fdt_machdep.c revision 1.108
1 /* $NetBSD: fdt_machdep.c,v 1.108 2024/06/30 17:55:28 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 1.108 2024/06/30 17:55:28 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 "ukbd.h" 42 #include "wsdisplay.h" 43 44 #include <sys/param.h> 45 #include <sys/types.h> 46 47 #include <sys/atomic.h> 48 #include <sys/bootblock.h> 49 #include <sys/bus.h> 50 #include <sys/conf.h> 51 #include <sys/cpu.h> 52 #include <sys/device.h> 53 #include <sys/disk.h> 54 #include <sys/disklabel.h> 55 #include <sys/endian.h> 56 #include <sys/exec.h> 57 #include <sys/fcntl.h> 58 #include <sys/kauth.h> 59 #include <sys/kernel.h> 60 #include <sys/kmem.h> 61 #include <sys/ksyms.h> 62 #include <sys/md5.h> 63 #include <sys/msgbuf.h> 64 #include <sys/proc.h> 65 #include <sys/pserialize.h> 66 #include <sys/reboot.h> 67 #include <sys/systm.h> 68 #include <sys/termios.h> 69 #include <sys/vnode.h> 70 #include <sys/uuid.h> 71 72 #include <net/if.h> 73 #include <net/if_dl.h> 74 75 #include <dev/cons.h> 76 #include <uvm/uvm_extern.h> 77 78 #include <machine/db_machdep.h> 79 #include <ddb/db_sym.h> 80 #include <ddb/db_extern.h> 81 82 #include <machine/bootconfig.h> 83 #include <arm/armreg.h> 84 85 #include <arm/cpufunc.h> 86 87 #include <evbarm/include/autoconf.h> 88 #include <evbarm/fdt/machdep.h> 89 #include <evbarm/fdt/platform.h> 90 91 #include <arm/fdt/arm_fdtvar.h> 92 93 #include <dev/fdt/fdtvar.h> 94 #include <dev/fdt/fdt_boot.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 BootConfig bootconfig; 114 char *boot_args = NULL; 115 116 /* filled in before cleaning bss. keep in .data */ 117 u_long uboot_args[4] __attribute__((__section__(".data"))); 118 const uint8_t *fdt_addr_r __attribute__((__section__(".data"))); 119 120 #include <libfdt.h> 121 #include <dev/fdt/fdtvar.h> 122 #define FDT_BUF_SIZE (512*1024) 123 static uint8_t fdt_data[FDT_BUF_SIZE]; 124 125 extern char KERNEL_BASE_phys[]; 126 #define KERNEL_BASE_PHYS ((paddr_t)KERNEL_BASE_phys) 127 128 static void fdt_device_register(device_t, void *); 129 static void fdt_device_register_post_config(device_t, void *); 130 static void fdt_reset(void); 131 static void fdt_powerdown(void); 132 133 #if BYTE_ORDER == BIG_ENDIAN 134 static void fdt_update_fb_format(void); 135 #endif 136 137 static void 138 earlyconsputc(dev_t dev, int c) 139 { 140 uartputc(c); 141 } 142 143 static int 144 earlyconsgetc(dev_t dev) 145 { 146 return -1; 147 } 148 149 static struct consdev earlycons = { 150 .cn_putc = earlyconsputc, 151 .cn_getc = earlyconsgetc, 152 .cn_pollc = nullcnpollc, 153 }; 154 155 #ifdef VERBOSE_INIT_ARM 156 #define VPRINTF(...) printf(__VA_ARGS__) 157 #else 158 #define VPRINTF(...) __nothing 159 #endif 160 161 static void 162 fdt_add_dram_blocks(const struct fdt_memory *m, void *arg) 163 { 164 BootConfig *bc = arg; 165 166 VPRINTF(" %" PRIx64 " - %" PRIx64 "\n", m->start, m->end - 1); 167 bc->dram[bc->dramblocks].address = m->start; 168 bc->dram[bc->dramblocks].pages = 169 (m->end - m->start) / PAGE_SIZE; 170 bc->dramblocks++; 171 } 172 173 static int nfdt_physmem = 0; 174 static struct boot_physmem fdt_physmem[FDT_MEMORY_RANGES]; 175 176 static void 177 fdt_add_boot_physmem(const struct fdt_memory *m, void *arg) 178 { 179 const paddr_t saddr = round_page(m->start); 180 const paddr_t eaddr = trunc_page(m->end); 181 182 