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 struct pcpu __pcpu[MAXCPU]; 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 long realmem = 0; 164 165 struct pmap ofw_pmap; 166 extern int ofmsr; 167 168 struct bat battable[16]; 169 170 struct kva_md_info kmi; 171 172 static void 173 powerpc_ofw_shutdown(void *junk, int howto) 174 { 175 if (howto & RB_HALT) { 176 OF_halt(); 177 } 178 OF_reboot(); 179 } 180 181 static void 182 cpu_startup(void *dummy) 183 { 184 185 /* 186 * Initialise the decrementer-based clock. 187 */ 188 decr_init(); 189 190 /* 191 * Good {morning,afternoon,evening,night}. 192 */ 193 cpu_setup(PCPU_GET(cpuid)); 194 195 /* startrtclock(); */ 196 #ifdef PERFMON 197 perfmon_init(); 198 #endif 199 printf("real memory = %ld (%ld MB)\n", ptoa(physmem), 200 ptoa(physmem) / 1048576); 201 realmem = physmem; 202 203 /* 204 * Display any holes after the first chunk of extended memory. 205 */ 206 if (bootverbose) { 207 int indx; 208 209 printf("Physical memory chunk(s):\n"); 210 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 211 int size1 = phys_avail[indx + 1] - phys_avail[indx]; 212 213 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", 214 phys_avail[indx], phys_avail[indx + 1] - 1, size1, 215 size1 / PAGE_SIZE); 216 } 217 } 218 219 vm_ksubmap_init(&kmi); 220 221 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 222 ptoa(cnt.v_free_count) / 1048576); 223 224 /* 225 * Set up buffers, so they can be used to read disk labels. 226 */ 227 bufinit(); 228 vm_pager_bufferinit(); 229 230 EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0, 231 SHUTDOWN_PRI_LAST); 232 233 #ifdef SMP 234 /* 235 * OK, enough kmem_alloc/malloc state should be up, lets get on with it! 236 */ 237 mp_start(); /* fire up the secondaries */ 238 mp_announce(); 239 #endif /* SMP */ 240 } 241 242 extern char kernel_text[], _end[]; 243 244 extern void *trapcode, *trapsize; 245 extern void *alitrap, *alisize; 246 extern void *dsitrap, *dsisize; 247 extern void *decrint, *decrsize; 248 extern void *extint, *extsize; 249 extern void *dblow, *dbsize; 250 251 void 252 powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp) 253 { 254 struct pcpu *pc; 255 vm_offset_t end, off; 256 void *kmdp; 257 char *env; 258 259 end = 0; 260 kmdp = NULL; 261 262 /* 263 * Parse metadata if present and fetch parameters. Must be done 264 * before console is inited so cninit gets the right value of 265 * boothowto. 266 */ 267 if (mdp != NULL) { 268 preload_metadata = mdp; 269 kmdp = preload_search_by_type("elf kernel"); 270 if (kmdp != NULL) { 271 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 272 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 273 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 274 #ifdef DDB 275 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 276 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 277 #endif 278 } 279 } 280 281 /* 282 * Init params/tunables that can be overridden by the loader 283 */ 284 init_param1(); 285 286 /* 287 * Start initializing proc0 and thread0. 288 */ 289 proc_linkup(&proc0, &ksegrp0, &thread0); 290 thread0.td_frame = &frame0; 291 292 /* 293 * Set up per-cpu data. 294 */ 295 pc = &__pcpu[0]; 296 pcpu_init(pc, 0, sizeof(struct pcpu)); 297 pc->pc_curthread = &thread0; 298 pc->pc_curpcb = thread0.td_pcb; 299 pc->pc_cpuid = 0; 300 301 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 302 303 mutex_init(); 304 305 /* 306 * Initialize the console before printing anything. 307 */ 308 cninit(); 309 310 /* 311 * Complain if there is no metadata. 312 */ 313 if (mdp == NULL || kmdp == NULL) { 314 printf("powerpc_init: no loader metadata.\n"); 315 } 316 317 kdb_init(); 318 319 /* 320 * XXX: Initialize the interrupt tables. 