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/mmuvar.h> 114 #include <machine/pcb.h> 115 #include <machine/powerpc.h> 116 #include <machine/reg.h> 117 #include <machine/sigframe.h> 118 #include <machine/trap.h> 119 #include <machine/vmparam.h> 120 121 #include <ddb/ddb.h> 122 123 #include <dev/ofw/openfirm.h> 124 125 #ifdef DDB 126 extern vm_offset_t ksym_start, ksym_end; 127 #endif 128 129 int cold = 1; 130 131 struct pcpu __pcpu[MAXCPU]; 132 struct trapframe frame0; 133 134 vm_offset_t kstack0; 135 vm_offset_t kstack0_phys; 136 137 char machine[] = "powerpc"; 138 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 139 140 static char model[128]; 141 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, model, 0, ""); 142 143 static int cacheline_size = CACHELINESIZE; 144 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 145 CTLFLAG_RD, &cacheline_size, 0, ""); 146 147 static void cpu_startup(void *); 148 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL) 149 150 void powerpc_init(u_int, u_int, u_int, void *); 151 152 int save_ofw_mapping(void); 153 int restore_ofw_mapping(void); 154 155 void install_extint(void (*)(void)); 156 157 int setfault(faultbuf); /* defined in locore.S */ 158 159 static int grab_mcontext(struct thread *, mcontext_t *, int); 160 161 void asm_panic(char *); 162 163 long Maxmem = 0; 164 long realmem = 0; 165 166 struct pmap ofw_pmap; 167 extern int ofmsr; 168 169 struct bat battable[16]; 170 171 struct kva_md_info kmi; 172 173 static void 174 powerpc_ofw_shutdown(void *junk, int howto) 175 { 176 if (howto & RB_HALT) { 177 OF_halt(); 178 } 179 OF_reboot(); 180 } 181 182 static void 183 cpu_startup(void *dummy) 184 { 185 186 /* 187 * Initialise the decrementer-based clock. 188 */ 189 decr_init(); 190 191 /* 192 * Good {morning,afternoon,evening,night}. 193 */ 194 cpu_setup(PCPU_GET(cpuid)); 195 196 /* startrtclock(); */ 197 #ifdef PERFMON 198 perfmon_init(); 199 #endif 200 printf("real memory = %ld (%ld MB)\n", ptoa(physmem), 201 ptoa(physmem) / 1048576); 202 realmem = physmem; 203 204 /* 205 * Display any holes after the first chunk of extended memory. 206 */ 207 if (bootverbose) { 208 int indx; 209 210 printf("Physical memory chunk(s):\n"); 211 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 212 int size1 = phys_avail[indx + 1] - phys_avail[indx]; 213 214 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", 215 phys_avail[indx], phys_avail[indx + 1] - 1, size1, 216 size1 / PAGE_SIZE); 217 } 218 } 219 220 vm_ksubmap_init(&kmi); 221 222 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 223 ptoa(cnt.v_free_count) / 1048576); 224 225 /* 226 * Set up buffers, so they can be used to read disk labels. 227 */ 228 bufinit(); 229 vm_pager_bufferinit(); 230 231 EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0, 232 SHUTDOWN_PRI_LAST); 233 234 #ifdef SMP 235 /* 236 * OK, enough kmem_alloc/malloc state should be up, lets get on with it! 237 */ 238 mp_start(); /* fire up the secondaries */ 239 mp_announce(); 240 #endif /* SMP */ 241 } 242 243 extern char kernel_text[], _end[]; 244 245 extern void *trapcode, *trapsize; 246 extern void *alitrap, *alisize; 247 extern void *dsitrap, *dsisize; 248 extern void *decrint, *decrsize; 249 extern void *extint, *extsize; 250 extern void *dblow, *dbsize; 251 extern void *vectrap, *vectrapsize; 252 253 void 254 powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp) 255 { 256 struct pcpu *pc; 257 vm_offset_t end, off; 258 void *kmdp; 259 char *env; 260 261 end = 0; 262 kmdp = NULL; 263 264 /* 265 * Parse metadata if present and fetch parameters. Must be done 266 * before console is inited so cninit gets the right value of 267 * boothowto. 