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