VPRINTF(" %" PRIx64 " - %" PRIx64, m->start, m->end - 1); 183 if (saddr >= eaddr) { 184 VPRINTF(" skipped\n"); 185 return; 186 } 187 VPRINTF("\n"); 188 189 struct boot_physmem *bp = &fdt_physmem[nfdt_physmem++]; 190 191 KASSERT(nfdt_physmem <= FDT_MEMORY_RANGES); 192 193 bp->bp_start = atop(saddr); 194 bp->bp_pages = atop(eaddr) - bp->bp_start; 195 bp->bp_freelist = VM_FREELIST_DEFAULT; 196 197 #ifdef PMAP_NEED_ALLOC_POOLPAGE 198 const uint64_t memory_size = *(uint64_t *)arg; 199 if (atop(memory_size) > bp->bp_pages) { 200 arm_poolpage_vmfreelist = VM_FREELIST_DIRECTMAP; 201 bp->bp_freelist = VM_FREELIST_DIRECTMAP; 202 } 203 #endif 204 } 205 206 207 static void 208 fdt_print_memory(const struct fdt_memory *m, void *arg) 209 { 210 211 VPRINTF("FDT /memory @ 0x%" PRIx64 " size 0x%" PRIx64 "\n", 212 m->start, m->end - m->start); 213 } 214 215 216 /* 217 * Define usable memory regions. 218 */ 219 static void 220 fdt_build_bootconfig(uint64_t mem_start, uint64_t mem_end) 221 { 222 BootConfig *bc = &bootconfig; 223 224 uint64_t addr, size; 225 int index; 226 227 /* Reserve pages for ramdisk, rndseed, and firmware's RNG */ 228 fdt_reserve_initrd(); 229 fdt_reserve_rndseed(); 230 fdt_reserve_efirng(); 231 232 const int framebuffer = OF_finddevice("/chosen/framebuffer"); 233 if (framebuffer >= 0) { 234 for (index = 0; 235 fdtbus_get_reg64(framebuffer, index, &addr, &size) == 0; 236 index++) { 237 fdt_memory_remove_range(addr, size); 238 } 239 } 240 241 VPRINTF("Usable memory:\n"); 242 bc->dramblocks = 0; 243 fdt_memory_foreach(fdt_add_dram_blocks, bc); 244 } 245 246 247 vaddr_t 248 initarm(void *arg) 249 { 250 const struct fdt_platform *plat; 251 uint64_t memory_start, memory_end; 252 253 /* set temporally to work printf()/panic() even before consinit() */ 254 cn_tab = &earlycons; 255 256 /* Load FDT */ 257 int error = fdt_check_header(fdt_addr_r); 258 if (error != 0) 259 panic("fdt_check_header failed: %s", fdt_strerror(error)); 260 261 /* If the DTB is too big, try to pack it in place first. */ 262 if (fdt_totalsize(fdt_addr_r) > sizeof(fdt_data)) 263 (void)fdt_pack(__UNCONST(fdt_addr_r)); 264 265 error = fdt_open_into(fdt_addr_r, fdt_data, sizeof(fdt_data)); 266 if (error != 0) 267 panic("fdt_move failed: %s", fdt_strerror(error)); 268 269 fdtbus_init(fdt_data); 270 271 /* Lookup platform specific backend */ 272 plat = fdt_platform_find(); 273 if (plat == NULL) 274 panic("Kernel does not support this device"); 275 276 /* Early console may be available, announce ourselves. */ 277 VPRINTF("FDT<%p>\n", fdt_addr_r); 278 279 boot_args = fdt_get_bootargs(); 280 281 /* Heads up ... Setup the CPU / MMU / TLB functions. */ 282 VPRINTF("cpufunc\n"); 283 if (set_cpufuncs()) 284 panic("cpu not recognized!"); 285 286 /* 287 * Memory is still identity/flat mapped this point so using ttbr for 288 * l1pt VA is fine 289 */ 290 291 VPRINTF("devmap %p\n", plat->fp_devmap()); 292 extern char ARM_BOOTSTRAP_LxPT[]; 293 pmap_devmap_bootstrap((vaddr_t)ARM_BOOTSTRAP_LxPT, plat->fp_devmap()); 294 295 VPRINTF("bootstrap\n"); 296 plat->fp_bootstrap(); 297 298 /* 299 * If stdout-path is specified on the command line, override the 300 * value in /chosen/stdout-path before initializing console. 