268 */ 269 if (mdp != NULL) { 270 preload_metadata = mdp; 271 kmdp = preload_search_by_type("elf kernel"); 272 if (kmdp != NULL) { 273 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 274 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 275 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 276 #ifdef DDB 277 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 278 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 279 #endif 280 } 281 } 282 283 /* 284 * Init params/tunables that can be overridden by the loader 285 */ 286 init_param1(); 287 288 /* 289 * Start initializing proc0 and thread0. 290 */ 291 proc_linkup(&proc0, &ksegrp0, &thread0); 292 thread0.td_frame = &frame0; 293 294 /* 295 * Set up per-cpu data. 296 */ 297 pc = &__pcpu[0]; 298 pcpu_init(pc, 0, sizeof(struct pcpu)); 299 pc->pc_curthread = &thread0; 300 pc->pc_curpcb = thread0.td_pcb; 301 pc->pc_cpuid = 0; 302 303 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 304 305 mutex_init(); 306 307 /* 308 * Initialize the console before printing anything. 309 */ 310 cninit(); 311 312 /* 313 * Complain if there is no metadata. 314 */ 315 if (mdp == NULL || kmdp == NULL) { 316 printf("powerpc_init: no loader metadata.\n"); 317 } 318 319 kdb_init(); 320 321 kobj_machdep_init(); 322 323 /* 324 * XXX: Initialize the interrupt tables. 325 * Disable translation in case the vector area 326 * hasn't been mapped (G5) 327 */ 328 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR)); 329 isync(); 330 bcopy(&trapcode, (void *)EXC_RST, (size_t)&trapsize); 331 bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize); 332 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); 333 bcopy(&trapcode, (void *)EXC_ISI, (size_t)&trapsize); 334 bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize); 335 bcopy(&trapcode, (void *)EXC_ALI, (size_t)&trapsize); 336 bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize); 337 bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize); 338 bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize); 339 bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize); 340 bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize); 341 bcopy(&trapcode, (void *)EXC_FPA, (size_t)&trapsize); 342 bcopy(&vectrap, (void *)EXC_VEC, (size_t)&vectrapsize); 343 bcopy(&trapcode, (void *)EXC_VECAST, (size_t)&trapsize); 344 bcopy(&trapcode, (void *)EXC_THRM, (size_t)&trapsize); 345 bcopy(&trapcode, (void *)EXC_BPT, (size_t)&trapsize); 346 #ifdef KDB 347 bcopy(&dblow, (void *)EXC_RST, (size_t)&dbsize); 348 bcopy(&dblow, (void *)EXC_MCHK, (size_t)&dbsize); 349 bcopy(&dblow, (void *)EXC_PGM, (size_t)&dbsize); 350 bcopy(&dblow, (void *)EXC_TRC, (size_t)&dbsize); 351 bcopy(&dblow, (void *)EXC_BPT, (size_t)&dbsize); 352 #endif 353 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 354 355 /* 356 * Make sure translation has been enabled 357 */ 358 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI); 359 isync(); 360 361 /* 362 * Initialise virtual memory. 363 */ 364 pmap_mmu_install(MMU_TYPE_OEA, 0); /* XXX temporary */ 365 pmap_bootstrap(startkernel, endkernel); 366 367 /* 368 * Initialize params/tunables that are derived from memsize 369 */ 370 init_param2(physmem); 371 372 /* 373 * Grab booted kernel's name 374 */ 375 env = getenv("kernelname"); 376 if (env != NULL) { 377 strlcpy(kernelname, env, sizeof(kernelname)); 378 freeenv(env); 379 } 380 381 /* 382 * Finish setting up thread0. 