machdep.c revision 217688
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 217688 2011-01-21 10:26:26Z pluknet $"); 59 60#include "opt_compat.h" 61#include "opt_ddb.h" 62#include "opt_kstack_pages.h" 63 64#include <sys/param.h> 65#include <sys/proc.h> 66#include <sys/systm.h> 67#include <sys/bio.h> 68#include <sys/buf.h> 69#include <sys/bus.h> 70#include <sys/cons.h> 71#include <sys/cpu.h> 72#include <sys/eventhandler.h> 73#include <sys/exec.h> 74#include <sys/imgact.h> 75#include <sys/kdb.h> 76#include <sys/kernel.h> 77#include <sys/ktr.h> 78#include <sys/linker.h> 79#include <sys/lock.h> 80#include <sys/malloc.h> 81#include <sys/mbuf.h> 82#include <sys/msgbuf.h> 83#include <sys/mutex.h> 84#include <sys/ptrace.h> 85#include <sys/reboot.h> 86#include <sys/signalvar.h> 87#include <sys/syscallsubr.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/altivec.h> 107#ifndef __powerpc64__ 108#include <machine/bat.h> 109#endif 110#include <machine/cpu.h> 111#include <machine/elf.h> 112#include <machine/fpu.h> 113#include <machine/hid.h> 114#include <machine/kdb.h> 115#include <machine/md_var.h> 116#include <machine/metadata.h> 117#include <machine/mmuvar.h> 118#include <machine/pcb.h> 119#include <machine/reg.h> 120#include <machine/sigframe.h> 121#include <machine/spr.h> 122#include <machine/trap.h> 123#include <machine/vmparam.h> 124 125#include <ddb/ddb.h> 126 127#include <dev/ofw/openfirm.h> 128 129#ifdef DDB 130extern vm_offset_t ksym_start, ksym_end; 131#endif 132 133int cold = 1; 134#ifdef __powerpc64__ 135int cacheline_size = 128; 136#else 137int cacheline_size = 32; 138#endif 139int hw_direct_map = 1; 140 141struct pcpu __pcpu[MAXCPU]; 142 143static struct trapframe frame0; 144 145char machine[] = "powerpc"; 146SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 147 148static void cpu_startup(void *); 149SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 150 151SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 152 CTLFLAG_RD, &cacheline_size, 0, ""); 153 154uintptr_t powerpc_init(vm_offset_t, vm_offset_t, vm_offset_t, void *); 155 156int setfault(faultbuf); /* defined in locore.S */ 157 158long Maxmem = 0; 159long realmem = 0; 160 161#ifndef __powerpc64__ 162struct bat battable[16]; 163#endif 164 165struct kva_md_info kmi; 166 167static void 168cpu_startup(void *dummy) 169{ 170 171 /* 172 * Initialise the decrementer-based clock. 173 */ 174 decr_init(); 175 176 /* 177 * Good {morning,afternoon,evening,night}. 178 */ 179 cpu_setup(PCPU_GET(cpuid)); 180 181#ifdef PERFMON 182 perfmon_init(); 183#endif 184 printf("real memory = %ld (%ld MB)\n", ptoa(physmem), 185 ptoa(physmem) / 1048576); 186 realmem = physmem; 187 188 if (bootverbose) 189 printf("available KVA = %zd (%zd MB)\n", 190 virtual_end - virtual_avail, 191 (virtual_end - virtual_avail) / 1048576); 192 193 /* 194 * Display any holes after the first chunk of extended memory. 195 */ 196 if (bootverbose) { 197 int indx; 198 199 printf("Physical memory chunk(s):\n"); 200 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 201 vm_offset_t size1 = 202 phys_avail[indx + 1] - phys_avail[indx]; 203 204 #ifdef __powerpc64__ 205 printf("0x%16lx - 0x%16lx, %ld bytes (%ld pages)\n", 206 #else 207 printf("0x%08x - 0x%08x, %d bytes (%ld pages)\n", 208 #endif 209 phys_avail[indx], phys_avail[indx + 1] - 1, size1, 210 size1 / PAGE_SIZE); 211 } 212 } 213 214 vm_ksubmap_init(&kmi); 215 216 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 217 ptoa(cnt.v_free_count) / 1048576); 218 219 /* 220 * Set up buffers, so they can be used to read disk labels. 