machdep.c revision 142771
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: head/sys/powerpc/aim/machdep.c 142771 2005-02-28 09:49:00Z grehan $"); 59 60#include "opt_compat.h" 61#include "opt_ddb.h" 62#include "opt_kstack_pages.h" 63#include "opt_msgbuf.h" 64 65#include <sys/param.h> 66#include <sys/proc.h> 67#include <sys/systm.h> 68#include <sys/bio.h> 69#include <sys/buf.h> 70#include <sys/bus.h> 71#include <sys/cons.h> 72#include <sys/cpu.h> 73#include <sys/eventhandler.h> 74#include <sys/exec.h> 75#include <sys/imgact.h> 76#include <sys/kdb.h> 77#include <sys/kernel.h> 78#include <sys/ktr.h> 79#include <sys/linker.h> 80#include <sys/lock.h> 81#include <sys/malloc.h> 82#include <sys/mbuf.h> 83#include <sys/msgbuf.h> 84#include <sys/mutex.h> 85#include <sys/ptrace.h> 86#include <sys/reboot.h> 87#include <sys/signalvar.h> 88#include <sys/sysctl.h> 89#include <sys/sysent.h> 90#include <sys/sysproto.h> 91#include <sys/ucontext.h> 92#include <sys/uio.h> 93#include <sys/vmmeter.h> 94#include <sys/vnode.h> 95 96#include <net/netisr.h> 97 98#include <vm/vm.h> 99#include <vm/vm_extern.h> 100#include <vm/vm_kern.h> 101#include <vm/vm_page.h> 102#include <vm/vm_map.h> 103#include <vm/vm_object.h> 104#include <vm/vm_pager.h> 105 106#include <machine/bat.h> 107#include <machine/clock.h> 108#include <machine/cpu.h> 109#include <machine/elf.h> 110#include <machine/fpu.h> 111#include <machine/md_var.h> 112#include <machine/metadata.h> 113#include <machine/pcb.h> 114#include <machine/powerpc.h> 115#include <machine/reg.h> 116#include <machine/sigframe.h> 117#include <machine/trap.h> 118#include <machine/vmparam.h> 119 120#include <ddb/ddb.h> 121 122#include <dev/ofw/openfirm.h> 123 124#ifdef DDB 125extern vm_offset_t ksym_start, ksym_end; 126#endif 127 128int cold = 1; 129 130struct pcpu __pcpu[MAXCPU]; 131struct trapframe frame0; 132 133vm_offset_t kstack0; 134vm_offset_t kstack0_phys; 135 136char machine[] = "powerpc"; 137SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 138 139static char model[128]; 140SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, model, 0, ""); 141 142static int cacheline_size = CACHELINESIZE; 143SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 144 CTLFLAG_RD, &cacheline_size, 0, ""); 145 146static void cpu_startup(void *); 147SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL) 148 149void powerpc_init(u_int, u_int, u_int, void *); 150 151int save_ofw_mapping(void); 152int restore_ofw_mapping(void); 153 154void install_extint(void (*)(void)); 155 156int setfault(faultbuf); /* defined in locore.S */ 157 158static int grab_mcontext(struct thread *, mcontext_t *, int); 159 160void asm_panic(char *); 161 162long Maxmem = 0; 163 164struct pmap ofw_pmap; 165extern int ofmsr; 166 167struct bat battable[16]; 168 169struct kva_md_info kmi; 170 171static void 172powerpc_ofw_shutdown(void *junk, int howto) 173{ 174 if (howto & RB_HALT) { 175 OF_halt(); 176 } 177 OF_reboot(); 178} 179 180static void 181cpu_startup(void *dummy) 182{ 183 184 /* 185 * Initialise the decrementer-based clock. 186 */ 187 decr_init(); 188 189 /* 190 * Good {morning,afternoon,evening,night}. 191 */ 192 cpu_setup(PCPU_GET(cpuid)); 193 194 /* startrtclock(); */ 195#ifdef PERFMON 196 perfmon_init(); 197#endif 198 printf("real memory = %ld (%ld MB)\n", ptoa(Maxmem), 199 ptoa(Maxmem) / 1048576); 200 201 /* 202 * Display any holes after the first chunk of extended memory. 