383 */ 384 thread0.td_kstack = kstack0; 385 thread0.td_pcb = (struct pcb *) 386 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 387 388 /* 389 * Map and initialise the message buffer. 390 */ 391 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 392 pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off); 393 msgbufinit(msgbufp, MSGBUF_SIZE); 394 395 #ifdef KDB 396 if (boothowto & RB_KDB) 397 kdb_enter("Boot flags requested debugger"); 398 #endif 399 } 400 401 void 402 bzero(void *buf, size_t len) 403 { 404 caddr_t p; 405 406 p = buf; 407 408 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 409 *p++ = 0; 410 len--; 411 } 412 413 while (len >= sizeof(u_long) * 8) { 414 *(u_long*) p = 0; 415 *((u_long*) p + 1) = 0; 416 *((u_long*) p + 2) = 0; 417 *((u_long*) p + 3) = 0; 418 len -= sizeof(u_long) * 8; 419 *((u_long*) p + 4) = 0; 420 *((u_long*) p + 5) = 0; 421 *((u_long*) p + 6) = 0; 422 *((u_long*) p + 7) = 0; 423 p += sizeof(u_long) * 8; 424 } 425 426 while (len >= sizeof(u_long)) { 427 *(u_long*) p = 0; 428 len -= sizeof(u_long); 429 p += sizeof(u_long); 430 } 431 432 while (len) { 433 *p++ = 0; 434 len--; 435 } 436 } 437 438 void 439 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 440 { 441 struct trapframe *tf; 442 struct sigframe *sfp; 443 struct sigacts *psp; 444 struct sigframe sf; 445 struct thread *td; 446 struct proc *p; 447 int oonstack, rndfsize; 448 int sig; 449 int code; 450 451 td = curthread; 452 p = td->td_proc; 453 PROC_LOCK_ASSERT(p, MA_OWNED); 454 sig = ksi->ksi_signo; 455 code = ksi->ksi_code; 456 psp = p->p_sigacts; 457 mtx_assert(&psp->ps_mtx, MA_OWNED); 458 tf = td->td_frame; 459 oonstack = sigonstack(tf->fixreg[1]); 460 461 rndfsize = ((sizeof(sf) + 15) / 16) * 16; 462 463 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 464 catcher, sig); 465 466 /* 467 * Save user context 468 */ 469 memset(&sf, 0, sizeof(sf)); 470 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 471 sf.sf_uc.uc_sigmask = *mask; 472 sf.sf_uc.uc_stack = td->td_sigstk; 473 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 474 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 475 476 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 477 478 /* 479 * Allocate and validate space for the signal handler context. 480 */ 481 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 482 SIGISMEMBER(psp->ps_sigonstack, sig)) { 483 sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp + 484 td->td_sigstk.ss_size - rndfsize); 485 } else { 486 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); 487 } 488 489 /* 490 * Translate the signal if appropriate (Linux emu ?) 491 */ 492 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 493 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 494 495 /* 496 * Save the floating-point state, if necessary, then copy it. 497 */ 498 /* XXX */ 499 500 /* 501 * Set up the registers to return to sigcode. 502 * 503 * r1/sp - sigframe ptr 504 * lr - sig function, dispatched to by blrl in trampoline 505 * r3 - sig number 506 * r4 - SIGINFO ? &siginfo : exception code 507 * r5 - user context 508 * srr0 - trampoline function addr 509 */ 510 tf->lr = (register_t)catcher; 511 tf->fixreg[1] = (register_t)sfp; 512 tf->fixreg[FIRSTARG] = sig; 513 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; 514 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 515 /* 516 * Signal handler installed with SA_SIGINFO. 517 */ 518 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; 519 520 /* 521 * Fill siginfo structure. 