321 * Disable translation in case the vector area 322 * hasn't been mapped (G5) 323 */ 324 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR)); 325 isync(); 326 bcopy(&trapcode, (void *)EXC_RST, (size_t)&trapsize); 327 bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize); 328 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); 329 bcopy(&trapcode, (void *)EXC_ISI, (size_t)&trapsize); 330 bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize); 331 bcopy(&trapcode, (void *)EXC_ALI, (size_t)&trapsize); 332 bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize); 333 bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize); 334 bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize); 335 bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize); 336 bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize); 337 bcopy(&trapcode, (void *)EXC_FPA, (size_t)&trapsize); 338 bcopy(&trapcode, (void *)EXC_THRM, (size_t)&trapsize); 339 bcopy(&trapcode, (void *)EXC_BPT, (size_t)&trapsize); 340 #ifdef KDB 341 bcopy(&dblow, (void *)EXC_RST, (size_t)&dbsize); 342 bcopy(&dblow, (void *)EXC_MCHK, (size_t)&dbsize); 343 bcopy(&dblow, (void *)EXC_PGM, (size_t)&dbsize); 344 bcopy(&dblow, (void *)EXC_TRC, (size_t)&dbsize); 345 bcopy(&dblow, (void *)EXC_BPT, (size_t)&dbsize); 346 #endif 347 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 348 349 /* 350 * Make sure translation has been enabled 351 */ 352 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI); 353 isync(); 354 355 /* 356 * Initialise virtual memory. 357 */ 358 pmap_bootstrap(startkernel, endkernel); 359 360 /* 361 * Initialize params/tunables that are derived from memsize 362 */ 363 init_param2(physmem); 364 365 /* 366 * Grab booted kernel's name 367 */ 368 env = getenv("kernelname"); 369 if (env != NULL) { 370 strlcpy(kernelname, env, sizeof(kernelname)); 371 freeenv(env); 372 } 373 374 /* 375 * Finish setting up thread0. 376 */ 377 thread0.td_kstack = kstack0; 378 thread0.td_pcb = (struct pcb *) 379 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 380 381 /* 382 * Map and initialise the message buffer. 383 */ 384 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 385 pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off); 386 msgbufinit(msgbufp, MSGBUF_SIZE); 387 388 #ifdef KDB 389 if (boothowto & RB_KDB) 390 kdb_enter("Boot flags requested debugger"); 391 #endif 392 } 393 394 void 395 bzero(void *buf, size_t len) 396 { 397 caddr_t p; 398 399 p = buf; 400 401 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 402 *p++ = 0; 403 len--; 404 } 405 406 while (len >= sizeof(u_long) * 8) { 407 *(u_long*) p = 0; 408 *((u_long*) p + 1) = 0; 409 *((u_long*) p + 2) = 0; 410 *((u_long*) p + 3) = 0; 411 len -= sizeof(u_long) * 8; 412 *((u_long*) p + 4) = 0; 413 *((u_long*) p + 5) = 0; 414 *((u_long*) p + 6) = 0; 415 *((u_long*) p + 7) = 0; 416 p += sizeof(u_long) * 8; 417 } 418 419 while (len >= sizeof(u_long)) { 420 *(u_long*) p = 0; 421 len -= sizeof(u_long); 422 p += sizeof(u_long); 423 } 424 425 while (len) { 426 *p++ = 0; 427 len--; 428 } 429 } 430 431 void 432 sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code) 433 { 434 struct trapframe *tf; 435 struct sigframe *sfp; 436 struct sigacts *psp; 437 struct sigframe sf; 438 struct thread *td; 439 struct proc *p; 440 int oonstack, rndfsize; 441 442 td = curthread; 443 p = td->td_proc; 444 PROC_LOCK_ASSERT(p, MA_OWNED); 445 psp = p->p_sigacts; 446 mtx_assert(&psp->ps_mtx, MA_OWNED); 447 tf = td->td_frame; 448 oonstack = sigonstack(tf->fixreg[1]); 449 450 rndfsize = ((sizeof(sf) + 15) / 16) * 16; 451 452 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 453 catcher, sig); 454 455 /* 456 * Save user context 457 */ 458 memset(&sf, 0, sizeof(sf)); 459 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 460 sf.sf_uc.uc_sigmask = *mask; 461 sf.sf_uc.uc_stack = td->td_sigstk; 462 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 463 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 464 465 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 466 467 /* 468 * Allocate and validate space for the signal handler context. 469 */ 470 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 471 SIGISMEMBER(psp->ps_sigonstack, sig)) { 472 sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp + 473 td->td_sigstk.ss_size - rndfsize); 474 } else { 475 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); 476 } 477 478 /* 479 * Translate the signal if appropriate (Linux emu ?) 