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 int cacheline_size = CACHELINESIZE; 140 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 141 CTLFLAG_RD, &cacheline_size, 0, ""); 142 143 static void cpu_startup(void *); 144 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL) 145 146 void powerpc_init(u_int, u_int, u_int, void *); 147 148 int save_ofw_mapping(void); 149 int restore_ofw_mapping(void); 150 151 void install_extint(void (*)(void)); 152 153 int setfault(faultbuf); /* defined in locore.S */ 154 155 static int grab_mcontext(struct thread *, mcontext_t *, int); 156 157 void asm_panic(char *); 158 159 long Maxmem = 0; 160 long realmem = 0; 161 162 struct pmap ofw_pmap; 163 extern int ofmsr; 164 165 struct bat battable[16]; 166 167 struct kva_md_info kmi; 168 169 void setPQL2(int *const size, int *const ways); 170 171 void 172 setPQL2(int *const size, int *const ways) 173 { 174 return; 175 } 176 177 static void 178 powerpc_ofw_shutdown(void *junk, int howto) 179 { 180 if (howto & RB_HALT) { 181 OF_halt(); 182 } 183 OF_reboot(); 184 } 185 186 static void 187 cpu_startup(void *dummy) 188 { 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 extern void *vectrap, *vectrapsize; 251 252 void 253 powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp) 254 { 255 struct pcpu *pc; 256 vm_offset_t end, off; 257 void *kmdp; 258 char *env; 259 260 end = 0; 261 kmdp = NULL; 262 263 /* 264 * Parse metadata if present and fetch parameters. Must be done 265 * before console is inited so cninit gets the right value of 266 * boothowto. 267 */ 268 if (mdp != NULL) { 269 preload_metadata = mdp; 270 kmdp = preload_search_by_type("elf kernel"); 271 if (kmdp != NULL) { 272 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 273 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 274 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 275 #ifdef DDB 276 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 277 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 278 #endif 279 } 280 } 281 282 /* 283 * Init params/tunables that can be overridden by the loader 284 */ 285 init_param1(); 286 287 /* 288 * Start initializing proc0 and thread0. 289 */ 290 proc_linkup(&proc0, &thread0); 291 thread0.td_frame = &frame0; 292 293 /* 294 * Set up per-cpu data. 295 */ 296 pc = &__pcpu[0]; 297 pcpu_init(pc, 0, sizeof(struct pcpu)); 298 pc->pc_curthread = &thread0; 299 pc->pc_curpcb = thread0.td_pcb; 300 pc->pc_cpuid = 0; 301 302 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 303 304 mutex_init(); 305 306 /* 307 * Initialize the console before printing anything. 308 */ 309 cninit(); 310 311 /* 312 * Complain if there is no metadata. 313 */ 314 if (mdp == NULL || kmdp == NULL) { 315 printf("powerpc_init: no loader metadata.\n"); 316 } 317 318 kdb_init(); 319 320 kobj_machdep_init(); 321 322 /* 323 * XXX: Initialize the interrupt tables. 324 * Disable translation in case the vector area 325 * hasn't been mapped (G5) 326 */ 327 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR)); 328 isync(); 329 bcopy(&trapcode, (void *)EXC_RST, (size_t)&trapsize); 330 bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize); 331 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); 332 bcopy(&trapcode, (void *)EXC_ISI, (size_t)&trapsize); 333 bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize); 334 bcopy(&alitrap, (void *)EXC_ALI, (size_t)&alisize); 335 bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize); 336 bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize); 337 bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize); 338 bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize); 339 bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize); 340 bcopy(&trapcode, (void *)EXC_FPA, (size_t)&trapsize); 341 bcopy(&vectrap, (void *)EXC_VEC, (size_t)&vectrapsize); 342 bcopy(&trapcode, (void *)EXC_VECAST, (size_t)&trapsize); 343 bcopy(&trapcode, (void *)EXC_THRM, (size_t)&trapsize); 344 bcopy(&trapcode, (void *)EXC_BPT, (size_t)&trapsize); 345 #ifdef KDB 346 bcopy(&dblow, (void *)EXC_RST, (size_t)&dbsize); 347 bcopy(&dblow, (void *)EXC_MCHK, (size_t)&dbsize); 348 bcopy(&dblow, (void *)EXC_PGM, (size_t)&dbsize); 349 bcopy(&dblow, (void *)EXC_TRC, (size_t)&dbsize); 350 bcopy(&dblow, (void *)EXC_BPT, (size_t)&dbsize); 351 #endif 352 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 353 354 /* 355 * Make sure translation has been enabled 356 */ 357 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI); 358 isync(); 359 360 /* 361 * Initialise virtual memory. 362 */ 363 pmap_mmu_install(MMU_TYPE_OEA, 0); /* XXX temporary */ 364 pmap_bootstrap(startkernel, endkernel); 365 366 /* 367 * Initialize params/tunables that are derived from memsize 368 */ 369 init_param2(physmem); 370 371 /* 372 * Grab booted kernel's name 373 */ 374 env = getenv("kernelname"); 375 if (env != NULL) { 376 strlcpy(kernelname, env, sizeof(kernelname)); 377 freeenv(env); 378 } 379 380 /* 381 * Finish setting up thread0. 382 */ 383 thread0.td_kstack = kstack0; 384 thread0.td_pcb = (struct pcb *) 385 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 386 387 /* 388 * Map and initialise the message buffer. 389 */ 390 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 391 pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off); 392 msgbufinit(msgbufp, MSGBUF_SIZE); 393 394 #ifdef KDB 395 if (boothowto & RB_KDB) 396 kdb_enter("Boot flags requested debugger"); 397 #endif 398 } 399 400 void 401 bzero(void *buf, size_t len) 402 { 403 caddr_t p; 404 405 p = buf; 406 407 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 408 *p++ = 0; 409 len--; 410 } 411 412 while (len >= sizeof(u_long) * 8) { 413 *(u_long*) p = 0; 414 *((u_long*) p + 1) = 0; 415 *((u_long*) p + 2) = 0; 416 *((u_long*) p + 3) = 0; 417 len -= sizeof(u_long) * 8; 418 *((u_long*) p + 4) = 0; 419 *((u_long*) p + 5) = 0; 420 *((u_long*) p + 6) = 0; 421 *((u_long*) p + 7) = 0; 422 p += sizeof(u_long) * 8; 423 } 424 425 while (len >= sizeof(u_long)) { 426 *(u_long*) p = 0; 427 len -= sizeof(u_long); 428 p += sizeof(u_long); 429 } 430 431 while (len) { 432 *p++ = 0; 433 len--; 434 } 435 } 436 437 void 438 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 439 { 440 struct trapframe *tf; 441 struct sigframe *sfp; 442 struct sigacts *psp; 443 struct sigframe sf; 444 struct thread *td; 445 struct proc *p; 446 int oonstack, rndfsize; 447 int sig; 448 int code; 449 450 td = curthread; 451 p = td->td_proc; 452 PROC_LOCK_ASSERT(p, MA_OWNED); 453 sig = ksi->ksi_signo; 454 code = ksi->ksi_code; 455 psp = p->p_sigacts; 456 mtx_assert(&psp->ps_mtx, MA_OWNED); 457 tf = td->td_frame; 458 oonstack = sigonstack(tf->fixreg[1]); 459 460 rndfsize = ((sizeof(sf) + 15) / 16) * 16; 461 462 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 463 catcher, sig); 464 465 /* 466 * Save user context 467 */ 468 memset(&sf, 0, sizeof(sf)); 469 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 470 sf.sf_uc.uc_sigmask = *mask; 471 sf.sf_uc.uc_stack = td->td_sigstk; 472 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 473 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 474 475 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 476 477 /* 478 * Allocate and validate space for the signal handler context. 479 */ 480 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 481 SIGISMEMBER(psp->ps_sigonstack, sig)) { 482 sfp = (struct sigframe *)(td->td_sigstk.ss_sp + 483 td->td_sigstk.ss_size - rndfsize); 484 } else { 485 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); 486 } 487 488 /* 489 * Translate the signal if appropriate (Linux emu ?) 