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/cpu.h> 108 #include <machine/elf.h> 109 #include <machine/fpu.h> 110 #include <machine/md_var.h> 111 #include <machine/metadata.h> 112 #include <machine/mmuvar.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 void setPQL2(int *const size, int *const ways); 173 174 void 175 setPQL2(int *const size, int *const ways) 176 { 177 return; 178 } 179 180 static void 181 powerpc_ofw_shutdown(void *junk, int howto) 182 { 183 if (howto & RB_HALT) { 184 OF_halt(); 185 } 186 OF_reboot(); 187 } 188 189 static void 190 cpu_startup(void *dummy) 191 { 192 193 /* 194 * Initialise the decrementer-based clock. 195 */ 196 decr_init(); 197 198 /* 199 * Good {morning,afternoon,evening,night}. 200 */ 201 cpu_setup(PCPU_GET(cpuid)); 202 203 /* startrtclock(); */ 204 #ifdef PERFMON 205 perfmon_init(); 206 #endif 207 printf("real memory = %ld (%ld MB)\n", ptoa(physmem), 208 ptoa(physmem) / 1048576); 209 realmem = physmem; 210 211 /* 212 * Display any holes after the first chunk of extended memory. 213 */ 214 if (bootverbose) { 215 int indx; 216 217 printf("Physical memory chunk(s):\n"); 218 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 219 int size1 = phys_avail[indx + 1] - phys_avail[indx]; 220 221 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", 222 phys_avail[indx], phys_avail[indx + 1] - 1, size1, 223 size1 / PAGE_SIZE); 224 } 225 } 226 227 vm_ksubmap_init(&kmi); 228 229 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 230 ptoa(cnt.v_free_count) / 1048576); 231 232 /* 233 * Set up buffers, so they can be used to read disk labels. 234 */ 235 bufinit(); 236 vm_pager_bufferinit(); 237 238 EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0, 239 SHUTDOWN_PRI_LAST); 240 241 #ifdef SMP 242 /* 243 * OK, enough kmem_alloc/malloc state should be up, lets get on with it! 244 */ 245 mp_start(); /* fire up the secondaries */ 246 mp_announce(); 247 #endif /* SMP */ 248 } 249 250 extern char kernel_text[], _end[]; 251 252 extern void *trapcode, *trapsize; 253 extern void *alitrap, *alisize; 254 extern void *dsitrap, *dsisize; 255 extern void *decrint, *decrsize; 256 extern void *extint, *extsize; 257 extern void *dblow, *dbsize; 258 extern void *vectrap, *vectrapsize; 259 260 void 261 powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp) 262 { 263 struct pcpu *pc; 264 vm_offset_t end, off; 265 void *kmdp; 266 char *env; 267 268 end = 0; 269 kmdp = NULL; 270 271 /* 272 * Parse metadata if present and fetch parameters. Must be done 273 * before console is inited so cninit gets the right value of 274 * boothowto. 275 */ 276 if (mdp != NULL) { 277 preload_metadata = mdp; 278 kmdp = preload_search_by_type("elf kernel"); 279 if (kmdp != NULL) { 280 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 281 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 282 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 283 #ifdef DDB 284 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 285 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 286 #endif 287 } 288 } 289 290 /* 291 * Init params/tunables that can be overridden by the loader 292 */ 293 init_param1(); 294 295 /* 296 * Start initializing proc0 and thread0. 297 */ 298 #ifdef KSE 299 proc_linkup(&proc0, &ksegrp0, &thread0); 300 #else 301 proc_linkup(&proc0, &thread0); 302 #endif 303 thread0.td_frame = &frame0; 304 305 /* 306 * Set up per-cpu data. 307 */ 308 pc = &__pcpu[0]; 309 pcpu_init(pc, 0, sizeof(struct pcpu)); 310 pc->pc_curthread = &thread0; 311 pc->pc_curpcb = thread0.td_pcb; 312 pc->pc_cpuid = 0; 313 314 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 315 316 mutex_init(); 317 318 /* 319 * Initialize the console before printing anything. 320 */ 321 cninit(); 322 323 /* 324 * Complain if there is no metadata. 325 */ 326 if (mdp == NULL || kmdp == NULL) { 327 printf("powerpc_init: no loader metadata.\n"); 328 } 329 330 kdb_init(); 331 332 kobj_machdep_init(); 333 334 /* 335 * XXX: Initialize the interrupt tables. 