1 /* $NetBSD: fdt_machdep.c,v 1.101 2023/03/05 22:04:54 mlelstv Exp $ */ 2 3 /*- 4 * Copyright (c) 2015-2017 Jared McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: fdt_machdep.c,v 1.101 2023/03/05 22:04:54 mlelstv Exp $"); 31 32 #include "opt_arm_debug.h" 33 #include "opt_bootconfig.h" 34 #include "opt_cpuoptions.h" 35 #include "opt_ddb.h" 36 #include "opt_efi.h" 37 #include "opt_machdep.h" 38 #include "opt_md.h" 39 #include "opt_multiprocessor.h" 40 41 #include "genfb.h" 42 #include "ukbd.h" 43 #include "wsdisplay.h" 44 45 #include <sys/param.h> 46 #include <sys/types.h> 47 48 #include <sys/atomic.h> 49 #include <sys/bootblock.h> 50 #include <sys/bus.h> 51 #include <sys/conf.h> 52 #include <sys/cpu.h> 53 #include <sys/device.h> 54 #include <sys/disk.h> 55 #include <sys/disklabel.h> 56 #include <sys/endian.h> 57 #include <sys/exec.h> 58 #include <sys/fcntl.h> 59 #include <sys/kauth.h> 60 #include <sys/kernel.h> 61 #include <sys/kmem.h> 62 #include <sys/ksyms.h> 63 #include <sys/md5.h> 64 #include <sys/msgbuf.h> 65 #include <sys/proc.h> 66 #include <sys/pserialize.h> 67 #include <sys/reboot.h> 68 #include <sys/rnd.h> 69 #include <sys/rndsource.h> 70 #include <sys/systm.h> 71 #include <sys/termios.h> 72 #include <sys/vnode.h> 73 #include <sys/uuid.h> 74 75 #include <net/if.h> 76 #include <net/if_dl.h> 77 78 #include <dev/cons.h> 79 #include <uvm/uvm_extern.h> 80 81 #include <machine/db_machdep.h> 82 #include <ddb/db_sym.h> 83 #include <ddb/db_extern.h> 84 85 #include <machine/bootconfig.h> 86 #include <arm/armreg.h> 87 88 #include <arm/cpufunc.h> 89 90 #include <evbarm/include/autoconf.h> 91 #include <evbarm/fdt/machdep.h> 92 #include <evbarm/fdt/platform.h> 93 94 #include <arm/fdt/arm_fdtvar.h> 95 #include <dev/fdt/fdt_private.h> 96 #include <dev/fdt/fdt_memory.h> 97 98 #ifdef EFI_RUNTIME 99 #include <arm/arm/efi_runtime.h> 100 #endif 101 102 #if NWSDISPLAY > 0 && NGENFB > 0 103 #include <arm/fdt/arm_simplefb.h> 104 #endif 105 106 #if NUKBD > 0 107 #include <dev/usb/ukbdvar.h> 108 #endif 109 #if NWSDISPLAY > 0 110 #include <dev/wscons/wsdisplayvar.h> 111 #endif 112 113 #ifdef MEMORY_DISK_DYNAMIC 114 #include <dev/md.h> 115 #endif 116 117 #ifndef FDT_MAX_BOOT_STRING 118 #define FDT_MAX_BOOT_STRING 1024 119 #endif 120 121 BootConfig bootconfig; 122 char bootargs[FDT_MAX_BOOT_STRING] = ""; 123 char *boot_args = NULL; 124 125 /* filled in before cleaning bss. keep in .data */ 126 u_long uboot_args[4] __attribute__((__section__(".data"))); 127 const uint8_t *fdt_addr_r __attribute__((__section__(".data"))); 128 129 static uint64_t initrd_start, initrd_end; 130 static uint64_t rndseed_start, rndseed_end; /* our on-disk seed */ 131 static uint64_t efirng_start, efirng_end; /* firmware's EFI RNG output */ 132 133 #include <libfdt.h> 134 #include <dev/fdt/fdtvar.h> 135 #define FDT_BUF_SIZE (512*1024) 136 static uint8_t fdt_data[FDT_BUF_SIZE]; 137 138 extern char KERNEL_BASE_phys[]; 139 #define KERNEL_BASE_PHYS ((paddr_t)KERNEL_BASE_phys) 140 141 static void fdt_update_stdout_path(void); 142 static void fdt_device_register(device_t, void *); 143 static void fdt_device_register_post_config(device_t, void *); 144 static void fdt_cpu_rootconf(void); 145 static void fdt_reset(void); 146 static void fdt_powerdown(void); 147 148 #if BYTE_ORDER == BIG_ENDIAN 149 static void fdt_update_fb_format(void); 150 #endif 151 152 static void 153 earlyconsputc(dev_t dev, int c) 154 { 155 uartputc(c); 156 } 157 158 static int 159 earlyconsgetc(dev_t dev) 160 { 161 return -1; 162 } 163 164 static struct consdev earlycons = { 165 .cn_putc = earlyconsputc, 166 .cn_getc = earlyconsgetc, 167 .cn_pollc = nullcnpollc, 168 }; 169 170 #ifdef VERBOSE_INIT_ARM 171 #define VPRINTF(...) printf(__VA_ARGS__) 172 #else 173 #define VPRINTF(...) __nothing 174 #endif 175 176 static void 177 fdt_add_dram_blocks(const struct fdt_memory *m, void *arg) 178 { 179 BootConfig *bc = arg; 180 181 VPRINTF(" %" PRIx64 " - %" PRIx64 "\n", m->start, m->end - 1); 182 bc->dram[bc->dramblocks].address = m->start; 183 bc->dram[bc->dramblocks].pages = 184 (m->end - m->start) / PAGE_SIZE; 185 bc->dramblocks++; 186 } 187 188 static int nfdt_physmem = 0; 189 static struct boot_physmem fdt_physmem[FDT_MEMORY_RANGES]; 190 191 static void 192 fdt_add_boot_physmem(const struct fdt_memory *m, void *arg) 193 { 194 const paddr_t saddr = round_page(m->start); 195 const paddr_t eaddr = trunc_page(m->end); 196 197 VPRINTF(" %" PRIx64 " - %" PRIx64, m->start, m->end - 1); 198 if (saddr >= eaddr) { 199 VPRINTF(" skipped\n"); 200 return; 201 } 202 VPRINTF("\n"); 203 204 struct boot_physmem *bp = &fdt_physmem[nfdt_physmem++]; 205 206 KASSERT(nfdt_physmem <= FDT_MEMORY_RANGES); 207 208 bp->bp_start = atop(saddr); 209 bp->bp_pages = atop(eaddr) - bp->bp_start; 210 bp->bp_freelist = VM_FREELIST_DEFAULT; 211 212 #ifdef PMAP_NEED_ALLOC_POOLPAGE 213 const uint64_t memory_size = *(uint64_t *)arg; 214 if (atop(memory_size) > bp->bp_pages) { 215 arm_poolpage_vmfreelist = VM_FREELIST_DIRECTMAP; 216 bp->bp_freelist = VM_FREELIST_DIRECTMAP; 217 } 218 #endif 219 } 220 221 222 static void 223 fdt_print_memory(const struct fdt_memory *m, void *arg) 224 { 225 226 VPRINTF("FDT /memory @ 0x%" PRIx64 " size 0x%" PRIx64 "\n", 227 m->start, m->end - m->start); 228 } 229 230 231 /* 232 * Define usable memory regions. 233 */ 234 static void 235 fdt_build_bootconfig(uint64_t mem_start, uint64_t mem_end) 236 { 237 BootConfig *bc = &bootconfig; 238 239 uint64_t addr, size; 240 int index; 241 242 const uint64_t initrd_size = 243 round_page(initrd_end) - trunc_page(initrd_start); 244 if (initrd_size > 0) 245 fdt_memory_remove_range(trunc_page(initrd_start), initrd_size); 246 247 const uint64_t rndseed_size = 248 round_page(rndseed_end) - trunc_page(rndseed_start); 249 if (rndseed_size > 0) 250 fdt_memory_remove_range(trunc_page(rndseed_start), 251 rndseed_size); 252 253 const uint64_t efirng_size = 254 round_page(efirng_end) - trunc_page(efirng_start); 255 if (efirng_size > 0) 256 fdt_memory_remove_range(trunc_page(efirng_start), efirng_size); 257 258 const int framebuffer = OF_finddevice("/chosen/framebuffer"); 259 if (framebuffer >= 0) { 260 for (index = 0; 261 fdtbus_get_reg64(framebuffer, index, &addr, &size) == 0; 262 index++) { 263 fdt_memory_remove_range(addr, size); 264 } 265 } 266 267 VPRINTF("Usable memory:\n"); 268 bc->dramblocks = 0; 269 fdt_memory_foreach(fdt_add_dram_blocks, bc); 270 } 271 272 static void 273 fdt_probe_range(const char *startname, const char *endname, 274 uint64_t *pstart, uint64_t *pend) 275 { 276 int chosen, len; 277 const void *start_data, *end_data; 278 279 *pstart = *pend = 0; 280 281 chosen = OF_finddevice("/chosen"); 282 if (chosen < 0) 283 return; 284 285 start_data = fdtbus_get_prop(chosen, startname, &len); 286 end_data = fdtbus_get_prop(chosen, endname, NULL); 287 if (start_data == NULL || end_data == NULL) 288 return; 289 290 switch (len) { 291 case 4: 292 *pstart = be32dec(start_data); 293 *pend = be32dec(end_data); 294 break; 295 case 8: 296 *pstart = be64dec(start_data); 297 *pend = be64dec(end_data); 298 break; 299 default: 300 printf("Unsupported len %d for /chosen `%s'\n", 301 len, startname); 302 return; 303 } 304 } 305 306 static void * 307 fdt_map_range(uint64_t start, uint64_t end, uint64_t *psize, 308 const char *purpose) 309 { 310 const paddr_t startpa = trunc_page(start); 311 const paddr_t endpa = round_page(end); 312 paddr_t pa; 313 vaddr_t va; 314 void *ptr; 315 316 *psize = end - start; 317 if (*psize == 0) 318 return NULL; 319 320 const vaddr_t voff = start & PAGE_MASK; 321 322 va = uvm_km_alloc(kernel_map, *psize, 0, UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 323 if (va == 0) { 324 printf("Failed to allocate VA for %s\n", purpose); 325 return NULL; 326 } 327 ptr = (void *)(va + voff); 328 329 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) 330 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, 0); 331 pmap_update(pmap_kernel()); 332 333 return ptr; 334 } 335 336 static void 337 fdt_unmap_range(void *ptr, uint64_t size) 338 { 339 const char *start = ptr, *end = start + size; 340 const vaddr_t startva = trunc_page((vaddr_t)(uintptr_t)start); 341 const vaddr_t endva = round_page((vaddr_t)(uintptr_t)end); 342 const vsize_t sz = endva - startva; 343 344 pmap_kremove(startva, sz); 345 pmap_update(pmap_kernel()); 346 347 uvm_km_free(kernel_map, startva, sz, UVM_KMF_VAONLY); 348 } 349 350 static void 351 fdt_probe_initrd(uint64_t *pstart, uint64_t *pend) 352 { 353 *pstart = *pend = 0; 354 355 #ifdef MEMORY_DISK_DYNAMIC 356 fdt_probe_range("linux,initrd-start", "linux,initrd-end", pstart, pend); 357 #endif 358 } 359 360 static void 361 fdt_setup_initrd(void) 362 { 363 #ifdef MEMORY_DISK_DYNAMIC 364 void *md_start; 365 uint64_t initrd_size; 366 367 md_start = fdt_map_range(initrd_start, initrd_end, &initrd_size, 368 "initrd"); 369 if (md_start == NULL) 370 return; 371 md_root_setconf(md_start, initrd_size); 372 #endif 373 } 374 375 static void 376 fdt_probe_rndseed(uint64_t *pstart, uint64_t *pend) 377 { 378 379 fdt_probe_range("netbsd,rndseed-start", "netbsd,rndseed-end", 380 pstart, pend); 381 } 382 383 static void 384 fdt_setup_rndseed(void) 385 { 386 uint64_t rndseed_size; 387 void *rndseed; 