machdep.c revision 174898
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 174898 2007-12-25 17:52:02Z rwatson $"); 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 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 int cacheline_size = CACHELINESIZE; 140SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 141 CTLFLAG_RD, &cacheline_size, 0, ""); 142 143static void cpu_startup(void *); 144SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL) 145 146void powerpc_init(u_int, u_int, u_int, void *); 147 148int save_ofw_mapping(void); 149int restore_ofw_mapping(void); 150 151void install_extint(void (*)(void)); 152 153int setfault(faultbuf); /* defined in locore.S */ 154 155static int grab_mcontext(struct thread *, mcontext_t *, int); 156 157void asm_panic(char *); 158 159long Maxmem = 0; 160long realmem = 0; 161 162struct pmap ofw_pmap; 163extern int ofmsr; 164 165struct bat battable[16]; 166 167struct kva_md_info kmi; 168 169void setPQL2(int *const size, int *const ways); 170 171void 172setPQL2(int *const size, int *const ways) 173{ 174 return; 175} 176 177static void 178powerpc_ofw_shutdown(void *junk, int howto) 179{ 180 if (howto & RB_HALT) { 181 OF_halt(); 182 } 183 OF_reboot(); 184} 185 186static void 187cpu_startup(void *dummy) 188{ 189 190 /* 191 * Initialise the decrementer-based clock. 192 */ 193 decr_init(); 194 195 /* 196 * Good {morning,afternoon,evening,night}. 197 */ 198 cpu_setup(PCPU_GET(cpuid)); 199 200 /* startrtclock(); */ 201#ifdef PERFMON 202 perfmon_init(); 203#endif 204 printf("real memory = %ld (%ld MB)\n", ptoa(physmem), 205 ptoa(physmem) / 1048576); 206 realmem = physmem; 207 208 /* 209 * Display any holes after the first chunk of extended memory. 210 */ 211 if (bootverbose) { 212 int indx; 213 214 printf("Physical memory chunk(s):\n"); 215 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 216 int size1 = phys_avail[indx + 1] - phys_avail[indx]; 217 218 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", 219 phys_avail[indx], phys_avail[indx + 1] - 1, size1, 220 size1 / PAGE_SIZE); 221 } 222 } 223 224 vm_ksubmap_init(&kmi); 225 226 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 227 ptoa(cnt.v_free_count) / 1048576); 228 229 /* 230 * Set up buffers, so they can be used to read disk labels. 231 */ 232 bufinit(); 233 vm_pager_bufferinit(); 234 235 EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0, 236 SHUTDOWN_PRI_LAST); 237 238#ifdef SMP 239 /* 240 * OK, enough kmem_alloc/malloc state should be up, lets get on with it! 241 */ 242 mp_start(); /* fire up the secondaries */ 243 mp_announce(); 244#endif /* SMP */ 245} 246 247extern char kernel_text[], _end[]; 248 249extern void *trapcode, *trapsize; 250extern void *alitrap, *alisize; 251extern void *dsitrap, *dsisize; 252extern void *decrint, *decrsize; 253extern void *extint, *extsize; 254extern void *dblow, *dbsize; 255extern void *vectrap, *vectrapsize; 256 257void 258powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp) 259{ 260 struct pcpu *pc; 261 vm_offset_t end, off; 262 void *kmdp; 263 char *env; 264 265 end = 0; 266 kmdp = NULL; 267 268 /* 269 * Parse metadata if present and fetch parameters. Must be done 270 * before console is inited so cninit gets the right value of 271 * boothowto. 