522 */ 523 sf.sf_si = ksi->ksi_info; 524 sf.sf_si.si_signo = sig; 525 sf.sf_si.si_addr = (void *)tf->srr0; /* XXX */ 526 } else { 527 /* Old FreeBSD-style arguments. */ 528 tf->fixreg[FIRSTARG+1] = code; 529 } 530 mtx_unlock(&psp->ps_mtx); 531 PROC_UNLOCK(p); 532 533 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 534 535 /* 536 * copy the frame out to userland. 537 */ 538 if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) { 539 /* 540 * Process has trashed its stack. Kill it. 541 */ 542 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 543 PROC_LOCK(p); 544 sigexit(td, SIGILL); 545 } 546 547 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, 548 tf->srr0, tf->fixreg[1]); 549 550 PROC_LOCK(p); 551 mtx_lock(&psp->ps_mtx); 552 } 553 554 int 555 sigreturn(struct thread *td, struct sigreturn_args *uap) 556 { 557 struct proc *p; 558 ucontext_t uc; 559 int error; 560 561 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 562 563 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 564 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 565 return (EFAULT); 566 } 567 568 error = set_mcontext(td, &uc.uc_mcontext); 569 if (error != 0) 570 return (error); 571 572 p = td->td_proc; 573 PROC_LOCK(p); 574 td->td_sigmask = uc.uc_sigmask; 575 SIG_CANTMASK(td->td_sigmask); 576 signotify(td); 577 PROC_UNLOCK(p); 578 579 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", 580 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); 581 582 return (EJUSTRETURN); 583 } 584 585 #ifdef COMPAT_FREEBSD4 586 int 587 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 588 { 589 590 return sigreturn(td, (struct sigreturn_args *)uap); 591 } 592 #endif 593 594 /* 595 * Construct a PCB from a trapframe. This is called from kdb_trap() where 596 * we want to start a backtrace from the function that caused us to enter 597 * the debugger. We have the context in the trapframe, but base the trace 598 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 599 * enough for a backtrace. 600 */ 601 void 602 makectx(struct trapframe *tf, struct pcb *pcb) 603 { 604 605 pcb->pcb_lr = tf->srr0; 606 pcb->pcb_sp = tf->fixreg[1]; 607 } 608 609 /* 610 * get_mcontext/sendsig helper routine that doesn't touch the 611 * proc lock 612 */ 613 static int 614 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags) 615 { 616 struct pcb *pcb; 617 618 pcb = td->td_pcb; 619 620 memset(mcp, 0, sizeof(mcontext_t)); 621 622 mcp->mc_vers = _MC_VERSION; 623 mcp->mc_flags = 0; 624 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe)); 625 if (flags & GET_MC_CLEAR_RET) { 626 mcp->mc_gpr[3] = 0; 627 mcp->mc_gpr[4] = 0; 628 } 629 630 /* 631 * This assumes that floating-point context is *not* lazy, 632 * so if the thread has used FP there would have been a 633 * FP-unavailable exception that would have set things up 634 * correctly. 635 */ 636 if (pcb->pcb_flags & PCB_FPU) { 637 KASSERT(td == curthread, 638 ("get_mcontext: fp save not curthread")); 639 critical_enter(); 640 save_fpu(td); 641 critical_exit(); 642 mcp->mc_flags |= _MC_FP_VALID; 643 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double)); 644 memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double)); 645 } 646 647 /* XXX Altivec context ? */ 648 649 mcp->mc_len = sizeof(*mcp); 650 651 return (0); 652 } 653 654 int 655 get_mcontext(struct thread *td, mcontext_t *mcp, int flags) 656 { 657 int error; 658 659 error = grab_mcontext(td, mcp, flags); 660 if (error == 0) { 661 