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 #include "opt_ddb.h" 59 #include "opt_kstack_pages.h" 60 #include "opt_platform.h" 61 62 #include <sys/param.h> 63 #include <sys/proc.h> 64 #include <sys/systm.h> 65 #include <sys/bio.h> 66 #include <sys/buf.h> 67 #include <sys/bus.h> 68 #include <sys/cons.h> 69 #include <sys/cpu.h> 70 #include <sys/eventhandler.h> 71 #include <sys/exec.h> 72 #include <sys/imgact.h> 73 #include <sys/kdb.h> 74 #include <sys/kernel.h> 75 #include <sys/ktr.h> 76 #include <sys/linker.h> 77 #include <sys/lock.h> 78 #include <sys/malloc.h> 79 #include <sys/mbuf.h> 80 #include <sys/msgbuf.h> 81 #include <sys/mutex.h> 82 #include <sys/ptrace.h> 83 #include <sys/reboot.h> 84 #include <sys/reg.h> 85 #include <sys/rwlock.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_phys.h> 103 #include <vm/vm_map.h> 104 #include <vm/vm_object.h> 105 #include <vm/vm_pager.h> 106 107 #include <machine/altivec.h> 108 #ifndef __powerpc64__ 109 #include <machine/bat.h> 110 #endif 111 #include <machine/cpu.h> 112 #include <machine/elf.h> 113 #include <machine/fpu.h> 114 #include <machine/hid.h> 115 #include <machine/ifunc.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/sigframe.h> 122 #include <machine/spr.h> 123 #include <machine/trap.h> 124 #include <machine/vmparam.h> 125 #include <machine/ofw_machdep.h> 126 127 #include <ddb/ddb.h> 128 129 #include <dev/ofw/openfirm.h> 130 #include <dev/ofw/ofw_subr.h> 131 132 int cold = 1; 133 #ifdef __powerpc64__ 134 int cacheline_size = 128; 135 #else 136 int cacheline_size = 32; 137 #endif 138 #ifdef __powerpc64__ 139 int hw_direct_map = -1; 140 #else 141 int hw_direct_map = 1; 142 #endif 143 144 #ifdef BOOKE 145 extern vm_paddr_t kernload; 146 #endif 147 148 extern void *ap_pcpu; 149 150 struct pcpu __pcpu[MAXCPU] __aligned(PAGE_SIZE); 151 static char init_kenv[2048]; 152 153 static struct trapframe frame0; 154 155 const char machine[] = "powerpc"; 156 SYSCTL_CONST_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD | CTLFLAG_CAPRD, 157 machine, "Machine class"); 158 159 static void cpu_startup(void *); 160 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 161 162 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, 163 CTLFLAG_RD, &cacheline_size, 0, ""); 164 165 uintptr_t powerpc_init(vm_offset_t, vm_offset_t, vm_offset_t, void *, 166 uint32_t); 167 168 static void fake_preload_metadata(void); 169 170 long Maxmem = 0; 171 long realmem = 0; 172 173 /* Default MSR values set in the AIM/Book-E early startup code */ 174 register_t psl_kernset; 175 register_t psl_userset; 176 register_t psl_userstatic; 177 #ifdef __powerpc64__ 178 register_t psl_userset32; 179 #endif 180 181 struct kva_md_info kmi; 182 183 static void 184 cpu_startup(void *dummy) 185 { 186 187 /* 188 * Initialise the decrementer-based clock. 189 */ 190 decr_init(); 191 192 /* 193 * Good {morning,afternoon,evening,night}. 194 */ 195 cpu_setup(PCPU_GET(cpuid)); 196 197 #ifdef PERFMON 198 perfmon_init(); 199 #endif 200 printf("real memory = %ju (%ju MB)\n", ptoa((uintmax_t)physmem), 201 ptoa((uintmax_t)physmem) / 1048576); 202 realmem = physmem; 203 204 if (bootverbose) 205 printf("available KVA = %zu (%zu MB)\n", 206 virtual_end - virtual_avail, 207 (virtual_end - virtual_avail) / 1048576); 208 209 /* 210 * Display any holes after the first chunk of extended memory. 