272 */ 273 if (mdp != NULL) { 274 preload_metadata = mdp; 275 kmdp = preload_search_by_type("elf kernel"); 276 if (kmdp != NULL) { 277 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 278 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 279 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 280#ifdef DDB 281 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 282 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 283#endif 284 } 285 } 286 287 /* 288 * Init params/tunables that can be overridden by the loader 289 */ 290 init_param1(); 291 292 /* 293 * Start initializing proc0 and thread0. 294 */ 295 proc_linkup0(&proc0, &thread0); 296 thread0.td_frame = &frame0; 297 298 /* 299 * Set up per-cpu data. 300 */ 301 pc = &__pcpu[0]; 302 pcpu_init(pc, 0, sizeof(struct pcpu)); 303 pc->pc_curthread = &thread0; 304 pc->pc_curpcb = thread0.td_pcb; 305 pc->pc_cpuid = 0; 306 307 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 308 309 mutex_init(); 310 311 /* 312 * Initialize the console before printing anything. 313 */ 314 cninit(); 315 316 /* 317 * Complain if there is no metadata. 318 */ 319 if (mdp == NULL || kmdp == NULL) { 320 printf("powerpc_init: no loader metadata.\n"); 321 } 322 323 kdb_init(); 324 325 kobj_machdep_init(); 326 327 /* 328 * XXX: Initialize the interrupt tables. 329 * Disable translation in case the vector area 330 * hasn't been mapped (G5) 331 */ 332 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR)); 333 isync(); 334 bcopy(&trapcode, (void *)EXC_RST, (size_t)&trapsize); 335 bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize); 336 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); 337 bcopy(&trapcode, (void *)EXC_ISI, (size_t)&trapsize); 338 bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize); 339 bcopy(&alitrap, (void *)EXC_ALI, (size_t)&alisize); 340 bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize); 341 bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize); 342 bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize); 343 bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize); 344 bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize); 345 bcopy(&trapcode, (void *)EXC_FPA, (size_t)&trapsize); 346 bcopy(&vectrap, (void *)EXC_VEC, (size_t)&vectrapsize); 347 bcopy(&trapcode, (void *)EXC_VECAST, (size_t)&trapsize); 348 bcopy(&trapcode, (void *)EXC_THRM, (size_t)&trapsize); 349 bcopy(&trapcode, (void *)EXC_BPT, (size_t)&trapsize); 350#ifdef KDB 351 bcopy(&dblow, (void *)EXC_RST, (size_t)&dbsize); 352 bcopy(&dblow, (void *)EXC_MCHK, (size_t)&dbsize); 353 bcopy(&dblow, (void *)EXC_PGM, (size_t)&dbsize); 354 bcopy(&dblow, (void *)EXC_TRC, (size_t)&dbsize); 355 bcopy(&dblow, (void *)EXC_BPT, (size_t)&dbsize); 356#endif 357 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 358 359 /* 360 * Make sure translation has been enabled 361 */ 362 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI); 363 isync(); 364 365 /* 366 * Initialise virtual memory. 367 */ 368 pmap_mmu_install(MMU_TYPE_OEA, 0); /* XXX temporary */ 369 pmap_bootstrap(startkernel, endkernel); 370 371 /* 372 * Initialize params/tunables that are derived from memsize 373 */ 374 init_param2(physmem); 375 376 /* 377 * Grab booted kernel's name 378 */ 379 env = getenv("kernelname"); 380 if (env != NULL) { 381 strlcpy(kernelname, env, sizeof(kernelname)); 382 freeenv(env); 383 } 384 385 /* 386 * Finish setting up thread0. 387 */ 388 thread0.td_kstack = kstack0; 389 thread0.td_pcb = (struct pcb *) 390 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 391 392 /* 393 * Map and initialise the message buffer. 