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