211 */ 212 if (bootverbose) { 213 int indx; 214 215 printf("Physical memory chunk(s):\n"); 216 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 217 vm_paddr_t size1 = 218 phys_avail[indx + 1] - phys_avail[indx]; 219 220 #ifdef __powerpc64__ 221 printf("0x%016jx - 0x%016jx, %ju bytes (%ju pages)\n", 222 #else 223 printf("0x%09jx - 0x%09jx, %ju bytes (%ju pages)\n", 224 #endif 225 (uintmax_t)phys_avail[indx], 226 (uintmax_t)phys_avail[indx + 1] - 1, 227 (uintmax_t)size1, (uintmax_t)size1 / PAGE_SIZE); 228 } 229 } 230 231 vm_ksubmap_init(&kmi); 232 233 printf("avail memory = %ju (%ju MB)\n", 234 ptoa((uintmax_t)vm_free_count()), 235 ptoa((uintmax_t)vm_free_count()) / 1048576); 236 237 /* 238 * Set up buffers, so they can be used to read disk labels. 239 */ 240 bufinit(); 241 vm_pager_bufferinit(); 242 } 243 244 extern vm_offset_t __startkernel, __endkernel; 245 extern unsigned char __bss_start[]; 246 extern unsigned char __sbss_start[]; 247 extern unsigned char __sbss_end[]; 248 extern unsigned char _end[]; 249 250 void aim_early_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, 251 void *mdp, uint32_t mdp_cookie); 252 void aim_cpu_init(vm_offset_t toc); 253 void booke_cpu_init(void); 254 255 #ifdef DDB 256 static void load_external_symtab(void); 257 #endif 258 259 uintptr_t 260 powerpc_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp, 261 uint32_t mdp_cookie) 262 { 263 struct pcpu *pc; 264 struct cpuref bsp; 265 vm_offset_t startkernel, endkernel; 266 char *env; 267 void *kmdp = NULL; 268 bool ofw_bootargs = false; 269 #ifdef DDB 270 bool symbols_provided = false; 271 vm_offset_t ksym_start; 272 vm_offset_t ksym_end; 273 #endif 274 275 /* First guess at start/end kernel positions */ 276 startkernel = __startkernel; 277 endkernel = __endkernel; 278 279 /* 280 * If the metadata pointer cookie is not set to the magic value, 281 * the number in mdp should be treated as nonsense. 282 */ 283 if (mdp_cookie != 0xfb5d104d) 284 mdp = NULL; 285 286 #if !defined(BOOKE) 287 /* 288 * On BOOKE the BSS is already cleared and some variables 289 * initialized. Do not wipe them out. 290 */ 291 bzero(__sbss_start, __sbss_end - __sbss_start); 292 bzero(__bss_start, _end - __bss_start); 293 #endif 294 295 cpu_feature_setup(); 296 297 #ifdef AIM 298 aim_early_init(fdt, toc, ofentry, mdp, mdp_cookie); 299 #endif 300 301 /* 302 * At this point, we are executing in our correct memory space. 303 * Book-E started there, and AIM has done an rfi and restarted 304 * execution from _start. 305 * 306 * We may still be in real mode, however. If we are running out of 307 * the direct map on 64 bit, this is possible to do. 308 */ 309 310 /* 311 * Parse metadata if present and fetch parameters. Must be done 312 * before console is inited so cninit gets the right value of 313 * boothowto. 314 */ 315 if (mdp != NULL) { 316 /* 317 * Starting up from loader. 318 * 319 * Full metadata has been provided, but we need to figure 320 * out the correct address to relocate it to. 321 */ 322 char *envp = NULL; 323 uintptr_t md_offset = 0; 324 vm_paddr_t kernelendphys; 325 326 #ifdef AIM 327 if ((uintptr_t)&powerpc_init > DMAP_BASE_ADDRESS) 328 md_offset = DMAP_BASE_ADDRESS; 329 #else /* BOOKE */ 330 md_offset = VM_MIN_KERNEL_ADDRESS - kernload; 331 #endif 332 333 preload_metadata = mdp; 334 if (md_offset > 0) { 335 /* Translate phys offset into DMAP offset. */ 336 preload_metadata += md_offset; 337 preload_bootstrap_relocate(md_offset); 338 } 339 kmdp = preload_search_by_type("elf kernel"); 340 if (kmdp != NULL) { 341 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 342 envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 343 if (envp != NULL) 344 envp += md_offset; 345 init_static_kenv(envp, 0); 346 if (fdt == 0) { 347 fdt = MD_FETCH(kmdp, MODINFOMD_DTBP, uintptr_t); 348 if (fdt != 0) 349 fdt += md_offset; 350 } 351 /* kernelstartphys is already relocated. */ 352 kernelendphys = MD_FETCH(kmdp, MODINFOMD_KERNEND, 353 vm_offset_t); 354 if (kernelendphys != 0) 355 kernelendphys += md_offset; 356 endkernel = ulmax(endkernel, kernelendphys); 357 #ifdef DDB 358 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 359 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 360 361 db_fetch_ksymtab(ksym_start, ksym_end, md_offset); 362 /* Symbols provided by loader. */ 363 symbols_provided = true; 364 #endif 365 } 366 } else { 367 /* 368 * Self-loading kernel, we have to fake up metadata. 369 * 370 * Since we are creating the metadata from the final 371 * memory space, we don't need to call 372 * preload_boostrap_relocate(). 373 */ 374 fake_preload_metadata(); 375 kmdp = preload_search_by_type("elf kernel"); 376 init_static_kenv(init_kenv, sizeof(init_kenv)); 377 ofw_bootargs = true; 378 } 379 380 /* Store boot environment state */ 381 OF_initial_setup((void *)fdt, NULL, (int (*)(void *))ofentry); 382 383 /* 384 * Init params/tunables that can be overridden by the loader 385 */ 386 init_param1(); 387 388 /* 389 * Start initializing proc0 and thread0. 390 */ 391 proc_linkup0(&proc0, &thread0); 392 thread0.td_frame = &frame0; 393 #ifdef __powerpc64__ 394 __asm __volatile("mr 13,%0" :: "r"(&thread0)); 395 #else 396 __asm __volatile("mr 2,%0" :: "r"(&thread0)); 397 #endif 398 399 /* 400 * Init mutexes, which we use heavily in PMAP 401 */ 402 mutex_init(); 403 404 /* 405 * Install the OF client interface 406 */ 407 OF_bootstrap(); 408 409 #ifdef DDB 410 if (!symbols_provided && hw_direct_map) 411 load_external_symtab(); 412 #endif 413 414 if (ofw_bootargs) 415 ofw_parse_bootargs(); 416 417 #ifdef AIM 418 /* 419 * Early I/O map needs to be initialized before console, in order to 420 * map frame buffers properly, and after boot args have been parsed, 421 * to handle tunables properly. 422 */ 423 pmap_early_io_map_init(); 424 #endif 425 426 /* 427 * Initialize the console before printing anything. 428 */ 429 cninit(); 430 431 #ifdef AIM 432 aim_cpu_init(toc); 433 #else /* BOOKE */ 434 booke_cpu_init(); 435 436 /* Make sure the kernel icache is valid before we go too much further */ 437 __syncicache((caddr_t)startkernel, endkernel - startkernel); 438 #endif 439 440 /* 441 * Choose a platform module so we can get the physical memory map. 442 */ 443 444 platform_probe_and_attach(); 445 446 /* 447 * Set up per-cpu data for the BSP now that the platform can tell 448 * us which that is. 449 */ 450 if (platform_smp_get_bsp(&bsp) != 0) 451 bsp.cr_cpuid = 0; 452 pc = &__pcpu[bsp.cr_cpuid]; 453 __asm __volatile("mtsprg 0, %0" :: "r"(pc)); 454 pcpu_init(pc, bsp.cr_cpuid, sizeof(struct pcpu)); 455 pc->pc_curthread = &thread0; 456 thread0.td_oncpu = bsp.cr_cpuid; 457 pc->pc_cpuid = bsp.cr_cpuid; 458 pc->pc_hwref = bsp.cr_hwref; 459 460 /* 461 * Init KDB 462 */ 463 kdb_init(); 464 465 /* 466 * Bring up MMU 467 */ 468 pmap_mmu_init(); 469 link_elf_ireloc(kmdp); 470 pmap_bootstrap(startkernel, endkernel); 471 mtmsr(psl_kernset & ~PSL_EE); 472 473 /* 474 * Initialize params/tunables that are derived from memsize 475 */ 476 init_param2(physmem); 477 478 /* 479 * Grab booted kernel's name 480 */ 481 env = kern_getenv("kernelname"); 482 if (env != NULL) { 483 strlcpy(kernelname, env, sizeof(kernelname)); 484 freeenv(env); 485 } 486 487 /* 488 * Finish setting up thread0. 