336 * Disable translation in case the vector area 337 * hasn't been mapped (G5) 338 */ 339 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR)); 340 isync(); 341 bcopy(&trapcode, (void *)EXC_RST, (size_t)&trapsize); 342 bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize); 343 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); 344 bcopy(&trapcode, (void *)EXC_ISI, (size_t)&trapsize); 345 bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize); 346 bcopy(&alitrap, (void *)EXC_ALI, (size_t)&alisize); 347 bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize); 348 bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize); 349 bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize); 350 bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize); 351 bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize); 352 bcopy(&trapcode, (void *)EXC_FPA, (size_t)&trapsize); 353 bcopy(&vectrap, (void *)EXC_VEC, (size_t)&vectrapsize); 354 bcopy(&trapcode, (void *)EXC_VECAST, (size_t)&trapsize); 355 bcopy(&trapcode, (void *)EXC_THRM, (size_t)&trapsize); 356 bcopy(&trapcode, (void *)EXC_BPT, (size_t)&trapsize); 357 #ifdef KDB 358 bcopy(&dblow, (void *)EXC_RST, (size_t)&dbsize); 359 bcopy(&dblow, (void *)EXC_MCHK, (size_t)&dbsize); 360 bcopy(&dblow, (void *)EXC_PGM, (size_t)&dbsize); 361 bcopy(&dblow, (void *)EXC_TRC, (size_t)&dbsize); 362 bcopy(&dblow, (void *)EXC_BPT, (size_t)&dbsize); 363 #endif 364 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 365 366 /* 367 * Make sure translation has been enabled 368 */ 369 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI); 370 isync(); 371 372 /* 373 * Initialise virtual memory. 374 */ 375 pmap_mmu_install(MMU_TYPE_OEA, 0); /* XXX temporary */ 376 pmap_bootstrap(startkernel, endkernel); 377 378 /* 379 * Initialize params/tunables that are derived from memsize 380 */ 381 init_param2(physmem); 382 383 /* 384 * Grab booted kernel's name 385 */ 386 env = getenv("kernelname"); 387 if (env != NULL) { 388 strlcpy(kernelname, env, sizeof(kernelname)); 389 freeenv(env); 390 } 391 392 /* 393 * Finish setting up thread0. 394 */ 395 thread0.td_kstack = kstack0; 396 thread0.td_pcb = (struct pcb *) 397 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 398 399 /* 400 * Map and initialise the message buffer. 401 */ 402 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 403 pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off); 404 msgbufinit(msgbufp, MSGBUF_SIZE); 405 406 #ifdef KDB 407 if (boothowto & RB_KDB) 408 kdb_enter("Boot flags requested debugger"); 409 #endif 410 } 411 412 void 413 bzero(void *buf, size_t len) 414 { 415 caddr_t p; 416 417 p = buf; 418 419 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 420 *p++ = 0; 421 len--; 422 } 423 424 while (len >= sizeof(u_long) * 8) { 425 *(u_long*) p = 0; 426 *((u_long*) p + 1) = 0; 427 *((u_long*) p + 2) = 0; 428 *((u_long*) p + 3) = 0; 429 len -= sizeof(u_long) * 8; 430 *((u_long*) p + 4) = 0; 431 *((u_long*) p + 5) = 0; 432 *((u_long*) p + 6) = 0; 433 *((u_long*) p + 7) = 0; 434 p += sizeof(u_long) * 8; 435 } 436 437 while (len >= sizeof(u_long)) { 438 *(u_long*) p = 0; 439 len -= sizeof(u_long); 440 p += sizeof(u_long); 441 } 442 443 while (len) { 444 *p++ = 0; 445 len--; 446 } 447 } 448 449 void 450 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 451 { 452 struct trapframe *tf; 453 struct sigframe *sfp; 454 struct sigacts *psp; 455 struct sigframe sf; 456 struct thread *td; 457 struct proc *p; 458 int oonstack, rndfsize; 459 int sig; 460 int code; 461 462 td = curthread; 463 p = td->td_proc; 464 PROC_LOCK_ASSERT(p, MA_OWNED); 465 sig = ksi->ksi_signo; 466 code = ksi->ksi_code; 467 psp = p->p_sigacts; 468 mtx_assert(&psp->ps_mtx, MA_OWNED); 469 tf = td->td_frame; 470 oonstack = sigonstack(tf->fixreg[1]); 471 472 rndfsize = ((sizeof(sf) + 15) / 16) * 16; 473 474 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 475 catcher, sig); 476 477 /* 478 * Save user context 479 */ 480 memset(&sf, 0, sizeof(sf)); 481 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 482 sf.sf_uc.uc_sigmask = *mask; 483 sf.sf_uc.uc_stack = td->td_sigstk; 484 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 485 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 486 487 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 488 489 /* 490 * Allocate and validate space for the signal handler context. 