480 */ 481 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 482 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 483 484 /* 485 * Save the floating-point state, if necessary, then copy it. 486 */ 487 /* XXX */ 488 489 /* 490 * Set up the registers to return to sigcode. 491 * 492 * r1/sp - sigframe ptr 493 * lr - sig function, dispatched to by blrl in trampoline 494 * r3 - sig number 495 * r4 - SIGINFO ? &siginfo : exception code 496 * r5 - user context 497 * srr0 - trampoline function addr 498 */ 499 tf->lr = (register_t)catcher; 500 tf->fixreg[1] = (register_t)sfp; 501 tf->fixreg[FIRSTARG] = sig; 502 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; 503 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 504 /* 505 * Signal handler installed with SA_SIGINFO. 506 */ 507 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; 508 509 /* 510 * Fill siginfo structure. 511 */ 512 sf.sf_si.si_signo = sig; 513 sf.sf_si.si_code = code; 514 sf.sf_si.si_addr = (void *)tf->srr0; 515 } else { 516 /* Old FreeBSD-style arguments. */ 517 tf->fixreg[FIRSTARG+1] = code; 518 } 519 mtx_unlock(&psp->ps_mtx); 520 PROC_UNLOCK(p); 521 522 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 523 524 /* 525 * copy the frame out to userland. 526 */ 527 if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) { 528 /* 529 * Process has trashed its stack. Kill it. 530 */ 531 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 532 PROC_LOCK(p); 533 sigexit(td, SIGILL); 534 } 535 536 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, 537 tf->srr0, tf->fixreg[1]); 538 539 PROC_LOCK(p); 540 mtx_lock(&psp->ps_mtx); 541 } 542 543 /* 544 * Build siginfo_t for SA thread 545 */ 546 void 547 cpu_thread_siginfo(int sig, u_long code, siginfo_t *si) 548 { 549 struct proc *p; 550 struct thread *td; 551 552 td = curthread; 553 p = td->td_proc; 554 PROC_LOCK_ASSERT(p, MA_OWNED); 555 556 bzero(si, sizeof(*si)); 557 si->si_signo = sig; 558 si->si_code = code; 559 /* XXXKSE fill other fields */ 560 } 561 562 int 563 sigreturn(struct thread *td, struct sigreturn_args *uap) 564 { 565 struct proc *p; 566 ucontext_t uc; 567 int error; 568 569 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 570 571 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 572 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 573 return (EFAULT); 574 } 575 576 error = set_mcontext(td, &uc.uc_mcontext); 577 if (error != 0) 578 return (error); 579 580 p = td->td_proc; 581 PROC_LOCK(p); 582 td->td_sigmask = uc.uc_sigmask; 583 SIG_CANTMASK(td->td_sigmask); 584 signotify(td); 585 PROC_UNLOCK(p); 586 587 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", 588 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); 589 590 return (EJUSTRETURN); 591 } 592 593 #ifdef COMPAT_FREEBSD4 594 int 595 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 596 { 597 598 return sigreturn(td, (struct sigreturn_args *)uap); 599 } 600 #endif 601 602 /* 603 * Construct a PCB from a trapframe. This is called from kdb_trap() where 604 * we want to start a backtrace from the function that caused us to enter 605 * the debugger. We have the context in the trapframe, but base the trace 606 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 607 * enough for a backtrace. 608 */ 609 void 610 makectx(struct trapframe *tf, struct pcb *pcb) 611 { 612 613 pcb->pcb_lr = tf->srr0; 614 pcb->pcb_sp = tf->fixreg[1]; 615 } 616 617 /* 618 * get_mcontext/sendsig helper routine that doesn't touch the 619 * proc lock 620 */ 621 static int 622 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags) 623 { 624 struct pcb *pcb; 625 626 pcb = td->td_pcb; 627 628 memset(mcp, 0, sizeof(mcontext_t)); 629 630 mcp->mc_vers = _MC_VERSION; 631 mcp->mc_flags = 0; 632 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe)); 633 if (flags & GET_MC_CLEAR_RET) { 634 mcp->mc_gpr[3] = 0; 635 mcp->mc_gpr[4] = 0; 636 } 637 638 /* 639 * This assumes that floating-point context is *not* lazy, 640 * so if the thread has used FP there would have been a 641 * FP-unavailable exception that would have set things up 642 * correctly. 