490 */ 491 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 492 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 493 494 /* 495 * Save the floating-point state, if necessary, then copy it. 496 */ 497 /* XXX */ 498 499 /* 500 * Set up the registers to return to sigcode. 501 * 502 * r1/sp - sigframe ptr 503 * lr - sig function, dispatched to by blrl in trampoline 504 * r3 - sig number 505 * r4 - SIGINFO ? &siginfo : exception code 506 * r5 - user context 507 * srr0 - trampoline function addr 508 */ 509 tf->lr = (register_t)catcher; 510 tf->fixreg[1] = (register_t)sfp; 511 tf->fixreg[FIRSTARG] = sig; 512 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; 513 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 514 /* 515 * Signal handler installed with SA_SIGINFO. 516 */ 517 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; 518 519 /* 520 * Fill siginfo structure. 521 */ 522 sf.sf_si = ksi->ksi_info; 523 sf.sf_si.si_signo = sig; 524 sf.sf_si.si_addr = (void *) ((tf->exc == EXC_DSI) ? 525 tf->dar : tf->srr0); 526 } else { 527 /* Old FreeBSD-style arguments. */ 528 tf->fixreg[FIRSTARG+1] = code; 529 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ? 530 tf->dar : tf->srr0; 531 } 532 mtx_unlock(&psp->ps_mtx); 533 PROC_UNLOCK(p); 534 535 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 536 537 /* 538 * copy the frame out to userland. 539 */ 540 if (copyout(&sf, sfp, sizeof(*sfp)) != 0) { 541 /* 542 * Process has trashed its stack. Kill it. 543 */ 544 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 545 PROC_LOCK(p); 546 sigexit(td, SIGILL); 547 } 548 549 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, 550 tf->srr0, tf->fixreg[1]); 551 552 PROC_LOCK(p); 553 mtx_lock(&psp->ps_mtx); 554 } 555 556 int 557 sigreturn(struct thread *td, struct sigreturn_args *uap) 558 { 559 struct proc *p; 560 ucontext_t uc; 561 int error; 562 563 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 564 565 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 566 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 567 return (EFAULT); 568 } 569 570 error = set_mcontext(td, &uc.uc_mcontext); 571 if (error != 0) 572 return (error); 573 574 p = td->td_proc; 575 PROC_LOCK(p); 576 td->td_sigmask = uc.uc_sigmask; 577 SIG_CANTMASK(td->td_sigmask); 578 signotify(td); 579 PROC_UNLOCK(p); 580 581 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", 582 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); 583 584 return (EJUSTRETURN); 585 } 586 587 #ifdef COMPAT_FREEBSD4 588 int 589 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 590 { 591 592 return sigreturn(td, (struct sigreturn_args *)uap); 593 } 594 #endif 595 596 /* 597 * Construct a PCB from a trapframe. This is called from kdb_trap() where 598 * we want to start a backtrace from the function that caused us to enter 599 * the debugger. We have the context in the trapframe, but base the trace 600 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 601 * enough for a backtrace. 602 */ 603 void 604 makectx(struct trapframe *tf, struct pcb *pcb) 605 { 606 607 pcb->pcb_lr = tf->srr0; 608 pcb->pcb_sp = tf->fixreg[1]; 609 } 610 611 /* 612 * get_mcontext/sendsig helper routine that doesn't touch the 613 * proc lock 614 */ 615 static int 616 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags) 617 { 618 struct pcb *pcb; 619 620 pcb = td->td_pcb; 621 622 memset(mcp, 0, sizeof(mcontext_t)); 623 624 mcp->mc_vers = _MC_VERSION; 625 mcp->mc_flags = 0; 626 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe)); 627 if (flags & GET_MC_CLEAR_RET) { 628 mcp->mc_gpr[3] = 0; 629 mcp->mc_gpr[4] = 0; 630 } 631 632 /* 633 * This assumes that floating-point context is *not* lazy, 634 * so if the thread has used FP there would have been a 635 * FP-unavailable exception that would have set things up 636 * correctly. 