388 389 rndseed = fdt_map_range(rndseed_start, rndseed_end, &rndseed_size, 390 "rndseed"); 391 if (rndseed == NULL) 392 return; 393 rnd_seed(rndseed, rndseed_size); 394 fdt_unmap_range(rndseed, rndseed_size); 395 } 396 397 static void 398 fdt_probe_efirng(uint64_t *pstart, uint64_t *pend) 399 { 400 401 fdt_probe_range("netbsd,efirng-start", "netbsd,efirng-end", 402 pstart, pend); 403 } 404 405 static struct krndsource efirng_source; 406 407 static void 408 fdt_setup_efirng(void) 409 { 410 uint64_t efirng_size; 411 void *efirng; 412 413 efirng = fdt_map_range(efirng_start, efirng_end, &efirng_size, 414 "efirng"); 415 if (efirng == NULL) 416 return; 417 418 rnd_attach_source(&efirng_source, "efirng", RND_TYPE_RNG, 419 RND_FLAG_DEFAULT); 420 421 /* 422 * We don't really have specific information about the physical 423 * process underlying the data provided by the firmware via the 424 * EFI RNG API, so the entropy estimate here is heuristic. 425 * What efiboot provides us is up to 4096 bytes of data from 426 * the EFI RNG API, although in principle it may return short. 427 * 428 * The UEFI Specification (2.8 Errata A, February 2020[1]) says 429 * 430 * When a Deterministic Random Bit Generator (DRBG) is 431 * used on the output of a (raw) entropy source, its 432 * security level must be at least 256 bits. 433 * 434 * It's not entirely clear whether `it' refers to the DRBG or 435 * the entropy source; if it refers to the DRBG, it's not 436 * entirely clear how ANSI X9.31 3DES, one of the options for 437 * DRBG in the UEFI spec, can provide a `256-bit security 438 * level' because it has only 232 bits of inputs (three 56-bit 439 * keys and one 64-bit block). That said, even if it provides 440 * only 232 bits of entropy, that's enough to prevent all 441 * attacks and we probably get a few more bits from sampling 442 * the clock anyway. 443 * 444 * In the event we get raw samples, e.g. the bits sampled by a 445 * ring oscillator, we hope that the samples have at least half 446 * a bit of entropy per bit of data -- and efiboot tries to 447 * draw 4096 bytes to provide plenty of slop. Hence we divide 448 * the total number of bits by two and clamp at 256. There are 449 * ways this could go wrong, but on most machines it should 450 * behave reasonably. 451 * 452 * [1] https://uefi.org/sites/default/files/resources/UEFI_Spec_2_8_A_Feb14.pdf 453 */ 454 rnd_add_data(&efirng_source, efirng, efirng_size, 455 MIN(256, efirng_size*NBBY/2)); 456 457 explicit_memset(efirng, 0, efirng_size); 458 fdt_unmap_range(efirng, efirng_size); 459 } 460 461 #ifdef EFI_RUNTIME 462 static void 463 fdt_map_efi_runtime(const char *prop, enum arm_efirt_mem_type type) 464 { 465 int len; 466 467 const int chosen_off = fdt_path_offset(fdt_data, "/chosen"); 468 if (chosen_off < 0) 469 return; 470 471 const uint64_t *map = fdt_getprop(fdt_data, chosen_off, prop, &len); 472 if (map == NULL) 473 return; 474 475 while (len >= 24) { 476 const paddr_t pa = be64toh(map[0]); 477 const vaddr_t va = be64toh(map[1]); 478 const size_t sz = be64toh(map[2]); 479 VPRINTF("%s: %s %#" PRIxPADDR "-%#" PRIxVADDR " (%#" PRIxVADDR 480 "-%#" PRIxVSIZE ")\n", __func__, prop, pa, pa + sz - 1, 481 va, va + sz - 1); 482 arm_efirt_md_map_range(va, pa, sz, type); 483 map += 3; 484 len -= 24; 485 } 486 } 487 #endif 488 489 vaddr_t 490 initarm(void *arg) 491 { 492 const struct arm_platform *plat; 493 uint64_t memory_start, memory_end; 494 495 /* set temporally to work printf()/panic() even before consinit() */ 496 cn_tab = &earlycons; 497 498 /* Load FDT */ 499 int error = fdt_check_header(fdt_addr_r); 500 if (error != 0) 501 panic("fdt_check_header failed: %s", fdt_strerror(error)); 502 503 /* If the DTB is too big, try to pack it in place first. */ 504 if (fdt_totalsize(fdt_addr_r) > sizeof(fdt_data)) 505 (void)fdt_pack(__UNCONST(fdt_addr_r)); 506 507 error = fdt_open_into(fdt_addr_r, fdt_data, sizeof(fdt_data)); 508 if (error != 0) 509 panic("fdt_move failed: %s", fdt_strerror(error)); 510 511 fdtbus_init(fdt_data); 512 513 /* Lookup platform specific backend */ 514 plat = arm_fdt_platform(); 515 if (plat == NULL) 516 panic("Kernel does not support this device"); 517 518 /* Early console may be available, announce ourselves. */ 519 VPRINTF("FDT<%p>\n", fdt_addr_r); 520 521 const int chosen = OF_finddevice("/chosen"); 522 if (chosen >= 0) 523 OF_getprop(chosen, "bootargs", bootargs, sizeof(bootargs)); 524 boot_args = bootargs; 525 526 /* Heads up ... Setup the CPU / MMU / TLB functions. */ 527 VPRINTF("cpufunc\n"); 528 if (set_cpufuncs()) 529 panic("cpu not recognized!"); 530 531 /* 532 * Memory is still identity/flat mapped this point so using ttbr for 533 * l1pt VA is fine 534 */ 535 536 VPRINTF("devmap %p\n", plat->ap_devmap()); 537 extern char ARM_BOOTSTRAP_LxPT[]; 538 pmap_devmap_bootstrap((vaddr_t)ARM_BOOTSTRAP_LxPT, plat->ap_devmap()); 539 540 VPRINTF("bootstrap\n"); 541 plat->ap_bootstrap(); 542 543 /* 544 * If stdout-path is specified on the command line, override the 545 * value in /chosen/stdout-path before initializing console. 546 */ 547 VPRINTF("stdout\n"); 548 fdt_update_stdout_path(); 549 550 #if BYTE_ORDER == BIG_ENDIAN 551 /* 552 * Most boards are configured to little-endian mode initially, and 553 * switched to big-endian mode after kernel is loaded. In this case, 554 * framebuffer seems byte-swapped to CPU. Override FDT to let 555 * drivers know. 556 */ 557 VPRINTF("fb_format\n"); 558 fdt_update_fb_format(); 559 #endif 560 561 /* 562 * Done making changes to the FDT. 563 */ 564 fdt_pack(fdt_data); 565 566 VPRINTF("consinit "); 567 consinit(); 568 VPRINTF("ok\n"); 569 570 VPRINTF("uboot: args %#lx, %#lx, %#lx, %#lx\n", 571 uboot_args[0], uboot_args[1], uboot_args[2], uboot_args[3]); 572 573 cpu_reset_address = fdt_reset; 574 cpu_powerdown_address = fdt_powerdown; 575 evbarm_device_register = fdt_device_register; 576 evbarm_device_register_post_config = fdt_device_register_post_config; 577 evbarm_cpu_rootconf = fdt_cpu_rootconf; 578 579 /* Talk to the user */ 580 printf("NetBSD/evbarm (fdt) booting ...