machdep.c revision 259235
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: stable/10/sys/powerpc/aim/machdep.c 259235 2013-12-11 22:36:20Z andreast $"); 59 60#include "opt_compat.h" 61#include "opt_ddb.h" 62#include "opt_kstack_pages.h" 63#include "opt_platform.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/rwlock.h> 88#include <sys/signalvar.h> 89#include <sys/syscallsubr.h> 90#include <sys/sysctl.h> 91#include <sys/sysent.h> 92#include <sys/sysproto.h> 93#include <sys/ucontext.h> 94#include <sys/uio.h> 95#include <sys/vmmeter.h> 96#include <sys/vnode.h> 97 98#include <net/netisr.h> 99 100#include <vm/vm.h> 101#include <vm/vm_extern.h> 102#include <vm/vm_kern.h> 103#include <vm/vm_page.h> 104#include <vm/vm_map.h> 105#include <vm/vm_object.h> 106#include <vm/vm_pager.h> 107 108#include <machine/altivec.h> 109#ifndef __powerpc64__ 110#include <machine/bat.h> 111#endif 112#include <machine/cpu.h> 113#include <machine/elf.h> 114#include <machine/fpu.h> 115#include <machine/hid.h> 116#include <machine/kdb.h> 117#include <machine/md_var.h> 118#include <machine/metadata.h> 119#include <machine/mmuvar.h> 120#include <machine/pcb.h> 121#include <machine/reg.h> 122#include <machine/sigframe.h> 123#include <machine/spr.h> 124#include <machine/trap.h> 125#include <machine/vmparam.h> 126#include <machine/ofw_machdep.h> 127 128#include <ddb/ddb.h> 129 130#include <dev/ofw/openfirm.h> 131 132#ifdef DDB 133extern vm_offset_t ksym_start, ksym_end; 134#endif 135 136int cold = 1; 137#ifdef __powerpc64__ 138extern int n_slbs; 139int cacheline_size = 128; 140#else 141int cacheline_size = 32; 142#endif 143int hw_direct_map = 1; 144 145struct pcpu __pcpu[MAXCPU]; 146 147static struct trapframe frame0; 148 149char machine[] = "powerpc"; 150SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 151 152static void cpu_startup(void *); 153SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 154 155SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 156 CTLFLAG_RD, &cacheline_size, 0, ""); 157 158uintptr_t powerpc_init(vm_offset_t, vm_offset_t, vm_offset_t, void *); 159 160int setfault(faultbuf); /* defined in locore.S */ 161 162long Maxmem = 0; 163long realmem = 0; 164 165#ifndef __powerpc64__ 166struct bat battable[16]; 167#endif 168 169struct kva_md_info kmi; 170 171static void 172cpu_startup(void *dummy) 173{ 174 175 /* 176 * Initialise the decrementer-based clock. 177 */ 178 decr_init(); 179 180 /* 181 * Good {morning,afternoon,evening,night}. 182 */ 183 cpu_setup(PCPU_GET(cpuid)); 184 185#ifdef PERFMON 186 perfmon_init(); 187#endif 188 printf("real memory = %ld (%ld MB)\n", ptoa(physmem), 189 ptoa(physmem) / 1048576); 190 realmem = physmem; 191 192 if (bootverbose) 193 printf("available KVA = %zd (%zd MB)\n", 194 virtual_end - virtual_avail, 195 (virtual_end - virtual_avail) / 1048576); 196 197 /* 198 * Display any holes after the first chunk of extended memory. 199 */ 200 if (bootverbose) { 201 int indx; 202 203 printf("Physical memory chunk(s):\n"); 204 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 205 vm_offset_t size1 = 206 phys_avail[indx + 1] - phys_avail[indx]; 207 208 #ifdef __powerpc64__ 209 printf("0x%016lx - 0x%016lx, %ld bytes (%ld pages)\n", 210 #else 211 printf("0x%08x - 0x%08x, %d bytes (%ld pages)\n", 212 #endif 213 phys_avail[indx], phys_avail[indx + 1] - 1, size1, 214 size1 / PAGE_SIZE); 215 } 216 } 217 218 vm_ksubmap_init(&kmi); 219 220 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), 221 ptoa(cnt.v_free_count) / 1048576); 222 223 /* 224 * Set up buffers, so they can be used to read disk labels. 