394 */ 395 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 396 pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off); 397 msgbufinit(msgbufp, MSGBUF_SIZE); 398 399#ifdef KDB 400 if (boothowto & RB_KDB) 401 kdb_enter(KDB_WHY_BOOTFLAGS, 402 "Boot flags requested debugger"); 403#endif 404} 405 406void 407bzero(void *buf, size_t len) 408{ 409 caddr_t p; 410 411 p = buf; 412 413 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 414 *p++ = 0; 415 len--; 416 } 417 418 while (len >= sizeof(u_long) * 8) { 419 *(u_long*) p = 0; 420 *((u_long*) p + 1) = 0; 421 *((u_long*) p + 2) = 0; 422 *((u_long*) p + 3) = 0; 423 len -= sizeof(u_long) * 8; 424 *((u_long*) p + 4) = 0; 425 *((u_long*) p + 5) = 0; 426 *((u_long*) p + 6) = 0; 427 *((u_long*) p + 7) = 0; 428 p += sizeof(u_long) * 8; 429 } 430 431 while (len >= sizeof(u_long)) { 432 *(u_long*) p = 0; 433 len -= sizeof(u_long); 434 p += sizeof(u_long); 435 } 436 437 while (len) { 438 *p++ = 0; 439 len--; 440 } 441} 442 443void 444sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 445{ 446 struct trapframe *tf; 447 struct sigframe *sfp; 448 struct sigacts *psp; 449 struct sigframe sf; 450 struct thread *td; 451 struct proc *p; 452 int oonstack, rndfsize; 453 int sig; 454 int code; 455 456 td = curthread; 457 p = td->td_proc; 458 PROC_LOCK_ASSERT(p, MA_OWNED); 459 sig = ksi->ksi_signo; 460 code = ksi->ksi_code; 461 psp = p->p_sigacts; 462 mtx_assert(&psp->ps_mtx, MA_OWNED); 463 tf = td->td_frame; 464 oonstack = sigonstack(tf->fixreg[1]); 465 466 rndfsize = ((sizeof(sf) + 15) / 16) * 16; 467 468 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 469 catcher, sig); 470 471 /* 472 * Save user context 473 */ 474 memset(&sf, 0, sizeof(sf)); 475 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0); 476 sf.sf_uc.uc_sigmask = *mask; 477 sf.sf_uc.uc_stack = td->td_sigstk; 478 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 479 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; 480 481 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; 482 483 /* 484 * Allocate and validate space for the signal handler context. 485 */ 486 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && 487 SIGISMEMBER(psp->ps_sigonstack, sig)) { 488 sfp = (struct sigframe *)(td->td_sigstk.ss_sp + 489 td->td_sigstk.ss_size - rndfsize); 490 } else { 491 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); 492 } 493 494 /* 495 * Translate the signal if appropriate (Linux emu ?) 496 */ 497 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 498 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 499 500 /* 501 * Save the floating-point state, if necessary, then copy it. 502 */ 503 /* XXX */ 504 505 /* 506 * Set up the registers to return to sigcode. 507 * 508 * r1/sp - sigframe ptr 509 * lr - sig function, dispatched to by blrl in trampoline 510 * r3 - sig number 511 * r4 - SIGINFO ? &siginfo : exception code 512 * r5 - user context 513 * srr0 - trampoline function addr 514 */ 515 tf->lr = (register_t)catcher; 516 tf->fixreg[1] = (register_t)sfp; 517 tf->fixreg[FIRSTARG] = sig; 518 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; 519 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 520 /* 521 * Signal handler installed with SA_SIGINFO. 522 */ 523 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; 524 525 /* 526 * Fill siginfo structure. 527 */ 528 sf.sf_si = ksi->ksi_info; 529 sf.sf_si.si_signo = sig; 530 sf.sf_si.si_addr = (void *) ((tf->exc == EXC_DSI) ? 531 tf->dar : tf->srr0); 532 } else { 533 /* Old FreeBSD-style arguments. */ 534 tf->fixreg[FIRSTARG+1] = code; 535 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ? 