PROC_LOCK(curthread->td_proc); 662 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]); 663 PROC_UNLOCK(curthread->td_proc); 664 } 665 666 return (error); 667 } 668 669 int 670 set_mcontext(struct thread *td, const mcontext_t *mcp) 671 { 672 struct pcb *pcb; 673 struct trapframe *tf; 674 675 pcb = td->td_pcb; 676 tf = td->td_frame; 677 678 if (mcp->mc_vers != _MC_VERSION || 679 mcp->mc_len != sizeof(*mcp)) 680 return (EINVAL); 681 682 /* 683 * Don't let the user set privileged MSR bits 684 */ 685 if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) { 686 return (EINVAL); 687 } 688 689 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame)); 690 691 if (mcp->mc_flags & _MC_FP_VALID) { 692 if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) { 693 critical_enter(); 694 enable_fpu(td); 695 critical_exit(); 696 } 697 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double)); 698 memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double)); 699 } 700 701 /* XXX Altivec context? */ 702 703 return (0); 704 } 705 706 void 707 cpu_boot(int howto) 708 { 709 } 710 711 /* Get current clock frequency for the given cpu id. */ 712 int 713 cpu_est_clockrate(int cpu_id, uint64_t *rate) 714 { 715 716 return (ENXIO); 717 } 718 719 /* 720 * Shutdown the CPU as much as possible. 721 */ 722 void 723 cpu_halt(void) 724 { 725 726 OF_exit(); 727 } 728 729 void 730 cpu_idle(void) 731 { 732 /* TODO: Insert code to halt (until next interrupt) */ 733 734 #ifdef INVARIANTS 735 if ((mfmsr() & PSL_EE) != PSL_EE) { 736 struct thread *td = curthread; 737 printf("td msr %x\n", td->td_md.md_saved_msr); 738 panic("ints disabled in idleproc!"); 739 } 740 #endif 741 } 742 743 /* 744 * Set set up registers on exec. 745 */ 746 void 747 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 748 { 749 struct trapframe *tf; 750 struct ps_strings arginfo; 751 752 tf = trapframe(td); 753 bzero(tf, sizeof *tf); 754 tf->fixreg[1] = -roundup(-stack + 8, 16); 755 756 /* 757 * XXX Machine-independent code has already copied arguments and 758 * XXX environment to userland. Get them back here. 759 */ 760 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); 761 762 /* 763 * Set up arguments for _start(): 764 * _start(argc, argv, envp, obj, cleanup, ps_strings); 765 * 766 * Notes: 767 * - obj and cleanup are the auxilliary and termination 768 * vectors. They are fixed up by ld.elf_so. 769 * - ps_strings is a NetBSD extention, and will be 770 * ignored by executables which are strictly 771 * compliant with the SVR4 ABI. 772 * 773 * XXX We have to set both regs and retval here due to different 774 * XXX calling convention in trap.c and init_main.c. 775 */ 776 /* 777 * XXX PG: these get overwritten in the syscall return code. 778 * execve() should return EJUSTRETURN, like it does on NetBSD. 779 * Emulate by setting the syscall return value cells. The 780 * registers still have to be set for init's fork trampoline. 781 */ 782 td->td_retval[0] = arginfo.ps_nargvstr; 783 td->td_retval[1] = (register_t)arginfo.ps_argvstr; 784 tf->fixreg[3] = arginfo.ps_nargvstr; 785 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 786 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 787 tf->fixreg[6] = 0; /* auxillary vector */ 788 tf->fixreg[7] = 0; /* termination vector */ 789 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 790 791 tf->srr0 = entry; 792 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; 793 td->td_pcb->pcb_flags = 0; 794 } 795 796 int 797 fill_regs(struct thread *td, struct reg *regs) 798 { 799 struct