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/proc.h> 67 #include <sys/systm.h> 68 #include <sys/bio.h> 69 #include <sys/buf.h> 70 #include <sys/bus.h> 71 #include <sys/cons.h> 72 #include <sys/cpu.h> 73 #include <sys/eventhandler.h> 74 #include <sys/exec.h> 75 #include <sys/imgact.h> 76 #include <sys/kdb.h> 77 #include <sys/kernel.h> 78 #include <sys/ktr.h> 79 #include <sys/linker.h> 80 #include <sys/lock.h> 81 #include <sys/malloc.h> 82 #include <sys/mbuf.h> 83 #include <sys/msgbuf.h> 84 #include <sys/mutex.h> 85 #include <sys/ptrace.h> 86 #include <sys/reboot.h> 87 #include <sys/signalvar.h> 88 #include <sys/sysctl.h> 89 #include <sys/sysent.h> 90 #include <sys/sysproto.h> 91 #include <sys/ucontext.h> 92 #include <sys/uio.h> 93 #include <sys/vmmeter.h> 94 #include <sys/vnode.h> 95 96 #include <net/netisr.h> 97 98 #include <vm/vm.h> 99 #include <vm/vm_extern.h> 100 #include <vm/vm_kern.h> 101 #include <vm/vm_page.h> 102 #include <vm/vm_map.h> 103 #include <vm/vm_object.h> 104 #include <vm/vm_pager.h> 105 106 #include <machine/bat.h> 107 #include <machine/clock.h> 108 #include <machine/cpu.h> 109 #include <machine/elf.h> 110 #include <machine/fpu.h> 111 #include <machine/md_var.h> 112 #include <machine/metadata.h> 113 #include <machine/pcb.h> 114 #include <machine/powerpc.h> 115 #include <machine/reg.h> 116 #include <machine/sigframe.h> 117 #include <machine/trap.h> 118 #include <machine/vmparam.h> 119 120 #include <ddb/ddb.h> 121 122 #include <dev/ofw/openfirm.h> 123 124 #ifdef DDB 125 extern vm_offset_t ksym_start, ksym_end; 126 #endif 127 128 int cold = 1; 129 130 char pcpu0[PAGE_SIZE]; 131 struct trapframe frame0; 132 133 vm_offset_t kstack0; 134 vm_offset_t kstack0_phys; 135 136 char machine[] = "powerpc"; 137 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 138 139 static char model[128]; 140 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, model, 0, ""); 141 142 static int cacheline_size = CACHELINESIZE; 143 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 144 CTLFLAG_RD, &cacheline_size, 0, ""); 145 146 static void cpu_startup(void *); 147 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL) 148 149 void powerpc_init(u_int, u_int, u_int, void *); 150 151 int save_ofw_mapping(void); 152 int restore_ofw_mapping(void); 153 154 void install_extint(void (*)(void)); 155 156 int setfault(faultbuf); /* defined in locore.S */ 157 158 static int grab_mcontext(struct thread *, mcontext_t *, int); 159 160 void asm_panic(char *); 161 162 long Maxmem = 0; 163 164 struct pmap ofw_pmap; 165 extern int ofmsr; 166 167 struct bat battable[16]; 168 169 struct kva_md_info kmi; 170 171 static void 172 powerpc_ofw_shutdown(void *junk, int howto) 173 { 174 if (howto & RB_HALT) { 175 OF_halt(); 176 } 177 OF_reboot(); 178 } 179 180 static void 181 cpu_startup(void *dummy) 182 { 183 184 /* 185 * Initialise the decrementer-based clock. 186 */ 187 decr_init(); 188 189 /* 190 * Good {morning,afternoon,evening,night}. 191 */ 192 cpu_setup(PCPU_GET(cpuid)); 193 194 /* startrtclock(); */ 195 #ifdef PERFMON 196 perfmon_init(); 197 #endif 198 printf("real memory = %ld (%ld MB)\n", ptoa(Maxmem), 199 ptoa(Maxmem) / 1048576); 200 201 /* 202 * Display any holes after the first chunk of extended memory. 203 */ 204 if (bootverbose) { 205 int indx; 206 207 printf("Physical memory chunk(s):\n"); 208 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 209 int size1 = phys_avail[indx + 1] - phys_avail[indx]; 210 211 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", 212 phys_avail[indx], phys_avail[indx + 1] - 1, size1, 213 size1 / PAGE_SIZE); 214 } 215 } 216 217 vm_ksubmap_init(&kmi); 218 219 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 220 ptoa(cnt.v_free_count) / 1048576); 221 222 /* 223 * Set up buffers, so they can be used to read disk labels. 