489 */ 490 thread0.td_pcb = (struct pcb *) 491 ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE - 492 sizeof(struct pcb)) & ~15UL); 493 bzero((void *)thread0.td_pcb, sizeof(struct pcb)); 494 pc->pc_curpcb = thread0.td_pcb; 495 496 /* Initialise the message buffer. */ 497 msgbufinit(msgbufp, msgbufsize); 498 499 #ifdef KDB 500 if (boothowto & RB_KDB) 501 kdb_enter(KDB_WHY_BOOTFLAGS, 502 "Boot flags requested debugger"); 503 #endif 504 505 return (((uintptr_t)thread0.td_pcb - 506 (sizeof(struct callframe) - 3*sizeof(register_t))) & ~15UL); 507 } 508 509 #ifdef DDB 510 /* 511 * On powernv and some booke systems, we might not have symbols loaded via 512 * loader. However, if the user passed the kernel in as the initrd as well, 513 * we can manually load it via reinterpreting the initrd copy of the kernel. 514 * 515 * In the BOOKE case, we don't actually have a DMAP yet, so we have to use 516 * temporary maps to inspect the memory, but write DMAP addresses to the 517 * configuration variables. 518 */ 519 static void 520 load_external_symtab(void) { 521 phandle_t chosen; 522 vm_paddr_t start, end; 523 pcell_t cell[2]; 524 ssize_t size; 525 u_char *kernelimg; /* Temporary map */ 526 u_char *kernelimg_final; /* Final location */ 527 528 int i; 529 530 Elf_Ehdr *ehdr; 531 Elf_Shdr *shdr; 532 533 vm_offset_t ksym_start, ksym_sz, kstr_start, kstr_sz, 534 ksym_start_final, kstr_start_final; 535 536 if (!hw_direct_map) 537 return; 538 539 chosen = OF_finddevice("/chosen"); 540 if (chosen <= 0) 541 return; 542 543 if (!OF_hasprop(chosen, "linux,initrd-start") || 544 !OF_hasprop(chosen, "linux,initrd-end")) 545 return; 546 547 size = OF_getencprop(chosen, "linux,initrd-start", cell, sizeof(cell)); 548 if (size == 4) 549 start = cell[0]; 550 else if (size == 8) 551 start = (uint64_t)cell[0] << 32 | cell[1]; 552 else 553 return; 554 555 size = OF_getencprop(chosen, "linux,initrd-end", cell, sizeof(cell)); 556 if (size == 4) 557 end = cell[0]; 558 else if (size == 8) 559 end = (uint64_t)cell[0] << 32 | cell[1]; 560 else 561 return; 562 563 if (!(end - start > 0)) 564 return; 565 566 kernelimg_final = (u_char *) PHYS_TO_DMAP(start); 567 #ifdef AIM 568 kernelimg = kernelimg_final; 569 #else /* BOOKE */ 570 kernelimg = (u_char *)pmap_early_io_map(start, PAGE_SIZE); 571 #endif 572 ehdr = (Elf_Ehdr *)kernelimg; 573 574 if (!IS_ELF(*ehdr)) { 575 #ifdef BOOKE 576 pmap_early_io_unmap(start, PAGE_SIZE); 577 #endif 578 return; 579 } 580 581 #ifdef BOOKE 582 pmap_early_io_unmap(start, PAGE_SIZE); 583 kernelimg = (u_char *)pmap_early_io_map(start, (end - start)); 584 #endif 585 586 shdr = (Elf_Shdr *)(kernelimg + ehdr->e_shoff); 587 588 ksym_start = 0; 589 ksym_sz = 0; 590 ksym_start_final = 0; 591 kstr_start = 0; 592 kstr_sz = 0; 593 kstr_start_final = 0; 594 for (i = 0; i < ehdr->e_shnum; i++) { 595 if (shdr[i].sh_type == SHT_SYMTAB) { 596 ksym_start = (vm_offset_t)(kernelimg + 597 shdr[i].sh_offset); 