225 */ 226 bufinit(); 227 vm_pager_bufferinit(); 228} 229 230extern char kernel_text[], _end[]; 231 232#ifndef __powerpc64__ 233/* Bits for running on 64-bit systems in 32-bit mode. */ 234extern void *testppc64, *testppc64size; 235extern void *restorebridge, *restorebridgesize; 236extern void *rfid_patch, *rfi_patch1, *rfi_patch2; 237extern void *trapcode64; 238#endif 239 240#ifdef SMP 241extern void *rstcode, *rstsize; 242#endif 243extern void *trapcode, *trapsize; 244extern void *slbtrap, *slbtrapsize; 245extern void *alitrap, *alisize; 246extern void *dsitrap, *dsisize; 247extern void *decrint, *decrsize; 248extern void *extint, *extsize; 249extern void *dblow, *dbsize; 250extern void *imisstrap, *imisssize; 251extern void *dlmisstrap, *dlmisssize; 252extern void *dsmisstrap, *dsmisssize; 253char save_trap_init[0x2f00]; /* EXC_LAST */ 254 255uintptr_t 256powerpc_init(vm_offset_t startkernel, vm_offset_t endkernel, 257 vm_offset_t basekernel, void *mdp) 258{ 259 struct pcpu *pc; 260 void *generictrap; 261 size_t trap_offset; 262 void *kmdp; 263 char *env; 264 register_t msr, scratch; 265#ifdef WII 266 register_t vers; 267#endif 268 uint8_t *cache_check; 269 int cacheline_warn; 270 #ifndef __powerpc64__ 271 int ppc64; 272 #endif 273 274 kmdp = NULL; 275 trap_offset = 0; 276 cacheline_warn = 0; 277 278 /* Save trap vectors. */ 279 ofw_save_trap_vec(save_trap_init); 280 281#ifdef WII 282 /* 283 * The Wii loader doesn't pass us any environment so, mdp 284 * points to garbage at this point. The Wii CPU is a 750CL. 285 */ 286 vers = mfpvr(); 287 if ((vers & 0xfffff0e0) == (MPC750 << 16 | MPC750CL)) 288 mdp = NULL; 289#endif 290 291 /* 292 * Parse metadata if present and fetch parameters. Must be done 293 * before console is inited so cninit gets the right value of 294 * boothowto. 295 */ 296 if (mdp != NULL) { 297 preload_metadata = mdp; 298 kmdp = preload_search_by_type("elf kernel"); 299 if (kmdp != NULL) { 300 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 301 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 302 endkernel = ulmax(endkernel, MD_FETCH(kmdp, 303 MODINFOMD_KERNEND, vm_offset_t)); 304#ifdef DDB 305 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 306 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 307#endif 308 } 309 } 310 311 /* 312 * Init params/tunables that can be overridden by the loader 313 */ 314 init_param1(); 315 316 /* 317 * Start initializing proc0 and thread0. 318 */ 319 proc_linkup0(&proc0, &thread0); 320 thread0.td_frame = &frame0; 321 322 /* 323 * Set up per-cpu data. 324 */ 325 pc = __pcpu; 326 pcpu_init(pc, 0, sizeof(struct pcpu)); 327 pc->pc_curthread = &thread0; 328#ifdef __powerpc64__ 329 __asm __volatile("mr 13,%0" :: "r"(pc->pc_curthread)); 330#else 331 __asm __volatile("mr 2,%0" :: "r"(pc->pc_curthread)); 332#endif 333 pc->pc_cpuid = 0; 334 335 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 336 337 /* 338 * Init mutexes, which we use heavily in PMAP 339 */ 340 341 mutex_init(); 342 343 /* 344 * Install the OF client interface 345 */ 346 347 OF_bootstrap(); 348 349 /* 350 * Initialize the console before printing anything. 351 */ 352 cninit(); 353 354 /* 355 * Complain if there is no metadata. 356 */ 357 if (mdp == NULL || kmdp == NULL) { 358 printf("powerpc_init: no loader metadata.