224 */ 225 bufinit(); 226 vm_pager_bufferinit(); 227 228 EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0, 229 SHUTDOWN_PRI_LAST); 230 231 #ifdef SMP 232 /* 233 * OK, enough kmem_alloc/malloc state should be up, lets get on with it! 234 */ 235 mp_start(); /* fire up the secondaries */ 236 mp_announce(); 237 #endif /* SMP */ 238 } 239 240 extern char kernel_text[], _end[]; 241 242 extern void *trapcode, *trapsize; 243 extern void *alitrap, *alisize; 244 extern void *dsitrap, *dsisize; 245 extern void *decrint, *decrsize; 246 extern void *extint, *extsize; 247 extern void *dblow, *dbsize; 248 249 void 250 powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp) 251 { 252 struct pcpu *pc; 253 vm_offset_t end, off; 254 void *kmdp; 255 256 end = 0; 257 kmdp = NULL; 258 259 /* 260 * Parse metadata if present and fetch parameters. Must be done 261 * before console is inited so cninit gets the right value of 262 * boothowto. 263 */ 264 if (mdp != NULL) { 265 preload_metadata = mdp; 266 kmdp = preload_search_by_type("elf kernel"); 267 if (kmdp != NULL) { 268 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 269 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 270 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 271 #ifdef DDB 272 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 273 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 274 #endif 275 } 276 } 277 278 /* 279 * Init params/tunables that can be overridden by the loader 280 */ 281 init_param1(); 282 283 /* 284 * Start initializing proc0 and thread0. 285 */ 286 proc_linkup(&proc0, &ksegrp0, &thread0); 287 thread0.td_frame = &frame0; 288 289 /* 290 * Set up per-cpu data. 291 */ 292 pc = (struct pcpu *)(pcpu0 + PAGE_SIZE) - 1; 293 pcpu_init(pc, 0, sizeof(struct pcpu)); 294 pc->pc_curthread = &thread0; 295 pc->pc_curpcb = thread0.td_pcb; 296 pc->pc_cpuid = 0; 297 /* pc->pc_mid = mid; */ 298 299 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 300 301 mutex_init(); 302 303 /* 304 * Initialize the console before printing anything. 305 */ 306 cninit(); 307 308 /* 309 * Complain if there is no metadata. 310 */ 311 if (mdp == NULL || kmdp == NULL) { 312 printf("powerpc_init: no loader metadata.\n"); 313 } 314 315 kdb_init(); 316 317 /* 318 * XXX: Initialize the interrupt tables. 319 * Disable translation in case the vector area 320 * hasn't been mapped (G5) 321 */ 322 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR)); 323 isync(); 324 bcopy(&trapcode, (void *)EXC_RST, (size_t)&trapsize); 325 bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize); 326 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); 327 bcopy(&trapcode, (void *)EXC_ISI, (size_t)&trapsize); 328 bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize); 329 bcopy(&trapcode, (void *)EXC_ALI, (size_t)&trapsize); 330 bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize); 331 bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize); 332 bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize); 333 bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize); 334 bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize); 335 bcopy(&trapcode, (void *)EXC_FPA, (size_t)&trapsize); 336 bcopy(&trapcode, (void *)EXC_THRM, (size_t)&trapsize); 337 bcopy(&trapcode, (void *)EXC_BPT, (size_t)&trapsize); 338 #ifdef KDB 339 bcopy(&dblow, (void *)EXC_RST, (size_t)&dbsize); 340 bcopy(&dblow, (void *)EXC_MCHK, (size_t)&dbsize); 341 bcopy(&dblow, (void *)EXC_PGM, (size_t)&dbsize); 342 bcopy(&dblow, (void *)EXC_TRC, (size_t)&dbsize); 343 bcopy(&dblow, (void *)EXC_BPT, (size_t)&dbsize); 344 #endif 345 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 346 347 /* 348 * Make sure translation has been enabled 349 */ 350 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI); 351 isync(); 352 353 /* 354 * Initialise virtual memory. 