573 574 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", 575 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); 576 577 return (EJUSTRETURN); 578 } 579 580 #ifdef COMPAT_FREEBSD4 581 int 582 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 583 { 584 585 return sigreturn(td, (struct sigreturn_args *)uap); 586 } 587 #endif 588 589 /* 590 * Construct a PCB from a trapframe. This is called from kdb_trap() where 591 * we want to start a backtrace from the function that caused us to enter 592 * the debugger. We have the context in the trapframe, but base the trace 593 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 594 * enough for a backtrace. 595 */ 596 void 597 makectx(struct trapframe *tf, struct pcb *pcb) 598 { 599 600 pcb->pcb_lr = tf->srr0; 601 pcb->pcb_sp = tf->fixreg[1]; 602 } 603 604 /* 605 * get_mcontext/sendsig helper routine that doesn't touch the 606 * proc lock 607 */ 608 static int 609 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags) 610 { 611 struct pcb *pcb; 612 613 pcb = td->td_pcb; 614 615 memset(mcp, 0, sizeof(mcontext_t)); 616 617 mcp->mc_vers = _MC_VERSION; 618 mcp->mc_flags = 0; 619 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe)); 620 if (flags & GET_MC_CLEAR_RET) { 621 mcp->mc_gpr[3] = 0; 622 mcp->mc_gpr[4] = 0; 623 } 624 625 /* 626 * This assumes that floating-point context is *not* lazy, 627 * so if the thread has used FP there would have been a 628 * FP-unavailable exception that would have set things up 629 * correctly. 630 */ 631 if (pcb->pcb_flags & PCB_FPU) { 632 KASSERT(td == curthread, 633 ("get_mcontext: fp save not curthread")); 634 critical_enter(); 635 save_fpu(td); 636 critical_exit(); 637 mcp->mc_flags |= _MC_FP_VALID; 638 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double)); 639 memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double)); 640 } 641 642 /* XXX Altivec context ? */ 643 644 mcp->mc_len = sizeof(*mcp); 645 646 return (0); 647 } 648 649 int 650 get_mcontext(struct thread *td, mcontext_t *mcp, int flags) 651 { 652 int error; 653 654 error = grab_mcontext(td, mcp, flags); 655 if (error == 0) { 656 PROC_LOCK(curthread->td_proc); 657 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]); 658 PROC_UNLOCK(curthread->td_proc); 659 } 660 661 return (error); 662 } 663 664 int 665 set_mcontext(struct thread *td, const mcontext_t *mcp) 666 { 667 struct pcb *pcb; 668 struct trapframe *tf; 669 670 pcb = td->td_pcb; 671 tf = td->td_frame; 672 673 if (mcp->mc_vers != _MC_VERSION || 674 mcp->mc_len != sizeof(*mcp)) 675 return (EINVAL); 676 677 /* 678 * Don't let the user set privileged MSR bits 679 */ 680 if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) { 681 return (EINVAL); 682 } 683 684 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame)); 685 686 if (mcp->mc_flags & _MC_FP_VALID) { 687 if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) { 688 critical_enter(); 689 enable_fpu(td); 690 critical_exit(); 691 } 692 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double)); 693 memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double)); 694 } 695 696 /* XXX Altivec context? */ 697 698 return (0); 699 } 700 701 void 702 cpu_boot(int howto) 703 { 704 } 705 706 /* 707 * Shutdown the CPU as much as possible. 708 */ 709 void 710 cpu_halt(void) 711 { 712 713 OF_exit(); 714 } 715 716 void 717 cpu_idle(void) 718 { 719 /* Insert code to halt (until next interrupt) for the idle loop */ 720 } 721 722 /* 723 * Set set up registers on exec. 724 */ 725 void 726 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 727 { 728 struct trapframe *tf; 729 struct ps_strings arginfo; 730 731 tf = trapframe(td); 732 bzero(tf, sizeof *tf); 733 tf->fixreg[1] = -roundup(-stack + 8, 16); 734 735 /* 736 * XXX Machine-independent code has already copied arguments and 737 * XXX environment to userland. Get them back here. 738 */ 739 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); 740 741 /* 742 * Set up arguments for _start(): 743 * _start(argc, argv, envp, obj, cleanup, ps_strings); 744 * 745 * Notes: 746 * - obj and cleanup are the auxilliary and termination 747 * vectors. They are fixed up by ld.elf_so. 748 * - ps_strings is a NetBSD extention, and will be 749 * ignored by executables which are strictly 750 * compliant with the SVR4 ABI. 751 * 752 * XXX We have to set both regs and retval here due to different 753 * XXX calling convention in trap.c and init_main.c. 754 */ 755 /* 756 * XXX PG: these get overwritten in the syscall return code. 757 * execve() should return EJUSTRETURN, like it does on NetBSD. 