491 */ 492 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 493 SIGISMEMBER(psp->ps_sigonstack, sig)) { 494 sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp + 495 td->td_sigstk.ss_size - rndfsize); 496 } else { 497 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); 498 } 499 500 /* 501 * Translate the signal if appropriate (Linux emu ?) 502 */ 503 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 504 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 505 506 /* 507 * Save the floating-point state, if necessary, then copy it. 508 */ 509 /* XXX */ 510 511 /* 512 * Set up the registers to return to sigcode. 513 * 514 * r1/sp - sigframe ptr 515 * lr - sig function, dispatched to by blrl in trampoline 516 * r3 - sig number 517 * r4 - SIGINFO ? &siginfo : exception code 518 * r5 - user context 519 * srr0 - trampoline function addr 520 */ 521 tf->lr = (register_t)catcher; 522 tf->fixreg[1] = (register_t)sfp; 523 tf->fixreg[FIRSTARG] = sig; 524 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; 525 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 526 /* 527 * Signal handler installed with SA_SIGINFO. 528 */ 529 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; 530 531 /* 532 * Fill siginfo structure. 533 */ 534 sf.sf_si = ksi->ksi_info; 535 sf.sf_si.si_signo = sig; 536 sf.sf_si.si_addr = (void *) ((tf->exc == EXC_DSI) ? 537 tf->dar : tf->srr0); 538 } else { 539 /* Old FreeBSD-style arguments. */ 540 tf->fixreg[FIRSTARG+1] = code; 541 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ? 542 tf->dar : tf->srr0; 543 } 544 mtx_unlock(&psp->ps_mtx); 545 PROC_UNLOCK(p); 546 547 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 548 549 /* 550 * copy the frame out to userland. 551 */ 552 if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) { 553 /* 554 * Process has trashed its stack. Kill it. 555 */ 556 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 557 PROC_LOCK(p); 558 sigexit(td, SIGILL); 559 } 560 561 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, 562 tf->srr0, tf->fixreg[1]); 563 564 PROC_LOCK(p); 565 mtx_lock(&psp->ps_mtx); 566 } 567 568 int 569 sigreturn(struct thread *td, struct sigreturn_args *uap) 570 { 571 struct proc *p; 572 ucontext_t uc; 573 int error; 574 575 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 576 577 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 578 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 579 return (EFAULT); 580 } 581 582 error = set_mcontext(td, &uc.uc_mcontext); 583 if (error != 0) 584 return (error); 585 586 p = td->td_proc; 587 PROC_LOCK(p); 588 td->td_sigmask = uc.uc_sigmask; 589 SIG_CANTMASK(td->td_sigmask); 590 signotify(td); 591 PROC_UNLOCK(p); 592 593 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", 594 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); 595 596 return (EJUSTRETURN); 597 } 598 599 #ifdef COMPAT_FREEBSD4 600 int 601 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 602 { 603 604 return sigreturn(td, (struct sigreturn_args *)uap); 605 } 606 #endif 607 608 /* 609 * Construct a PCB from a trapframe. This is called from kdb_trap() where 610 * we want to start a backtrace from the function that caused us to enter 611 * the debugger. We have the context in the trapframe, but base the trace 612 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 613 * enough for a backtrace. 614 */ 615 void 616 makectx(struct trapframe *tf, struct pcb *pcb) 617 { 618 619 pcb->pcb_lr = tf->srr0; 620 pcb->pcb_sp = tf->fixreg[1]; 621 } 622 623 /* 624 * get_mcontext/sendsig helper routine that doesn't touch the 625 * proc lock 626 */ 627 static int 628 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags) 629 { 630 struct pcb *pcb; 631 632 pcb = td->td_pcb; 633 634 memset(mcp, 0, sizeof(mcontext_t)); 635 636 mcp->mc_vers = _MC_VERSION; 637 mcp->mc_flags = 0; 638 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe)); 639 if (flags & GET_MC_CLEAR_RET) { 640 mcp->mc_gpr[3] = 0; 641 mcp->mc_gpr[4] = 0; 642 } 643 644 /* 645 * This assumes that floating-point context is *not* lazy, 646 * so if the thread has used FP there would have been a 647 * FP-unavailable exception that would have set things up 648 * correctly. 