355 */ 356 pmap_bootstrap(startkernel, endkernel); 357 358 /* 359 * Initialize params/tunables that are derived from memsize 360 */ 361 init_param2(physmem); 362 363 /* 364 * Finish setting up thread0. 365 */ 366 thread0.td_kstack = kstack0; 367 thread0.td_pcb = (struct pcb *) 368 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 369 370 /* 371 * Map and initialise the message buffer. 372 */ 373 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 374 pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off); 375 msgbufinit(msgbufp, MSGBUF_SIZE); 376 377 #ifdef KDB 378 if (boothowto & RB_KDB) 379 kdb_enter("Boot flags requested debugger"); 380 #endif 381 } 382 383 void 384 bzero(void *buf, size_t len) 385 { 386 caddr_t p; 387 388 p = buf; 389 390 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 391 *p++ = 0; 392 len--; 393 } 394 395 while (len >= sizeof(u_long) * 8) { 396 *(u_long*) p = 0; 397 *((u_long*) p + 1) = 0; 398 *((u_long*) p + 2) = 0; 399 *((u_long*) p + 3) = 0; 400 len -= sizeof(u_long) * 8; 401 *((u_long*) p + 4) = 0; 402 *((u_long*) p + 5) = 0; 403 *((u_long*) p + 6) = 0; 404 *((u_long*) p + 7) = 0; 405 p += sizeof(u_long) * 8; 406 } 407 408 while (len >= sizeof(u_long)) { 409 *(u_long*) p = 0; 410 len -= sizeof(u_long); 411 p += sizeof(u_long); 412 } 413 414 while (len) { 415 *p++ = 0; 416 len--; 417 } 418 } 419 420 void 421 sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code) 422 { 423 struct trapframe *tf; 424 struct sigframe *sfp; 425 struct sigacts *psp; 426 struct sigframe sf; 427 struct thread *td; 428 struct proc *p; 429 int oonstack, rndfsize; 430 431 td = curthread; 432 p = td->td_proc; 433 PROC_LOCK_ASSERT(p, MA_OWNED); 434 psp = p->p_sigacts; 435 mtx_assert(&psp->ps_mtx, MA_OWNED); 436 tf = td->td_frame; 437 oonstack = sigonstack(tf->fixreg[1]); 438 439 rndfsize = ((sizeof(sf) + 15) / 16) * 16; 440 441 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 442 catcher, sig); 443 444 /* 445 * Save user context 446 */ 447 memset(&sf, 0, sizeof(sf)); 448 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 449 sf.sf_uc.uc_sigmask = *mask; 450 sf.sf_uc.uc_stack = td->td_sigstk; 451 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 452 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 453 454 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 455 456 /* 457 * Allocate and validate space for the signal handler context. 458 */ 459 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 460 SIGISMEMBER(psp->ps_sigonstack, sig)) { 461 sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp + 462 td->td_sigstk.ss_size - rndfsize); 463 } else { 464 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); 465 } 466 467 /* 468 * Translate the signal if appropriate (Linux emu ?) 469 */ 470 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 471 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 472 473 /* 474 * Save the floating-point state, if necessary, then copy it. 475 */ 476 /* XXX */ 477 478 /* 479 * Set up the registers to return to sigcode. 