trapframe *tf; 800 801 tf = td->td_frame; 802 memcpy(regs, tf, sizeof(struct reg)); 803 804 return (0); 805 } 806 807 int 808 fill_dbregs(struct thread *td, struct dbreg *dbregs) 809 { 810 /* No debug registers on PowerPC */ 811 return (ENOSYS); 812 } 813 814 int 815 fill_fpregs(struct thread *td, struct fpreg *fpregs) 816 { 817 struct pcb *pcb; 818 819 pcb = td->td_pcb; 820 821 if ((pcb->pcb_flags & PCB_FPU) == 0) 822 memset(fpregs, 0, sizeof(struct fpreg)); 823 else 824 memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg)); 825 826 return (0); 827 } 828 829 int 830 set_regs(struct thread *td, struct reg *regs) 831 { 832 struct trapframe *tf; 833 834 tf = td->td_frame; 835 memcpy(tf, regs, sizeof(struct reg)); 836 837 return (0); 838 } 839 840 int 841 set_dbregs(struct thread *td, struct dbreg *dbregs) 842 { 843 /* No debug registers on PowerPC */ 844 return (ENOSYS); 845 } 846 847 int 848 set_fpregs(struct thread *td, struct fpreg *fpregs) 849 { 850 struct pcb *pcb; 851 852 pcb = td->td_pcb; 853 if ((pcb->pcb_flags & PCB_FPU) == 0) 854 enable_fpu(td); 855 memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg)); 856 857 return (0); 858 } 859 860 int 861 ptrace_set_pc(struct thread *td, unsigned long addr) 862 { 863 struct trapframe *tf; 864 865 tf = td->td_frame; 866 tf->srr0 = (register_t)addr; 867 868 return (0); 869 } 870 871 int 872 ptrace_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 int 883 ptrace_clear_single_step(struct thread *td) 884 { 885 struct trapframe *tf; 886 887 tf = td->td_frame; 888 tf->srr1 &= ~PSL_SE; 889 890 return (0); 891 } 892 893 /* 894 * Initialise a struct pcpu. 895 */ 896 void 897 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 898 { 899 900 } 901 902 void 903 spinlock_enter(void) 904 { 905 struct thread *td; 906 907 td = curthread; 908 if (td->td_md.md_spinlock_count == 0) 909 td->td_md.md_saved_msr = intr_disable(); 910 td->td_md.md_spinlock_count++; 911 critical_enter(); 912 } 913 914 void 915 spinlock_exit(void) 916 { 917 struct thread *td; 918 919 td = curthread; 920 critical_exit(); 921 td->td_md.md_spinlock_count--; 922 if (td->td_md.md_spinlock_count == 0) 923 intr_restore(td->td_md.md_saved_msr); 924 } 925 926 /* 927 * kcopy(const void *src, void *dst, size_t len); 928 * 929 * Copy len bytes from src to dst, aborting if we encounter a fatal 930 * page fault. 931 * 932 * kcopy() _must_ save and restore the old fault handler since it is 933 * called by uiomove(), which may be in the path of servicing a non-fatal 934 * page fault. 935 */ 936 int 937 kcopy(const void *src, void *dst, size_t len) 938 { 939 struct thread *td; 940 faultbuf env, *oldfault; 941 int rv; 942 943 td = PCPU_GET(curthread); 944 oldfault = td->td_pcb->pcb_onfault; 945 if ((rv = setfault(env)) != 0) { 946 td->td_pcb->pcb_onfault = oldfault; 947 return rv; 948 } 949 950 memcpy(dst, src, len); 951 952 td->td_pcb->pcb_onfault = oldfault; 953 return (0); 954 } 955 956 void 957 asm_panic(char *pstr) 958 { 959 panic(pstr); 960 } 961 962 int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */ 963 964 int 965 db_trap_glue(struct trapframe *frame) 966 { 967 if (!(frame->srr1 & PSL_PR) 968 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC 969 || (frame->exc == EXC_PGM 970 && (frame->srr1 & 0x20000)) 971 || frame->exc == EXC_BPT 972 || frame->exc == EXC_DSI)) { 973 int type = frame->exc; 974 if (type == EXC_PGM && (frame->srr1 & 0x20000)) { 975 type = T_BREAKPOINT; 976 } 977 return (kdb_trap(type, 0, frame)); 978 } 979 980 return (0); 981 } 982