536 tf->dar : tf->srr0; 537 } 538 mtx_unlock(&psp->ps_mtx); 539 PROC_UNLOCK(p); 540 541 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 542 543 /* 544 * copy the frame out to userland. 545 */ 546 if (copyout(&sf, sfp, sizeof(*sfp)) != 0) { 547 /* 548 * Process has trashed its stack. Kill it. 549 */ 550 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); 551 PROC_LOCK(p); 552 sigexit(td, SIGILL); 553 } 554 555 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, 556 tf->srr0, tf->fixreg[1]); 557 558 PROC_LOCK(p); 559 mtx_lock(&psp->ps_mtx); 560} 561 562int 563sigreturn(struct thread *td, struct sigreturn_args *uap) 564{ 565 struct proc *p; 566 ucontext_t uc; 567 int error; 568 569 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); 570 571 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { 572 CTR1(KTR_SIG, "sigreturn: efault td=%p", td); 573 return (EFAULT); 574 } 575 576 error = set_mcontext(td, &uc.uc_mcontext); 577 if (error != 0) 578 return (error); 579 580 p = td->td_proc; 581 PROC_LOCK(p); 582 td->td_sigmask = uc.uc_sigmask; 583 SIG_CANTMASK(td->td_sigmask); 584 signotify(td); 585 PROC_UNLOCK(p); 586 587 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", 588 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); 589 590 return (EJUSTRETURN); 591} 592 593#ifdef COMPAT_FREEBSD4 594int 595freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) 596{ 597 598 return sigreturn(td, (struct sigreturn_args *)uap); 599} 600#endif 601 602/* 603 * Construct a PCB from a trapframe. This is called from kdb_trap() where 604 * we want to start a backtrace from the function that caused us to enter 605 * the debugger. We have the context in the trapframe, but base the trace 606 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 607 * enough for a backtrace. 608 */ 609void 610makectx(struct trapframe *tf, struct pcb *pcb) 611{ 612 613 pcb->pcb_lr = tf->srr0; 614 pcb->pcb_sp = tf->fixreg[1]; 615} 616 617/* 618 * get_mcontext/sendsig helper routine that doesn't touch the 619 * proc lock 620 */ 621static int 622grab_mcontext(struct thread *td, mcontext_t *mcp, int flags) 623{ 624 struct pcb *pcb; 625 626 pcb = td->td_pcb; 627 628 memset(mcp, 0, sizeof(mcontext_t)); 629 630 mcp->mc_vers = _MC_VERSION; 631 mcp->mc_flags = 0; 632 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe)); 633 if (flags & GET_MC_CLEAR_RET) { 634 mcp->mc_gpr[3] = 0; 635 mcp->mc_gpr[4] = 0; 636 } 637 638 /* 639 * This assumes that floating-point context is *not* lazy, 640 * so if the thread has used FP there would have been a 641 * FP-unavailable exception that would have set things up 642 * correctly. 643 */ 644 if (pcb->pcb_flags & PCB_FPU) { 645 KASSERT(td == curthread, 646 ("get_mcontext: fp save not curthread")); 647 critical_enter(); 648 save_fpu(td); 649 critical_exit(); 650 mcp->mc_flags |= _MC_FP_VALID; 651 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double)); 652 memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double)); 653 } 654 655 /* XXX Altivec context ? */ 656 657 mcp->mc_len = sizeof(*mcp); 658 659 return (0); 660} 661 662int 663get_mcontext(struct thread *td, mcontext_t *mcp, int flags) 664{ 665 int error; 666 667 error = grab_mcontext(td, mcp, flags); 668 if (error == 0) { 669 PROC_LOCK(curthread->td_proc); 670 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]); 671 PROC_UNLOCK(curthread->td_proc); 672 } 673 674 return (error); 675} 676 677int 