598 ksym_start_final = (vm_offset_t) 599 (kernelimg_final + shdr[i].sh_offset); 600 ksym_sz = (vm_offset_t)(shdr[i].sh_size); 601 kstr_start = (vm_offset_t)(kernelimg + 602 shdr[shdr[i].sh_link].sh_offset); 603 kstr_start_final = (vm_offset_t) 604 (kernelimg_final + 605 shdr[shdr[i].sh_link].sh_offset); 606 607 kstr_sz = (vm_offset_t) 608 (shdr[shdr[i].sh_link].sh_size); 609 } 610 } 611 612 if (ksym_start != 0 && kstr_start != 0 && ksym_sz != 0 && 613 kstr_sz != 0 && ksym_start < kstr_start) { 614 /* 615 * We can't use db_fetch_ksymtab() here, because we need to 616 * feed in DMAP addresses that are not mapped yet on booke. 617 * 618 * Write the variables directly, where db_init() will pick 619 * them up later, after the DMAP is up. 620 */ 621 ksymtab = ksym_start_final; 622 ksymtab_size = ksym_sz; 623 kstrtab = kstr_start_final; 624 ksymtab_relbase = (__startkernel - KERNBASE); 625 } 626 627 #ifdef BOOKE 628 pmap_early_io_unmap(start, (end - start)); 629 #endif 630 631 }; 632 #endif 633 634 /* 635 * When not being loaded from loader, we need to create our own metadata 636 * so we can interact with the kernel linker. 637 */ 638 static void 639 fake_preload_metadata(void) { 640 /* We depend on dword alignment here. */ 641 static uint32_t fake_preload[36] __aligned(8); 642 int i = 0; 643 644 fake_preload[i++] = MODINFO_NAME; 645 fake_preload[i++] = strlen("kernel") + 1; 646 strcpy((char*)&fake_preload[i], "kernel"); 647 /* ['k' 'e' 'r' 'n'] ['e' 'l' '\0' ..] */ 648 i += 2; 649 650 fake_preload[i++] = MODINFO_TYPE; 651 fake_preload[i++] = strlen("elf kernel") + 1; 652 strcpy((char*)&fake_preload[i], "elf kernel"); 653 /* ['e' 'l' 'f' ' '] ['k' 'e' 'r' 'n'] ['e' 'l' '\0' ..] */ 654 i += 3; 655 656 #ifdef __powerpc64__ 657 /* Padding -- Fields start on u_long boundaries */ 658 fake_preload[i++] = 0; 659 #endif 660 661 fake_preload[i++] = MODINFO_ADDR; 662 fake_preload[i++] = sizeof(vm_offset_t); 663 *(vm_offset_t *)&fake_preload[i] = 664 (vm_offset_t)(__startkernel); 665 i += (sizeof(vm_offset_t) / 4); 666 667 fake_preload[i++] = MODINFO_SIZE; 668 fake_preload[i++] = sizeof(vm_offset_t); 669 *(vm_offset_t *)&fake_preload[i] = 670 (vm_offset_t)(__endkernel) - (vm_offset_t)(__startkernel); 671 i += (sizeof(vm_offset_t) / 4); 672 673 /* 674 * MODINFOMD_SSYM and MODINFOMD_ESYM cannot be provided here, 675 * as the memory comes from outside the loaded ELF sections. 676 * 677 * If the symbols are being provided by other means (MFS), the 678 * tables will be loaded into the debugger directly. 679 */ 680 681 /* Null field at end to mark end of data. */ 682 fake_preload[i++] = 0; 683 fake_preload[i] = 0; 684 preload_metadata = (void*)fake_preload; 685 } 686 687 /* 688 * Flush the D-cache for non-DMA I/O so that the I-cache can 689 * be made coherent later. 690 */ 691 void 692 cpu_flush_dcache(void *ptr, size_t len) 693 { 694 register_t addr, off; 695 696 /* 697 * Align the address to a cacheline and adjust the length 698 * accordingly. Then round the length to a multiple of the 699 * cacheline for easy looping. 