480 * 481 * r1/sp - sigframe ptr 482 * lr - sig function, dispatched to by blrl in trampoline 483 * r3 - sig number 484 * r4 - SIGINFO ? &siginfo : exception code 485 * r5 - user context 486 * srr0 - trampoline function addr 487 */ 488 tf->lr = (register_t)catcher; 489 tf->fixreg[1] = (register_t)sfp; 490 tf->fixreg[FIRSTARG] = sig; 491 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; 492 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 493 /* 494 * Signal handler installed with SA_SIGINFO. 495 */ 496 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; 497 498 /* 499 * Fill siginfo structure. 500 */ 501 sf.sf_si.si_signo = sig; 502 sf.sf_si.si_code = code; 503 sf.sf_si.si_addr = (void *)tf->srr0; 504 } else { 505 /* Old FreeBSD-style arguments. */ 506 tf->fixreg[FIRSTARG+1] = code; 507 } 508 mtx_unlock(&psp->ps_mtx); 509 PROC_UNLOCK(p); 510 511 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 512 513 /* 514 * copy the frame out to userland. 515 */ 516 if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) { 517 /* 518 * Process has trashed its stack. Kill it. 519 */ 520 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 521 PROC_LOCK(p); 522 sigexit(td, SIGILL); 523 } 524 525 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, 526 tf->srr0, tf->fixreg[1]); 527 528 PROC_LOCK(p); 529 mtx_lock(&psp->ps_mtx); 530 } 531 532 /* 533 * Build siginfo_t for SA thread 534 */ 535 void 536 cpu_thread_siginfo(int sig, u_long code, siginfo_t *si) 537 { 538 struct proc *p; 539 struct thread *td; 540 541 td = curthread; 542 p = td->td_proc; 543 PROC_LOCK_ASSERT(p, MA_OWNED); 544 545 bzero(si, sizeof(*si)); 546 si->si_signo = sig; 547 si->si_code = code; 548 /* XXXKSE fill other fields */ 549 } 550 551 int 552 sigreturn(struct thread *td, struct sigreturn_args *uap) 553 { 554 struct proc *p; 555 ucontext_t uc; 556 int error; 557 558 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 559 560 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 561 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 562 return (EFAULT); 563 } 564 565 error = set_mcontext(td, &uc.uc_mcontext); 566 if (error != 0) 567 return (error); 568 569 p = td->td_proc; 570 PROC_LOCK(p); 571 td->td_sigmask = uc.uc_sigmask; 572 SIG_CANTMASK(td->td_sigmask); 573 signotify(td); 574 PROC_UNLOCK(p); 575 576 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", 577 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); 578 579 return (EJUSTRETURN); 580 } 581 582 #ifdef COMPAT_FREEBSD4 583 int 584 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 585 { 586 587 return sigreturn(td, (struct sigreturn_args *)uap); 588 } 589 #endif 590 591 /* 592 * Construct a PCB from a trapframe. This is called from kdb_trap() where 593 * we want to start a backtrace from the function that caused us to enter 594 * the debugger. We have the context in the trapframe, but base the trace 595 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 596 * enough for a backtrace. 597 */ 598 void 599 makectx(struct trapframe *tf, struct pcb *pcb) 600 { 601 602 pcb->pcb_lr = tf->srr0; 603 pcb->pcb_sp = tf->fixreg[1]; 604 } 605 606 /* 607 * get_mcontext/sendsig helper routine that doesn't touch the 608 * proc lock 609 */ 610 static int 611 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags) 612 { 613 struct pcb *pcb; 614 615 pcb = td->td_pcb; 616 617 memset(mcp, 0, sizeof(mcontext_t)); 618 619 mcp->mc_vers = _MC_VERSION; 620 mcp->mc_flags = 0; 621 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe)); 622 if (flags & GET_MC_CLEAR_RET) { 623 mcp->mc_gpr[3] = 0; 624 mcp->mc_gpr[4] = 0; 625 } 626 627 /* 628 * This assumes that floating-point context is *not* lazy, 629 * so if the thread has used FP there would have been a 630 * FP-unavailable exception that would have set things up 631 * correctly. 