643 */ 644 if (pcb->pcb_flags & PCB_FPU) { 645 KASSERT(td == curthread, 646 ("get_mcontext: fp save not curthread")); 647 critical_enter(); 648 save_fpu(td); 649 critical_exit(); 650 mcp->mc_flags |= _MC_FP_VALID; 651 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double)); 652 memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double)); 653 } 654 655 /* XXX Altivec context ? */ 656 657 mcp->mc_len = sizeof(*mcp); 658 659 return (0); 660 } 661 662 int 663 get_mcontext(struct thread *td, mcontext_t *mcp, int flags) 664 { 665 int error; 666 667 error = grab_mcontext(td, mcp, flags); 668 if (error == 0) { 669 PROC_LOCK(curthread->td_proc); 670 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]); 671 PROC_UNLOCK(curthread->td_proc); 672 } 673 674 return (error); 675 } 676 677 int 678 set_mcontext(struct thread *td, const mcontext_t *mcp) 679 { 680 struct pcb *pcb; 681 struct trapframe *tf; 682 683 pcb = td->td_pcb; 684 tf = td->td_frame; 685 686 if (mcp->mc_vers != _MC_VERSION || 687 mcp->mc_len != sizeof(*mcp)) 688 return (EINVAL); 689 690 /* 691 * Don't let the user set privileged MSR bits 692 */ 693 if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) { 694 return (EINVAL); 695 } 696 697 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame)); 698 699 if (mcp->mc_flags & _MC_FP_VALID) { 700 if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) { 701 critical_enter(); 702 enable_fpu(td); 703 critical_exit(); 704 } 705 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double)); 706 memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double)); 707 } 708 709 /* XXX Altivec context? */ 710 711 return (0); 712 } 713 714 void 715 cpu_boot(int howto) 716 { 717 } 718 719 /* Get current clock frequency for the given cpu id. */ 720 int 721 cpu_est_clockrate(int cpu_id, uint64_t *rate) 722 { 723 724 return (ENXIO); 725 } 726 727 /* 728 * Shutdown the CPU as much as possible. 729 */ 730 void 731 cpu_halt(void) 732 { 733 734 OF_exit(); 735 } 736 737 void 738 cpu_idle(void) 739 { 740 /* TODO: Insert code to halt (until next interrupt) */ 741 742 #ifdef INVARIANTS 743 if ((mfmsr() & PSL_EE) != PSL_EE) { 744 struct thread *td = curthread; 745 printf("td msr %x\n", td->td_md.md_saved_msr); 746 panic("ints disabled in idleproc!"); 747 } 748 #endif 749 } 750 751 /* 752 * Set set up registers on exec. 753 */ 754 void 755 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 756 { 757 struct trapframe *tf; 758 struct ps_strings arginfo; 759 760 tf = trapframe(td); 761 bzero(tf, sizeof *tf); 762 tf->fixreg[1] = -roundup(-stack + 8, 16); 763 764 /* 765 * XXX Machine-independent code has already copied arguments and 766 * XXX environment to userland. Get them back here. 767 */ 768 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); 769 770 /* 771 * Set up arguments for _start(): 772 * _start(argc, argv, envp, obj, cleanup, ps_strings); 773 * 774 * Notes: 775 * - obj and cleanup are the auxilliary and termination 776 * vectors. They are fixed up by ld.elf_so. 777 * - ps_strings is a NetBSD extention, and will be 778 * ignored by executables which are strictly 779 * compliant with the SVR4 ABI. 780 * 781 * XXX We have to set both regs and retval here due to different 782 * XXX calling convention in trap.c and init_main.c. 783 */ 784 /* 785 * XXX PG: these get overwritten in the syscall return code. 786 * execve() should return EJUSTRETURN, like it does on NetBSD. 787 * Emulate by setting the syscall return value cells. The 788 * registers still have to be set for init's fork trampoline. 