301 */ 302 VPRINTF("stdout\n"); 303 fdt_update_stdout_path(fdt_data, boot_args); 304 305 #if BYTE_ORDER == BIG_ENDIAN 306 /* 307 * Most boards are configured to little-endian mode initially, and 308 * switched to big-endian mode after kernel is loaded. In this case, 309 * framebuffer seems byte-swapped to CPU. Override FDT to let 310 * drivers know. 311 */ 312 VPRINTF("fb_format\n"); 313 fdt_update_fb_format(); 314 #endif 315 316 /* 317 * Done making changes to the FDT. 318 */ 319 fdt_pack(fdt_data); 320 321 VPRINTF("consinit "); 322 consinit(); 323 VPRINTF("ok\n"); 324 325 VPRINTF("uboot: args %#lx, %#lx, %#lx, %#lx\n", 326 uboot_args[0], uboot_args[1], uboot_args[2], uboot_args[3]); 327 328 cpu_reset_address = fdt_reset; 329 cpu_powerdown_address = fdt_powerdown; 330 evbarm_device_register = fdt_device_register; 331 evbarm_device_register_post_config = fdt_device_register_post_config; 332 evbarm_cpu_rootconf = fdt_cpu_rootconf; 333 334 /* Talk to the user */ 335 printf("NetBSD/evbarm (fdt) booting ...\n"); 336 337 #ifdef BOOT_ARGS 338 char mi_bootargs[] = BOOT_ARGS; 339 parse_mi_bootargs(mi_bootargs); 340 #endif 341 342 fdt_memory_get(&memory_start, &memory_end); 343 344 fdt_memory_foreach(fdt_print_memory, NULL); 345 346 #if !defined(_LP64) 347 /* Cannot map memory above 4GB (remove last page as well) */ 348 const uint64_t memory_limit = 0x100000000ULL - PAGE_SIZE; 349 if (memory_end > memory_limit) { 350 fdt_memory_remove_range(memory_limit , memory_end); 351 memory_end = memory_limit; 352 } 353 #endif 354 uint64_t memory_size = memory_end - memory_start; 355 356 VPRINTF("%s: memory start %" PRIx64 " end %" PRIx64 " (len %" 357 PRIx64 ")\n", __func__, memory_start, memory_end, memory_size); 358 359 /* Parse ramdisk info */ 360 fdt_probe_initrd(); 361 362 /* Parse our on-disk rndseed and the firmware's RNG from EFI */ 363 fdt_probe_rndseed(); 364 fdt_probe_efirng(); 365 366 fdt_memory_remove_reserved(memory_start, memory_end); 367 368 /* 369 * Populate bootconfig structure for the benefit of dodumpsys 370 */ 371 VPRINTF("%s: fdt_build_bootconfig\n", __func__); 372 fdt_build_bootconfig(memory_start, memory_end); 373 374 /* Perform PT build and VM init */ 375 cpu_kernel_vm_init(memory_start, memory_size); 376 377 VPRINTF("bootargs: %s\n", boot_args); 378 379 parse_mi_bootargs(boot_args); 380 381 VPRINTF("Memory regions:\n"); 382 383 /* Populate fdt_physmem / nfdt_physmem for initarm_common */ 384 fdt_memory_foreach(fdt_add_boot_physmem, &memory_size); 385 386 vaddr_t sp = initarm_common(KERNEL_VM_BASE, KERNEL_VM_SIZE, fdt_physmem, 387 nfdt_physmem); 388 389 /* 390 * initarm_common flushes cache if required before AP start 391 */ 392 error = 0; 393 if ((boothowto & RB_MD1) == 0) { 394 VPRINTF("mpstart\n"); 395 if (plat->fp_mpstart) 396 error = plat->fp_mpstart(); 397 } 398 399 if (error) 400 return sp; 401 402 /* 403 * Now we have APs started the pages used for stacks and L1PT can 404 * be given to uvm 405 */ 406 extern char const __start__init_memory[]; 407 extern char const __stop__init_memory[] __weak; 408 409 if (&__start__init_memory[0] != &__stop__init_memory[0]) { 410 const paddr_t spa = KERN_VTOPHYS((vaddr_t)__start__init_memory); 411 const paddr_t epa = KERN_VTOPHYS((vaddr_t)__stop__init_memory); 412 const paddr_t spg = atop(spa); 413 const paddr_t epg = atop(epa); 414 415 VPRINTF(" start %08lx end %08lx... " 416 "loading in freelist %d\n", spa, epa, VM_FREELIST_DEFAULT); 417 418 