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