632 */ 633 if (pcb->pcb_flags & PCB_FPU) { 634 KASSERT(td == curthread, 635 ("get_mcontext: fp save not curthread")); 636 critical_enter(); 637 save_fpu(td); 638 critical_exit(); 639 mcp->mc_flags |= _MC_FP_VALID; 640 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double)); 641 memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double)); 642 } 643 644 /* XXX Altivec context ? */ 645 646 mcp->mc_len = sizeof(*mcp); 647 648 return (0); 649 } 650 651 int 652 get_mcontext(struct thread *td, mcontext_t *mcp, int flags) 653 { 654 int error; 655 656 error = grab_mcontext(td, mcp, flags); 657 if (error == 0) { 658 PROC_LOCK(curthread->td_proc); 659 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]); 660 PROC_UNLOCK(curthread->td_proc); 661 } 662 663 return (error); 664 } 665 666 int 667 set_mcontext(struct thread *td, const mcontext_t *mcp) 668 { 669 struct pcb *pcb; 670 struct trapframe *tf; 671 672 pcb = td->td_pcb; 673 tf = td->td_frame; 674 675 if (mcp->mc_vers != _MC_VERSION || 676 mcp->mc_len != sizeof(*mcp)) 677 return (EINVAL); 678 679 /* 680 * Don't let the user set privileged MSR bits 681 */ 682 if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) { 683 return (EINVAL); 684 } 685 686 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame)); 687 688 if (mcp->mc_flags & _MC_FP_VALID) { 689 if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) { 690 critical_enter(); 691 enable_fpu(td); 692 critical_exit(); 693 } 694 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double)); 695 memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double)); 696 } 697 698 /* XXX Altivec context? */ 699 700 return (0); 701 } 702 703 void 704 cpu_boot(int howto) 705 { 706 } 707 708 /* Get current clock frequency for the given cpu id. */ 709 int 710 cpu_est_clockrate(int cpu_id, uint64_t *rate) 711 { 712 713 return (ENXIO); 714 } 715 716 /* 717 * Shutdown the CPU as much as possible. 718 */ 719 void 720 cpu_halt(void) 721 { 722 723 OF_exit(); 724 } 725 726 void 727 cpu_idle(void) 728 { 729 /* Insert code to halt (until next interrupt) for the idle loop */ 730 } 731 732 /* 733 * Set set up registers on exec. 734 */ 735 void 736 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 737 { 738 struct trapframe *tf; 739 struct ps_strings arginfo; 740 741 tf = trapframe(td); 742 bzero(tf, sizeof *tf); 743 tf->fixreg[1] = -roundup(-stack + 8, 16); 744 745 /* 746 * XXX Machine-independent code has already copied arguments and 747 * XXX environment to userland. Get them back here. 748 */ 749 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); 750 751 /* 752 * Set up arguments for _start(): 753 * _start(argc, argv, envp, obj, cleanup, ps_strings); 754 * 755 * Notes: 756 * - obj and cleanup are the auxilliary and termination 757 * vectors. They are fixed up by ld.elf_so. 758 * - ps_strings is a NetBSD extention, and will be 759 * ignored by executables which are strictly 760 * compliant with the SVR4 ABI. 761 * 762 * XXX We have to set both regs and retval here due to different 763 * XXX calling convention in trap.c and init_main.c. 764 */ 765 /* 766 * XXX PG: these get overwritten in the syscall return code. 767 * execve() should return EJUSTRETURN, like it does on NetBSD. 768 * Emulate by setting the syscall return value cells. The 769 * registers still have to be set for init's fork trampoline. 