uvm_page_physload(spg, epg, spg, epg, VM_FREELIST_DEFAULT); 419 } 420 421 return sp; 422 } 423 424 void 425 consinit(void) 426 { 427 static bool initialized = false; 428 const struct fdt_platform *plat = fdt_platform_find(); 429 const struct fdt_console *cons = fdtbus_get_console(); 430 struct fdt_attach_args faa; 431 u_int uart_freq = 0; 432 433 if (initialized || cons == NULL) 434 return; 435 436 plat->fp_init_attach_args(&faa); 437 faa.faa_phandle = fdtbus_get_stdout_phandle(); 438 439 if (plat->fp_uart_freq != NULL) 440 uart_freq = plat->fp_uart_freq(); 441 442 cons->consinit(&faa, uart_freq); 443 444 initialized = true; 445 } 446 447 void 448 cpu_startup_hook(void) 449 { 450 #ifdef EFI_RUNTIME 451 fdt_map_efi_runtime("netbsd,uefi-runtime-code", ARM_EFIRT_MEM_CODE); 452 fdt_map_efi_runtime("netbsd,uefi-runtime-data", ARM_EFIRT_MEM_DATA); 453 fdt_map_efi_runtime("netbsd,uefi-runtime-mmio", ARM_EFIRT_MEM_MMIO); 454 #endif 455 456 fdtbus_intr_init(); 457 458 fdt_setup_rndseed(); 459 fdt_setup_efirng(); 460 } 461 462 void 463 delay(u_int us) 464 { 465 const struct fdt_platform *plat = fdt_platform_find(); 466 467 plat->fp_delay(us); 468 } 469 static void 470 fdt_device_register(device_t self, void *aux) 471 { 472 const struct fdt_platform *plat = fdt_platform_find(); 473 474 if (device_is_a(self, "armfdt")) { 475 fdt_setup_initrd(); 476 477 #if NWSDISPLAY > 0 && NGENFB > 0 478 /* 479 * Setup framebuffer console, if present. 480 */ 481 arm_simplefb_preattach(); 482 #endif 483 } 484 485 #if NWSDISPLAY > 0 && NGENFB > 0 486 if (device_is_a(self, "genfb")) { 487 prop_dictionary_t dict = device_properties(self); 488 prop_dictionary_set_uint64(dict, 489 "simplefb-physaddr", arm_simplefb_physaddr()); 490 } 491 #endif 492 493 if (plat && plat->fp_device_register) 494 plat->fp_device_register(self, aux); 495 } 496 497 static void 498 fdt_device_register_post_config(device_t self, void *aux) 499 { 500 const struct fdt_platform *plat = fdt_platform_find(); 501 502 if (plat && plat->fp_device_register_post_config) 503 plat->fp_device_register_post_config(self, aux); 504 505 #if NUKBD > 0 && NWSDISPLAY > 0 506 if (device_is_a(self, "wsdisplay")) { 507 struct wsdisplay_softc *sc = device_private(self); 508 if (wsdisplay_isconsole(sc)) 509 ukbd_cnattach(); 510 } 511 #endif 512 } 513 514 static void 515 fdt_reset(void) 516 { 517 const struct fdt_platform *plat = fdt_platform_find(); 518 519 fdtbus_power_reset(); 520 521 if (plat && plat->fp_reset) 522 plat->fp_reset(); 523 } 524 525 static void 526 fdt_powerdown(void) 527 { 528 fdtbus_power_poweroff(); 529 } 530 531 #if BYTE_ORDER == BIG_ENDIAN 532 static void 533 fdt_update_fb_format(void) 534 { 535 int off, len; 536 const char *format, *replace; 537 538 off = fdt_path_offset(fdt_data, "/chosen"); 539 if (off < 0) 540 return; 541 542 for (;;) { 543 off = fdt_node_offset_by_compatible(fdt_data, off, 544 "simple-framebuffer"); 545 if (off < 0) 546 return; 547 548 format = fdt_getprop(fdt_data, off, "format", &len); 549 if (format == NULL) 550 continue; 551 552 replace = NULL; 553 if (strcmp(format, "a8b8g8r8") == 0) 554 replace = "r8g8b8a8"; 555 else if (strcmp(format, "x8r8g8b8") == 0) 556 replace = "b8g8r8x8"; 557 if (replace != NULL) 558 fdt_setprop(fdt_data, off, "format", replace, 559 strlen(replace) + 1); 560 } 561 } 562 #endif 563
Indexes created Tue Sep 30 11:09:46 GMT 2025