221 */ 222 bufinit(); 223 vm_pager_bufferinit(); 224} 225 226extern char kernel_text[], _end[]; 227 228#ifndef __powerpc64__ 229/* Bits for running on 64-bit systems in 32-bit mode. */ 230extern void *testppc64, *testppc64size; 231extern void *restorebridge, *restorebridgesize; 232extern void *rfid_patch, *rfi_patch1, *rfi_patch2; 233extern void *trapcode64; 234#endif 235 236#ifdef SMP 237extern void *rstcode, *rstsize; 238#endif 239extern void *trapcode, *trapsize; 240extern void *alitrap, *alisize; 241extern void *dsitrap, *dsisize; 242extern void *decrint, *decrsize; 243extern void *extint, *extsize; 244extern void *dblow, *dbsize; 245extern void *imisstrap, *imisssize; 246extern void *dlmisstrap, *dlmisssize; 247extern void *dsmisstrap, *dsmisssize; 248 249uintptr_t 250powerpc_init(vm_offset_t startkernel, vm_offset_t endkernel, 251 vm_offset_t basekernel, void *mdp) 252{ 253 struct pcpu *pc; 254 vm_offset_t end; 255 void *generictrap; 256 size_t trap_offset; 257 void *kmdp; 258 char *env; 259 register_t msr, scratch; 260 uint8_t *cache_check; 261 int cacheline_warn; 262 #ifndef __powerpc64__ 263 int ppc64; 264 #endif 265 266 end = 0; 267 kmdp = NULL; 268 trap_offset = 0; 269 cacheline_warn = 0; 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_linkup0(&proc0, &thread0); 299 thread0.td_frame = &frame0; 300 301 /* 302 * Set up per-cpu data. 303 */ 304 pc = __pcpu; 305 pcpu_init(pc, 0, sizeof(struct pcpu)); 306 pc->pc_curthread = &thread0; 307 pc->pc_cpuid = 0; 308 309 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 310 311 /* 312 * Init mutexes, which we use heavily in PMAP 313 */ 314 315 mutex_init(); 316 317 /* 318 * Install the OF client interface 319 */ 320 321 OF_bootstrap(); 322 323 /* 324 * Initialize the console before printing anything. 325 */ 326 cninit(); 327 328 /* 329 * Complain if there is no metadata. 330 */ 331 if (mdp == NULL || kmdp == NULL) { 332 printf("powerpc_init: no loader metadata.\n"); 333 } 334 335 /* 336 * Init KDB 337 */ 338 339 kdb_init(); 340 341 /* 342 * PowerPC 970 CPUs have a misfeature requested by Apple that makes 343 * them pretend they have a 32-byte cacheline. Turn this off 344 * before we measure the cacheline size. 345 */ 346 347 switch (mfpvr() >> 16) { 348 case IBM970: 349 case IBM970FX: 350 case IBM970MP: 351 case IBM970GX: 352 scratch = mfspr(SPR_HID5); 353 scratch &= ~HID5_970_DCBZ_SIZE_HI; 354 mtspr(SPR_HID5, scratch); 355 break; 356 } 357 358 /* 359 * Initialize the interrupt tables and figure out our cache line 360 * size and whether or not we need the 64-bit bridge code. 361 */ 362 363 /* 364 * Disable translation in case the vector area hasn't been 365 * mapped (G5). Note that no OFW calls can be made until 366 * translation is re-enabled. 367 */ 368 369 msr = mfmsr(); 370 mtmsr((msr & ~(PSL_IR | PSL_DR)) | PSL_RI); 371 isync(); 372 373 /* 374 * Measure the cacheline size using dcbz 375 * 376 * Use EXC_PGM as a playground. We are about to overwrite it 377 * anyway, we know it exists, and we know it is cache-aligned. 