203 */ 204 if (bootverbose) { 205 int indx; 206 207 printf("Physical memory chunk(s):\n"); 208 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 209 int size1 = phys_avail[indx + 1] - phys_avail[indx]; 210 211 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", 212 phys_avail[indx], phys_avail[indx + 1] - 1, size1, 213 size1 / PAGE_SIZE); 214 } 215 } 216 217 vm_ksubmap_init(&kmi); 218 219 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 220 ptoa(cnt.v_free_count) / 1048576); 221 222 /* 223 * Set up buffers, so they can be used to read disk labels. 224 */ 225 bufinit(); 226 vm_pager_bufferinit(); 227 228 EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0, 229 SHUTDOWN_PRI_LAST); 230 231#ifdef SMP 232 /* 233 * OK, enough kmem_alloc/malloc state should be up, lets get on with it! 234 */ 235 mp_start(); /* fire up the secondaries */ 236 mp_announce(); 237#endif /* SMP */ 238} 239 240extern char kernel_text[], _end[]; 241 242extern void *trapcode, *trapsize; 243extern void *alitrap, *alisize; 244extern void *dsitrap, *dsisize; 245extern void *decrint, *decrsize; 246extern void *extint, *extsize; 247extern void *dblow, *dbsize; 248 249void 250powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp) 251{ 252 struct pcpu *pc; 253 vm_offset_t end, off; 254 void *kmdp; 255 char *env; 256 257 end = 0; 258 kmdp = NULL; 259 260 /* 261 * Parse metadata if present and fetch parameters. Must be done 262 * before console is inited so cninit gets the right value of 263 * boothowto. 264 */ 265 if (mdp != NULL) { 266 preload_metadata = mdp; 267 kmdp = preload_search_by_type("elf kernel"); 268 if (kmdp != NULL) { 269 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 270 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 271 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 272#ifdef DDB 273 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 274 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 275#endif 276 } 277 } 278 279 /* 280 * Init params/tunables that can be overridden by the loader 281 */ 282 init_param1(); 283 284 /* 285 * Start initializing proc0 and thread0. 286 */ 287 proc_linkup(&proc0, &ksegrp0, &thread0); 288 thread0.td_frame = &frame0; 289 290 /* 291 * Set up per-cpu data. 292 */ 293 pc = &__pcpu[0]; 294 pcpu_init(pc, 0, sizeof(struct pcpu)); 295 pc->pc_curthread = &thread0; 296 pc->pc_curpcb = thread0.td_pcb; 297 pc->pc_cpuid = 0; 298 299 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 300 301 mutex_init(); 302 303 /* 304 * Initialize the console before printing anything. 305 */ 306 cninit(); 307 308 /* 309 * Complain if there is no metadata. 310 */ 311 if (mdp == NULL || kmdp == NULL) { 312 printf("powerpc_init: no loader metadata.\n"); 313 } 314 315 kdb_init(); 316 317 /* 318 * XXX: Initialize the interrupt tables. 319 * Disable translation in case the vector area 320 * hasn't been mapped (G5) 321 */ 322 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR)); 323 isync(); 324 bcopy(&trapcode, (void *)EXC_RST, (size_t)&trapsize); 325 bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize); 326 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); 327 bcopy(&trapcode, (void *)EXC_ISI, (size_t)&trapsize); 328 bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize); 329 bcopy(&trapcode, (void *)EXC_ALI, (size_t)&trapsize); 330 bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize); 331 bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize); 332 bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize); 333 bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize); 334 bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize); 335 bcopy(&trapcode, (void *)EXC_FPA, (size_t)&trapsize); 336 bcopy(&trapcode, (void *)EXC_THRM, (size_t)&trapsize); 337 bcopy(&trapcode, (void *)EXC_BPT, (size_t)&trapsize); 338#ifdef KDB 339 bcopy(&dblow, (void *)EXC_RST, (size_t)&dbsize); 340 bcopy(&dblow, (void *)EXC_MCHK, (size_t)&dbsize); 341 bcopy(&dblow, (void *)EXC_PGM, (size_t)&dbsize); 342 bcopy(&dblow, (void *)EXC_TRC, (size_t)&dbsize); 343 bcopy(&dblow, (void *)EXC_BPT, (size_t)&dbsize); 344#endif 345 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 346 347 /* 348 * Make sure translation has been enabled 349 */ 350 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI); 351 isync(); 352 353 /* 354 * Initialise virtual memory. 