fdt_machdep.c revision 1.109
1 /* $NetBSD: fdt_machdep.c,v 1.109 2025/03/08 14:30:05 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2015-2017 Jared McNeill <jmcneill (at) 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 1.109 2025/03/08 14:30:05 jmcneill 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_multiprocessor.h" 39 40 #include "genfb.h" 41 #include "pci.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/systm.h> 69 #include <sys/termios.h> 70 #include <sys/vnode.h> 71 #include <sys/uuid.h> 72 73 #include <net/if.h> 74 #include <net/if_dl.h> 75 76 #include <dev/cons.h> 77 #include <uvm/uvm_extern.h> 78 79 #include <machine/db_machdep.h> 80 #include <ddb/db_sym.h> 81 #include <ddb/db_extern.h> 82 83 #include <machine/bootconfig.h> 84 #include <arm/armreg.h> 85 86 #include <arm/cpufunc.h> 87 88 #include <evbarm/include/autoconf.h> 89 #include <evbarm/fdt/machdep.h> 90 #include <evbarm/fdt/platform.h> 91 92 #include <arm/fdt/arm_fdtvar.h> 93 94 #include <dev/fdt/fdtvar.h> 95 #include <dev/fdt/fdt_boot.h> 96 #include <dev/fdt/fdt_private.h> 97 #include <dev/fdt/fdt_memory.h> 98 99 #ifdef EFI_RUNTIME 100 #include <arm/arm/efi_runtime.h> 101 #endif 102 103 #if NWSDISPLAY > 0 && NGENFB > 0 104 #include <arm/fdt/arm_simplefb.h> 105 #endif 106 107 #if NUKBD > 0 108 #include <dev/usb/ukbdvar.h> 109 #endif 110 #if NWSDISPLAY > 0 111 #include <dev/wscons/wsdisplayvar.h> 112 #endif 113 114 #if NPCI > 0 115 #include <dev/pci/pcireg.h> 116 #include <dev/pci/pcivar.h> 117 #endif 118 119 BootConfig bootconfig; 120 char *boot_args = NULL; 121 122 /* filled in before cleaning bss. keep in .data */ 123 u_long uboot_args[4] __attribute__((__section__(".data"))); 124 const uint8_t *fdt_addr_r __attribute__((__section__(".data"))); 125 126 #include <libfdt.h> 127 #include <dev/fdt/fdtvar.h> 128 #define FDT_BUF_SIZE (512*1024) 129 static uint8_t fdt_data[FDT_BUF_SIZE]; 130 131 extern char KERNEL_BASE_phys[]; 132 #define KERNEL_BASE_PHYS ((paddr_t)KERNEL_BASE_phys) 133 134 static void fdt_device_register(device_t, void *); 135 static void fdt_device_register_post_config(device_t, void *); 136 static void fdt_reset(void); 137 static void fdt_powerdown(void); 138 139 #if BYTE_ORDER == BIG_ENDIAN 140 static void fdt_update_fb_format(void); 141 #endif 142 143 static void 144 earlyconsputc(dev_t dev, int c) 145 { 146 uartputc(c); 147 } 148 149 static int 150 earlyconsgetc(dev_t dev) 151 { 152 return -1; 153 } 154 155 static struct consdev earlycons = { 156 .cn_putc = earlyconsputc, 157 .cn_getc = earlyconsgetc, 158 .cn_pollc = nullcnpollc, 159 }; 160 161 #ifdef VERBOSE_INIT_ARM 162 #define VPRINTF(...) printf(__VA_ARGS__) 163 #else 164 #define VPRINTF(...) __nothing 165 #endif 166 167 static void 168 fdt_add_dram_blocks(const struct fdt_memory *m, void *arg) 169 { 170 BootConfig *bc = arg; 171 172 VPRINTF(" %" PRIx64 " - %" PRIx64 "\n", m->start, m->end - 1); 173 bc->dram[bc->dramblocks].address = m->start; 174 bc->dram[bc->dramblocks].pages = 175 (m->end - m->start) / PAGE_SIZE; 176 bc->dramblocks++; 177 } 178 179 static int nfdt_physmem = 0; 180 static struct boot_physmem fdt_physmem[FDT_MEMORY_RANGES]; 181 182 static void 183 fdt_add_boot_physmem(const struct fdt_memory *m, void *arg) 184 { 185 const paddr_t saddr = round_page(m->start); 186 const paddr_t eaddr = trunc_page(m->end); 187 188 VPRINTF(" %" PRIx64 " - %" PRIx64, m->start, m->end - 1); 189 if (saddr >= eaddr) { 190 VPRINTF(" skipped\n"); 191 return; 192 } 193 VPRINTF("\n"); 194 195 struct boot_physmem *bp = &fdt_physmem[nfdt_physmem++]; 196 197 KASSERT(nfdt_physmem <= FDT_MEMORY_RANGES); 198 199 bp->bp_start = atop(saddr); 200 bp->bp_pages = atop(eaddr) - bp->bp_start; 201 bp->bp_freelist = VM_FREELIST_DEFAULT; 202 203 #ifdef PMAP_NEED_ALLOC_POOLPAGE 204 const uint64_t memory_size = *(uint64_t *)arg; 205 if (atop(memory_size) > bp->bp_pages) { 206 arm_poolpage_vmfreelist = VM_FREELIST_DIRECTMAP; 207 bp->bp_freelist = VM_FREELIST_DIRECTMAP; 208 } 209 #endif 210 } 211 212 213 static void 214 fdt_print_memory(const struct fdt_memory *m, void *arg) 215 { 216 217 VPRINTF("FDT /memory @ 0x%" PRIx64 " size 0x%" PRIx64 "\n", 218 m->start, m->end - m->start); 219 } 220 221 222 /* 223 * Define usable memory regions. 224 */ 225 static void 226 fdt_build_bootconfig(uint64_t mem_start, uint64_t mem_end) 227 { 228 BootConfig *bc = &bootconfig; 229 230 uint64_t addr, size; 231 int index; 232 233 /* Reserve pages for ramdisk, rndseed, and firmware's RNG */ 234 fdt_reserve_initrd(); 235 fdt_reserve_rndseed(); 236 fdt_reserve_efirng(); 237 238 const int framebuffer = OF_finddevice("/chosen/framebuffer"); 239 if (framebuffer >= 0) { 240 for (index = 0; 241 fdtbus_get_reg64(framebuffer, index, &addr, &size) == 0; 242 index++) { 243 fdt_memory_remove_range(addr, size); 244 } 245 } 246 247 VPRINTF("Usable memory:\n"); 248 bc->dramblocks = 0; 249 fdt_memory_foreach(fdt_add_dram_blocks, bc); 250 } 251 252 253 vaddr_t 254 initarm(void *arg) 255 { 256 const struct fdt_platform *plat; 257 uint64_t memory_start, memory_end; 258 259 /* set temporally to work printf()/panic() even before consinit() */ 260 cn_tab = &earlycons; 261 262 /* Load FDT */ 263 int error = fdt_check_header(fdt_addr_r); 264 if (error != 0) 265 panic("fdt_check_header failed: %s", fdt_strerror(error)); 266 267 /* If the DTB is too big, try to pack it in place first. */ 268 if (fdt_totalsize(fdt_addr_r) > sizeof(fdt_data)) 269 (void)fdt_pack(__UNCONST(fdt_addr_r)); 270 271 error = fdt_open_into(fdt_addr_r, fdt_data, sizeof(fdt_data)); 272 if (error != 0) 273 panic("fdt_move failed: %s", fdt_strerror(error)); 274 275 fdtbus_init(fdt_data); 276 277 /* Lookup platform specific backend */ 278 plat = fdt_platform_find(); 279 if (plat == NULL) 280 panic("Kernel does not support this device"); 281 282 /* Early console may be available, announce ourselves. */ 283 VPRINTF("FDT<%p>\n", fdt_addr_r); 284 285 boot_args = fdt_get_bootargs(); 286 287 /* Heads up ... Setup the CPU / MMU / TLB functions. */ 288 VPRINTF("cpufunc\n"); 289 if (set_cpufuncs()) 290 panic("cpu not recognized!"); 291 292 /* 293 * Memory is still identity/flat mapped this point so using ttbr for 294 * l1pt VA is fine 295 */ 296 297 VPRINTF("devmap %p\n", plat->fp_devmap()); 298 extern char ARM_BOOTSTRAP_LxPT[]; 299 pmap_devmap_bootstrap((vaddr_t)ARM_BOOTSTRAP_LxPT, plat->fp_devmap()); 300 301 VPRINTF("bootstrap\n"); 302 plat->fp_bootstrap(); 303 304 /* 305 * If stdout-path is specified on the command line, override the 306 * value in /chosen/stdout-path before initializing console. 