378 */ 379 380 cache_check = (void *)EXC_PGM; 381 382 for (cacheline_size = 0; cacheline_size < 0x100; cacheline_size++) 383 cache_check[cacheline_size] = 0xff; 384 385 __asm __volatile("dcbz 0,%0":: "r" (cache_check) : "memory"); 386 387 /* Find the first byte dcbz did not zero to get the cache line size */ 388 for (cacheline_size = 0; cacheline_size < 0x100 && 389 cache_check[cacheline_size] == 0; cacheline_size++); 390 391 /* Work around psim bug */ 392 if (cacheline_size == 0) { 393 cacheline_warn = 1; 394 cacheline_size = 32; 395 } 396 397 #ifndef __powerpc64__ 398 /* 399 * Figure out whether we need to use the 64 bit PMAP. This works by 400 * executing an instruction that is only legal on 64-bit PPC (mtmsrd), 401 * and setting ppc64 = 0 if that causes a trap. 402 */ 403 404 ppc64 = 1; 405 406 bcopy(&testppc64, (void *)EXC_PGM, (size_t)&testppc64size); 407 __syncicache((void *)EXC_PGM, (size_t)&testppc64size); 408 409 __asm __volatile("\ 410 mfmsr %0; \ 411 mtsprg2 %1; \ 412 \ 413 mtmsrd %0; \ 414 mfsprg2 %1;" 415 : "=r"(scratch), "=r"(ppc64)); 416 417 if (ppc64) 418 cpu_features |= PPC_FEATURE_64; 419 420 /* 421 * Now copy restorebridge into all the handlers, if necessary, 422 * and set up the trap tables. 423 */ 424 425 if (cpu_features & PPC_FEATURE_64) { 426 /* Patch the two instances of rfi -> rfid */ 427 bcopy(&rfid_patch,&rfi_patch1,4); 428 #ifdef KDB 429 /* rfi_patch2 is at the end of dbleave */ 430 bcopy(&rfid_patch,&rfi_patch2,4); 431 #endif 432 433 /* 434 * Copy a code snippet to restore 32-bit bridge mode 435 * to the top of every non-generic trap handler 436 */ 437 438 trap_offset += (size_t)&restorebridgesize; 439 bcopy(&restorebridge, (void *)EXC_RST, trap_offset); 440 bcopy(&restorebridge, (void *)EXC_DSI, trap_offset); 441 bcopy(&restorebridge, (void *)EXC_ALI, trap_offset); 442 bcopy(&restorebridge, (void *)EXC_PGM, trap_offset); 443 bcopy(&restorebridge, (void *)EXC_MCHK, trap_offset); 444 bcopy(&restorebridge, (void *)EXC_TRC, trap_offset); 445 bcopy(&restorebridge, (void *)EXC_BPT, trap_offset); 446 447 /* 448 * Set the common trap entry point to the one that 449 * knows to restore 32-bit operation on execution. 450 */ 451 452 generictrap = &trapcode64; 453 } else { 454 generictrap = &trapcode; 455 } 456 457 #else /* powerpc64 */ 458 cpu_features |= PPC_FEATURE_64; 459 generictrap = &trapcode; 460 #endif 461 462#ifdef SMP 463 bcopy(&rstcode, (void *)(EXC_RST + trap_offset), (size_t)&rstsize); 464#else 465 bcopy(generictrap, (void *)EXC_RST, (size_t)&trapsize); 466#endif 467 468#ifdef KDB 469 bcopy(&dblow, (void *)(EXC_MCHK + trap_offset), (size_t)&dbsize); 470 bcopy(&dblow, (void *)(EXC_PGM + trap_offset), (size_t)&dbsize); 471 bcopy(&dblow, (void *)(EXC_TRC + trap_offset), (size_t)&dbsize); 472 bcopy(&dblow, (void *)(EXC_BPT + trap_offset), (size_t)&dbsize); 473#else 474 bcopy(generictrap, (void *)EXC_MCHK, (size_t)&trapsize); 475 bcopy(generictrap, (void *)EXC_PGM, (size_t)&trapsize); 476 bcopy(generictrap, (void *)EXC_TRC, (size_t)&trapsize); 477 bcopy(generictrap, (void *)EXC_BPT, (size_t)&trapsize); 478#endif 479 bcopy(&alitrap, (void *)(EXC_ALI + trap_offset), (size_t)&alisize); 480 bcopy(&dsitrap, (void *)(EXC_DSI + trap_offset), (size_t)&dsisize); 481 bcopy(generictrap, (void *)EXC_ISI, (size_t)&trapsize); 482 #ifdef __powerpc64__ 483 bcopy(generictrap, (void *)EXC_DSE, (size_t)&trapsize); 484 