\n"); 581 582 #ifdef BOOT_ARGS 583 char mi_bootargs[] = BOOT_ARGS; 584 parse_mi_bootargs(mi_bootargs); 585 #endif 586 587 fdt_memory_get(&memory_start, &memory_end); 588 589 fdt_memory_foreach(fdt_print_memory, NULL); 590 591 #if !defined(_LP64) 592 /* Cannot map memory above 4GB (remove last page as well) */ 593 const uint64_t memory_limit = 0x100000000ULL - PAGE_SIZE; 594 if (memory_end > memory_limit) { 595 fdt_memory_remove_range(memory_limit , memory_end); 596 memory_end = memory_limit; 597 } 598 #endif 599 uint64_t memory_size = memory_end - memory_start; 600 601 VPRINTF("%s: memory start %" PRIx64 " end %" PRIx64 " (len %" 602 PRIx64 ")\n", __func__, memory_start, memory_end, memory_size); 603 604 /* Parse ramdisk info */ 605 fdt_probe_initrd(&initrd_start, &initrd_end); 606 607 /* Parse our on-disk rndseed and the firmware's RNG from EFI */ 608 fdt_probe_rndseed(&rndseed_start, &rndseed_end); 609 fdt_probe_efirng(&efirng_start, &efirng_end); 610 611 fdt_memory_remove_reserved(memory_start, memory_end); 612 613 /* 614 * Populate bootconfig structure for the benefit of dodumpsys 615 */ 616 VPRINTF("%s: fdt_build_bootconfig\n", __func__); 617 fdt_build_bootconfig(memory_start, memory_end); 618 619 /* Perform PT build and VM init */ 620 cpu_kernel_vm_init(memory_start, memory_size); 621 622 VPRINTF("bootargs: %s\n", bootargs); 623 624 parse_mi_bootargs(boot_args); 625 626 VPRINTF("Memory regions:\n"); 627 628 /* Populate fdt_physmem / nfdt_physmem for initarm_common */ 629 fdt_memory_foreach(fdt_add_boot_physmem, &memory_size); 630 631 vaddr_t sp = initarm_common(KERNEL_VM_BASE, KERNEL_VM_SIZE, fdt_physmem, 632 nfdt_physmem); 633 634 /* 635 * initarm_common flushes cache if required before AP start 636 */ 637 error = 0; 638 if ((boothowto & RB_MD1) == 0) { 639 VPRINTF("mpstart\n"); 640 if (plat->ap_mpstart) 641 error = plat->ap_mpstart(); 642 } 643 644 if (error) 645 return sp; 646 647 /* 648 * Now we have APs started the pages used for stacks and L1PT can 649 * be given to uvm 650 */ 651 extern char const __start__init_memory[]; 652 extern char const __stop__init_memory[] __weak; 653 654 if (__start__init_memory != __stop__init_memory) { 655 const paddr_t spa = KERN_VTOPHYS((vaddr_t)__start__init_memory); 656 const paddr_t epa = KERN_VTOPHYS((vaddr_t)__stop__init_memory); 657 const paddr_t spg = atop(spa); 658 const paddr_t epg = atop(epa); 659 660 VPRINTF(" start %08lx end %08lx... " 661 "loading in freelist %d\n", spa, epa, VM_FREELIST_DEFAULT); 662 663 uvm_page_physload(spg, epg, spg, epg, VM_FREELIST_DEFAULT); 664 } 665 666 return sp; 667 } 668 669 static void 670 fdt_update_stdout_path(void) 671 { 672 char *stdout_path, *ep; 673 int stdout_path_len; 674 char buf[256]; 675 676 const int chosen_off = fdt_path_offset(fdt_data, "/chosen"); 677 if (chosen_off == -1) 678 return; 679 680 if (get_bootconf_option(boot_args, "stdout-path", 681 BOOTOPT_TYPE_STRING, &stdout_path) == 0) 682 return; 683 684 ep = strchr(stdout_path, ' '); 685 stdout_path_len = ep ? (ep - stdout_path) : strlen(stdout_path); 686 if (stdout_path_len >= sizeof(buf)) 687 return; 688 689 strncpy(buf, stdout_path, stdout_path_len); 690 