355 */ 356 pmap_bootstrap(startkernel, endkernel); 357 358 /* 359 * Initialize params/tunables that are derived from memsize 360 */ 361 init_param2(physmem); 362 363 /* 364 * Grab booted kernel's name 365 */ 366 env = getenv("kernelname"); 367 if (env != NULL) { 368 strlcpy(kernelname, env, sizeof(kernelname)); 369 freeenv(env); 370 } 371 372 /* 373 * Finish setting up thread0. 374 */ 375 thread0.td_kstack = kstack0; 376 thread0.td_pcb = (struct pcb *) 377 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 378 379 /* 380 * Map and initialise the message buffer. 381 */ 382 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 383 pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off); 384 msgbufinit(msgbufp, MSGBUF_SIZE); 385 386#ifdef KDB 387 if (boothowto & RB_KDB) 388 kdb_enter("Boot flags requested debugger"); 389#endif 390} 391 392void 393bzero(void *buf, size_t len) 394{ 395 caddr_t p; 396 397 p = buf; 398 399 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 400 *p++ = 0; 401 len--; 402 } 403 404 while (len >= sizeof(u_long) * 8) { 405 *(u_long*) p = 0; 406 *((u_long*) p + 1) = 0; 407 *((u_long*) p + 2) = 0; 408 *((u_long*) p + 3) = 0; 409 len -= sizeof(u_long) * 8; 410 *((u_long*) p + 4) = 0; 411 *((u_long*) p + 5) = 0; 412 *((u_long*) p + 6) = 0; 413 *((u_long*) p + 7) = 0; 414 p += sizeof(u_long) * 8; 415 } 416 417 while (len >= sizeof(u_long)) { 418 *(u_long*) p = 0; 419 len -= sizeof(u_long); 420 p += sizeof(u_long); 421 } 422 423 while (len) { 424 *p++ = 0; 425 len--; 426 } 427} 428 429void 430sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code) 431{ 432 struct trapframe *tf; 433 struct sigframe *sfp; 434 struct sigacts *psp; 435 struct sigframe sf; 436 struct thread *td; 437 struct proc *p; 438 int oonstack, rndfsize; 439 440 td = curthread; 441 p = td->td_proc; 442 PROC_LOCK_ASSERT(p, MA_OWNED); 443 psp = p->p_sigacts; 444 mtx_assert(&psp->ps_mtx, MA_OWNED); 445 tf = td->td_frame; 446 oonstack = sigonstack(tf->fixreg[1]); 447 448 rndfsize = ((sizeof(sf) + 15) / 16) * 16; 449 450 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 451 catcher, sig); 452 453 /* 454 * Save user context 455 */ 456 memset(&sf, 0, sizeof(sf)); 457 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 458 sf.sf_uc.uc_sigmask = *mask; 459 sf.sf_uc.uc_stack = td->td_sigstk; 460 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 461 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 462 463 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 464 465 /* 466 * Allocate and validate space for the signal handler context. 467 */ 468 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 469 SIGISMEMBER(psp->ps_sigonstack, sig)) { 470 sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp + 471 td->td_sigstk.ss_size - rndfsize); 472 } else { 473 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); 474 } 475 476 /* 477 * Translate the signal if appropriate (Linux emu ?) 478 */ 479 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 480 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 481 482 /* 483 * Save the floating-point state, if necessary, then copy it. 484 */ 485 /* XXX */ 486 487 /* 488 * Set up the registers to return to sigcode. 