bcopy(generictrap, (void *)EXC_ISE, (size_t)&trapsize); 485 #endif 486 bcopy(generictrap, (void *)EXC_EXI, (size_t)&trapsize); 487 bcopy(generictrap, (void *)EXC_FPU, (size_t)&trapsize); 488 bcopy(generictrap, (void *)EXC_DECR, (size_t)&trapsize); 489 bcopy(generictrap, (void *)EXC_SC, (size_t)&trapsize); 490 bcopy(generictrap, (void *)EXC_FPA, (size_t)&trapsize); 491 bcopy(generictrap, (void *)EXC_VEC, (size_t)&trapsize); 492 bcopy(generictrap, (void *)EXC_VECAST_G4, (size_t)&trapsize); 493 bcopy(generictrap, (void *)EXC_VECAST_G5, (size_t)&trapsize); 494 #ifndef __powerpc64__ 495 /* G2-specific TLB miss helper handlers */ 496 bcopy(&imisstrap, (void *)EXC_IMISS, (size_t)&imisssize); 497 bcopy(&dlmisstrap, (void *)EXC_DLMISS, (size_t)&dlmisssize); 498 bcopy(&dsmisstrap, (void *)EXC_DSMISS, (size_t)&dsmisssize); 499 #endif 500 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 501 502 /* 503 * Restore MSR 504 */ 505 mtmsr(msr); 506 isync(); 507 508 /* Warn if cachline size was not determined */ 509 if (cacheline_warn == 1) { 510 printf("WARNING: cacheline size undetermined, setting to 32\n"); 511 } 512 513 /* 514 * Choose a platform module so we can get the physical memory map. 515 */ 516 517 platform_probe_and_attach(); 518 519 /* 520 * Initialise virtual memory. Use BUS_PROBE_GENERIC priority 521 * in case the platform module had a better idea of what we 522 * should do. 523 */ 524 if (cpu_features & PPC_FEATURE_64) 525 pmap_mmu_install(MMU_TYPE_G5, BUS_PROBE_GENERIC); 526 else 527 pmap_mmu_install(MMU_TYPE_OEA, BUS_PROBE_GENERIC); 528 529 pmap_bootstrap(startkernel, endkernel); 530 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI); 531 isync(); 532 533 /* 534 * Initialize params/tunables that are derived from memsize 535 */ 536 init_param2(physmem); 537 538 /* 539 * Grab booted kernel's name 540 */ 541 env = getenv("kernelname"); 542 if (env != NULL) { 543 strlcpy(kernelname, env, sizeof(kernelname)); 544 freeenv(env); 545 } 546 547 /* 548 * Finish setting up thread0. 549 */ 550 thread0.td_pcb = (struct pcb *) 551 ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE - 552 sizeof(struct pcb)) & ~15UL); 553 bzero((void *)thread0.td_pcb, sizeof(struct pcb)); 554 pc->pc_curpcb = thread0.td_pcb; 555 556 /* Initialise the message buffer. */ 557 msgbufinit(msgbufp, msgbufsize); 558 559#ifdef KDB 560 if (boothowto & RB_KDB) 561 kdb_enter(KDB_WHY_BOOTFLAGS, 562 "Boot flags requested debugger"); 563#endif 564 565 return (((uintptr_t)thread0.td_pcb - 566 (sizeof(struct callframe) - 3*sizeof(register_t))) & ~15UL); 567} 568 569void 570bzero(void *buf, size_t len) 571{ 572 caddr_t p; 573 574 p = buf; 575 576 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 577 *p++ = 0; 578 len--; 579 } 580 581 while (len >= sizeof(u_long) * 8) { 582 *(u_long*) p = 0; 583 *((u_long*) p + 1) = 0; 584 *((u_long*) p + 2) = 0; 585 *((u_long*) p + 3) = 0; 586 len -= sizeof(u_long) * 8; 587 *((u_long*) p + 4) = 0; 588 *((u_long*) p + 5) = 0; 589 *((u_long*) p + 6) = 0; 590 *((u_long*) p + 7) = 0; 591 p += sizeof(u_long) * 8; 592 } 593 594 while (len >= sizeof(u_long)) { 595 *(u_long*) p = 0; 596 len -= sizeof(u_long); 597 p += sizeof(u_long); 598 } 599 600 while (len) { 601 *p++ = 0; 602 len--; 603 } 604} 605 606void 607cpu_boot(int howto) 608{ 609} 610 611/* 612 * Flush the D-cache for non-DMA I/O so that the I-cache can 613 * be made coherent later. 