\n"); 359 } 360 361 /* 362 * Init KDB 363 */ 364 365 kdb_init(); 366 367 /* Various very early CPU fix ups */ 368 switch (mfpvr() >> 16) { 369 /* 370 * PowerPC 970 CPUs have a misfeature requested by Apple that 371 * makes them pretend they have a 32-byte cacheline. Turn this 372 * off before we measure the cacheline size. 373 */ 374 case IBM970: 375 case IBM970FX: 376 case IBM970MP: 377 case IBM970GX: 378 scratch = mfspr(SPR_HID5); 379 scratch &= ~HID5_970_DCBZ_SIZE_HI; 380 mtspr(SPR_HID5, scratch); 381 break; 382 #ifdef __powerpc64__ 383 case IBMPOWER7: 384 /* XXX: get from ibm,slb-size in device tree */ 385 n_slbs = 32; 386 break; 387 #endif 388 } 389 390 /* 391 * Initialize the interrupt tables and figure out our cache line 392 * size and whether or not we need the 64-bit bridge code. 393 */ 394 395 /* 396 * Disable translation in case the vector area hasn't been 397 * mapped (G5). Note that no OFW calls can be made until 398 * translation is re-enabled. 399 */ 400 401 msr = mfmsr(); 402 mtmsr((msr & ~(PSL_IR | PSL_DR)) | PSL_RI); 403 404 /* 405 * Measure the cacheline size using dcbz 406 * 407 * Use EXC_PGM as a playground. We are about to overwrite it 408 * anyway, we know it exists, and we know it is cache-aligned. 409 */ 410 411 cache_check = (void *)EXC_PGM; 412 413 for (cacheline_size = 0; cacheline_size < 0x100; cacheline_size++) 414 cache_check[cacheline_size] = 0xff; 415 416 __asm __volatile("dcbz 0,%0":: "r" (cache_check) : "memory"); 417 418 /* Find the first byte dcbz did not zero to get the cache line size */ 419 for (cacheline_size = 0; cacheline_size < 0x100 && 420 cache_check[cacheline_size] == 0; cacheline_size++); 421 422 /* Work around psim bug */ 423 if (cacheline_size == 0) { 424 cacheline_warn = 1; 425 cacheline_size = 32; 426 } 427 428 /* Make sure the kernel icache is valid before we go too much further */ 429 __syncicache((caddr_t)startkernel, endkernel - startkernel); 430 431 #ifndef __powerpc64__ 432 /* 433 * Figure out whether we need to use the 64 bit PMAP. This works by 434 * executing an instruction that is only legal on 64-bit PPC (mtmsrd), 435 * and setting ppc64 = 0 if that causes a trap. 436 */ 437 438 ppc64 = 1; 439 440 bcopy(&testppc64, (void *)EXC_PGM, (size_t)&testppc64size); 441 __syncicache((void *)EXC_PGM, (size_t)&testppc64size); 442 443 __asm __volatile("\ 444 mfmsr %0; \ 445 mtsprg2 %1; \ 446 \ 447 mtmsrd %0; \ 448 mfsprg2 %1;" 449 : "=r"(scratch), "=r"(ppc64)); 450 451 if (ppc64) 452 cpu_features |= PPC_FEATURE_64; 453 454 /* 455 * Now copy restorebridge into all the handlers, if necessary, 456 * and set up the trap tables. 457 */ 458 459 if (cpu_features & PPC_FEATURE_64) { 460 /* Patch the two instances of rfi -> rfid */ 461 bcopy(&rfid_patch,&rfi_patch1,4); 462 #ifdef KDB 463 /* rfi_patch2 is at the end of dbleave */ 464 bcopy(&rfid_patch,&rfi_patch2,4); 465 #endif 466 467 /* 468 * Copy a code snippet to restore 32-bit bridge mode 469 * to the top of every non-generic trap handler 470 */ 471 472 trap_offset += (size_t)&restorebridgesize; 473 bcopy(&restorebridge, (void *)EXC_RST, trap_offset); 474 bcopy(&restorebridge, (void *)EXC_DSI, trap_offset); 475 bcopy(&restorebridge, (void *)EXC_ALI, trap_offset); 476 bcopy(&restorebridge, (void *)EXC_PGM, trap_offset); 477 bcopy(&restorebridge, (void *)EXC_MCHK, trap_offset); 478 bcopy(&restorebridge, (void *)EXC_TRC, trap_offset); 479 bcopy(&restorebridge, (void *)EXC_BPT, trap_offset); 480 481 /* 482 * Set the common trap entry point to the one that 483 * knows to restore 32-bit operation on execution. 