700 */ 701 addr = (uintptr_t)ptr; 702 off = addr & (cacheline_size - 1); 703 addr -= off; 704 len = roundup2(len + off, cacheline_size); 705 706 while (len > 0) { 707 __asm __volatile ("dcbf 0,%0" :: "r"(addr)); 708 __asm __volatile ("sync"); 709 addr += cacheline_size; 710 len -= cacheline_size; 711 } 712 } 713 714 int 715 ptrace_set_pc(struct thread *td, unsigned long addr) 716 { 717 struct trapframe *tf; 718 719 tf = td->td_frame; 720 tf->srr0 = (register_t)addr; 721 722 return (0); 723 } 724 725 void 726 spinlock_enter(void) 727 { 728 struct thread *td; 729 register_t msr; 730 731 td = curthread; 732 if (td->td_md.md_spinlock_count == 0) { 733 nop_prio_mhigh(); 734 msr = intr_disable(); 735 td->td_md.md_spinlock_count = 1; 736 td->td_md.md_saved_msr = msr; 737 critical_enter(); 738 } else 739 td->td_md.md_spinlock_count++; 740 } 741 742 void 743 spinlock_exit(void) 744 { 745 struct thread *td; 746 register_t msr; 747 748 td = curthread; 749 msr = td->td_md.md_saved_msr; 750 td->td_md.md_spinlock_count--; 751 if (td->td_md.md_spinlock_count == 0) { 752 critical_exit(); 753 intr_restore(msr); 754 nop_prio_medium(); 755 } 756 } 757 758 /* 759 * Simple ddb(4) command/hack to view any SPR on the running CPU. 760 * Uses a trivial asm function to perform the mfspr, and rewrites the mfspr 761 * instruction each time. 762 * XXX: Since it uses code modification, it won't work if the kernel code pages 763 * are marked RO. 764 */ 765 extern register_t get_spr(int); 766 767 #ifdef DDB 768 DB_SHOW_COMMAND(spr, db_show_spr) 769 { 770 register_t spr; 771 volatile uint32_t *p; 772 int sprno, saved_sprno; 773 774 if (!have_addr) 775 return; 776 777 saved_sprno = sprno = (intptr_t) addr; 778 sprno = ((sprno & 0x3e0) >> 5) | ((sprno & 0x1f) << 5); 779 p = (uint32_t *)(void *)&get_spr; 780 #ifdef __powerpc64__ 781 #if defined(_CALL_ELF) && _CALL_ELF == 2 782 /* Account for ELFv2 function prologue. */ 783 p += 2; 784 #else 785 p = *(volatile uint32_t * volatile *)p; 786 #endif 787 #endif 788 *p = (*p & ~0x001ff800) | (sprno << 11); 789 __syncicache(__DEVOLATILE(uint32_t *, p), cacheline_size); 790 spr = get_spr(sprno); 791 792 db_printf("SPR %d(%x): %lx\n", saved_sprno, saved_sprno, 793 (unsigned long)spr); 794 } 795 796 DB_SHOW_COMMAND(frame, db_show_frame) 797 { 798 struct trapframe *tf; 799 long reg; 800 int i; 801 802 tf = have_addr ? (struct trapframe *)addr : curthread->td_frame; 803 804 /* 805 * Everything casts through long to simplify the printing. 806 * 'long' is native register size anyway. 807 */ 808 db_printf("trap frame %p\n", tf); 809 for (i = 0; i < nitems(tf->fixreg); i++) { 810 reg = tf->fixreg[i]; 811 db_printf(" r%d:\t%#lx (%ld)\n", i, reg, reg); 812 } 813 reg = tf->lr; 814 db_printf(" lr:\t%#lx\n", reg); 815 reg = tf->cr; 816 db_printf(" cr:\t%#lx\n", reg); 817 reg = tf->xer; 818 db_printf(" xer:\t%#lx\n", reg); 819 reg = tf->ctr; 820 db_printf(" ctr:\t%#lx (%ld)\n", reg, reg); 821 reg = tf->srr0; 822 db_printf(" srr0:\t%#lx\n", reg); 823 reg = tf->srr1; 824 db_printf(" srr1:\t%#lx\n", reg); 825 reg = tf->exc; 826 db_printf(" exc:\t%#lx\n", reg); 827 reg = tf->dar; 828 db_printf(" dar:\t%#lx\n", reg); 829 #ifdef AIM 830 reg = tf->cpu.aim.dsisr; 831 db_printf(" dsisr:\t%#lx\n", reg); 832 #else 833 reg = tf->cpu.booke.esr; 834 db_printf(" esr:\t%#lx\n", reg); 835 reg = tf->cpu.booke.dbcr0; 836 db_printf(" dbcr0:\t%#lx\n", reg); 837 #endif 838 } 839 #endif 840 841 /* __stack_chk_fail_local() is called in secure-plt (32-bit). */ 842 #if !defined(__powerpc64__) 843 extern void __stack_chk_fail(void); 844 void __stack_chk_fail_local(void); 845 846 void 847 __stack_chk_fail_local(void) 848 { 849 850 __stack_chk_fail(); 851 } 852 #endif 853