489 * 490 * r1/sp - sigframe ptr 491 * lr - sig function, dispatched to by blrl in trampoline 492 * r3 - sig number 493 * r4 - SIGINFO ? &siginfo : exception code 494 * r5 - user context 495 * srr0 - trampoline function addr 496 */ 497 tf->lr = (register_t)catcher; 498 tf->fixreg[1] = (register_t)sfp; 499 tf->fixreg[FIRSTARG] = sig; 500 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; 501 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 502 /* 503 * Signal handler installed with SA_SIGINFO. 504 */ 505 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; 506 507 /* 508 * Fill siginfo structure. 509 */ 510 sf.sf_si.si_signo = sig; 511 sf.sf_si.si_code = code; 512 sf.sf_si.si_addr = (void *)tf->srr0; 513 } else { 514 /* Old FreeBSD-style arguments. */ 515 tf->fixreg[FIRSTARG+1] = code; 516 } 517 mtx_unlock(&psp->ps_mtx); 518 PROC_UNLOCK(p); 519 520 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 521 522 /* 523 * copy the frame out to userland. 524 */ 525 if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) { 526 /* 527 * Process has trashed its stack. Kill it. 528 */ 529 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 530 PROC_LOCK(p); 531 sigexit(td, SIGILL); 532 } 533 534 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, 535 tf->srr0, tf->fixreg[1]); 536 537 PROC_LOCK(p); 538 mtx_lock(&psp->ps_mtx); 539} 540 541/* 542 * Build siginfo_t for SA thread 543 */ 544void 545cpu_thread_siginfo(int sig, u_long code, siginfo_t *si) 546{ 547 struct proc *p; 548 struct thread *td; 549 550 td = curthread; 551 p = td->td_proc; 552 PROC_LOCK_ASSERT(p, MA_OWNED); 553 554 bzero(si, sizeof(*si)); 555 si->si_signo = sig; 556 si->si_code = code; 557 /* XXXKSE fill other fields */ 558} 559 560int 561sigreturn(struct thread *td, struct sigreturn_args *uap) 562{ 563 struct proc *p; 564 ucontext_t uc; 565 int error; 566 567 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 568 569 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 570 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 571 return (EFAULT); 572 } 573 574 error = set_mcontext(td, &uc.uc_mcontext); 575 if (error != 0) 576 return (error); 577 578 p = td->td_proc; 579 PROC_LOCK(p); 580 td->td_sigmask = uc.uc_sigmask; 581 SIG_CANTMASK(td->td_sigmask); 582 signotify(td); 583 PROC_UNLOCK(p); 584 585 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", 586 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); 587 588 return (EJUSTRETURN); 589} 590 591#ifdef COMPAT_FREEBSD4 592int 593freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 594{ 595 596 return sigreturn(td, (struct sigreturn_args *)uap); 597} 598#endif 599 600/* 601 * Construct a PCB from a trapframe. This is called from kdb_trap() where 602 * we want to start a backtrace from the function that caused us to enter 603 * the debugger. We have the context in the trapframe, but base the trace 604 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 605 * enough for a backtrace. 606 */ 607void 608makectx(struct trapframe *tf, struct pcb *pcb) 609{ 610 611 pcb->pcb_lr = tf->srr0; 612 pcb->pcb_sp = tf->fixreg[1]; 613} 614 615/* 616 * get_mcontext/sendsig helper routine that doesn't touch the 617 * proc lock 618 */ 619static int 620grab_mcontext(struct thread *td, mcontext_t *mcp, int flags) 621{ 622 struct pcb *pcb; 623 624 pcb = td->td_pcb; 625 626 memset(mcp, 0, sizeof(mcontext_t)); 627 628 mcp->mc_vers = _MC_VERSION; 629 mcp->mc_flags = 0; 630 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe)); 631 if (flags & GET_MC_CLEAR_RET) { 632 mcp->mc_gpr[3] = 0; 633 mcp->mc_gpr[4] = 0; 634 } 635 636 /* 637 * This assumes that floating-point context is *not* lazy, 638 * so if the thread has used FP there would have been a 639 * FP-unavailable exception that would have set things up 640 * correctly. 