789 */ 790 td->td_retval[0] = arginfo.ps_nargvstr; 791 td->td_retval[1] = (register_t)arginfo.ps_argvstr; 792 tf->fixreg[3] = arginfo.ps_nargvstr; 793 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 794 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 795 tf->fixreg[6] = 0; /* auxillary vector */ 796 tf->fixreg[7] = 0; /* termination vector */ 797 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 798 799 tf->srr0 = entry; 800 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; 801 td->td_pcb->pcb_flags = 0; 802 } 803 804 int 805 fill_regs(struct thread *td, struct reg *regs) 806 { 807 struct trapframe *tf; 808 809 tf = td->td_frame; 810 memcpy(regs, tf, sizeof(struct reg)); 811 812 return (0); 813 } 814 815 int 816 fill_dbregs(struct thread *td, struct dbreg *dbregs) 817 { 818 /* No debug registers on PowerPC */ 819 return (ENOSYS); 820 } 821 822 int 823 fill_fpregs(struct thread *td, struct fpreg *fpregs) 824 { 825 struct pcb *pcb; 826 827 pcb = td->td_pcb; 828 829 if ((pcb->pcb_flags & PCB_FPU) == 0) 830 memset(fpregs, 0, sizeof(struct fpreg)); 831 else 832 memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg)); 833 834 return (0); 835 } 836 837 int 838 set_regs(struct thread *td, struct reg *regs) 839 { 840 struct trapframe *tf; 841 842 tf = td->td_frame; 843 memcpy(tf, regs, sizeof(struct reg)); 844 845 return (0); 846 } 847 848 int 849 set_dbregs(struct thread *td, struct dbreg *dbregs) 850 { 851 /* No debug registers on PowerPC */ 852 return (ENOSYS); 853 } 854 855 int 856 set_fpregs(struct thread *td, struct fpreg *fpregs) 857 { 858 struct pcb *pcb; 859 860 pcb = td->td_pcb; 861 if ((pcb->pcb_flags & PCB_FPU) == 0) 862 enable_fpu(td); 863 memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg)); 864 865 return (0); 866 } 867 868 int 869 ptrace_set_pc(struct thread *td, unsigned long addr) 870 { 871 struct trapframe *tf; 872 873 tf = td->td_frame; 874 tf->srr0 = (register_t)addr; 875 876 return (0); 877 } 878 879 int 880 ptrace_single_step(struct thread *td) 881 { 882 struct trapframe *tf; 883 884 tf = td->td_frame; 885 tf->srr1 |= PSL_SE; 886 887 return (0); 888 } 889 890 int 891 ptrace_clear_single_step(struct thread *td) 892 { 893 struct trapframe *tf; 894 895 tf = td->td_frame; 896 tf->srr1 &= ~PSL_SE; 897 898 return (0); 899 } 900 901 /* 902 * Initialise a struct pcpu. 903 */ 904 void 905 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 906 { 907 908 } 909 910 void 911 spinlock_enter(void) 912 { 913 struct thread *td; 914 915 td = curthread; 916 if (td->td_md.md_spinlock_count == 0) 917 td->td_md.md_saved_msr = intr_disable(); 918 td->td_md.md_spinlock_count++; 919 critical_enter(); 920 } 921 922 void 923 spinlock_exit(void) 924 { 925 struct thread *td; 926 927 td = curthread; 928 critical_exit(); 929 td->td_md.md_spinlock_count--; 930 if (td->td_md.md_spinlock_count == 0) 931 intr_restore(td->td_md.md_saved_msr); 932 } 933 934 /* 935 * kcopy(const void *src, void *dst, size_t len); 936 * 937 * Copy len bytes from src to dst, aborting if we encounter a fatal 938 * page fault. 939 * 940 * kcopy() _must_ save and restore the old fault handler since it is 941 * called by uiomove(), which may be in the path of servicing a non-fatal 942 * page fault. 943 */ 944 int 945 kcopy(const void *src, void *dst, size_t len) 946 { 947 struct thread *td; 948 faultbuf env, *oldfault; 949 int rv; 950 951 td = PCPU_GET(curthread); 952 oldfault = td->td_pcb->pcb_onfault; 953 if ((rv = setfault(env)) != 0) { 954 td->td_pcb->pcb_onfault = oldfault; 955 return rv; 956 } 957 958 memcpy(dst, src, len); 959 960 td->td_pcb->pcb_onfault = oldfault; 961 return (0); 962 } 963 964 void 965 asm_panic(char *pstr) 966 { 967 panic(pstr); 968 } 969 970 int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */ 971 972 int 973 db_trap_glue(struct trapframe *frame) 974 { 975 if (!(frame->srr1 & PSL_PR) 976 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC 977 || (frame->exc == EXC_PGM 978 && (frame->srr1 & 0x20000)) 979 || frame->exc == EXC_BPT 980 || frame->exc == EXC_DSI)) { 981 int type = frame->exc; 982 if (type == EXC_PGM && (frame->srr1 & 0x20000)) { 983 type = T_BREAKPOINT; 984 } 985 return (kdb_trap(type, 0, frame)); 986 } 987 988 return (0); 989 } 990