770 */ 771 td->td_retval[0] = arginfo.ps_nargvstr; 772 td->td_retval[1] = (register_t)arginfo.ps_argvstr; 773 tf->fixreg[3] = arginfo.ps_nargvstr; 774 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 775 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 776 tf->fixreg[6] = 0; /* auxillary vector */ 777 tf->fixreg[7] = 0; /* termination vector */ 778 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 779 780 tf->srr0 = entry; 781 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; 782 td->td_pcb->pcb_flags = 0; 783 } 784 785 int 786 fill_regs(struct thread *td, struct reg *regs) 787 { 788 struct trapframe *tf; 789 790 tf = td->td_frame; 791 memcpy(regs, tf, sizeof(struct reg)); 792 793 return (0); 794 } 795 796 int 797 fill_dbregs(struct thread *td, struct dbreg *dbregs) 798 { 799 /* No debug registers on PowerPC */ 800 return (ENOSYS); 801 } 802 803 int 804 fill_fpregs(struct thread *td, struct fpreg *fpregs) 805 { 806 struct pcb *pcb; 807 808 pcb = td->td_pcb; 809 810 if ((pcb->pcb_flags & PCB_FPU) == 0) 811 memset(fpregs, 0, sizeof(struct fpreg)); 812 else 813 memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg)); 814 815 return (0); 816 } 817 818 int 819 set_regs(struct thread *td, struct reg *regs) 820 { 821 struct trapframe *tf; 822 823 tf = td->td_frame; 824 memcpy(tf, regs, sizeof(struct reg)); 825 826 return (0); 827 } 828 829 int 830 set_dbregs(struct thread *td, struct dbreg *dbregs) 831 { 832 /* No debug registers on PowerPC */ 833 return (ENOSYS); 834 } 835 836 int 837 set_fpregs(struct thread *td, struct fpreg *fpregs) 838 { 839 struct pcb *pcb; 840 841 pcb = td->td_pcb; 842 if ((pcb->pcb_flags & PCB_FPU) == 0) 843 enable_fpu(td); 844 memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg)); 845 846 return (0); 847 } 848 849 int 850 ptrace_set_pc(struct thread *td, unsigned long addr) 851 { 852 struct trapframe *tf; 853 854 tf = td->td_frame; 855 tf->srr0 = (register_t)addr; 856 857 return (0); 858 } 859 860 int 861 ptrace_single_step(struct thread *td) 862 { 863 struct trapframe *tf; 864 865 tf = td->td_frame; 866 tf->srr1 |= PSL_SE; 867 868 return (0); 869 } 870 871 int 872 ptrace_clear_single_step(struct thread *td) 873 { 874 struct trapframe *tf; 875 876 tf = td->td_frame; 877 tf->srr1 &= ~PSL_SE; 878 879 return (0); 880 } 881 882 /* 883 * Initialise a struct pcpu. 884 */ 885 void 886 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 887 { 888 889 } 890 891 /* 892 * kcopy(const void *src, void *dst, size_t len); 893 * 894 * Copy len bytes from src to dst, aborting if we encounter a fatal 895 * page fault. 896 * 897 * kcopy() _must_ save and restore the old fault handler since it is 898 * called by uiomove(), which may be in the path of servicing a non-fatal 899 * page fault. 900 */ 901 int 902 kcopy(const void *src, void *dst, size_t len) 903 { 904 struct thread *td; 905 faultbuf env, *oldfault; 906 int rv; 907 908 td = PCPU_GET(curthread); 909 oldfault = td->td_pcb->pcb_onfault; 910 if ((rv = setfault(env)) != 0) { 911 td->td_pcb->pcb_onfault = oldfault; 912 return rv; 913 } 914 915 memcpy(dst, src, len); 916 917 td->td_pcb->pcb_onfault = oldfault; 918 return (0); 919 } 920 921 void 922 asm_panic(char *pstr) 923 { 924 panic(pstr); 925 } 926 927 int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */ 928 929 int 930 db_trap_glue(struct trapframe *frame) 931 { 932 if (!(frame->srr1 & PSL_PR) 933 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC 934 || (frame->exc == EXC_PGM 935 && (frame->srr1 & 0x20000)) 936 || frame->exc == EXC_BPT 937 || frame->exc == EXC_DSI)) { 938 int type = frame->exc; 939 if (type == EXC_PGM && (frame->srr1 & 0x20000)) { 940 type = T_BREAKPOINT; 941 } 942 return (kdb_trap(type, 0, frame)); 943 } 944 945 return (0); 946 } 947