637 */ 638 if (pcb->pcb_flags & PCB_FPU) { 639 KASSERT(td == curthread, 640 ("get_mcontext: fp save not curthread")); 641 critical_enter(); 642 save_fpu(td); 643 critical_exit(); 644 mcp->mc_flags |= _MC_FP_VALID; 645 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double)); 646 memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double)); 647 } 648 649 /* XXX Altivec context ? */ 650 651 mcp->mc_len = sizeof(*mcp); 652 653 return (0); 654 } 655 656 int 657 get_mcontext(struct thread *td, mcontext_t *mcp, int flags) 658 { 659 int error; 660 661 error = grab_mcontext(td, mcp, flags); 662 if (error == 0) { 663 PROC_LOCK(curthread->td_proc); 664 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]); 665 PROC_UNLOCK(curthread->td_proc); 666 } 667 668 return (error); 669 } 670 671 int 672 set_mcontext(struct thread *td, const mcontext_t *mcp) 673 { 674 struct pcb *pcb; 675 struct trapframe *tf; 676 677 pcb = td->td_pcb; 678 tf = td->td_frame; 679 680 if (mcp->mc_vers != _MC_VERSION || 681 mcp->mc_len != sizeof(*mcp)) 682 return (EINVAL); 683 684 /* 685 * Don't let the user set privileged MSR bits 686 */ 687 if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) { 688 return (EINVAL); 689 } 690 691 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame)); 692 693 if (mcp->mc_flags & _MC_FP_VALID) { 694 if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) { 695 critical_enter(); 696 enable_fpu(td); 697 critical_exit(); 698 } 699 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double)); 700 memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double)); 701 } 702 703 /* XXX Altivec context? */ 704 705 return (0); 706 } 707 708 void 709 cpu_boot(int howto) 710 { 711 } 712 713 void 714 cpu_initclocks(void) 715 { 716 717 decr_init(); 718 } 719 720 /* Get current clock frequency for the given cpu id. */ 721 int 722 cpu_est_clockrate(int cpu_id, uint64_t *rate) 723 { 724 725 return (ENXIO); 726 } 727 728 /* 729 * Shutdown the CPU as much as possible. 730 */ 731 void 732 cpu_halt(void) 733 { 734 735 OF_exit(); 736 } 737 738 void 739 cpu_idle(void) 740 { 741 /* TODO: Insert code to halt (until next interrupt) */ 742 743 #ifdef INVARIANTS 744 if ((mfmsr() & PSL_EE) != PSL_EE) { 745 struct thread *td = curthread; 746 printf("td msr %x\n", td->td_md.md_saved_msr); 747 panic("ints disabled in idleproc!"); 748 } 749 #endif 750 } 751 752 /* 753 * Set set up registers on exec. 754 */ 755 void 756 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 757 { 758 struct trapframe *tf; 759 struct ps_strings arginfo; 760 761 tf = trapframe(td); 762 bzero(tf, sizeof *tf); 763 tf->fixreg[1] = -roundup(-stack + 8, 16); 764 765 /* 766 * XXX Machine-independent code has already copied arguments and 767 * XXX environment to userland. Get them back here. 768 */ 769 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); 770 771 /* 772 * Set up arguments for _start(): 773 * _start(argc, argv, envp, obj, cleanup, ps_strings); 774 * 775 * Notes: 776 * - obj and cleanup are the auxilliary and termination 777 * vectors. They are fixed up by ld.elf_so. 778 * - ps_strings is a NetBSD extention, and will be 779 * ignored by executables which are strictly 780 * compliant with the SVR4 ABI. 781 * 782 * XXX We have to set both regs and retval here due to different 783 * XXX calling convention in trap.c and init_main.c. 784 */ 785 /* 786 * XXX PG: these get overwritten in the syscall return code. 787 * execve() should return EJUSTRETURN, like it does on NetBSD. 788 * Emulate by setting the syscall return value cells. The 789 * registers still have to be set for init's fork trampoline. 