buf[stdout_path_len] = '\0'; 691 fdt_setprop(fdt_data, chosen_off, "stdout-path", 692 buf, stdout_path_len + 1); 693 } 694 695 void 696 consinit(void) 697 { 698 static bool initialized = false; 699 const struct arm_platform *plat = arm_fdt_platform(); 700 const struct fdt_console *cons = fdtbus_get_console(); 701 struct fdt_attach_args faa; 702 u_int uart_freq = 0; 703 704 if (initialized || cons == NULL) 705 return; 706 707 plat->ap_init_attach_args(&faa); 708 faa.faa_phandle = fdtbus_get_stdout_phandle(); 709 710 if (plat->ap_uart_freq != NULL) 711 uart_freq = plat->ap_uart_freq(); 712 713 cons->consinit(&faa, uart_freq); 714 715 initialized = true; 716 } 717 718 void 719 cpu_startup_hook(void) 720 { 721 #ifdef EFI_RUNTIME 722 fdt_map_efi_runtime("netbsd,uefi-runtime-code", ARM_EFIRT_MEM_CODE); 723 fdt_map_efi_runtime("netbsd,uefi-runtime-data", ARM_EFIRT_MEM_DATA); 724 fdt_map_efi_runtime("netbsd,uefi-runtime-mmio", ARM_EFIRT_MEM_MMIO); 725 #endif 726 727 fdtbus_intr_init(); 728 729 fdt_setup_rndseed(); 730 fdt_setup_efirng(); 731 } 732 733 void 734 delay(u_int us) 735 { 736 const struct arm_platform *plat = arm_fdt_platform(); 737 738 plat->ap_delay(us); 739 } 740 741 static void 742 fdt_detect_root_device(device_t dev) 743 { 744 int error, len; 745 746 const int chosen = OF_finddevice("/chosen"); 747 if (chosen < 0) 748 return; 749 750 if (of_hasprop(chosen, "netbsd,mbr") && 751 of_hasprop(chosen, "netbsd,partition")) { 752 struct mbr_sector mbr; 753 uint8_t buf[DEV_BSIZE]; 754 uint8_t hash[16]; 755 const uint8_t *rhash; 756 struct vnode *vp; 757 MD5_CTX md5ctx; 758 size_t resid; 759 u_int part; 760 761 /* 762 * The bootloader has passed in a partition index and MD5 hash 763 * of the MBR sector. Read the MBR of this device, calculate the 764 * hash, and compare it with the value passed in. 765 */ 766 rhash = fdtbus_get_prop(chosen, "netbsd,mbr", &len); 767 if (rhash == NULL || len != 16) 768 return; 769 of_getprop_uint32(chosen, "netbsd,partition", &part); 770 if (part >= MAXPARTITIONS) 771 return; 772 773 vp = opendisk(dev); 774 if (!vp) 775 return; 776 error = vn_rdwr(UIO_READ, vp, buf, sizeof(buf), 0, UIO_SYSSPACE, 777 IO_NODELOCKED, NOCRED, &resid, NULL); 778 VOP_CLOSE(vp, FREAD, NOCRED); 779 vput(vp); 780 781 if (error != 0) 782 return; 783 784 memcpy(&mbr, buf, sizeof(mbr)); 785 MD5Init(&md5ctx); 786 MD5Update(&md5ctx, (void *)&mbr, sizeof(mbr)); 787 MD5Final(hash, &md5ctx); 788 789 if (memcmp(rhash, hash, 16) == 0) { 790 booted_device = dev; 791 booted_partition = part; 792 } 793 794 return; 795 } 796 797 if (of_hasprop(chosen, "netbsd,gpt-guid")) { 798 const struct uuid *guid = 799 fdtbus_get_prop(chosen, "netbsd,gpt-guid", &len); 800 801 if (guid == NULL || len != 16) 802 return; 803 804 char guidstr[UUID_STR_LEN]; 805 uuid_snprintf(guidstr, sizeof(guidstr), guid); 806 807 device_t dv = dkwedge_find_by_wname(guidstr); 808 if (dv != NULL) 809 booted_device = dv; 810 811 return; 812 } 813 814 if (of_hasprop(chosen, "netbsd,gpt-label")) { 815 const char *label = fdtbus_get_string(chosen, "netbsd,gpt-label"); 816 if (label == NULL || *label == '\0') 817 return; 818 819 device_t dv = dkwedge_find_by_wname(label); 820 if (dv != NULL) 821 booted_device = dv; 822 823 return; 824 } 825 826 if (of_hasprop(chosen, "netbsd,booted-mac-address")) { 827 const uint8_t *macaddr = 828 fdtbus_get_prop(chosen, "netbsd,booted-mac-address", &len); 829 struct ifnet *ifp; 830 831 if (macaddr == NULL || len != 6) 832 return; 833 834 int s = pserialize_read_enter(); 835 IFNET_READER_FOREACH(ifp) { 836 if (memcmp(macaddr, CLLADDR(ifp->if_sadl), len) == 0) { 837 device_t dv = device_find_by_xname(ifp->if_xname); 838 if (dv != NULL) 839 booted_device = dv; 840 break; 841 } 842 } 843 pserialize_read_exit(s); 844 845 return; 846 } 847 } 848 849 static void 850 fdt_device_register(device_t self, void *aux) 851 { 852 const struct arm_platform *plat = arm_fdt_platform(); 853 854 if (device_is_a(self, "armfdt")) { 855 fdt_setup_initrd(); 856 857 #if NWSDISPLAY > 0 && NGENFB > 0 858 /* 859 * Setup framebuffer console, if present. 860 */ 861 arm_simplefb_preattach(); 862 #endif 863 } 864 865 #if NWSDISPLAY > 0 && NGENFB > 0 866 if (device_is_a(self, "genfb")) { 867 prop_dictionary_t dict = device_properties(self); 868 prop_dictionary_set_uint64(dict, 869 "simplefb-physaddr", arm_simplefb_physaddr()); 870 } 871 #endif 872 873 if (plat && plat->ap_device_register) 874 plat->ap_device_register(self, aux); 875 } 876 877 static void 878 fdt_device_register_post_config(device_t self, void *aux) 879 { 880 #if NUKBD > 0 && NWSDISPLAY > 0 881 if (device_is_a(self, "wsdisplay")) { 882 struct wsdisplay_softc *sc = device_private(self); 883 if (wsdisplay_isconsole(sc)) 884 ukbd_cnattach(); 885 } 886 #endif 887 } 888 889 static void 890 fdt_cpu_rootconf(void) 891 { 892 device_t dev; 893 deviter_t di; 894 895 if (booted_device != NULL) 896 return; 897 898 for (dev = deviter_first(&di, 0); dev; dev = deviter_next(&di)) { 899 if (device_class(dev) != DV_DISK) 900 continue; 901 902 fdt_detect_root_device(dev); 903 904 if (booted_device != NULL) 905 break; 906 } 907 deviter_release(&di); 908 } 909 910 static void 911 fdt_reset(void) 912 { 913 const struct arm_platform *plat = arm_fdt_platform(); 914 915 fdtbus_power_reset(); 916 917 if (plat && plat->ap_reset) 918 plat->ap_reset(); 919 } 920 921 static void 922 fdt_powerdown(void) 923 { 924 fdtbus_power_poweroff(); 925 } 926 927 #if BYTE_ORDER == BIG_ENDIAN 928 static void 929 fdt_update_fb_format(void) 930 { 931 int off, len; 932 const char *format, *replace; 933 934 off = fdt_path_offset(fdt_data, "/chosen"); 935 if (off < 0) 936 return; 937 938 for (;;) { 939 off = fdt_node_offset_by_compatible(fdt_data, off, 940 "simple-framebuffer"); 941 if (off < 0) 942 return; 943 944 format = fdt_getprop(fdt_data, off, "format", &len); 945 if (format == NULL) 946 continue; 947 948 replace = NULL; 949 if (strcmp(format, "a8b8g8r8") == 0) 950 replace = "r8g8b8a8"; 951 else if (strcmp(format, "x8r8g8b8") == 0) 952 replace = "b8g8r8x8"; 953 if (replace != NULL) 954 fdt_setprop(fdt_data, off, "format", replace, 955 strlen(replace) + 1); 956 } 957 } 958 #endif 959