678set_mcontext(struct thread *td, const mcontext_t *mcp) 679{ 680 struct pcb *pcb; 681 struct trapframe *tf; 682 683 pcb = td->td_pcb; 684 tf = td->td_frame; 685 686 if (mcp->mc_vers != _MC_VERSION || 687 mcp->mc_len != sizeof(*mcp)) 688 return (EINVAL); 689 690 /* 691 * Don't let the user set privileged MSR bits 692 */ 693 if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) { 694 return (EINVAL); 695 } 696 697 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame)); 698 699 if (mcp->mc_flags & _MC_FP_VALID) { 700 if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) { 701 critical_enter(); 702 enable_fpu(td); 703 critical_exit(); 704 } 705 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double)); 706 memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double)); 707 } 708 709 /* XXX Altivec context? */ 710 711 return (0); 712} 713 714void 715cpu_boot(int howto) 716{ 717} 718 719void 720cpu_initclocks(void) 721{ 722 723 decr_tc_init(); 724} 725 726/* Get current clock frequency for the given cpu id. */ 727int 728cpu_est_clockrate(int cpu_id, uint64_t *rate) 729{ 730 731 return (ENXIO); 732} 733 734/* 735 * Shutdown the CPU as much as possible. 736 */ 737void 738cpu_halt(void) 739{ 740 741 OF_exit(); 742} 743 744void 745cpu_idle(void) 746{ 747 /* TODO: Insert code to halt (until next interrupt) */ 748 749#ifdef INVARIANTS 750 if ((mfmsr() & PSL_EE) != PSL_EE) { 751 struct thread *td = curthread; 752 printf("td msr %x\n", td->td_md.md_saved_msr); 753 panic("ints disabled in idleproc!"); 754 } 755#endif 756} 757 758/* 759 * Set set up registers on exec. 760 */ 761void 762exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) 763{ 764 struct trapframe *tf; 765 struct ps_strings arginfo; 766 767 tf = trapframe(td); 768 bzero(tf, sizeof *tf); 769 tf->fixreg[1] = -roundup(-stack + 8, 16); 770 771 /* 772 * XXX Machine-independent code has already copied arguments and 773 * XXX environment to userland. Get them back here. 774 */ 775 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); 776 777 /* 778 * Set up arguments for _start(): 779 * _start(argc, argv, envp, obj, cleanup, ps_strings); 780 * 781 * Notes: 782 * - obj and cleanup are the auxilliary and termination 783 * vectors. They are fixed up by ld.elf_so. 784 * - ps_strings is a NetBSD extention, and will be 785 * ignored by executables which are strictly 786 * compliant with the SVR4 ABI. 787 * 788 * XXX We have to set both regs and retval here due to different 789 * XXX calling convention in trap.c and init_main.c. 790 */ 791 /* 792 * XXX PG: these get overwritten in the syscall return code. 793 * execve() should return EJUSTRETURN, like it does on NetBSD. 794 * Emulate by setting the syscall return value cells. The 795 * registers still have to be set for init's fork trampoline. 796 */ 797 td->td_retval[0] = arginfo.ps_nargvstr; 798 td->td_retval[1] = (register_t)arginfo.ps_argvstr; 799 tf->fixreg[3] = arginfo.ps_nargvstr; 800 tf->fixreg[4] = (register_t)arginfo.ps_argvstr; 801 tf->fixreg[5] = (register_t)arginfo.ps_envstr; 802 tf->fixreg[6] = 0; /* auxillary vector */ 803 tf->fixreg[7] = 0; /* termination vector */ 804 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ 805 806 tf->srr0 = entry; 807 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; 808 td->td_pcb->pcb_flags = 0; 809} 810 811int 812fill_regs(struct thread *td, struct reg *regs) 813{ 814 struct trapframe *tf; 815 816 tf = td->td_frame; 817 memcpy(regs, tf, sizeof(struct reg)); 