758 * Emulate by setting the syscall return value cells. The 759 * registers still have to be set for init's fork trampoline. 760 */ 761 td->td_retval[0] = arginfo.ps_nargvstr; 762 td->td_retval[1] = (register_t)arginfo.ps_argvstr; 763 tf->fixreg[3] = arginfo.ps_nargvstr; 764 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 765 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 766 tf->fixreg[6] = 0; /* auxillary vector */ 767 tf->fixreg[7] = 0; /* termination vector */ 768 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 769 770 tf->srr0 = entry; 771 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; 772 td->td_pcb->pcb_flags = 0; 773 } 774 775 int 776 fill_regs(struct thread *td, struct reg *regs) 777 { 778 struct trapframe *tf; 779 780 tf = td->td_frame; 781 memcpy(regs, tf, sizeof(struct reg)); 782 783 return (0); 784 } 785 786 int 787 fill_dbregs(struct thread *td, struct dbreg *dbregs) 788 { 789 /* No debug registers on PowerPC */ 790 return (ENOSYS); 791 } 792 793 int 794 fill_fpregs(struct thread *td, struct fpreg *fpregs) 795 { 796 struct pcb *pcb; 797 798 pcb = td->td_pcb; 799 800 if ((pcb->pcb_flags & PCB_FPU) == 0) 801 memset(fpregs, 0, sizeof(struct fpreg)); 802 else 803 memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg)); 804 805 return (0); 806 } 807 808 int 809 set_regs(struct thread *td, struct reg *regs) 810 { 811 struct trapframe *tf; 812 813 tf = td->td_frame; 814 memcpy(tf, regs, sizeof(struct reg)); 815 816 return (0); 817 } 818 819 int 820 set_dbregs(struct thread *td, struct dbreg *dbregs) 821 { 822 /* No debug registers on PowerPC */ 823 return (ENOSYS); 824 } 825 826 int 827 set_fpregs(struct thread *td, struct fpreg *fpregs) 828 { 829 struct pcb *pcb; 830 831 pcb = td->td_pcb; 832 if ((pcb->pcb_flags & PCB_FPU) == 0) 833 enable_fpu(td); 834 memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg)); 835 836 return (0); 837 } 838 839 int 840 ptrace_set_pc(struct thread *td, unsigned long addr) 841 { 842 struct trapframe *tf; 843 844 tf = td->td_frame; 845 tf->srr0 = (register_t)addr; 846 847 return (0); 848 } 849 850 int 851 ptrace_single_step(struct thread *td) 852 { 853 struct trapframe *tf; 854 855 tf = td->td_frame; 856 tf->srr1 |= PSL_SE; 857 858 return (0); 859 } 860 861 int 862 ptrace_clear_single_step(struct thread *td) 863 { 864 struct trapframe *tf; 865 866 tf = td->td_frame; 867 tf->srr1 &= ~PSL_SE; 868 869 return (0); 870 } 871 872 /* 873 * Initialise a struct pcpu. 874 */ 875 void 876 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 877 { 878 879 } 880 881 /* 882 * kcopy(const void *src, void *dst, size_t len); 883 * 884 * Copy len bytes from src to dst, aborting if we encounter a fatal 885 * page fault. 886 * 887 * kcopy() _must_ save and restore the old fault handler since it is 888 * called by uiomove(), which may be in the path of servicing a non-fatal 889 * page fault. 890 */ 891 int 892 kcopy(const void *src, void *dst, size_t len) 893 { 894 struct thread *td; 895 faultbuf env, *oldfault; 896 int rv; 897 898 td = PCPU_GET(curthread); 899 oldfault = td->td_pcb->pcb_onfault; 900 if ((rv = setfault(env)) != 0) { 901 td->td_pcb->pcb_onfault = oldfault; 902 return rv; 903 } 904 905 memcpy(dst, src, len); 906 907 td->td_pcb->pcb_onfault = oldfault; 908 return (0); 909 } 910 911 void 912 asm_panic(char *pstr) 913 { 914 panic(pstr); 915 } 916 917 int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */ 918 919 int 920 db_trap_glue(struct trapframe *frame) 921 { 922 if (!(frame->srr1 & PSL_PR) 923 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC 924 || (frame->exc == EXC_PGM 925 && (frame->srr1 & 0x20000)) 926 || frame->exc == EXC_BPT 927 || frame->exc == EXC_DSI)) { 928 int type = frame->exc; 929 if (type == EXC_PGM && (frame->srr1 & 0x20000)) { 930 type = T_BREAKPOINT; 931 } 932 return (kdb_trap(type, 0, frame)); 933 } 934 935 return (0); 936 } 937