790 */ 791 td->td_retval[0] = arginfo.ps_nargvstr; 792 td->td_retval[1] = (register_t)arginfo.ps_argvstr; 793 tf->fixreg[3] = arginfo.ps_nargvstr; 794 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 795 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 796 tf->fixreg[6] = 0; /* auxillary vector */ 797 tf->fixreg[7] = 0; /* termination vector */ 798 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 799 800 tf->srr0 = entry; 801 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; 802 td->td_pcb->pcb_flags = 0; 803 } 804 805 int 806 fill_regs(struct thread *td, struct reg *regs) 807 { 808 struct trapframe *tf; 809 810 tf = td->td_frame; 811 memcpy(regs, tf, sizeof(struct reg)); 812 813 return (0); 814 } 815 816 int 817 fill_dbregs(struct thread *td, struct dbreg *dbregs) 818 { 819 /* No debug registers on PowerPC */ 820 return (ENOSYS); 821 } 822 823 int 824 fill_fpregs(struct thread *td, struct fpreg *fpregs) 825 { 826 struct pcb *pcb; 827 828 pcb = td->td_pcb; 829 830 if ((pcb->pcb_flags & PCB_FPU) == 0) 831 memset(fpregs, 0, sizeof(struct fpreg)); 832 else 833 memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg)); 834 835 return (0); 836 } 837 838 int 839 set_regs(struct thread *td, struct reg *regs) 840 { 841 struct trapframe *tf; 842 843 tf = td->td_frame; 844 memcpy(tf, regs, sizeof(struct reg)); 845 846 return (0); 847 } 848 849 int 850 set_dbregs(struct thread *td, struct dbreg *dbregs) 851 { 852 /* No debug registers on PowerPC */ 853 return (ENOSYS); 854 } 855 856 int 857 set_fpregs(struct thread *td, struct fpreg *fpregs) 858 { 859 struct pcb *pcb; 860 861 pcb = td->td_pcb; 862 if ((pcb->pcb_flags & PCB_FPU) == 0) 863 enable_fpu(td); 864 memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg)); 865 866 return (0); 867 } 868 869 int 870 ptrace_set_pc(struct thread *td, unsigned long addr) 871 { 872 struct trapframe *tf; 873 874 tf = td->td_frame; 875 tf->srr0 = (register_t)addr; 876 877 return (0); 878 } 879 880 int 881 ptrace_single_step(struct thread *td) 882 { 883 struct trapframe *tf; 884 885 tf = td->td_frame; 886 tf->srr1 |= PSL_SE; 887 888 return (0); 889 } 890 891 int 892 ptrace_clear_single_step(struct thread *td) 893 { 894 struct trapframe *tf; 895 896 tf = td->td_frame; 897 tf->srr1 &= ~PSL_SE; 898 899 return (0); 900 } 901 902 /* 903 * Initialise a struct pcpu. 904 */ 905 void 906 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 907 { 908 909 } 910 911 void 912 spinlock_enter(void) 913 { 914 struct thread *td; 915 916 td = curthread; 917 if (td->td_md.md_spinlock_count == 0) 918 td->td_md.md_saved_msr = intr_disable(); 919 td->td_md.md_spinlock_count++; 920 critical_enter(); 921 } 922 923 void 924 spinlock_exit(void) 925 { 926 struct thread *td; 927 928 td = curthread; 929 critical_exit(); 930 td->td_md.md_spinlock_count--; 931 if (td->td_md.md_spinlock_count == 0) 932 intr_restore(td->td_md.md_saved_msr); 933 } 934 935 /* 936 * kcopy(const void *src, void *dst, size_t len); 937 * 938 * Copy len bytes from src to dst, aborting if we encounter a fatal 939 * page fault. 940 * 941 * kcopy() _must_ save and restore the old fault handler since it is 942 * called by uiomove(), which may be in the path of servicing a non-fatal 943 * page fault. 944 */ 945 int 946 kcopy(const void *src, void *dst, size_t len) 947 { 948 struct thread *td; 949 faultbuf env, *oldfault; 950 int rv; 951 952 td = PCPU_GET(curthread); 953 oldfault = td->td_pcb->pcb_onfault; 954 if ((rv = setfault(env)) != 0) { 955 td->td_pcb->pcb_onfault = oldfault; 956 return rv; 957 } 958 959 memcpy(dst, src, len); 960 961 td->td_pcb->pcb_onfault = oldfault; 962 return (0); 963 } 964 965 void 966 asm_panic(char *pstr) 967 { 968 panic(pstr); 969 } 970 971 int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */ 972 973 int 974 db_trap_glue(struct trapframe *frame) 975 { 976 if (!(frame->srr1 & PSL_PR) 977 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC 978 || (frame->exc == EXC_PGM 979 && (frame->srr1 & 0x20000)) 980 || frame->exc == EXC_BPT 981 || frame->exc == EXC_DSI)) { 982 int type = frame->exc; 983 if (type == EXC_PGM && (frame->srr1 & 0x20000)) { 984 type = T_BREAKPOINT; 985 } 986 return (kdb_trap(type, 0, frame)); 987 } 988 989 return (0); 990 } 991