484 */ 485 486 generictrap = &trapcode64; 487 } else { 488 generictrap = &trapcode; 489 } 490 491 #else /* powerpc64 */ 492 cpu_features |= PPC_FEATURE_64; 493 generictrap = &trapcode; 494 #endif 495 496#ifdef SMP 497 bcopy(&rstcode, (void *)(EXC_RST + trap_offset), (size_t)&rstsize); 498#else 499 bcopy(generictrap, (void *)EXC_RST, (size_t)&trapsize); 500#endif 501 502#ifdef KDB 503 bcopy(&dblow, (void *)(EXC_MCHK + trap_offset), (size_t)&dbsize); 504 bcopy(&dblow, (void *)(EXC_PGM + trap_offset), (size_t)&dbsize); 505 bcopy(&dblow, (void *)(EXC_TRC + trap_offset), (size_t)&dbsize); 506 bcopy(&dblow, (void *)(EXC_BPT + trap_offset), (size_t)&dbsize); 507#else 508 bcopy(generictrap, (void *)EXC_MCHK, (size_t)&trapsize); 509 bcopy(generictrap, (void *)EXC_PGM, (size_t)&trapsize); 510 bcopy(generictrap, (void *)EXC_TRC, (size_t)&trapsize); 511 bcopy(generictrap, (void *)EXC_BPT, (size_t)&trapsize); 512#endif 513 bcopy(&alitrap, (void *)(EXC_ALI + trap_offset), (size_t)&alisize); 514 bcopy(&dsitrap, (void *)(EXC_DSI + trap_offset), (size_t)&dsisize); 515 bcopy(generictrap, (void *)EXC_ISI, (size_t)&trapsize); 516 #ifdef __powerpc64__ 517 bcopy(&slbtrap, (void *)EXC_DSE, (size_t)&slbtrapsize); 518 bcopy(&slbtrap, (void *)EXC_ISE, (size_t)&slbtrapsize); 519 #endif 520 bcopy(generictrap, (void *)EXC_EXI, (size_t)&trapsize); 521 bcopy(generictrap, (void *)EXC_FPU, (size_t)&trapsize); 522 bcopy(generictrap, (void *)EXC_DECR, (size_t)&trapsize); 523 bcopy(generictrap, (void *)EXC_SC, (size_t)&trapsize); 524 bcopy(generictrap, (void *)EXC_FPA, (size_t)&trapsize); 525 bcopy(generictrap, (void *)EXC_VEC, (size_t)&trapsize); 526 bcopy(generictrap, (void *)EXC_PERF, (size_t)&trapsize); 527 bcopy(generictrap, (void *)EXC_VECAST_G4, (size_t)&trapsize); 528 bcopy(generictrap, (void *)EXC_VECAST_G5, (size_t)&trapsize); 529 #ifndef __powerpc64__ 530 /* G2-specific TLB miss helper handlers */ 531 bcopy(&imisstrap, (void *)EXC_IMISS, (size_t)&imisssize); 532 bcopy(&dlmisstrap, (void *)EXC_DLMISS, (size_t)&dlmisssize); 533 bcopy(&dsmisstrap, (void *)EXC_DSMISS, (size_t)&dsmisssize); 534 #endif 535 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); 536 537 /* 538 * Restore MSR 539 */ 540 mtmsr(msr); 541 542 /* Warn if cachline size was not determined */ 543 if (cacheline_warn == 1) { 544 printf("WARNING: cacheline size undetermined, setting to 32\n"); 545 } 546 547 /* 548 * Choose a platform module so we can get the physical memory map. 549 */ 550 551 platform_probe_and_attach(); 552 553 /* 554 * Initialise virtual memory. Use BUS_PROBE_GENERIC priority 555 * in case the platform module had a better idea of what we 556 * should do. 557 */ 558 if (cpu_features & PPC_FEATURE_64) 559 pmap_mmu_install(MMU_TYPE_G5, BUS_PROBE_GENERIC); 560 else 561 pmap_mmu_install(MMU_TYPE_OEA, BUS_PROBE_GENERIC); 562 563 pmap_bootstrap(startkernel, endkernel); 564 mtmsr(PSL_KERNSET & ~PSL_EE); 565 566 /* 567 * Initialize params/tunables that are derived from memsize 568 */ 569 init_param2(physmem); 570 571 /* 572 * Grab booted kernel's name 573 */ 574 env = getenv("kernelname"); 575 if (env != NULL) { 576 strlcpy(kernelname, env, sizeof(kernelname)); 577 freeenv(env); 578 } 579 580 /* 581 * Finish setting up thread0. 