818 819 return (0); 820} 821 822int 823fill_dbregs(struct thread *td, struct dbreg *dbregs) 824{ 825 /* No debug registers on PowerPC */ 826 return (ENOSYS); 827} 828 829int 830fill_fpregs(struct thread *td, struct fpreg *fpregs) 831{ 832 struct pcb *pcb; 833 834 pcb = td->td_pcb; 835 836 if ((pcb->pcb_flags & PCB_FPU) == 0) 837 memset(fpregs, 0, sizeof(struct fpreg)); 838 else 839 memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg)); 840 841 return (0); 842} 843 844int 845set_regs(struct thread *td, struct reg *regs) 846{ 847 struct trapframe *tf; 848 849 tf = td->td_frame; 850 memcpy(tf, regs, sizeof(struct reg)); 851 852 return (0); 853} 854 855int 856set_dbregs(struct thread *td, struct dbreg *dbregs) 857{ 858 /* No debug registers on PowerPC */ 859 return (ENOSYS); 860} 861 862int 863set_fpregs(struct thread *td, struct fpreg *fpregs) 864{ 865 struct pcb *pcb; 866 867 pcb = td->td_pcb; 868 if ((pcb->pcb_flags & PCB_FPU) == 0) 869 enable_fpu(td); 870 memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg)); 871 872 return (0); 873} 874 875int 876ptrace_set_pc(struct thread *td, unsigned long addr) 877{ 878 struct trapframe *tf; 879 880 tf = td->td_frame; 881 tf->srr0 = (register_t)addr; 882 883 return (0); 884} 885 886int 887ptrace_single_step(struct thread *td) 888{ 889 struct trapframe *tf; 890 891 tf = td->td_frame; 892 tf->srr1 |= PSL_SE; 893 894 return (0); 895} 896 897int 898ptrace_clear_single_step(struct thread *td) 899{ 900 struct trapframe *tf; 901 902 tf = td->td_frame; 903 tf->srr1 &= ~PSL_SE; 904 905 return (0); 906} 907 908/* 909 * Initialise a struct pcpu. 910 */ 911void 912cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 913{ 914 915} 916 917void 918spinlock_enter(void) 919{ 920 struct thread *td; 921 922 td = curthread; 923 if (td->td_md.md_spinlock_count == 0) 924 td->td_md.md_saved_msr = intr_disable(); 925 td->td_md.md_spinlock_count++; 926 critical_enter(); 927} 928 929void 930spinlock_exit(void) 931{ 932 struct thread *td; 933 934 td = curthread; 935 critical_exit(); 936 td->td_md.md_spinlock_count--; 937 if (td->td_md.md_spinlock_count == 0) 938 intr_restore(td->td_md.md_saved_msr); 939} 940 941/* 942 * kcopy(const void *src, void *dst, size_t len); 943 * 944 * Copy len bytes from src to dst, aborting if we encounter a fatal 945 * page fault. 946 * 947 * kcopy() _must_ save and restore the old fault handler since it is 948 * called by uiomove(), which may be in the path of servicing a non-fatal 949 * page fault. 950 */ 951int 952kcopy(const void *src, void *dst, size_t len) 953{ 954 struct thread *td; 955 faultbuf env, *oldfault; 956 int rv; 957 958 td = PCPU_GET(curthread); 959 oldfault = td->td_pcb->pcb_onfault; 960 if ((rv = setfault(env)) != 0) { 961 td->td_pcb->pcb_onfault = oldfault; 962 return rv; 963 } 964 965 memcpy(dst, src, len); 966 967 td->td_pcb->pcb_onfault = oldfault; 968 return (0); 969} 970 971void 972asm_panic(char *pstr) 973{ 974 panic(pstr); 975} 976 977int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */ 978 979int 980db_trap_glue(struct trapframe *frame) 981{ 982 if (!(frame->srr1 & PSL_PR) 983 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC 984 || (frame->exc == EXC_PGM 985 && (frame->srr1 & 0x20000)) 986 || frame->exc == EXC_BPT 987 || frame->exc == EXC_DSI)) { 988 int type = frame->exc; 989 if (type == EXC_PGM && (frame->srr1 & 0x20000)) { 990 type = T_BREAKPOINT; 991 } 992 return (kdb_trap(type, 0, frame)); 993 } 994 995 return (0); 996} 997