307 */ 308 VPRINTF("stdout\n"); 309 fdt_update_stdout_path(fdt_data, boot_args); 310 311 #if BYTE_ORDER == BIG_ENDIAN 312 /* 313 * Most boards are configured to little-endian mode initially, and 314 * switched to big-endian mode after kernel is loaded. In this case, 315 * framebuffer seems byte-swapped to CPU. Override FDT to let 316 * drivers know. 317 */ 318 VPRINTF("fb_format\n"); 319 fdt_update_fb_format(); 320 #endif 321 322 /* 323 * Done making changes to the FDT. 324 */ 325 fdt_pack(fdt_data); 326 327 VPRINTF("consinit "); 328 consinit(); 329 VPRINTF("ok\n"); 330 331 VPRINTF("uboot: args %#lx, %#lx, %#lx, %#lx\n", 332 uboot_args[0], uboot_args[1], uboot_args[2], uboot_args[3]); 333 334 cpu_reset_address = fdt_reset; 335 cpu_powerdown_address = fdt_powerdown; 336 evbarm_device_register = fdt_device_register; 337 evbarm_device_register_post_config = fdt_device_register_post_config; 338 evbarm_cpu_rootconf = fdt_cpu_rootconf; 339 340 /* Talk to the user */ 341 printf("NetBSD/evbarm (fdt) booting ...\n"); 342 343 #ifdef BOOT_ARGS 344 char mi_bootargs[] = BOOT_ARGS; 345 parse_mi_bootargs(mi_bootargs); 346 #endif 347 348 fdt_memory_get(&memory_start, &memory_end); 349 350 fdt_memory_foreach(fdt_print_memory, NULL); 351 352 #if !defined(_LP64) 353 /* Cannot map memory above 4GB (remove last page as well) */ 354 const uint64_t memory_limit = 0x100000000ULL - PAGE_SIZE; 355 if (memory_end > memory_limit) { 356 fdt_memory_remove_range(memory_limit , memory_end); 357 memory_end = memory_limit; 358 } 359 #endif 360 uint64_t memory_size = memory_end - memory_start; 361 362 VPRINTF("%s: memory start %" PRIx64 " end %" PRIx64 " (len %" 363 PRIx64 ")\n", __func__, memory_start, memory_end, memory_size); 364 365 /* Parse ramdisk info */ 366 fdt_probe_initrd(); 367 368 /* Parse our on-disk rndseed and the firmware's RNG from EFI */ 369 fdt_probe_rndseed(); 370 fdt_probe_efirng(); 371 372 fdt_memory_remove_reserved(memory_start, memory_end); 373 374 /* 375 * Populate bootconfig structure for the benefit of dodumpsys 376 */ 377 VPRINTF("%s: fdt_build_bootconfig\n", __func__); 378 fdt_build_bootconfig(memory_start, memory_end); 379 380 /* Perform PT build and VM init */ 381 cpu_kernel_vm_init(memory_start, memory_size); 382 383 VPRINTF("bootargs: %s\n", boot_args); 384 385 parse_mi_bootargs(boot_args); 386 387 VPRINTF("Memory regions:\n"); 388 389 /* Populate fdt_physmem / nfdt_physmem for initarm_common */ 390 fdt_memory_foreach(fdt_add_boot_physmem, &memory_size); 391 392 vaddr_t sp = initarm_common(KERNEL_VM_BASE, KERNEL_VM_SIZE, fdt_physmem, 393 nfdt_physmem); 394 395 /* 396 * initarm_common flushes cache if required before AP start 397 */ 398 error = 0; 399 if ((boothowto & RB_MD1) == 0) { 400 VPRINTF("mpstart\n"); 401 if (plat->fp_mpstart) 402 error = plat->fp_mpstart(); 403 } 404 405 if (error) 406 return sp; 407 408 /* 409 * Now we have APs started the pages used for stacks and L1PT can 410 * be given to uvm 411 */ 412 extern char const __start__init_memory[]; 413 extern char const __stop__init_memory[] __weak; 414 415 if (&__start__init_memory[0] != &__stop__init_memory[0]) { 416 const paddr_t spa = KERN_VTOPHYS((vaddr_t)__start__init_memory); 417 const paddr_t epa = KERN_VTOPHYS((vaddr_t)__stop__init_memory); 418 const paddr_t spg = atop(spa); 419 const paddr_t epg = atop(epa); 420 421 VPRINTF(" start %08lx end %08lx... " 422 "loading in freelist %d\n", spa, epa, VM_FREELIST_DEFAULT); 423 424 uvm_page_physload(spg, epg, spg, epg, VM_FREELIST_DEFAULT); 425 } 426 427 return sp; 428 } 429 430 void 431 consinit(void) 432 { 433 static bool initialized = false; 434 const struct fdt_platform *plat = fdt_platform_find(); 435 const struct fdt_console *cons = fdtbus_get_console(); 436 struct fdt_attach_args faa; 437 u_int uart_freq = 0; 438 439 if (initialized || cons == NULL) 440 return; 441 442 plat->fp_init_attach_args(&faa); 443 faa.faa_phandle = fdtbus_get_stdout_phandle(); 444 445 if (plat->fp_uart_freq != NULL) 446 uart_freq = plat->fp_uart_freq(); 447 448 cons->consinit(&faa, uart_freq); 449 450 initialized = true; 451 } 452 453 void 454 cpu_startup_hook(void) 455 { 456 #ifdef EFI_RUNTIME 457 fdt_map_efi_runtime("netbsd,uefi-runtime-code", ARM_EFIRT_MEM_CODE); 458 fdt_map_efi_runtime("netbsd,uefi-runtime-data", ARM_EFIRT_MEM_DATA); 459 fdt_map_efi_runtime("netbsd,uefi-runtime-mmio", ARM_EFIRT_MEM_MMIO); 460 #endif 461 462 fdtbus_intr_init(); 463 464 fdt_setup_rndseed(); 465 fdt_setup_efirng(); 466 } 467 468 void 469 delay(u_int us) 470 { 471 const struct fdt_platform *plat = fdt_platform_find(); 472 473 plat->fp_delay(us); 474 } 475 static void 476 fdt_device_register(device_t self, void *aux) 477 { 478 const struct fdt_platform *plat = fdt_platform_find(); 479 480 if (device_is_a(self, "armfdt")) { 481 fdt_setup_initrd(); 482 483 #if NWSDISPLAY > 0 && NGENFB > 0 484 /* 485 * Setup framebuffer console, if present. 486 */ 487 arm_simplefb_preattach(); 488 #endif 489 } 490 491 #if NWSDISPLAY > 0 && NGENFB > 0 492 if (device_is_a(self, "genfb")) { 493 prop_dictionary_t dict = device_properties(self); 494 prop_dictionary_set_uint64(dict, 495 "simplefb-physaddr", arm_simplefb_physaddr()); 496 } 497 498 #if NPCI > 0 499 /* 500 * Gross hack to allow handoff of console from genfb to a PCI DRM 501 * display driver. Will match the first device that attaches, which 502 * is not ideal, but better than nothing for now. Similar to how 503 * this is handled on x86. 504 */ 505 if (device_parent(self) != NULL && 506 device_is_a(device_parent(self), "pci")) { 507 static bool found_pci_console = false; 508 struct pci_attach_args *pa = aux; 509 510 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY && 511 !found_pci_console) { 512 prop_dictionary_t dict = device_properties(self); 513 prop_dictionary_set_bool(dict, "is_console", true); 514 found_pci_console = true; 515 } 516 } 517 #endif 518 #endif 519 520 if (plat && plat->fp_device_register) 521 plat->fp_device_register(self, aux); 522 } 523 524 static void 525 fdt_device_register_post_config(device_t self, void *aux) 526 { 527 const struct fdt_platform *plat = fdt_platform_find(); 528 529 if (plat && plat->fp_device_register_post_config) 530 plat->fp_device_register_post_config(self, aux); 531 532 #if NUKBD > 0 && NWSDISPLAY > 0 533 if (device_is_a(self, "wsdisplay")) { 534 struct wsdisplay_softc *sc = device_private(self); 535 if (wsdisplay_isconsole(sc)) 536 ukbd_cnattach(); 537 } 538 #endif 539 } 540 541 static void 542 fdt_reset(void) 543 { 544 const struct fdt_platform *plat = fdt_platform_find(); 545 546 fdtbus_power_reset(); 547 548 if (plat && plat->fp_reset) 549 plat->fp_reset(); 550 } 551 552 static void 553 fdt_powerdown(void) 554 { 555 fdtbus_power_poweroff(); 556 } 557 558 #if BYTE_ORDER == BIG_ENDIAN 559 static void 560 fdt_update_fb_format(void) 561 { 562 int off, len; 563 const char *format, *replace; 564 565 off = fdt_path_offset(fdt_data, "/chosen"); 566 if (off < 0) 567 return; 568 569 for (;;) { 570 off = fdt_node_offset_by_compatible(fdt_data, off, 571 "simple-framebuffer"); 572 if (off < 0) 573 return; 574 575 format = fdt_getprop(fdt_data, off, "format", &len); 576 if (format == NULL) 577 continue; 578 579 replace = NULL; 580 if (strcmp(format, "a8b8g8r8") == 0) 581 replace = "r8g8b8a8"; 582 else if (strcmp(format, "x8r8g8b8") == 0) 583 replace = "b8g8r8x8"; 584 if (replace != NULL) 585 fdt_setprop(fdt_data, off, "format", replace, 586 strlen(replace) + 1); 587 } 588 } 589 #endif 590
Indexes created Tue Sep 30 11:09:46 GMT 2025