582 */ 583 thread0.td_pcb = (struct pcb *) 584 ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE - 585 sizeof(struct pcb)) & ~15UL); 586 bzero((void *)thread0.td_pcb, sizeof(struct pcb)); 587 pc->pc_curpcb = thread0.td_pcb; 588 589 /* Initialise the message buffer. */ 590 msgbufinit(msgbufp, msgbufsize); 591 592#ifdef KDB 593 if (boothowto & RB_KDB) 594 kdb_enter(KDB_WHY_BOOTFLAGS, 595 "Boot flags requested debugger"); 596#endif 597 598 return (((uintptr_t)thread0.td_pcb - 599 (sizeof(struct callframe) - 3*sizeof(register_t))) & ~15UL); 600} 601 602void 603bzero(void *buf, size_t len) 604{ 605 caddr_t p; 606 607 p = buf; 608 609 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { 610 *p++ = 0; 611 len--; 612 } 613 614 while (len >= sizeof(u_long) * 8) { 615 *(u_long*) p = 0; 616 *((u_long*) p + 1) = 0; 617 *((u_long*) p + 2) = 0; 618 *((u_long*) p + 3) = 0; 619 len -= sizeof(u_long) * 8; 620 *((u_long*) p + 4) = 0; 621 *((u_long*) p + 5) = 0; 622 *((u_long*) p + 6) = 0; 623 *((u_long*) p + 7) = 0; 624 p += sizeof(u_long) * 8; 625 } 626 627 while (len >= sizeof(u_long)) { 628 *(u_long*) p = 0; 629 len -= sizeof(u_long); 630 p += sizeof(u_long); 631 } 632 633 while (len) { 634 *p++ = 0; 635 len--; 636 } 637} 638 639void 640cpu_boot(int howto) 641{ 642} 643 644/* 645 * Flush the D-cache for non-DMA I/O so that the I-cache can 646 * be made coherent later. 647 */ 648void 649cpu_flush_dcache(void *ptr, size_t len) 650{ 651 /* TBD */ 652} 653 654void 655cpu_initclocks(void) 656{ 657 658 decr_tc_init(); 659 cpu_initclocks_bsp(); 660} 661 662/* 663 * Shutdown the CPU as much as possible. 664 */ 665void 666cpu_halt(void) 667{ 668 669 OF_exit(); 670} 671 672int 673ptrace_set_pc(struct thread *td, unsigned long addr) 674{ 675 struct trapframe *tf; 676 677 tf = td->td_frame; 678 tf->srr0 = (register_t)addr; 679 680 return (0); 681} 682 683int 684ptrace_single_step(struct thread *td) 685{ 686 struct trapframe *tf; 687 688 tf = td->td_frame; 689 tf->srr1 |= PSL_SE; 690 691 return (0); 692} 693 694int 695ptrace_clear_single_step(struct thread *td) 696{ 697 struct trapframe *tf; 698 699 tf = td->td_frame; 700 tf->srr1 &= ~PSL_SE; 701 702 return (0); 703} 704 705void 706kdb_cpu_clear_singlestep(void) 707{ 708 709 kdb_frame->srr1 &= ~PSL_SE; 710} 711 712void 713kdb_cpu_set_singlestep(void) 714{ 715 716 kdb_frame->srr1 |= PSL_SE; 717} 718 719/* 720 * Initialise a struct pcpu. 721 */ 722void 723cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) 724{ 725#ifdef __powerpc64__ 726/* Copy the SLB contents from the current CPU */ 727memcpy(pcpu->pc_slb, PCPU_GET(slb), sizeof(pcpu->pc_slb)); 728#endif 729} 730 731void 732spinlock_enter(void) 733{ 734 struct thread *td; 735 register_t msr; 736 737 td = curthread; 738 if (td->td_md.md_spinlock_count == 0) { 739 msr = intr_disable(); 740 td->td_md.md_spinlock_count = 1; 741 td->td_md.md_saved_msr = msr; 742 } else 743 td->td_md.md_spinlock_count++; 744 critical_enter(); 745} 746 747void 748spinlock_exit(void) 749{ 750 struct thread *td; 751 register_t msr; 752 753 td = curthread; 754 critical_exit(); 755 msr = td->td_md.md_saved_msr; 756 td->td_md.md_spinlock_count--; 757 if (td->td_md.md_spinlock_count == 0) 758 intr_restore(msr); 759} 760 761int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */ 762 763int 764db_trap_glue(struct trapframe *frame) 765{ 766 if (!(frame->srr1 & PSL_PR) 767 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC 768 || (frame->exc == EXC_PGM 769 && (frame->srr1 & 0x20000)) 770 || frame->exc == EXC_BPT 771 || frame->exc == EXC_DSI)) { 772 int type = frame->exc; 773 if (type == EXC_PGM && (frame->srr1 & 0x20000)) { 774 type = T_BREAKPOINT; 775 } 776 return (kdb_trap(type, 0, frame)); 777 } 778 779 return (0); 780} 781 782#ifndef __powerpc64__ 783 784uint64_t 785va_to_vsid(pmap_t pm, vm_offset_t va) 786{ 787 return ((pm->pm_sr[(uintptr_t)va >> ADDR_SR_SHFT]) & SR_VSID_MASK); 788} 789 790#endif 791