649 */ 650 if (pcb->pcb_flags & PCB_FPU) { 651 KASSERT(td == curthread, 652 ("get_mcontext: fp save not curthread")); 653 critical_enter(); 654 save_fpu(td); 655 critical_exit(); 656 mcp->mc_flags |= _MC_FP_VALID; 657 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double)); 658 memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double)); 659 } 660 661 /* XXX Altivec context ? */ 662 663 mcp->mc_len = sizeof(*mcp); 664 665 return (0); 666 } 667 668 int 669 get_mcontext(struct thread *td, mcontext_t *mcp, int flags) 670 { 671 int error; 672 673 error = grab_mcontext(td, mcp, flags); 674 if (error == 0) { 675 PROC_LOCK(curthread->td_proc); 676 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]); 677 PROC_UNLOCK(curthread->td_proc); 678 } 679 680 return (error); 681 } 682 683 int 684 set_mcontext(struct thread *td, const mcontext_t *mcp) 685 { 686 struct pcb *pcb; 687 struct trapframe *tf; 688 689 pcb = td->td_pcb; 690 tf = td->td_frame; 691 692 if (mcp->mc_vers != _MC_VERSION || 693 mcp->mc_len != sizeof(*mcp)) 694 return (EINVAL); 695 696 /* 697 * Don't let the user set privileged MSR bits 698 */ 699 if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) { 700 return (EINVAL); 701 } 702 703 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame)); 704 705 if (mcp->mc_flags & _MC_FP_VALID) { 706 if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) { 707 critical_enter(); 708 enable_fpu(td); 709 critical_exit(); 710 } 711 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double)); 712 memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double)); 713 } 714 715 /* XXX Altivec context? */ 716 717 return (0); 718 } 719 720 void 721 cpu_boot(int howto) 722 { 723 } 724 725 /* Get current clock frequency for the given cpu id. */ 726 int 727 cpu_est_clockrate(int cpu_id, uint64_t *rate) 728 { 729 730 return (ENXIO); 731 } 732 733 /* 734 * Shutdown the CPU as much as possible. 735 */ 736 void 737 cpu_halt(void) 738 { 739 740 OF_exit(); 741 } 742 743 void 744 cpu_idle(void) 745 { 746 /* TODO: Insert code to halt (until next interrupt) */ 747 748 #ifdef INVARIANTS 749 if ((mfmsr() & PSL_EE) != PSL_EE) { 750 struct thread *td = curthread; 751 printf("td msr %x\n", td->td_md.md_saved_msr); 752 panic("ints disabled in idleproc!"); 753 } 754 #endif 755 } 756 757 /* 758 * Set set up registers on exec. 759 */ 760 void 761 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 762 { 763 struct trapframe *tf; 764 struct ps_strings arginfo; 765 766 tf = trapframe(td); 767 bzero(tf, sizeof *tf); 768 tf->fixreg[1] = -roundup(-stack + 8, 16); 769 770 /* 771 * XXX Machine-independent code has already copied arguments and 772 * XXX environment to userland. Get them back here. 773 */ 774 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); 775 776 /* 777 * Set up arguments for _start(): 778 * _start(argc, argv, envp, obj, cleanup, ps_strings); 779 * 780 * Notes: 781 * - obj and cleanup are the auxilliary and termination 782 * vectors. They are fixed up by ld.elf_so. 783 * - ps_strings is a NetBSD extention, and will be 784 * ignored by executables which are strictly 785 * compliant with the SVR4 ABI. 786 * 787 * XXX We have to set both regs and retval here due to different 788 * XXX calling convention in trap.c and init_main.c. 789 */ 790 /* 791 * XXX PG: these get overwritten in the syscall return code. 792 * execve() should return EJUSTRETURN, like it does on NetBSD. 793 * Emulate by setting the syscall return value cells. The 794 * registers still have to be set for init's fork trampoline. 