614 */ 615void 616cpu_flush_dcache(void *ptr, size_t len) 617{ 618 /* TBD */ 619} 620 621void 622cpu_initclocks(void) 623{ 624 625 decr_tc_init(); 626 cpu_initclocks_bsp(); 627} 628 629/* 630 * Shutdown the CPU as much as possible. 631 */ 632void 633cpu_halt(void) 634{ 635 636 OF_exit(); 637} 638 639int 640ptrace_set_pc(struct thread *td, unsigned long addr) 641{ 642 struct trapframe *tf; 643 644 tf = td->td_frame; 645 tf->srr0 = (register_t)addr; 646 647 return (0); 648} 649 650int 651ptrace_single_step(struct thread *td) 652{ 653 struct trapframe *tf; 654 655 tf = td->td_frame; 656 tf->srr1 |= PSL_SE; 657 658 return (0); 659} 660 661int 662ptrace_clear_single_step(struct thread *td) 663{ 664 struct trapframe *tf; 665 666 tf = td->td_frame; 667 tf->srr1 &= ~PSL_SE; 668 669 return (0); 670} 671 672void 673kdb_cpu_clear_singlestep(void) 674{ 675 676 kdb_frame->srr1 &= ~PSL_SE; 677} 678 679void 680kdb_cpu_set_singlestep(void) 681{ 682 683 kdb_frame->srr1 |= PSL_SE; 684} 685 686/* 687 * Initialise a struct pcpu. 688 */ 689void 690cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 691{ 692#ifdef __powerpc64__ 693/* Copy the SLB contents from the current CPU */ 694memcpy(pcpu->pc_slb, PCPU_GET(slb), sizeof(pcpu->pc_slb)); 695#endif 696} 697 698void 699spinlock_enter(void) 700{ 701 struct thread *td; 702 register_t msr; 703 704 td = curthread; 705 if (td->td_md.md_spinlock_count == 0) { 706 msr = intr_disable(); 707 td->td_md.md_spinlock_count = 1; 708 td->td_md.md_saved_msr = msr; 709 } else 710 td->td_md.md_spinlock_count++; 711 critical_enter(); 712} 713 714void 715spinlock_exit(void) 716{ 717 struct thread *td; 718 register_t msr; 719 720 td = curthread; 721 critical_exit(); 722 msr = td->td_md.md_saved_msr; 723 td->td_md.md_spinlock_count--; 724 if (td->td_md.md_spinlock_count == 0) 725 intr_restore(msr); 726} 727 728/* 729 * kcopy(const void *src, void *dst, size_t len); 730 * 731 * Copy len bytes from src to dst, aborting if we encounter a fatal 732 * page fault. 733 * 734 * kcopy() _must_ save and restore the old fault handler since it is 735 * called by uiomove(), which may be in the path of servicing a non-fatal 736 * page fault. 737 */ 738int 739kcopy(const void *src, void *dst, size_t len) 740{ 741 struct thread *td; 742 faultbuf env, *oldfault; 743 int rv; 744 745 td = PCPU_GET(curthread); 746 oldfault = td->td_pcb->pcb_onfault; 747 if ((rv = setfault(env)) != 0) { 748 td->td_pcb->pcb_onfault = oldfault; 749 return rv; 750 } 751 752 memcpy(dst, src, len); 753 754 td->td_pcb->pcb_onfault = oldfault; 755 return (0); 756} 757 758int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */ 759 760int 761db_trap_glue(struct trapframe *frame) 762{ 763 if (!(frame->srr1 & PSL_PR) 764 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC 765 || (frame->exc == EXC_PGM 766 && (frame->srr1 & 0x20000)) 767 || frame->exc == EXC_BPT 768 || frame->exc == EXC_DSI)) { 769 int type = frame->exc; 770 if (type == EXC_PGM && (frame->srr1 & 0x20000)) { 771 type = T_BREAKPOINT; 772 } 773 return (kdb_trap(type, 0, frame)); 774 } 775 776 return (0); 777} 778 779#ifndef __powerpc64__ 780 781uint64_t 782va_to_vsid(pmap_t pm, vm_offset_t va) 783{ 784 return ((pm->pm_sr[(uintptr_t)va >> ADDR_SR_SHFT]) & SR_VSID_MASK); 785} 786 787#endif 788