641 */ 642 if (pcb->pcb_flags & PCB_FPU) { 643 KASSERT(td == curthread, 644 ("get_mcontext: fp save not curthread")); 645 critical_enter(); 646 save_fpu(td); 647 critical_exit(); 648 mcp->mc_flags |= _MC_FP_VALID; 649 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double)); 650 memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double)); 651 } 652 653 /* XXX Altivec context ? */ 654 655 mcp->mc_len = sizeof(*mcp); 656 657 return (0); 658} 659 660int 661get_mcontext(struct thread *td, mcontext_t *mcp, int flags) 662{ 663 int error; 664 665 error = grab_mcontext(td, mcp, flags); 666 if (error == 0) { 667 PROC_LOCK(curthread->td_proc); 668 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]); 669 PROC_UNLOCK(curthread->td_proc); 670 } 671 672 return (error); 673} 674 675int 676set_mcontext(struct thread *td, const mcontext_t *mcp) 677{ 678 struct pcb *pcb; 679 struct trapframe *tf; 680 681 pcb = td->td_pcb; 682 tf = td->td_frame; 683 684 if (mcp->mc_vers != _MC_VERSION || 685 mcp->mc_len != sizeof(*mcp)) 686 return (EINVAL); 687 688 /* 689 * Don't let the user set privileged MSR bits 690 */ 691 if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) { 692 return (EINVAL); 693 } 694 695 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame)); 696 697 if (mcp->mc_flags & _MC_FP_VALID) { 698 if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) { 699 critical_enter(); 700 enable_fpu(td); 701 critical_exit(); 702 } 703 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double)); 704 memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double)); 705 } 706 707 /* XXX Altivec context? */ 708 709 return (0); 710} 711 712void 713cpu_boot(int howto) 714{ 715} 716 717/* Get current clock frequency for the given cpu id. */ 718int 719cpu_est_clockrate(int cpu_id, uint64_t *rate) 720{ 721 722 return (ENXIO); 723} 724 725/* 726 * Shutdown the CPU as much as possible. 727 */ 728void 729cpu_halt(void) 730{ 731 732 OF_exit(); 733} 734 735void 736cpu_idle(void) 737{ 738 /* TODO: Insert code to halt (until next interrupt) */ 739 740#ifdef INVARIANTS 741 if ((mfmsr() & PSL_EE) != PSL_EE) { 742 struct thread *td = curthread; 743 printf("td crit %x\n", td->td_md.md_savecrit); 744 panic("ints disabled in idleproc!"); 745 } 746#endif 747} 748 749/* 750 * Set set up registers on exec. 751 */ 752void 753exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 754{ 755 struct trapframe *tf; 756 struct ps_strings arginfo; 757 758 tf = trapframe(td); 759 bzero(tf, sizeof *tf); 760 tf->fixreg[1] = -roundup(-stack + 8, 16); 761 762 /* 763 * XXX Machine-independent code has already copied arguments and 764 * XXX environment to userland. Get them back here. 765 */ 766 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); 767 768 /* 769 * Set up arguments for _start(): 770 * _start(argc, argv, envp, obj, cleanup, ps_strings); 771 * 772 * Notes: 773 * - obj and cleanup are the auxilliary and termination 774 * vectors. They are fixed up by ld.elf_so. 775 * - ps_strings is a NetBSD extention, and will be 776 * ignored by executables which are strictly 777 * compliant with the SVR4 ABI. 778 * 779 * XXX We have to set both regs and retval here due to different 780 * XXX calling convention in trap.c and init_main.c. 781 */ 782 /* 783 * XXX PG: these get overwritten in the syscall return code. 784 * execve() should return EJUSTRETURN, like it does on NetBSD. 785 * Emulate by setting the syscall return value cells. The 786 * registers still have to be set for init's fork trampoline. 