795 */ 796 td->td_retval[0] = arginfo.ps_nargvstr; 797 td->td_retval[1] = (register_t)arginfo.ps_argvstr; 798 tf->fixreg[3] = arginfo.ps_nargvstr; 799 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 800 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 801 tf->fixreg[6] = 0; /* auxillary vector */ 802 tf->fixreg[7] = 0; /* termination vector */ 803 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 804 805 tf->srr0 = entry; 806 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; 807 td->td_pcb->pcb_flags = 0; 808 } 809 810 int 811 fill_regs(struct thread *td, struct reg *regs) 812 { 813 struct trapframe *tf; 814 815 tf = td->td_frame; 816 memcpy(regs, tf, sizeof(struct reg)); 817 818 return (0); 819 } 820 821 int 822 fill_dbregs(struct thread *td, struct dbreg *dbregs) 823 { 824 /* No debug registers on PowerPC */ 825 return (ENOSYS); 826 } 827 828 int 829 fill_fpregs(struct thread *td, struct fpreg *fpregs) 830 { 831 struct pcb *pcb; 832 833 pcb = td->td_pcb; 834 835 if ((pcb->pcb_flags & PCB_FPU) == 0) 836 memset(fpregs, 0, sizeof(struct fpreg)); 837 else 838 memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg)); 839 840 return (0); 841 } 842 843 int 844 set_regs(struct thread *td, struct reg *regs) 845 { 846 struct trapframe *tf; 847 848 tf = td->td_frame; 849 memcpy(tf, regs, sizeof(struct reg)); 850 851 return (0); 852 } 853 854 int 855 set_dbregs(struct thread *td, struct dbreg *dbregs) 856 { 857 /* No debug registers on PowerPC */ 858 return (ENOSYS); 859 } 860 861 int 862 set_fpregs(struct thread *td, struct fpreg *fpregs) 863 { 864 struct pcb *pcb; 865 866 pcb = td->td_pcb; 867 if ((pcb->pcb_flags & PCB_FPU) == 0) 868 enable_fpu(td); 869 memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg)); 870 871 return (0); 872 } 873 874 int 875 ptrace_set_pc(struct thread *td, unsigned long addr) 876 { 877 struct trapframe *tf; 878 879 tf = td->td_frame; 880 tf->srr0 = (register_t)addr; 881 882 return (0); 883 } 884 885 int 886 ptrace_single_step(struct thread *td) 887 { 888 struct trapframe *tf; 889 890 tf = td->td_frame; 891 tf->srr1 |= PSL_SE; 892 893 return (0); 894 } 895 896 int 897 ptrace_clear_single_step(struct thread *td) 898 { 899 struct trapframe *tf; 900 901 tf = td->td_frame; 902 tf->srr1 &= ~PSL_SE; 903 904 return (0); 905 } 906 907 /* 908 * Initialise a struct pcpu. 909 */ 910 void 911 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 912 { 913 914 } 915 916 void 917 spinlock_enter(void) 918 { 919 struct thread *td; 920 921 td = curthread; 922 if (td->td_md.md_spinlock_count == 0) 923 td->td_md.md_saved_msr = intr_disable(); 924 td->td_md.md_spinlock_count++; 925 critical_enter(); 926 } 927 928 void 929 spinlock_exit(void) 930 { 931 struct thread *td; 932 933 td = curthread; 934 critical_exit(); 935 td->td_md.md_spinlock_count--; 936 if (td->td_md.md_spinlock_count == 0) 937 intr_restore(td->td_md.md_saved_msr); 938 } 939 940 /* 941 * kcopy(const void *src, void *dst, size_t len); 942 * 943 * Copy len bytes from src to dst, aborting if we encounter a fatal 944 * page fault. 945 * 946 * kcopy() _must_ save and restore the old fault handler since it is 947 * called by uiomove(), which may be in the path of servicing a non-fatal 948 * page fault. 949 */ 950 int 951 kcopy(const void *src, void *dst, size_t len) 952 { 953 struct thread *td; 954 faultbuf env, *oldfault; 955 int rv; 956 957 td = PCPU_GET(curthread); 958 oldfault = td->td_pcb->pcb_onfault; 959 if ((rv = setfault(env)) != 0) { 960 td->td_pcb->pcb_onfault = oldfault; 961 return rv; 962 } 963 964 memcpy(dst, src, len); 965 966 td->td_pcb->pcb_onfault = oldfault; 967 return (0); 968 } 969 970 void 971 asm_panic(char *pstr) 972 { 973 panic(pstr); 974 } 975 976 int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */ 977 978 int 979 db_trap_glue(struct trapframe *frame) 980 { 981 if (!(frame->srr1 & PSL_PR) 982 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC 983 || (frame->exc == EXC_PGM 984 && (frame->srr1 & 0x20000)) 985 || frame->exc == EXC_BPT 986 || frame->exc == EXC_DSI)) { 987 int type = frame->exc; 988 if (type == EXC_PGM && (frame->srr1 & 0x20000)) { 989 type = T_BREAKPOINT; 990 } 991 return (kdb_trap(type, 0, frame)); 992 } 993 994 return (0); 995 } 996