787 */ 788 td->td_retval[0] = arginfo.ps_nargvstr; 789 td->td_retval[1] = (register_t)arginfo.ps_argvstr; 790 tf->fixreg[3] = arginfo.ps_nargvstr; 791 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 792 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 793 tf->fixreg[6] = 0; /* auxillary vector */ 794 tf->fixreg[7] = 0; /* termination vector */ 795 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 796 797 tf->srr0 = entry; 798 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; 799 td->td_pcb->pcb_flags = 0; 800} 801 802int 803fill_regs(struct thread *td, struct reg *regs) 804{ 805 struct trapframe *tf; 806 807 tf = td->td_frame; 808 memcpy(regs, tf, sizeof(struct reg)); 809 810 return (0); 811} 812 813int 814fill_dbregs(struct thread *td, struct dbreg *dbregs) 815{ 816 /* No debug registers on PowerPC */ 817 return (ENOSYS); 818} 819 820int 821fill_fpregs(struct thread *td, struct fpreg *fpregs) 822{ 823 struct pcb *pcb; 824 825 pcb = td->td_pcb; 826 827 if ((pcb->pcb_flags & PCB_FPU) == 0) 828 memset(fpregs, 0, sizeof(struct fpreg)); 829 else 830 memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg)); 831 832 return (0); 833} 834 835int 836set_regs(struct thread *td, struct reg *regs) 837{ 838 struct trapframe *tf; 839 840 tf = td->td_frame; 841 memcpy(tf, regs, sizeof(struct reg)); 842 843 return (0); 844} 845 846int 847set_dbregs(struct thread *td, struct dbreg *dbregs) 848{ 849 /* No debug registers on PowerPC */ 850 return (ENOSYS); 851} 852 853int 854set_fpregs(struct thread *td, struct fpreg *fpregs) 855{ 856 struct pcb *pcb; 857 858 pcb = td->td_pcb; 859 if ((pcb->pcb_flags & PCB_FPU) == 0) 860 enable_fpu(td); 861 memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg)); 862 863 return (0); 864} 865 866int 867ptrace_set_pc(struct thread *td, unsigned long addr) 868{ 869 struct trapframe *tf; 870 871 tf = td->td_frame; 872 tf->srr0 = (register_t)addr; 873 874 return (0); 875} 876 877int 878ptrace_single_step(struct thread *td) 879{ 880 struct trapframe *tf; 881 882 tf = td->td_frame; 883 tf->srr1 |= PSL_SE; 884 885 return (0); 886} 887 888int 889ptrace_clear_single_step(struct thread *td) 890{ 891 struct trapframe *tf; 892 893 tf = td->td_frame; 894 tf->srr1 &= ~PSL_SE; 895 896 return (0); 897} 898 899/* 900 * Initialise a struct pcpu. 901 */ 902void 903cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 904{ 905 906} 907 908/* 909 * kcopy(const void *src, void *dst, size_t len); 910 * 911 * Copy len bytes from src to dst, aborting if we encounter a fatal 912 * page fault. 913 * 914 * kcopy() _must_ save and restore the old fault handler since it is 915 * called by uiomove(), which may be in the path of servicing a non-fatal 916 * page fault. 917 */ 918int 919kcopy(const void *src, void *dst, size_t len) 920{ 921 struct thread *td; 922 faultbuf env, *oldfault; 923 int rv; 924 925 td = PCPU_GET(curthread); 926 oldfault = td->td_pcb->pcb_onfault; 927 if ((rv = setfault(env)) != 0) { 928 td->td_pcb->pcb_onfault = oldfault; 929 return rv; 930 } 931 932 memcpy(dst, src, len); 933 934 td->td_pcb->pcb_onfault = oldfault; 935 return (0); 936} 937 938void 939asm_panic(char *pstr) 940{ 941 panic(pstr); 942} 943 944int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */ 945 946int 947db_trap_glue(struct trapframe *frame) 948{ 949 if (!(frame->srr1 & PSL_PR) 950 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC 951 || (frame->exc == EXC_PGM 952 && (frame->srr1 & 0x20000)) 953 || frame->exc == EXC_BPT 954 || frame->exc == EXC_DSI)) { 955 int type = frame->exc; 956 if (type == EXC_PGM && (frame->srr1 & 0x20000)) { 957 type = T_BREAKPOINT; 958 } 959 return (kdb_trap(type, 0, frame)); 960 } 961 962 return (0); 963} 964